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WO2014047830A1 - Procédé de coordination et de planification de ressources radio sur un réseau à plusieurs rat - Google Patents

Procédé de coordination et de planification de ressources radio sur un réseau à plusieurs rat Download PDF

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Publication number
WO2014047830A1
WO2014047830A1 PCT/CN2012/082142 CN2012082142W WO2014047830A1 WO 2014047830 A1 WO2014047830 A1 WO 2014047830A1 CN 2012082142 W CN2012082142 W CN 2012082142W WO 2014047830 A1 WO2014047830 A1 WO 2014047830A1
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WIPO (PCT)
Prior art keywords
scheduling
access network
network element
base station
resource management
Prior art date
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PCT/CN2012/082142
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English (en)
Chinese (zh)
Inventor
肖登坤
贺媛
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Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201280025674.6A priority Critical patent/CN103858475A/zh
Priority to PCT/CN2012/082142 priority patent/WO2014047830A1/fr
Publication of WO2014047830A1 publication Critical patent/WO2014047830A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]

Definitions

  • the present invention relates to a Radio Access Technology (RAT) network, and in particular, to a method and system for radio resource scheduling in a multi-RAT network, a radio resource management coordinator, and an access network element.
  • RAT Radio Access Technology
  • Current wireless networks include a variety of wireless access technologies, such as 2G, 3G, Long Term Evolution (LTE), and Advanced Long Term Evolution (LTE-A).
  • 1 is a schematic structural diagram of a conventional wireless network using a multi-RAT system, including multiple radio resource management controllers (such as RRM_2G, RRM_3G, RRM_4G ... RRM_NG) using different RATs, a core network, and a central controller.
  • the central controller is connected to the core network and is connected to a plurality of base stations employing one or more RATs such as 2G, 3G, LTE, and the like.
  • the central controller is primarily responsible for managing handover and/or cell reselection of terminals between different base stations. For example, information about cell capacity and load can be collected to assist the base station in determining the target cell.
  • the radio resource management controller can be a single node device or a module in the base station.
  • the radio resource management controllers or base stations of the respective RAT systems independently schedule their radio resources, and there is no direct interface between the base stations using different RAT technologies, they cannot exchange corresponding resources, loads, and other information.
  • the respective resources cannot be coordinated and utilized, which affects the resource utilization of the entire wireless network to a certain extent, and cannot fully utilize the resources of the entire wireless network to improve the service quality of the service.
  • the present invention provides a method and system for radio resource scheduling in a multi-RAT network, a radio resource management coordinator, and a base station.
  • a method for scheduling radio resources in a wireless network comprising at least one base station employing at least one radio access technology (RAT), the method comprising: from at least An access network element receiving scheduling information about the at least one base station, wherein the scheduling information includes information about radio resources scheduled by the scheduled terminal for which the at least one base station respectively serves; from the at least one The first access network element in the access network element receives a scheduling request, where the scheduling request is a radio resource coordination request sent by the first access network element for the first multimode terminal served by the first access network element; Generating a scheduling response according to the received scheduling information and the scheduling request; and sending the scheduling response to the first access network element.
  • RAT radio access technology
  • a method for radio resource scheduling in a wireless network by an access network element comprising a radio resource management coordinator and a radio resource management coordinator connected thereto At least one base station employing at least one radio access technology, the method comprising: receiving a scheduling response from the radio resource management coordinator, wherein the scheduling response is responsive to a first access network in the wireless network Generated by the scheduling request sent by the element; generating a scheduling indication or a scheduling result according to the scheduling response.
  • a radio resource management coordinator for radio scheduling resources in a wireless network, the radio network comprising at least one base station employing at least one radio access technology (RAT),
  • the radio resource management coordinator includes: a receiver configured to receive scheduling information about the at least one base station from at least one access network element, and a first access network from the at least one access network element Network element reception a scheduling request, wherein the scheduling information includes information about radio resources scheduled by the scheduled terminal for which the at least one base station respectively serves, the scheduling request being served by the first access network element a radio resource coordination request sent by the first multimode terminal; a processor configured to generate a scheduling response according to the received scheduling information and the scheduling request; and a transmitter configured to send the scheduling response to the first An access network element.
  • RAT radio access technology
  • an access network element capable of performing radio resource scheduling in a wireless network, the wireless network comprising at least one base station employing at least one radio access technology (RAT),
  • the access network element includes: a receiver configured to receive a scheduling response from the radio resource management coordinator, wherein the scheduling response is a scheduling request sent in response to a first access network element in the wireless network And generating, and the processor, configured to generate a scheduling indication or a scheduling result according to the scheduling response.
  • RAT radio access technology
  • an apparatus for scheduling radio resources in a wireless network comprising at least one base station employing at least one radio access technology (RAT), the apparatus comprising: Means for receiving, by the at least one access network element, scheduling information about the at least one base station, wherein the scheduling information includes information about radio resources scheduled by the scheduled terminal for which the at least one base station respectively serves; a module for receiving a scheduling request by a first access network element in the at least one access network network element, where the scheduling request is sent by the first access network element for the first multimode terminal served by the first access network element a radio resource coordination request; a module for generating a scheduling response according to the received scheduling information and the scheduling request; and a module for transmitting the scheduling response to the first access network element.
  • RAT radio access technology
  • an apparatus for use by an access network element for radio resource scheduling in a wireless network comprising a radio resource management coordinator and a radio resource management coordinator connected thereto At least one base station employing at least one radio access technology, the apparatus comprising: means for receiving a scheduling response from the radio resource management coordinator, wherein the scheduling response is responsive to a first access in the wireless network network a module generated by a scheduling request sent by a network element; and a module for generating a scheduling indication or a scheduling result according to the scheduling response.
  • a machine readable medium having stored thereon is a set of instructions that, when executed, cause the machine to perform the method described above.
