CN101242636B

CN101242636B - Method and system for configuring single-frequency network area

Info

Publication number: CN101242636B
Application number: CN2007100075648A
Authority: CN
Inventors: 蔺波; 吕博雅; 邱勇; 薛希俊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-02-06
Filing date: 2007-02-06
Publication date: 2011-02-09
Anticipated expiration: 2027-02-06
Also published as: CN101242636A; WO2008098498A1

Abstract

The invention discloses a configuration method for single frequency network area, which is used to realize dynamic and semi-static configuration of single frequency network area. The method is: multicast coordinate entity MCE receives message sent by multimedia broadcast and multicast service MBMS wireless resource application entity; the mentioned MCE determines whether to expand single frequency network area based on the message, and ensure MBMS wireless resource application entity that needs to be added into single frequency network area; and sends wireless resource assigning information to MBMS wireless resource application entity that needs to be added into single frequency network area. The invention also discloses a communication system, MCE, MBMS wireless resource application entity and user device.

Description

The method and system of configuring single-frequency network area

Technical field

The present invention relates to the communications field, particularly the method and system of configuring single-frequency network area.

Background technology

Along with the development of radio network technique, (Universal Mobile Telecommunication System UMTS) develops into Long Term Evolution (Long Term Evolution, LTE) system from universal mobile telecommunications system.LTE is the evolution standard based on the UMTS network that 3GPP organizes to set up.LTE has improved the transmittability of physical layer greatly, reduces the complexity of system.

Wherein, (Multimedia Broadcast/Multicast Service MBMS) also is greatly improved for multimedia broadcasting and multicast services technology.MBMS is introduced in the R6 of UMTS version first, utilizes the network of UMTS that MBMS is provided service.MBMS is meant, by sharing a transmission link multimedia data broadcast or be multicasted to portable terminal.MBMS is divided into broadcasting and two kinds of mode of operations of multicast.Wherein, broadcast mode is meant, with multi-medium data from a service source by unidirectional send to all inner subscriber equipmenies of broadcast service zone (User Equipment, UE).UE under this pattern need not registration can receive broadcast data, and this broadcast mode is save radio resources effectively, but can't guarantee the integrality of the data that UE receives.Multicast pattern and broadcast mode are very similar, but the UE that can receive multi-case data in the multicast pattern is only limited to registered UE that should business.When the UE that receives multi-case data in the sub-district is very few, can select further that point-to-point (Point To Point, radio bearer mode PTP) sends multi-case data, to reduce the interference to other Radio Link.

Under existing UMTS system, by core net (Core Network, CN) continuity of control UE MBMS business when sub-district gravity treatment or cell update.

When radio network technique develops into the LTE system, MBMS also be varied to enhanced multimedia broadcast and multicast services (Enhanced-MBMS, E-MBMS).Very big variation has taken place in the framework of E-MBMS on the basis of MBMS, one of them is to have introduced single frequency network (Single frequency network, SFN) notion, it requires some continuous evolution base station (EvolvedNode B, eNB) in the identical time, same wireless resource with same frequency band sends identical content.These continuous zones that eNB constituted are called as single-frequency network area (SFN area).

For the collocation method of SFN area, there is not clear and definite scheme at present.

Summary of the invention

The embodiment of the invention provides the method and system of configuration SFN area, is used to realize the dynamic or semi-static configuration of SFN area.

A kind of method of expanding single-frequency network area may further comprise the steps:

The message that multicast coordination entity (MCE) receiving multimedia broadcast/multicast services (MBMS) radio resource utilization entity sends; Wherein, the MBMS radio resource utilization entity that sends described message is the MBMS radio resource utilization entity that is in the single-frequency network area edge;

Described MCE is according to described message decision expansion single-frequency network area, and definite MBMS radio resource utilization entity that needs to add single-frequency network area; And

The MBMS radio resource utilization entity that adds single-frequency network area to needs sends information of radio resource allocation.

A kind of method of shrinking single-frequency network area may further comprise the steps:

Multicast coordination entity (MCE) receives the message of the MBMS radio resource utilization entity transmission that is in single-frequency network area inside;

Described MCE shrinks single-frequency network area according to described message decision, and determines to leave the MBMS radio resource utilization entity of single-frequency network area; And

The MBMS radio resource utilization entity that leaves single-frequency network area to needs sends the message that is used to remove allocation of radio resources.

A kind of method of configuring single-frequency network area may further comprise the steps:

Multicast coordination entity (MCE) is according to single-frequency network area configuration information decision expansion, and definite MBMS radio resource utilization entity that needs to add single-frequency network area; And

Described MCE sends information of radio resource allocation to the described MBMS radio resource utilization entity that needs to add single-frequency network area; And/or

Multicast coordination entity (MCE) is according to single-frequency network area configuration information decision contraction single-frequency network area, and definite MBMS radio resource utilization entity that need leave single-frequency network area; And

Described MCE sends the message that is used to remove allocation of radio resources to the MBMS radio resource utilization entity that needs leave single-frequency network area.

A kind of method of setting up single-frequency network area may further comprise the steps:

Multicast coordination entity (MCE) receives first message that comprises the user equipment (UE) quantity of having registered the MBMS business that MBMS radio resource utilization entity sends;

Described MCE finds to have registered the UE quantity of MBMS business greater than 0 o'clock, single-frequency network area is set up in decision, and determine to add single-frequency network area, and further determine the described part or all of adjacent MBMS radio resource utilization entity of the MBMS radio resource utilization entity of adding single-frequency network area that needs is added single-frequency network area greater than the pairing continuous N BMS radio resource utilization of 0 statistics entity; And

Described MCE sends information of radio resource allocation to the MBMS radio resource utilization entity that needs add single-frequency network area.

A kind of method that disposes outer peripheral areas may further comprise the steps:

The MBMS radio resource utilization entity of multicast coordination entity (MCE) in the outer peripheral areas of single-frequency network area sends the 4th message that is used for resource coordination;

Described MBMS radio resource utilization entity is according to the 4th message of receiving that is used for resource coordination, and the Radio Resource identical with described single-frequency network area used in restriction.

Multicast coordination entity (MCE) sends Indication message to the MBMS radio resource utilization entity that is in the single-frequency network area edge, and described Indication message comprises that needs add the sign of the MBMS radio resource utilization entity of outer peripheral areas;

The MBMS radio resource utilization entity at described edge makes corresponding M BMS radio resource utilization physical constraints use the Radio Resource identical with described single-frequency network area according to described Indication message and sign wherein.

A kind of subscriber equipment is known about the method for single-frequency network area position, be may further comprise the steps:

MBMS radio resource utilization entity knows that this entity is in the single-frequency network area edge, and sends rim condition information to subscriber equipment;

Subscriber equipment is known the MBMS radio resource utilization entity that belongs to the edge according to the rim condition information of receiving.

MBMS radio resource utilization entity obtains the single-frequency network area relevant information of adjacent MBMS radio resource utilization entity by MCE or adjacent MBMS radio resource utilization entity, and this single-frequency network area relevant information is sent to subscriber equipment;

Described subscriber equipment analyzes the MBMS radio resource utilization entity that belongs to the edge according to the single-frequency network area relevant information of receiving.

The message that multicast coordination entity MCE receiving multimedia broadcast and multicast services MBMS radio resource utilization entity send;

Described MCE is according to described message decision expansion single-frequency network area, and the part or all of sub-district in definite MBMS radio resource utilization entity coverage need add single-frequency network area; And

The sub-district pairing MBMS radio resource utilization entity that adds single-frequency network area to needs sends information of radio resource allocation.

Multicast coordination entity MCE receives the message of the sub-district pairing MBMS radio resource utilization entity transmission that is in the single-frequency network area;

Described MCE shrinks single-frequency network area according to described message decision, and single-frequency network area need be left in the part or all of sub-district in definite MBMS radio resource utilization entity coverage; And

The sub-district pairing MBMS radio resource utilization entity that leaves single-frequency network area to needs sends the message that is used to remove allocation of radio resources.

A kind of multicast coordination entity comprises:

Receiving element is used to receive the message that MBMS radio resource utilization entity sends;

The decision unit is used for setting up, expanding and/or the contraction single-frequency network area according to described message decision;

Determining unit is used for the decision made according to described decision unit, determines to need to add and/or leave the MBMS radio resource utilization entity of single-frequency network area;

Transmitting element be used for sending information of radio resource allocation to the MBMS radio resource utilization entity of needs adding single-frequency network area, and/or the MBMS radio resource utilization entity that leaves single-frequency network area to needs sends the message that is used to remove allocation of radio resources.

A kind of MBMS radio resource utilization entity comprises:

Receiving element is used to receive the message that MCE sends, and perhaps further receives the single-frequency network area relevant information that adjacent MBMS radio resource utilization entity sends;

Control unit is used for knowing that according to the message of described single-frequency network area relevant information or MCE transmission this entity is in the single-frequency network area edge, is changed to rim condition with the single-frequency network area location status;

Transmitting element is used for sending rim condition information to subscriber equipment.

A kind of subscriber equipment comprises:

Receiving element is used to receive the single-frequency network area location status information of this entity of the single-frequency network area relevant information of the adjacent MBMS radio resource utilization entity that ownership MBMS radio resource utilization entity sends or transmission;

Analytic unit is used for analyzing the MBMS radio resource utilization entity that belongs to the edge according to described single-frequency network area relevant information, perhaps knows the MBMS radio resource utilization entity that belongs to the edge according to the single-frequency network area location status information of described entity;

Transmitting element sends second message that is used to ask to expand single-frequency network area when being used to know the MBMS radio resource utilization entity that belongs to the edge.

A kind of communication system comprises:

MBMS radio resource utilization entity, comprising: be used to receive the message that MCE sends, perhaps further receive the receiving element of the single-frequency network area relevant information of adjacent MBMS radio resource utilization entity transmission; Be used for knowing that according to the message of described single-frequency network area relevant information or MCE transmission this entity is in the single-frequency network area edge, is changed to the single-frequency network area location status control unit of rim condition; Be used for sending the transmitting element of rim condition information to subscriber equipment;

Multicast coordination entity MCE, comprising: the receiving element that is used to receive the message that MBMS radio resource utilization entity sends; Be used for setting up, expanding and/or shrink the decision unit of single-frequency network area according to described message decision; Be used for the decision made according to described decision unit, need determine to add and/or the MBMS radio resource utilization entity that leaves single-frequency network area order unit really; The MBMS radio resource utilization entity that is used for adding to needs single-frequency network area sends information of radio resource allocation, and/or the MBMS radio resource utilization entity that leaves single-frequency network area to needs sends the transmitting element of the message that is used to remove allocation of radio resources.

