WO2011079646A1

WO2011079646A1 - Method and device for sending update indication information of multicast control channel

Info

Publication number: WO2011079646A1
Application number: PCT/CN2010/078338
Authority: WO
Inventors: 苟伟; 马子江
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-12-31
Filing date: 2010-11-02
Publication date: 2011-07-07
Also published as: CN102118693A; CN102118693B

Abstract

The present invention discloses a method and device for sending update indication information of Multicast Control Channel (MCCH), wherein the method includes: selecting the MCCH of one Multimedia Broadcast and multicast service Single Frequency Network (MBSFN) area from the current multiple MBSFN areas to which a cell belongs; and sending MCCH update indication information of the cell by bearing it on some or all of the radio frames on which the MCCH is borne. The present invention can enable transmission of MCCH update indication information.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method and an apparatus for transmitting a multicast control channel (MCCH) update indication information. BACKGROUND OF THE INVENTION Due to the large amount of data, long duration, and delay sensitivity of mobile data multimedia services and high bandwidth multimedia services, in order to effectively utilize mobile network resources, the 3rd Generation Partnership Project (3GPP) is referred to as 3GPP. A multimedia broadcast and multicast service (MBMS) is proposed, which is a technology for transmitting data from one data source to multiple targets, and implements a network (including a core network and an access network). The sharing of resources increases the utilization of network resources (especially air interface resources). The MBMS service defined by 3GPP can not only realize message-like multicast and wide-text of pure text rate, but also realize broadcast and multicast of high-speed multimedia services, and provide a variety of rich video, audio and multimedia services. The scheduling and control signaling configuration of the MBMS service is semi-static, that is, the scheduling information and control signaling information of the MBMS service are all large due to the large amount of data of the MBMS service, the long duration of the terminal reception, and the constant average data rate. The "long-term" remains unchanged. Therefore, for multiple MCCH messages, the system side often sends an unchanged MCCH message because new users may be accessed at any time. This is not necessary for a terminal that has received the MCCH message, and since the MCCH information is large, the receiving and parsing process consumes power. Therefore, each time the MCCH is received, the terminal power is wasted. In view of the above problem, the prior art proposes to add an MCCH message update indication information (the update indication information may be referred to as an MBMS communication message or MCCH notification information or MCCH change notification information (MCCH change notification, or MCCH change notification, or MCCH). The notification indication)), the update indication information uses a small amount of information to describe whether the MCCH information has changed. For the terminal that has already accessed, only the MCCH message update indication information needs to be monitored, and the indication of the MCCH message update indication information is determined to determine whether to receive. System side MCCH information. Currently, LTE 9 is determined using only the multimedia broadcast multicast service single frequency network (Multimedia Broadcast multicast service Single Frequency Network , abbreviated as MBS FN) Sub ^{^1]} Chen MCCH update indication information carrier, but did not give a specific indication to determine updated MCCH The parameters of the information, the method of using the parameters, the range of values, and the like, in particular, how to determine the location of the information under the MCCH update indication in the scenario of overlapping coverage of the MBSFN area, the present invention provides a solution to the above problem. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method and apparatus for transmitting MCCH update indication information to at least solve the above problems. According to an aspect of the present invention, a method for transmitting MCCH update indication information is provided, including: selecting an MBSFN area i in which a cell is currently located or an MCCH of an MBSFN area i or a medium; an MCCH update indication information of the cell The bearer is transmitted on part or all of the radio frames where the MCCH is located. Further, transmitting the MCCH update indication information of the foregoing cell to the radio frame where the MCCH is located to transmit includes: determining, according to the following equation, a system radio frame number SFN of the radio frame carrying the MCCH update indication information:

