WO2013037323A1 - Method and device for managing cell interference - Google Patents

Abstract

Provided in embodiments of the present invention are a method and device for managing cell interference. The method comprises: generating carrier coordination information, where the carrier coordination information comprises frequency information of a carrier and trans-carrier scheduling-related information of the carrier, and where the trans-carrier scheduling-related information is for use by a first base station and by a second base station in negotiating scheduling characteristics of the carrier, thus reducing on the carrier a co-channel interference between the first base station and the second base station; and transmitting the carrier coordination information to the second base station. The embodiments of the present invention allow for the exchange between base stations of the frequency information of the carrier used thereby and of the trans-carrier scheduling-related information of the carrier, thereby coordinating between the base stations in configuring different scheduling characteristics for a same carrier, thus reducing the co-interference between the base stations.

Description

 Method and device for cell interference management

 Embodiments of the present invention relate to the field of communications technologies, and more particularly, to a method and apparatus for cell interference management. Background technique

 With the introduction of CA (carrier aggregation) technology, a base station can work on multiple carriers at the same time. For example, the base station works on both the carrier fl and the carrier £2, and one of the carriers is called a primary carrier. The carrier scheduled by this carrier is called a secondary carrier. The CA technology uses the PDCCH (Dedicated Physical Control Channel) of the primary carrier to instruct the UE (User Equipment) to obtain scheduling information from the PDSCH (Dedicated Physical Shared Channel) of the secondary carrier, and further expands the scheduling information. The capacity of the system.

 In the scenario where multiple carriers are deployed on an LTE (Long Term Evolution) network, co-channel interference may exist between the base stations. For example, in an LTE network, the frequency of a carrier used by a macro base station (for example, a Macro base station) is fl/f2, and the frequency of a carrier that a small base station (for example, a Pico base station) can also use is fl/f2, and coverage at the Pico base station. Within the range, Pico's UE will be subject to co-channel interference from the macro base station. Especially after the introduction of RE (range extension) technology in the Pico base station, the service area that Pico can cover extends outwards by one area. How to reduce co-channel interference in this area, especially the co-channel interference in the PDCCH region, has been a hot issue in LTE network research.

 In order to reduce co-channel interference, a mechanism for reducing interference time division multiplexing has been proposed, and a scheme for reducing interference from the perspective of time domain has been proposed. In this scheme, the interfering cell selects certain subframes as near blank subframes, and does not transmit signals or reduce transmission power on most time-frequency resource blocks in the subframes, and the UEs of the interfered cells are in these near blanks. The interference of the interfering cell received at the subframe corresponding to the frame is reduced, thereby achieving the purpose of reducing co-channel interference. This method solves the problem of co-channel interference from the perspective of time domain.

However, the time division based solution requires two base stations to negotiate the location of a specific near blank subframe. The signaling interaction between the base stations is large, and the time synchronization accuracy of the base station is also high, so that the same frequency interference cannot be effectively reduced. Summary of the invention Embodiments of the present invention provide a method and apparatus for cell interference management, which can reduce co-channel interference. An aspect of the present invention provides a method for cell interference management, including: generating carrier coordination information, where the carrier coordination information includes frequency information of a carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used for the first The base station and the second base station negotiate the scheduling characteristics of the carrier to reduce co-channel interference of the first base station and the second base station on the carrier; and send the carrier coordination information to the second base station.

 Another method of the present invention provides a method for cell interference management, including: receiving carrier coordination information sent by a first base station, where the carrier coordination information includes frequency information of a carrier and cross-carrier scheduling related information of the carrier, the cross-carrier scheduling The related information is used by the first base station and the second base station to negotiate the scheduling characteristics of the carrier, so as to reduce the co-channel interference of the first base station and the second base station on the carrier, and configure the carrier of the second base station according to the carrier coordination information.

 Another method of the present invention provides a method for cell interference management, including: receiving carrier coordination information from a first base station, where the carrier coordination information includes frequency information of a carrier and cross-carrier scheduling related information of the carrier, the cross-carrier scheduling correlation The information is used by the first base station and the at least one second base station to negotiate scheduling characteristics of the carrier, so as to reduce co-channel interference of the first base station and the at least one second base station on the carrier; and forward the carrier coordination information to the at least one second base station.

 Another method of the present invention provides a cell interference management apparatus, including: a generating module, configured to generate carrier coordination information, where the carrier coordination information includes carrier frequency information and cross-carrier scheduling related information of the carrier, the cross-carrier scheduling The related information is used by the first base station and the second base station to negotiate the scheduling characteristics of the carrier, so as to reduce the co-channel interference of the first base station and the second base station on the carrier, and the sending module is configured to send the carrier coordination information to the second base station.

 Another method of the present invention provides a cell interference management apparatus, including: a receiving module, configured to receive carrier coordination information sent by a first base station, where the carrier coordination information includes carrier frequency information and cross-carrier scheduling related information of the carrier The cross-carrier scheduling related information is used by the first base station and the second base station to negotiate the scheduling characteristics of the carrier, so as to reduce the same-frequency interference of the first base station and the second base station on the carrier; and a configuration module, configured to coordinate information according to the carrier The carrier of the second base station is configured.

The method of the present invention provides a cell interference management apparatus, including: a receiving module, configured to receive carrier coordination information from a first base station, where the carrier coordination information includes frequency information of a carrier and cross-carrier scheduling related information of the carrier, The cross-carrier scheduling related information is used by the first base station and the at least one second base station to negotiate scheduling characteristics of the carrier, so as to reduce co-channel interference of the first base station and the at least one second base station on the carrier; and the forwarding module is configured to A second base station forwards the carrier coordination information. In the embodiment of the present invention, the frequency information of the carrier used by the base station and the cross-carrier scheduling related information of the carrier may be exchanged between the base stations to coordinate different scheduling characteristics between the base stations for the same carrier, thereby reducing co-channel interference between the base stations. . DRAWINGS

 In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative labor.

 1 is a schematic flowchart of a method for J-zone interference management according to an embodiment of the present invention; FIG. 2 is a schematic flowchart of a method for J-zone interference management according to an embodiment of the present invention; FIG. 4 is a schematic flowchart of a method for J-zone interference management according to an embodiment of the present invention; FIG. 5 is a schematic flowchart of an embodiment of the present invention; FIG. 6 is a schematic structural diagram of an apparatus for J and area interference management according to an embodiment of the present invention; FIG. 7 is a J. area interference management provided by an embodiment of the present invention; FIG. 8 is a schematic structural diagram of an apparatus for J-zone interference management according to an embodiment of the present invention. detailed description

 BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

 It should be understood that the technical solution of the present invention can be applied to various communication systems, for example, a Global System of Mobile Communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. WCDMA (Wandaband Code Division Multiple Access) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), etc.

It should also be understood that, in the embodiment of the present invention, the base station may be a base station in GSM (BTS, Base) The Transceiver Station can also be a base station (NB, NodeB) in WCDMA, or an evolved base station (eNB or eNodeB, Evolutional Node B) in LTE, or an access point (AP, Access Point). The embodiment of the present invention will be described by using an LTE heterogeneous network deployed by a macro base station and a small base station as an example, but the embodiment of the present invention is not limited thereto. For example, when the small base station is an RRH (Remote Radio Head), the embodiment of the present invention The same applies. In addition, embodiments of the present invention may also be applied to a homogeneous network.

 In an LTE system, a base station (e.g., an eNodeB) can transmit a PDSCH on a carrier and need to transmit a PDCCH corresponding to the PDSCH. The PDCCH includes information such as resource allocation information, a modulation and coding scheme, and a size of a transport block of the PDSCH corresponding to the scheduling. The PDCCH has two scheduling modes. One is that the PDCCH on one carrier can schedule the PDSCH of the local carrier, and the other is that the PDCCH on one carrier can schedule the PDSCH on other carriers, that is, cross-carrier scheduling.

 According to an embodiment of the present invention, the concept of a scheduling carrier and a scheduled carrier is introduced during cross-carrier scheduling. The PDCCH of the scheduling carrier may schedule the PDSCH of the scheduling carrier itself, or may also schedule the PDSCH of the scheduled carrier, the PDCCH of the scheduled carrier may be empty (no transmission power), or the transmission power of the PDCCH of the scheduled carrier may be lower, thereby It will not cause interference to surrounding base stations. In particular, in a heterogeneous deployment scenario, if a macro base station uses one carrier as the scheduled carrier, and a small base station within the coverage of the macro base station selects the carrier as its own carrier, even as its own scheduling carrier, due to the macro base station. The carrier is used as the scheduled carrier, and the PDCCH region transmit power on the scheduled carrier is 0 or lower, so the interference of the small base station on the PDCCH region on the carrier is low, and the wireless channel of the small base station on the carrier is ensured. Quality, reducing co-channel interference, especially in the RE region. For the same base station, the PDCCH of its scheduled carrier can also be scheduled by the PDCCH of the scheduling carrier, that is, the scheduled PDCCH resource is provided to the PDSCH for use. Since the transmit power of the PDSCH is small, the interference to the surroundings is also low. Thus, while the interference is reduced, the resources corresponding to the vacant PDCCH region are effectively utilized.