By the MCE decision of concrete management MBMS business and foundation, expansion and the contraction of control SFN area, help the unified management and the distribution of SFN area Radio Resource in the present embodiment.

Present embodiment provides the method for dynamic or semi-static expansion SFN area, guarantees the continuity of UE MBMS business when mobile, makes UE receive the signal of enhancing, improves reception.

Present embodiment also provides the method for dynamic or semi-static contraction SFN area, can save Internet resources.

Present embodiment provides various configurations guard the method for area, the co-channel interference of minimizing and SFN area, the reception of raising UE.

Present embodiment provides the method for setting up and dispose SFN area, realizes the flexible configuration of SFN area.

The method that present embodiment provides MBMS radio resource utilization entity to know and notify this entity of UE to be in the SFNarea edge is convenient to dispose SFN area.

Description of drawings

Fig. 1 is the structural representation of communication system in the embodiment of the invention;

Fig. 2 is the structural representation of communication system among the UMTS in the embodiment of the invention;

Fig. 3 is the structural representation of communication system in the LTE system in the embodiment of the invention;

Fig. 4 is the structural representation of communication system during the same entity of MCE and eNB in the LTE system in the embodiment of the invention;

Fig. 5 is the structural representation of MCE in the embodiment of the invention;

Fig. 6 is the structural representation of eNB in the embodiment of the invention;

Fig. 7 is the structural representation of UE in the embodiment of the invention;

Fig. 8 is for dynamically setting up the method flow diagram of SFN area in the embodiment of the invention;

Fig. 9 is according to the method flow diagram of configuration information dynamic-configuration SFN area in the embodiment of the invention;

Figure 10 is the main method flow chart of dynamic expansion SFN area in the embodiment of the invention;

Figure 11 is the concrete grammar flow chart of first kind of dynamic expansion SFN area in the embodiment of the invention;

Figure 12 is the concrete grammar flow chart of second kind of dynamic expansion SFN area in the embodiment of the invention;

Figure 13 is the eNB position view during dynamic expansion SFN area in the embodiment of the invention;

Figure 14 is the concrete grammar flow chart of the third dynamic expansion SFN area in the embodiment of the invention;

Figure 15 is the main method flow chart that dynamically shrinks SFN area in the embodiment of the invention;

Figure 16 is first kind of concrete grammar flow chart that dynamically shrinks SFN area in the embodiment of the invention;

Figure 17 is second kind of concrete grammar flow chart that dynamically shrinks SFN area in the embodiment of the invention;

Figure 18 is the eNB position view when dynamically shrinking SFN area in the embodiment of the invention;

Figure 19 is the third concrete grammar flow chart that dynamically shrinks SFN area in the embodiment of the invention.

Embodiment

In order to realize the dynamic or semi-static configuration of SFN area, mainly control and determine dynamic or semi-static foundation, expansion and the contraction of SFN area in the present embodiment by MCE.Present embodiment is that example describes with dynamic foundation, expansion and contraction SFN area, and the method for semi-static configuration SFN area can be with reference to dynamic configuration method.

For configuration mode, generally include static state, semi-static and dynamic.At the configuration mode of SFN area, static configuration is meant that the eNB of SFN area inside fixes, by default configuration information decision.Dynamic-configuration is meant that the eNB of SFN area inside can change dynamically according to moving of UE.Semi-static configuration is between dynamic and static state, also allows the variation of SFN area when allowing configuration, does not have strict difference between itself and the dynamic-configuration.

The reason that causes SFN area expansion or shrink has multiple, and be the UE registration or nullify the MBMS business as a kind of, be that UE carries out MBMS radio resource utilization entity and switches as another kind.Generally, because UE carries out that the zone is switched or the gravity treatment meeting causes the switching of MBMS radio resource utilization entity.

MBMS radio resource utilization entity comprises eNB, (the Radio Network Controller of the radio network controller among the UMTS among the LTE in the present embodiment, RNC) or high-speed packet insert (High-SpeedPacketAccess Plus, HSPA+) the control RNC (CRNC) in the system.

In the present embodiment zone comprise sub-district in the LTE system or tracking area (Tracking area, TA), the sub-district among the UMTS, route district (Routing area, RA) or the lane place (Location area, LA).

Accordingly, area update message comprises cell update message (CellUpdate) or tracing section updating message (the Tracking Area Update in the LTE system in the present embodiment, TAU), the cell update message among the UMTS, Routing Area Update message or location area updating message.

SFN area comprises the edge (abbreviation edge) of SFN area inside and the non-edge (being called for short non-edge) of SFN area inside.The edge is meant: be in the MBMS radio resource utilization entity among the SFN area, exist a MBMS radio resource utilization entity that is in SFN area outside to be adjacent at least, such MBMS radio resource utilization entity has constituted the edge of SFN area.Non-edge is meant: be in the MBMS radio resource utilization entity among the SFNarea, and its whole adjacent MBMS radio resource utilization entities all are in SFN area inside, such MBMS radio resource utilization entity has constituted the non-edge of SFN area.In the present embodiment, the MBMS radio resource utilization entity that is in the edge is called edge MBMS radio resource utilization entity, and the MBMS radio resource utilization entity that is in non-edge is called non-edge MBMS radio resource utilization entity.

Outer peripheral areas (guard area) is meant in the zone beyond the SFN area, the zone that all MBMS radio resource utilization entities adjacent with SFN area are constituted, and these MBMS radio resource utilization entities are adjacent MBMS radio resource utilization entities of edge MBMS radio resource utilization entity.In the present embodiment, the MBMS radio resource utilization entity of this intra-zone is called peripheral MBMS radio resource utilization entity.

Present embodiment provides the method for multiple dynamic foundation or configuration SFN area, as a kind of method of dynamically setting up SFNarea be: MCE is configured the MBMS radio resource utilization entity of needs according to the result of each MBMS radio resource utilization entity statistics counting, make it transmit same MBMS business at one time, set up SFN area with identical frequency band.As another kind of method be: MCE is according to the configuration information of this locality, and regularly the MBMS radio resource utilization entity to appointment in the configuration information is configured, and dynamically sets up, expands and contraction SFN area.

Present embodiment provides the method for multiple dynamic expansion SFN area, as first method is: MCE judges whether to expand SFN area according to the result of each MBMS radio resource utilization entity statistics (counting).As second method is that UE initiatively sends extended request message when finding to belong to edge MBMS radio resource utilization entity, and MCE judges whether to expand SFN area according to this message.As the third method is that UE carries out regional gravity treatment or initiatively sending zone updating message of back is switched in the zone, and MCE judges whether to expand SFN area according to this message.

Present embodiment provides the method for multiple dynamic contraction SFN area, as a kind of method is: MCE judges whether to shrink SFN area according to the result of each MBMS radio resource utilization entity statistics.As another kind of method be: the message that initiatively sends according to UE judges whether to shrink SFN area.The message that UE initiatively sends is carried out MBMS radio resource utilization entity as: UE and is switched the area update message that comprises source MBMS radio resource utilization entity that the back sends.As another method be: according to UE initiatively send leave request message or de-registration request message judges whether to shrink SFN area.

Be that example describes mainly below with the LTE system.In the LTE system of present embodiment, MBMS radio resource utilization entity is meant eNB, and the zone is meant the sub-district, and the corresponding sub-district of eNB is so the switching of eNB just can take place when carrying out sub-district gravity treatment or sub-district switching UE.

Referring to Fig. 1, communication system comprises upstream node, MCE, eNB and the UE of eNB in the present embodiment.The upstream node of this eNB comprises mobile management entity (Mobile Management Entiey, MME), user entity (User Plane Entiey, UPE), broadcast multicast service center (broadcast multicast service center, BM-SC) and (the Operation ﹠amp of operation maintenance center; Maintenance Center, OMC) etc.For UMTS, this communication system comprises Serving GPRS Support Node (Serving GPRS Support Node, SGSN), Gateway GPRS Support Node (Gateway GPRS Support Node, GGSN), MCE, RNC and BM-SC, referring to shown in Figure 2, wherein, SGSN is corresponding to MME, GGSN is corresponding to UPE, and RNC is corresponding to eNB.(UPE for MBMS mUPE), is used for the logic entity of data stream management to the upstream node of eNB, the head compression of MBMS, the distribution of MBMS content-data, and be the terminal point of synchronous protocol in order to be used for the MBMS user plane entity in the present embodiment.MUPE is a logic entity, for example can be in UPE.

The upstream node of eNB is according to the message that joins request of described eNB or described MCE transmission, the eNB that needs is added single-frequency network area adds the content distribution tree, and/or, according to the de-registration request message of described eNB or described MCE transmission, the eNB that needs is left single-frequency network area deletes from the content distribution tree.

MCE is a logic module, it can be an independently node, referring to shown in Figure 3, also can be in existing network entity, existing network entity such as MME/UPE, BM-SC, OMC or eNB etc., wherein, OMC can be connected with MCE, as shown in Figure 3, also can be connected, be connected to example with OMC and MCE in the present embodiment and describe with other entities such as MME.Be combined into the network structure of an entity referring to MCE shown in Figure 4 and eNB.In the present embodiment, be that an isolated node is that example describes with MCE.MCE control and distribute the MBMS Radio Resource, according to message that receives from eNB or local configuration information, decision is set up, expansion or shrink SFN area, and the extinction of SFN area can be thought the limit of shrinking.The eNB that MCE need make SFN area inside the identical time with the same MBMS business of the frequency band transmission of system, make the eNB of SFN area inside add the content distribution tree, and send information of radio resource allocation (comprising subcarrier information and/or band information) etc. to it.MCE can be directly or indirectly and eNB carry out alternately.Be meant that directly for example, MCE and MME belong to an entity, or when being isolated node and eNB directly mutual.Be meant that indirectly for example, when MCE and BM-SC belonged to an entity, MCE and eNB need be undertaken by MME alternately.

