CN101489303A - Method, base station and mobile station for sharing common control channel among multiple base stations - Google Patents

Abstract

The invention discloses a method for multiple base stations to share a common control channel, a base station and a mobile station. In the multi-base station sharing common control channel method according to the present invention, two or more adjacent BSs can first identify the mobile station in their overlapping coverage areas, and then establish a common control channel for the mobile station; or can be Two or more adjacent BSs first establish a common control channel. When a mobile station enters its overlapping coverage area, the mobile station communicates with multiple base stations through the established common control channel. At the same time, the present invention also proposes the serving base station and neighboring base stations, and the mobile station used in the present invention.

Description

Method for multiple base stations to share common control channel, base station and mobile station

technical field

The present invention relates to the field of mobile communication, more specifically, to a method for sharing a common control channel by multiple base stations, a base station and a mobile station.

Background technique

IMT-Advanced (Advanced International Mobile Telecommunications) next-generation mobile network puts forward higher requirements on system capacity. Some standardization groups or organizations are actively developing some drafts to meet these requirements, in the hope that these drafts will receive attention during the IMT-Advanced evaluation process. As a supplement to the IEEE802.16 standard, the IEEE 802.16m task group was recently launched to provide advanced air interface technology to achieve improved operating performance within the licensed frequency band, with the goal of meeting the requirements for cells in IMT-Advanced next-generation mobile networks Various requirements.

With the development of various technologies targeting the IMT-Advanced next-generation mobile network, neighboring BSs (base stations) are required to cooperate with each other to adopt these new technologies. MS (mobile station) status information (SINR, etc.), reports, requests, etc. are no longer only used by the BS to which it belongs, but also need to be shared by multiple other BSs. So the problem is how to forward this information to the other BSs involved.

Currently, an MS can only send its status information and requests to the BS it belongs to. The BS can forward these information to neighboring cells through the backbone network. Doing so causes latency issues and adds additional processing burden at the BS and MS. In addition, the responses of neighboring BSs are also transmitted back through the backbone network.

Figure 1 shows an example of MS handover (MS handover). First, the MS sends a HO (handover) request to the BS to which it belongs (step ①). The serving BS has to negotiate with neighboring BSs to check possible candidates for the target BS. During this operation, the serving BS sends a pre-notification request to a neighboring BS through the backbone network, which carries MS status information. The specific process is: the serving BS sends a HO pre-notification request to the serving WAC (wireless access controller) ( Step ②); Then the service WAC transmits the HO pre-notification request to the target WAC through the backbone network (step ③), and the data message may experience IP encapsulation and routing delay during the transmission process; finally, the target WAC transmits the HO pre-notification request to the target BS (step ④). The requested neighbor BS sends back a response to the target WAC (step ⑤), the response includes service level prediction, estimated HO time and HO optimization, etc. The target WAC transmits the message to the serving WAC through the backbone network (step ⑥), and then the serving WAC continues to transmit the message to the serving BS (step ⑦). After getting feedback from the target BS, the serving BS may send a HO response back to the MS (step ⑧). Although the MS is located within the coverage and direct communication distance of the candidate target BS, the MS to which it belongs still needs to receive and forward the MS's state information and handover intention first. From the message flow point of view, if the MS's status information and handover intention reach the target BS, it may have to experience IP encapsulation/decapsulation delay, routing delay, etc., which leads to latency problems and increases the BS and additional processing burden at the MS.

Contents of the invention

The present invention proposes a method for multiple base stations to share (uplink/downlink) common control channel, serving base station, neighbor base station and mobile station, wherein multiple base stations can monitor and receive MS uplink control message transmission through the common control channel. In this way, neighboring BSs can easily, directly and quickly obtain some MS information (such as SINR, HO request, etc.), without the need to obtain these information from the MS's serving BS. Multiple BSs can receive the control information transmitted by the MS through this channel. This transmission can be thought of as an uplink broadcast whereby the MS broadcasts its message to multiple BSs. The present invention makes full use of the characteristics of signal broadcasting without additional bandwidth consumption. For the downlink, there can also be a common control channel shared by multiple BSs, where neighboring BSs can send control information to the MSs involved.

According to the first solution of the present invention, a method for sharing a common control channel by multiple base stations is proposed, including the following steps: identifying a mobile station in the overlapping coverage area of two or more base stations; notifying the serving base station of the mobile station of the The mobile station is in an overlapping coverage area; the serving base station negotiates with neighbor base stations covering the mobile station to establish a common control channel; and the serving base station notifies the mobile station of information related to the common control channel.