  • the present invention can coordinate and schedule resources that can be tuned by at least two base stations in different RATs in a wireless network, thereby improving resource utilization of the entire network, avoiding system throughput loss, and improving service quality.
  • FIG. 1 is a schematic structural diagram of a conventional wireless network using a multi-RAT system
  • FIG. 2 is a schematic diagram of a wireless network for performing radio resource scheduling according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a radio resource scheduling method on a radio resource management coordinator side according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a method for scheduling a radio resource on an access network element side according to an embodiment of the present invention
  • FIG. 5 illustrates an exemplary flow chart for wireless resource coordination and scheduling in a wireless network in accordance with another embodiment of the present invention
  • FIG. 6 is a schematic diagram of scheduling in a case where base stations of different RATs are co-site base stations according to still another embodiment of the present invention.
  • FIG. 7 is a block diagram showing the structure of a radio resource management coordinator according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an access network element for serving a multimode terminal according to an embodiment of the present invention.
  • FIG. 9 is a diagram showing an apparatus for setting a radio resource scheduling on a radio resource management coordinator side according to an embodiment of the present invention.
  • FIG. 10 illustrates a setting on a network element side of an access network for wireless according to an embodiment of the present invention. Schematic diagram of a device for resource scheduling. detailed description
  • a radio resource management coordinator in view of the problem caused by the lack of an effective direct interface between base stations and the independent scheduling of the base station in the existing multi-RAT network, a radio resource management coordinator is proposed, which can be combined with the wireless network.
  • the base station in the base station effectively interacts with the radio resource information that has been scheduled by each base station, so that the base station can consider the radio resources that have been scheduled by each base station when scheduling the radio resources for the terminal, thereby avoiding interference and improving resource utilization.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • CDMA2000 Code Division Multiple Access 2000
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • UMTS Universal Mobile Telecommunications System
  • the terminal may also be referred to as a User Equipment (UE: User Equipment), a Mobile Station (MS: Mobile Station), a Mobile Terminal (Mobile Terminal), an Access Terminal, and the like.
  • UE User Equipment
  • MS Mobile Station
  • Mobile Terminal Mobile Terminal
  • the terminal can communicate with one or more core networks via a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the terminal can be a mobile phone (or "cellular" phone), a computer with wireless communication capabilities, and the like.
  • the terminal can also be portable, pocket-sized, Handheld, computer built-in or in-vehicle mobile devices.
  • a multimode terminal is a terminal that can use multiple RAT technologies and is used in a wireless network with different RAT technology standards, and can support a variety of different radio signal processing methods.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM and GPRS, or may be a base station (NB, NodeB) in WCDMA, TD-SCDMA, CDMA 2000, and It may be an evolved base station (eNB or eNodeB, Evolutional Node B) in an LTE and LTE-A system, or a low power node (LPN), including a pico base station (Pico), a relay station (Relay), a home base station. (Femto/HeNB), remote radio head (RRH), repeater (Repeater), etc.
  • BTS Base Transceiver Station
  • NB NodeB
  • eNodeB Evolutional Node B
  • LPN low power node
  • Pico pico base station
  • Relay relay station
  • RRH remote radio head
  • repeater Repeater
  • the access network element may be the foregoing base station, or may be a radio network controller (RNC) or a GSM network in WCDMA, TD-SCDMA, and CDMA2000.
  • RNC radio network controller
  • BSC Base Station Controller
  • FIG. 2 is a schematic diagram of a wireless network system for wireless resource scheduling in accordance with an embodiment of the present invention.
  • the serving base stations of the first multimode user equipment (ie, the first multimode terminal) UE1 and the second multimode user equipment UE2 (hereinafter referred to as multimode UE1, multimode UE2) in the adjacent two cells are respectively the first
  • the corresponding wireless networks of the base station BS1 and the second base station BS2 are RATI and RAT2 adopting different radio access technologies, respectively.
  • the multimode UE1 is also within the common coverage of the first and second base stations.
  • a radio resource management coordinator RRM coordinator
  • FIG. 1 radio resource management coordinator
  • FIG. 2 exemplarily shows two base stations BS1 and BS2 and their respective served multimode UE1 and multimode UE2, it being understood that a plurality of other implementations performing similar functions may also be included in an actual wireless network. Base stations and terminals of different RATs. An exemplary embodiment of performing radio resource scheduling in the wireless network system shown in FIG. 2 is further described below, with a focus on the description Radio resource scheduling and coordination performed by the communication service of the multimode UE1 within the common coverage of the two cells.
  • FIG. 3 shows an exemplary flow chart for a radio resource scheduling method in accordance with an embodiment of the present invention.
  • the method can be performed by a radio resource management coordinator in the wireless network.
  • the wireless network includes at least one base station employing at least one radio access technology (RAT), such as a plurality of base stations employing two or more RATs.
  • RAT radio access technology
  • step S310 radio resource management information about at least one base station employing a multi-RAT technology is received from at least one access network element.
  • the radio resource management information is information related to management of radio resources of the base station, and may be one or more of scheduling information, load information, and radio resource status information of the base station, where the scheduling information includes scheduled information about the serving of the base station.
  • Information about the radio resources scheduled by the terminal is information related to management of radio resources of the base station, and may be one or more of scheduling information, load information, and radio resource status information of the base station, where the scheduling information includes scheduled information about the serving of the base station. Information about the radio resources scheduled by the
  • the radio resource management coordinator may utilize any one or combination of pieces of information in the radio resource management information to generate a scheduling response. In general, the more radio resource management information collected by the wireless resource management coordinator, the stronger the ability to schedule and coordinate radio resources.
  • Any one of the at least one access network element may be a controller or a base station in the wireless network, and the controller or the base station may send the wireless resource management information to the radio resource management coordinator.