SFN mod (modificatioinPeriod/notificationRepetionCoeff)=notificationOffset, where modificationPeriod is the MCCH change period of the above MCCH; notificationRepetitionCoefr is the number of times the MCCH update indication information is sent in one MCCH modification period, and the value set is {2, 4, 8, 16, 32} or any subset thereof; the notificationOffset is an integer greater than or equal to 0; the MCCH update indication information is carried on the radio frame corresponding to the determined system radio frame number. Further, in the above equation, the value of the notificationRepetitionCoeff satisfies: notificationRepetitionCoeff <modifiedPeriod/repetitionPeriod, where the repetitionPeriod is the transmission period of the MCCH described above. Further, the set of ear values of the notificationOffset is { 0 , 1, 2, 3 , ..., 10 }. Further, the notificationOffset is equal to the value of the offset parameter carried in the configuration signaling of the radio frame carrying the MCCH. Further, the notificationOffset is greater than the value of the offset parameter carried in the configuration signaling of the radio frame in which the MCCH is configured. Further, if the cell is in the coverage of the N MBSFN areas, where N > 1, N is an integer, then selecting the MCCH of one MBSFN area in the MBSFN area includes: selecting the MCCH in the N MBSFN areas, the minimum tampering period One of the MBSFN areas i or , where M < N, M is an integer; calculate the M MBSFN areas: t or the ratio of each of the MBSFN areas t or the modificationPeriod/repetitionPeriod; 4 calculate the calculated ratio as a set, calculate The intersection of the set and the set of values of the notificationRepetitionCoeff; the MCCH corresponding to the MBSFN area ₁ corresponding to one ear value of the calculated intersection. Preferably, if the calculated value of the plurality of intersection, the intersection of the selected MBSFN area to the calculated value corresponding to a corresponding MCCH comprising: selecting the maximum value of the ratio of the intersection corresponding to the MBSFN area ₁ Corresponding MCCH. Further, the MCCH update indication information of the cell is transmitted on the radio frame, and the at least one of the following is sent: the MCCH update indication information is sent in a subframe where the MCCH is located in the radio frame; and the MCCH update indication information is carried in the Transmitting in a predetermined subframe within the radio frame; transmitting the MCCH update indication information in a subframe within the radio frame, and transmitting indication information indicating a subframe carrying the MCCH update indication information. Preferably, the transmitting the MCCH update indication information on the subframe in which the MCCH is located in the radio frame comprises: transmitting the MCCH update indication information on the first subframe where the MCCH is located in the radio frame. Preferably, the indication information indicating the subframe that carries the MCCH update indication information includes: a bitmap or a subframe number. Preferably, the MCCH of the MBMS single frequency network MBSFN area i or the one of the MBSFN areas in which the selected cell is currently located includes one of the following: When there is a single MCCH with the smallest modification period in the MCCH, the MCCH with the smallest 4 tampering period is selected. When there are multiple MCCHs with the smallest tampering period in the MCCH, and there is a single repetition period with the smallest MCCH with the smallest modification period When the MCCH is selected, the MCCH with the smallest repetition period is selected. When there are multiple MCCHs with the smallest modification period in the MCCH, and there are multiple MCCHs with the smallest repetition period in the MCCH with the smallest modification period, the multiple repetition periods are selected. One MCCH in the MCCH. Preferably, selecting one of the plurality of MCCHs with the smallest repetition period is: selecting the first MCCH or the last MCCH in the configuration list according to the configuration list in the system information block 13. According to another aspect of the present invention, a device for transmitting MCCH update indication information is provided, including: a selection module and a sending module. The selecting module is configured to select an MCCH of an MBSFN area in the MBSFN area where the cell is currently located, and the sending module is configured to carry the MCCH update indication information of the cell in a part or all of the radio frames where the MCCH selected by the selecting module is located. send. The sending module includes: a determining submodule, configured to determine, according to the following equation, a system radio frame number SFN of the radio frame carrying the MCCH update indication information: SFN mod (modificatioinPeriod/notificationRepetionCoeff)=notificationOffset, where the modificationPeriod is the MCCH of the MCCH The modification period; notificationRepetitionCoefr is the number of times the MCCH update indication information is sent in an MCCH 4 tampering period, and the value set is {2, 4, 8, 16, 32} or any subset thereof; the notificationOffset value is greater than or equal to 0. The transmitting submodule is configured to send the MCCH update indication information on the determined radio frame corresponding to the system radio frame number. The foregoing selecting module includes: a first selecting submodule, configured to select M MBSFN areas in which the MC is currently located or in which the MCCH has the smallest MCCHN period, where N > 1 , N and M are integers And ^1 ≤ the first calculation sub-module, configured to calculate a ratio of each of the MBSFN areas i and the modificationPeriod/repetitionPeriod of the MBSFN area i; the second calculation sub-module, configured to use the calculated ratio as a set, The intersection of the set and the value set of the notificationRepetitionCoefr is calculated; the second selection sub-module is configured to select the MBSFN area i or the MCCH corresponding to one of the calculated intersections. According to the present invention, the radio frame carrying the MCCH update indication information of the cell is determined according to the radio frame of the MCCH of the MBSFN area in which the cell is currently located, and the wireless device that cannot effectively determine the MCCH update indication information in the prior art is solved. The problem of the frame, so that the MCCH update indication information can be transmitted. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a flowchart of a method for transmitting MCCH update indication information according to an embodiment of the present invention; FIG. 2 is a schematic diagram of MBSFN area i or overlapping coverage; FIG. 3 is a schematic diagram of MCCH in Embodiment 1 of the present invention; FIG. 4 is a schematic diagram of the MCCH update indication information transmission period being r£256 according to the first embodiment of the present invention; FIG. 5 is an MCCH update indication information transmission according to Embodiment 2 of the present invention; FIG. 6 is a schematic structural diagram of a device for transmitting MCCH update indication information according to an embodiment of the present invention; FIG. 7 is a schematic structural diagram of a device for transmitting MCCH update indication information according to a preferred embodiment of the present invention; A schematic structural diagram of a transmitting apparatus of MCCH update indication information according to another preferred embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. FIG. 1 is a flowchart of a method for sending MCCH update indication information according to an embodiment of the present invention. As shown in FIG. 1, the method mainly includes the following steps! ^ (Step S 102 - Step 4 gather S 104 ): Step S102: Select an MCCH of the MBSFN area i or one of the MBSFN areas in which the cell is currently located. In a specific application, the cell that does not overlap the coverage of the MBSFN area (that is, the cell that is within the coverage of the single MBSFN area) may be used. The location of the MCCH update indication information may be determined, and the location of the MCCH update indication information may also be determined in a cell in which MBSFN area overlap coverage occurs (i.e., a cell that is within coverage of multiple MBSFN areas, as shown in FIG. 2). Therefore, in the embodiment of the present invention, for a cell covered by a single MBSFN area, the MCCH of the MBSFN area is selected in step S102; for a cell covered by multiple MBSFN areas, in step S102, from multiple MBSFNs Select an MBSFN area in the area, and obtain information about the MBSFN area; t or MCCH. For example, in FIG. 2, the MCCH of the MBSFN2 zone t or may be selected, or the MBSFN1 zone t or the MBSFN3 zone i or the MCCH may be selected. Step S104: The MCCH update indication information of the cell is transmitted on part or all of the radio frames in which the MCCH selected in step S102 is located. With the above method of the embodiment of the present invention, the MCCH update indication information 7| can be transmitted on the radio frame where the MCCHN area or the MCCH where the cell is currently located is located, thereby solving the problem that the MCCH update indication information cannot be effectively determined. The problem of the radio frame, thereby implementing the transmission of the MCCH update indication information. In LTE, the radio frame carrying the MCCH (ie, the radio frame where the MCCH is located) can be determined according to the following equation: SFN mod repetionPeriod = Offset (1) In Equation 1, the repetitionPeriod is a period describing the period of the MCCH period transmission. That is, the repetition period of the MCCH or the transmission period called MCCH is taken as one of {rB2, rf64, rfl28, r£256}, where rfi2 represents the length of 32 radio frames, and the length of one radio frame in LTE 10ms, other similar; SFN is the system frame number, offset is the parameter describing the offset, which can take one of the values {0, 1, 10}. In the specific application, the configuration parameters repetitionPeriod and offset can be used to determine the bearer MCCH. SFN. The radio frame corresponding to the SFN value of Equation 1 is the radio frame carrying the MCCH. And, in LTE, you can define the MCCH change cycle for each MCCH.