According to the second solution of the present invention, a method for sharing a common control channel by multiple base stations is proposed, comprising the following steps: negotiating between adjacent base stations to establish a common control channel; identifying mobile stations in overlapping coverage areas of two or more base stations; notifying a serving base station of the mobile station that the mobile station is within an overlapping coverage area; and notifying the mobile station of information related to a common control channel by the serving base station.

Preferably, the step of identifying a mobile station within the overlapping coverage area of two or more base stations comprises: the mobile station detecting a pilot signal or other identification signal of a base station in an adjacent cell; signal or other identification signals to determine whether a neighboring base station exists; and when it is determined that a neighboring base station exists, the mobile station reports the detected signal, neighboring base station identification and signal quality to its own serving base station.

Preferably, the step of identifying the mobile station in the overlapping coverage area of two or more base stations includes: the mobile station sends uplink data or a periodic ranging signal; the base station in the adjacent cell of the mobile station detects the The uplink data or periodic ranging signal sent by the mobile station; when the base station in the adjacent cell of the mobile station detects the uplink data or periodic ranging signal sent by the mobile station, the corresponding The base station in the neighboring cell notifies the serving base station of the mobile station of the detected mobile station identity and signal quality of the mobile station.

Preferably, the step of the serving base station negotiating with a neighbor base station covering the mobile station to establish a common control channel includes: the serving base station performs resource allocation for the mobile station, and at the same time notifies the resource allocation result to the mobile station covering the mobile station neighbor base stations; and the neighbor base stations allocate the same resources according to their own state information, and establish the common control channel.

Preferably, the step of the serving base station negotiating with the neighbor base station covering the mobile station to establish a common control channel further includes: the neighbor base station determines that the same resource cannot be allocated according to its own state information, and refuses to join the common control channel .

Preferably, the step of the serving base station negotiating with a neighbor base station covering the mobile station to establish a common control channel includes: the serving base station notifying the neighbor base station covering the mobile station of its own allocable resources; the neighbor base station selecting each allowed allocatable resource, and feeding back to the serving base station; and the serving base station, according to the feedback results of each neighboring base station, selecting allocatable resources commonly allowed by all neighboring base stations for resource allocation, and establishing the common control channel, And notify each neighboring base station of the resource allocation result.

Preferably, the step of negotiating and establishing a common control channel between adjacent base stations includes: one base station performs resource allocation for the overlapping coverage area, and simultaneously notifies the neighbor base stations related to the above-mentioned overlapping coverage area of the resource allocation result; and the neighbor base station according to its own state information, allocate the same resources, and establish the common control channel.

Preferably, the step of negotiating and establishing a common control channel between neighboring base stations further includes: the neighboring base stations determine that the same resources cannot be allocated according to their own state information, and refuse to join the common control channel.

Preferably, the step of negotiating and establishing a common control channel between adjacent base stations includes: one base station notifies other neighboring base stations of its own allocable resources; the neighboring base stations select their respective allowed allocable resources, and feed back to the one base station; and According to the feedback results of each neighboring base station, the one base station selects the allocatable resources commonly allowed by all neighboring base stations for resource allocation, establishes the common control channel, and notifies each neighboring base station of the resource allocation result.

Preferably, the resources include at least one of time resources, frequency resources and coding resources.

Preferably, the common control channel is an uplink common control channel.

Preferably, the method for sharing a common control channel by multiple base stations further includes: the mobile station uses the established uplink common control channel to communicate with each base station that overlaps and covers the mobile station.

Preferably, the common control channel is a downlink common control channel. More preferably, the method for sharing a common control channel by multiple base stations further includes: the mobile station receiving information on the established downlink common control channel; and each base station overlapping the mobile station using the established downlink common control channel Communicating with the mobile station.

Preferably, the method for sharing a common control channel by multiple base stations further includes: the serving base station and the neighbor base station dynamically negotiate and adjust the common control channel according to at least one of the movement of the mobile station and channel condition changes ; and the serving base station is responsible for notifying the neighbor base stations and the mobile station of the change of the common control channel.

According to the third aspect of the present invention, a base station is proposed, comprising: a receiving unit for receiving a notification related to whether a mobile station belonging to the base station is in the overlapping coverage area of two or more base stations; a common control channel A unit for negotiating with neighboring base stations to establish a common control channel for a mobile station belonging to the base station and located in an overlapping coverage area or for an overlapping coverage area between the base station and a neighboring base station; and a notification unit that will be related to the common control channel The information of is notified to the mobile station belonging to the base station and located in the overlapping coverage area.

Preferably, the base station further includes: a mobile station detection unit in an adjacent cell, configured to detect uplink data or periodic ranging signals sent by a mobile station in an adjacent cell, where the mobile station in an adjacent cell represents a mobile station in an adjacent cell, wherein The notification unit is further configured to send a message to the serving base station of the neighboring cell that the mobile station in the neighboring cell is in two or In the overlapping coverage area of multiple base stations, notify the serving base station of the neighboring cell of the detected mobile station identity and signal quality of the mobile station in the neighboring cell, and the serving base station of the neighboring cell represents the neighboring cell The base station to which the mobile station belongs.

