CN1836387B

CN1836387B - Method for re-selecting a cell for receiving packet data in a mobile communication system providing a multimedia broadcast/multicast service

Info

Publication number: CN1836387B
Application number: CN2004800234831A
Authority: CN
Inventors: 郑景仁; 李国熙; 金成勋; 崔成豪; 格特·J·范利肖特
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2003-08-22
Filing date: 2004-08-20
Publication date: 2010-11-17
Anticipated expiration: 2024-08-20
Also published as: ZA200602346B; CN1836387A

Abstract

A method for selecting a cell by a user equipment (UE) to receive a Multimedia Broadcast/Multicast Service (MBMS) service in a mobile communication system which supports the MBMS service with different frequency allocations (FAs) in the same area. In the method, a radio network controller (RNC) transmits information on an MBMS cell to the UE, and the MBMS cell information includes an MBMS offset for guaranteeing priority for cell reselection to the MBMS cell. The UE performs cell reselection using the MBMS cell information and receives the MBMS service from the reselected cell.

Description

Be used for residence reselecting at the mobile communication system receiving block data of supporting multimedia broadcast/group broadcast service

Technical field

The present invention relates generally to Packet data service, and more specifically, relate to a kind of method, be used for when sub-district that Packet data service can be used and the disabled sub-district of Packet data service are overlapping, with relevant specific cluster data service can with the information of sub-district send to subscriber equipment (UE), provide Packet data service to UE thus.

Background technology

The figure of the configuration of general mobile communication system that Fig. 1 is an indicative icon.With reference to figure 1, this mobile communication system-be Universal Mobile Telecommunications System (UMTS) mobile communication system-comprise core net (CN) 100, a plurality of radio network sub-system (RNS) 110 and 120 and subscriber equipment (UE) 130.Among the RNS110 and 120 each comprises radio network controller (RNC) 111 and 112 and a plurality of Node B 113-116 (being the base station).For example, RNS 110 comprises RNC111 and Node B 113 and 115, and RNS 120 comprises RNC 112 and Node B 114 and 116.

RNC 111 and 112 operations according to them are classified as professional RNC (SRNC), Drift Radio Network Controller (DRNC) and control RNC (CRNC).This SRNC is the information of relevant each UE of management and controls and the RNC of the exchanges data of CN 100.When via specific RNC to/when SRNC sent and receive the data of UE, this DRNC was this specific RNC.This CRNC is the RNC of each Node B of control.

For example, in Fig. 1, if the information of relevant UE 130 is managed by RNC 111, then RNC 111 is as the SRNC of UE 130, if and because the mobile data of UE 130 that make of UE 130 send and receive via RNC112, then this RNC 112 becomes the DRNC of UE 130.In addition, the RNC 111 of control and UE 130 nodes in communication B 113 becomes the CRNC of Node B 113.

In Fig. 1, RNC 111 and 112 is connected to their Node B 113 to 116 via Iub interface, and RNC 111 is connected to RNC 112 via the Iur interface.Although do not illustrate among Fig. 1, UE 130 is connected to UMTS terrestrial radio Access Network (UTRAN) via the Uu interface.

RNC is a plurality of their Node B assigning radio resources, and each Node B will offer UE from the radio resource that RNC assigns.Based on sub-district one by one and radio resource is provided.The radio resource that Node B provides is the radio resource that is used for the specific cell that Node B manages.UE utilizes the radio resource of the specific cell that Node B manages and sets up radio channel, and utilizes the radio channel of being set up and send/receive data.Therefore, because UE only is designated each physical channel that each sub-district forms separately, so the differentiation between Node B and the sub-district is meaningless and there is no need.Here, term " Node B " and " sub-district " are used interchangeably.

In order to support multicast/multimedia communication, broadcasting/packet service is provided, one of them data source provides specific transactions for a plurality of UE.Broadcasting/packet service can be divided into the multimedia broadcast/group broadcast service (MBMS) of the cell broadcaste service (CBS) of supporting message based business and support realtime graphic and voice, rest image, text data etc.

Fig. 2 is an indicative icon is used for providing in mobile communication system the figure of the network configuration of MBMS business.With reference to figure 2, broadcast/group broadcast-service centre (BM-SC) 210 provides the source of MBMS data flow, and BM-SC 210 scheduling MBMS data flow, and the MSMS data flow of being dispatched is delivered to transit network (NW) 220.Transit network 220 is present between BM-SC 210 and service GPRS (general packet radio service) support node (SGSN) 230, and will be delivered to SGSN 230 from the MBMS data flow that BM-SC 210 provides.SGSN 230 can comprise Gateway GPRS Support Node (GGSN) and extranets.The SGSN 230 that receives the MBMS data flow from transit network 220 receives the user or the UE control business relevant with MBMS of MBMS business for expectation, promptly the control business relevant with MBMS for example is used for the business that management is adjusted the business of (accounting) relevant data with MBMS and is used for optionally sending to specific RNC 240 the MBMS data.In addition, SGSN 230 disposes and manages the SGSN business contexts of MBMS business X, and this MBMS data flow is delivered to RNC 240.

RNC 240 controls a plurality of Node B, and the MBMS data is sent to the Node B that UE was positioned at of the request MBMS business between its each Node B.In addition, RNC 240 control is used to provide the radio channel of MBMS business to set up process, and the MBMS data flow that provides from SGSN 230 is provided and is disposed and manage the RNC business contexts that is used for the professional X of MBMS.

Here suppose the sub-district that Node B 1 (or sub-district 1) 260 is positioned at corresponding to UE1 261, UE2 262 and UE3 263, and the sub-district that Node B 2 (or sub-district 2) 270 is positioned at corresponding to UE4 271 and UE5 272, and between Node B 1 260 and UE 261 to 263, set up a radio channel so that MBMS to be provided business.

Although do not illustrate among Fig. 2, Home Location Register (HLR) links to each other with SGSN 230, and carries out the user rs authentication that is used for the MBMS business.

To the operation of carrying out between the node that support the MBMS business be described now.Fig. 3 illustrates the message flow chart that is used for carrying out the process of MBMS business between the UE of RNC and expectation reception MBMS business.

This process comprises that 4 are handled continuously: (Radio Bear RB) sets up processing for declaration, adding, notice, radio bearer.This 4 processing will be described below.In these were handled, RNC provided MBMS business via Node B to the UE of request MBMS business.Although Node B is not shown among Fig. 3, it is conspicuous to those skilled in the art that the MBMS business is provided via Node B.And, will be to being described for the professional MBMS control messages that sends of MBMS.

With reference to figure 3, handle the essential information that SGSN 304 announces about specific MBMS business to particular UE 300, for example MBMS task identifier (ID) by the declaration in the step 331, with the information of relevant MBMS availability of traffics, i.e. the start time information of MBMS business and duration information.

If by the professional definite MBMS business that has expectation of processing of announcing of MBMS, then the adding in UE 300 execution in step 341 is handled, so that the MBMS service request is issued to SGSN 304.

In the adding of step 341 was handled, UE 300 message that will join request sent to SGSN 304.This message that joins request comprises: the identification code of the specific MBMS business that UE 300 expectation receives in the MBMS service lists that SGSN 304 is sent and expect the UE ID of the UE of this MBMS business.Whether SGSN304 carries out checking to the UE 300 that asks this MBMS business then, and notify this MBMS business available as the checking result to UE300.In addition, SGSN 304 stores the tabulation of the UE that expects the specific MBMS business of reception and the positional information of UE therein.

