WO2008000180A1

WO2008000180A1 - Method and system for harmonizing multimedia broadcast/multicast service resource in neighbor cells

Info

Publication number: WO2008000180A1
Application number: PCT/CN2007/070138
Authority: WO
Inventors: Peng Lin
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-06-20
Filing date: 2007-06-20
Publication date: 2008-01-03
Also published as: CN101094216A; CN101094216B

Abstract

A method for harmonizing MBMS services resource in neighbor cells, which includes the steps of: sending MBMS services resource request message to the first Co-ordinating Function, which corresponds to the first gateway that the base station of the first cell belongs to; receiving response message with resource harmonizing results acquired by the first Co-ordinating Function based on the resource state of the two neighbor cells; and adjusting the MBMS services resource in the first cell according to the response message. The present invention utilizes the interaction between the base stations of the neighbor cells and the Co-ordinating Function corresponding to the gateway to adjust MBMS services resource in neighbor cells, so that the same MBMS services can be transmitted in same resource within the neighbor cells and the interference, exiting in air interface combination at the boarder of neighbor cells, can be consequently eliminated.

Description

Method and system for coordinating multimedia broadcast/multicast service resources of adjacent cells

The present invention relates to the field of multi-carrier technology, and in particular, to a method and system for coordinating multimedia broadcast/multicast service resources of adjacent cells. Background of the invention

Since the 1990s, multi-carrier technology has become a hotspot technology for broadband wireless communication. The basic idea is to divide a wideband carrier into multiple subcarriers and simultaneously transmit data on multiple subcarriers. In most system applications, the width of the subcarriers is smaller than the coherence bandwidth of the channel, such that the fading on each subcarrier is flat fading on the frequency selective channel, thereby reducing crosstalk between symbols and eliminating the need for complex channel equalization. Suitable for high speed data transmission.

Orthogonal Frequency Division Multiplexing (OFDM) technology is a relatively representative technique in multi-carrier technology. It divides a given channel into many orthogonal subchannels in the frequency domain and allows subcarrier frequency. Partially overlapping, the data signals can be separated from the aliased subcarriers as long as the subcarriers are orthogonal to each other. A basic OFDM modulation and demodulation process is shown in Figure 1. Referring to Figure 1, in an OFDM system, user data is first subjected to channel coding and interleaving, and a modulation method such as two-phase phase shift keying (BPSK) is employed. ), four-phase phase shift keying (QPSK), quadrature amplitude modulation (QAM), etc. form symbols, which are modulated onto the radio frequency after OFDM operation. In OFDM operation, when transmitting data, the symbols are first serial/parallel converted to form a plurality of low-speed sub-data streams, and then each data stream is passed through an inverse discrete Fourier transform (IDFT) or an inverse fast Fourier transform (IFFT). ) respectively mapped to a subcarrier, plus a cyclic prefix (CP) as a guard interval, and parallel/serial conversion; the process of receiving data is the opposite of sending data, first removing the cyclic prefix and performing serial/parallel conversion, and then passing Discrete Fourier Transform (DFT) or Fast Fu A Fourier Transform (FFT) maps each subcarrier to a data stream separately for parallel/serial conversion. OFDM technology greatly reduces or even eliminates inter-symbol interference and ensures orthogonality between channels, thereby greatly reducing inter-channel interference.

In addition, in order to effectively utilize mobile communication network resources, the third generation partner mobile communication global standardization organization (3GPP) proposed the multimedia broadcast/multicast service (MBMS) service of the mobile communication network, thereby providing one data from the mobile communication network. The source sends multi-point services to multiple users, realizes network resource sharing, and improves the utilization of network resources, especially the air interface resources. The MBMS proposed by MBS can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service multicast and broadcast. It is described in detail in R6 version using Wideband Code Division Multiple Access (WCDMA). How to pass MBMS point-to-multipoint control channel (MCCH), MBMS point-to-multipoint Scheduling Channel (MBS) and MBMS point-to-multipoint transmission channel (MBMS point-to-multipoint Traffic Channel, MTCH) cooperates with each other to complete the transmission of MBMS data services. For details, see 3GPP TS 25.346 related protocol standards.

The current 3G system adopts a code division multiple access (CDMA) system, and adjacent cells can have different MBMS services without air interface merging. When OFDM technology is used in a 3G network, a 3G Long Term Evolution (LTE) network, or other mobile communication networks, due to the characteristics of the OFDM technology itself, multiple MBMS services are transmitted in adjacent cells, and air interface merge is performed at the cell edge. There will be problems with interference. In order to solve this problem, it is necessary to use the same resource to transmit the same service in a neighboring cell. LTE MBMS proposes to add a functional entity Co-ordinating Function in the network, but how to deal with a network device such as a base station The Co-ordinating Function cooperates to adjust the neighboring cell MBMS service resources so that the neighboring cells use the same resource to transmit the same service, so as to solve the problem of cell edge air interface merging interference, and no specific solution has been given. Summary of the invention

In view of this, the embodiment of the present invention provides a method for coordinating neighboring cell multimedia broadcast/multicast service resources, so that the same resource is used to transmit the same service in a neighboring cell, so as to solve the air interface at the edge of the adjacent cell. Interference problems that exist when merging. Another object of embodiments of the present invention is to provide a system that can be used to coordinate multimedia broadcast/multicast service resources of neighboring cells.