MCE can send to eNB with information of radio resource allocation by message or file, perhaps sends download address and file identification to eNB, and indication eNB downloads information of radio resource allocation.Carrying information of radio resource allocation with form of message in the present embodiment is that example describes.

MCE also needs to make edge eNB to keep being prepared as the state of UE service, when serving at least one UE as if discovery edge eNB, needs expansion SFN area, guarantees the MBMS business continuance when UE moves.MCE still needs to make non-edge eNB to keep being at least the state of a UE service, if when finding that non-edge eNB and adjacent eNB thereof no longer serves for UE, need contraction SFN area, and can save Internet resources.MCE sends corresponding message according to the attribute of judged result and SFN area to each eNB.MCE has SFN area location status information or the guard area location status information of eNB, SFN area location status information comprises edge and non-edge, also there is the UE quantity of having registered the MBMS business in each eNB coverage, and the sign of the adjacent eNB of each eNB.

ENB represents a plurality of eNB.ENB makes various responses and returns response message according to the message that MCE sends.The eNB of SFN area inside sends the MBMS business datum with the same wireless resource in the identical frequency band to the UE that has registered the MBMS business simultaneously.The eNB of guard area inside will limit or stop using the Radio Resource identical with SFN area.Can directly carry out alternately by X2 interface between adjacent two eNB, eNB can obtain the SFN area relevant information of adjacent eNB, comprise the information of radio resource allocation (comprising subcarrier information and/or frequency band) of SFN area location status information, SFN area sign and service identifiers, SFN area etc., can judge the position of adjacent eNB by SFN area relevant information, in SFN area edge, non-edge or outside (being guard area inside).ENB is interference coordination (Inter-cell interference considerations between triggering cell as required, ICIC) process or transmission resource coordination Indication message make the eNB of guard area inside will limit or stop using the Radio Resource identical with SFN area.When triggering the ICIC process, can be undertaken alternately by direct or indirect mode between two eNB.Wherein, the ICIC process comprises that expression is used for the mark of SFN transmission.

UE (comprises MBMS point-to-multipoint control channel (MBMS point-to-multipoint Control Channel by monitoring control channel, MCCH) or Broadcast Control Channel (Broadcast Control Channel, BCCH)) the SFN area relevant information of acquisition attributive eNB and adjacent eNB, it can be SFN area positional information, also can be other SFN area relevant information, UE analyzes SFN area positional information according to other SFN area relevant information.UE is known when belonging to edge eNB to MCE request expansion SFN area, perhaps after carrying out sub-district gravity treatment or cell update, send cell update message to MCE, cell update message can comprise the sign of source eNB, and MCE can and shrink SFN area according to cell update message decision expansion.

Referring to Fig. 5, MCE comprises receiving element 501, decision unit 502, determining unit 503, memory cell 504 and transmitting element 505 in the present embodiment.

Memory cell 504 has configuration information, SFN area relevant information, also had sign, SFN area or the guard area location status information of each eNB, the corresponding registration UE quantity of MBMS business and sign of adjacent eNB etc.Each memory cell can be storage mediums such as floppy disk, hard disk and tape in the present embodiment.

The various message that receiving element 501 external entities send, in the present embodiment, receive extended request message, the message that has statistics, cell update message, login request message and relevant response message that eNB sends, receive the configuration information that other node sends, other node comprises BM-SC, MME and OMC.

Decision unit 502 determines to set up, expands or shrinks SFN area according to message or the configuration information in the memory cell 504 that eNB sends.

Determining unit 503 determines to need to add or leave the eNB of single-frequency network area according to the decision of decision unit 502; Register to mUPE, in the present embodiment be, send the message that joins request to mUPE and (or claim MBMS registration request, the MBMS register requirement), request will need the eNB that adds SFN area to add the content distribution tree, and it is set up with the data surface carrying of mUPE and to it send information of radio resource allocation, make its with other eNB of SFN area inside the identical time with the same MBMS business of identical frequency band transmission; And to mUPE transmission de-registration request message, request is deleted the eNB that needs leave SFN area from the content distribution tree, and sends the message relevant with resource coordination to it, makes its restriction use the frequency band identical with described single-frequency network area; The relevant information of storage in the updated stored unit 503.

503 indications send various indications and request message to eNB and mUPE to transmitting element 505 according to determining unit, comprise expansion Indication message, resource coordination Indication message, extended response message, cell update response message, the message that joins request and de-registration request message etc.

Referring to Fig. 6, eNB comprises receiving element 601, control unit 602, memory cell 603 and transmitting element 604 in the present embodiment.

Memory cell 603 has the sign of SFN area location status information and adjacent eNB etc.

Receiving element 601 receives extended request message, cell update message, login request message, de-registration request message that UE send, leaves request message and handoff request message etc., and receive expansion Indication message that MCE sends, resource coordination Indication message, extended response message, cell update response message etc., further receive adjacent eNB and send SFN area location status information and SFN area relevant information etc.

Control unit 602 knows that according to the message of described single-frequency network area relevant information or MCE transmission this entity is in the single-frequency network area edge, and, the message that is used for active or sends according to MCE, statistics has been registered the UE quantity of MBMS business, indication transmitting element 604 sends the UE quantity of having registered the MBMS business to MCE, perhaps statistics has been registered the UE quantity of MBMS business and has been found that this quantity is greater than after 0, indication transmitting element 604 sends the expansion Indication message to adjacent eNB, and send information of radio resource allocation to adjacent eNB according to the indication of MCE, send the message that joins request to mUPE, request adds the content distribution tree with adjacent eNB, sets up the data surface carrying with mUPE.

Transmitting element 604 sends various response messages according to the indication of control unit 602 to UE, sends SFN area location status information, SFN area relevant information by control channel, sends various message etc. to MCE.

Referring to Fig. 7, UE comprises receiving element 701, analytic unit 702, memory cell 703 and transmitting element 704 in the present embodiment.

The SFN area location status information of memory cell 703 store home eNB etc.

Receiving element 701 receives SFN area location status information, SFN area relevant information and the various response message that eNB sends.

Whether analytic unit 702 generates extended request message according to the information analysis that eNB sends; Carrying out generating the cell update message that has source eNB sign after switch sub-district gravity treatment or sub-district; Neighbor cell is measured, analyzed whether generate extended request message; And generate login request message when needed, nullify MBMS business request information etc.

Transmitting element 704 sends extended request message, cell update message, login request message, cancellation MBMS business request information and handoff request message etc. according to the indication of analytic unit 702 to eNB.

Referring to Fig. 8, the method flow that MCE dynamically sets up SFN area according to statistics in the present embodiment is as follows:

Step 801:MCE sends the statistics instruction according to the configuration information of this locality to eNB, requires to have registered in the eNB statistics overlay area UE quantity of MBMS business.

Step 802:eNB carries out statistical operation after receiving the statistics instruction, and returns statistics to MCE.

The statistics instruction that MCE issues can also comprise cycle information, and eNB can report the UE quantity of having registered the MBMS business automatically according to cycle information later.

Whether step 803:MCE judges the statistics of receiving greater than 0, and request mUPE will add content distribution tree (or claiming the MBMS multicast group) greater than the pairing eNB of 0 statistics, set up the data surface carrying with mUPE.

Step 804:MCE sends information of radio resource allocation to eNB, the eNB that makes SFN area inside the identical time with the same MBMS business of identical frequency band transmission.

Step 805:MCE further sends SFN area relevant information to eNB, and this information can comprise SFN area location status information, and eNB is directly known and laid oneself open to SFN area edge or non-edge.

Perhaps MCE further sends the SFN area relevant information of its adjacent eNB to eNB, and the SFN area relevant information of eNB by adjacent eNB analyzes and lay oneself open to SFN area edge or non-edge.

Perhaps eNB and adjacent eNB are mutual, obtain the SFN area relevant information of adjacent eNB, and analyze and lay oneself open to SFN area edge or non-edge.

Step 806: edge eNB has registered the UE transmission SFN area location status information of MBMS business or has sent the SFN area relevant information of adjacent eNB in coverage, UE is known belonged to edge eNB, perhaps further know the SFN area location status information of adjacent eNB.

Referring to Fig. 9, MCE is according to the configuration information of this locality in the present embodiment, and regularly the eNB to appointment in the configuration information is configured, and realizes that the concrete grammar flow process of dynamic-configuration SFN area is as follows:

Step 901:MCE sets up SFN area according to the configuration information of this locality, send wireless resource configuration in the very first time to the eNB of appointment, and send the message that joins request to mUPE, make the eNB of appointment add the content distribution tree, and the data surface of foundation and mUPE carry.

MCE can repeatedly obtain configuration information from other node, and according to latest configuration information dynamic-configuration SFN area.

Step 902:MCE according to the configuration information of this locality at the second temporal extension SFN area, in this time, need the eNB that adds SFN area to send wireless resource configuration, and send the message that joins request to mUPE, request will need the eNB that adds SFN area to add the content distribution tree, and the carrying of the data surface of foundation and mUPE.

Step 903:MCE shrinks SFN area according to the configuration information of this locality in the 3rd time, the eNB that leaves SFN area to the needs of appointment sends it and sends and remove radio-resource-configuration message, notify its termination that MBMS is provided business service, and to mUPE transmission de-registration request message, request is deleted the eNB that needs leave SFN area from the content distribution tree.MCE can further send the resource coordination Indication message to the eNB that leaves, and makes its restriction use the frequency band identical with described single-frequency network area.

Second time can be identical with the 3rd time.

Referring to Figure 10: the main method flow process of MCE dynamic expansion SFN area is as follows in the present embodiment:

Step 1001:eNB sends message to MCE, comprises having UE number of messages, extended request message and the cell update message of having registered the MBMS business.

The message that step 1002:MCE sends according to eNB and with respect to the position of SFN area, decision expansion SFN area, and determine to need to add the eNB of SFN area.The eNB that adds SFN area can be eNB and the part or all of adjacent eNB thereof that sends message.

Step 1003:MCE sends information of radio resource allocation to the eNB that needs add SFN area, and send the message that joins request to mUPE, request will need the eNB that adds SFN area to add the content distribution tree, the data surface carrying of foundation and mUPE makes it transmit same MBMS business with other eNB of SFN area inside simultaneously with identical frequency band.