The present invention mainly solves the problem of co-channel interference in an LTE network deployment scenario, and introduces a scheduling carrier and a scheduled carrier based on a carrier aggregation technology from a frequency domain perspective to solve the interference problem. According to the embodiment of the present invention, in order to avoid co-channel interference, the carrier configuration between the base stations may be coordinated, so that the scheduling carrier of the interfered base station may be different from the scheduling carrier of the interfering base station, or the scheduling carrier of the interfered base station corresponds to the interfering base station. The carrier is scheduled (ie, the same as the scheduled carrier of the interfering base station). Optionally, if there is a base station using a single carrier, the scheduling carrier of the base station using multiple carriers may also be coordinated. A carrier that is the same as a base station that uses a single carrier, or a coordinated carrier that coordinates a base station that uses multiple carriers, corresponds to a carrier of a base station that uses a single carrier. This requires interaction of carrier information between base stations, especially information exchange of carrier scheduling characteristics. According to an embodiment of the invention, the scheduling characteristic of the carrier is used to indicate whether the base station uses the carrier as the scheduling carrier or the scheduled carrier. A set of scheduled carriers corresponding to one carrier of a base station according to an embodiment of the present invention refers to a set of carriers that can be scheduled by the carrier in the base station. Similarly, a set of scheduling carriers corresponding to one carrier of a base station according to an embodiment of the present invention refers to a set of carriers capable of scheduling the carrier in the base station. The various types of carriers described in all embodiments of the present invention may be "different" or "identical", may be "different" or "identical" to the center frequency of the carrier, or may be "different" or "identical" to the frequency band occupied by the carrier. All types of carrier sets described in all embodiments of the present invention may use carrier frequency band information to identify carriers.

 According to the existing LTE technology, the cells of the base station are all corresponding to one carrier. Therefore, the scheduling carrier or the scheduled carrier described in all embodiments of the present invention may also correspond to the cell of the base station, that is, in practical applications, the present invention refers to The information of the scheduling characteristics of the carriers transmitted between different nodes (for example, the information of one base station configuration carrier and the information requesting another base station configuration carrier) may also be represented by the scheduling characteristics of the cell. The scheduled carrier of the scheduled carrier transmitted between different nodes mentioned in the embodiment of the present invention or the scheduled carrier information of the scheduled carrier (for example, information of one base station configuration carrier and information requesting another base station configuration carrier) may be used by the cell. The scheduled carrier or the scheduled carrier of the cell is represented by the scheduled cell of the cell or the scheduled cell of the cell.

 In the actual communication system, the primary carrier and the scheduled carrier are completely equivalent. In this paper, the modulated carrier can also be extended to the concept of the secondary carrier. Therefore, all embodiments of the present invention are based on the description of the scheduling carrier and the scheduled carrier, and may also be extended to the description of the primary carrier (or Pcell) and the secondary carrier (or Scell).

 FIG. 1 is a schematic flowchart of a method for cell interference management according to an embodiment of the present invention. The method of Figure 1 is performed by a base station. The method includes the following.

 110. Generate carrier coordination information, where the carrier coordination information includes carrier frequency information and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and the second base station to negotiate the scheduling characteristics of the carrier, so as to reduce The first base station and the second base station have co-channel interference on the carrier.

For example, the cross-carrier scheduling related information is used to coordinate different carriers configured by the first base station and the second base station as scheduling carriers for cross-carrier scheduling to reduce co-channel interference between the first base station and the second base station. The frequency information of the carrier according to the embodiment of the present invention may refer to that the frequency band, the frequency point, etc. can be distinguished differently. Carrier frequency information. In other words, the carrier coordination information is used to enable the base station to learn related information of the carrier used by another base station to avoid using the same carrier as another base station as the scheduled carrier for cross-carrier scheduling. Optionally, the carrier coordination information may also prevent the used carrier of the base station using a single carrier from being the same as the scheduled carrier of another base station.

 120. Send the carrier coordination information to the second base station.

 For example, the first base station can exchange the above-described carrier coordination information through a communication interface (e.g., x2 interface) between the first base station and the second base station. Optionally, when there is no direct communication interface between the first base station and the second base station, the first base station and the second base station may also pass through a third-party node, for example, OAM (Operation Administration and Maintenance) Or mobility (mobility management entity) to interact with the above carrier coordination information. Embodiments in accordance with the present invention are not limited thereto, and in what manner the above-described carrier coordination information is exchanged and constitutes a limitation of the present invention.

 In the embodiment of the present invention, the frequency information of the carrier used by the base station and the cross-carrier scheduling related information of the carrier may be exchanged between the base stations to coordinate different scheduling characteristics between the base stations for the same carrier, thereby reducing co-channel interference between the base stations. , especially the co-channel interference in the PDCCH region.

 According to the embodiment of the present invention, the cross-carrier scheduling related information includes indication information, where the indication information is used to indicate whether the carrier is configured or not configured as the scheduling carrier of the first base station or indicates configuration or non-configuration when negotiating the scheduling characteristic of the carrier. This carrier acts as the scheduled carrier of the first base station. For example, indicating that the configuration carrier is used as the scheduling carrier of the first base station means that the second base station cannot use the carrier as the scheduling carrier, and indicating that the carrier is not configured as the scheduling carrier means that the second base station can use the carrier as the scheduling carrier, thereby being able to avoid The first base station and the second base station use the same carrier as the scheduling carrier. In particular, in a case where the first base station uses a single carrier, the indication information may correspond to indication information for indicating that the carrier is configured as a scheduling carrier of the first base station, so as to prevent the second base station from using the carrier as a scheduling carrier.

Optionally, in another embodiment, when the indication information indicates that the carrier is configured as the scheduling carrier of the first base station, the carrier coordination information further includes: a set of scheduled carriers corresponding to the carrier of the first base station; In the case that the indication information indicates that the carrier is not configured as the scheduling carrier of the first base station, the carrier coordination information further includes: a candidate scheduled carrier set corresponding to the carrier used by the second base station; In the case that the carrier is used as the scheduled carrier of the first base station, the carrier coordination information further includes: a set of scheduling carriers corresponding to the carrier of the first base station; If the information indicates that the carrier is not configured as the scheduled carrier of the first base station, the carrier coordination information further includes: a candidate scheduling carrier set corresponding to the carrier used by the second base station. According to an embodiment of the present invention, the foregoing set of scheduling carriers or a set of scheduled carriers may be used to provide a scheduling carrier or a scheduled carrier for the second base station, that is, the second base station may conveniently select an appropriate carrier from the set of carriers according to requirements. As its own carrier, to avoid using the same scheduled carrier as the first base station. In other words, the set of scheduled carriers or the set of scheduled carriers may include frequency information of carriers used by the second base station and scheduling characteristic information of the carriers at the second base station.

 Optionally, as another embodiment, the foregoing cross-carrier scheduling related information includes carrier configuration request information, where the carrier configuration request information is used to request the second base station to configure or not configure the carrier as a scheduling carrier or request the second base station configuration or not. The carrier is configured as a scheduled carrier. For example, requesting the second base station to configure the carrier as the scheduling carrier means that the first base station does not use the carrier as its scheduling carrier, so the second base station can select the carrier as the scheduling carrier, and requesting the second base station not to configure the carrier as the scheduling carrier means The first base station will use the carrier as the scheduling carrier, so the second base station should not select the carrier as the scheduling carrier.

 Optionally, in another embodiment, when the second base station is configured to configure the carrier as the scheduling carrier, the carrier coordination information further includes: a candidate scheduled carrier set corresponding to the carrier used by the second base station; When the second base station is not configured to configure the carrier as the scheduled carrier, the carrier coordination information further includes: a set of scheduled carriers corresponding to the carrier of the first base station; and a request for the second base station to configure the carrier as the scheduled carrier. The carrier coordination information further includes: a candidate scheduling carrier set corresponding to the carrier used by the second base station; where the second base station does not configure the carrier as the scheduled carrier, the carrier coordination information further includes: A set of scheduling carriers corresponding to the carrier of a base station.