Thereafter, if received the message of the beginning that shows the MBMS business from BM-SC, then in step 351, SGSN 304 begins the RNC 302 that message sends to the sub-district that control UE 300 is positioned at session.

In step 352, RNC 302 is by the availability of notification message to UE 300 notifying MBMS services.RNC 302 was assigned to common signal channel with it before this notification message is sent to UE 300, for example Secondary Common Control Physical Channel (S-CCPCH).(MCCH) sends this notification message by the MBMS control channel, will begin to provide MBMS business to the UE 300 of this MBMS business of expectation to UE 300 notice SGSN 304.This notification message is by a plurality of UE pagings, and is used to the paging of execution group and handles.Group paging in the step 352 is handled to handle with independent paging and is differentiated.

In step 361, UE 300 sends to SGSN304 in response to notification message with push-notification-answer message.RNC 302 determines that by push-notification-answer message the expectation of each sub-district receives the number of the UE of MBMS business, and is determined to the type of the radio channel of respective cell.If expectation receives the number of UE of MBMS business more than or equal to predetermined threshold, then RNC 302 is by being used for point-to-multipoint (point-to-multipoint, PtM) Chuan Shu common signal channel and provide MBMS business to UE.Yet, if expectation receives the number of UE of MBMS business less than predetermined threshold, the dedicated channel of RNC 302 point-to-point by being used for (PtP) transmission and provide the MBMS business separately to each UE.

In step 371, RNC 302 sends to UE 300 by MBMS control channel (MCCH) with the relevant information that is used to send the radio bearer (RB) of MBMS business.Based on this MBMS RB information, and between RNC 302 and UE 300, set up radio bearer.RB set up to handle and to be used to provide the information of the radio channel of MBMS business to be issued to relevant apparatus with relevant, makes UE 300 can utilize this MBMS RB information and MBMS business that correct recovery is sent.MBMS RB information comprises radio channel information, and for example Orthogonal Variable Spreading Factor OVSF (OVSF) code information, transport format information, radio link control (RLC) information, grouped data are assembled (convergence) control information etc.

If the type of MBMS channel is confirmed as the PtP type, then MBMS RB information is sent to UE 300 by Dedicated Control Channel.Yet if the type of MBMS channel is confirmed as the PtM type, MBMS RB information is sent to UE 300 by MCCH.

MCCH provides the channel of the control information relevant with the MBMS business, and the precise characteristics of MCCH at present just under discussion.According to discussion result up to now, MCCH has following characteristic:

1.MCCH for each unit forms separately.

2.MCCH be that public physic channel by for example S-CCPCH sends.

3.UE the information that can obtain the relevant MCCH that forms separately for each unit is as system information.

In step 381, RNC 302 will send to UE 300 from the MBMS data that SGSN 304 provides by MBMS RB, and UE 300 receives the MBMS data that send by MBMS RB.

Fig. 4 is the figure that illustrates the structure that a plurality of Frequency Distribution (FA) overlap each other in the specific region.With reference to figure 4, RNC has one or more FA, and provides MBMS data by these FA.Reference numeral 401,402,403 shown in Fig. 4 and the identical geographic region of 404 representatives, and representative wherein utilizes different FA that the sub-district of MBMS business is provided.The one or more UE that are arranged in 4 FA are provided to from the MBMS data of FA transmission.That is to say that these FA represent the same area of geographical aspect, but with regard to supporting MBMS data frequency aspect, represent 4 different service cells.As mentioned above, traditionally, a plurality of FA overlap each other in same geographic region, and each FA is to the identical MBMS data of one or more UE distributions.

Here, the MBMS data that send are identical MBMS data, and radio resource is assigned to each FA separately, are used for the transmission of MBMS data, and this causes the waste of limited wireless electric resources.

If the specific FA place of this MBMS business among each FA is unavailable, then wherein among the professional disabled FA of MBMS included UE can not receive the MBMS business.For example, if FA2 402 can support the MBMS business, but FA1 401, FA3 403 and FA4 404 can not support the MBMS business, and then the UE that comprises among FA1 401, FA3 403 and the FA4 404 can not receive this MBMS business.

So, need a kind of UE that in the FA that can not support the MBMS business, comprises that the method for MBMS business is provided.

Summary of the invention

So, an object of the present invention is to provide a kind of method that is used for receiving this Packet data service at the UE that mobile communication system allows to be arranged in the disabled sub-district of Packet data service.

Another object of the present invention provide a kind of be used for relevant be arranged in same area but have different frequency each sub-district Packet data service can with the information of sub-district send to the method for the UE that is positioned at specific cell as system information.

Another object of the present invention provide a kind of be used for relevant be arranged in same area but have different frequency each sub-district Packet data service can with the information of sub-district send to the method for the UE that is positioned at specific cell by control channel.

Another object of the present invention provides a kind of method that is used for the information of relevant adjacent node B is sent to the UE of the specific cell that is located at each sub-district that is arranged in same area but has different frequency.

Another object of the present invention provides a kind of UE for the specific cell that is located at each sub-district that is arranged in same area but has different frequency, method of reselecting in the execution sub-district, preferred frequency band place that is used for the MBMS business of being used for.

Another object of the present invention provides and a kind ofly is used for for the UE that receives the MBMS business in mobile communication system, carries out the method that effective frequency measurements and inter-frequency cell are reselected.

According to a first aspect of the invention, provide a kind of be used for having in the mobile communication system of support multimedia broadcast/group broadcast service (MBMS) that different frequency distributes (FA) at the same area select the sub-district to receive the method for MBMS business by subscriber equipment (UE), the method comprising the steps of: by radio network controller (RNC) information of relevant MBMS sub-district is sent to UE, this MBMS cell information comprises and is used to guarantee that the sub-district reselects to the MBMS skew of the priority of MBMS sub-district; Carry out the sub-district and reselect with utilize this MBMS cell information by UE, and from the sub-district of reselecting, receive the MBMS business.

According to a second aspect of the invention, provide a kind of being used for to have the method for reselecting the sub-district that is used for the MBMS business in the mobile communication system of support multimedia broadcast/group broadcast service (MBMS) that different frequency distributes (FA) at the same area, the method comprising the steps of: by radio network controller (RNC) system information block (SIB) is sent to subscriber equipment (UE), this SIB comprises and indicates the identification information whether neighbor cell can be used for this MBMS business; Carry out the sub-district of MBMS sub-district reselects with utilizing this SIB by UE.

According to a third aspect of the invention we, provide a kind of being used for to have the method for reselecting the sub-district that is used for the MBMS business in the mobile communication system of support multimedia broadcast/group broadcast service (MBMS) that different frequency distributes (FA) at the same area, the method comprising the steps of: will indicate the identification information whether neighbor cell can be used for the MBMS business by control messages by radio network controller (RNC) and periodically send to subscriber equipment (UE); Reselect with the sub-district that utilizes the identification information that receives by control messages to carry out the MBMS sub-district by UE.