Referring to Figure 11, MCE is as follows according to the concrete grammar flow process of the SFN of the dynamic expansion as a result area of each eNB statistics counting in the present embodiment:

Step 1101:MCE sends the message that has the statistics instruction according to the configuration information of this locality to eNB, requires to have registered in the eNB statistics overlay area UE quantity of MBMS business.

Step 1102:eNB carries out statistical operation after receiving the statistics instruction, and returns statistics to MCE.

The statistics instruction that MCE issues can also comprise cycle information, and eNB can report the UE quantity of having registered the MBMS business automatically according to cycle information.

Step 1103:MCE finds to be in statistics that the eNB of SFN area outside returns greater than 0 o'clock decision expansion SFN area, send information of radio resource allocation to it, and send the message that joins request to mUPE, request should add the content distribution tree by outside eNB, and the data surface carrying that makes this outside eNB foundation and mUPE, perhaps further send service identifiers, SFN area sign, modulation coding mode, the transmission mode of SFN, APN (Access Point Name, APN), Temporary Mobile Group Identity (Temporary Mobile Group Identity, TMGI), session identification (SESSION ID), MBMS data source address information and mUPE information etc.

Step 1104:MCE further adds SFN area with the adjacent eNB of the eNB of described outside.

Step 1105: the eNB that receives information of radio resource allocation returns response message to MCE.

MCE can send information of radio resource allocation to eNB, sends the message that joins request by the eNB that receives information of radio resource allocation to mUPE, and request adds the content distribution tree, and the carrying of the data surface of foundation and mUPE.

When MCE does not receive the response message that eNB returns in the time of expection, can send corresponding message once more.

Step 1106:MCE is in SFN area outside in the adjacent eNB of the eNB that adds SFN area eNB (eNB in the guard area after promptly being in renewal) sends the resource coordination Indication message, makes its restriction use the Radio Resource identical with SFN area.The resource coordination Indication message comprises the information of radio resource allocation of SFN area etc.Carry out this step and can reduce co-channel interference.

Perhaps, the eNB of MCE indication adding SFN area sends message to its adjacent peripheral eNB, makes the adjacent eNB restriction use the Radio Resource identical with SFN area.ENB is by the resource coordination Indication message or trigger the ICIC process, notifies its adjacent eNB restriction to use the Radio Resource identical with SFN area.ICIC comprises that expression is used for the mark of SFN transmission.

MCE is after determining to need the eNB of adding SFN area, and the eNB in the guardarea after being in renewal sends the resource coordination Indication message earlier, and the eNB to needs adding SFN area sends information of radio resource allocation again.Can before edge eNB MBMS transmission business, just limit or forbid the Radio Resource that the eNB in the guard area uses like this, better reduce or avoid co-channel interference.

Present embodiment also provides a kind of implementation, in step 1101 to step 1104, the eNB that is in SFN area edge adds up the UE quantity of having registered the MBMS business in the overlay area, find that this quantity sent extended request message greater than 0 o'clock to MCE, edge eNB can be initiatively or the Indication message that sends according to MCE carry out statistical operation.MCE is according to receiving extended request message, and the part or all of adjacent eNB that is in SFN area outside in the adjacent eNB with this edge eNB adds SFN area, continues step 1105 then.

Present embodiment provides a kind of implementation again, to step 1103, is in SFN area outside in step 1101, when promptly the eNB in the guard area receives the register requirement of UE transmission, to MCE requesting activation MBMS business.After MCE receives request,, continue step 1104 then to this eNB adding of major general SFN area.

Referring to Figure 12, MCE knows that according to UE the concrete grammar flow process of the extended request message dynamic expansion SFN area that sends when belonging to edge eNB is as follows in the present embodiment:

Step 1201:UE knows that by monitoring control channel attributive eNB is in SFN area edge.UE can be the SFN area location status information (being rim condition) that directly obtains eNB, perhaps obtains the SFN area relevant information of adjacent eNB, analyzes attributive eNB and is in SFN area edge.For example, in the SFN area relevant information of part adjacent eNB, do not comprise the service identifiers of this SFN area sign or UE registration, illustrate that described part adjacent eNB is in SFN area outside.

UE carries out knowing that attributive eNB is in SFN area edge after switch sub-district gravity treatment or sub-district, for example, referring to shown in Figure 13, shadow representation SFN area wherein, blank expression guard area.UE moves to eNB-1 from eNB-6.Perhaps, UE knows that attributive eNB is in SFN area edge after having registered the MBMS business.After mainly moving to eNB-1 with UE below is that example describes.

Step 1202:UE measures neighbor cell, judges whether to exist the neighbor cell of coincidence measurement condition, if, then continue step 1203, otherwise termination process.Described measurement comprises Common Pilot Channel (Common Pilot Channel, CPICH) measurement, MBMS point multipoint message traffic channel (MBMSpoint-to-multipoint Traffic Channel, MTCH) measurement, error rate measurement, channel quality indication (Channel Quality Indication, CQI) measurement, load measure and priority measurement etc.

In the present embodiment, above-mentioned measuring condition is higher than UE and carries out sub-district gravity treatment or the sub-district measuring condition when switching, promptly carry out before sub-district gravity treatment or the sub-district switching possible target eNB being added SFN area, can guarantee the UE MBMS business continuance when sub-district gravity treatment or sub-district switching in the future at UE.

UE is execution in step 1202 not also, directly execution in step 1203.UE execution in step 1202 can the delayed delivery extended request message, promptly postpones expansion SFN area, and can autotelic expansion SFNarea, the saving Internet resources.

Step 1203:UE sends extended request message to eNB-1, and this extended request message comprises the sign of the eNB of coincidence measurement condition, and for example, the eNB of coincidence measurement condition has eNB-18 and eNB-2.

Step 1204:eNB-1 is transmitted to MCE with this extended request message.

Whether step 1205:MCE meets judgment condition according to label detection eNB-18 in the extended request message and eNB-2, judgment condition comprises: whether exceed maximum SFN area, whether its load is less than default threshold value, whether belong to the eNB that allows to add SFN area in the local configuration information, whether do not belong to the eNB that forbids adding SFN area in the local configuration information.

If skips steps 1202, MCE can judge the adjacent eNB (being eNB-18, eNB-2 and eNB-16) of eNB-1.If MCE does not have the sign of the adjacent eNB of eNB-1, so, UE can comprise the sign of adjacent eNB in the extended request message of its transmission, comprise the into sign of adjacent eNB when perhaps transmitting extended request message by eNB-1, and MCE judges identifying pairing eNB.

Step 1206:MCE finds that eNB-18 and eNB-2 all meet judgment condition, so, MCE sends the expansion Indication message to eNB-18 and eNB-2, send information of radio resource allocation by this message, perhaps further comprise transmission mode, APN, TMGI, SESSION ID, MBMS data source address information and the mUPE information of service identifiers, single-frequency network area sign, modulation coding mode, SFN.

If eNB-18 and eNB-2 all do not meet judgment condition, then termination process.

Step 1207:eNB-18 and eNB-2 return expansion indication response message after receiving the expansion Indication message.

Step 1208:MCE sends extended response message to eNB-1.

Perhaps, in step 1206, MCE does not directly send the expansion Indication message to eNB-18 and eNB-2, and in step 1208, MCE sends the expansion Indication message by extended response message (also can be to send Indication message once more) indication eNB-1 to eNB-18 and eNB-2, and this extended response message comprises the sign of eNB-18 and eNB-2.

Step 1209:eNB-1 sends extended response message to UE.

Step 1210:eNB-1 changes SFN area location status information into non-rim condition, and stops to send rim condition information to UE, also can further send non-rim condition information to UE.

ENB-1 also can change SFN area location status information into non-rim condition automatically after sending extended request message, if when not receiving extended response message in the time of expection, change SFN area location status information into rim condition again.

Step 1211:MCE sends the message that joins request to mUPE, and request mUPE adds the content distribution tree with eNB-18 and eNB-2, and makes the data surface carrying of eNB-18 and eNB-2 foundation and mUPE.

Perhaps send the message that joins request to mUPE, add the content distribution tree by eNB-18 that receives the expansion Indication message and eNB-2, and the carrying of the data surface of foundation and mUPE.

Perhaps MCE is by extended response message (also can send other Indication message once more), further indication eNB-1 sends the message that joins request to mUPE, request mUPE adds the content distribution tree with eNB-18 and eNB-2, and makes the data surface carrying of eNB-18 and eNB-2 foundation and mUPE.

Step 1212:MCE sends the resource coordination Indication message to the eNB (being eNB-36, eNB-35, eNB-3 and eNB-33) that needs add guard area, by this message informing eNB-36, eNB-35, eNB-3 and eNB-33 restriction or ban use of the Radio Resource identical, this resource coordination Indication message to comprise SFN area information of radio resource allocation and SFN area sign etc. with SFN area.

Perhaps, MCE sends the message relevant with resource coordination to eNB-36, eNB-35, eNB-3 and eNB-33 by expansion Indication message indication eNB-18 respectively with eNB-2.ENB-18 can or ban use of the Radio Resource identical with SFN area by resource coordination Indication message notice eNB-36, eNB-35, eNB-3 and eNB-33 restriction with eNB-2, perhaps by being used for ICIC notice eNB-36, eNB-35, eNB-3 and the eNB-33 of SFN transmission, this ICIC comprises the mark of sign SFN transmission.

Step 1213:eNB-36, eNB-35, eNB-3 and eNB-33 return the resource coordination response message to MCE.

In step 1202, the CPICH transmitting power that UE judges neighbor cell is during greater than the CPICH transmitting power of this sub-district, the CPICH transmitting power of perhaps judging neighbor cell is greater than the CPICH transmitting power of this sub-district and its difference during greater than default threshold value, the CPICH transmitting power of perhaps judging neighbor cell is during greater than default threshold value, and the sign of this adjacent eNB is added in the extended request message.

When perhaps the UE MTCH power of further judging neighbor cell is greater than the MTCH power of this sub-district, the MTCH power of perhaps judging neighbor cell is greater than the MTCH power of this sub-district and its difference during greater than default threshold value, the MTCH power of perhaps judging neighbor cell is during greater than default threshold value, and the sign of this adjacent eNB is added in the extended request message.