In order to achieve the above object, an embodiment of the present invention provides a method for coordinating MBMS service resources of a neighboring cell, where the method includes: sending an MBMS service resource request message to a first gateway to which the base station covering the first 'j, the area belongs Receiving, by the first Co-ordinating Function, a response message that includes a resource coordination result, where the resource coordination result is obtained by the first Co-ordinating Function according to a resource status of the first cell and the neighboring second cell; Adjust the MBMS service resources of the first cell.

The embodiment of the present invention further provides a system that can be used to coordinate MBMS service resources of a neighboring cell, where the system includes a first base station that covers the first cell, a first gateway to which the first cell belongs, and a first gateway corresponding to the first gateway. a second Co-ordinating Function corresponding to the second cell of the second cell adjacent to the first zone, the second gateway to which the second cell belongs, and a second Co-ordinating Function corresponding to the second gateway, where

The first base station is configured to send an MBMS service resource request message to the first Co-ordinating Function, and adjust an MBMS service resource of the first cell according to the response message from the first Co-ordinating Function;

The first Co-ordinating Function is configured to return the resource coordination result obtained according to the resource status of the first cell and the second cell to the first base station by using a response message.

As can be seen from the foregoing solution, the embodiment of the present invention adjusts the MBMS service resources of the neighboring cell by using the information exchange between the base station that covers the neighboring cell and the associated Co-ordinating Function, so that the neighboring cell is in the neighboring cell. Use the same resource to transfer the same The MBMS service solves the interference problem in the case of air interface merging at the edge of a neighboring cell in the case of multiple MBMS services transmitted in a neighboring cell. Moreover, the present invention provides a variety of information interaction methods, which are very flexible to implement. BRIEF DESCRIPTION OF THE DRAWINGS

1 is a system block diagram of an OFDM system in the prior art;

2 is a schematic flow chart of a first embodiment of the present invention;

3 is a schematic flow chart of a second embodiment of the present invention;

4 is a schematic flow chart of a third embodiment of the present invention;

FIG. 5 is a schematic flowchart of a fourth embodiment of the present invention; FIG.

6 is a schematic flow chart of a fifth embodiment of the present invention;

7 is a schematic flow chart of a sixth embodiment of the present invention;

FIG. 8 is a schematic flow chart of a seventh embodiment of the present invention. Mode for carrying out the invention

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail below.

First, a system that can be used to coordinate MBMS service resources of neighboring cells in the embodiment of the present invention is described. In the system, the cell 1 and the cell 2 are adjacent to each other, and the system includes a first base station that covers the cell 1, a first gateway to which the cell 1 belongs, a first Co-ordinating Function corresponding to the first gateway, and a second base station that covers the cell 2. The second gateway to which the cell 2 belongs and the second Co-ordinating Function corresponding to the second gateway.

The first base station may send an MBMS service resource request message to the first Co-ordinating Function through the first gateway, or may directly send an MBMS service resource request message to the first Co-ordinating Function, where the first Co-ordinating Function is based on the cell. The resource coordination result obtained by the resource status of the cell 2 and the cell 2 is returned to the first base station through the response message, and the first base station adjusts the MBMS service resource of the cell 1 according to the response message from the first Co-ordinating Function. The resource status of the cell 1 and the cell 2 in the embodiment of the present invention may include the MBMS service in the cell 1 and the cell 2 and the resources occupied by the cell.

The first gateway and the second gateway may be the same gateway, and the first Co-ordinating Function and the second Co-ordinating Function are the same Co-ordinating Function _0. If the first base station and the second base station are the same base station, A gateway and a second gateway are the same gateway, and the first Co-ordinating Function and the second Co-ordinating Function are the same Co-ordinating Function. At this time, the first Co-ordinating Function may be further used to return the resource coordination result to the second base station by using a response message, and the second base station is configured to adjust the MBMS service resource of the cell 2 by using the response message.

In addition, the first gateway and the second gateway may be different gateways, and the first Co-ordinating Function and the second Co-ordinating Function are different Co-ordinating Functions, and the first base station and the second base station are different base stations. At this time, the first Co-ordinating Function may be further used to send a synchronization message carrying the resource coordination result to the second Co-ordinating Function. Further, the second Co-ordinating Function may be further configured to send an indication message for adjusting the cell 2 MBMS service resource to the second base station, and the second base station is configured to adjust the MBMS service resource of the cell 2 according to the indication message. In addition, the second Co-ordinating Function may also be used to return the adjusted resource coordination result to the first Co-ordinating Function, and the first Co-ordinating Function returns the adjusted resource coordination result to the first base station by using the response message.

In the above structure, the first Co-ordinating Function and the second Co-ordinating Function are in a parallel relationship. Further, in the system that can be used to coordinate the MBMS service resources of the neighboring cell in the embodiment of the present invention, the third Co-ordinating may be further included. Function, the third Co-ordinating Function may be composed of a single Co-ordinating Function, or may be composed of multiple Co-ordinating Functions. In the system of this configuration, after receiving the MBMS service resource request message of the corresponding base station, the first Co-ordinating Function and/or the second Co-ordinating Function sends an MBMS resource coordination request to the third Co-ordinating Function, by The third Co-ordinating Function sends the resource coordination result to the first Co-ordinating Function and/or the second Co-ordinating Function, and then is returned to the first Co-ordinating Function and/or the second Co-ordinating Function through the response message. Corresponding base station. With this multiple Co-ordinating Function with hierarchical relationship, complex interactions between parallel Co-ordinating Functions can be avoided. The third Co-ordinating Function may be located at its corresponding gateway, the base station, or located at the first gateway, the base station covering the first cell, the second gateway, the base station covering the second cell, or an independent device.