According to a forth aspect of the invention, provide a kind of be used for having in the mobile communication system of support multimedia broadcast/group broadcast service (MBMS) that different frequency distributes (FA) by subscriber equipment (UE) at the same area carry out the method that the sub-district of preferred frequency band is reselected, the method comprising the steps of: from the message that radio network controller receives the information of the optimized frequency that comprises MBMS task identifier (ID), relevant MBMS business and the MBMS that is used to guarantee reselect the sub-district is offset; Utilize the information that comprises in this message and carry out inter-frequency measurements; If, then carry out the sub-district and reselect with the received power of the preferred frequency band that is used for the MBMS sub-district received power height than the frequency band that is used for current area.

According to a fifth aspect of the invention, provide a kind of be used for having in the mobile communication system of support multimedia broadcast/group broadcast service (MBMS) that different frequency distributes (FA) by radio network controller (RNC) at same geographic region provide the method for MBMS business to the subscriber equipment that is arranged in non-MBMS FA (UE), the method comprising the steps of: by RNC the system information block (SIB) that comprises the information of relevant MBMS FA is sent to UE; With with comprise relevant MBMS FA information message cycle send to UE.

According to a sixth aspect of the invention, provide a kind of being used for to have the method that is received the MBMS business in the mobile communication system of support multimedia broadcast/group broadcast service (MBMS) that different frequency distributes (FA) by the subscriber equipment that is arranged in non-MBMS FA (UE) at same geographic region, the method comprising the steps of: the system information block (SIB) that receives the information that comprises relevant MBMS FA from radio network controller (RNC); Analyze the information of the relevant MBMS FA among the SIB; Reselect with the sub-district of carrying out MBMS FA based on this analysis result.

According to a seventh aspect of the invention, provide a kind of and be used for having different frequency at the same area and distribute the support multimedia broadcast/group broadcast service (MBMS) of (FA) and comprise the method that is received the MBMS business in the mobile communication system of at least one non-MBMS sub-district by the subscriber equipment that is arranged in non-MBMS FA (UE), the method comprising the steps of: the information that is received relevant MBMS sub-district by UE from radio network controller (RNC); Ask specific MBMS business by UE; Analyze the information that is received; With reselect the professional available sub-district of specific MBMS based on this analysis result.

According to an eighth aspect of the invention, provide a kind of being used for to have comprising professional disabled at least one sub-district of MBMS and provide in the mobile communication system of other sub-districts of MBMS business by radio network controller (RNC) and providing the method for MBMS business to the subscriber equipment (UE) that is arranged in the professional disabled sub-district of MBMS of different frequency at the same area, the method comprising the steps of: send the system information block (SIB) that is used for the MBMS business to UE by RNC; In case receive request, just reselect the professional available sub-district of specific MBMS by UE for specific MBMS business; Be used in the radio resource that this specific MBMS business is provided with dividing to UE.

Description of drawings

Following detailed description in conjunction with the drawings, above and other purpose of the present invention, feature and advantage will become clearer, wherein:

The figure of the configuration of general mobile communication system that Fig. 1 is an indicative icon;

The figure of the configuration of MBMS system that Fig. 2 is an indicative icon;

Fig. 3 is the message flow chart of the operation between the node that illustrates in the mobile communication system of supporting the MBMS business;

Fig. 4 is the figure that illustrates the configuration that a plurality of sub-districts overlap each other in the specific region;

Fig. 5 is the message flow chart of process that is used to reselect the MBMS sub-district that illustrates according to first embodiment of the invention;

Fig. 6 is the message flow chart of process that is used to reselect the MBMS sub-district that illustrates according to second embodiment of the invention;

Fig. 7 illustrates to be used to carry out the message flow chart that the sub-district reselects to the process of the preferred frequency band of supporting the MBMS business according to third embodiment of the invention;

Fig. 8 is the flow chart that illustrates according to the operation of the UE of support of the present invention MBMS business; With

Fig. 9 is the flow chart that illustrates according to another operation of the UE of support of the present invention MBMS business.

Embodiment

Describe several preferred embodiments of the present invention in detail referring now to accompanying drawing.In the following description, for the sake of simplicity, omitted the known function of merging here and the detailed description of configuration.

The present invention proposes a kind of method that is used for providing the MBMS business to a plurality of UE that are positioned at the different FA that cover identical geographic region.In addition, the present invention proposes the method that a kind of UE that is used for allowing being positioned at the professional disabled FA of MBMS receives the MBMS business.

With reference to figure 5, now will to when having the professional available FA of MBMS among a plurality of FA that in the same area, overlap each other, the UE that allows to be arranged in the professional disabled FA of the MBMS method that receives the MBMS business is described.

Fig. 5 is the message flow chart of process that is used for providing to UE the information of the professional available FA of relevant MBMS that illustrates according to the embodiment of the invention.With reference to figure 5, Reference numeral 501 representatives provide the FA (following be called for the sake of simplicity " MBMS FA ") of (or available) MBMS business, and

Reference numeral

502 and 503 representatives do not provide the FA (following be called for the sake of simplicity " non-MBMSFA ") of (or unavailable) MBMS business.Reference numeral 501,502 and 503 is represented the FA that overlaps each other and use different frequency in same geographic region.Each FA can comprise one or more sub-districts.For the ease of explaining, will suppose that here each FA has a sub-district.In the following description, term " FA " and " sub-district " are used interchangeably.Reference numeral 511 representatives are used to provide the RNC of MBMS business, and Reference numeral 521 is represented SGSN.In the following description, will suppose that UE is in idle pulley.

In step 531, RNC 511 sends to corresponding FA with the system information block (SIB) that comprises the information of relevant MBMS FA 501.Here, RNC 511 sends to FA 501,502 and 503 with different system information.Thereby, be arranged in FA 501,502 and can have different SIB with 503 UE.RNC 511 adds the information of relevant MBMS FA 501 to SIB recently, and this new SIB is sent to (FA's) all sub-districts 501,502 and 503.

In this respect, the present invention proposes following 3 kinds of methods, be used to define the SIB of the information that is used to send relevant FA.

In the SIB of first method current use in using 3GPP (third generation partnership projects) standard, the information that part is added relevant MBMS FA.

Second method is used the special-purpose SIB that supports the MBMS business.

The third method is added the offset information that is used for MBMS FA.The third method may be used on the SIB that uses according to first method in current 3GPP standard, perhaps may be used on the special-purpose SIB according to the MBMS of second method.In an embodiment of the present invention, the third method is added offset information to first method.

First method

Table 1 illustrates the SIB that information that the SIB that passes through current use in the 3GPP standard according to the embodiment of the invention adds relevant MBMS FA obtains.For brevity, SIB will be called as " SIB11/12 ".The information that SIB 11/12 representative is such, it comprises the information SIB 11 of the UE that is used to be in idle pulley and is used to be in the information SIB 12 of the UE of connection mode.

Table 1

Figure 2004800234831-YZ0000013545514-000091

SIB 11/12 comprises the measuring control information of using in the sub-district, and comprises measuring control information, inter-frequency measurements control information, the control information of RAT (radio access technologies) measurements in the frequency.

This measuring control information-as the neighbor cell list of the measuring object in the sub-district-comprise cell information tabulation between cell information tabulation, inter-frequency cell information list, RAT in the frequency.

This neighbor cell list comprises the information of relevant MBMS FA.That is to say that this neighbor cell list comprises frequency information, cell ID, cell information of MBMS FA etc.

The frequency information of FA comprises the absolute radio-frequency channel numbering of up link UTRAN (UARFCN) and down link UARFCN.