Optionally, as another embodiment, in 120, the carrier coordination information is sent to a third-party node, and the carrier coordination information is forwarded by the third-party node to the at least one second base station, where the method further includes: receiving the third party And the acknowledgment information and/or carrier configuration information returned by the node from the at least one second base station, or the intersection of the acknowledgment information and/or carrier configuration information that is filtered by the third party node and returned from the at least one second base station, and according to the The intersection of the acknowledgment information and/or the carrier information configures a carrier of the first base station, the carrier configuration information indicating carrier information of the at least one second base station configuration. According to the embodiment of the present invention, when the third node receives feedback information such as acknowledgment information and/or carrier configuration information returned by the second base station, the third node may filter the feedback information, that is, determine the intersection of the feedback information. (or public information) to feed back the intersection of the above feedback information to the first base station. For example, the intersection of the foregoing feedback information may indicate that a plurality of second base stations may use a certain carrier as the scheduled carrier, so that after receiving the intersection of the feedback information, the first base station may use the carrier as a scheduling carrier, thereby avoiding The first base station generates co-channel interference to the plurality of second base stations. In addition, if multiple second base stations return acknowledgment information to the third node, the third party node may send only one total convincing message to the first base station.

 Optionally, in another embodiment, the method further includes: receiving acknowledgement information and/or carrier configuration information returned by the second base station, where the carrier configuration information is used to indicate carrier information configured by the second base station; / or the carrier configuration information configures the carrier of the first base station. For example, the above confirmation information may indicate whether the second base station receives the carrier coordination information. The carrier information configured by the second base station may include information indicating whether the scheduling characteristics of the carrier configured by the second base station, or whether the second base station configures the carrier according to a request of the base station, or whether to reject the request of the first base station and the reason for the rejection. The first base station may determine whether the carrier is configured as its own scheduling carrier according to the feedback information such as the acknowledgement information and/or the carrier configuration information. Of course, the first base station may also retain the original carrier configuration, thereby providing a more flexible carrier. Configuration method.

 Optionally, in another embodiment, the method further includes: a scheduling carrier or a scheduled carrier of the first base station; or sending a carrier configuration time to the second base station or sending the carrier configuration time to the second base station by using a third-party node, And configuring the carrier as the scheduling carrier or the scheduled carrier of the first base station according to the carrier configuration time, where the carrier configuration time is a time when the first base station configures the carrier. For example, the first base station may first configure the carrier as a scheduling carrier or a scheduled carrier, and then send carrier coordination information, or configure the carrier as a scheduling carrier or a scheduled carrier while transmitting the carrier coordination information. In addition, the first base station may configure the carrier after a period of time. In this case, the first base station may further inform the second base station when the carrier is configured as a scheduling carrier or a scheduled carrier, so that the second base station is configured according to the second base station. Corresponding processing is required, for example, if the second base station performs corresponding configuration before the carrier configuration of the first base station takes effect, to reduce interference caused by carrier configuration unsynchronization. According to an embodiment of the present invention, the first base station may transmit the carrier configuration time by carrier coordination information or other message body.

 Optionally, as another embodiment, the method further includes: receiving a carrier configuration time from the second base station, or receiving, by the third-party node, the carrier configuration time from the second base station, where the carrier configuration time is configured by the second base station time.

Optionally, as another embodiment, the method further includes: interacting with the second base station, the first base station, and/or Or the radio resource occupied by the PDCCH of the carrier of the second base station and/or the radio resource occupied by the PDSCH, or the radio resource occupied by the PDCCH and/or the radio resource occupied by the PDSCH are exchanged with the second base station by the third node, so as to be based on the PDCCH and the PDCCH and / or the occupied radio resource of the PDSCH configures the physical channel of the carrier where the first base station and the second base station are located.

 For example, in downlink transmission, PDCCH and PDSCH are time division multiplexed in one subframe. In the subframe, the PCFICH (Physical Control Format Indicator Channel) indicates the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols occupied by the PDCCH in the subframe. The number of OFDM symbols occupied by the PDCCH. If the second base station needs to use the carrier of the first base station as its own scheduled carrier, the second base station needs to know the number of OFDM symbols occupied by the PDCCH of the first base station on the carrier, so as to correctly configure the carrier where the second base station is located. The physical channel includes the number of occupied OFDM symbols configuring the PDCCH and the number of OFDM symbols occupied by the PDSCH. For example, the first base station uses the carrier as the scheduling carrier, and uses 3 OFDM symbols as the PDCCH, and the remaining symbols are PDSCH. The second base station obtains the information, and selects the carrier as the scheduled carrier, and only the reserved carrier is reserved. The corresponding OFDM symbol is used as the PDSCH, and no signal is transmitted at the OFDM position corresponding to the PDCCH of the first base station. The first base station may notify the second base station of the number of OFDM symbols occupied by the PDCCH of the second base station through the X2 interface /OAM. The PCFICH may also be empty. In this case, the number of OFDM symbols occupied by the PDCCH can be obtained by mutual agreement. Optionally, since the sum of the number of OFDM symbols in one subframe is equal to the sum of the number of occupied OFDM symbols of the PDCCH and the number of OFDM symbols occupied by the PDSCH, the OFDM symbol occupied by the PDSCH in the subframe may also be used. The number determines the number of OFDM symbols occupied by the PDCCH. At this time, the radio resource occupied by the PDSCH, such as the number of OFDM symbols occupied by the PDSCH, is transmitted between the first base station and the second base station. In addition, the second base station may determine the vacated PDCCH radio resources of the scheduled carrier based on the radio resources occupied by the PDCCH of the scheduled carrier, and the radio resources of the vacated PDCCH may be used as the PDSCH, and the corresponding scheduling carrier is used. The PDCCH schedules it. Since the transmit power of the PDSCH is small, the interference to the surrounding is also low. Thus, while ensuring the reduction of interference, the resources corresponding to the vacant PDCCH region are effectively utilized.

According to an embodiment of the invention, the first base station is a macro base station, and the second base station is a small base station, or the first base station is a small base station and the second base station is a macro base station. For example, one base station may not use a scheduling carrier used by another base station, or the scheduling carrier may not be used as the base The station's scheduling carrier avoids collisions between the scheduled carriers between the two base stations.

 FIG. 2 is a schematic flowchart of a method for cell interference management according to an embodiment of the present invention. The method of Fig. 2 is performed by a base station and corresponds to the method of Fig. 1, and a detailed description is omitted as appropriate. The method includes the following.

 210. Receive carrier coordination information sent by the first base station, where the carrier coordination information includes frequency information of the carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and the second base station to negotiate the carrier. Scheduling features to reduce co-channel interference of the first base station and the second base station on the carrier.

 220. Configure a carrier of the second base station according to the carrier coordination information. For example, the second base station may determine whether to use the carrier of the first base station as its carrier according to the cross-carrier scheduling related information included in the carrier coordination information, or may select not to use the carrier of the first base station as its carrier.

 In the embodiment of the present invention, the frequency information of the carrier used by the base station and the cross-carrier scheduling related information of the carrier may be exchanged between the base stations to coordinate different scheduling characteristics between the base stations for the same carrier, thereby reducing co-channel interference between the base stations. , especially the co-channel interference in the PDCCH region. For example, one base station may not use the scheduling carrier used by another base station, or the scheduling carrier is not used as the scheduling carrier of the base station, thereby avoiding collision of the scheduling carriers between the two base stations.

 According to an embodiment of the present invention, the foregoing cross-carrier scheduling related information includes indication information, where the indication information is used to indicate that the carrier is configured or not configured as a scheduling carrier of the first base station, or indicates that the carrier is configured or not configured as the first base station. Scheduling carriers.

 In the case where the carrier is configured as the scheduling carrier of the first base station, the carrier is prohibited from being configured as the scheduling carrier of the second base station; if the carrier is not configured as the scheduling carrier of the first base station, the carrier is configured. As a scheduling carrier of the second base station; when the carrier is configured as the scheduled carrier of the first base station, the carrier is configured as the scheduling carrier of the second base station; when the carrier is not configured as the scheduled carrier of the first base station The carrier is prohibited from being configured as the scheduling carrier of the second base station.

Optionally, in another embodiment, in the case that the carrier is configured as the scheduling carrier of the first base station, the carrier coordination information further includes: a set of scheduled carriers corresponding to the carrier of the first base station, The second base station configures the carrier as the scheduled carrier, and/or configures one or more carriers in the set of scheduled carriers corresponding to the carrier of the first base station as the scheduling carrier; if the carrier is not configured as the first base station In the case of scheduling a carrier, the carrier coordination information further includes: providing a second base station a candidate set of scheduled carriers corresponding to the carrier, wherein the second base station configures the carrier as a scheduling carrier, and/or configures one or more of a set of candidate scheduled carriers corresponding to the carrier used by the second base station The carrier is used as the scheduled carrier. In the case that the carrier is configured as the scheduled carrier of the first base station, the carrier coordination information further includes: a set of scheduling carriers corresponding to the carrier of the first base station, where the second base station configures the carrier as the carrier Scheduling a carrier, and/or configuring one or more carriers in the set of scheduling carriers corresponding to the carrier of the first base station as the scheduled carrier; if the carrier is not configured as the scheduled carrier of the first base station, the carrier The coordination information further includes: a candidate scheduling carrier set corresponding to the carrier used by the second base station, where the second base station configures the carrier as the scheduled carrier, and/or configures a candidate scheduling corresponding to the carrier used by the second base station One or more carriers in the set of carriers serve as scheduling carriers.