Preferably, for the mobile station belonging to the base station and located in the overlapping coverage area or for the overlapping coverage area of the base station and neighboring base stations, the common control channel unit performs resource allocation, and at the same time sends the resource allocation result through the notification unit Notifying neighboring base stations covering the mobile station or the overlapping coverage area.

Preferably, the receiving unit also receives resource allocation results from neighboring base stations, and the common control channel unit allocates the same resource according to the state information of the base station itself, and establishes the common control channel.

Preferably, the common control unit determines that the same resource cannot be allocated according to the status information of the base station itself, and refuses to join the common control channel.

Preferably, the common control channel unit notifies the allocatable resources of the base station itself to neighbor base stations covering the mobile station or related to the overlapping coverage area; the receiving unit receives feedback results from the neighbor base stations; and the The common control channel unit selects the allocatable resources commonly allowed by all neighboring base stations for resource allocation according to the feedback results of each neighboring base station, establishes the common control channel, and notifies each neighboring base station of the resource allocation result through the notification unit.

Preferably, the receiving unit also receives the notification of the allocatable resources from the neighbor base station; the common control channel unit selects the allowable resource allocation of the base station itself, and feeds back the selection result to the neighbor base station through the notification unit.

Preferably, the resources include at least one of time resources, frequency resources and coding resources.

Preferably, the common control channel is an uplink common control channel.

Preferably, the common control channel is a downlink common control channel. More preferably, the base station communicates with the mobile station using an established downlink common control channel.

Preferably, the common control channel unit dynamically negotiates and adjusts the common control channel with neighboring base stations according to at least one of the movement of the mobile station and channel condition changes; and the notification unit notifies the common control channel The change is notified to the neighbor base stations and the mobile station.

According to the fourth solution of the present invention, a mobile station is proposed, including: a neighboring cell base station detection unit, used to detect the pilot signal or other identification signals of the neighboring cell base station; signal or other identification signals to determine whether the base station of the neighboring cell exists; and the notification unit is used to send a notification that the mobile station is in the overlapping coverage area of two or more base stations to its own serving base station when it is determined that the base station of the neighboring cell exists , and report the detected signal, the identity of the neighboring cell base station and the signal quality to its own serving base station.

Typically, only MSs located in overlapping coverage areas of multiple BSs have a common control channel because only such MSs can communicate with multiple BSs. Multiple MSs can share a common control channel regardless of whether these MSs belong to the same BS, and the BSs involved can cooperate with each other to allocate the common control channel and make it visible to these MSs.

Common control channels take full advantage of the broadcast nature of signals in the uplink. Multiple BSs can receive MS uplink control channel transmissions (status reports, requests, etc.). In this way, useful MS information can be easily, quickly and effectively shared among multiple BSs, which is beneficial to the cooperation of multiple BSs for the same MS, such as fast handover, interference elimination, and the like.

The present invention gives an example of using the uplink common control channel for fast switching. Using this uplink common control channel, the target BS can immediately receive the HO request from the MS in the adjacent cell without waiting for the information from the serving BS, and respond quickly to the HO request. Therefore, the present invention proposes a novel fast handover scheme, which utilizes the direct control information communication between the MS and the target BS through the uplink common control channel.

The common control channel proposed by the present invention can share and exchange MS control information more easily, quickly and effectively among multiple BSs.

Description of drawings

The above-mentioned and other purposes, features and advantages of the present invention will be made clearer by illustrating preferred embodiments of the present invention in conjunction with the accompanying drawings below, wherein:

Figure 1 shows an example of MS handover (MS handover).

Fig. 2 shows a schematic diagram of a common control channel according to the present invention.

Fig. 3a shows a flowchart of establishing an uplink common control channel according to the first embodiment of the present invention, wherein two or more neighboring BSs identify a mobile station in their overlapping coverage areas, and then establish an uplink channel for the mobile station common control channel.

Figure 3b shows a flow chart of establishing an uplink common control channel according to the second embodiment of the present invention, wherein two or more adjacent BSs first establish an uplink common control channel, when a mobile station enters its overlapping coverage area, The mobile station communicates with multiple base stations through the established uplink common control channel.

Fig. 4a shows a flow chart of establishing a downlink common control channel according to the third embodiment of the present invention, wherein two or more adjacent BSs identify a mobile station in their overlapping coverage areas, and then establish a downlink channel for the mobile station common control channel.