  • the scheduling information may include, for example, allocated time resources corresponding to the scheduled terminals, allocated frequency resources, allocated spatial resources, allocated codeword resources, used transmit power, service quality of service (QoS), transmission rate, scheduling period Information about one or more of the terminal location, multipoint collaboration collection.
  • the scheduling information can be used to determine the radio resources that each base station can schedule for UE1.
  • step S320 receiving, from the first access network element, resource scheduling in the wireless network to serve a certain multimode terminal (specifically, the multimode terminal whose communication service needs to be improved by submitting a scheduling request for the radio resource)
  • a certain multimode terminal specifically, the multimode terminal whose communication service needs to be improved by submitting a scheduling request for the radio resource
  • the multi-mode UE1 the base station serving the same is the first base station BS1
  • the access network element for which the access service is provided is the scheduling request of the first access network element
  • the scheduling request is a radio resource coordination request sent by the first access network element for the multimode UE1 it serves.
  • the scheduling request may be sent to the radio resource management coordinator.
  • the scheduling request may include information related to the current operating state of the multi-mode UE1.
  • the scheduling request may include service quality of service (QoS) with respect to multimode UE1, bandwidth required by the service, transmission rate of multimode UE1, transmission power of multimode UE1 (eg, current transmit power and maximum transmit power), multimode UE1
  • QoS service quality of service
  • bandwidth required by the service bandwidth required by the service
  • transmission rate of multimode UE1 transmission power of multimode UE1 (eg, current transmit power and maximum transmit power)
  • multimode UE1 The location, the measurement of the measured amount of the associated base station, the information of the plurality of RATs supported by the multimode UE1, and the information of one or more of the coordinated set of multiple points.
  • a scheduling response to the scheduling request is generated based on the received scheduling request and the radio resource management information.
  • the generation of the scheduling response is further dependent on the connection state of the multimode UE1 and the respective access network elements for which the radio resources can be provided.
  • the scheduling response indicates that the multimode UE1 needs to establish a connection with other related access network elements, and may include establishing a connection.
  • the required information is to enable the multimode UE1 to establish a connection with each access network element.
  • the access network element or base station providing radio resources for the multimode UE1 may be determined according to radio resource management information about the base station and a scheduling request.
  • the scheduling response may include various information required to establish a connection, such as one of a multi-RAT system identity, a controller identity, a base station identity, a cell identity, a carrier identity, and frequency information associated with an access network element to be connected. Multiple.
  • the scheduling response is based on the scheduling request and the radio resource management information.
  • the generated, indicating the proposed radio resource allocated to the multimode UE1 for communication service, is used for the next resource scheduling.
  • the scheduling response indicates the recommended radio resources for the base station, including: suggested time resources, suggested frequency resources, suggested spatial resources, suggested codeword resources, recommended transmit power, recommended scheduling period, recommended One of the multipoint collaboration collections Or multiple.
  • the scheduling response may also include an identification of the base station and/or the cell associated with the proposed allocated radio resource.
  • the radio resource management coordinator may propose a resource scheduling proposal for the scheduling request to the relevant access network element by using the scheduling response.
  • the radio resource management coordinator may according to the received radio resources. a management information and a scheduling request, determining, in the at least one base station, a base station that the schedulable resource can satisfy the scheduling request; selecting, in the determined base station, a base station that can optimize the service quality of the multimode UE1; and And the radio resource management information of the selected base station generates a scheduling response.
  • the scheduling request includes at least the transmission rate and transmission power of the multimode UE1 and the bandwidth required by the service of the multimode UE1
  • the principle of maximizing system throughput and/or minimizing the transmission power of the multimode UE1 may be followed.
  • At least one of the base stations is selected from, for example, all or a plurality of base stations of the plurality of base stations to schedule their resources.
  • the scheduling request includes at least one measurement result of the measurement amount of the base station, and the measurement result indicates one or more of signal strength, signal quality, and signal-to-noise ratio measured by all or a part of the base stations in the plurality of base stations, according to the measurement result, selecting One or more of the base station with the strongest measured signal strength, the base station with the best signal quality, and the base station with the highest signal to noise ratio.
  • the radio resource management information includes load information or radio resource status information about the base station, at least one base station with the smallest load or the largest idle resource may be selected according to the radio resource management information to schedule its resources.
  • the selected base station is not necessarily one base station, but may be two or more base stations, that is, The radio resources of two or more base stations are scheduled to jointly serve the multimode UE1 to optimize the quality of service of the service.
  • the scheduling response is sent to the first access network element.
  • the first access The network element is a base station, and the scheduling response is used, and at least the radio resources of the corresponding first base station can be coordinated and scheduled to meet the radio resource coordination request sent by the multi-mode UE1 served by the first base station.
  • the scheduling response may also be sent to other access network elements associated with other wireless resources that need to be coordinated.
  • at least two base stations for example, BS1 and BS2, which are different in RAT technology and whose service range covers the multimode UE1, may be used for all or some other base stations except BS1)
  • the resources that can be scheduled are coordinated and scheduled to meet the service needs of the multi-mode UE1.
  • the radio resource management coordinator can generate a scheduling response according to the radio resource management information and the scheduling request.
  • the first access network element may generate a scheduling indication or a scheduling result according to the scheduling response.
  • the scheduling indication or scheduling result may be sent to the multimode UE1 through the first access network element (which may be the base station BS1); then the multimode UE1 operates according to the scheduling indication or the scheduling result.
  • Coordinating and scheduling resources in the wireless network may be performed according to radio resource management information of all or a part of base stations of the at least one base station whose coverage may cover the multimode UE1, so that all the coverage of the multimode UE1 may be selected for the service range. Or resources that can be scheduled by some base stations are coordinated and scheduled.
  • the base station selection process according to the received scheduling request and radio resource management information, for example, among a plurality of base stations, determining, that the resources that can be scheduled can satisfy the scheduling request, and selecting, among the determined base stations, The multi-mode UE1 has the best service quality for the base station.