 Optionally, in another embodiment, the foregoing cross-carrier scheduling related information further includes: a carrier configuration request, configured to request the second base station to configure or not configure the carrier as a scheduling carrier, or request the second base station to configure or not configure the carrier as The carrier is scheduled.

 In 220, when the second base station is configured to configure the carrier as the scheduling carrier, the carrier is configured as the scheduling carrier of the second base station; and when the second base station is not configured to configure the carrier as the scheduling carrier, the carrier is prohibited from being configured. As a scheduling carrier of the second base station; if the second base station is configured to configure the carrier as the scheduled carrier, the carrier is configured as the scheduled carrier of the second base station; and the second base station is not configured to configure the carrier as the scheduled carrier. In this case, it is forbidden to configure the carrier as the scheduled carrier of the second base station.

Optionally, in another embodiment, when the second base station is configured to configure the carrier as the scheduling carrier, the carrier coordination information further includes: a candidate scheduled carrier set corresponding to the carrier used by the second base station, where The second base station configures one or more carriers in the candidate scheduled carrier set corresponding to the carrier used by the second base station as the scheduled carrier of the second base station; and when the second base station is requested not to configure the carrier as the scheduling carrier The carrier coordination information further includes: a set of scheduled carriers corresponding to the carrier of the first base station, where the second base station configures the carrier as a scheduled carrier of the second base station, and/or configures the first base station with the carrier One carrier of the corresponding scheduled carrier set is used as the scheduling carrier of the second base station; in the case that the second base station is configured to configure the carrier as the scheduled carrier, the carrier coordination information further includes: the carrier used by the second base station Corresponding candidate scheduling carrier set, wherein the second base station configures a candidate tone corresponding to the carrier used by the second base station One carrier in the set of degrees of carrier is used as the scheduling carrier of the second base station; the second base station is not configured to be configured as the called In the case of a carrier, the carrier coordination information further includes: a set of scheduling carriers corresponding to the carrier of the first base station, where the second base station configures the carrier as a scheduling carrier of the second base station, and/or configures a corresponding to the carrier One or more carriers in the set of carrier are scheduled as the scheduled carriers of the second base station.

 Optionally, in another embodiment, in 210, the receiving carrier coordination information sent by the first base station includes: receiving, from a third-party node, carrier coordination information received by the third-party node from the first base station, where the method further includes Transmitting, by the third party node, acknowledgment information and/or carrier configuration information to the first base station, the carrier configuration information indicating carrier information configured by the second base station.

 Optionally, as another embodiment, the method further includes: returning, to the first base station, acknowledgement information and/or carrier configuration information, where the carrier configuration information is used to indicate carrier information configured by the second base station.

 Optionally, as another embodiment, the method further includes: returning acknowledgement information and/or carrier configuration information to the first base station after configuring the carrier of the second base station according to the carrier coordination information; or sending the information to the first base station The carrier configuration time or the third-party node sends the carrier configuration time to the first base station, and configures the carrier as the scheduling carrier or the scheduled carrier of the second base station according to the carrier configuration time, where the carrier configuration time is configured by the second base station. time. For example, the second base station may transmit the carrier configuration time by an acknowledgement message or other message body. For example, the second base station may first configure the carrier as a scheduling carrier or a scheduled carrier, and then send the carrier configuration time, or configure the carrier as a scheduling carrier or a scheduled carrier while transmitting the carrier configuration time. In addition, the second base station may configure the carrier after a period of time. In this case, the second base station may further inform the first base station when the carrier is configured as a scheduling carrier or a scheduled carrier, so that the first base station performs the Corresponding processing, for example, the first base station performs corresponding configuration before the carrier configuration of the second base station takes effect, so as to reduce interference caused by the carrier configuration being out of synchronization.

 Optionally, as another embodiment, the method further includes: receiving a carrier configuration time from the first base station, or receiving, by the third-party node, the carrier configuration time from the first base station, where the carrier configuration time is configured by the first base station time.

Optionally, as another embodiment, the method further includes: interacting with the first base station, the radio resource occupied by the physical downlink control channel of the carrier of the first base station and/or the second base station, and/or the wireless occupied by the physical downlink shared channel Recovering, by the third node, the radio resource occupied by the physical downlink control channel and/or the radio resource occupied by the physical downlink shared channel, and the radio resource occupied by the physical downlink control channel and/or the physical resource. The radio resource occupied by the downlink shared channel configures the physical channel of the carrier where the first base station and the second base station are located. According to an embodiment of the invention, the first base station is a macro base station and the second base station is a small base station, or the first base station is a small base station and the second base station is a macro base station.

 Embodiments of the present invention are described in more detail below with reference to specific examples. FIG. 3 is a schematic flowchart of a cell interference management process according to an embodiment of the present invention. Figure 3 is an example of the method of Figures 1 and 2. In FIG. 3, the source base station may be a macro base station, for example, an eNodeB, and the opposite base station may be a small base station, for example, a Pico base station, but the present invention is not limited to the specific system represented by the term, but may be similarly applied to other forms. Base station. In the embodiment of the present invention, the first base station may also be referred to as a source base station, and the second base station may also be referred to as a peer base station.

 310. The source base station generates carrier coordination information, where the carrier coordination information includes frequency information of a carrier of the source base station and cross-carrier scheduling related information of the carrier. The cross-carrier scheduling related information is used by the source base station and the opposite base station to negotiate the scheduling characteristics of the carrier. For example, different carriers are configured as the scheduling carrier for the source base station and the opposite base station for cross-carrier scheduling, so as to reduce the source base station and the opposite base station. Co-channel interference.

For example, the carrier coordination information may include one of the following situations: 1) a carrier fl used by a source base station (for example, a macro base station) and indication information, which is used to indicate that the carrier fl is a scheduled carrier that is scheduled across carriers; 2) the source base station The used carrier fl and the indication information are used to indicate that the carrier fl is a scheduled carrier scheduled for cross-carrier scheduling; 3) the source base station requests the carrier fl and the indication information used by the opposite base station (for example, the small base station), and is used to indicate that the carrier is desired a scheduling carrier for the cross-carrier scheduling of the opposite base station; 4) the source station requests the carrier fl and the indication information used by the opposite base station, and is used to indicate the scheduled carrier that is required to be the cross-carrier scheduling of the opposite base station; 5) The carrier fl and the indication information used by the base station are used to indicate that the carrier is a cross-carrier scheduled scheduling carrier, and a set of scheduled carriers corresponding to the scheduling carrier; 6) a carrier fl used by the source base station and indication information, used to indicate the The carrier is a scheduled carrier that is scheduled across carriers, and a set of scheduling carriers corresponding to the scheduled carrier; 7) the source base station requests the opposite base station to make The carrier fl and the indication information are used to indicate a scheduling carrier that is required to be the cross-carrier scheduling of the opposite base station, and a scheduled carrier set corresponding to the scheduling carrier; 8) the source base station requests the carrier fl and the used base station The indication information is used to indicate a scheduled carrier that is required to be a cross-carrier scheduling of the opposite base station, and a set of scheduling carriers corresponding to the scheduled carrier. The embodiment of the present invention is not limited thereto. For example, the source base station may report to the peer base station that the carrier fl is not used as the cross-carrier scheduling scheduling carrier or the scheduled carrier by using the cross-carrier scheduling related information, or the source base station may The foregoing cross-carrier scheduling related information is used to request the opposite base station not to use the carrier fl as a scheduling carrier or a scheduled carrier for cross-carrier scheduling. 320. The source base station sends the foregoing carrier coordination information to the opposite base station.

 For example, the source base station may report the frequency information of its own carrier and the cross-carrier scheduling related information of the carrier to the surrounding base station (especially the small base station) when preparing the carrier or after configuring the carrier, so as to coordinate the carrier configuration of the opposite base station. , thereby reducing co-channel interference to surrounding base stations.

 330. Configure a carrier of the opposite base station according to the carrier coordination information.

 For example, when the opposite base station (especially a small base station) receives the above carrier coordination information, it further coordinates its own carrier configuration.

 Specifically, if the small base station learns that the macro base station uses the carrier fl as the scheduling carrier according to the information in the above case 1), the small base station does not select to use the carrier fl to perform the RE, or does not use the carrier fl as its own scheduling. Carrier, otherwise, the PDCCH of the UE in the RE area of the small base station is interfered by the PDCCH of the carrier fl from the macro base station.

 If the small base station learns from the information of the above case 2) that the macro base station uses the carrier fl as the scheduled carrier, the small base station may select to use the carrier fl to perform RE or use the carrier fl as its own scheduled carrier. In this case, since the PDCCH of the macro base station fl does not transmit power or the transmission power is low, the PDCCH of the UE in the small base station RE area is less affected by the PDCCH interference of the carrier fl from the macro base station, thereby ensuring the PDCCH of the small base station. Wireless link quality.