When perhaps the UE error rate of further judging neighbor cell is less than the error rate of this sub-district, the error rate of perhaps judging neighbor cell is less than the error rate of this sub-district and its difference during greater than default threshold value, the error rate of perhaps judging neighbor cell is during less than default threshold value, and the sign of this adjacent eNB is added in the extended request message.

When perhaps the UE CQI value of further judging neighbor cell is greater than the CQI value of this sub-district, the CQI value of perhaps judging neighbor cell is greater than the CQI value of this sub-district and its difference during greater than default threshold value, the CQI value of perhaps judging neighbor cell is during greater than default threshold value, and the sign of this adjacent eNB is added in the extended request message.

When perhaps the UE load measure value of further judging neighbor cell is less than the load measure value of this sub-district, the load measure value of perhaps judging neighbor cell is less than the load measure value of this sub-district and its difference during greater than default threshold value, the load measure value of perhaps judging neighbor cell is during less than default threshold value, and the sign of this adjacent eNB is added in the extended request message.

When perhaps the UE priority of further judging neighbor cell is higher than the priority of this sub-district, when the priority of perhaps judging neighbor cell is higher than the priority of this sub-district and its difference greater than default threshold value, when the priority of perhaps judging neighbor cell is higher than default threshold value, the sign of this adjacent eNB is added in the extended request message.

In step 1204, eNB-1 can judge whether earlier that other UE sends extended request message, perhaps judge whether expanding flow process (promptly, this eNB-1 is carrying out the expansion flow process and is not changing SFN area location status into non-rim condition), if then abandon the extended request message that this UE sends, perhaps temporarily keep this extended request message, after the expansion flow process completes successfully, abandon this extended request message, otherwise the extended request message that this UE is sent is transmitted to MCE.

In step 1205, MCE judges whether eNB-18 and eNB-2 have exceeded maximum single-frequency network area, and the eNB that decision does not exceed maximum single-frequency network area adds SFN area.

Perhaps MCE further judge eNB-18 and eNB-2 load whether less than default threshold value, decision is satisfied load and is added SFN area less than the eNB of threshold value.

Perhaps MCE judges further whether eNB-18 and eNB-2 belong to the eNB that allows to add SFN area in the local configuration information, and the eNB that decision is put down in writing adds SFN area.

Perhaps MCE judges further whether eNB-18 and eNB-2 belong to the eNB that forbids adding SFN area in the local configuration information, and the eNB that decision is not put down in writing adds SFN area.

To step 1204, UE measures neighbor cell in step 1202, and sends measurement result by eNB-1 to MCE.After MCE analyzes measurement result, judge whether to exist the neighbor cell of coincidence measurement condition, if, then, corresponding eNB (as eNB-18 and eNB-2) is added SFN area, and continue step 1205 according to the eNB sign of measurement result correspondence, otherwise termination process.

For example, the measurement result that MCE receives comprises eNB-2, CPICH transmission power level, and MCE compares CPICH transmission power level and the threshold value of presetting so, when finding the CPICH transmission power level greater than threshold value, selects eNB-2 is added SFN area.Perhaps measurement result comprises eNB-2, CPICH, 1, and what MCE found the CPICH correspondence so is 1, and expression UE has judged the CPICH transmitting power and met preset condition, then selects eNB-2 is added SFN area.

Corresponding expansion Indication message, extended response message, resource coordination Indication message and the message that joins request that MCE sends to each eNB and mUPE respectively, and do not have strict sequencing.Wherein a kind of preferable mode is, MCE is after determining to need to add the eNB of SFN area, and the eNB in the guardarea after being in renewal sends the resource coordination Indication message earlier, and the eNB that adds SFN area to needs sends information of radio resource allocation again.Can before edge eNB MBMS transmission business, just limit or forbid the Radio Resource that the eNB in the guard area uses like this, better reduce or avoid co-channel interference.

Referring to Figure 14, MCE is as follows according to the concrete grammar flow process of the cell update message dynamic expansion SFNarea of UE transmission in the present embodiment:

Step 1401: the UE behind sub-district gravity treatment or the sub-district handover success sends cell update message to attributive eNB-1.

Step 1402:eNB-1 gives MCE with the cell update forwards.

Step 1403:eNB-1 sends the cell update response message to UE.

After step 1404:MCE receives cell update message, check whether the eNB-1 that sends cell update message is in SFN area edge, if, then continue step 1404, otherwise termination process.

Still be that example describes below with Figure 13, MCE receives the cell update message that eNB-1 sends.

Whether the adjacent eNB (being eNB-18, eNB-2 and eNB-16) that is in SFN area outside in the adjacent eNB of step 1405:MCE detection eNB-1 meets judgment condition, judgment condition comprises: whether exceed maximum SFN area, whether its load is less than default threshold value, whether belong to the eNB that allows to add SFN area in the local configuration information, whether do not belong to the eNB that forbids adding SFN area in the local configuration information.

Step 1406:MCE finds that eNB-18, eNB-2 and eNB-16 all meet judgment condition, so, MCE sends the expansion Indication message to eNB-18, eNB-2 and eNB-16, sends transmission mode, APN, TMGI, SESSION ID, MBMS data source address information and the mUPE information of information of radio resource allocation and service identifiers, single-frequency network area sign, modulation coding mode, SFN by this message.

Step 1407:eNB-18, eNB-2 and eNB-16 receive that the expansion Indication message returns expansion indication response message.

Step 1408:MCE sends the cell update response message to eNB-1.

Step 1409:MCE sends the message that joins request to mUPE, and request adds the content distribution tree with eNB-18, eNB-2 and eNB-16, and the carrying of the data surface of foundation and mUPE.

Perhaps send the message that joins request by the eNB-18, the eNB-2 that receive the expansion Indication message and eNB-16 to mUPE, request adds the content distribution tree, and the carrying of the data surface of foundation and mUPE.

Perhaps MCE sends the message that joins request by cell update response message indication eNB-1 to mUPE, and request adds the content distribution tree with eNB-18, eNB-2 and eNB-16, and the carrying of the data surface of foundation and mUPE.

Step 1410:MCE sends the resource coordination Indication message to the eNB (being eNB-36, eNB-35, eNB-3, eNB-33 and eNB-32) that needs add guard area, by this message informing eNB-36, eNB-35, eNB-3, eNB-33 and eNB-32 restriction or ban use of the Radio Resource identical, this resource coordination Indication message to comprise SFN area information of radio resource allocation and SFNarea sign etc. with SFN area.

Perhaps, MCE sends the message relevant with resource coordination to eNB-36, eNB-35, eNB-3, eNB-33 and eNB-32 by the indication of expansion Indication message eNB-18, eNB-2 respectively with eNB-16.ENB-18, eNB-2 can or ban use of the Radio Resource identical with SFN area by resource coordination Indication message notice eNB-36, eNB-35, eNB-3, eNB-33 and eNB-32 restriction with eNB-16, perhaps by being used for ICIC notice eNB-36, eNB-35, eNB-3, eNB-33 and the eNB-32 of SFN transmission, this ICIC comprises that sign is used for the mark of SFN transmission.

Step 1411:eNB-36, eNB-35, eNB-3, eNB-33 and eNB-32 return the resource coordination response message to MCE.

Said method is the method for dynamic expansion SFN area, at UE sub-district gravity treatment or switching back, sub-district or UE taking place knows that belonging to edge eNB expands SFN area, guarantee the continuity of MBMS business when UE moves, and one extension can satisfy the expansion demand of a plurality of UE simultaneously.Accordingly, expansion all is accompanied by contraction usually, introduces the method for dynamically shrinking SFN area below, can save Internet resources.

Referring to Figure 15, dynamically to shrink the main method flow process of SFN area as follows for MCE in the present embodiment:

ENB in the step 1501:SFN area sends message, and these related news comprise that having statistics has registered UE number of messages, the cell update message of MBMS business, left request message and de-registration request message.

Step 1502:MCE shrinks SFN area according to the message decision that the eNB in the SFN area sends, and determines to leave the eNB of SFN area.

Step 1503:MCE sends de-registration request message to mUPE, and request is deleted the eNB that needs leave SFN area from the content distribution tree, and sends contraction indication request message to this eNB, notifies it to stop the transmission of MBMS business.

Step 1504:MCE further sends the resource coordination Indication message to the eNB that partly or entirely leaves, and makes its restriction use frequency band or the subcarrier identical with described SFN area.

Message relevant with resource coordination and contraction indication request message can be a piece of news.

Referring to Figure 16, the concrete grammar flow process that the result that MCE adds up according to each eNB in the present embodiment dynamically shrinks SFN area is as follows:

The eNB of step 1601:MCE in SFN area sends the message that has the statistics instruction, requires to have registered in the eNB statistics overlay area UE quantity of MBMS business.

Step 1602:eNB carries out statistical operation after receiving the statistics instruction, and returns statistics to MCE.

It is 0 o'clock that step 1603:MCE finds to be in the statistics that eNB returns, and SFN area is shunk in decision.

It is whether the statistics that whole neighboring edge eNB of 0 eNB return is 0 that step 1604:MCE further determines to return statistics, and in judged result when being, determine that at least this eNB need leave SFN area.

Step 1605:MCE sends the message that has SFN area location status information to the eNB that becomes the edge from non-edge, notifies it to be in SFN area edge.

Perhaps skip this step, eNB goes out oneself to be in SFN area edge by being adjacent the eNB interaction analysis.

The information updating of step 1606:SFN area location status is that the eNB at edge sends rim condition information by control channel has begun to register the MBMS business in coverage UE, perhaps send the SFN area relevant information of adjacent eNB, UE is known oneself be in SFN area edge.

Step 1607:MCE sends contraction indication request message to the eNB that needs leave SFN area, perhaps further leaves the eNB transmission resource coordination Indication message of SFN area to part or all of needs.

Perhaps, MCE sends to the eNB that is adjacent and need leaves SFN area by Indication message indication edge eNB and shrinks indication request message, perhaps sends the resource coordination Indication message to it, or triggers the ICIC process.This Indication message comprises the sign of the eNB that need leave SFN area.