(ModificationPeriod) size, MCCH tampering period can be one of {rf512, rfl024}. The boundary of the MCCH change period is defined by the SFN value satisfying the equation SFN mod m=0. The same MCCH information is sent at each MCCH repetition period opportunity within the MCCH modification period, and only the MCCH information after the MCCH f tampering period boundary opportunity is allowed to be updated. Where rf512 represents the length of 512 radio frames, and the length of one radio frame in LTE is 10ms, and the like. Specifically, the system radio frame number (SFN) of the radio frame carrying the MCCH update indication information may be determined by the following equation:

SFN mod (modificatioinPeriod/notificationRepetionCoeff)=notificationOfFset where notificationRepetitionCoeff is the number of times the MCCH update indication information is sent in one MCCH modification period of the MCCH selected in step S102 above, and the value set of notificationRepetitionCoeff may be {2, 4, 8 , 16, 32} or any subset thereof, that is, the parameter can take one of {2, 4, 8, 16, 32}, or one of {2, 4, 8, 16}, or take {2 , one of 4}, or one of the other subsets of the set {2, 4, 8, 16, 32}; and the notificationOffset takes an integer greater than or equal to zero. Preferably, the notificationRepetitionCoeff parameter value should satisfy the notificationRepetitionCoeff - modificationPeriod/repetitionPeriod, that is, the number of MCCH update indication information included in one MCCH modification period is less than or equal to the number of MCCH repetition periods; and, in practical applications, notificationOffset The set of values can be {0, 1, 2, 3... 10}, that is, the notificationOffset can be any value of {0, 1 , 2, 3... 10}. Preferably, the value of each parameter in Equation 2 can be determined according to the value of each parameter in Equation 1. In an actual application, for a cell in an area where MBSFN overlap coverage does not occur, that is, only one MBSFN area is covered. The cell, the cell will send configuration signaling for carrying the MCCH radio frame (current MCCH radio frame configuration signaling is carried on the system information block 13 (SIB 13)), that is, the repetitionPeriod and the offset parameter in the above equation are sent. The value, where the repetitionPeriod is a description of the MCCH repetition period, that is, the MCCH transmission period, will also send the value of the parameter modificationPeriod describing the MCCH modification period. For a cell in which N (N is an integer greater than 1) overlapping coverage of the MBSFN area, when the cell sends configuration signaling for carrying the MCCH radio frame, the radio frame carrying the MCCH is configured for each MBSFN area, that is, N configuration letters are sent. Therefore, each configuration signaling carries configuration information of each MCCH, that is, {repetitionPeriod ¹ , offset ¹ , modificationPeriod ¹ }, {repetitionPeriod ² , offset ² modificationPeriod ² } ... {repetitionPeriod ^N , offset ^N , modificationPeriod ^N } parameters. When the radio frame that sends the MCCH update indication information is determined in the cell, the value of each parameter in Equation 2 is determined according to the parameter carried in the configuration signaling of the MCCH selected in step S102, where the value of the notificationOffset may be It is greater than the value of the offset in the configuration of the radio frame of the MCCH selected in step S102. Alternatively, the notificationOffset may be equal to the value of the offset in Equation 1. Preferably, the notificationOffset may be selected to be equal to the offset value of the offset in Equation 1. For the notificationRepetitionCoeff parameter, the ratio of the modificationPeriod/repetitionPeriod of the MCCH selected in step S102 may be selected to be less than or equal to the value of the modification. After the notificationRepetitionCoeff and notificationOffset are determined, according to the modificationPeriod of the selected MCCH, the radio frame carrying the MCCH update indication information can be determined by using the equation (2), that is, the radio frame bearer corresponding to the SF satisfying the equation (2) is adopted. MCCH update indication information. In a specific application, for a cell in which N (N is an integer greater than 1) overlapping coverage of MBSFN areas, one MBSFN area may be selected from the N MBSFN areas in the following manner: Step 1: Select MCCH change period in N MBSFN areas The minimum M MBSFN areas, that is, the MBSFN area in which the modificationPeriod takes the most value of the above-mentioned N sets of parameters, where M≤N; Step 2, calculates the ratio of the modificationPeriod/repetitionPeriod of each MBSFN area in the above M MBSFN areas. (There may be more than one or only one), the calculated ratios are taken as a set; Step 3, the set obtained in step 2 and the set of notificationRepetitionCoeff (ie the above {2, 4, 8, 16, 32} or Any subset thereof is used as an intersection to obtain a new set of values of the notificationRepetitionCoeff parameter. Step 4: Select a MCCH corresponding to the MBSFN region corresponding to the value from the new set obtained in step 3. In a specific application, if the new set obtained in step 3 has multiple ratios, it is preferable to select the MCCH corresponding to the MBSFN area corresponding to the ratio with the largest value in the set. If there are multiple ratios with the largest value, then choose one of them arbitrarily, or select these among the SIB 13 The one with the highest order appears. In a specific implementation process, for a cell in which N (N is an integer greater than 1) overlapping coverage of MBSFN areas, when determining a radio frame carrying MCCH update indication information, it may also select each parameter in Equation 2 simultaneously. MCCH of one of the N MBSFN areas. Specifically, when determining the radio frame carrying the MCCH update indication information, the modificationPeriod parameter in Equation 2 is: selecting the minimum value of the modificationPeriod in the above N sets of parameters for Equation 2; the notificationRepetitionCoeff parameter in Equation 2 is taken The values are as follows: Select the minimum value of the modificationPeriod corresponding to the MBSFN area i or, for these MBSFN areas t or calculate the ratio of the respective modificationPeriod / repetitionPeriod (possibly multiple or only one), treat the resulting ratio as a set, and notifyRepetitionCoeff The value can be regarded as a set, and then the intersection of the two sets is used as the new value set of the notificationRepetitionCoeff parameter. If the new set has multiple values at this time, preferably, the largest value is selected as the value of the notificationRepetitionCoeff parameter ( notificationRepetitionCoeff The value of the parameter ear is actually calculated by the modificationPeriod and the repetitionPeriod of a certain MBSFN area. For the convenience of description, the MBSFN area is MBSFN-A. If there is more than one ratio, then Select one of them arbitrarily, or select one of them in the SIB13. The value of the notificationOffset parameter in Equation 2 is as follows: Select the value of the offset in the MBSFN-A area as the value of the notificationOffset parameter, or You can also select the offset of the offsetOffset value set that is larger than the offset in the MBSFN-A area. Here, it is described in detail that in a specific application, for a cell in which N (N is an integer greater than 1) overlapping coverage of MBSFN regions, one of N MBSFN regions may be selected in the following manner.