 Upon receiving the information of the above case 3) or 4), the small base station can configure the carrier required by the macro base station and the function of the carrier in the cross-carrier scheduling according to the request of the macro base station. For example, if the macro base station requests the small base station to use the carrier fl and it is desired that the carrier is a scheduled carrier for the cross-carrier scheduling of the small base station, the small base station can use the carrier fl as the scheduled carrier for cross-carrier scheduling. If the macro base station requests the carrier fl used by the small base station, and the carrier is expected to be a scheduled carrier for cross-carrier scheduling of the small base station, the small base station can use the carrier fl as the scheduled carrier for cross-carrier scheduling. Of course, the small base station can also choose to use other carriers according to its carrier aggregation capability and selectable resources.

The UE provides the service. Optionally, the small base station may also not modify any carrier configuration according to the current capacity requirement of the UE.

Similarly, when the information of one of the above cases 5) to 8) is received, the processing of the small base station is similar to the above process. The difference is that the above cases 1) to 4) respectively provide the information of the available scheduling carrier or the scheduled carrier for the small base station, and the above cases 5) to 8) respectively provide the optional scheduling carrier for the small base station. And information of the scheduled carrier. For example, for case 5), if the small base station learns that the macro base station uses the carrier fl and the carrier is a cross-carrier scheduled scheduling carrier and the tone For the set of scheduled carriers corresponding to the carrier, the small base station uses the carrier fl as the scheduled carrier, and selects the carrier as the scheduling carrier of the small base station from the set of scheduled carriers corresponding to the scheduled carrier, so that the small base station and the macro base station use different The carrier is used as the scheduling carrier. For other cases, reference may be made to the methods of FIG. 1 and FIG. 2, and details are not described herein again.

 In addition, the carrier coordination message may also carry the PDCCH and/or the radio resource occupied by the PDSCH, so that the peer base station can correctly configure the physical channel of the carrier where the source base station is used. The radio resource may be the number of OFDM symbols.

 340. The peer base station returns feedback information to the source base station.

 According to an embodiment of the present invention, the feedback information may include acknowledgement information and/or carrier configuration information. After receiving the carrier coordination information, the peer base station (especially the small base station) may feed back the acknowledgement information, for example, the acknowledgement information is used to confirm receipt of the carrier coordination information. Optionally, as another embodiment of the present invention, after receiving the carrier coordination information, the peer base station (especially the small base station) may also feed back carrier configuration information, which is used to indicate carrier information configured by the opposite base station, where the carrier The configuration information may include a carrier used by the peer base station. Optionally, the carrier information may further include information that the carrier is a scheduled carrier or a scheduled carrier. Optionally, the foregoing carrier configuration information may further include: whether to select a carrier requested or suggested by the macro base station as the scheduled carrier or the scheduling carrier, or feedback the information rejecting the request or the recommendation, and rejecting the request or the suggestion, for example, the current small When the resources of the base station can meet the capacity requirements of the UE, it is not necessary to change the carrier configuration. 340 may be omitted in accordance with an embodiment of the present invention.

 In this embodiment, the macro base station may include multiple small base stations. To meet the capacity requirements of the small base stations, for example, the macro base station may configure one carrier configuration as the scheduled carrier for self-carrier scheduling, and actively initiate the above-mentioned cross-based Carrier resource coordination process for carrier scheduling. In this way, all small base stations can share the scheduled carrier as the carrier for RE or use this carrier as the scheduling carrier, thereby reducing or even avoiding co-channel interference.

 According to another embodiment of the present invention, the source base station may be a small base station, and the opposite base station may be an ao base station. In this embodiment, the small base station may be in the re-covering area of the multiple macro base stations, and may actively initiate the carrier resource coordination process based on the cross-carrier scheduling. The process is similar to the process in FIG. 3, and details are not described herein again.

 According to another embodiment of the present invention, the source base station and the opposite base station may also be both macro base stations.

In the foregoing embodiment of the present invention, frequency information of a carrier and information indicating that the carrier is a scheduled carrier or a scheduled carrier are exchanged between the source base station and the opposite base station. According to another embodiment of the present invention, a source base The station and the opposite base station can configure the carrier at different times. In addition, the time when the source base station can interact with the opposite base station, that is, the carrier configuration time (the time when the base station configures the carrier), so that the base station can perform corresponding processing according to the time when the carrier is effective.

 For example, in an embodiment of the present invention, for the above cases 1), 2), 5), and 6), the source base station may configure the scheduling carrier or the scheduled carrier before 330 of FIG. 3, or perform the 330 of FIG. The scheduling carrier or the scheduled carrier is configured at the same time, or the scheduling carrier or the scheduled carrier is configured after 340 of FIG. Optionally, as another embodiment, the source base station may carry the carrier configuration time in 330 of FIG. 3 or through other message bodies (for example, by using a timer) to notify the opposite base station source base station to configure the scheduling carrier or the scheduled carrier. time. The peer base station performs corresponding processing according to the time at which the macro base station configures the scheduled carrier or the scheduled carrier.

 For example, for the above cases 3), 4), 7) and 8), the opposite base station can configure the scheduled carrier or the scheduled carrier at the same time as or before the execution 340. Alternatively, the peer base station can carry the carrier configuration time (e.g., using a timer) in 340 of Figure 3 or through other message bodies to inform the source base station of the time at which the base station configures the scheduled carrier or the scheduled carrier. The source base station performs corresponding processing according to the time at which the opposite base station configures the scheduling carrier or the scheduled carrier.

 The foregoing embodiment of the present invention performs a carrier resource coordination process for cross-carrier scheduling between base stations. For example, the eNodeBs exchange the carrier coordination information through a communication interface (for example, an X2 interface). However, in a wireless communication system, there may be no direct communication interface between the two base stations, and a third party is required to coordinate, such as coordinating the available carriers of each base station and the cross-carrier scheduling related information of the carrier through OAM or MME.

 FIG. 4 is a schematic flowchart of a method for cell interference management according to an embodiment of the present invention. The method of Figure 4 is performed by a third node. The method includes the following.

 410. Receive carrier coordination information from a first base station, where the carrier coordination information includes frequency information of a carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and the at least one second base station to negotiate the carrier. Scheduling feature to reduce co-channel interference of the first base station and the at least one second base station on the carrier.

 420. Forward the carrier coordination information to the at least one second base station.

According to an embodiment of the present invention, in order to be able to apply the present invention in a network without a direct communication interface between base stations, carrier coordination information may be exchanged by a third party node to coordinate different scheduling characteristics between base stations for the same carrier configuration, Thereby reducing co-channel interference between base stations. According to an embodiment of the invention, the method further comprises: receiving acknowledgment information and/or carrier configuration information from the at least one second base station and forwarding to the first base station, or receiving carrier configuration information from the at least one second base station, determining by screening Acknowledgement of the intersection of the information and/or carrier configuration information, and transmitting an intersection of the acknowledgement information and/or carrier configuration information to the first base station, wherein the carrier configuration information indicates carrier information configured by the second base station.

 FIG. 5 is a schematic flowchart of a process of cell interference management according to an embodiment of the present invention. Fig. 5 is an example of Fig. 4. 510 and 530 of Fig. 5 are similar to 310 and 330 of Fig. 3 and will not be described again.

 510. The source base station generates carrier coordination information, where the carrier coordination information includes a carrier of the source base station and cross-carrier scheduling related information of the carrier.

 515. The source base station sends the foregoing carrier coordination information to a third-party node. For example, the macro base station transmits the above carrier coordination information to the OAM or the MME.

 525. The third-party node forwards the foregoing carrier coordination information to the at least one opposite base station. For example, after receiving the carrier coordination information sent by the macro base station, the OAM or the MME forwards the carrier coordination information to at least one opposite base station (for example, a small base station).

 530. Configure a carrier of the opposite base station according to the carrier coordination information.

 540. The at least one opposite base station returns acknowledgment information and/or carrier configuration information to the third-party node. The acknowledgment information and/or carrier configuration information fed back to the third-party node in 540 is similar to the acknowledgment information and/or carrier configuration information fed back to the source base station in 340 of FIG. 3, and details are not described herein again.

 545. The third-party node filters the acknowledgement information and/or carrier configuration information received from the at least one opposite base station to determine an intersection of the acknowledgement information and/or the carrier configuration information. For example, the third-party node may filter the acknowledgement information and/or the carrier configuration information fed back by the multiple base stations to one source base station, and feed back the intersection of the acknowledgement information and/or the carrier configuration information of the multiple peer base stations to the source base station. So that the source base station can perform corresponding processing. For example, only if the intersection indicates that all the opposite base stations can use a certain carrier of the source base station as the scheduled carrier, the source base station uses the carrier as the scheduling carrier.