It should be noted that the above system may be located in a 3G network or a 3G LTE network, or may be located in other mobile communication networks. The following embodiments illustrate the implementation of the present invention by taking an application in a 3G LTE network as an example.

In the embodiment of the present invention, each gateway (GateWay) corresponds to one or more Co-ordinating Functions, and the Co-ordinating Function may be located on a corresponding gateway or a base station, or may be an independently existing device. In the embodiment of the present invention, the message interaction between the base station and the Co-ordinating Function may be implemented by the gateway to which the base station belongs, that is, the base station sends a message to the Co-ordinating Function through the gateway, and the Co-ordinating Function sends the message through the gateway. The base station may also directly perform message interaction without passing through the gateway to which the base station belongs.

In the embodiment of the present invention, the MBMS service resource request message may be a request message for applying for a new MBMS service resource of the cell 1. In this case, the MBMS service resources of the neighboring cell 1 and the cell 2 may be coordinated as follows: 1) When there is an MBMS service that is the same as the new MBMS service in the cell 2, the same MBMS resource in the cell 2 as the new MBMS service is allocated for the new MBMS service; when the new MBMS service does not exist in the cell 2 When the same MBMS service is used, the new MBMS is allocated resources that are different from the existing MBMS services in the cell 1 and the cell 2;

2) allocating the same resources to other MBMS services already existing in the cell 2 for the new MBMS service, and instructing the base station to adjust the transmit power in the cell 1, so that the power of the new MBMS service at the cell edge is less than the power capable of generating interference;

3) releasing the resources of the MBMS service in the cell 1 and allocating and restoring the resources of the MBMS service in the cell 1 and the cell 2 after the release of the new MBMS service;

4) If the base station covering the cell 1 and the base station covering the cell 2 are the same base station and the base station is also the request message of the new MBMS service resource of the cell 2, the same new MBMS service in the cell 1 and the cell 2 is allocated the same. Resources, and/or allocate different resources for different new MBMS services in Cell 1 and Cell 2.

The MBMS service resource request message may also be a request message for releasing the MBMS service resource in the cell 1, and the resource coordination result is to release the MBMS service resource.

The MBMS service resource request message may also be a request message for temporarily suspending the MBMS service in the cell 1, and the resource coordination result is to reserve or release the MBMS service resource.

If the cell 1 and the cell 2 belong to the same gateway, the above result is achieved by the base station and the Co-ordinating Function interaction. If the cell 1 and the cell 2 belong to different gateways, the above result is further achieved by using a synchronization message between Co-ordinating Functions corresponding to different gateways. The first embodiment is: when the two adjacent cells apply for a new MBMS service resource, and the new MBMS service of the two cells has the same MBMS service and different MBMS services, the two adjacent cell MBMS service resources are coordinated according to the present invention. example. The cell 1 and the cell 2 are adjacent to each other and belong to the same gateway. In this embodiment, the two cells are covered by the same base station. In cell 1, {1, 2, 3, 4} 4 MBMS services are to be added, and in cell 2, {1, 2, 5, 6} 4 MBMS services need to be added. Referring to FIG. 2, the flow of the first embodiment includes the following steps:

Step 101: The cell 1 and the cell 2 belong to the same base station, and the base station sends a request message for requesting the resource of the new MBMS service of the cell 1 and the cell 2 to the Co-ordinating Function through the gateway, where the MBMS service resource request message includes at least the cell 1 The identity of the new MBMS service and the identity of the new MBMS service for Cell 2.

Step 102: Co-ordinating Function ^ The new MBMS service of cell 1 and cell 2 obtains resource coordination result, that is, the same MBMS service { 1 , 2} in the two cells occupy the same resource, and different MBMS services in the two cells {3, 4, 5, 6} should not occupy the same resources, and the coordination result is sent to the base stations covering cell 1 and cell 2 through the response message. The resources herein may include frequency band resources, super frames, and sub-frame resources for transmitting MBMS services.

Step 103: The base station allocates resources according to a response message from the Co-ordinating Function.

In addition, if the cell 1 and the cell 2 are covered by different base stations, and the different base stations send a request message for requesting the resources of the cell 1 and the cell 2 new MBMS service to the Co-ordinating Function, the flow is similar to this embodiment, and different The base stations that transmit and receive messages are base stations that respectively correspond to two cells. Second Embodiment: Mainly describes an example in which a cell temporarily suspends an MBMS service, and the present invention coordinates an MBMS service resource of two adjacent cells.

Cell 1 and cell 2 are adjacent to each other and belong to the same gateway. Both the cell 1 and the cell 2 are transmitting the MBMS service { 1 , 2, 3, 4}, and the MBMS service { 1 } in the cell 2 is temporarily unused. The user terminal (UE) performs reception, and in order to save air interface resources, it is necessary to temporarily stop transmitting the MBMS service { 1 } in the cell 2. Referring to FIG. 3, the process of the second embodiment includes the following steps: Step 201: The base station of the coverage cell 2 sends a request message for temporarily suspending the MBMS service {1} to the Co-ordinating Function through the gateway, where the MBMS service resource request message includes at least The identifier of the temporarily suspended MBMS service.