Figure 4b shows a flow chart of establishing a downlink common control channel according to the fourth embodiment of the present invention, wherein two or more adjacent BSs first establish a downlink common control channel, when a mobile station enters its overlapping coverage area, Each base station communicates with the mobile station through the established downlink common control channel.

Fig. 5 shows an example of performing fast handover by exchanging control messages using an uplink common control channel.

FIG. 6 shows a block diagram of a BS 600 proposed by the present invention.

FIG. 7 shows a block diagram of the MS 700 proposed by the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and unnecessary details and functions for the present invention will be omitted during the description to avoid confusing the understanding of the present invention.

Fig. 2 shows a schematic diagram of a common control channel according to the present invention.

The MS is located in an overlapping area covered by multiple BSs, and all of these BSs can receive the uplink transmission of the MS. Through inter-BS cooperation, a common control channel is established so that the multiple BSs involved share a common time-frequency region. Multiple MSs can share the same common control channel, and different MSs can use TDMA, CDMA or other methods to avoid collisions in this channel. For example, a CDMA channel is one example of a variety of channels that are better able to avoid collisions. Likewise, a downlink common control channel is also possible, through which any involved BS can send messages to any involved MS.

The MS uplink control signal uses BSID (identification) to identify its communication partner, for example, for message exchange, one, more or all of the BSs involved can be identified. If a BS receives a message not destined for its own ID, the BS can ignore the message.

Each BS can detect the uplink data or periodic uplink signal of the MS to know whether the MS is still within its own coverage. When MSs move and/or channel conditions change, dynamic negotiation adjustments to the common control channel, involved MSs and BSs may also be required. When the common control channel changes, a BS is responsible for notifying other BSs and MSs of the change.

Fig. 3a shows a flowchart of establishing an uplink common control channel according to the first embodiment of the present invention, wherein two or more neighboring BSs identify a mobile station in their overlapping coverage areas, and then establish an uplink channel for the mobile station common control channel.

As shown in Fig. 3a, the mobile station located in the overlapping area of two or more BSs is first identified (step S301), and if such a mobile station exists, the serving BS is notified (step S302). There are two possible identification methods: MS active identification or neighbor BS identification.

■MS active identification: The mobile station detects the pilot signal (preabmle) or other identification signals of the base station of the adjacent cell. When the presence of the adjacent base station is detected, the mobile station reports the detected signal, the identification of the adjacent base station and the signal quality to itself The service BS.

■Neighboring BS identification: MS sends uplink data or periodic ranging signal (periodic ranging). When MS is within the coverage of adjacent cells, neighboring BS can detect the signal, so as to know the existence of mobile stations that do not belong to itself , the neighbor BS notifies the serving BS of the detected mobile station ID and signal quality.

The serving BS negotiates with the neighbor BS to establish an uplink common control channel (step S303):

○The serving BS allocates resources (time, frequency, code and other resources) to the mobile station in the overlapping coverage area, and at the same time notifies other neighboring BSs covering the mobile station of the resource allocation situation. resources to establish the uplink common control channel, or refuse to join the uplink common control channel; or

○The serving BS first notifies the adjacent BS of the resources that can be allocated to the uplink common control channel, and the adjacent BSs select the resources that can be allocated to the uplink common control channel according to their own state information, and then feed back to the serving BS, the service The BS selects the resources that can be allocated by everyone according to the feedback of each adjacent BS to establish the uplink common control channel, and then notifies each adjacent BS of the resource allocation result of the uplink common control channel.

Finally, the serving BS notifies the mobile station to use the established uplink common control channel to interact with multiple BSs (step S304).

Figure 3b shows a flow chart of establishing an uplink common control channel according to the second embodiment of the present invention, wherein two or more adjacent BSs first establish an uplink common control channel, when a mobile station enters its overlapping coverage area, The mobile station communicates with multiple base stations through the established uplink common control channel.

As shown in Figure 3b, regardless of whether there is a mobile station in the overlapping coverage area of two or more BSs, the adjacent BSs first negotiate to establish an uplink common control channel (step S311):

○ A BS allocates resources (time, frequency, coding, etc.) to the overlapping coverage area, and at the same time notifies other adjacent BSs related to the overlapping coverage area of the resource allocation, and the adjacent BSs allocate the same resources according to their own status information or to establish an uplink common control channel, or refuse to join the uplink common control channel; or

○ A BS first notifies the adjacent BS of the resources that can be allocated to the uplink common control channel, and the adjacent BSs select the resources that can be allocated to the uplink common control channel according to their own state information, and then feed back to the BS , the one BS selects shared and allocatable resources according to feedback from each neighboring BS to establish an uplink common control channel, and then notifies each neighboring BS of the resource allocation result of the uplink common control channel.