Cell ID (sub-district ID) is the identification information that unique branch is tasked each sub-district.That is to say that sub-district ID is that branch is tasked each sub-district to be identified at the unique value of a plurality of sub-districts that exist among the FA.This sub-district ID in the present invention, has a sub-district, so also can be used as the ID that identifies FA because suppose each FA.

The main scrambler of the Primary Common Pilot Channel (P-CPICH) of cell information representative and MBMS FA corresponding district.

So RNC 511 is " allowing the sub-district indication of the MBMS " information-add SIB 11/12 to of table 1 of the information of the professional available sub-district of relevant MBMS (below be called " MBMS sub-district ")-promptly, and the SIB 11/12 that has added information is sent to UE.

Information is endowed integer value " to allow the sub-district indication of MBMS ".If allow the sub-district indication of MBMS to be set to " 0 ", this means that then Target cell or FA 501 are the professional disabled sub-districts (" non-MBMS sub-district ") of MBMS.Yet,, this means that Target cell or FA 501 are the MBMS sub-districts that belong to the different Node B of the Node B that is currently located at UE if allow the sub-district indication of MBMS to be set to " 1 ".In addition, if allow the sub-district indication of MBMS to be set to " 2 ", this means that then Target cell or FA 501 are the MBMS sub-districts that belong to the identical Node B of the corresponding Node B in the sub-district (FA 502 or FA 503) that is currently located at UE.

Allow the sub-district indication of MBMS can be optimised for 2 bit lengths, rather than 3 bit lengths shown in the table 1.In this case, when determining whether sub-district that UE is positioned at and the Target cell that is used for reselecting the sub-district belong to same Node B, with the sub-district indication of the described permission of an integer representative MBMS.

In other words, allow the sub-district indication of MBMS different with integer 1 and integer 2 representatives when whether belonging to same Node B, the integer 0 that the sub-district indication of permission MBMS is set to be used for the integer 1 of MBMS sub-district and is used for non-MBMS sub-district with definite MBMS sub-district.With the irrelevant situation of Node B under, adjudicate UE based on frequency measurement and will carry out the sub-district and reselect to which sub-district among the available sub-district of MBMS business.That is to say that as the result of frequency measurement, UE is set to the sub-district of " 1 " in the sub-district indication that is arranged in five-star sub-district selection permission MBMS.

Return with reference to figure 5, in step 531, the UE that is arranged in FA 502 or FA 503 analyzes the SIB 11/12 that sends to the sub-district indication field that allows MBMS comprising of each respective cell separately, and whether definite neighbor cell can be used for the MBMS business.That is to say, the corresponding UE that is arranged in FA 502 or FA 503 determine based on the sub-district indication field of the permission MBMS of SIB 11/12 sub-district that whether adjacent FA 501 can be used for MBMS business and FA 501 whether belong to corresponding to the identical Node B of the Node B of its current area.

Yet the UE that is arranged in the sub-district of FA 501 can not be based on 501 SIB 11/12 that send and determine whether its sub-district is the MBMS sub-district from the sub-district.This is because SIB 11/12 comprises the FA information that is used for neighbor cell.

So the UE that is arranged in FA 501 analyzes the information of relevant MCCH by another SIB that sends to its sub-district, and whether definite FA 501 is MBMS sub-districts.Replacedly, UE is applied to and supports the SIB 3/4 of the MBMS business in its sub-district 501 to determine whether its sub-district 501 is MBMS sub-districts by " allowing the sub-district indication of the MBMS " information that will use among the SIB11/12.

SIB 3/4 comprises the information of reselecting about the cell selecting of the UE of the UE of idle pulley and connection mode and sub-district.Whether SIB 3/4 comprises the sub-district indication field that allows MBMS, be the MBMS sub-district to indicate current area.And the sub-district indication field of described permission MBMS can be included among other SIB.

So, the UE that is arranged in the sub-district of FA 501 compares " allowing the sub-district indication of the MBMS " information of SIB 11/12 use and " indicate the sub-district of permission MBMS " information that SIB 3/4 uses, if and existed the sub-district of the permission MBMS of SIB 3/4 to indicate, would determine then whether FA 501 is MBMS sub-districts.

Second method

Table 2 illustrates the special-purpose SIB according to the support MBMS business of the embodiment of the invention.

Table 2

As shown in table 2, RNC 511 is provided with the special-purpose SIB of MBMS (or only be used for MBMS SIB) of the information that comprises relevant MBMS sub-district, and the special-purpose SIB of MBMS is sent to respective cell separately.

Whether the sub-district of the cell information field indication current UE of the permission MBMS among the special-purpose SIB of MBMS is the MBMS sub-district.If it is the MBMS sub-district that the sub-district of current UE, then allows the sub-district of the cell information field indication current UE of MBMS corresponding to MBMS FA, and the cell information field of described permission MBMS comprises the information of the sub-district of relevant UE.

Whether the indication field indication MBMS sub-district, same services district among the special-purpose SIB of MBMS is the sub-district that has the same services district with the sub-district of current UE, and promptly whether the MBMS sub-district is the sub-district that is included in the Node B identical with the Node B of UE.

The ID of the id field indication MBMS sub-district, sub-district among the special-purpose SIB of MBMS.

Frequency information field indication up link UTRAN absolute RF channel number (UARFCN) and down link UARFCN among the special-purpose SIB of MBMS.

Cell information field indication among the special-purpose SIB of MBMS is used for the main scrambler corresponding to the Primary Common Pilot Channel (P-CPICH) of the sub-district of MBMS FA.

So, receive the specific FA of the special-purpose SIB of MBMS or the UE of sub-district the MBMS service request be issued to the sub-district that described same services district indication field has true value, and carry out the sub-district about the sub-district then according to qualifications and reselect.Analyzed the special-purpose SIB of the MBMS shown in the table 2 in step 531 after, each UE that is arranged in FA 501, FA 502 and FA 503 determines whether its current area can be used for this MBMS business.

The third method

Table 3 has proposed a kind of permission UE and has utilized MBMS_Qoffset_s, the method that n information and executing sub-district is reselected.For convenience's sake, this third method is with MBMS_Qoffset_s, and n information is applied to the SIB that uses in the first method.Replacedly, this third method can be with MBMS_Qoffset_s, and n information is applied to the SIB that uses in the second method.SIB representative according to the third method comprises MBMS_Qoffset_s, and the SIB 11/12 of the sub-district indication field of n field rather than permission MBMS is as shown in table 3.

Table 3

Figure 2004800234831-YZ0000013545514-000131

This MBMS_Qoffset_s, the n value is the optional value that only comprises in SIB 11/12 when supporting the MBMS business as the neighbor cell of frequency measurement object.When the UE that is in idle pulley or CELL_FACH, CELL_PCH and URA_PCH state carries out cell selecting and sub-district when reselecting, use this MBMS_Qoffset_s, the n value.

Return with reference to figure 5, in step 541, the UE among FA 501, FA 502 and the FA503 carries out adition process (or service request procedure).In the adition process of step 541, each UE among FA 501, FA 502 and the FA 503 will be used to expect that the identification code of MBMS business and UE ID thereof send to SGSN 521.UE among 521 couples of FA 501 of this SGSN, FA 502 and the FA 503 carries out checking.