Step 202: After receiving the service resource request message, the Co-ordinating Function returns a resource coordination result to the base station of the coverage cell 2 to reserve or release the resource response step 203, and the base station of the coverage cell 2 responds according to the response message. These resources are reserved in the cell 2 for the MBMS service { 1 } or the resources in the cell 2 for transmitting the MBMS service { 1 } are released.

Further, in step 202, the Co-ordinating Function also sends an indication message to the base station of the coverage cell 1, instructing it to adjust the resources occupied by the MBMS service in the cell 1, for example, adjusting the resources occupied by the MBMS service {1} in the cell 1 to Different resources, so that they will not be interfered by other MBMS services at the edge of the cell. The base station covering the cell 1 adjusts the MBMS resources in the cell 1 according to the indication message. Third Embodiment: An example of coordinating MBMS service resources of two adjacent cells according to the present invention when a new MBMS service is added to a cell is mainly described.

Cell 1 and cell 2 are adjacent to each other and belong to the same gateway. Both the cell 1 and the cell 2 are transmitting the MBMS service { 1 , 2, 3, 4}, and at this time, the new MBMS service {7} is added in the cell 1. Referring to FIG. 4, the flow of the third embodiment includes the following steps:

Step 301: The base station that covers the cell 1 sends a request message for applying for a new MBMS service resource to the Co-ordinating Function, and the MBMS service resource request message includes at least the identifier of the new MBMS service. Step 302: Co-ordinating Function 2, whether there is the same MBMS service as the new MBMS of the cell 1 in the cell 2, and the resource coordination result is obtained, that is, if there is the same MBMS service in the cell 2, it is new in the cell 1. The MBMS service allocates the same resources as the MBMS service in the cell 2, and if not, allocates resources different from the resources used by the cell 1 and the cell 2. In this embodiment, the cell 2 has {1, 2, 3, 4} four MBMS services, and if there is no MBMS service {7} requested by the cell 2, the new resource is allocated for the MBMS service {7} of the cell 1. This resource is different from the resources of the existing MBMS service { 1 , 2, 3, 4}. The Co-ordinating Function returns a response message carrying the resource coordination result to the base station covering the cell 1.

Step 303: The base station covering the cell 1 allocates resources different from the other four MBMS services to the MBMS service {7} according to the response message. The resources herein may include frequency band resources, super frames, and subframe resources for transmitting MBMS services. The fourth embodiment mainly describes an example of coordinating MBMS service resources of two adjacent cells according to the present invention when a higher priority MBMS service is added to a cell.

Cell 1 and cell 2 are adjacent to each other and belong to the same gateway. Both cell 1 and cell 2 are transmitting MBMS services { 1 , 2, 3, 4}. At this time, cell 1 suddenly needs to transmit a higher priority MBMS service. Or a single wave (unicast) business. Referring to Figure 5, the flow of the fourth embodiment includes the following steps:

Step 401: The base station of the coverage cell 1 sends a request message for requesting a resource of the new MBMS service to the Co-ordinating Function through the gateway, where the MBMS service resource request message includes at least the identifier of the new MBMS service.

Step 402: The Co-ordinating Function obtains a resource coordination result according to whether the current remaining resources are sufficient to transmit the MBMS service with a high priority, and returns the information to the base station of the coverage cell 1 by using the response message. That is: if the current remaining resources are sufficient to transmit MBMS with high priority The service, in the response message, indicates that the base station that covers the cell 1 allocates new resources to the MBMS service with a higher priority; if the current remaining resources are insufficient to transmit the resource with a high priority, the Co-ordinating Function follows a preset priority algorithm. It is determined that the original MBMS service is released first, and the part of the resource is allocated to the MBMS service with higher priority, and the base station covering the cell 1 is instructed to release the determined MBMS service and allocate resources for the new MBMS.

Step 403: The base station covering the cell 1 allocates resources to the MBMS service {7} according to the response message. The resources herein may include frequency band resources, superframes, and subframe resources for transmitting MBMS services. Fifth Embodiment: When an MBMS service is added to one of two adjacent cells belonging to different gateways, an example of coordinating MBMS service resources of two adjacent cells according to the present invention is mainly described.

The cell 1 and the cell 2 are adjacent to each other and belong to different gateways. It may be assumed that the cell 1 belongs to the first gateway, the first gateway corresponds to the first Co-ordinating Function, the cell 2 belongs to the second gateway, and the second gateway corresponds to the second Co. -ordinating Function. Cell 1 transmits {1, 2, 3, 4} 4 MBMS services, and Cell 2 transmits {1, 2, 3, 4, 5} 5 MBMS services, at which time Cell 1 adds a new MBMS service {5 } . Referring to Figure 6, the flow of the fifth embodiment includes the following steps:

Step 501: The base station of the coverage cell 1 sends, by using the first gateway, a request message for requesting a resource of a new MBMS service to the first Co-ordinating Function, where the service resource request message includes at least an identifier of the new MBMS service.