When it is recognized that the mobile station is located in overlapping coverage areas of two or more BSs (step S312), the serving BS of the mobile station is notified (step S313). The above identification method is similar to the method (steps S301 and S302) described in the first embodiment of the present invention, and for the sake of brevity, its detailed description is omitted here.

Finally, the serving BS notifies the mobile station to use the allocated uplink common control channel to communicate with multiple BSs (step S314).

Fig. 4a shows a flow chart of establishing a downlink common control channel according to the third embodiment of the present invention, wherein two or more adjacent BSs identify a mobile station in their overlapping coverage areas, and then establish a downlink channel for the mobile station common control channel.

As shown in Fig. 4a, the mobile station located in the overlapping area of two or more BSs is first identified (step S401), and if such a mobile station exists, the serving BS is notified (step S402). There are two possible identification methods: MS active identification or neighbor BS identification.

■MS active identification: The mobile station detects the pilot signal (preabmle) or other identification signals of the base station of the adjacent cell. When the presence of the adjacent base station is detected, the mobile station reports the detected signal, the identification of the adjacent base station and the signal quality to itself The service BS.

■Neighboring BS identification: MS sends uplink data or periodic ranging signal (periodic ranging). When MS is within the coverage of adjacent cells, neighboring BS can detect the signal, so as to know the existence of mobile stations that do not belong to itself , the neighbor BS notifies the serving BS of the detected mobile station ID and signal quality.

The serving BS negotiates with the neighbor BS to establish a downlink common control channel (step S403):

○The serving BS allocates resources (time, frequency, code and other resources) to the mobile station in the overlapping coverage area, and at the same time notifies other neighboring BSs covering the mobile station of the resource allocation situation. resources to establish a downlink common control channel, or refuse to join the downlink common control channel; or

○The serving BS first notifies the adjacent BS of the resources that can be allocated to the downlink common control channel, and the adjacent BSs select the resources that can be allocated to the downlink common control channel according to their own state information, and then feed back to the serving BS, the service The BS selects the resources that can be allocated by everyone according to the feedback from each adjacent BS to establish the downlink common control channel, and then notifies each adjacent BS of the resource allocation result of the downlink common control channel.

Finally, the serving BS informs the mobile station located in the overlapping area to receive the information on the downlink common control channel, and the serving BS and the neighbor BS covering the mobile station use the established downlink common control channel to interact with the mobile station located in the overlapping area (step S404).

Figure 4b shows a flow chart of establishing a downlink common control channel according to the fourth embodiment of the present invention, wherein two or more adjacent BSs first establish a downlink common control channel, when a mobile station enters its overlapping coverage area, Each base station communicates with the mobile station through the established downlink common control channel.

As shown in Figure 4b, regardless of whether there is a mobile station in the overlapping coverage area of two or more BSs, the adjacent BSs first negotiate to establish a downlink common control channel (step S411):

○ A BS allocates resources (time, frequency, coding, etc.) to the overlapping coverage area, and at the same time notifies other adjacent BSs related to the overlapping coverage area of the resource allocation, and the adjacent BSs allocate the same resources according to their own status information or to establish a downlink common control channel, or refuse to join the downlink common control channel; or

○A BS first notifies the adjacent BS of the resources that can be allocated to the downlink common control channel, and the adjacent BSs select the resources that can be allocated to the downlink common control channel according to their own state information, and then feed back to the BS , the one BS selects shared and allocatable resources according to feedback from each neighboring BS to establish a downlink common control channel, and then notifies each neighboring BS of the resource allocation result of the downlink common control channel.

When it is recognized that the mobile station is located in overlapping coverage areas of two or more BSs (step S412), the serving BS of the mobile station is notified (step S413). The above identification method is similar to the method (steps S401 and S402) described in the third embodiment of the present invention, and for the sake of brevity, its detailed description is omitted here.

Finally, the serving BS informs the mobile station located in the overlapping area to receive the information on the downlink common control channel, and the serving BS and the neighbor BS covering the mobile station use the established downlink common control channel to interact with the mobile station located in the overlapping area (step S414).

After the uplink/downlink common control channel is established, if the MS moves and/or the channel conditions change, it may be necessary to dynamically negotiate and adjust the common control channel, the involved MS and BS. In this case, the common control channel negotiation establishment step (S303, S311, S403 or S411) can be performed again, so as to realize the dynamic negotiation adjustment of the common control channel, the involved MS and BS; however, it should be noted that, The established common control channel is still available until the re-performed negotiation establishment step is completed.