According to first method, in step 551, the UE among the

non-MBMS FA

502 and 503 carries out sub-district indication field that the sub-district reselects to the permission MBMS among the SIB 11/12 wherein according to qualifications and is set to 2 sub-district.The sub-district indication field that if there is no has the permission MBMS of value 2, then UE carries out the sub-district and reselects to the MBMS sub-district that the sub-district indication field that wherein allows MBMS has value 1.In this case, the sub-district indication field of this permission MBMS has the length of 3 bits.

Yet, have in the sub-district indication field of this permission MBMS under the situation of length of 2 bits, as the result of frequency measurement, UE carries out the sub-district and reselects to and be positioned at five-star sub-district in the MBMS sub-district.UE among the

non-MBMS FA

502 and 503 covers identical service area, and at first carry out in the frequency and measure rather than inter-frequency measurements, thereby reselect with MBMS FA 501 corresponding district according to qualifications rather than cover the special neighbourhood FA (or sub-district) of another service area.

According to second method, in step 551, the UE among the

non-MBMS FA

502 and 503 analyzes the information of relevant MBMS sub-district by the cell information field of the permission MBMS among the special-purpose SIB of MBMS.Whether in addition, UE analyzes this same services district indication field, be the sub-district that belongs to the identical Node B of the Node B that is positioned at them to determine this MBMS sub-district, and carry out cell selecting to the sub-district that belongs to same node point B.In order to carry out the sub-district that reselects to MBMS FA, UE must satisfy the received power measurement result.

According to the third method, in step 551, when the UE in

non-MBMS FA

502 and 503 had the MBMS business contexts after step 541 adds the MBMS business, they utilized following formula (3) to carry out the sub-district and reselect.

Below formula (1) and formula (2) be current undefined in the 3GPP standard, be used for the formula that the sub-district is reselected by UE.

When UE reselected the sub-district, if as the result of frequency measurement, neighbor cell satisfied the S standard of cell selecting, then according to the R standard is sorted successively in the sub-district.In current 3GPP standard, as the formula of giving a definition the R standard.Because the parameter of using in the following formula defines in 3GPP TS25.304, so will omit its detailed description here.

Rs＝Qmeas，s+Qhysts ......(1)

Rn＝Qmeas，n-Qoffset，n-Ton*(1-Ln) ......(2)

Here, Rs represents the R standard of current service cell, and Rn represents the neighbor cell that comprises among the SIB11/12.As mentioned above, only just use Rn for the sub-district of satisfying the S standard.

In order to reselect the MBMS sub-district, if the MBMS_Qoffset_s of table 3, the n value is applied to the R standard of formula (2), and then it becomes formula (3):

Rn＝Qmeas，n-Qoffset，n-Ton*(1-Ln)+MBMS_Qoffset_s，n ......(3)

In other words, if thereby UE has the MBMS business contexts after step 541 adds the MBMS business receive the MBMS business, and then UE utilizes formula (3) to reselect the sub-district.That is to say that transmission comprises MBMS_Qoffset_s, the FA 501 of the SIB 11/12 of n value is than the MBMS_Qoffset_s that does not have among the SIB 11/12, and the FA 502 of n value and FA 503 have bigger Rn value.

So in step 551, the UE among the

non-MBMS FA

502 and 503 reselects has the MBMS_Qoffset_s of comprising, the sub-district of the SIB 11/12 of n value.By this way, when reselecting according to local resource execution sub-district, UE utilizes MBMS_Qoffset_s, and the n value has increased the selection possibility of MBMS sub-district, guarantees the continuity of the MBMS business during UE moves thus.

That is to say that by be used for the MBMS deviant of MBMS sub-district in the R normalized form reflection that is used for reselecting the sub-district, the MBMS sub-district is positioned at higher grade than non-MBMS sub-district.

So the UE of request MBMS business has increased the possibility of reselecting with the MBMSFA corresponding district by the R normalized form of revising.With identical MBMS_Qoffset_s, the n value is applied to all sub-districts that wherein can use the MBMS business, or with different MBMS_Qoffset_s, the n value is applied to each neighbor cell of current service cell separately.

In addition, in step 551, can the UE that ask the MBMS business differently be set for UE that is in idle pulley and the UE that is in connection mode and carry out the time that the sub-district reselects to the sub-district of MBMS FA.That is to say, because be in the current MBMS data that do not send of the UE of idle pulley, promptly do not carry out specific operation, so it moves to MBMS FA 501 immediately after sending the MBMS service request.Yet when the actual session of MBMS data begins, rather than after sending the MBMS service request, the UE that is in connection mode moves to MBMS FA 501.

In order to simplify the operation of UE, being in can be identical with the UE that is in idle pulley except the operation of the UE of other connection status of CELL_DCH state.In order to simplify the operation of UE, carry out the time that the sub-district reselects to the MBMS sub-district although for UE that is in idle pulley and the UE that is in connection mode UE is set differently in the following description, if carry out the time that the sub-district reselects to the MBMS sub-district but use the UE that is in except other connection status of CELL_DCH state as idle pulley, then the operation of UE is identical with the UE that is in idle pulley.

In step 561, the UE that is in idle pulley that the execution sub-district reselects to MBMS FA 501 sends the dedicated radio resource request in response to the user's voice call request, and UE is intended to move to the CELL_DCH state.In this case, owing to, reselect to another sub-district so UE is intended to carry out the sub-district except having lacked the available dedicated radio resource the previous resources reserved for the MBMS business is provided.

So, utilize the redirection information field radio resource controller (RRC) connection refused message that in the processing of setting up the RRC connection, sends to UE, and the sub-district in the execution in step 561 is reselected from RNC.That is to say, in step 561, the UE that finishes the operation in the CELL_DCH state behind another sub-district that moves to except MBMS FA 501 utilizes this redirection information field to carry out cell selecting to the sub-district corresponding to MBMS FA 501, to receive this MBMS business once more.

In step 571, the UE that moves to another sub-district after being positioned at MBMS FA 501 carries out the sub-district of MBMS sub-district and reselects.UE analyzes " allowing the sub-district indication of MBMS " or " allowing the cell information of MBMS " of relevant adjacent MBMS sub-district by the SIB shown in table 1 or the table 2, and the sub-district is carried out in the MBMS sub-district of correspondence reselect.

Fig. 6 is that the number that illustrates the MBMS FA among the FA that overlaps each other in the same area is at least under 2 the situation, is used to reselect the message flow chart of the process of the professional available sub-district of MBMS.With reference to figure 6,

Reference numeral

601 and 602 is represented MBMS FA, and Reference numeral 603 and the non-MBMS FA of 604 representatives.Reference numeral 601,602,603 and 604 is represented the FA that overlaps each other and use different frequency in same geographic region.Each FA can comprise one or more sub-districts.For the ease of explaining, will suppose that here each FA has a sub-district.In the following description, the sub-district that the FA representative is different, and term " FA " and " sub-district " are used interchangeably.Reference numeral 611 representatives are used to provide the RNC of MBMS business, and Reference numeral 621 is represented SGSN.The system information block (SIB) that Reference numeral 63 1 representatives send from RNC 611, and SIB 631 has different information in FA 601,602,603 and 604.A kind of first, second and the third method that is used for utilizing SIB to adopt to the method that is arranged in the UE of FA 601,602,603 and provides the information of relevant MBMSFA that Fig. 5 proposes with 604.