Step 502: The first Co-ordinating Function sends a response message to the base station of the coverage cell 1 by using the first gateway, and in the response message, instructing to allocate a new resource different from the used resource for the MBMS service {5}, and to the second The Co-ordinating Function sends a synchronization message, where the synchronization message carries the resource coordination result, including at least the identifier of the cell 1, the new MBMS industry. The identity of the service and the new MBMS service {5 } need to occupy MBMS resources.

Step 503: The base station covering the cell 1 allocates a new resource for the MBMS service {5} according to the response message.

Step 504, on the other hand, the second Co-ordinating Function sends an indication message to the base station of the coverage cell 2 through the second gateway according to the resource occupied by the MBMS service {5} in the synchronization message, indicating the MBMS service in the cell 2. The resource of the 5 } resource is scheduled, for example, it is adjusted to the same resource as the MBMS service {5 } in the cell 1 to ensure that the MBMS service does not interfere with the air interface merging process of other MBMS services at the cell edge.

Step 505: The base station covering the cell 2 performs resource scheduling according to the indication message. In this embodiment, if there is a third Co-ordinating Function in the system. In step 501, after receiving the request message for requesting the resource of the new MBMS service sent by the base station of the cell 1, the first Co-ordinating Function sends an MBMS resource coordination request to the third Co-ordinating Function, and then the third Co-ordinating Function. The ordinating function sends the resource coordination result to the first Co-ordinating Function and the second Co-ordinating Function. In the following step 504, the synchronization message carrying the resource coordination result is sent to the second Co-ordinating Function without the first Co-ordinating Function. Sixth Embodiment: When an MBMS service is added to one of two adjacent cells belonging to different gateways, another example of coordinating MBMS service resources of two adjacent cells according to the present invention is described.

The cell 1 and the cell 2 are adjacent to each other and belong to different gateways. It may be assumed that the cell 1 belongs to the first gateway, the first gateway corresponds to the first Co-ordinating Function, the cell 2 belongs to the second gateway, and the second gateway corresponds to the second Co. -ordinating Function. Cell 1 transmits {1, 2, 3, 4} 4 MBMS services, and Cell 2 transmits {1, 2, 3, 4, 5} 5 MBMS services, at which time Cell 1 adds a new MBMS service {5 } . Referring to Figure 7, the flow of the sixth embodiment The process includes the following steps:

Step 601: The base station of the coverage cell 1 sends, by using the first gateway, a request message for requesting a resource of a new MBMS service to the first Co-ordinating Function, where the service resource request message includes at least an identifier of the new MBMS service.

Step 602: After receiving the resource request message of the base station that covers the cell 1, the first Co-ordinating Function sends a synchronization message to the second Co-ordinating Function, where the synchronization message carries the resource coordination result, and at least includes the identifier of the cell 1, and the new The identity of the MBMS service and the new MBMS service {5} need to occupy the MBMS resources.

Step 603, the second Co-ordinating Function, according to the resource that the cell 2 already has the MBMS service {5}, the MBMS resource occupied by the MBMS service {5} in the cell 1 is the same as the resource occupied by the MBMS service {5} in the cell 2. And returning the modified resource coordination result to the first Co-ordinating Function through the response message. If the MBMS service {5 } is not transmitted in the cell 2, the second Co-ordinating Function returns a response message that does not change or does not return a response message.

Step 604: After receiving the response message of the second Co-ordinating Function, the first Co-ordinating Function sends the modified resource coordination result or the original coordination result to the base station of the coverage cell 1 by using the response message.

Step 605: The base station covering the cell 1 allocates resources to the MBMS service {5} according to the response message. The resources herein may include frequency band resources, superframes, and subframe resources for transmitting MBMS services.

In this embodiment, if there is a third Co-ordinating Function in the system. Step 602 to step 604 are changed to: after receiving the request message for requesting the resource of the new MBMS service sent by the base station of the cell 1, the first Co-ordinating Function sends an MBMS resource coordination request to the third Co-ordinating Function, and then Three Co-ordinating Function sends the resource coordination result to the first Co-ordinating The function and the second Co-ordinating Function, after receiving the resource coordination result from the third Co-ordinating Function, the first Co-ordinating Function sends the resource coordination result to the base station of the coverage cell 1 by using the response message. The resource coordination result refers to an MBMS resource that is different from the used resources in the cell 1 and the cell 2. In this way, the complex interaction between the first Co-ordinating Function and the second Co-ordinating Function can be avoided, and the resource coordination result obtained according to the resource status of the cell 1 and the cell 2 is directly sent by the third Co-ordinating Function to the first A Co-ordinating Function. Seventh Embodiment: An example in which one of two adjacent cells belonging to different gateways stops transmitting an MBMS service, and the adjacent two cell MBMS service resources are coordinated according to the present invention.

The cell 1 and the cell 2 are adjacent to each other and belong to different gateways. It may be assumed that the cell 1 belongs to the first gateway, the first gateway corresponds to the first Co-ordinating Function, the cell 2 belongs to the second gateway, and the second gateway corresponds to the second Co. -ordinating Function. Cell 1 transmits { 1 , 2, 3, 4} 4 MBMS services, and cell 2 transmits { 1 , 2, 3 , 4} 4 MBMS services. At this time, cell 1 stops transmitting MBMS service {3 }. Referring to FIG. 8, the seventh embodiment includes the following steps: Step 701: The base station of the coverage cell 1 sends a request message for releasing the resource of the MBMS service {3} to the first Co-ordinating Function by using the first gateway, where the service resource request message is sent. At least the identity of the MBMS service to be released is included.