  • coordination and scheduling of radio resources of each base station may coordinate and schedule resources that can be scheduled by each relevant base station according to the principle of maximizing system throughput and/or minimizing transmission power of multi-mode UE1. To service multi-mode UE1, thereby improving system throughput and enabling multi-mode UE1 to achieve energy savings.
  • the wireless network includes a radio resource management coordinator and at least one base station employing at least one radio access technology connected to the radio resource management coordinator.
  • the method can be performed by an access network element in a wireless network.
  • step S410 a scheduling response is received from the radio resource management coordinator, wherein the scheduling response is generated in response to a scheduling request sent by the first access network element in the wireless network.
  • a scheduling indication or a scheduling result is generated according to the scheduling response.
  • the scheduling indication or scheduling result may be sent by the first access network element to the first multimode UE1 it serves.
  • An access network element in a wireless network can be a controller or base station therein. If the access network element associated with the radio resource involved in the scheduling indication or scheduling result is a controller in the wireless network, it may send the scheduling indication or scheduling result to its corresponding base station. If the first access network element is a base station controller, it forwards the scheduling response to the first base station, and the first base station generates a scheduling indication or scheduling result and sends the result to the multi-mode UEl. If the first access network element That is, the first base station directly generates a scheduling indication or a scheduling result by the first base station and sends the result to the multimode UE1.
  • the access network element may also send radio resource management information about the base station for generating a scheduling response to the radio resource management coordinator.
  • the transmission of the radio resource management information may be performed periodically or in response to a request from the radio resource management coordinator.
  • the access network element may also send a scheduling request to the radio resource management coordinator. For example, when the resources scheduled by the first base station corresponding to the first access network element are insufficient to meet the service requirement of the multimode UE1, or when the traffic of the multimode UE1 increases or the traffic channel status deteriorates, the scheduling request is sent. .
  • the scheduling response is related to the connection status of other access network elements associated with the multi-mode UE1 associated with the requested resource.
  • the multimode UE1 does not establish a connection with other access network elements except the first access network element in the wireless network, and cannot allocate other resources to serve the multimode UE1.
  • the multimode UE1 needs to establish a connection with at least one access network element in the other access network element to schedule other Resources; first The access network element generates a scheduling indication according to the scheduling response; the scheduling indication informs the multi-mode UE1 that a connection needs to be established with at least one access network element in the other access network element.
  • the scheduling response and the scheduling indication at this time may further include information required to establish a connection, such as one or more of a multi-RAT system identifier, a controller identifier, a base station identifier, a cell identifier, a carrier identifier, and frequency point information.
  • the multi-mode UE1 has established a connection with other access network elements except the first access network element in the wireless network in advance or through the foregoing process.
  • the UE generates a scheduling result according to a scheduling response received from the RRC coordinator; the scheduling result indicates a radio resource allocated to the multimode UE1 for communication services.
  • FIG. 5 illustrates an exemplary flow chart for wireless resource coordination and scheduling in a wireless network in accordance with another embodiment of the present invention.
  • Embodiments of the wireless resource scheduling method, the radio resource management coordinator, and the access network element of the present invention are further described below with reference to FIG.
  • the wireless network of Figure 5 includes at least a radio resource management coordinator, a first access network element and a second access network element using different RATs. More access network elements can be included in some wireless networks.
  • the radio resource scheduling method according to this embodiment includes the following steps:
  • Step S510 The radio resource management coordinator receives the radio resource management information of the base station BS1 sent by the first access network network element.
  • the first access network element may be any type of base station in the multi-RAT network (eg, eNB in LTE/LTE-A, NB in 3G, BTS in GSM and GPRS), or may be multi-RAT Any type of controller in the network (eg, RCDMA in WCDMA, TD-SCDMA, and CDMA 2000, BSC in GSM and GPRS).
  • the first access network element may be the base station BS1 or the first access network element is the controller of the management base station BS1. If the first access network element is the controller of the management base station BS1, the controller managing the base station BS1 can also transmit the radio resource management information of the other base stations it manages to the radio resource management coordinator.
  • the first access network element and the second access network element may respectively communicate with the radio resource management association
  • the modulator transmits radio resource management information (such as one or more of scheduling information, load information, and radio resource status information) of the base station BS1 and the base station BS2.
  • the resource management coordinator transmits radio resource management information of the base station itself or its management.
  • the scheduled radio resources reflected by the scheduling information can guarantee the quality of service (QoS) of the scheduled terminals.
  • the scheduling information may include, for example, allocated time resources corresponding to the scheduled terminals, allocated frequency resources, allocated spatial resources, allocated codeword resources, used transmit power, service QoS, transmission rate, scheduling period, terminal location, Information from one or more of the multipoint collaboration collections.
  • the scheduling information may also include a cell identifier and a terminal identifier corresponding to the scheduled terminal.
  • the scheduling information may further specifically include: information about a physical layer resource block (PRB), a multipoint cooperation set including a plurality of eNodeBs serving the terminal UE, or a low power node.
  • PRB physical layer resource block
  • a multipoint cooperation set including a plurality of eNodeBs serving the terminal UE or a low power node.
  • the first access network element may periodically send scheduling information of the base station BS1 to the radio resource management coordinator.
  • the first access network element may also send scheduling information of the base station BS1 based on the requirements of the radio resource management coordinator.
  • the radio resource management coordinator may first send a request for acquiring scheduling information of the base station BS1 to the first access network network element, and then the first access network element may send the scheduling information of the base station BS1 in response to the request. .
  • the terminal corresponding to the transmitted scheduling information may be a low speed mobile terminal located at the edge of the coverage of its serving base station. It will be apparent to those skilled in the art that the location of the terminal can be determined by various techniques such as Reference Signal Receiving Power (RSRP), Beam Forming, or GPS.