Fig. 5 shows an example of performing fast handover by exchanging control messages using an uplink common control channel. The MS first sends an HO request with its state information in the uplink common control channel (step ①). Since this message is transmitted in the uplink common control channel, both the BS to which the MS belongs and the neighboring BSs can receive the message. Neighboring BSs that will accept the moving MS will feed back a response (step ②), which may include service level prediction, estimated HO time and HO optimization, etc. The MS obtains feedback from other BSs (possibly several) and estimates its handover destination. Then, the MS sends a handover reference with the feedback information of the neighboring BS (handover destination BS) to the BS to which it belongs (step ③). The BS to which the MS belongs sends a HO response to the MS, and at the same time sends a notification message (HO notification) to the WAC (step ④).

FIG. 6 shows a block diagram of a BS 600 proposed by the present invention.

The BS 600 according to the present invention can be used as a serving BS or a neighbor BS. For simplicity, the components of the serving BS and the neighbor BS are included in the BS 600 and described here together. However, it should be clear that the serving BS and the neighbor BS may be used independently, and may include only some of the components shown in FIG. 6 but not all of them. In addition, in order to prevent other content from making the subject of the present invention unclear, other components in the base station that are not related to the present invention are omitted here, and only components related to the present invention are shown.

As shown in Figure 6, as a serving BS, the BS 600 of the present invention may include: a receiving unit 610 for receiving a notification related to whether the MS belonging to the serving BS is in the overlapping coverage area of two or more BSs; The channel unit 620 is configured to negotiate with the neighbor BS to establish an uplink/downlink common control channel for the MSs belonging to the serving BS and located in the overlapping coverage area or for the overlapping coverage area between the serving BS and the neighbor BS; and the notification unit 630 will communicate with the uplink The information related to the /downlink common control channel is notified to the MS belonging to the serving BS and located in the overlapping coverage area.

A neighbor BS identifies an MS located in an overlapping area of two or more BSs, and notifies the serving BS of the mobile station. In order to realize the above functions, the neighboring BS may include: a neighboring cell MS detection unit 650, configured to detect uplink data or periodic ranging signals sent by the neighboring cell MS. Here, the adjacent cell MS refers to the MS in the cell where the serving BS is located. The notification unit 630 of the neighbor BS, when the neighbor cell MS detection unit 650 detects the uplink data or the periodic ranging signal sent by the neighbor cell MS, sends to the serving BS the message that the neighbor cell MS is in the overlapping coverage area of two or more BSs. Notify, and notify the serving BS of the detected MS identity and signal quality of the adjacent cell MS. In addition, if it is only used as a neighbor BS, the receiving unit 610 may be omitted, that is, the neighbor BS may only include the neighbor cell MS detection unit 650 , the common control channel unit 610 and the notification unit 630 .

The serving BS negotiates with the neighbor BS to establish an uplink/downlink common control channel:

○ The common control channel unit 620 of the serving BS performs resource allocation (time, frequency, coding, etc. resources) for MSs belonging to the serving BS 600 and located in the overlapping coverage area or for the overlapping coverage areas of the serving BS and neighbor BSs, and allocates resources The allocation result is notified to the neighbor BS covering the MS or the overlapping coverage area through the notification unit 630 . The receiving unit 610 of the neighbor BS receives the resource allocation result from the serving BS 600. The common control channel unit 620 of the neighbor BS either allocates the same resource to establish the uplink/downlink common control channel according to the status information of the neighbor BS itself, or determines that the same resource cannot be allocated and refuses to join the uplink/downlink common control channel.

or

o The common control channel unit 620 of the serving BS notifies the serving BS's own allocable resources to the covering MS or neighbor BSs related to overlapping coverage areas. The receiving unit 610 of the neighbor BS receives the notification of the available resources from the neighbor BS, and the common control channel unit 620 of each neighbor BS selects the allocated resources allowed by the neighbor BS itself, and feeds back the selection result to the serving BS through the notification unit 630 . The receiving unit 610 of the serving BS receives the feedback results of the neighbor BSs, and the common control channel unit 620 of the serving BS selects the allocatable resources allowed by all neighbor BSs for resource allocation according to the feedback results of each neighbor BS, and establishes the uplink/downlink common control channel , and notify each neighbor BS of the resource allocation result through the notification unit 630 .

In addition, the serving BS (common control channel unit 620) also dynamically negotiates and adjusts the uplink/downlink common control channel with neighbor BSs according to at least one of the movement of the MS and channel condition changes; and notifies the uplink/downlink The change of the common control channel is notified to neighbor BS and MS.

As shown in Figures 3a-4b, the present invention can also adopt another identification method: MS active identification. For this purpose, a mobile station according to the invention may be as shown in FIG. 7 .

FIG. 7 shows a block diagram of the MS 700 proposed by the present invention.