Step 702: After receiving the resource release message of the base station that covers the cell 1, the first Co-ordinating Function sends a synchronization message to the second Co-ordinating Function, where the synchronization message carries the resource coordination result, including at least the identifier of the cell 1, the MBMS. The service identity and the MBMS service {3} need to release the MBMS resources.

Step 703: The second Co-ordinating Function may allocate resources occupied by the MBMS service {3} to other MBMS services, or may keep the original resources unchanged. Take the original resource as an example. The second Co-ordinating Function sends a response message to the first Co-ordinating Fimctiori.

Step 704: The first Co-ordinating Function returns a response message to the base station of the coverage cell 1 according to the response message from the second Co-ordinating Function.

Step 705: The base station releases the resource according to the response message. The resources herein may include frequency band resources, super frames, and subframe resources for transmitting MBMS services.

In this embodiment, if there is a third Co-ordinating Function in the system. In step 702 to step 704, the first Co-ordinating Function sends an MBMS resource coordination request to the third Co-ordinating Function, and then the third Co-ordinating Function, after receiving the resource release message sent by the base station covering the cell 1. Transmitting the resource coordination result to the first Co-ordinating Function and the second Co-ordinating Function _0, the resource coordination result is to release the resource of the MBMS service {3 } in the cell 1, and retain the original of the MBMS service {3 } in the cell 2. Have resources, or assign them to other MBMS services. This avoids complex interactions between the first Co-ordinating Function and the second Co-ordinating Function. The eighth embodiment is: When a new MBMS service is added to one of two adjacent cells belonging to different gateways, and the new MBMS service uses the existing MBMS service resources of the neighboring cell, the adjacent two cell MBMS service resources are coordinated according to the present invention. example of.

The cell 1 and the cell 2 are adjacent to each other and belong to the same gateway. The cell 1 transmits the MBMS service { 1 , 2, 3 , 4}, and the cell 2 transmits the MBMS service { 1 , 2, 3 , 4}. Since the UE does not receive the MBMS service { 1 } temporarily in the cell 1, the resources occupied by the MBMS service { 1 } in the cell can be released, and at this time, the UE requests to transmit another MBMS service {7 }, then the MBMS service { 7} The soft frequency multiplexing technology can be used, and the base station transmits the power information of the MBMS service {7} to the Co-ordinating Function, Co-ordinating Function The power of the MBMS service {7} will be obtained according to a predetermined algorithm to ensure that the power of the MBMS service transmitted by the neighboring cell is not excessively large, so that the MBMS service {7} and the MBMS service {1} at the cell edge do not interfere with each other. That is to say, the resource coordination result of the embodiment is: allocating the same resource to the other MBMS service existing in the cell 2 for the new MBMS service, and making the power of the new MBMS service at the cell edge smaller than the power capable of generating interference. . The Co-ordinating Function returns the resource coordination result to the base station through the response message, and the base station adjusts the resource of the MBMS service {7} according to the response message. Ninth Embodiment: An example of coordinating adjacent two-cell MBMS service resources according to the present invention is described mainly when an MBMS service further includes a program band.

If the specific MBMS service further includes a program band, the Co-ordinating Function can also be used to coordinate the transmission of such a specific MBMS service in the cell, such as a mobile TV service. When the Mobile TV transmits in the cell by using the multi-cell transmission mode, each program multiplexes the resources of each cell, then the Co-ordinating Function is guaranteed to be transmitted on the edge of the adjacent cell. The resources occupied by the same program are synchronized. Obviously, the coordination of the MBMS service resources needs to include the coordination of the resources occupied by the program band, and the coordination of the resources occupied by the program band is the same as the coordination of the MBMS service resources in the previous embodiment, and the specific implementation process and the other The embodiment is similar, that is, the same program band in the MBMS service to which the same resource is allocated is allocated the same resource, and details are not described herein again. The tenth embodiment mainly describes an example of coordinating MBMS service resources of two adjacent cells according to the present invention when the bandwidth of two adjacent cells is inconsistent but the MBMS service occupies the same bandwidth resource.

If the bandwidth of the two adjacent cells is inconsistent, for example, the bandwidth of the cell 1 is wider than the bandwidth of the cell 2, then the MBMS service needs to occupy the same bandwidth resource, The Co-ordinating Function ensures that the same MBMS service in the two cells occupies the same resource. The specific implementation process is the same as that in the previous embodiment, and is not mentioned here. In various embodiments of the present invention, adjacent cells 1 and 2 may belong to the same service area. The so-called same service area refers to an area that uses the same time-frequency transmission of service content on the same geographical coverage.

In addition, cell 1 and cell 2 are preferably the largest synchronization area. The synchronization area refers to an area in which all base stations can synchronize and perform multicast single frequency network (MBSFN) transmission. The sync area can support one or more MBSFN areas. Also, at a given frequency level, the base station can only belong to one synchronization area.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Claim

A method for coordinating a multimedia broadcast/multicast MBMS service resource of a neighboring cell, the method comprising:

Sending an MBMS service resource request message to the first coordinated cooperation entity corresponding to the first gateway to which the base station of the first cell belongs; Co-ordinating Function;

Receiving a response message including a resource coordination result, where the resource coordination result is obtained by the first Co-ordinating Function according to the resource status of the first cell and the neighboring second cell; and adjusting the MBMS service of the first cell according to the response message Resources.