MBSFN area t or MCCH. Since each MCCH and each MBSFN area are corresponding, the following description is directly described by MCCH, which means MCCH of a certain MBSFN area: Step 1, select the MCCH with the smallest modification period among the N MCCHs (for convenience) Description, the MCCH selected this time is recorded as MCCH_ minMP). If there is only one MCCH, the MCCH can be directly selected. If there are multiple MCCH_minMP, continue to step 2; Step 2, from the minimum 4 In the MCCH of the tampering period, the MCCH with the smallest repetition period is selected from the MCCH_minMP (for the convenience of description, the MCCH selected this time is recorded as MCCH minRP). If the MCCH-minRP has only one MCCH, the MCCH is selected. If the MCCH_minRP has multiple MCCHs, proceed to step 3; Step 3: Select any one of MCCH_minR. For specific applications, preferably, according to the order of the MCCHs configured in the system information block 13, the MCCH-minRP may be selected from the MCCH-minRP in the last or first MCCH. . After determining the location of the radio frame transmitting the MCCH update indication information, it may be further determined which subframes within the radio frame are to upload the MCCH update indication information. Specifically, the method for carrying the MCCH update indication information in the determined radio frame includes but is not limited to the following:

(1) The MCCH update indication information is carried in the subframe in which the MCCH is carried in the foregoing radio frame; preferably, the MCCH update indication information may be sent in the first subframe that carries the MCCH, and of course, other subframes carrying the MCCH may also be used. Transmitting the MCCH update indication information; (2) using the fixed subframe of the foregoing radio frame to carry the MCCH update indication information by using the protocol, that is, the MCCH update indication information is sent on a predetermined subframe in the radio frame;

(3) carrying the MCCH update indication information in any subframe in the radio frame, and indicating a subframe carrying the MCCH update indication information by using a bitmap, or transmitting a subframe carrying the MCCH update indication information. The subframe number. If a subframe is used to indicate the subframe carrying the MCCH update indication information, a 6-bit bitmap may be used to indicate. For the FDD mode, each bit of the bitmap corresponds to the indication subframes #1, #2, #3, #6, #Ί, , When the corresponding bit position is "1", it means that the subframe is selected as the subframe carrying the MCCH update indication information. For the TDD mode, the corresponding bits of the bitmap correspond to the indications #0, #1, #5 If the sub-frames other than the #6 sub-frames are used, if the sub-frame number is used, the three-bit indication can be used. The six types of values are used to describe the six sub-frames. In the FDD mode, the "001" indicates the sub-frame. 1 , "010" indicates subframe #2, "011" indicates subframe #3, "100" indicates subframe #6, "101" indicates subframe #7, "110" indicates subframe #8; in TDD mode Next, "001" indicates subframe #3, "010" indicates subframe #4, "011" indicates subframe #7, "100" indicates subframe #8, "101" indicates subframe #9. It should be noted that, in the embodiment of the present invention, the above equations (1) and (2) are counted in units of radio frames, and each parameter in the equation calculation is in units of radio frames. In order to better illustrate the invention, the following description is made in conjunction with the embodiments. Embodiment 1 This embodiment describes a scenario in which a single MBSFN area is covered. It is assumed that an 'h zone belongs to only one MBSFN area, and the MCCH Repetition Period (abbreviated as RepetitionPeriod) and the MCCH Modification Period (MCCH ModificationPeriod, abbreviated as ModificationPeriod) and the offset are determined as follows:

RepetitionPeriod = rfl 28, offset=0 , ModificationPeriod =rf512. The radio frame corresponding to the SFN that satisfies the equation (1) is the radio frame carrying the MCCH, and the repetitionPeriod is the RepetitionPeriod in the embodiment. Rfl28, the offset ear has a value of 0. That is, the radio frame corresponding to the SFN value satisfying the SFN mod rfl28 = 0 is the radio frame carrying the MCCH, and the radio frame with the SFN ear value of 0, 128, 256, 384, 512... can be known according to the set parameters. The MCCH is carried in. The value of SFN is specified in LTE as 0~1023, and the cycle is cyclic. Further, in this embodiment, it is assumed that the MCCH modification period is rf512, and the radio frame carrying the MCCH update indication information is determined by these parameters. The following describes how to determine that the MCCH update indication message 7 is contained in the radio frame carrying the MCCH.

(1) Determine the value of notificationRepetitionCoeff, which should satisfy: notificationRepetitionCoeff≤ modificationPeriod/ repetitionPeriod. In this embodiment, the ratio of modificationPeriod/repeatingPeriod is 4. In this embodiment, the value set of notificationRepetitionCoeff is {2, 4, 8, 16}. Therefore, the value of notificationRepetitionCoeff can be 2 or 4. In this embodiment, 4 is selected, and the MCCH update indication can be determined by the ratio of modificationPeriod /notificationRepetitionCoeff. If the notificationRepetitionCoeff value is 4, the transmission period of the MCCH update indication information is rfl28, that is, rf512/4=rfl28, as shown in FIG. 3. If notificationRepetitionCoeff is set to 2, the MCCH update indication message is sent to rf256, that is, r 12/2=rf256, and the schematic diagram of the target: 3⁄4 port is shown in Figure 4.

(2) Determine the value of notificationOffset. Since only one MBSFN area is separately covered in this embodiment, there is only one MCCH. Therefore, there is only one set of parameters for determining the MCCH radio frame, that is, RepetitionPeriod = rfl28, offset=0, ModificationPeriod described above. =r£512, then notificationOffset can take the same value as offset, which is 0. The value of the modificationPeriod parameter in equation (2) is the value of ModificationPeriod, which is rf512. This is because there is only one MBSFN area coverage, only one MCCH modification period, so only rf512 can be taken. When there are multiple MBSFN areas, modificationPeriod takes the smallest MCCH tampering period.

(3) Determining that the SFN value of the above equation (2) is satisfied, and the radio frame corresponding to the SFN value is a radio frame carrying the MCCH update indication information. If the notificationRepetitionCoeff takes a value of 4, the SFN that satisfies SFN mod ( rf512/4 ) = 0 has the following values: 0, 128, 256, 384, 512... It can be seen from the value of the SFN that the system frame number carrying the MCCH update indication information is the same as the system frame number of the bearer MCCH, that is, all the radio frames carrying the MCCH are used to carry the MCCH update indication information. If the notificationRepetitionCoeff takes a value of 2, the value of the SFN that satisfies SFN mod ( rf512/4 ) = 0 includes: 0, 256, 512.... In this case, a portion of the radio frame carrying the MCCH is used to carry the MCCH update indication information. Embodiment 2 This embodiment describes an application in which one cell is overlapped by three MBSFN areas at the same time. Let a certain 'zone' be overlapped by three MBSFN areas at the same time, and record them as MBSFN 1, MBSFN2 and MBSFN3 respectively. Then, the MCCH repetition period, the MCCH modification period, and the offset of each MBSFN area are determined by 3⁄4P:

MBSFN 1 or, RepetitionPeriod = rfl28, offset=0, ModificationPeriod = rf512. The radio frame corresponding to the SFN that satisfies the equation: SFN mod repetitionPeriod = offset is the radio frame carrying the MCCH1 in the following manner. In this embodiment, the repetitionPeriod is supported in this embodiment. For the RepetitionPeriod, the value is rfl28, and the offset ear value is 0. That is, the radio frame corresponding to the SFN value of SFN mod rfl28 = 0 is the radio frame carrying the MCCH1, and the SFN value can be obtained according to the set parameters. The radio frame of 128, 256, 384, 512, ... carries MCCH1. Here, the value of SFN is specified in LTE as 0~1023, and the cycle is cyclic. Further, in this embodiment, it is assumed that the MCCH1 modification period is rf512. Then, the radio frame carrying the MCCH update indication information can be determined by using these parameters.

MBSFN2 area i or , epetitionPeriod = rf64 , offset=l , ModificationPeriod = r£512. The radio frame carrying MCCH2 is determined by the following method, and the equation is satisfied: SFN mod The radio frame corresponding to the SFN of the repetitionPeriod=offset is the radio frame carrying the MCCH2. In this embodiment, i sets the repetitionPeriod to RepetitionPeriod, the value rf64, and the offset value is 1. That is, the radio frame corresponding to the SFN value satisfying the SFN mod rf64 = 1 is the radio frame carrying the MCCH2, and the parameters set by the MNN can be learned as the wireless values of the SFN values 1, 65, 129, 193, 257... MCCH2 is carried in the frame. Here, the value of SFN is specified in LTE as 0 to 1023, and the cycle is cyclic. Further, in this embodiment, if the MCCH2 modification period is rf512, the radio frame carrying the MCCH update indication information is determined by using these parameters.