  • RSRP Reference Signal Receiving Power
  • Beam Forming or GPS.
  • Step S520 The first access network element sends a scheduling request to the radio resource management coordinator.
  • the multimode UE1 establishes a connection with the first access network element to support the traffic transmission of the multimode UE1, and the multimode UE1 is scheduled by the base station BS1.
  • the traffic of multimode UE1 increases
  • the scheduling resources of the base station BS1 are insufficient, and the service QoS requirements of the multi-mode UE1 cannot be met, such as the transmission rate, the transmission bandwidth, the transmission delay, etc. that cannot meet the service requirements, and the first access network.
  • the network element sends a scheduling request to the radio resource management coordinator.
  • the scheduling request may include information related to the current operating conditions of the multi-mode UE1.
  • the scheduling request may include the service QoS of the multimode UE1, the bandwidth required by the service, the transmission rate of the multimode UE1, the transmission power of the multimode UE1, the location of the multimode UE1, the multi-RAT capability information of the multimode UE1, and the base station.
  • the scheduling request may also include a cell identity and a terminal identity of the multimode UE1.
  • the multi-RAT capability information that is, the information of multiple RATs supported by the multimode UE1.
  • the measured quantity of the eNB is the reference signal receiving power (RSRP) and the RSRQ reference signal receiving quality (RSR), where the reference signal includes the CRS.
  • RSRP reference signal receiving power
  • RSRQ reference signal receiving quality
  • CRS Common Reference Signal
  • CSI-RS Channel State Indication RS
  • PRS PRS Position Reference Signal
  • the measurement amount of the NB is the UMTS Terrestrial Radio Access Frequency Division Duplex Common Pilot Channel Received Signal Code Power (Common Pilot Channel, CPICH) receiving signal.
  • Received Signal Code Power (RSCP) UTRA FDD Carrier Carrier Received Signal Strength Indication
  • UTRA FDD CPICH Ec/Noo In TD-SCDMA systems the measured amount of NB is UTRA TDD carrier.
  • P-Common Control Physical Channel (RSCP) (Common Control Physical Channel, CCPCH) RSCP.
  • the measured amount of NB is CDMA2000 lx RTT Pilot Strength Radio Transmission Technology Pilot Strength and CDMA2000 HRPD Pilot Strength High Rate Packet Data Pilot Strength.
  • the measured quantity of the BTS is the GSM carrier Carrier RSSI.
  • Step S530 The radio resource management coordinator generates a scheduling response according to the radio resource management information and the scheduling request of the at least one base station, and sends the scheduling response to the first access network element.
  • Step S540 The first access network element generates a scheduling indication or a scheduling result according to the scheduling response, and sends the scheduling indication to the multi-mode UE1.
  • Step S550 The multimode UE1 performs different operations according to the scheduling indication or the scheduling result.
  • Example 1 Multimode UE1 has established a connection in one or more RAT systems and is scheduled by one or more RAT base stations. When the new service or traffic increases, the serving RAT base station schedules insufficient resources, and the radio resource management coordinator coordinates, so that the multimode UE1 establishes a connection in the new other RAT system, and is scheduled by the new other RAT base station to provide New wireless resources to serve its communications business.
  • the specific description is as follows:
  • the multimode UE1 has established a connection with the eNB and is scheduled, but has not established a connection with the RNC and is scheduled by the NB.
  • the radio resource management coordinator knows that the multimode UE1 is in the NB coverage of the WCDMA system, which can be learned by the location information of the multimode UE1 in the scheduling request, or can be queried by the identifier of the multimode UE1 in the scheduling request. Know.
  • the serving RAT base station schedules insufficient resources, and the radio resource management coordinator determines that the NB may be based on the NB scheduling information, the radio resource status information and/or the load information, and the scheduling request.
  • the modulo UE1 provides a scheduling service.
  • the NB is a base station that satisfies the service QoS of the multimode UE1, and the NB supports the bandwidth required by the service, the NB is a RAT base station supported by the multimode UE1, and the NB is a measurement result of the multimode UE1.
  • the radio resource management coordinator sends a scheduling response to the eNB, informing that the multi-mode UE1 it serves needs to establish a connection with the RNC in the WCDMA system and be scheduled by the NB.
  • the scheduling response includes one or more of a multi-RAT system identity (which may be indicated in bits) that requires a connection to be established, a controller identity, and a base station identity.
  • the multi-RAT system is a WCDMA system
  • the controller is an RNC
  • the base station is an NB.
  • the eNB sends a scheduling indication to the multimode UE1, informing it to establish a connection with the RNC in the WCDMA system and being scheduled by the NB.
  • the scheduling indication includes one or more of a multi-RAT system identity (which may be indicated by a bit), a controller identity, and a base station identity that need to establish a connection.
  • the multi-RAT system is a WCDMA system
  • the controller is an RNC
  • the base station is an NB.
  • the radio resource management coordinator by coordination, causes the multimode UE1 to establish a connection in a new, other RAT system and is scheduled by the new other RAT base station.
  • the multimode UE1 has enabled the WCDMA-related radio frequency and baseband, and is in an idle state in the WCDMA system, that is, it can receive broadcast messages or paging messages of the WCDMA system.
  • the multimode UE1 establishes a connection with the RNC through the connection establishment process and is scheduled by the NB managed by the RNC.
  • the multimode UE1 does not turn on the WCDMA related radio frequency and baseband in order to save power.
  • the multimode UE1 opens the WCDMA-related radio frequency and baseband, establishes a connection with the RNC through cell identification, connection establishment, and the like, and is scheduled by the NB managed by the RNC.
  • the radio resource management coordinator can coordinate, so that the time difference of the service packet transmission between the multi-mode UE1 and the multiple RAT base stations can be tolerated, that is, does not affect the service QoS.