Step 1608:MCE sends releasing resource coordination message to the eNB that needs leave guard area, makes the restriction of its releasing to the Radio Resource identical with SFN area.

Step 1609: the eNB that receives each message sends corresponding response message to MCE.

Step 1610:MCE sends de-registration request message to mUPE, and request is deleted the eNB that needs leave SFN area from the content distribution tree, and the carrying of the data surface of cancellation and mUPE.Continue step 1611.

Perhaps, receive that the eNB that shrinks indication request message sends de-registration request message to mUPE, the content distribution tree is left in request, and the carrying of the data surface of cancellation and mUPE.

Perhaps, described non-edge eNB sends de-registration request message according to the indication of MCE to mUPE, and request will receive that the eNB that shrinks indication request message deletes from the content distribution tree, and the carrying of the data surface of cancellation and mUPE.

Above-mentioned steps 1607 to 1611 does not have strict sequencing.

Referring to Figure 17, the concrete grammar flow process that the area update message that comprises source MBMS radio resource utilization entity that MCE carries out sending after MBMS radio resource utilization entity switches according to UE in the present embodiment is dynamically shunk SFN area is as follows:

Step 1701: the UE that finishes sub-district gravity treatment or cell update sends cell update message to eNB, for example, referring to shown in Figure 180, UE moves to eNB-6 from eNB-1, UE sends cell update message to eNB-6, and this cell update message comprises the sign of eNB-1 and the sign of eNB-6.

The UE and the interactive information between the MCE that are in state of activation can merge with other upstream or downstream message.

Step 1702:eNB-6 gives MCE with the cell update forwards.

Step 1703:MCE compares the sign of source eNB and the sign of target eNB, if comparative result unanimity, process ends then, otherwise, sign according to the source eNB in the cell update message (being eNB-1), the registration of the eNB-1 correspondence that will have the UE quantity of MBMS business subtract 1, and according to the sign of the target eNB in the cell update message (being eNB-6), the registration of the eNB-6 correspondence that will have the UE quantity of MBMS business add 1.

Step 1704:MCE judges whether the quantity obtain is 0, if be not 0, and process ends then, otherwise, detect further in the adjacent eNB of eNB-1 whether edge eNB is arranged, if having, then continue step 1705, otherwise process ends.Wherein, eNB-6 may become non-edge from the edge.

Step 1705:MCE sends the message that has SFN area location status information to eNB-1, notifies it to be in SFN area edge.

Perhaps skip this step, eNB-1 goes out oneself and has been in the SFNarea edge by being adjacent the eNB interaction analysis.

Step 1706:eNB-1 sends rim condition information by control channel has begun to register the MBMS business in coverage UE, perhaps sends the SFN area relevant information of adjacent eNB, UE is known oneself be in SFN area edge.

Step 1707: the eNB-1 that receives the message that has SFN area location status information returns response message to MCE.

Step 1708:MCE sends to edge eNB (being eNB-18, eNB-2 and eNB-16) and shrinks indication request message, make it stop the professional transmission of MBMS, perhaps further send the resource coordination Indication message, make its restriction or ban use of the Radio Resource identical with SFN area.MCE is by whether nothing but judging in its whole adjacent eNB of eNB at edge edge eNB, if then definite its need leave SFNarea.

Perhaps, MCE sends releasing radio-resource-configuration message by message (perhaps sending Indication message once more) the indication eNB-1 that has SFN area location status information to eNB-18, eNB-2 and eNB-16, perhaps further sends the resource coordination Indication message or is used for the ICIC that SFN transmits.This message that has SFNarea location status information comprises the sign of eNB-18, eNB-2 and eNB-16.

Step 1709: receive that eNB-18, the eNB-2 and the eNB-16 that shrink indication request message return contraction indication response message to MCE.

Step 1710:MCE sends releasing resource coordination message to the eNB (being eNB-36, eNB-35, eNB-3, eNB-33 and eNB-32) that needs leave guard area, notifies it can stop limiting or banning use of the Radio Resource identical with SFN area.

Step 1711: receive that eNB-36, the eNB-35, eNB-3, eNB-33 and the eNB-32 that remove resource coordination message return response message to MCE.

Step 1712:MCE sends de-registration request message to mUPE, and request is deleted eNB-18, eNB-2 and eNB-16 from the content distribution tree, and the carrying of the data surface of cancellation and mUPE.

Perhaps, eNB-18, eNB-2 and eNB-16 send de-registration request message to mUPE, and the content distribution tree is left in request, and the carrying of the data surface of cancellation and mUPE.

Perhaps, eNB-1 sends de-registration request message according to the indication of MCE to mUPE, and request is deleted eNB-18, eNB-2 and eNB-16 from the content distribution tree, and the carrying of the data surface of cancellation and mUPE.

Referring to Figure 19, MCE leaves request message or nullify the MBMS business request information according to what UE initiatively sent that dynamically to shrink the concrete grammar flow process of SFN area as follows in the present embodiment:

Step 1901:UE sends to eNB (being the eNB-1 among Figure 18) and leaves request message or nullify the MBMS business request information.

Step 1902:eNB-1 will leave request message or nullify the MBMS business request information and be transmitted to MCE.

Step 1903:MCE leave request message according to this or nullify the MBMS business request information with the registration of eNB-1 correspondence the UE quantity of MBMS business subtract 1.

Step 1904:MCE judges whether the quantity that obtains is 0, if be not 0, process ends then, otherwise, detect further in the adjacent eNB of eNB-1 whether edge eNB is arranged, if have, then continue step 1905, otherwise, the message that has SFN area location status information sent to eNB-1, notify it to be in the SFNarea edge, perhaps direct termination process.

Step 1905:MCE sends the message that has SFN area location status information to eNB-1, notifies it to be in SFN area edge.

Step 1906:eNB-1 sends rim condition information by control channel has begun to register the MBMS business in coverage UE, perhaps sends the SFN area relevant information of adjacent eNB, UE is known oneself be in SFN area edge.

Step 1907: the eNB-1 that receives the message that has SFN area location status information returns response message to MCE.

Step 1908:MCE sends to edge eNB (being eNB-18, eNB-2 and eNB-16) and shrinks indication request message, make it stop the professional transmission of MBMS, perhaps further send the resource coordination Indication message, make its restriction or ban use of the Radio Resource identical with SFN area.

Perhaps, MCE sends releasing radio-resource-configuration message by the message indication eNB-1 that has SFN area location status information to eNB-18, eNB-2 and eNB-16, perhaps further sends the resource coordination Indication message or is used for the ICIC that SFN transmits.This message that has SFN area location status information comprises the sign of eNB-18, eNB-2 and eNB-16.

Step 1909: receive that eNB-18, the eNB-2 and the eNB-16 that shrink indication request message return contraction indication response message to MCE.

Step 1910:MCE sends releasing resource coordination message to the eNB (being eNB-36, eNB-35, eNB-3, eNB-33 and eNB-32) that needs leave guard area, notifies it can stop limiting or banning use of the Radio Resource identical with SFN area.

Step 1911: receive that eNB-36, the eNB-35, eNB-3, eNB-33 and the eNB-32 that remove resource coordination message return response message to MCE.

Step 1912:MCE sends de-registration request message to mUPE, and request is deleted eNB-18, eNB-2 and eNB-16 from the content distribution tree, and the carrying of the data surface of cancellation and mUPE.

The foregoing description is to be that example describes with the corresponding sub-district of eNB, expansion and the granularity of shrinking promptly be cell-level also be the eNB level.ENB also can corresponding a plurality of sub-districts, and when expansion or the granularity of shrinking are the eNB level, i.e. expansion or when shrinking all sub-districts in the eNB coverage is set up, expansion or shrink the method that the method for SFN area is introduced with above-mentioned embodiment.

Basic skills when the granularity of introducing expansion below or shrinking is cell-level.MCE have a plurality of sub-districts of each eNB correspondence sign, each sub-district correspondence registration the UE quantity of MBMS business and SFN area location status information etc.ENB have a plurality of sub-districts in the coverage sign, each sub-district correspondence registration the UE quantity of MBMS business and SFN area location status information etc.MCE according to the registration of each sub-district correspondence the UE quantity decision of MBMS business set up, expansion and shrink SFN area.

Under the situation of setting up SFN area, eNB after carrying out statistical operation, with the registration of each sub-district correspondence the UE quantity of MBMS business send to MCE.MCE is known when the UE of MBMS business has been registered in existence in the sub-district, just the eNB to this sub-district correspondence sends information of radio resource allocation, mUPE adds the content distribution tree with this eNB with request, but only this sub-district is added SFN area, perhaps further its neighbor cell is also added SFN area.

Under the situation of expansion SFN area, MCE know registration that edge cell reports the UE quantity of MBMS business greater than 0 o'clock decision expansion SFN area, decision expansion SFN area when perhaps receiving extended request message or the cell update message that the UE that is in edge cell sends or receiving the extended request message that the eNB that edge cell should be arranged is sent.MCE will add SFN area with the adjacent of edge cell and the part or all of sub-district that is in SFN area outside, and to corresponding eNB transmission information of radio resource allocation, when if this eNB corresponding district all is in SFN area outside before expansion SFN area, further request mUPE adds the content distribution tree with this eNB, perhaps indicates eNB to add the content distribution tree to the mUPE request.

The UE that the eNB that edge cell should be arranged is begun in edge cell sends rim condition information.UE sends extended request message when laying oneself open to edge cell knowing, same, eNB at least one sub-district in knowing coverage is to send extended request message when having the UE that has registered the MBMS business in edge cell and the edge cell, the sign that can comprise neighbor cell in this extended request message perhaps further comprises the sign of the eNB of neighbor cell ownership.MCE only need expand the sub-district adjacent with edge cell.Wherein, the eNB of ownership can carry out alternately with adjacent eNB, thereby directly obtains the sign of adjacent eNB, and UE can know whether neighbor cell belongs to adjacent eNB and obtain the sign of adjacent eNB by the eNB of ownership.

After UE carries out sub-district gravity treatment or sub-district switching, send cell update message, MCE can subtract 1 and add 1 with the pairing UE quantity of having registered the MBMS business in corresponding sub-district according to the cell-of-origin in cell update message sign and Target Cell Identifier, according to the UE quantity decision expansion or the contraction SFN area of each the sub-district correspondence after upgrading.