According to first method, the SIB that sends to MBMS FA 601 comprises the information as the relevant MBMS FA 602 of the information of relevant neighbor cell, and the SIB that sends to MBMS FA 602 comprises the information as the relevant MBMS FA 601 of the information of relevant neighbor cell.In addition, sending to

non-MBMSFA

603 and 604 SIB comprises as the relevant MBMS FA 601 of the information of relevant neighbor cell and 602 information.

As in conjunction with shown in Figure 5, the information that whether can be used for the MBMS business about the information of adjacent MBMS sub-district and the sub-district that indicates UE can be analyzed by following steps: check whether the MBMS configuration information is included among another SIB, or whether can be used for the information of MBMS business by the sub-district that the comparison inspection with SIB 3/4 indicates UE.

According to second method, when use was used for the special-purpose SIB of the new MBMS of MBMS business, UE can analyze the information of relevant neighbor cell and the information of relevant its current area simultaneously.

According to the third method, UE comprises MBMS_Qoffset_s by analyze sending, the MBMS FA 601 of the SIB11/12 of n value and 602 and definite MBMS sub-district.

In the adition process of step 641, request MBMS business.

In step 651, after step 641 was carried out adition process, the execution sub-district reselected to the sub-district corresponding to MBMS FA corresponding to the UE that is in idle pulley in the sub-district of MBMS FA 603 or 604.In this case, the UE that is in idle pulley has the MBMS FA 601 of the relevant covering the same area that obtains in step 631 and the information of two sub-districts of 602.Under situation shown in Figure 5, because only a FA (or sub-district) can be used for the MBMS business, so when UE moved to MBMS FA in the same area, UE can receive the MBMS business of expectation.Yet, under situation shown in Figure 6,, can not determine that for the SIB that each sub-district sends separately which MBMS FA provides the MBMS business of expectation so UE only utilizes in step 631 because there are two MBMS FA.

So,, then select FA 601 or FA 602 according to the received power measurement result of UE in step 651 if

FA

601 and 602 provides identical MBMS business.That is to say, reselect the sub-district according to the optimized frequency of UE.Yet, if

FA

601 and 602 provides different MBMS business, UE in step 651 according to the MBMS business of the being asked available FA of reselecting whether, rather than according to the professional FA that reselects of the specific MBMS of expectation.

In step 661, the SGSN 621 that recognizes the professional beginning of MBMS will indicate session that the MBMS business is about to begin to begin message and sends to RNC 611.In step 662, receive RNC 611 that this session begins message and the MBMS notification message is sent to begin the MBMS FA of message corresponding to this session in FA 601 and 602.This notification message is not sent to the sub-district that is used for non-MBMS FA 603 and 604.This notification message comprises corresponding MBMS traffic ID, is used for counting indication, necessary probability factor of RRC attended operation and the relevant information that the MBMS FA of this MBMS business is provided to the necessity of the UE notice RRC connection that is in idle pulley.This MBMS FA information comprises frequency information, sub-district ID, cell information and the MBMS skew of corresponding FA.

For example, in step 662, if corresponding to the MBMS business of notification message is MBMS business corresponding to the FA in

MBMSFA

601 and 602 601, the UE that then is arranged in the FA 602 that receives this notification message reselects the sub-district of FA 601, to receive the data of MBMS business.That is to say that in step 651, UE selects MBMS FA according to the MBMS availability of traffics, and in step 662, UE is according to the professional MBMS FA that reselects of the specific MBMS of expectation.

In step 671, the UE of idle pulley that is arranged in FA 602 reselects the sub-district of FA 601 after receiving this notification message.In this case, the UE that is arranged in the idle pulley of FA 602 must satisfy the received power measurement result relevant with the sub-district of FA 601.That is to say that if the result that the conduct received power relevant with the sub-district of FA 601 measured, the MBMS business that is provided by FA 601 can be provided the UE that is arranged in FA 602, then they reselect the sub-district of FA 601.

Under the situation of step 662 and 671, UE specific MBMS business according to expectation before the session that is used for the MBMS business begins is selected FA.Under the situation of step 681, when carrying out the MBMS business, UE is according to the professional FA that selects of the specific MBMS of expectation.In step 681, UE utilizes the system information that receives in step 631 and reselect the MBMS sub-district according to qualifications in neighbor cell.Measure by received power by UE and to realize that the sub-district reselects, and UE analyzes the MBMS availability information from the reception of selected sub-district by MCCH.

The MBMS availability information is to indicate whether information available of specific MBMS business that UE expectation receives.So UE determines by analyzing this MBMS availability information whether specific MBMS business is available in the sub-district of reselecting.If determining the sub-district of reselecting is the professional disabled sub-district of specific MBMS of wherein UE request, then UE utilizes system information to move to another MBMS FA of service the same area.That is to say that UE utilizes system information to reselect to be used for the sub-district of another MBMS FA.

The MBMS availability information can comprise also whether the information of the professional available actual MBMS FA of the specific MBMS of relevant UE request and relevant MBMS business can be used for comprising the information of the sub-district of current UE.That is to say that the MBMS availability information comprises the information of the professional ongoing actual FA of MBMS of relevant wherein UE request.

In other words, the MBMS availability information is included in frequency information, sub-district ID, P-CPICH information, MBMS offset information of MBMS traffic ID, the sub-district of ongoing MBMS business in the sub-district of reselecting etc.So the UE that receives the MBMS availability information by MCCH determines whether specific MBMS business available in its current area, and if specific MBMS business unavailable in its current area, then carry out the sub-district and reselect to the professional available sub-district of specific MBMS.

Fig. 7 is the message flow chart that is used for providing at least two MBMS FA the process of MBMS business in conjunction with the diagram of process shown in Figure 6.In this case, use the MBMS deviant according to embodiments of the invention, and this process illustrates and is used for sending the method for information of the professional and relevant corresponding FA that another FA provides and the processing that the information of relevant each professional preferred frequency band is sent to UE after session begins by MCCH availability message.Here at least two FA of hypothesis provide different MBMS business, for example business 1 and professional 2.

With reference to figure 7,

Reference numeral

701 and 702 representatives receive the UE of MBMS business, and Reference numeral 703 representatives are used to provide the RNC of MBMS business.Here,

UE

701 and 702 is positioned at and the frequency band corresponding district except the preferred frequency band of MBMS business.

In step 711, received RNC 703 that sessions begin message 705 before session begins from SGSN 704, will comprise that the necessary notification of information message 711 of the preferred frequency band that moves to the MBMS business is issued to UE 701 and 702.In this notifier processes, RNC 703 can use the session of current definition to begin message or another single message.RNC 703 comprises that its session is with the information of the optimized frequency of the MBMS traffic ID of the MBMS business of beginning, relevant MBMS business be used to reselect the MBMS offset information of the sub-district of another frequency of use.

In step 712, the UE 701 of receiving notice message utilizes the optimized frequency of MBMS business to carry out inter-frequency measurements, thereby the sub-district is reselected to preferred frequency band in conjunction with the MBMS business.

In

step

713 and 714, RNC 703 will comprise that periodically the message of MBMS traffic ID, preferred frequency information and MBMS offset information sends to

UE

701 and 702, to support the mobility of UE.This message can send by MCCH.

The

UE

701 and 702 that receives the MBMS business carries out inter-frequency measurements immediately under following situation:

1) before session begins, when the preferred frequency band of the MBMS business of determining by notification message to add was not the frequency band of current area, UE carried out inter-frequency measurements immediately.