The method according to claim 1, wherein the second cell belongs to a first gateway.

The method according to claim 2, wherein the MBMS service resource request message is a request message for applying for a new MBMS service resource of the first cell;

The resource coordination result is: when there is an MBMS service in the second cell that is the same as the new MBMS service, the new MBMS service is allocated the same resource as the MBMS service in the second cell; When there is the same MBMS service as the new MBMS service, the new MBMS is allocated a resource different from the existing MBMS service in the first 'j, the zone, and the second cell; or

The resource coordination result is: allocating the same MBMS service with the same resources as the other MBMS services already existing in the second cell, and making the power of the new MBMS service at the cell edge smaller than the power capable of generating interference; or

The resource coordination result is: releasing the resources of the MBMS service in the first cell, and allocating and releasing the resources of the MBMS service in the first cell and the second cell after the release of the new MBMS service.

4. The method according to claim 2, wherein the MBMS service resource The source request message is a request message for applying for a new MBMS service resource of the first cell;

The method further includes: sending a request message for applying a new MBMS service resource of the second cell to the first Co-ordinating Function; receiving a response message including the resource coordination result, and adjusting the MBMS service resource of the second cell according to the response message;

The resource coordination result is: allocating the same resource for the same new MBMS service in the first cell and the second cell, and/or allocating different resources for different new MBMS services in the first cell and the second cell.

The method according to claim 2, wherein the MBMS service resource request message is a request message for releasing a first cell MBMS service resource; and the resource coordination result is to release the MBMS service resource in a first cell. ; or

The MBMS service resource request message is a request message for temporarily suspending the first cell MBMS service; the resource coordination result is to reserve or release the MBMS service resource in the first cell.

The method according to claim 5, wherein the method further comprises: receiving an indication message for adjusting an MBMS service resource in the second cell; and adjusting an MBMS service resource of the second cell according to the indication message.

The method according to claim 1, wherein the second cell belongs to a second gateway, and the second gateway corresponds to a second Co-ordinating Function.

The method according to claim 7, wherein the MBMS service resource request message is a request message for applying for a new MBMS service resource of the first cell;

The resource coordination result is: releasing the resources of the existing MBMS service in the first cell, and allocating and releasing the existing MBMS services in the first cell after the new MBMS service is released; or assigning the new MBMS service Different from the existing MBMS service in the first cell;

The method further includes: transmitting a synchronization message to the second Co-ordinating Function, The synchronization message carries the resource coordination result described above.

The method further includes: after receiving the MBMS service resource request message sent by the base station covering the first 'J, the first Co-ordinating Function, sending the MBMS resource coordination request to the third Co-ordinating Function; receiving the third Co The resource coordination result sent to the first Co-ordinating Function and the second Co-ordinating Function by the -ordinating Function.

10. A method according to claim 8 or 9, characterized in that

The method further includes: receiving an indication message, where the indication message indicates that the resource occupied by the same MBMS service in the second cell is the same as the resource of the new MBMS service; MBMS service resources of the two cells.

The resource coordination result is: releasing the resources of the existing MBMS service in the first cell, and allocating and releasing the existing MBMS service in the first cell after the new MBMS service is released; or, for the new MBMS service Allocating resources that are different from the existing MBMS services in the first cell;

The method further includes: sending a synchronization message to the second Co-ordinating Function, the synchronization message carrying the resource coordination result; receiving the response of the resource coordination result after the change is carried In response to the message, the change means that the second Co-ordinating Function changes the resource allocated for the new MBMS service in the resource coordination result to the resource occupied by the same MBMS service in the second cell as the new MBMS service. Transmitting the changed resource coordination result to the base station covering the first cell through the response message.

The method further includes: sending a synchronization message to the second Co-ordinating Function, the synchronization message carrying the resource coordination result; receiving a response message carrying the changed resource coordination result, where the change refers to the second Co-ordinating Function discovery The resource allocated for the new MBMS service is the same as the other MBMS services already in the second cell, and the resource coordination result is changed, indicating that the base station covering the first cell adjusts the transmit power in the cell, so that the new MBMS service is at the cell edge. The power is less than the power capable of generating interference; the modified resource coordination result is returned to the base station covering the first cell through the response message.

The resource coordination result is: releasing the resource of the existing MBMS service in the first cell, and allocating the resource occupied by the MBMS service in the second cell that is the same as the new MBMS service for the new MBMS service; or, for the new The MBMS service allocates resources occupied by the same MBMS service in the second cell as the new MBMS service; or, the resources of the existing MBMS service in the first cell are released, and other MBMS services in the second cell are allocated for the new MBMS service. The occupied resource indicates that the base station covering the first cell adjusts the transmission in the cell The power is transmitted so that the power of the new MBMS service at the cell edge is smaller than the power that can generate interference; or the resource occupied by other MBMS services in the second cell is allocated for the new MBMS service, and the base station covering the first cell is adjusted to The transmit power of the cell is such that the power of the new MBMS service at the cell edge is less than the power capable of generating interference;

The method further includes: after receiving the MBMS service resource request message sent by the base station that covers the first cell, sending an MBMS resource coordination request to the third Co-ordinating Function; receiving the third Co-ordinating Function and sending the message to the first Co- The resource coordination result of the ordinating function and the second Co-ordinating Function.