MBSFN3 area; t or, RepetitionPeriod = r£256, offset=5, ModificationPeriod =rf!024. Then, the radio frame of the MCCH3 is determined by the following method, and the radio frame corresponding to the SFN of the S FN mod repetitionPeriod = offset is the radio frame carrying the MCCH3. In this embodiment, the repetitionPeriod is RepetitionPeriod, and the value r is £256, offset is 5. That is, the radio frame corresponding to the SFN value of SFN mod rf256 = 5 is the radio frame carrying the MCCH3, and the parameters of the SFN can be obtained according to the set parameters as 5, 261, 517, 773, 5. The wireless frame (the SFN ear is cycled at 1023 cycles) carries MCCH3. Here, the ear value of the SFN is specified as 0 to 1023 in LTE, and the cycle is cyclic. Further, in this embodiment, it is assumed that the MCCH3 modification period is rfl024, and the radio frame of the MCCH update indication information is determined by these parameters. The following describes how to determine to carry the MCCH update indication information in the radio frame carrying the MCCH. A radio frame in which an appropriate MCCH is located is selected in MCCH1, MCCH2, and MCCH3 to carry MCCH update indication information. Determine the value of notificationRepetitionCoef. The notificationRepetitionCoeff is to take a reasonable value from a set. According to the equation of the invention, the notificationRepetitionCoeff - modificationPeriod/repetitionPeriod determines a reasonable range of the value of the notificationRepetitionCoeff, and selects one of the values satisfying the equation. In this embodiment, the modificationPeriod in the notificationRepetitionCoeff - modificationPeriod/repetitionPeriod equation takes the minimum value of the MCCH change period in the three MBSFN areas, that is, rf512, and the repetitionPeriod takes the MBSFN area i or the repetitionPeriod parameter corresponding to the modificationPeriod=rf512. The value of the ear is again. If the modificationPeriod=r£512 corresponds to multiple MBSFNs, select the one with the smallest value of the repetitionPeriod. In this embodiment, modificationPeriod=rf512 has two MBSFN areas i or respectively, corresponding to MBSFN 1 and MBSFN2, wherein MBSFN 1's repetitionPeriod=rfl28 and MBSFN2's repetitionPeriod=rf64 select MBSFN2's repetitionPeriod ear value. Thus, the ratio of modificationPeriod/repetitionPeriod is 8. The punch is given in accordance with an embodiment of the present invention In the present embodiment, only one preferred set of the set given in the present invention is selected as an instance, and other sets are similarly applied. The set of the value of the notificationRepetitionCoeff in this embodiment is {2, 4, 8, 16 }. Further, after the above-described equality constraint is imposed, the value that can be selected by the notificationRepetitionCoeff is 2 or 4 or 8, and preferably takes a value of 8, but other values can also be selected. In this embodiment, 4 is selected, and the new indication information is sent. For the period, the transmission period of the MCCH update indication information is rfl28, that is, rf512/4=rfl28, as shown in FIG. 5. Determine the ear value of notificationOffset. Since there are three MBSFN area overlapping coverages in this embodiment, and the parameter of the MBSFN2 area has been selected when determining the notificationRepetitionCoeff parameter, the notificationOffset also selects the offset parameter value of MBSFN2, which is 1. Then, the SFN value that satisfies the above equation (1) is determined, and the radio frame corresponding to the SFN value is the radio frame that carries the MCCH update indication information. SFN mod ( rf512/4 ) = 1, the ear value of the SFN satisfying the equation includes: 1, 129, 257, 385, 513... The system frame number of the SFN can be determined that the system frame number of the MCCH update indication information is the same as the part system frame number of the MCCHN2 area or the MCCH of the MBSFN2 area, that is, the MCSFN2 area or the MCCH of the MBSFN2 area. The system frame numbers are 1, 65, 129, 193, 257, 321, 385, 449, 513..., and the system frame numbers carrying the MCCH update indication information are 1, 129, 257, 385, 513. As can be seen from the comparison, the system frame number of the MCCH update indication information is completely included in the system frame number of the MCCH in the MBSFN2 area. Thereby, the wireless frame using the partially carried MCCH is used to carry the MCCH update indication information. Embodiment 3 This embodiment provides a specific application manner. Compared with Embodiment 2, this embodiment can save some steps and is easier to implement. For a cell in which N (N is an integer greater than 1) MBSFN area overlap coverage, one MBSFN area i or MCCH may be quickly selected from N MBSFN areas or in the following manner. Since each MCCH and each MBSFN area are - corresponding, the following description is directly described in the MCCH, and the words such as the MCCH of a certain MBSFN area are omitted. Step 1: Select the MCCH with the smallest modification period among the N MCCHs (for the convenience of description, we record the MCCH selected this time as MCCH_minMP), if there is only one MCCH, Then, the MCCH can be selected. If there are multiple MCCH_minMPs, proceed to step 2; Step 2, select the MCCH with the smallest repetition period from the MCCH with the smallest modification period, that is, from the MCCH_minMP (for convenience of description) The MCCH selected in this time is recorded as MCCH minRP). If the MCCH-minRP has only one MCCH, the MCCH can be selected. If the MCCH minRP has multiple MCCHs, continue to step 4; Step 3: Any one of MCCH-minRP is selected. For specific applications, preferably, according to the position sequence of the MCCH configured in the system information block 13, the MCCH-minRP is selected from the MCCH-minRP in the last or first MCCH. After the MCCH is selected, the value of the notificationOfFset is equal to the value of the Offset in the selected MCCH configuration parameter, and the value of the notificationOffset is no longer sent to the receiving end. Then, the value of the notificationRepetitionCoeff is: Calculate the ratio of the modification period of the MCCH to the repetition period, and select a value less than or equal to the ratio in the value set of notificationRepetitionCoeff (#the MCCH modification period specified by the existing protocol is taken The value set and the MCCH repetition period value set, and the notificationRepetitionCoeff value set given in the present invention, can determine the existence of the value), and send the value to the receiving end. The radio frame carrying the MCCH update indication information is then calculated according to equation (2). Such selection can ensure that the number of transmissions of the MCCH update indication information in one MCCH modification period is maximized. If the tampering period is larger, the MCCH update indication information is sent in the modification period. The selection of the subframe level uses the subframe selection mode of the implementation second, and details are not described herein. Next, a transmitting apparatus of MCCH update indication information according to an embodiment of the present invention will be described. FIG. 6 is a schematic structural diagram of an apparatus for sending MCCH update indication information according to an embodiment of the present invention. As shown in FIG. 6, the apparatus mainly includes: a selection module 60, configured to select an MBSFN area i or a medium MBSFN where a cell is currently located. The MCCH of the area t or the sending module 62, the MCCH update indication information for the cell is sent on the radio frame where the MCCH selected by the selecting module 60 is located. FIG. 7 is a schematic structural diagram of a device for transmitting MCCH update indication information according to a preferred embodiment of the present invention. In a specific implementation process, a radio frame that sends MCCH update indication information may be all or part of a radio frame where the MCCH is located, and Module 62 can pass the above equation (2) Determining the system radio frame number (SFN) of the radio frame transmitting the MCCH update indication information. Therefore, as shown in FIG. 7, the transmitting module 62 may include: a determining submodule 620 and a transmitting submodule 622. wherein the determining submodule 620 is used to Determining a radio frame carrying MCCH update indication information according to the following equation