555. The third-party node forwards the acknowledgement information and/or the carrier configuration information to the source base station or sends the foregoing. For example, the third-party node may forward the acknowledgement information and/or the carrier configuration information to the source base station. Optionally, in the case of multiple base stations, the intersection of the acknowledgment information and/or carrier configuration information returned by the selected at least one base station may be sent to the source base station. According to another embodiment of the present invention, the source base station and the opposite base station may configure carriers at different times. In addition, the source base station may also perform an interaction time between the third-party node and the opposite base station, that is, the base station configures the carrier. Time, so that the base station can perform corresponding processing according to the time when the carrier is effective. For a detailed description, refer to the process of FIG. 4, and details are not described herein again.

 According to an embodiment of the present invention, the source base station may be one of a macro base station and a small base station, and the opposite base station may also be one of a macro base station and a small base station.

 The method for cell interference management according to an embodiment of the present invention has been described above, and the apparatus for cell interference management according to an embodiment of the present invention will be described below with reference to FIGS. 6 to 8, respectively.

 FIG. 6 is a schematic structural diagram of an apparatus 600 for cell interference management according to an embodiment of the present invention. An example of a device 600 is a base station, including a generation module 610 and a transmission module 620. For example, the generation module 610 can be a processor and the transmission module 620 can be an interface.

 The generating module 610 generates carrier coordination information, where the carrier coordination information includes frequency information of the carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and the second base station to negotiate the scheduling characteristics of the carrier, The co-channel interference of the first base station and the second base station on the carrier is reduced. The sending module 620 sends the carrier coordination information to the second base station.

 In the embodiment of the present invention, the frequency information of the carrier used by the base station and the cross-carrier scheduling related information of the carrier may be exchanged between the base stations to coordinate different scheduling characteristics between the base stations for the same carrier, thereby reducing the same frequency between the base stations. interference.

 According to the embodiment of the present invention, the cross-carrier scheduling related information includes indication information, where the indication information is used to indicate whether the carrier is configured or not configured as the scheduling carrier of the first base station or indicates configuration or non-configuration when negotiating the scheduling characteristic of the carrier. This carrier acts as the scheduled carrier of the first base station.

 Optionally, as another embodiment, the foregoing cross-carrier scheduling related information includes carrier configuration request information, where the carrier configuration request information is used to request the second base station to configure or not configure the carrier as a scheduling carrier or request the second base station configuration or not. The carrier is configured as a scheduled carrier.

 Optionally, as another embodiment, the method further includes: a receiving module 630 and a configuration module 640. The receiving module 630 receives the acknowledgment information and/or carrier configuration information returned by the second base station, the carrier configuration information being used to indicate carrier information configured by the second base station. The configuration module 640 configures the carrier of the first base station according to the acknowledgement information and/or the carrier configuration information. Receive module 630 can be an interface and configuration module 640 can be a processor.

Optionally, as another embodiment, the sending module 620 is further configured to send the carrier to the third-party node. Coordinating the information, and the carrier coordination information is forwarded by the third party node to the at least one second base station. The device 600 further includes: a receiving module 630. The receiving module 630 receives the acknowledgment information and/or carrier configuration information that is forwarded by the third-party node and is returned from the at least one second base station, or is used to receive the acknowledgment information and/or carrier that is filtered by the third-party node and returned from the at least one second base station. The intersection of the configuration information, wherein the configuration module 64 configures the carrier of the first base station according to the intersection of the acknowledgement information and/or the carrier information, where the carrier configuration information indicates the carrier information configured by the at least one second base station.

 Optionally, as another embodiment, the apparatus 600 further includes: a configuration module 640. The configuration module 640 configures the carrier as the scheduling carrier or the scheduled carrier of the first base station before or simultaneously transmitting the carrier coordination information to the second base station.

 Optionally, as another embodiment, the sending module 620 further sends a carrier configuration time to the second base station or sends the carrier configuration time to the first base station by using a third-party node. Apparatus 600 also includes: a configuration module 640. The configuration module 640 configures the carrier as the scheduling carrier or the scheduled carrier of the first base station according to the carrier configuration time, where the carrier configuration time is the time when the first base station configures the carrier.

 Optionally, as another embodiment, the apparatus 600 further includes: a receiving module 630. The receiving module 630 receives the carrier configuration time from the second base station, or receives the carrier configuration time from the second base station by using a third-party node, where the carrier configuration time is the time at which the second base station configures the carrier.

 Optionally, as another embodiment, the apparatus 600 further includes: an interaction module 650. The interaction module 650 interacts with the second base station to access the radio resources occupied by the physical downlink control channel of the carrier of the first base station and/or the second base station, and/or the radio resources occupied by the physical downlink shared channel, or interact with the second base station through the third node. The radio resource occupied by the physical downlink control channel and/or the radio resource occupied by the physical downlink shared channel, so that the first base station and the second base station are configured according to the physical downlink control channel and/or the radio resource occupied by the physical downlink shared channel. The physical channel of the carrier.

 The operation and function of the various modules of device 600 can be referred to 110 and 120 of the method of Figure 1 above. In order to avoid repetition, it will not be described here.

 FIG. 7 is a schematic structural diagram of an apparatus 700 for cell interference management according to an embodiment of the present invention. An example of a device 700 is a base station, comprising: a receiving module 710 and a configuration module 720. For example, receiving module 710 can be a processor and configuration module 720 can be an interface.

The receiving module 710 receives carrier coordination information sent by the first base station, where the carrier coordination information includes frequency information of the carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and the second base station to negotiate the carrier. Scheduling feature to reduce the first base station and the second base station in the Co-channel interference of the carrier. The configuration module 720 configures the carrier of the second base station according to the carrier coordination information. In the embodiment of the present invention, the frequency information of the carrier used by the base station and the cross-carrier scheduling related information of the carrier may be exchanged between the base stations to coordinate different scheduling characteristics between the base stations for the same carrier, thereby reducing the same frequency between the base stations. interference

 According to an embodiment of the present invention, the foregoing cross-carrier scheduling related information includes indication information, where the indication information is used to indicate that the carrier is configured or not configured as a scheduling carrier of the first base station, or indicates that the carrier is configured or not configured as the first base station. Scheduling a carrier, wherein the configuration module 720, when configuring the carrier as the scheduling carrier of the first base station, prohibits configuring the carrier as the scheduling carrier of the second base station; if the carrier is not configured as the scheduling carrier of the first base station, The carrier is configured as a scheduling carrier of the second base station; when the carrier is configured as the scheduled carrier of the first base station, the carrier is configured as a scheduling carrier of the second base station; and the carrier is not configured as the first base station. In the case of a carrier, the carrier is prohibited from being configured as a scheduling carrier of the second base station.

 According to an embodiment of the present invention, the cross-carrier scheduling related information further includes: the foregoing cross-carrier scheduling related information further includes: a carrier configuration request, configured to request the second base station to configure or not configure the carrier as a scheduling carrier or request a second base station configuration or The carrier is not configured as the scheduled carrier, where the configuration module 720, when requesting the second base station to configure the carrier as the scheduling carrier, configures the carrier as the second base station when the second base station is configured to configure the carrier as the scheduling carrier. Scheduling a carrier; if the second base station is not configured to configure the carrier as the scheduling carrier, the carrier is prohibited from being configured as the scheduling carrier of the second base station; and when the second base station is configured to configure the carrier as the scheduled carrier, configuring the carrier As the scheduled carrier of the second base station; if the second base station is not required to configure the carrier as the scheduled carrier, the carrier is prohibited from being configured as the scheduled carrier of the second base station.

 Optionally, as another embodiment, the apparatus 700 further includes: a sending module 730. The sending module 730 returns acknowledgment information and/or carrier configuration information to the first base station, where the carrier configuration information is used to indicate carrier information configured by the second base station. Transmit module 730 can be an interface.

 The operation and function of the various modules of device 700 can be referred to 210 and 220 of the method of Figure 2 above. In order to avoid repetition, it will not be described here.

 FIG. 8 is a schematic structural diagram of an apparatus 800 for cell interference management according to an embodiment of the present invention. An example of a device 800 is an OAM or MME, including: a receiving module 810 and a forwarding module 820. For example, receiving module 810 and forwarding module 820 can be interfaces.

The receiving module 810 receives carrier coordination information from the first base station, where the carrier coordination information includes a carrier Frequency information and cross-carrier scheduling related information of the carrier, the cross-carrier scheduling related information is used by the first base station and the at least one second base station to negotiate scheduling characteristics of the carrier, to reduce the first base station and the at least one second base station in the carrier Co-channel interference. The forwarding module 820 forwards the carrier coordination information to the at least one second base station.

 According to an embodiment of the present invention, in order to be able to apply the present invention in a network without a direct communication interface between base stations, carrier coordination information may be exchanged by a third party node to coordinate different scheduling characteristics between base stations for the same carrier configuration, Thereby reducing co-channel interference between base stations.