The method of claim 7, wherein the MBMS service resource request message is a request message for releasing the first cell MBMS service resource; the resource coordination result is to release the MBMS service resource; or

The MBMS service resource request message is a request message for temporarily suspending the first cell MBMS service; the resource coordination result is to reserve or release the MBMS service resource; the method further includes: sending a synchronization message to the second Co-ordinating Function, The synchronization message carries the resource coordination result described above.

The method of claim 7, wherein the MBMS service resource request message is a request message for releasing a first cell MBMS service resource; and the resource coordination result is a release of the MBMS service resource; or

The MBMS service resource request message is a request message for temporarily suspending the MBMS service of the first cell; the resource coordination result is to reserve or release the MBMS service resource; the method further includes: sending, by the base station receiving the coverage of the first cell After the MBMS service resource request message, the MBMS resource coordination request is sent to the third Co-ordinating Function; and the resource coordination result sent by the third Co-ordinating Function to the first Co-ordinating Function and the second Co-ordinating Function is received.

16. Method according to claim 14 or 15, characterized in that the method further The step includes: receiving an indication message for adjusting the MBMS service resource; and adjusting the MBMS service resource of the second cell according to the indication message.

The method according to any one of claims 8, 11, 12, and 14, wherein the synchronization message includes at least an MBMS service identifier and a cell identifier.

The method according to claim 1, wherein the MBMS service further comprises a program band, and the resource coordination result further comprises: allocating the same resource for the same program band in the same MBMS service to which the same resource is allocated. .

The method according to claim 1, wherein the bandwidths of the first cell and the second cell are inconsistent, and the MBMS services of the first cell and the second cell occupy the same bandwidth resource.

The method according to claim 1, wherein the MBMS service resource comprises a frequency band resource, a super frame and a subframe resource for transmitting an MBMS service.

The method according to claim 1, wherein the MBMS resource request message is sent by a gateway to which the base station belongs; and/or, the response message is received by a gateway to which the base station belongs.

A system for coordinating a multimedia broadcast/multicast service resource of a neighboring cell, wherein the system includes a first base station that covers the first cell, a first gateway to which the first cell belongs, and a first gateway a first Co-ordinating Function, a second base station of the second cell adjacent to the first area, a second gateway to which the second cell belongs, and a second Co-ordinating Function corresponding to the second gateway, where

The system according to claim 22, wherein the first gateway and the second gateway are the same gateway, and the first Co-ordinating Function and the second Co-ordinating Function are the same Co-ordinating Function _0.

The system according to claim 22, wherein the first base station and the second base station are the same base station, and the first gateway and the second gateway are the same gateway, the first Co-ordinating Function and The second Co-ordinating Function is the same Co-ordinating Function.

25. A system according to claim 23 or 24, wherein

The first Co-ordinating Function further includes means for returning the resource coordination result to the second base station by using a response message;

The second base station is configured to adjust an MBMS service resource of the second cell according to the response message.

The system according to claim 22, wherein the first gateway and the second gateway are different gateways, and the first Co-ordinating Function and the second Co-ordinating Function are different Co-ordinating Functions.

The system according to claim 26, wherein the first Co-ordinating Function further comprises means for transmitting a synchronization message carrying a resource coordination result to the second Co-ordinating Function.

The system according to claim 26, wherein the system further comprises a third Co-ordinating Function;

The first Co-ordinating Function further includes a module for sending an MBMS resource coordination request to the third Co-ordinating Function;

And the third Co-ordinating Function is configured to send the resource coordination result obtained according to the resource status of the first cell and the second cell to the first Co-ordinating Function and the second Co-ordinating Fimction.

29. A system according to claim 27 or 28, characterized in that The second Co-ordinating Function is configured to send, to the second base station, an indication message for adjusting a second cell MBMS service resource;

The second base station is configured to adjust the MBMS service resource of the second cell according to the indication message.

30. The system of claim 28, wherein:

The second Co-ordinating Function is used to return the adjusted resource coordination result to the first Co-ordinating Function.

The system according to claim 22, wherein the first Co-ordinating Function is located at the first gateway, located at a base station covering the first 'area, or a separate device; and/or

The second Co-ordinating Function is located at the second gateway, at a base station that covers the second cell, or is an independent device.

The system according to claim 28 or 30, wherein the first Co-ordinating Function is located at the first gateway, located at a base station covering the first 'area, or a separate device; and/or

The second Co-ordinating Function is located at the first gateway, at a base station covering the first ', zone, or as an independent device; and/or

The third Co-ordinating Function is located at the first gateway, at a base station covering the first ‘area, a second base station, a base station covering the second cell, or an independent device.

33. The system according to claim 22, wherein: the first cell and/or the second cell belong to the same service area; and/or,

The first cell and/or the second cell belong to a largest synchronization area.

The method according to claim 22, wherein the first base station sends the MBMS resource request message to the first Co-ordinating Function by using the first gateway; and/or, the first Co-ordinating Function passes the first The gateway sends the response message to the first base station; and/or the second base station sends the second Co-ordinating Function to the second Co-ordinating Function through the second gateway The MBMS resource request message; and/or the second Co-ordinating Function sends the response message to the second base station by using the second gateway.