WO2011097930A1

WO2011097930A1 - Method and system for transmitting multipoint control channel change information

Info

Publication number: WO2011097930A1
Application number: PCT/CN2010/080392
Authority: WO
Inventors: 戴博; 吴欣; 曾萍; 郁光辉; 左志松
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-02-11
Filing date: 2010-12-28
Publication date: 2011-08-18
Also published as: CN101800942B; CN101800942A

Abstract

A method and system for transmitting multipoint control channel (MCCH) change information are disclosed. The method comprises the steps of: selecting a first component carrier in a plurality of component carriers by a base station, and transmitting the MCCH change information corresponding to a second component carrier on the first component carrier to a user equipment by the base station, wherein the second component carrier is the same with or different from the first component carrier. According to the technical solution provided by the present invention, the MCCH change information can be dynamically transmitted under a scene of the plurality of component carriers, and can be correctly obtained by the user equipment.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a multicast control channel (MCCH) change information transmission method and system. In order to meet the requirements of the International Telecommunication Union-Advanced (ITU-Advanced), the Long Term Evolution Advanced (Long Term Evolution Advanced, referred to as the Long Term Evolution (LTE) evolution standard) For LTE-A systems, systems need to support larger system bandwidths (up to 100MHz) and require backward compatibility with existing LTE standards. On the basis of the existing LTE system, the bandwidth configuration of the LTE system can be combined to obtain a larger bandwidth. The above technology is called Carrier Aggregation (CA) technology, and the carrier aggregation technology can improve advanced intelligence. The multi-mode terminal (Intelligent Multimode Terminal, IMT-Advance for short) system uses spectrum utilization and mitigation of spectrum resources, which can optimize the utilization of spectrum resources. In the LTE system, a physical downlink control channel (PDCCH) is used to carry uplink and downlink scheduling information and uplink power control information.

In the LTE system, a Physical Downlink Shared Channel (PDSCH) is used to transmit user data. The downlink control information (Downlink Control Information, DCI for short) can be divided into the following types: DCI format 0, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, etc. The following are described separately:

The DCI format 0 is used to indicate a scheduling of a physical uplink shared channel (PUSCH);

DCI format 1 , 1A, IB , 1C , ID is used for different transmission modes of the Physical Downlink Shared Channel (PDSCH) for a single transport block;

DCI format 2, 2A is used for different transmission modes of downlink PDSCH space division multiplexing; The DCI format 3, 3 A is used for transmission of a power uplink control channel (PUCCH for short) and a power control command of the PUSCH. The above DCI format 0, 1A, 3, 3 A has the same transport block size, where DCI format 0,

1A uses 1 bit for format differentiation. The process of blind detection of the physical downlink control channel (PDCCH) in LTE is briefly described as follows. The Control Channel Element (CCE) is the smallest unit carrying the PDCCH resource, and the control region is composed of a series of CCEs.

The PDCCH blind detection range is defined by the search space, and the search space is divided into a common search space and a UE-specific search space. The search space is defined as: +1 where CCE aggregation level e {1, 2, 4, 8}, for the common search space Y _k =0 , ie from

Search in CCE=0~15. For the UE-specific search space ^U^^mod, Y_ _x = n _Rmi ≠ 0 , = 39827 , ) = 65537 , A = L« _s /2", " _s denotes the slot number. ~ 19. = 0, · · · , 1 , m = 0, - -, M ^iL) ― 1 . is the number of PDCCH candidate sets (satisfied) after L is given in the search space. Where Wj^n indicates the temporary value of the wireless network i ( Radio Network Temporary

Identifier, referred to as RNTI). The above RNTI corresponds to one of the following wireless network temporary identifiers: System Information-RNTI (SI-RNTI for short); Random Access-RNTI (RA-RNTI for short); RNTI (Paging-RNTI, abbreviated as P-RNTI); Cell RNTI (Cell-RNTI, abbreviated as C-RNTI); Semi-persistent Scheduling RNTI (SPS-RNTI); Temporary Cell RNTI (Temporary) C-RNTI )„ The above-mentioned ^W RNTI specifically selects which type of RNTI is configured by higher layer signaling, and the specific value is also specified by the corresponding signaling and data. The values of RNTI are shown in Table 1 below. The search space defined according to the aggregation level is shown in Table 2 below. When the UE is blindly detected, it is detected according to the DCI format corresponding to the downlink transmission mode. The 16-bit Cyclic Redundancy Check (CRC) of each downlink control information DCI is added by 4 to the above RNTI. Different UEs can be configured with different RNTIs to add 4 CRCs, so that DCIs of different UEs can be distinguished. Table 1: RNTI values