 The operation and function of the various modules of device 800 can be referred to 410 and 420 of the method of Figure 4 above. In order to avoid repetition, it will not be described here.

 A communication system according to an embodiment of the present invention may include the above-described apparatus 600, 700 or 800.

 Among the base stations, especially between the macro base station and the small base stations within its coverage, the coordinated carriers and these carriers are scheduled carriers or scheduled carriers in the cross-carrier scheduling method. With appropriate coordination, the same carrier is configured in different neighboring base stations with different scheduling characteristics, which reduces interference in the same frequency or RE scenario. The application scenario of this embodiment may not be limited, and the types of two base stations that perform coordination are not limited to macro base stations and small base stations. The technical solution provided by this embodiment can avoid collisions between scheduled carriers used by different base stations, and achieve effective interference coordination.

 Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, for clarity of hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

 A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or Some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

 The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

 The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request A method for cell interference management, comprising:  Generating carrier coordination information, where the carrier coordination information includes frequency information of the carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and the second base station to negotiate the scheduling characteristics of the carrier, The same channel interference of the first base station and the second base station on the carrier is reduced;  Transmitting the carrier coordination information to the second base station.  The method according to claim 1, wherein the cross-carrier scheduling related information includes indication information, where the indication information is used to indicate whether the carrier is configured or not configured when the scheduling characteristic of the carrier is negotiated. The scheduling carrier of the first base station indicates whether the carrier is configured or not configured as the scheduled carrier of the first base station.  3. The method of claim 2, wherein  In the case that the indication information indicates that the carrier is configured as the scheduling carrier of the first base station, the carrier coordination information further includes: a set of scheduled carriers corresponding to the carrier of the first base station; or  In the case that the indication information indicates that the carrier is not configured as the scheduling carrier of the first base station, the carrier coordination information further includes: a candidate scheduled carrier corresponding to the carrier used by the second base station Collection; or  In the case that the indication information indicates that the carrier is configured as the scheduled carrier of the first base station, the carrier coordination information further includes: a scheduling carrier set corresponding to the carrier of the first base station; or  In the case that the indication information indicates that the carrier is not configured as the scheduled carrier of the first base station, the carrier coordination information further includes: a candidate scheduling carrier corresponding to the carrier used by the second base station set.  The method according to claim 1, wherein the cross-carrier scheduling related information includes carrier configuration request information, where the carrier configuration request information is used to request the second base station to configure or not to configure the carrier as Scheduling a carrier or requesting the second base station to configure or not to configure the carrier as a scheduled carrier. 5. The method of claim 4, wherein In the case that the second base station is configured to configure the carrier as a scheduling carrier, the carrier coordination information further includes: a candidate scheduled carrier set corresponding to the carrier used by the second base station; or  In the case that the second base station is not configured to configure the carrier as the scheduling carrier, the carrier coordination information further includes: a set of scheduled carriers corresponding to the carrier of the first base station; or  In the case that the second base station is configured to configure the carrier as the scheduled carrier, the carrier coordination information further includes: a candidate scheduling carrier set corresponding to the carrier used by the second base station; or  And in the case that the second base station is not configured to configure the carrier as the scheduled carrier, the carrier coordination information further includes: a scheduling carrier set corresponding to the carrier of the first base station.  The method according to any one of claims 1 to 5, wherein the transmitting the carrier coordination information to the second base station comprises: transmitting the carrier coordination information to a third node, and The third-party node forwards the carrier coordination information to the at least one second base station, where the method further includes:  Receiving acknowledgement information and/or carrier configuration information returned by the third party node from the at least one second base station, or  Receiving, by the third party node, an intersection of acknowledgment information and/or carrier configuration information returned from the at least one second base station, and configuring the first base station according to an intersection of the acknowledgment information and/or carrier information a carrier, the carrier configuration information indicating carrier information configured by the at least one second base station.  The method according to any one of claims 1 to 5, further comprising: receiving acknowledgement information and/or carrier configuration information returned by the second base station, where the carrier configuration information is used to indicate Carrier information configured by the second base station;  And configuring a carrier of the first base station according to the acknowledgement information and/or the carrier configuration information. 8. The method of claim 2 or 3, further comprising:  Configuring the carrier as a scheduling carrier or a scheduled carrier of the first base station before or simultaneously transmitting the carrier coordination information to the second base station; or Transmitting a carrier configuration time to the second base station or transmitting the carrier configuration time to the second base station by using a third-party node, and configuring the carrier as the scheduling carrier of the first base station according to the carrier configuration time or Scheduling a carrier, wherein the carrier configuration time is configured for the first base station Carrier time.  The method according to claim 4 or 5, further comprising:  Receiving a carrier configuration time from the second base station, or  The carrier configuration time is received by the third base station from the second base station, wherein the carrier configuration time is a time at which the second base station configures a carrier.  The method according to any one of claims 1 to 9, further comprising: interacting with the second base station to physically downlink the carrier of the first base station and/or the second base station The radio resource occupied by the control channel and/or the radio resource occupied by the physical downlink shared channel, or the third node and the second base station interact with the radio resource occupied by the physical downlink control channel or the physical downlink shared channel a radio resource, configured to configure a physical channel of a carrier where the first base station and the second base station are located according to the physical downlink control channel and/or the radio resource occupied by the physical downlink shared channel.  The method according to any one of claims 1 to 10, wherein the first base station is a macro base station and the second base station is a small base station, or the first base station is the small base station The base station and the second base station are the macro base stations.  12. A method for cell interference management, comprising:  Receiving carrier coordination information sent by the first base station, where the carrier coordination information includes frequency information of the carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and the second base station to negotiate Scheduling characteristics of the carrier to reduce co-channel interference of the first base station and the second base station on the carrier;  And configuring a carrier of the second base station according to the carrier coordination information.  The method according to claim 12, wherein the cross-carrier scheduling related information includes indication information, where the indication information is used to indicate that the carrier is configured or not configured as a scheduling carrier of the first base station or Instructing to configure or not to configure the carrier as the scheduled carrier of the first base station,  The configuring the carrier of the second base station according to the carrier coordination information includes: when configuring the carrier as the scheduling carrier of the first base station, prohibiting configuring the carrier as a scheduling of the second base station Carrier; or If the carrier is not configured as the scheduling carrier of the first base station, configuring the carrier as a scheduling carrier of the second base station; or When the carrier is configured as the scheduled carrier of the first base station, configuring the carrier as a scheduling carrier of the second base station; or  When the carrier is not configured as the scheduled carrier of the first base station, configuring the carrier as the scheduling carrier of the second base station is prohibited.  14. The method of claim 13 wherein:  In the case that the carrier is configured as the scheduling carrier of the first base station, the carrier coordination information further includes: a set of scheduled carriers corresponding to the carrier of the first base station, where the second base station is configured Using the carrier as a scheduled carrier, and/or configuring one or more carriers in the set of scheduled carriers corresponding to the carrier of the first base station as a scheduling carrier; or  In the case that the carrier is not configured as the scheduling carrier of the first base station, the carrier coordination information further includes: a candidate scheduled carrier set corresponding to the carrier used by the second base station, where The second base station configures the carrier as a scheduling carrier, and/or configures one or more carriers in the set of candidate scheduled carriers corresponding to the carrier used by the second base station as a scheduled carrier; or  In the case that the carrier is configured as the scheduled carrier of the first base station, the carrier coordination information further includes: a scheduling carrier set corresponding to the carrier of the first base station, where the second base station configuration Using the carrier as a scheduling carrier, and/or configuring one or more carriers in the set of scheduling carriers corresponding to the carrier of the first base station as a scheduled carrier; or  In the case that the carrier is not configured as the scheduled carrier of the first base station, the carrier coordination information further includes: a candidate scheduling carrier set corresponding to the carrier used by the second base station, where The second base station configures the carrier as a scheduled carrier, and/or configures one or more carriers in the set of candidate scheduling carriers corresponding to the carrier used by the second base station as a scheduling carrier.  The method according to claim 12, wherein the cross-carrier scheduling related information further includes: a carrier configuration request, configured to request the second base station to configure or not configure the carrier as a scheduling carrier or a requesting station. The second base station configures or does not configure the carrier as a scheduled carrier,  The configuring the carrier of the second base station according to the carrier coordination information includes: configuring the carrier as the scheduling carrier of the second base station, when the second base station is configured to configure the carrier as a scheduling carrier ; or In the case that the second base station is requested not to configure the carrier as a scheduling carrier, the configuration is prohibited. Said carrier as a scheduling carrier of said second base station; or  And configuring the carrier to be the scheduled carrier of the second base station, when the second base station is configured to configure the carrier as the scheduled carrier; or  In the case that the second base station is requested not to configure the carrier as the scheduled carrier, the configuration of the carrier as the scheduled carrier of the second base station is prohibited.  