Under the situation of shrinking SFN area, MCE find each sub-district correspondence in the SFN area of eNB statistics registration the UE quantity of MBMS business exist for 0 as a result the time, SFN area is shunk in decision, and determines that according to the UE quantity of each sub-district correspondence needs leave the sub-district of SFN area.Perhaps, MCE subtracts 1 and add 1 according to the cell update message received with the pairing UE quantity of having registered the MBMS business in corresponding sub-district, and the quantity after obtaining upgrading, determine that according to the UE quantity of each sub-district correspondence needs leave the sub-district of SFNarea, and after further determining to leave in the pairing eNB coverage in sub-district of SFN area all and all leaving SFN area zone, this eNB is deleted from the content distribution tree.

ENB can limit or forbid the use of the Radio Resource of part sub-district simultaneously to part cell transmission MBMS business, can save Internet resources and minimizing or avoid co-channel interference.

By the MCE decision of concrete management MBMS business and foundation, expansion and the contraction of control SFN area, help the unified management and the distribution of SFN area Radio Resource in the present embodiment.Present embodiment provides the method for multiple dynamic or semi-static expansion SFN area, guarantees the continuity of UE MBMS business when mobile, and the method for the expansion SFN area that has ready conditions is provided, at the successional Internet resources of saving simultaneously that guarantee the MBMS business.Present embodiment also provides the method for multiple dynamic or semi-static contraction SFN area, can save Internet resources.Simultaneously, present embodiment provides various configurations guard the method for area, and the co-channel interference of minimizing and SFNarea improves the MBMS service transmission quality.And present embodiment provides the method for multiple foundation and configuration SFN area, realizes the flexible configuration of SFN area.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. a method of expanding single-frequency network area is characterized in that, may further comprise the steps:

The message that multicast coordination entity MCE receiving multimedia broadcast and multicast services MBMS radio resource utilization entity send; Wherein, the MBMS radio resource utilization entity that sends described message is the MBMS radio resource utilization entity that is in the single-frequency network area edge;

Send information of radio resource allocation to the described MBMS radio resource utilization entity that needs to add single-frequency network area.

2. the method for claim 1, it is characterized in that described message is: the MBMS radio resource utilization entity at described edge initiatively or according to the indication statistics of described MCE has been registered first message that comprises the UE quantity of having registered the MBMS business that sends after the user equipment (UE) quantity of MBMS business;

Perhaps described message is: the MBMS radio resource utilization entity at described edge initiatively or according to the indication of described MCE after statistics has been registered the UE quantity of MBMS business and has been found that this quantity is greater than 0, second message that is used to ask to expand single-frequency network area that sends, perhaps the MBMS radio resource utilization entity at described edge is transmitted second message that UE sends;

Perhaps described message is: the MBMS radio resource utilization entity at described edge is transmitted the message that is used to report measurement result that UE sends;

Perhaps described message is: the MBMS radio resource utilization entity at described edge is transmitted the 3rd message that is used to report area update that UE sends.

3. method as claimed in claim 2 is characterized in that, when UE is known the MBMS radio resource utilization entity that self belongs to the edge, sends described second message; Perhaps

After UE measures neighbor cell, send the described message that is used to report measurement result, perhaps neighbor cell is measured and sent described second message when there is the adjacent MBMS radio resource utilization entity of coincidence measurement condition in concurrent present described single-frequency network area outside.

4. method as claimed in claim 3, it is characterized in that, UE obtains the single-frequency network area location status information of the MBMS radio resource utilization entity transmission at described edge by monitoring control channel, thereby knows that it belongs to the MBMS radio resource utilization entity at edge; Perhaps

UE obtains the single-frequency network area relevant information of adjacent MBMS radio resource utilization entity by monitoring control channel, thereby analyzes the MBMS radio resource utilization entity that it belongs to the edge.

5. method as claimed in claim 2 is characterized in that, when the MBMS radio resource utilization entity at described edge is received second message of described UE transmission, judges whether to exist the 2nd UE to send second message;

When judged result when being, the MBMS radio resource utilization entity at described edge compares two second message, if comparative result unanimity, then the MBMS radio resource utilization entity at described edge is not temporarily transmitted second message that described UE sends, if comparative result is inconsistent, then transmit second message that described UE sends;

When judged result for not the time, the MBMS radio resource utilization entity at described edge is transmitted second message that described UE sends.

6. method as claimed in claim 2 is characterized in that, when the MBMS radio resource utilization entity at described edge sends described second message, the single-frequency network area location status of this entity is updated to non-rim condition, and stops to send rim condition information to UE; Perhaps

After the MBMS radio resource utilization entity at described edge sends described second message and receives the response message that described MCE sends, the single-frequency network area location status of this entity is updated to non-rim condition, and stops to send rim condition information to UE.

7. method as claimed in claim 2, it is characterized in that, when described MCE will determine need to add the MBMS radio resource utilization entity of single-frequency network area, select MBMS radio resource utilization entity with described edge adjacent and be in the part or all of MBMS radio resource utilization entity of single-frequency network area outside.

8. method as claimed in claim 2 is characterized in that, when described second message comprised the sign of MBMS radio resource utilization entity, described MCE selected the corresponding MBMS radio resource utilization entity of described sign at least.

9. method as claimed in claim 2 is characterized in that, described MCE selects to be in the outside also MBMS radio resource utilization entity of coincidence measurement condition of described single-frequency network area at least according to the described message of receiving that is used to report measurement result.

10. the method for claim 1, it is characterized in that, the MBMS radio resource utilization entity that sends described message is the MBMS radio resource utilization entity that is in the outer peripheral areas of described single-frequency network area, and described message is that the MBMS radio resource utilization entity of described outer peripheral areas is transmitted the message that is used to register the MBMS business that UE sends; And described MCE selects the MBMS radio resource utilization entity of this outer peripheral areas to add described single-frequency network area at least.

11. method as claimed in claim 10, it is characterized in that described MCE further selects to be in described single-frequency network area outside and the part or all of MBMS radio resource utilization entity adjacent with the MBMS radio resource utilization entity of described outer peripheral areas adds described single-frequency network area.

12. as each described method in the claim 7 to 11, it is characterized in that, described MCE judges that whether the MBMS radio resource utilization entity of selecting meets preset condition, determines that the MBMS radio resource utilization entity that meets preset condition adds described single-frequency network area.

13. method as claimed in claim 12, it is characterized in that the MBMS radio resource utilization entity that meets preset condition comprises: the MBMS radio resource utilization entity in maximum single-frequency network area, load less than the MBMS radio resource utilization entity of default threshold value, belong to and allow to add the MBMS radio resource utilization entity of single-frequency network area in the local configuration information and do not belong to one or more in the MBMS radio resource utilization entity of forbidding adding single-frequency network area in the local configuration information.

14. method as claimed in claim 13 is characterized in that, described MCE directly monitors the load of MBMS radio resource utilization entity; Perhaps

Described MCE obtains the load information of MBMS radio resource utilization entity by the monitoring entity; Perhaps

Described MCE is by obtaining its load information with MBMS radio resource utilization entity interaction.

15., it is characterized in that described MCE directly adds the MBMS radio resource utilization entity transmission information of radio resource allocation in single-frequency zone to needs as each described method in the claim 1 to 11; Perhaps

When the MBMS radio resource utilization entity that is in the single-frequency network area edge sent described message, described MCE indicated the MBMS radio resource utilization entity at described edge to send information of radio resource allocation to the MBMS radio resource utilization entity that needs add single-frequency network area.

16. method as claimed in claim 15 is characterized in that, described MCE directly notifies the MBMS radio resource utilization entity that needs to add the single-frequency zone to be in described single-frequency network area edge; Perhaps

The MBMS radio resource utilization entity that described MCE adds the single-frequency zone to needs sends the single-frequency network area relevant information of the MBMS radio resource utilization entity that is adjacent, and the MBMS radio resource utilization entity that needs to add the single-frequency zone knows that according to the single-frequency network area relevant information that receives this entity has been in described single-frequency network area edge.

17. method as claimed in claim 15 is characterized in that, receives that the MBMS radio resource utilization entity of information of radio resource allocation adds the content distribution tree to the upstream node request of MBMS radio resource utilization entity; Perhaps

When the MBMS radio resource utilization entity at edge sent described message, the MBMS radio resource utilization entity that described MCE indicates the upstream node of the MBMS radio resource utilization entity requests MBMS radio resource utilization entity at described edge will need to add the single-frequency zone added the content distribution tree; Perhaps

The MBMS radio resource utilization entity that described MCE directly asks the upstream node of MBMS radio resource utilization entity will need to add the single-frequency zone adds the content distribution tree.

18. the method for claim 1, it is characterized in that, described MCE adds MBMS radio resource utilization entity adjacent in single-frequency zone and is in MBMS radio resource utilization entity from described single-frequency network area outside to needs sends the 4th message that is used for resource coordination, limits it and uses the Radio Resource identical with described single-frequency network area; Perhaps

The MBMS radio resource utilization entity that described MCE indication needs to add the single-frequency zone sends the 4th message that is used for resource coordination to the MBMS radio resource utilization entity that is adjacent and be in described single-frequency network area outside, limits it and uses the Radio Resource identical with described single-frequency network area; Perhaps

Described MCE indication needs to add the MBMS radio resource utilization entity triggers Inter-Cell Interference Coordination process ICIC in single-frequency zone, and restriction is adjacent and is in the MBMS radio resource utilization entity use Radio Resource identical with described single-frequency network area of described single-frequency network area outside.

19. the method for claim 1 is characterized in that, described information of radio resource allocation comprises subcarrier information and/or frequency band.

20. the method for claim 1, it is characterized in that, further send one or more in the upstream node information of transmission mode, APN APN, interim multicast identifier TMGI, session identification SessionID, MBMS data source address information and MBMS radio resource utilization entity of service identifiers, single-frequency network area sign, modulation coding mode, SFN to the MBMS radio resource utilization entity that needs add the single-frequency zone.