As shown in Figure 7, the MS 700 according to the present invention includes: a neighbor cell BS detection unit 710, which is used to detect the pilot signal or other identification signal of the neighbor cell BS; a judgment unit 720, which is used to or other identification signals to determine whether the adjacent cell BS exists; and the notification unit 730 is configured to send a notification that the MS is in the overlapping coverage area of two or more BSs to its own serving BS when it is determined that the adjacent cell BS exists, And report the detected signal, neighbor cell BS identity and signal quality to its own serving BS. Here, the expression of neighbor cell BS is equivalent to neighbor BS.

So far the invention has been described with reference to the preferred embodiments. It should be understood that various other changes, substitutions and additions can be made by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, the scope of the present invention is not limited to the specific embodiments described above, but should be defined by the appended claims.

Claims (29)

1. A method for sharing common control channels by multiple base stations, comprising the following steps: Identifying mobile stations within the overlapping coverage areas of two or more base stations; notifying a serving base station of the mobile station that the mobile station is within an overlapping coverage area; The serving base station negotiates with neighbor base stations covering the mobile station to establish a common control channel; and The serving base station notifies the mobile station of information related to the common control channel. 2. A method for sharing a common control channel by multiple base stations, comprising the following steps: Adjacent base stations negotiate to establish a common control channel; Identifying mobile stations within the overlapping coverage areas of two or more base stations; notifying a serving base station of the mobile station that the mobile station is within an overlapping coverage area; and The serving base station notifies the mobile station of information related to the common control channel. 3. The multi-base station method for sharing a common control channel according to claim 1 or 2, wherein the step of identifying the mobile station in the overlapping coverage area of two or more base stations comprises: The mobile station detects pilot signals or other identification signals of base stations in adjacent cells; According to the detected pilot signal or other identification signal, determine whether the adjacent base station exists; and When it is determined that a neighboring base station exists, the mobile station reports the detected signal, the identity of the neighboring base station and the signal quality to its own serving base station. 4. The multi-base station method for sharing a common control channel according to claim 1 or 2, wherein the step of identifying the mobile station in the overlapping coverage area of two or more base stations comprises: The mobile station sends uplink data or periodic ranging signals; The base station in the adjacent cell of the mobile station detects the uplink data or the periodic ranging signal sent by the mobile station; When the base station in the adjacent cell of the mobile station detects the uplink data or periodic ranging signal sent by the mobile station, the base station in the adjacent cell of the mobile station will detect the detected mobile station The mobile station identity and signal quality are notified to the serving base station of the mobile station. 5. The method for sharing a common control channel among multiple base stations according to claim 1, wherein the step of establishing a common control channel through negotiation between the serving base station and the neighbor base station covering the mobile station comprises: The serving base station performs resource allocation for the mobile station, and at the same time notifies a neighbor base station covering the mobile station of the resource allocation result; and The neighbor base stations allocate the same resources according to their state information, and establish the common control channel. 6. The method for sharing a common control channel among multiple base stations according to claim 5, wherein the step of establishing a common control channel through negotiation between the serving base station and the neighbor base station covering the mobile station further comprises: The neighbor base station determines that the same resource cannot be allocated according to its own state information, and refuses to join the common control channel. 7. The method for sharing a common control channel among multiple base stations according to claim 1, wherein the step of establishing a common control channel through negotiation between the serving base station and a neighboring base station covering the mobile station comprises: The serving base station notifies the neighboring base stations covering the mobile station of its own allocable resources; The neighbor base stations select their respective allowed allocatable resources, and feed back to the serving base station; and The serving base station selects the allocatable resources commonly allowed by all neighbor base stations for resource allocation according to the feedback results of each neighbor base station, establishes the common control channel, and notifies each neighbor base station of the resource allocation result. 8. The method for sharing a common control channel among multiple base stations according to claim 2, wherein the step of establishing a common control channel through negotiation between adjacent base stations comprises: A base station performs resource allocation for the overlapping coverage area, and simultaneously notifies the resource allocation result to neighboring base stations related to the overlapping coverage area; and The neighbor base stations allocate the same resources according to their state information, and establish the common control channel. 9. The method for sharing a common control channel by multiple base stations according to claim 8, wherein the step of establishing a common control channel through negotiation between adjacent base stations also includes: The neighbor base station determines that the same resource cannot be allocated according to its own state information, and refuses to join the common control channel. 10. The method for sharing a common control channel among multiple base stations according to claim 2, wherein the step of establishing a common control channel through negotiation between adjacent base stations comprises: A base station notifies other neighboring base stations of its own allocable resources; The neighboring base stations select their respective allowed allocatable resources, and feed back to the one base station; and According to the feedback results of each neighboring base station, the one base station selects the allocatable resources commonly allowed by all neighboring base stations for resource allocation, establishes the common control channel, and notifies each neighboring base station of the resource allocation result. 