SFN: SFN mod (modificatioinPeriod/notificationRepetionCoeff)=notificationOffset, where modificationPeriod is the MCCH 4 tampering period of the MCCH selected by the selection module 60; the notificationRepetitionCoeff is the number of times the MCCH update indication information is sent in one MCCH modification period, and the value set is The value of the notificationOfFset is an integer greater than or equal to 0; the sending sub-module 622 is configured to carry the MCCH update indication information in the SFN determined by the determining sub-module 620. Send on the corresponding radio frame. FIG. 8 is a schematic structural diagram of an apparatus for transmitting MCCH update indication information according to another preferred embodiment of the present invention. When a cell is in a coverage range of N (N is an integer greater than 1) MBSFN areas, the selection module 60 needs to The MCCH of the MBSFN area is selected in the N MBSFN areas. Therefore, as shown in FIG. 8, in the preferred embodiment, the selecting module 60 may include: a first selecting submodule 600, a first calculating submodule 602, and a second The calculation sub-module 604 and the second selection sub-module 606. The first selection sub-module 600 is configured to select M MBSFN areas i or the smallest MCCH 4 tampering period in the N MBSFN areas in which the cell is currently located, where N > 1, N and M are integers, JL M <N; a first calculation sub-module 602, configured to calculate a ratio of M MBSFN areas: t or a modificationPeriod/repetitionPeriod of each MBSFN area i or a second calculation sub-module 604, configured to use the calculated ratio as one The set, the intersection of the set of values and the set of notificationRepetitionCoeff is calculated; the second selection sub-module 606 is configured to select the MCCH corresponding to the MBSFN area corresponding to one of the calculated intersections. Preferably, if the set includes multiple values, the second selection sub-module 606 may select the MCCH corresponding to the MBSFN area corresponding to the ratio with the largest value in the set. From the above description, it can be seen that, in the embodiment of the present invention, a part or all of the radio frame carrying the MCCH is used to carry the MCCH update indication information, and the location of the MCCH update indication information may be implemented in the cell that does not overlap. It is also applicable to the cell of the overlapping coverage to implement the location determination of the MCCH update indication information. Therefore, the MCCH update indication information is uniformly carried in the MBSFN subframe, and in particular, when the multiple MBSFN regions overlap, the MCCH update indication information parameter configuration process is simple, and the MCCH update indication information can be guaranteed to be carried in the MBSFN subframe. Obviously, those skilled in the art will appreciate that the various modules or steps of the present invention described above can be implemented with a general purpose computing device, which can be centralized on a single computing device, or distributed. Alternatively, on a network of computing devices, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, The steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of the modules or steps may be implemented as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A multicast control channel MCCH update indication information sending method, comprising: selecting an MBMS single frequency network MBSFN area i or a MCCH of an MBSFN area;

The MCCH update indication information of the cell is transmitted on part or all of the radio frames in which the MCCH is located.