2) during session, when UE carry out that the sub-district is reselected and the preferred frequency band of the frequency of the sub-district determining by the control messages that periodically sends to be reselected and corresponding MBMS business not simultaneously, UE carries out inter-frequency measurements immediately.

In other words, when the UE of request MBMS business received the notification of information message 711 of the optimized frequency that comprises relevant MBMS business that sent before session begins, it carried out inter-frequency measurements.

Replacedly, when the MBMS of MBMS business session is being carried out and the UE that receives the MBMS business when having reselected new sub-district owing to UE moves, if UE determines that by the

control messages

713 and 714 that periodically sends the preferred frequency band of MBMS business is different with the frequency of selected sub-district, then UE should carry out inter-frequency measurements.

When

UE

701 or 702 be received in the notification message that session sends before beginning or the control messages that during session, sends, and when attempting that the sub-district reselected to the preferred frequency band of MBMS business, if carry out the sub-district of another frequency band except the frequency band of supporting the MBMS business reselects owing to the poor radio state of transmission band, then UE rests on current area, rather than the sub-district of carrying out another frequency band is reselected.This is because another frequency band that the sub-district reselects to except preferred frequency band equates with performance in resting on current area, and causes that another measurement and sub-district reselect.The UE that rests in the current area passes through request MBMS business, even can receive the MBMS business in the current area.

Even Sx during inter-frequency measurements (representative is by carrying out the value that frequency measurement obtains in the current area that is used for the professional X of specific MBMS) is greater than Sinter (representative is in order to carry out the threshold value that inter-frequency measurements is provided with), the UE that receives the MBMS business in resting on current area also must carry out inter-frequency measurements.Unless this be because Sx less than Sinter, otherwise reselect to the sub-district of preferred frequency band the failure UE will not carry out inter-frequency measurements for the sub-district reselects to the preferred frequency band that is used for the MBMS business, avoid the sub-district to reselect to optimized frequency thus.

For example, measuring period or forward access channel (FACH) at compact model are measured occasion in the cycle, promptly as the cycle of carrying out inter-frequency measurements according to the state of UE and pattern specified frequency measurements in the cycle, UE carries out inter-frequency measurements, and has nothing to do with the value of Sx.

Even Sx＞Sinter, UE also must periodically carry out preferred frequency band for the sub-district reselects to preferred frequency band and measure.UE not only periodically carries out and measures based on measuring period but also based on predetermined timer value or cycle.This timer value before sent by system information.

So, the inter-frequency measurements of execution cycle property when the sub-district reselects to the UE that fails on the preferred frequency band to rest on current area, if and this inter-frequency measurement results satisfies the sub-district and reselect condition, then carry out the sub-district of the preferred frequency band of MBMS business and reselect.

Carry out the UE that the sub-district of the preferred frequency band of MBMS business reselects and in step 711,713 and 714, use MBMS skew from RNC 703.That is to say, the MBMS offset information that is included in the message that is sent in the step 711,713 and 714 is provided, with the preferred frequency band of the support MBMS business that priority is better than other frequency bands.By applying MBMS skew to preferred frequency band, the sub-district at optimized frequency place is reselected the sub-district that probability is higher than other frequency places and is reselected probability.

As described in conjunction with formula (3), with the Rn value of the preferred frequency band corresponding district of specific MBMS business than the big MBMS skew of Rn value corresponding to the sub-district of other frequencies.As a result, there is very high probability in following situation, will have than corresponding to the high priority in the sub-district of other frequencies (or grade) corresponding to the sub-district of preferred frequency band.And there is very high probability in following situation, and the UE of expectation reception MBMS business will carry out the sub-district of preferred frequency band and reselect.Although still reselected the sub-district that is used for other frequency bands if applied the MBMS skew, then UE still rests on current area, does not reselect and do not carry out the sub-district.

Fig. 8 is the flow chart based on the operation of the UE of first and second methods that illustrates according to the embodiment of the invention.With reference to figure 8, in step 801, the UE that is in idle pulley is from sub-district receiving system information that it is currently located at.But this system information comprises about the information of the MBMS FA that overlaps each other at same geographic region and the relevant information that is not positioned at the available neighbor cell of same district MBMS business.

That is to say that UE receives the system information comprise the cell information field that allows MBMS according to first method, receive the special-purpose SIB of MBMS of redetermination, or reception comprises MBMS_Qoffset_s, the SIB of n value according to third party's method according to second method.

In step 802, UE determines whether the specific MBMS business of expectation is available in current area.If the specific MBMS business of expectation is available in current area, then UE proceeds to step 821.Yet if the specific MBMS business of expectation is unavailable in current area, UE proceeds to step 811, carries out normal running therein.

In step 821, UE determines whether the MCCH configuration information is comprised in from the system information that the sub-district sent that it is currently located at.That is to say that according to first method, UE analyzes the SIB comprise the sub-district indication that allows MBMS, whether available and whether MBMS is professional available in neighbor cell in current area with definite MBMS business.According to second method, UE determines based on the cell information field of the permission MBMS among the special-purpose SIB of MBMS and same services district indication field whether the MBMS business is available in current area.According to third party's method, UE is based on MBMS_Qoffset_s, n value and determine whether the MBMS business is available in current area.

If in the MCCH configuration information that step 821 is identified for the MBMS business is not comprised in from the system information of current area or current area be not useable for specific MBMS business, then UE proceeds to step 841.Yet if determine during the MCCH configuration information is comprised in from the system information of current area or current area can be used for specific MBMS business in step 821, UE proceeds to step 831.

In step 831, the MCCH of UE receiving cycle transmission opens according to the control messages that sends by MCCH and works.In step 841, UE receives the SIB 11/12 of the information that comprises relevant adjacent MBMS sub-district, or receives the special-purpose SIB of MBMA of the redetermination that comprises the cell information field that allows MBMS, and it indicates the information of relevant neighbor cell and the information of relevant its sub-district.In addition, UE receives and comprises MBMS_Qoffset_s, the SIB of n value, and it indicates the sub-district with priority that MBMS business be provided higher than other sub-districts.

In addition, UE considers its mobility and periodically receives the MCCH of the information comprise relevant MBMS FA.This MCCH comprises MBMS traffic ID and preferred frequency information.

In step 842, UE is based on the information of the relevant MBMS FA that is received, and the sub-district of carrying out MBMSFA or MBMS sub-district is reselected.UE analyze to allow the cell information field of MBMS, and the sub-district of the Node B of selecting according to qualifications to belong to identical with the Node B of its sub-district, promptly selects to cover the sub-district with the regional identical zone of its sub-district covering.The if there is no relevant information that covers the MBMS sub-district of same area, then the UE sub-district of carrying out another neighbor cell is reselected.If exist to cover the MBMS sub-district of same area, but this received power as a result of measuring as the received power that is used to receive the MBMS business is lower than threshold value, and then the UE sub-district of carrying out another adjacent MBMS sub-district is reselected.That is to say, must satisfy the received power measurement result reselecting of all sub-districts.If UE can not carry out the sub-district of the preferred frequency band of supporting the MBMS business and reselect, the inter-frequency measurements of its execution cycle property when resting on current area is then reselected satisfying the sub-district of carrying out preferred frequency band when condition is reselected in the sub-district thus.

Fig. 9 is the flow chart based on the operation of the UE of third party's method that illustrates according to the embodiment of the invention.With reference to figure 9, in step 901, UE begins message by notification message or in the message of session period transmission and receive session, or receives the information that is used for FLC (frequency layer convergence), i.e. traffic ID, frequency/cell information and MBMS offset information.In step 902, UE checks the traffic ID in the FLC information, to determine whether the MBMS business in the session in the sub-district is the MBMS business that UE adds.

If determine that in step 902 ongoing MBMS business is the MBMS business that UE adds, then UE checks in step 911 whether frequency information/cell information is identical with the cell information of current area.Yet if determine that in step 902 ongoing MBMS business is not the MBMS business that UE adds, if perhaps determine that in step 911 frequency information/cell information is identical with the cell information of current area, UE proceeds to step 912.In step 912, UE rests in the current area, and the sub-district that need not carry out the MBMS business is reselected.

Yet if determine that in step 911 cell information of frequency information/cell information and current area is inequality, whether UE exists any sub-district that will measure for the sub-district reselects step 921 inspection.That is to say that UE determines whether there is reply in step 921 according to frequency information/cell information, and it carries out any sub-district of measuring.If determine the sub-district that existence will be measured in step 921, then UE carries out in step 922 pair respective cell and measures.

In step 931, UE checks whether the measurement result of step 922 satisfies the S standard.If this measurement result satisfies the S standard, then UE is at the R normalized form of the correction of step 932 by using the use MBMS skew that proposes in the present invention, and sorted in the sub-district of the priority list that is used for reselecting the sub-district.This processing turns back to step 921 then.

Yet it carries out the sub-district of measuring if determine there is not reply in step 921 according to frequency information/cell information, and whether UE exists any sub-district of satisfying the S standard step 941 inspection.If there is the sub-district satisfy the S standard, then UE selects to have the sub-district (or sub-district of highest ranking) of limit priority in step 942 from the priority list that is used for the sub-district and reselects.In step 951, UE checks that whether the sub-district of this highest ranking is corresponding to the frequency information/cell information that receives in step 901.

If the sub-district of this highest ranking is corresponding to the frequency information/cell information that receives in step 901, then UE checks in step 961 whether this sub-district is subjected to the restriction in the system information of step 942 reception when stopping (camping) in current area.If determine that in step 961 this sub-district is not subjected to the restriction of system information, then UE reselects the sub-district of highest ranking in step 962.This system information can be PLMN (public-land mobile network) ID, forbidding LA (this area) or cell status.Yet, if determine that in step 961 this sub-district is subjected to the restriction of system information, if determine that in step 951 this highest ranking sub-district does not correspond to this frequency information/cell information, if perhaps determine not exist the sub-district of satisfying the S standard in step 941, then UE rests in the current area, reselects and needn't carry out the sub-district that is used for the MBMS business.

Be appreciated that from the above description, when sub-district that the specific cluster data service can be used and the disabled sub-district of this Packet data service are overlapping in the same area, the present invention with this Packet data service can with the radio resource information of sub-district send to the UE that is arranged in this disabled sub-district of Packet data service, this Packet data service is provided thus effectively.In addition, the present invention will send to UE about the information of neighbor cell and the information of relevant Serving cell, and the mobility and the efficient cell that help UE are thus selected.

Although illustrate and described the present invention with reference to its certain preferred embodiment, but those of ordinary skills should understand under the situation of the spirit and scope of the present invention that do not break away from the claims qualification, can carry out the various changes of form and details here.

Claims

1. one kind is used for having the sub-district being selected to can be used for the MBMS business by user equipment (UE) in the mobile communication system of FA of a plurality of multimedia broadcast/group broadcast service MBMS among the Frequency Distribution FA that overlaps each other to receive the method for MBMS business at the same area, and the method comprising the steps of:

By radio network controller RNC the MBMS offset information is sent to UE, this MBMS offset information is supported the preferred frequency band priority of MBMS business;

Determine by UE whether current area can be used for the MBMS business; With

If current area is not useable for the MBMS business, then reselects predefined formula for the sub-district and carry out the sub-district and reselect by the MBMS offset information is applied to by UE; With

From the sub-district of reselecting, receive the MBMS business.

2. send this MBMS offset information according to the process of claim 1 wherein by each system information of subdistricts piece SIB.

3. according to the process of claim 1 wherein that the MBMS dedicated system block of information SIB by each sub-district sends the MBMS offset information.

4. according to the method for claim 3, wherein the special-purpose SIB of this MBMS also comprises the information whether Serving cell that UE is positioned at can be used for MBMS that indicates.

5. according to the process of claim 1 wherein that this UE utilizes MBMS to be offset the sub-district of carrying out the neighbor cell with limit priority and reselects.

6. according to the process of claim 1 wherein

RNC also will, indicate the identification information whether neighbor cell can be used for this MBMS and send to UE.

7. according to the method for claim 6, wherein this identification information comprises the cell information of the main scrambler that indicates the Primary Common Pilot Channel P-CPICH that is used for the MBMS sub-district.

8. according to the method for claim 6, wherein this identification information is sent separately at each sub-district by BCCH channel of broadcast control.

9. method according to Claim 8, wherein after adding this MBMS, this UE carries out the sub-district of MBMS sub-district and reselects.

10. according to the method for claim 6, wherein this identification information is sent separately for each MBMS by MBMS control channel MCCH.

11. one kind is used for having in the mobile communication system of FA of a plurality of multimedia broadcast/group broadcast service MBMS of support among the Frequency Distribution FA that overlaps each other by user equipment (UE) at the same area and carries out the method that the sub-district of preferred frequency band is reselected, the method comprising the steps of:

From radio network controller RNC receive comprise MBMS task identifier ID, about the message of the information of the optimized frequency of MBMS business and MBMS offset information to support the preferred frequency band priority of MBMS;

Utilize the information that comprises in this message and carry out inter-frequency measurements; With

If the received power of preferred frequency band that is used for the MBMS sub-district is than the received power height of the frequency band that is used for current area, then carries out the sub-district and reselect by executing the MBMS offset information.

12. according to the method for claim 11, wherein UE receives this information by the notification message before beginning in the MBMS session, carries out inter-frequency measurements based on this notification message, and the sub-district of carrying out this preferred frequency band is reselected.

13. according to the method for claim 11, wherein this UE periodically receives the control messages that comprises this information of MBMS session after beginning, and carries out inter-frequency measurements based on this control messages, and the sub-district of carrying out this preferred frequency band is reselected.

14. according to the method for claim 11, wherein when the MBMS session well afoot that is used for MBMS and UE had selected new sub-district, UE carried out inter-frequency measurements from the notification message of new sub-district receiving cycle transmission and based on this notification message.

15. according to the method for claim 14, if wherein the frequency band of determining selected sub-district according to this notification message is corresponding to preferred frequency band, then UE carries out the sub-district and reselects.

16. according to the method for claim 14, if wherein determine that according to this notification message the frequency band of selected sub-district does not correspond to preferred frequency band, then UE rests in the Serving cell and from Serving cell and receives MBMS.

17. according to the method for claim 11, wherein this UE measures the received power of neighbor cell, and if at least one neighbor cell that exists this MBMS to use, then carry out the sub-district of the higher neighbor cell of received power and reselect.