11. The method for sharing a common control channel among multiple base stations according to any one of claims 5-10, wherein the resources include at least one of time resources, frequency resources and coding resources. 12. The method for sharing a common control channel among multiple base stations according to claim 1 or 2, characterized in that the common control channel is an uplink common control channel. 13. The method for sharing a common control channel among multiple base stations according to claim 12, further comprising: The mobile station uses the established uplink common control channel to communicate with various base stations overlapping and covering the mobile station. 14. The method for sharing a common control channel among multiple base stations according to claim 1 or 2, characterized in that the common control channel is a downlink common control channel. 15. The method for sharing a common control channel among multiple base stations according to claim 14, further comprising: The mobile station receives information on the established downlink common control channel; and Each base station overlapping the mobile station communicates with the mobile station using the established downlink common control channel. 16. The method for sharing a common control channel among multiple base stations according to any one of claims 1 to 15, further comprising: The serving base station and the neighbor base station dynamically negotiate and adjust the common control channel according to at least one of the movement of the mobile station and channel condition changes; and The serving base station is responsible for notifying the neighbor base stations and the mobile station of the change of the common control channel. 17. A base station, comprising: a receiving unit for receiving a notification as to whether a mobile station belonging to said base station is within the overlapping coverage area of two or more base stations; A common control channel unit, configured to negotiate with neighboring base stations to establish a common control channel for mobile stations belonging to the base station and located in overlapping coverage areas or for overlapping coverage areas between the base station and neighboring base stations; and A notifying unit notifies the mobile station belonging to the base station and located in the overlapping coverage area of the information related to the common control channel. 18. The base station according to claim 17, further comprising: The adjacent cell mobile station detection unit is used to detect the uplink data or periodic ranging signal sent by the adjacent cell mobile station, and the adjacent cell mobile station represents the mobile station in the adjacent cell, Wherein the notification unit is also used to send the adjacent cell serving base station to the adjacent cell serving base station when the adjacent cell mobile station detection unit detects the uplink data or the periodic ranging signal sent by the adjacent cell mobile station. or multiple base stations in the overlapping coverage area, and notify the adjacent cell serving base station of the detected mobile station identity and signal quality of the adjacent cell mobile station, and the adjacent cell serving base station indicates that the adjacent cell Cell The base station to which the mobile station belongs. 19. The base station according to claim 17, characterized in that For the mobile station belonging to the base station and located in the overlapping coverage area or for the overlapping coverage area between the base station and the neighbor base station, the common control channel unit performs resource allocation, and at the same time notifies the resource allocation result to the coverage area through the notification unit Neighboring base stations of the mobile station or the overlapping coverage area. 20. The base station according to claim 19, characterized in that The receiving unit also receives resource allocation results from neighboring base stations, The common control channel unit allocates the same resource according to the state information of the base station itself, and establishes the common control channel. 21. The base station according to claim 20, characterized in that The common control unit determines that the same resource cannot be allocated according to the state information of the base station itself, and refuses to join the common control channel. 22. The base station according to claim 17, characterized in that The common control channel unit notifies the allocatable resources of the base station itself to neighbor base stations covering the mobile station or related to the overlapping coverage area; The receiving unit receives the feedback result of the neighbor base station; and The common control channel unit selects the allocatable resources jointly allowed by all neighboring base stations for resource allocation according to the feedback results of each neighboring base station, establishes the common control channel, and notifies each neighboring base station of the resource allocation result through the notification unit . 23. The base station according to claim 22, characterized in that The receiving unit also receives an allocatable resource notification from a neighbor base station; The common control channel unit selects the allocated resources allowed by the base station itself, and feeds back the selection result to the neighboring base stations through the notification unit. 24. The base station according to any one of claims 19-23, characterized in that The resources include at least one of time resources, frequency resources and coding resources. 25. The base station according to claim 17, characterized in that the common control channel is an uplink common control channel. 26. The base station according to claim 17, wherein the common control channel is a downlink common control channel. 27. The base station according to claim 26, characterized in that the base station communicates with the mobile station using an established downlink common control channel. 28. The base station according to any one of claims 17-27, characterized in that The common control channel unit dynamically negotiates and adjusts the common control channel with neighboring base stations according to at least one of the movement of the mobile station and channel condition changes; and The notification unit notifies the neighbor base station and the mobile station of the change of the common control channel. 29. A mobile station comprising: The adjacent cell base station detection unit is used to detect the pilot signal or other identification signals of the adjacent cell base station; A judging unit, configured to judge whether the base station of the neighboring cell exists according to the detected pilot signal or other identification signal; and The notification unit is used to send a notification to its own serving base station that the mobile station is in the overlapping coverage area of two or more base stations when it is determined that the base station of the neighboring cell exists, and send the detected signal, the identity of the neighboring cell base station and the signal The quality reports to its own serving base station.

Images