The method according to claim 1, wherein the transmitting the MCCH update indication information of the cell to the radio frame where the MCCH is located includes:

The system radio frame number SFN of the radio frame carrying the MCCH update indication information is determined according to the following equation:

SFN mod (modifi cati oinPeri od/notificati onRepeti onCoeff)=notifi cati onOff set , where modificationPeriod is the MCCH modification period of the MCCH; notificationRepetitionCoeff is the MCCH update indication information sent in one of the MCCH f tampering periods The number of times, the value set is {2, 4, 8, 16, 32} or any subset thereof; the notificationOffset ear is an integer greater than or equal to 0;

And transmitting the MCCH update indication information on the determined radio frame corresponding to the system radio frame number.

3. The method of claim 2, wherein

notificationRepetitionCoeff < modificationPeriod/repetitionPeriod, where repetitionPeriod is the transmission period of the MCCH.

4. The method of claim 2, wherein the set of notificationOffset values is { 0 , 1 , 2 , 3 , , 10 }.

The method according to claim 2, wherein the notificationOffset is equal to the value of the offset parameter carried in the configuration signaling of the radio frame carrying the MCCH.

The method according to claim 2, wherein the notificationOffset is greater than the value of the offset parameter carried in the configuration signaling of the radio frame carrying the MCCH.

The method according to any one of claims 2 to 6, wherein if the cell In the coverage of the N MBSFN areas, where N>l and N are integers, selecting the MCCH of one MBSFN area in the MBSFN area includes:

Selecting M MBSFN areas i or where the MCCH revision period of the N MBSFN area i or the smallest is the M_N, where M is an integer;

Calculating a ratio of modificationPeriod/repetitionPeriod of the M MBSFN areas or each of the MBSFN areas i or

Calculating the calculated ratio as a set, and calculating an intersection of the set and the set of values of the notificationRepetitionCoefF;

The calculated MCCH corresponding to the MBSFN area corresponding to one of the calculated intersections is selected. The method according to claim 7, wherein if the calculated intersection has a plurality of values, the MCCH corresponding to the MBSFN region corresponding to one of the calculated intersections includes:

And selecting the MCCH corresponding to the MBSFN area corresponding to the ratio of the largest value of the intersection, wherein if there are multiple of the maximum ratios, selecting the MCCH corresponding to the MBSFN area corresponding to the largest ratio is in the system information block 13 The position of the middle position is the highest. The method according to claim 1, wherein the transmitting the MCCH update indication information of the cell on the radio frame comprises at least one of the following:

And transmitting the MCCH update indication information to a subframe in which the MCCH is located in the radio frame;

Transmitting the MCCH update indication information on a predetermined subframe within the radio frame;

Transmitting the MCCH update indication information in a subframe in the radio frame, and transmitting indication information indicating a subframe in which the MCCH update indication information is carried. The method according to claim 9, wherein the transmitting, by the MCCH update indication information 7|, in the subframe in which the MCCH is located in the radio frame comprises:

And transmitting the MCCH update indication information to a first subframe in which the MCCH is located in the radio frame.

The method according to claim 9, wherein the indication information indicating the subframe that carries the MCCH update indication information comprises: a bitmap bitmap or a subframe number.

The method according to claim 1, wherein the MBMS single frequency network MBSFN area i or one of the MBSFN area i or the MCCH in which the selected cell is currently located includes the following: when there is a single change in the MCCH When the MCCH with the smallest period is selected, the MCCH with the smallest period is selected.

When there are multiple MCCHs with the smallest period of the MCCH, and the MCCH with the smallest repetition period exists in the MCCH with the smallest period of the plurality of 4 爹 change periods, the MCCH with the smallest repetition period is selected;

When there are multiple MCCHs with the smallest change period in the MCCH, and there are multiple MCCHs with the smallest repetition period in the MCCH with the smallest modification period, the multiple MCCHs with the smallest repetition period are selected. One MCCH.

13. The method of claim 12, wherein the selecting one of the plurality of MCCHs having the smallest repetition period comprises:

The first MCCH or the last MCCH in the configuration list is selected according to the configuration list in the system information block 13.

A device for transmitting MCCH update indication information, comprising:

a selection module, configured to select an MCCH of an MBSFN area in the MBSFN area of the MBMS single frequency network where the cell is currently located;

And a sending module, configured to send the MCCH update indication information of the cell to a part or all of the radio frames where the MCCH selected by the selecting module is located.

The device according to claim 14, wherein the sending module comprises:

Determining a submodule for determining a system radio frame number SFN of a radio frame carrying the MCCH update indication information according to the following equation:

SFN mod (modifi cati oinPeri od/ notifi cati onRepeti onCoeff)=notifi cati onOff set , where

modificationPeriod is the MCCH 4 tampering period of the MCCH; The notificationRepetitionCoeff is the number of times the MCCH update indication information is sent in one MCCH change period, and the value set is {2, 4, 8, 16, 32} or any subset thereof;

The notificationOffset value is an integer greater than or equal to 0;

And a sending submodule, configured to send the MCCH update indication information on the determined radio frame corresponding to the system radio frame number. The device according to claim 15, wherein the selection module comprises:

a first selection sub-module, configured to select an MCCH in the N MBSFN areas in which the cell is currently located, and M MBSFN areas in which the period is the smallest, where N > 1 , N and M are integers, and JL M<N;

a first calculation submodule, configured to calculate a modificationPeriod/repetitionPeriod value of each MBSFN area in the M MBSFN areas;

a second calculation submodule, configured to calculate the calculated ratio as a set, and calculate an intersection of the set and the set of values of the notificationRepetitionCoeff;

And a second selection submodule, configured to select the MBSFN area i corresponding to one of the calculated intersections or the corresponding MCCH.