16. The method of claim 15 wherein:  In the case that the second base station is configured to configure the carrier as a scheduling carrier, the carrier coordination information further includes: a candidate scheduled carrier set corresponding to the carrier used by the second base station, where the The second base station configures one or more carriers in the set of candidate scheduled carriers corresponding to the carrier used by the second base station as the scheduled carrier of the second base station; or  In the case that the second base station is not configured to configure the carrier as the scheduling carrier, the carrier coordination information further includes: a set of scheduled carriers corresponding to the carrier of the first base station, where the second base station Configuring the carrier as the scheduled carrier of the second base station, and/or configuring one or more carriers in the set of scheduled carriers corresponding to the carrier of the first base station as the scheduling of the second base station Carrier; or  In the case that the second base station is configured to configure the carrier as the scheduled carrier, the carrier coordination information further includes: a candidate scheduling carrier set corresponding to the carrier used by the second base station, where the The second base station configures one or more carriers in the set of candidate scheduling carriers corresponding to the carrier used by the second base station as a scheduling carrier of the second base station; or  In the case that the second base station is not configured to configure the carrier as the scheduled carrier, the carrier coordination information further includes: a scheduling carrier set corresponding to the carrier of the first base station, where the second base station Configuring the carrier as the scheduling carrier of the second base station, and/or configuring one or more carriers in the set of scheduling carriers corresponding to the carrier of the first base station as the scheduled carrier of the second base station .  The method according to any one of claims 12 to 16, wherein the receiving the carrier coordination information sent by the first base station comprises: receiving, by the third party node, the first Carrier coordination information received by the base station, where the method further includes:  And transmitting, by the third-party node, acknowledgement information and/or carrier configuration information to the first base station, where the carrier configuration information indicates carrier information configured by the second base station. The method according to any one of claims 12 to 16, further comprising: And returning acknowledgement information and/or carrier configuration information to the first base station, where the carrier configuration information is used to indicate carrier information configured by the second base station.  The method according to claim 13 or 14, further comprising: returning confirmation information and/or returning confirmation information to the first base station after configuring the carrier of the second base station according to the carrier coordination information Carrier configuration information; or  Transmitting a carrier configuration time to the first base station or transmitting the carrier configuration time to the first base station by using a third-party node, and configuring the carrier as a scheduling carrier of the second base station according to the carrier configuration time or Scheduling a carrier, wherein the carrier configuration time is a time at which the second base station configures a carrier.  The method according to claim 15 or 16, further comprising: receiving a carrier configuration time from the first base station, or  The carrier configuration time is received by the third base station from the first base station, where the carrier configuration time is a time when the first base station configures a carrier.  The method according to any one of claims 12 to 20, further comprising: interacting with the first base station to physically downlink the carrier of the first base station and/or the second base station The radio resource occupied by the control channel and/or the radio resource occupied by the physical downlink shared channel, or the third node interacts with the first base station to exchange radio resources occupied by the physical downlink control channel and/or the physical downlink shared channel The radio resource is configured to configure a physical channel of the carrier where the first base station and the second base station are located according to the radio resource occupied by the physical downlink control channel and/or the radio resource occupied by the physical downlink shared channel.  The method according to any one of claims 12 to 21, wherein the first base station is a macro base station and the second base station is a small base station, or the first base station is the small base station. The base station and the second base station are the macro base stations.  A method for cell interference management, comprising:  Receiving carrier coordination information from a first base station, where the carrier coordination information includes frequency information of a carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and at least one second base station Negotiating the scheduling characteristics of the carrier to reduce co-channel interference of the first base station and the at least one second base station on the carrier;  Forwarding the carrier coordination information to the at least one second base station. The method according to claim 23, further comprising: Receiving acknowledgment information and/or carrier configuration information from the at least one second base station and forwarding to the first base station, or  Receiving carrier configuration information from the at least one second base station, determining an intersection of the acknowledgement information and/or carrier configuration information by selecting, and transmitting an intersection of the acknowledgement information and/or carrier configuration information to the first base station, The carrier configuration information indicates carrier information configured by the second base station.  25. A device for cell interference management, comprising:  a generating module, configured to generate carrier coordination information, where the carrier coordination information includes frequency information of a carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and the second base station to negotiate a scheduling feature of the carrier to reduce co-channel interference of the first base station and the second base station on the carrier;  And a sending module, configured to send the carrier coordination information to the second base station.  The device according to claim 25, wherein the cross-carrier scheduling related information includes indication information, where the indication information is used to indicate whether the carrier is configured or not configured when the scheduling characteristic of the carrier is negotiated. The scheduling carrier of the first base station indicates whether the carrier is configured or not configured as the scheduled carrier of the first base station.  The apparatus according to claim 25, wherein the cross-carrier scheduling related information includes carrier configuration request information, where the carrier configuration request information is used to request the second base station to configure or not to configure the carrier as Scheduling a carrier or requesting the second base station to configure or not to configure the carrier as a scheduled carrier.  The device according to claim 26 or 27, further comprising: a receiving module, configured to receive acknowledgement information and/or carrier configuration information returned by the second base station, where the carrier configuration information is used to indicate Carrier information configured by the second base station;  And a configuration module, configured to configure a carrier of the first base station according to the acknowledgement information and/or the carrier configuration information.  The apparatus according to any one of claims 25 to 28, wherein the sending module is configured to send the carrier coordination information to a third party node, and the carrier coordinates are coordinated by the third party node The information is forwarded to the at least one second base station, and the device further includes: a receiving module, configured to receive, by the third-party node, acknowledgement information and/or carrier configuration information that is returned from the at least one second base station, or to receive, by the third-party node, the at least one An intersection of acknowledgment information and/or carrier configuration information returned by the second base station, where the The setting module configures a carrier of the first base station according to the intersection of the acknowledgement information and/or the carrier information, where the carrier configuration information indicates carrier information configured by the at least one second base station.  The apparatus according to any one of claims 25 to 29, further comprising: an interaction module, configured to exchange with the second base station the first base station and/or the second base station The radio resource occupied by the physical downlink control channel of the carrier and/or the radio resource occupied by the physical downlink shared channel, or the third node and the second base station interacting with the radio resource occupied by the physical downlink control channel and/or the physical The radio resource occupied by the downlink shared channel is configured to configure a physical channel of the carrier where the first base station and the second base station are located according to the physical downlink control channel and/or the radio resource occupied by the physical downlink shared channel.  31. A device for cell interference management, comprising:  a receiving module, configured to receive carrier coordination information sent by the first base station, where the carrier coordination information includes frequency information of the carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station And scheduling, by the second base station, a scheduling characteristic of the carrier, to reduce co-channel interference of the first base station and the second base station on the carrier;  And a configuration module, configured to configure a carrier of the second base station according to the carrier coordination information.  The device according to claim 31, wherein the cross-carrier scheduling related information includes indication information, where the indication information is used to indicate that the carrier is configured or not configured as a scheduling carrier of the first base station or Instructing to configure or not to configure the carrier as the scheduled carrier of the first base station,  Where the configuration module configures the carrier as the scheduling carrier of the first base station, prohibiting configuring the carrier as the scheduling carrier of the second base station; and not configuring the carrier as the first base station In the case of a scheduling carrier, the carrier is configured as a scheduling carrier of the second base station; and when the carrier is configured as a scheduled carrier of the first base station, configuring the carrier as the second base station The scheduling carrier; if the carrier is not configured as the scheduled carrier of the first base station, prohibiting configuring the carrier as the scheduling carrier of the second base station.  The apparatus according to claim 31, wherein the cross-carrier scheduling related information further comprises: a carrier configuration request, configured to request the second base station to configure or not to configure the carrier as a scheduling carrier or a requesting station. The second base station configures or does not configure the carrier as a scheduled carrier, The configuration module, when the second base station is configured to configure the carrier as a scheduling carrier, configure the carrier as a scheduling carrier of the second base station; When the carrier is used as the scheduling carrier, the carrier is prohibited from being configured as the scheduling carrier of the second base station; and when the second base station is configured to configure the carrier as the scheduled carrier, configuring the carrier as The scheduled carrier of the second base station; if the second base station is not configured to configure the carrier as the scheduled carrier, prohibiting configuring the carrier as the scheduled carrier of the second base station.  The device according to any one of claims 31 to 33, further comprising: a sending module, configured to return acknowledgment information and/or carrier configuration information to the first base station, the carrier configuration The information is used to indicate carrier information configured by the second base station.  35. A device for cell interference management, comprising:  a receiving module, configured to receive carrier coordination information from a first base station, where the carrier coordination information includes frequency information of a carrier and cross-carrier scheduling related information of the carrier, where the cross-carrier scheduling related information is used by the first base station and At least one second base station negotiates scheduling characteristics of the carrier to reduce co-channel interference of the first base station and the at least one second base station on the carrier;  And a forwarding module, configured to forward the carrier coordination information to the at least one second base station.