  • Example 2 Multimode UE1 has established a connection in one or more RAT systems and is scheduled by one or more RAT base stations.
  • the RRC resource coordinator is required to perform resource coordination and scheduling on other RAT systems to effectively utilize resources in different RAT systems, and improve communication service quality for the multimode UE1. the amount.
  • the specific description is as follows:
  • multimode UE1 has established a connection with the eNB and is scheduled, and establishes a connection with the RNC and is scheduled by the NB.
  • the multimode UE1 reports the measurement result of the measurement amount of the different RAT base station.
  • the eNB sends one or more of RSRP and RSRQ to the RRC coordinator, and the RNC sends one or more of UTRA FDD CPICH RSCP, UTRA FDD carrier RSSK UTRA FDD CPICH Ec/No to the RRC coordinator.
  • the eNB sends one or more of RSRP and RSRQ to the RRC coordinator
  • the RNC sends one or more of UTRA FDD CPICH RSCP, UTRA FDD carrier RSSK UTRA FDD CPICH Ec/No to the RRC coordinator.
  • the radio resource management coordinator learns radio resource status information and/or load information of different RAT base stations or different RAT controllers in different RAT systems from different RAT base stations or different RAT controllers.
  • the radio resource management coordinator learns the radio resource status information and/or the load information of the eNB from the eNB, and the radio resource management coordinator learns the radio resource status information and/or the load information of the NB from the RNC.
  • the radio resource management coordinator according to scheduling information of different RAT base stations, measurement results of different RAT base stations (such as measurement signal strength of different RAT base stations), radio resource status information and/or load information of different RAT base stations, and maximization system Throughput and minimization of the transmit power of multimode terminals, it is decided to schedule multi-mode UEl on the resources of different RAT base stations.
  • the RAT base station with the largest measurement result for example: the base station with the strongest signal strength, the best signal quality
  • the base station, the base station with the largest signal to noise ratio, and the like make the multimode UE1 transmit power minimum, and the RAT base station with the smallest load or the RAT base station with the most idle radio resources maximizes the system throughput.
  • the radio resource management coordinator sends a scheduling response to the eNB and/or the NB, and informs the radio resources suggested by the different RAT base stations, including the suggested time resource, the suggested frequency resource, the suggested space resource, the suggested codeword resource, and the recommended use.
  • the radio resources suggested by the different RAT base stations including the suggested time resource, the suggested frequency resource, the suggested space resource, the suggested codeword resource, and the recommended use.
  • the eNB and/or NB sends the scheduling result to the multimode UE1 to inform the allocated resources.
  • Multimode UE1 transmits data using the allocated resources.
  • resources in different RAT systems can be effectively utilized, and the radio resource management coordinator can improve system throughput and save multi-mode terminal power by coordination.
  • RATI and RAT2 may be an LTE system and a WCDMA system, respectively, where base station 1 and base station 2 may be LTE base stations (eNodeBs), and base stations ⁇ and base stations 2' may be WCDMA base stations (NodeBs).
  • the radio resource management coordinator can use the radio resources of time, frequency, space, power, codeword and the like to perform coordinated scheduling between the base stations of different RATs to more effectively improve the system performance of the entire network. Specifically, if the load of the base station is relatively light (for example, only a small frequency resource of 5 MHz bandwidth is used), and the load of the base station 1 and the base station 2 is heavy, when the base station 1 needs to schedule the new edge terminal 1 In the case of radio resources, the base station 1 may have been unable to coordinate with the base station 2 for internal resources in the same RAT system.
  • the base station 1 sends a scheduling request to the radio resource management coordinator, and the radio resource management coordinator can generate a scheduling response, for example, for the frequency resource of the base station according to the scheduling request, and the scheduling response further indicates that the terminal 1 and the base station 1 are required to establish a connection.
  • the base station 1 receives the scheduling response, and instructs the terminal 1 to establish a connection with the base station 1, thereby implementing the effect of simultaneously serving the radio resources of the base station 1 and the base station 1 to the terminal 1.
  • the base station 1 can be instructed to base the RAT2 (WCDMA)-specific frequency resource that the base station has not scheduled for its served terminal to the terminal 1 served by the base station 1, thereby enabling the base station to utilize its idle frequency resource. Come to service terminal 1.
  • other radio resources other than frequency resources may also be used for coordinated scheduling between base stations.
  • the radio resource management information utilized by the radio resource management coordinator may be a load condition or a resource idle condition of the base station.
  • FIG. 7 shows a schematic structural diagram of a radio resource management coordinator 700 according to an embodiment of the present invention.
  • the RRC coordinator 700 can perform the operations described above in connection with Figures 3-6.
  • the radio resource management coordinator 700 in FIG. 7 can effectively exchange radio resource information that the base station has scheduled with base stations employing different RATs in the radio network, so that the base station can consider when scheduling radio resources for the terminal. Radio resources that have been scheduled by at least one base station to avoid interference and improve resource utilization.
  • the radio resource management coordinator 700 can be implemented as a separate entity in a wireless network, or as a functional module in a base station or other network entity.
  • the radio resource management coordinator proposed by the embodiment of the present invention is not limited to any specific specific structure.
  • the radio resource management coordinator proposed by the embodiment of the present invention may have the same hardware structure as the existing radio resource management device, and only implements the function upgrade of the existing radio resource management device to implement the embodiment according to the present invention.
  • some new definitions may be defined between the radio resource management coordinator and the radio resource management coordinator and the base station. Interface, dedicated to delivering these messages.
  • the invention is not limited to these newly defined interfaces, but the transfer of these messages can also be achieved through existing appropriate interfaces.
  • the radio resource management coordinator 700 can include a receiver 710, a processor 720, and a transmitter 730.
  • the receiver 710 can be configured to receive, from the at least one access network element, radio resource management information about at least one base station employing different RATs in the wireless network, and from the first access network in the at least one access network element
  • the network element receives a scheduling request, which is a radio resource coordination request sent by the first access network element for the multimode UE1 it serves.