21. a method of shrinking single-frequency network area is characterized in that, may further comprise the steps:

Multicast coordination entity MCE receives the message of the MBMS radio resource utilization entity transmission that is in single-frequency network area inside;

22. method as claimed in claim 21, it is characterized in that described message is: the MBMS radio resource utilization entity of described inside initiatively or according to the indication statistics of described MCE has been registered first message that comprises the UE quantity of having registered the MBMS business that sends after the user equipment (UE) quantity of MBMS business;

Perhaps described message is: the MBMS radio resource utilization entity of described inside is transmitted the 3rd message that is used to report area update that UE sends, and the 3rd message comprises the sign of source MBMS radio resource utilization entity and the sign of target MBMS radio resource utilization entity; Described MCE is according to the sign of described source MBMS radio resource utilization entity, with the registration of its correspondence the UE quantity of MBMS business subtract 1, and according to the sign of described target MBMS radio resource utilization entity, with the registration of its correspondence the UE quantity of MBMS business add 1, the quantity after obtaining upgrading;

Perhaps described message is: the MBMS radio resource utilization entity of described inside transmits that UE sends is used to report the message left or for being used to nullify the message of MBMS business; Described MCE is according to the described message that is used to report the message of leaving or is used to nullify the MBMS business, with send described message MBMS radio resource utilization entity correspondence registration the UE quantity of MBMS business subtract 1, the quantity after obtaining upgrading.

23. method as claimed in claim 22 is characterized in that, described MCE find to be in single-frequency network area inside MBMS radio resource utilization entity correspondence registration the UE quantity of MBMS business be 0 o'clock, described single-frequency network area is shunk in decision.

24. method as claimed in claim 23 is characterized in that, described MCE according to the registration of MBMS radio resource utilization entity correspondence the UE quantity of MBMS business determine that needs leave the MBMS radio resource utilization entity of single-frequency network area.

25. method as claimed in claim 24, it is characterized in that, described MCE find MBMS radio resource utilization entity and adjacent MBMS radio resource utilization entity correspondence thereof registration the UE quantity of MBMS business be 0 o'clock, determine that at least this MBMS radio resource utilization entity need leave single-frequency network area.

26. method as claimed in claim 23 is characterized in that, described MCE sends rim condition information to the MBMS radio resource utilization entity that need become the edge from non-edge; Perhaps

The MBMS radio resource utilization entity at non-edge obtains the single-frequency network area relevant information of its adjacent MBMS radio resource utilization entity by described MCE, perhaps by being adjacent the single-frequency network area relevant information that MBMS radio resource utilization entity obtains its adjacent MBMS radio resource utilization entity alternately, and analyze this entity by this single-frequency network area relevant information and be in described single-frequency network area edge, the single-frequency network area location status is updated to rim condition.

27. method as claimed in claim 26 is characterized in that, after the MBMS radio resource utilization entity at described non-edge is updated to rim condition with the single-frequency network area location status, sends rim condition information by control channel.

28. method as claimed in claim 26 is characterized in that, described MCE sends the 4th message that is used for resource coordination to the MBMS radio resource utilization entity that needs add outer peripheral areas, limits it and uses the frequency band identical with described single-frequency network area; Perhaps

The MBMS radio resource utilization entity that described MCE indication is described to become the edge sends the 4th message that is used for resource coordination to the MBMS radio resource utilization entity that is adjacent and be in described single-frequency network area outside, makes its restriction use the Radio Resource identical with described single-frequency network area; Perhaps

The described MBMS radio resource utilization entity triggers Inter-Cell Interference Coordination process ICIC that becomes the edge of described MCE indication, restriction is adjacent and is in the MBMS radio resource utilization entity use Radio Resource identical with described single-frequency network area of described single-frequency network area outside.

29., it is characterized in that the upstream node of described MCE request MBMS radio resource utilization entity leaves the content distribution tree with the MBMS radio resource utilization entity that needs leave single-frequency network area as each described method in the claim 21 to 28; Perhaps

Receive that the described MBMS radio resource utilization entity that is used to remove the message of allocation of radio resources leaves the content distribution tree to the upstream node request of MBMS radio resource utilization entity; Perhaps

The upstream node of described MCE indication MBMS radio resource utilization entity requests MBMS radio resource utilization entity leaves the content distribution tree with the MBMS radio resource utilization entity that needs leave single-frequency network area.

30. as each described method in the claim 21 to 28, it is characterized in that, described MCE sends the message be used to remove resource coordination to the MBMS radio resource utilization entity that needs leave outer peripheral areas and are in the single-frequency network area outside, notifies it to remove restriction to the Radio Resource identical with single-frequency network area.

31. the method for a configuring single-frequency network area is characterized in that, may further comprise the steps:

Multicast coordination entity MCE is according to single-frequency network area configuration information decision expansion, and definite MBMS radio resource utilization entity that needs to add single-frequency network area; And

Multicast coordination entity MCE is according to single-frequency network area configuration information decision contraction single-frequency network area, and definite MBMS radio resource utilization entity that need leave single-frequency network area; And

32. method as claimed in claim 31, it is characterized in that, described single-frequency network area configuration information comprise time parameter and corresponding with time parameter comprise needs add single-frequency network area MBMS radio resource utilization entity identification tabulation and/or need leave the tabulation of the MBMS radio resource utilization entity identification of single-frequency network area.

33., it is characterized in that the upstream node of described MCE request MBMS radio resource utilization entity adds the content distribution tree with the described MBMS radio resource utilization entity that needs to add single-frequency network area as claim 31 or 32 described methods; The perhaps described MBMS radio resource utilization entity that needs to add single-frequency network area adds the content distribution tree to the upstream node request of MBMS radio resource utilization entity; And/or

The upstream node of described MCE request MBMS radio resource utilization entity is deleted the MBMS radio resource utilization entity that described needs leave single-frequency network area from the content distribution tree; The upstream node that perhaps described needs leave the MBMS radio resource utilization entity requests MBMS radio resource utilization entity of single-frequency network area leaves the content distribution tree.

34. a method of setting up single-frequency network area is characterized in that, may further comprise the steps:

Multicast coordination entity MCE receives first message that comprises the user equipment (UE) quantity of having registered the MBMS business that MBMS radio resource utilization entity sends;

35. method as claimed in claim 34 is characterized in that, described MBMS radio resource utilization entity sends described first message in the UE number of messages of having registered the MBMS business that is used to add up that receives the MCE transmission; Perhaps

Described MBMS radio resource utilization entity sends described first message after adding up the UE quantity of having registered the MBMS business.

36. as claim 34 or 35 described methods, it is characterized in that, after the MBMS radio resource utilization entity of needs adding single-frequency network area was received information of radio resource allocation, the part or all of sub-district that needs is added the MBMS radio resource utilization entity correspondence of single-frequency network area added single-frequency network area.

37. a method of expanding single-frequency network area is characterized in that, may further comprise the steps:

38. method as claimed in claim 37 is characterized in that, if receive that the MBMS radio resource utilization entity of information of radio resource allocation does not add the content distribution tree, then further it is added the content distribution tree.

39. method as claimed in claim 37 is characterized in that, the MBMS radio resource utilization entity that sends described message is the sub-district pairing MBMS radio resource utilization entity that is in the single-frequency network area edge.

40. method as claimed in claim 39, it is characterized in that described message is: described MBMS radio resource utilization entity initiatively or add up according to the indication of described MCE in the sub-district at described edge and registered first message that comprises the UE quantity of having registered the MBMS business that sends after the user equipment (UE) quantity of MBMS business;

Perhaps described message is: after described MBMS radio resource utilization entity has been registered the UE quantity of MBMS business and found that this quantity is greater than 0 in the sub-district at the described edge of statistics initiatively or according to the indication of described MCE, second message that is used to ask to expand single-frequency network area that sends, perhaps described MBMS radio resource utilization entity is transmitted second message that UE sends;

Perhaps described message is: described MBMS radio resource utilization entity is transmitted the message that is used to report measurement result that UE sends;

Perhaps described message is: described MBMS radio resource utilization entity is transmitted the 3rd message that is used for the reporting cell renewal that UE sends.

41. method as claimed in claim 37 is characterized in that, described MCE will be adjacent with the sub-district at described edge and the part or all of sub-district that is in the single-frequency network area outside be defined as needing to add the sub-district of single-frequency network area.

42. method as claimed in claim 37 is characterized in that, the UE in the extrorse sub-district of MBMS radio resource utilization entity of corresponding marginate sub-district sends the marginal position state information.

43. a method of shrinking single-frequency network area is characterized in that, may further comprise the steps:

44. method as claimed in claim 43, it is characterized in that, divide the whole sub-districts in the MBMS radio resource utilization entity coverage to leave single-frequency network area if receive the message that is used to remove allocation of radio resources, then this MBMS radio resource utilization entity is deleted from the content distribution tree.

45. method as claimed in claim 43, it is characterized in that described message is: described MBMS radio resource utilization entity is initiatively or according in the indication statistics coverage of described MCE and be in the sub-district in the single-frequency network area and registered first message that comprises the UE quantity of having registered the MBMS business that sends after the user equipment (UE) quantity of MBMS business;

Perhaps described message is: described MBMS radio resource utilization entity is transmitted the 3rd message that is used for the reporting cell renewal that UE sends, and the 3rd message comprises the sign of cell-of-origin and the sign of Target cell; Described MCE is according to the sign of described cell-of-origin, with the registration of its correspondence the UE quantity of MBMS business subtract 1, and according to the sign of described Target cell, with the registration of its correspondence the UE quantity of MBMS business add 1, the quantity after obtaining upgrading;

Perhaps described message is: described MBMS radio resource utilization entity transmits that UE sends is used to report the message left or for being used to nullify the message of MBMS business; Described MCE will subtract 1, the quantity after obtaining upgrading corresponding to the pairing UE quantity of having registered the MBMS business in described message sub-district according to the described message that is used to report the message of leaving or is used to nullify the MBMS business.

46. method as claimed in claim 43 is characterized in that, described MCE find to be in single-frequency network area inside the sub-district correspondence registration the UE quantity of MBMS business be 0 o'clock, described single-frequency network area is shunk in decision.

47. method as claimed in claim 46 is characterized in that, described MCE according to the registration of sub-district correspondence the UE quantity of MBMS business determine that needs leave the sub-district of single-frequency network area.

48. a multicast coordination entity MCE is characterized in that, comprising:

49. a communication system is characterized in that, comprising: