WO2008009229A1

WO2008009229A1 - A communication method, system and base station between the cells in the fixed wireless regional area network

Info

Publication number: WO2008009229A1
Application number: PCT/CN2007/070259
Authority: WO
Inventors: Rui Wang; Tianyu Wu; Jianneng Liu; Shukun Zheng; Weihao Miu; Linjun Lv
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-07-11
Filing date: 2007-07-10
Publication date: 2008-01-24
Also published as: CN100596230C; CN101106804A

Abstract

A communication method between the cells in the fixed wireless regional area network (WRAN) includes: a WRAN entity of the first cell registers in the base station of the second cell, and the register information is recorded in the base station of the second cell; the WRAN entity of the first cell sends the communication information between the cells to the base station of the second cell. Two communication systems between the cells in WRAN and a communication base station between the cells in WRAN are disclosed. By using the present invention, the reliable communication between the cells is realized depending on the connected links, and the IEEE 802.22 frame structure is not necessary to be modified in the present invention and it is convenient for application.

Description

Inter-cell communication method, system and base station for fixed wireless area network

Technical field

The present invention relates to the field of fixed wireless area network (WRAN) technology, and more particularly to an inter-cell communication method, communication system and base station of WRAN. Background of the invention

In October 2004, the IEEE, Institute of Electrical and Electronics Engineers officially established the IEEE802.22 working group, and IEEE802.22 was named WRAN. The purpose of this working group is to use cognitive radio technology to find the free frequency band of the licensed user (LU, Licence User) for communication. For example, in a licensed band such as VTV (VHF, Very High Frequency/UHF, Ultra High Frequency) of a digital television (DTV, Digital Television), an unoccupied frequency band is searched for as a bearer band of the WRAN network.

The WRAN network is an emerging network technology that provides high-bandwidth and wide-area coverage for remote, low-density population areas. The WRAN system is a license-exempt operation system, that is, the WRAN system operator can communicate using the idle frequency band of the LU without permission. Moreover, WRAN systems are also exempt from licensing, ie multiple WRAN system operators can use the idle band of the same LU. When one or more WRAN systems are using the same idle frequency band, spectrum planning is not performed for each cell, and thus self-interference may occur due to the use of the same frequency band between adjacent cells. For example, there may be self-interference between base stations (BS, Base Station) of neighboring cells in the WRAN system.

In order to reduce the self-interference of the WRAN system, it is necessary to pair the frames of the neighboring cells. Qi, so that the downlink frames between cells can be synchronized, thereby reducing signal interference in different directions between cells. For example, in a WRAN system that currently uses Orthogonal Frequency Division Multiplexing (OFDM) technology based on Time Division Duplex (TDDD), including a BS and a client CPE, Consumer Premise Equipments) Two WRAN entities. Each frame structure of the WRAN system is divided into two sub-frames, one downlink sub-frame and one uplink sub-frame, separated by a guard time. For example, TRG or sliding self-coexistence time slot can be inserted. (SSS, Sliding Self-coexistence Slots) „ In order to synchronize the downlink frames between cells, a preamble (Preamble) for synchronization and signal estimation is included in the downlink subframe, and the CPE can be synchronized by using the preamble. And the signal estimation; then the Frame Control Header (FCH), which is used to carry information about the current frame, such as whether the current frame includes an uplink mapping (US-MAP, Upstream-MAP) message, and a downlink mapping (DS-MAP). , Upstream-MAP ) message, Uplink Control Descriptor (UCD) message, downlink control description DCD, Downlink Control Descriptor) message, etc., wherein the US-MAP and DS-MAP messages are respectively used to allocate downlink and uplink channels to each CPE. The self-interference of WRAN is further deteriorated with the coverage area of the WRAN system, in order to avoid The downlink of another cell causes interference, and the CPE can also transmit data by using a directional antenna on the uplink.

In addition, in the IEEE 802.22 standard, a self-coexistence mechanism for exchanging self-coexistence information between base stations is also employed to reduce the self-interference of WRAN. Broadly speaking, self-coexistence refers to the coexistence of other overlapping cells in the same wireless system, which is a key issue in wireless communication technologies operating in unlicensed bands. When multiple BSs of 802.22 work in one overlapping area, since the base stations may belong to different operators and cannot cooperate and frequency plan, the self-coexistence problem caused by the self-interference phenomenon is particularly prominent. Because of these characteristics, 802.22 faces a severe test of how to solve the problem of self-coexistence. In other IEEE 802 standards, Self-coexistence is considered after the specification is completed, and IEEE 802.22 adopts a forward-looking approach (as stated in the standard requirements document). The mandatory medium access control (MAC, Medium Access Control) protocol layer must contain self-coexistence. Protocols and algorithms to the original standard concepts and definitions. In the IEEE 802.22 standard, different self-coexistence mechanisms are used to solve self-coexistence issues, such as ODSC (On-Demand Spectrum Connection) algorithms and lease-based protocols based on credit characterization. In these self-coexistence mechanisms, self-coexistence information is exchanged between base stations. Since this information is very important for the self-coexistence mechanism, it is required to be able to transmit this information reliably.

Due to the importance of communication between cells, in the current draft IEEE 802.22 specification, two methods are proposed to implement inter-cell communication, respectively, through self-coexistence beacon messages (CBP, Coexistence Beacon Protocol) and The control head (SCH, Superframe Control Header) implements inter-cell communication.

For the manner in which inter-cell communication is implemented by the SCH, the MAC implements communication between different cell base stations by allowing the BS and the CPE to detect and accept the SCH from the cooperative base station. Specifically, the BS of the local cell can broadcast the SCH to different cells; the coordinated base station in the coordinated cell can periodically listen or schedule the downlink and uplink of each frame quiet time (QP, quiet periods) in its coverage. The SCH broadcasted by the base station of the own cell is detected. Here, the coordinated cell refers to a neighboring cell that coexists with the own cell.

The disadvantages of this approach are: First, this method can only broadcast SCH to different cells. In other words, this method cannot transmit other information than the SCH. In addition, when the BS of the local cell broadcasts the SCH, the BSs or CPEs of the coordinated cell may have no gap detection for the SCH, and this problem is particularly prominent when different cells are not synchronized. Therefore, the manner of communication between such cells cannot ensure reliable reception of the SCH, and thus cannot provide a reliable communication link between WRAN entities, and cannot guarantee the reliability of communication between cells.

In the way that the cell implements communication through CBP, the WRAN entity, that is, the CPEs When the BSs need to communicate with the coordinated cell, the CBP packet can be sent, and the CBP packet is used to establish contact with the WRAN entity of other cells, and can provide sufficient information for other cells to achieve good coexistence between the WRAN entity and the overlapping 802.22 cells. In order to increase the probability that the coordinated 802.22 cell receives the CBP packet as much as possible, the CPE in the coordinated cell is not locked in the cooperative BS in one frame time, but is locked when it is scheduled to receive or send data to the cooperative BS. On the cooperative BS, and at other times of the frame, the CPEs in the coordinated cell must listen for and search for CBP packets, and the CPEs that receive the CBP packets must report these packets to the cooperative BS.

However, this method still has the disadvantage that the CBP packet cannot be reliably received. First, if a WRAN entity of a cell 1, such as a CPE or a BS, transmits a CBP packet to another cell 2, the CPEs or BSs of the cell 2 are transmitting. When the data is not available, the CBP packet cannot be received at the same time, and thus it cannot be ensured that there is a WRAN entity in the cell 2 waiting for this packet. Moreover, even if the CPEs or BSs of cell 2 are able to detect the CBP packet of cell 1, it cannot determine which channel and which time slot the packet is transmitted on; in addition, there may be multiple overlapping cells of different operators. Even if the CPEs or BSs of the cell 2 know the working channels of all other overlapping cells, it is not possible to predict in advance when the cell 1 transmits the CBP packet to the CPEs or BSs of the cell 2, so that it is possible to schedule the detection of other cells other than the cell 1. Therefore, the reliability of the inter-cell communication method through CBP cannot be guaranteed, and the reliable communication link between WRAN entities cannot be provided.

In summary, the current method for implementing inter-cell communication cannot provide a reliable communication link between WRAN entities between cells, and thus the reliability of communication between cells is poor. Summary of the invention

The embodiment of the invention provides a WRAN inter-cell communication method, which can provide a reliable communication link between WRAN entities between cells, thereby improving communication between cells. Rely on sex.

The embodiments of the present invention propose two WRAN inter-cell communication systems, which can provide a reliable communication link between inter-cell WRAN entities, thereby improving the reliability of communication between cells.

The embodiment of the present invention further provides a base station for inter-cell communication of WRAN, which can provide a reliable communication link between WRAN entities between cells, thereby improving the reliability of communication between cells.

To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows: A WRAN inter-cell communication method includes:

The WRAN entity of the first cell registers with the base station of the second cell, and the base station of the second cell in the registration information record;

The WRAN entity of the first cell sends an inter-cell communication message to the base station of the second cell.

A WRAN inter-cell communication system, the system comprising a first base station of a first cell and a second base station of a second cell, wherein:

The first base station of the first cell is located within the service range of the second base station of the second cell, is registered by the second base station of the second cell, and sends an inter-cell communication message to the second base station of the second cell;

The second base station of the second cell records the registration information of the first base station of the first cell, and receives the inter-cell communication message sent by the first base station of the first cell.

A WRAN inter-cell communication system, the system comprising a second base station of a second cell and a CPE within a common coverage of the first cell and the second cell, wherein

The CPE registers with the second base station of the second cell, and sends an inter-cell communication message to the second base station of the second cell;

The second base station of the second cell records the registration information of the CPE, and receives the information from the CPE. Inter-cell communication message.

A base station for inter-cell communication of a WRAN, the base station comprising:

The registration information generating module generates registration information for registration by the base station of the coordinated cell, and the registration information sending module sends the registration information generated by the registration information generating module to the base station in the coordinated cell.

As can be seen from the foregoing technical solutions, the inter-cell communication method, the communication system, and the base station of the WRAN provided by the embodiment of the present invention are recorded by the base station of the second cell by registering the WRAN entity of the first cell to the base station of the second cell. The registration information of the WRAN entity of the first cell, so that when the WRAN entity of the first cell sends an inter-cell communication message to the base station of the second cell, the base station of the second cell can identify the registration information of the WRAN entity of the first cell. The WRAN entity of the first cell can establish a connection-based link between WRAN entities, and thus can promote reliable communication between cells. The embodiment of the present invention does not need to modify the IEEE 802.22 frame structure, which is very convenient for application. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a flow chart of an inter-cell communication method of WRAN according to a first exemplary embodiment of the present invention.

2 is a schematic diagram of an inter-cell communication system of a WRAN according to a second exemplary embodiment of the present invention.

3 is a schematic diagram of an inter-cell communication system of a WRAN according to a third exemplary embodiment of the present invention.

Figure 4 is a schematic diagram of communication between BS1 and CPE1 in Figure 3.

FIG. 5 is a schematic structural view of BS1 of FIG. 2. Mode for carrying out the invention

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

In the embodiment of the present invention, in order to solve the reliability communication between cells, a cell

The BS or CPEs are registered to the BSs of another cell, and the operators between the cells may not be the same. In this way, the registered BSs or CPEs can establish a connection with the coordinated BS, just like ordinary users register on these coordinated BSs. The coordinated BSs record the registration information of the registered BS and CPE so that they can be uniquely identified, thereby distinguishing these users from other ordinary users.

1 is a flow chart of an inter-cell communication method of WRAN in accordance with a first exemplary embodiment of the present invention. As shown in Figure 1, the method includes:

Step 101: Register a WRAN entity of the first cell to a base station of the second cell, and record, by the base station of the second cell, registration information of the WRAN entity of the first cell.

Step 102: The WRAN entity of the first cell sends an inter-cell communication message to the base station of the second cell, where the base station of the second cell identifies the WRAN entity of the first cell according to the registration information of the WRAN entity of the first cell.

In step 101, the registration information of the WRAN entity of the first cell may be the MAC address of the WRAN entity of the first cell, or may be the connection identifier CID assigned to the WRAN entity of the first cell. More preferably, the CID here can be either a management CID or a service CID. It can be seen that the above registration information is a unique identifier of the WRAN entity that distinguishes the first cell.

The base station of the second cell in step 102 can identify the WRAN entity of the first cell according to the registration information, that is, discover the WRAN entity of the first cell according to the registration information, so as to establish a connection with the WRAN entity of the first cell. The link further ensures the reliability of inter-cell communication. In the above process, the WRAN entity of the first cell may be the base station of the first cell, or may be the CPE within the common coverage of the first cell and the second cell, and where the base station of the first cell is When the base station of the second cell communicates, it can be regarded as the CPE of the second cell, and performs the same function as the ordinary CPE of the second cell.

When the WRAN entity of the first cell is the base station of the first cell, in step 101, the base station of the first cell is registered to the base station of the second cell, and the base station of the second cell records the first cell. In step 102, first, the base station of the first cell synchronizes with the base station of the second cell, where the synchronization is mainly completed: searching for a base station channel and synchronizing with a base station MAC of the second cell, for example, The 802.22 protocol can be used to synchronize the synchronization between the network entry and the initialization (network entry and initialization). Specifically, the method includes: searching for a SCH sent by a base station, detecting a channel that is not occupied by an LU user according to the SCH; searching for a DS-MAP MAC management message, and obtaining, by the CPE, a MAC synchronization when receiving the DS-MAP message; scanning an uplink channel in the UCD message a process of transmitting a parameter, etc.; then, the base station of the first cell sends an inter-cell communication message to the base station of the second cell, where the base station of the second cell bases the base station of the first cell according to the recorded registration information of the base station of the first cell Identifying, and allocating, for the base station of the first cell, the bandwidth for transmitting the inter-cell communication message, that is, in the process of receiving the inter-cell communication message by the base station of the second cell, the base station of the second cell according to the recorded first cell The registration information of the base station identifies the base station of the first cell. Preferably, after receiving the inter-cell communication message, the base station of the second cell sends a response message to the base station of the first cell.

When the WRAN entity of the first cell is a CPE within the common coverage of the first cell and the second cell, in step 101, the CPE is registered to the base station of the second cell, and the base station of the second cell records The registration information of the CPE; in step 102, first, the base station of the first cell sends an inter-cell communication request to the CPE, where the inter-cell communication request includes the inter-cell communication message; and then the CPE performs with the base station of the second cell. Synchronization, CPE to the first The base station of the second cell sends the inter-cell communication message, where the base station of the second cell identifies the CPE according to the recorded registration information of the CPE, and allocates a bandwidth for transmitting the inter-cell communication message to the CPE.

Preferably, after receiving the inter-cell communication request, the CPE sends a response message to the base station of the first cell.

Similarly, after receiving the inter-cell communication message, the base station of the second cell sends a feedback message to the CPE; then, the CPE synchronizes with the base station of the first cell, and carries the feedback message in the report message. To the base station of the first cell.

More preferably, after receiving the report message, the base station of the first cell sends an acknowledgement message to the CPE.

The above describes the process in which the WRAN entity of the first cell transmits an inter-cell communication message to the base station of the second cell. Based on the same principle, the WRAN entity of the second cell can also send an inter-cell communication message to the base station of the first cell.

For example, in step 101, the method further includes: registering a WRAN entity of the second cell to a base station of the first cell, and recording, by the base station of the first cell, registration information of the WRAN entity of the second cell;

In step 102, the method further includes: the WRAN entity of the second cell sending an inter-cell communication message to the base station of the first cell, where the base station of the first cell is configured according to the registration information of the WRAN entity of the second cell to the second cell The WRAN entity identifies it.

Similarly, in a process in which the WRAN entity of the second cell sends an inter-cell communication message to the base station of the second cell, the WRAN entity of the second cell may be the base station of the second cell, or may be the first cell and the second CPE within the common coverage of the community.

When the WRAN entity of the second cell is the base station of the second cell, the method includes, in step 101, registering, by the base station of the second cell, the base station of the first cell, and recording, by the base station of the first cell, the second Registration information of the base station of the cell; in step 102, including: second small The base station of the area is synchronized with the base station of the first cell, and then the base station of the second cell sends an inter-cell communication message to the base station of the first cell, where the base station of the first cell according to the recorded registration information of the base station of the second cell The base station of the second cell performs identification, and allocates a bandwidth for transmitting the inter-cell communication message to the base station of the second cell.

When the WRAN entity of the second cell is a CPE within the common coverage of the first cell and the second cell, the method includes, in step 101, registering the CPE to a base station of the first cell, and the base station of the first cell. Recording the registration information of the CPE; in step 102, the base station of the second cell sends an inter-cell communication request to the CPE, where the inter-cell communication request includes the inter-cell communication message; and then, the CPE and the base station of the first cell Synchronizing, the CPE sends the inter-cell communication message to the base station of the first cell, where the base station of the first cell identifies the CPE according to the recorded registration information of the CPE, and allocates and transmits the inter-cell to the CPE. The bandwidth of the communication message.

Preferably, after receiving the inter-cell communication request, the CPE sends a response message to the base station of the second cell.

More preferably, after receiving the inter-cell communication message, the base station of the first cell sends a feedback message to the CPE; then, the CPE synchronizes with the base station of the second cell, and carries the feedback message in the report message and sends it to the report message. The base station of the second cell; after receiving the report message, the base station of the second cell sends an acknowledgement message to the CPE.

In the above process, the small-area communication message is preferably a self-coexistence message, a cell negotiation message, or a cell synchronization message of the cell.

2 is a schematic diagram of an inter-cell communication system of a WRAN according to a second exemplary embodiment of the present invention. As can be seen from Fig. 2, BS1 is within the communication range of BS2, so BS1 can directly register with BS2 according to the above description, and implement inter-cell communication with BS2. A WRAN inter-cell communication system, including BS1 and BS2, where:

BS1, located within the service scope of BS2, used to register with BS2 and send to BS2 Small interval communication message;

BS2, configured to record registration information of the BS1, and identify the BS1 according to the registration information of the BS1 in the process of receiving the inter-cell communication message, and allocate a bandwidth for transmitting the inter-cell communication message to the BS1. .

3 is a schematic diagram of an inter-cell communication system of a WRAN according to a third exemplary embodiment of the present invention. It can be seen from FIG. 3 that BS1 is outside the communication range of BS2, but CPE1 is within the common coverage of BS1 and BS2, and CPE1 is the user of BS1, so CPE1 can be registered on BS2, so that BS2 and BS1 can be implemented by CPE1. Small interval communication. A WRAN inter-cell communication system, the system comprising BS1, BS2 and CPE1 within the common coverage of the first cell and the second cell

The BS1 is configured to send an inter-cell communication request to the CPE1, where the inter-cell communication request includes the inter-cell communication message.

CPE1, configured to register with BS2, and send the inter-cell communication message to BS2;

BS2, configured to record the registration information of the CPE1, and identify the CPE1 according to the recorded registration information of the CPE1 in the process of receiving the inter-cell communication message, and allocate the CPE1 to transmit the inter-cell communication message. bandwidth.

The communication process of FIG. 3 will be described in detail below. In Figure 3, CPE1 is a user of BS1 and is located within the service areas of BS1 and BS2. If BS1 wants to send a self-coexistence message to BS2, it may first send a self-coexistence message to CPE1 and allocate CPE1 and BS2 for communication. In this embodiment, it is assumed that CPE1 has been registered in BS2 in advance, and CPE1 reports to BS1 that it has registered with BS2. Happening. Then, CPE1 starts synchronizing and communicating with BS2 just like the ordinary user of BS2; then, CPE1 synchronizes with BS1 and reports back. Since all communications are connection oriented, the link between BS1 and BS2 is reliable. The synchronization process between the CPE and the base station adopts the 802.22 protocol for synchronizing in the process of network entry and initialization. The method includes: searching for a channel of the base station; once receiving the SCH sent by the base station, determining that the channel does not affect the LU user is allowed to be used; the CPE and the base station establish MAC synchronization; and obtaining a sending parameter of the base station from the UCD message; Ranging to scan the downstream channel and negotiate basic functions with the base station.

This process will be described in detail below with reference to the accompanying drawings. Figure 4 is a schematic diagram of communication between BS1 and CPE1 in Figure 3. As shown in Figure 4,

First, BS1 sends a BSS-REQ request message to CPE1, and the BSS-REQ request message carries an inter-cell communication message that BS1 wishes to send to BS2, and the inter-cell communication message may include a cell self-coexistence message, a cell negotiation message, or a cell synchronization message. Wait;

After CPE1 receives the BSS-REQ request message, CPE1 sends a response message (BSS-RSP response message) to BS1 to inform BS1 that it has successfully received the BSS-REQ request message;

Then, CPE1 starts to synchronize with BS2. During the synchronization process, the operation of CPE1 and the ordinary CPE of BS2 perform the same operation in the synchronization phase; since each CPE has unique registration information, such as a MAC address or a CID assigned to the CPE, BS2 can discover the arrival of a special client device CPE1, and then allocate bandwidth to CPE1, which transmits the inter-cell communication message to BS2.

BS2 can also transmit feedback information to CPE1, and then CPE1 and BS1 re-synchronize, send a report message (BSS-REP report message) to BS1, and the feedback information can be included in the report message;

BS1 resends the acknowledgment message (BSS-ACK) to CPE1, thus completing a complete communication process between the base stations.

It can be seen that, in the embodiment of the present invention, four MAC management messages, which are a BSS-REQ request message, a BSS-RSP response message, a BSS-REP report message, and a BSS-ACK acknowledge message, may be added. Those skilled in the art will be aware of the settings for these messages. It is merely exemplary and is not intended to limit the scope of the invention.

The following describes the structure of the BSS-REQ request message, the BSS-RSP response message, the BSS-REP report message, and the BSS-ACK confirmation message, respectively. Those skilled in the art will also appreciate that these message structures are also merely exemplary and are not intended to limit the scope of the invention.

Table 1 is an exemplary message format table of BSS-REQ request messages.

Table 1

Table 2 is an exemplary message format table for BSS-RSP response messages.

Table 2 Table 3 is an exemplary message format table for the BSS-REP report message.

table 3

Table 4 is an exemplary message format table for the BSS-ACK acknowledgment message.

Table 4

As shown in FIG. 5, BS1 in FIG. 2 includes a registration information generating module 501 and a registration information transmitting module 502.

The registration information generating module 501 generates registration information registered in BS2, that is, registration information of BS1 recorded in BS2;

The registration information transmitting module 502 transmits the registration information generated by the registration information generating module 501 to the base station BS2 in the coordinated cell.

In summary, in the embodiment of the present invention, reliable communication between cells is promoted based on the link of the connection; and no modification to the IEEE 802.22 frame structure is required, but only some MAC management messages are added, so it is very convenient. use. The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for inter-cell communication of a fixed wireless area network WRAN, the method comprising:

The WRAN entity of the first cell registers with the base station of the second cell, and the registration information is recorded in the base station of the second cell;

The inter-cell communication method of the WRAN according to claim 1, wherein the transmitting, by the WRAN entity of the first cell, the inter-cell communication message to the base station of the second cell comprises: a WRAN entity of the first cell and a second The base station of the cell performs synchronization; the WRAN entity of the first cell sends an inter-cell communication message to the base station of the second cell according to the transmission bandwidth allocated by the base station of the second cell for the inter-cell communication message.

The WRAN inter-cell communication method according to claim 1 or 2, wherein the WRAN entity of the first cell is a base station of the first cell.

The inter-cell communication method of the WRAN according to claim 3, wherein the base station of the first cell sends an inter-cell communication message to the base station of the second cell, further comprising: The base station receives a response message sent by the base station of the second cell.

The WRAN inter-cell communication method according to claim 1 or 2, wherein the WRAN entity of the first cell is a client device CPE within a common coverage area of the first cell and the second cell.

The inter-cell communication method of the WRAN according to claim 5, wherein the CPE of the first cell further includes: the base station of the first cell sends the inter-cell communication to the CPE after the base station of the second cell registers Requesting, the inter-cell communication request includes the Small interval communication message.

The inter-cell communication method of the WRAN according to claim 6, wherein the receiving, by the CPE, the inter-cell communication request further comprises: sending a response message to the base station of the first cell.

The inter-cell communication method of the WRAN according to claim 5, wherein after the CPE sends the inter-cell communication message to the base station of the second cell, the method further includes: the CPE receiving the second cell The feedback message sent by the base station.

The inter-cell communication method of the WRAN according to claim 8, wherein, after receiving the feedback message, the CPE further includes: the CPE is synchronized with a base station of the first cell, and the feedback is The message carries the base station sent to the first cell in the report message.

The inter-cell communication method of the WRAN according to claim 9, wherein after the CPE sends the report message to the base station of the first cell, the method further includes: the CPE receiving the first A confirmation message sent by the base station of the cell.

The inter-cell communication method of the WRAN according to claim 1 or 2, wherein the registration information of the WRAN entity of the first cell is:

The first '■!, the MAC address of the WRAN entity of the zone, or the connection identifier CID assigned to the WRAN entity of the first '■!, zone.

The WRAN inter-cell communication method according to claim 11, wherein the CID is: a management CID or a service CID.

The inter-cell communication method of the WRAN according to claim 1, wherein the inter-cell communication message is a cell self-coexistence message, a cell negotiation message, or a cell synchronization message.

A WRAN inter-cell communication system, characterized in that the system comprises a first base station of a first cell and a second base station of a second cell, wherein: The first base station of the first cell is located within the service range of the second base station of the second cell, is registered by the second base station of the second cell, and sends an inter-cell communication message to the second base station of the second cell;

An inter-cell communication system of the WRAN, the system comprising: a second base station of the second cell and a CPE within a common coverage of the first cell and the second cell, where

The second base station of the second cell records the registration information of the CPE, and receives the inter-cell communication message from the CPE.

The WRAN inter-cell communication system according to claim 15, wherein the system further comprises:

The first base station of the first cell, the first base station of the first cell sends an inter-cell communication request to the CPE, and the inter-cell communication request includes the inter-cell communication message.

A base station for inter-cell communication of a WRAN, the base station includes: a registration information generating module, generating registration information registered by a base station of the coordinated cell; and a registration information sending module, transmitting the information to the base station in the coordinated cell The registration information generated by the registration information generating module.