  • the processor 720 is configurable to generate a scheduling response based on the received radio resource management information and the scheduling request.
  • Transmitter 730 can be configured to transmit the generated scheduling response to the first access network element.
  • At least one access network element may periodically send radio resource management information to the radio resource management coordinator 700, in which case the receiver 710 may further The method is configured to periodically receive radio resource management information from at least one access network element.
  • at least one access network element may send radio resource management information based on a requirement of the radio resource management coordinator, in which case the transmitter 730 may be further configured to access the at least one access network.
  • the element transmits a request for acquiring radio resource management information, and the receiver 710 can be further configured to receive radio resource management information responsive to the request from the access network element.
  • the radio resource management coordinator 700 Since the radio resource management coordinator 700 performs resource scheduling to satisfy the resource scheduling request for the multimode UE1, it is not necessary to receive radio resource management information of the base station from all access network elements in the network, and only the service range can cover the multimode UE1.
  • the resources of the base station corresponding to the access network element may be served by the multimode UE1 by scheduling; therefore, the receiver 710 may only receive the radio resource management information from the access network element whose service range can cover the multimode UE1.
  • the resource scheduling request for the multi-mode UE1 can be satisfied by using the information for resource coordination and scheduling.
  • the processor 720 is further configured to: when the multimode UE1 has established a connection with other access network elements other than the first access network element in the at least one access network element, A scheduling response is generated according to the received radio resource management information and the scheduling request.
  • the scheduling response indicates a radio resource suggested to be allocated to the multimode UE1 for communication traffic;
  • the transmitter 730 is further configured to transmit the scheduling response to the access network associated with the proposed allocated radio resource in the at least one access network element Network elements, so that these related access network elements participate in resource coordination and scheduling. Since the resource scheduling is for the multimode UE1, the transmitter 730 sends a scheduling response to the first access network element to notify the multimode UE1 to perform the corresponding operation through the base station BS1.
  • the processor 720 may be further configured to use the received scheduling request and the radio resource management information, For example, in a plurality of base stations, first determining, that the resources that can be scheduled can satisfy the scheduling request, and then selecting one or more base stations in the determined base station that can optimize the service quality of the multimode UE1; Scheduling the request and the radio resource management information of the selected base station to generate a scheduling response.
  • the first access network element sends a scheduling request to the radio resource management coordinator 700, and the scheduling request includes at least a transmission rate and a transmission power of the multimode UE1, and a service requirement thereof.
  • the processor 720 is further configured to select at least one of the base stations from, for example, all or a portion of the plurality of base stations in accordance with the principle of maximizing system throughput and/or minimizing transmit power of the multi-mode UE1. Maximizing system throughput and/or minimizing transmit power of multi-mode UE1 by scheduling the use of selected radio resources of at least one base station.
  • the scheduling request sent by the first access network element to the radio resource management coordinator 700 includes at least a measurement result of the measurement amount of the base station, and the measurement result indicates, for example, all or part of the plurality of base stations.
  • the processor 720 selects one or more of the base station with the strongest measured signal strength, the base station with the best signal quality, and the base station with the highest signal to noise ratio.
  • the radio resources of the selected base station are used by scheduling to optimize the improvement of the service quality of the multi-mode UE1.
  • the radio resource management information transmitted by the access network element includes load information or radio resource status information about the base station.
  • the processor 720 selects at least one base station with the least load or the most idle resources according to the load information or the radio resource status information about the base station.
  • the radio resources of the selected base station are used by scheduling to optimize the improvement of the service quality of the multimode UE1.
  • the processor 720 is further configured to: when the multimode UE1 does not establish a connection with other access network elements of the at least one access network element except the first access network element, The received radio resource management information and the scheduling request generate a scheduling response; the transmitter 710 is further configured to send the scheduling response to the first access network element; the scheduling response notifies the first access network element: the multimode UE1 A connection needs to be established with at least one access network element in the other access network element to schedule and use resources of the base station associated with the other access network element.
  • the sent scheduling response includes the multi-RAT system identifier, the controller identifier, the base station identifier, the cell identifier, the carrier identifier, and the carrier identifier required to establish the connection. One or more of the frequency information.
  • the processor 720 may also determine, according to the radio resource management information about the base station and the scheduling request, the base station that can allocate resources for the multi-mode UE1, and then indicate, by using the generated scheduling response, that the multi-mode UE1 corresponds to the determined base station.
  • the access network element establishes a connection.
  • radio resource management coordinator 700 and the receiver 710, the processor 720, and the transmitter 730 included therein can also be configured to perform any of the embodiments described above in connection with Figures 3-6 with respect to the radio resource management coordinator. operating.
  • FIG. 8 is a block diagram showing the structure of an access network element 800 according to an embodiment of the present invention.
  • the access network element 800 can perform the operations of the access network element described above in connection with Figures 3-6.
  • access network element 800 can be an access network element in a multi-RAT network.
  • the multi-RAT network may also include a plurality of other access network elements that employ at least one radio access technology and that may perform similar functions as the access network element 800.
  • the multi-RAT network may also include a radio resource management coordinator as described above in connection with FIG.
  • access network element 800 can include a receiver 810 and a processor 820.
  • the receiver 810 is configured to receive a scheduling response from the RRC coordinator, the scheduling response being generated in response to a scheduling request sent by the first access network element in the wireless network; the processor 820 configured to respond according to the scheduling Generate scheduling instructions or scheduling results.
  • Access network element 800 may be a base station or controller (e.g., a base station controller) in a wireless network.
  • the radio resource scheduling in the radio network performed by the access network element is a resource scheduling request for the multimode UE1 served by the first access network element.
  • the service range of the access network element should cover the multimode UE1.
  • the access network element 800 further includes a transmitter 830, configured to send the scheduling indication or the scheduling result to the multi-mode UE1 served by the first access network element.
  • the access network element 800 at this time is usually the first access network element, but may also be the other access network element.
  • the access network element 800 further includes another transmitter configured to send the radio resource management information to the radio resource management coordinator.
  • the other transmitter can also be as described above
  • Transmitter 830 is combined into one transmitter, i.e., transmitter 830 transmits radio resource management information, as well as scheduling indications or scheduling results.
  • the transmitter 830 may periodically transmit the radio resource management information to the radio resource management coordinator, or may transmit the radio resource management information to the radio resource management device in response to the radio resource management coordinator requesting the radio resource management information.
  • the receiver 810 is further configured to coordinate from the radio resource management when the multimode UE1 has established a connection with other access network elements other than the first access network element in the wireless network.
  • the processor receives the scheduling response; the processor 820 is further configured to generate a scheduling result according to the scheduling response; the transmitter 830 is further configured to send the scheduling result to the multi-mode UE1.
  • the scheduling result indicates the radio resource allocated to the multimode UE1 for communication traffic.
  • the scheduling response indicates the recommended radio resources for the base station, including: suggested time resources, suggested frequency resources, suggested spatial resources, suggested codeword resources, recommended transmit power, recommended scheduling period, recommended multiple Click one or more of the collaboration collections.
  • the receiver 810 is further configured to perform radio resource management when the multimode UE1 does not establish a connection with other access network elements other than the first access network element in the wireless network.
  • the coordinator receives the scheduling response; the scheduling response informs the first access network element:
  • the multimode UE1 needs to establish a connection with at least one access network element in the other access network element.
  • Processor 820 is further configured to generate a scheduling indication based on the scheduling response.
  • the transmitter 830 is further configured to send a scheduling indication to the multimode UE1; the scheduling indication informs the multimode UE1 that a connection needs to be established with at least one access network element in the other access network network elements.
  • the scheduling response and the scheduling indication further include an identifier of the access network element that needs to establish a connection, for example, a multi-RAT system identifier, a controller identifier, a base station identifier, and a cell required to establish a connection, including an access network element that needs to establish a connection.
  • an identifier of the access network element that needs to establish a connection for example, a multi-RAT system identifier, a controller identifier, a base station identifier, and a cell required to establish a connection, including an access network element that needs to establish a connection.
  • a multi-RAT system identifier for example, a multi-RAT system identifier, a controller identifier, a base station identifier, and a cell required to establish a connection, including an access network element that needs to establish a connection.
  • access network element 800 and receiver 810, processor 820, and transmitter 830, which are included therein, may also be configured to perform the embodiments described above in connection with Figures 3-6 And any operation of the access network element.
  • FIG. 9 shows a schematic diagram of an apparatus 900 for radio resource scheduling in a wireless network, including at least one base station employing at least one RAT, in accordance with an embodiment of the present invention.
  • the apparatus 900 may include: a module 910 that receives radio resource management information about at least one base station from at least one access network element; and a first access network element from at least one access network element a module 920 for receiving a scheduling request, where the scheduling request is a radio resource coordination request sent by the first access network element for the multimode UE1 served by the first access network element; generating a scheduling response according to the received radio resource management information and the scheduling request Module 930; and a module 940 that sends a scheduling response to the first access network element.
  • apparatus 900 can also include a plurality of functional modules for performing various operations of the radio resource management coordinator described above in connection with Figures 3-6, respectively.
  • FIG. 10 illustrates an apparatus 1000 for wireless resource scheduling in a wireless network on an access network element side, the wireless network including a radio resource management coordinator and connected to a radio resource management coordinator, in accordance with an embodiment of the present invention.
  • At least one base station employing at least one RAT.
  • the apparatus 1000 includes: a module 1010 for receiving a scheduling response from a radio resource management coordinator, the scheduling response being generated in response to a scheduling request sent by a first access network element in a wireless network; generating a scheduling indication or scheduling according to the scheduling response The resulting module 1020.
  • Apparatus 1000 can also include a module 1030 for transmitting a scheduling indication or scheduling result.
  • the various aspects described herein can be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof.
  • the software, firmware, middleware, microcode, program code, or code segments can be stored in a machine readable medium, such as a storage component.
  • the techniques described herein can be implemented with modules (e.g., programs, functions, etc.) that implement the functions described herein.
  • the software code can be stored in a memory unit and executed by the processor.
  • the memory unit can be implemented in the processor or can be external to the processor. In the latter case, the memory can be connected to the processor by various means.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un procédé de planification de ressources radio sur un réseau sans fil. Selon l'invention, le réseau sans fil comprend au moins une station de base qui utilise au moins une technologie d'accès radio (RAT). Le procédé de l'invention fait appel : à la réception d'informations de gestion de ressources radio, concernant au moins une station de base, en provenance d'au moins un élément de réseau d'accès ; à la réception d'une demande de planification d'un premier élément de réseau d'accès, la demande de planification étant une demande de coordination de ressources radio envoyée par le premier élément de réseau d'accès à destination d'un premier terminal à plusieurs modes desservi par le premier élément de réseau d'accès ; au fait de générer une réponse de planification conformément aux informations de gestion de ressources radio reçues et à la demande de planification ; et à l'envoi de la réponse de planification au premier élément de réseau d'accès. Selon la présente invention, les ressources sont coordonnées et planifiées entre au moins deux stations de base qui utilisent des RAT différentes sur un réseau sans fil, ce qui augmente l'utilisation des ressources de tout le réseau, en évitant une perte de débit de système et en améliorant la qualité de service.
PCT/CN2012/082142 2012-09-27 2012-09-27 Procédé de coordination et de planification de ressources radio sur un réseau à plusieurs rat Ceased WO2014047830A1 (fr)

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