Table 2: PDCCH candidates monitored by UE

In the LTE system, the multicast control channel (MCCH) change information is transmitted through the DCI format 1C, where the number of bits included in the DCI format 1C carrying the MCCH change information is used as a bearer for the DCI format 1C. The number of bits included in the DCI format 1C is the same, and the MCCH change information is 8 bits, and the remaining bits in the DCI format 1C are reserved. Blind detection of MCCH change information is only performed in the common search space, and the DC of the DCI (including MCCH repair information) uses a unique M (Multicast) - RNTI scrambling. In the LTE-A carrier aggregation scenario, multiple carrier types are introduced. The LTE-A carrier type can be divided into three types: Backwards compatible carrier, Non-backwards compatible carrier, and Extension carrier. The extension carrier has two meanings: (1) as part of a component carrier (CC); (2) as a separate component carrier. The extended carrier cannot operate independently and must belong to a part of a set of component carriers, and at least one of the component carriers in the set can work independently. The extended carrier is not visible to LTE UEs. In order to design simplicity and consider various possible application scenarios, the extended carrier is configured to be

PDCCH. Then the DCI corresponding to the extended carrier needs to be transmitted on other component carriers. In the LTE-A carrier aggregation scenario, the PDCCH component set (PDCCH CC set ) is defined, and the UE needs to perform blind detection in the PDCCH CC set. The downlink component carrier set (DL Link set) is also defined. The UE's PDSCH can be sent on any CC in the DL CC set. In the LTE-A carrier aggregation scenario, cross-carrier scheduling is allowed, that is, the PDCCH on a certain component carrier can schedule PDSCH or PUSCH on multiple component carriers. However, the current method for transmitting the MCCH modification information in the multi-component carrier has not been determined, and the MCCH 4 tampering information cannot be correctly obtained by the user equipment, so that the MCCH repair cannot be determined. The information that the MCCH information on the component carrier corresponding to the information is changed. SUMMARY OF THE INVENTION The present invention has been made in view of the problem that the user equipment cannot correctly acquire the multicast control channel change information in the related art. To this end, the main object of the present invention is to provide an improved multicast control channel MCCH change information transmission method and System to solve at least one of the above problems. According to an aspect of the present invention, a method of transmitting MCCH change information is provided. The method for transmitting the MCCH change information according to the present invention includes: the base station selects the first component carrier in the multi-component carrier; and the base station transmits the MCCH change information corresponding to the second component carrier to the user equipment on the first component carrier, where The second component carrier is the same or different from the first component carrier. According to another aspect of the present invention, a transmission system for MCCH change information is provided. The transmission system of the MCCH change information according to the present invention includes: a base station, configured to select a first component carrier in a multi-component carrier, and transmit MCCH change information corresponding to the second component carrier to the user equipment on the first component carrier, The second component carrier is the same or different from the first component carrier, and the user equipment is configured to receive the MCCH change information corresponding to the second component carrier on the first component carrier. With the present invention, the base station transmits the MCCH change information corresponding to the carrier or other carrier to the user equipment on the selected component carrier. The problem that the user equipment cannot correctly obtain the MCCH change information in the related art is solved, and the multicast control channel change information dynamic transmission in the multi-component carrier scenario can be realized, and the correct acquisition of the multicast control channel change information by the user equipment is implemented. Other features and advantages of the invention will be set forth in the description which follows, and The objectives and other advantages of the invention will be realized and attained by the <RTI BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a structure of a transmission system for MCCH change information according to an embodiment of the present invention; FIG. 2 is a block diagram showing a structure of a transmission system for MCCH change information according to a preferred embodiment of the present invention; FIG. 4 is a flowchart of a method for transmitting MCCH change information according to an embodiment of the present invention; FIG. 5 is a flowchart of a multi-component carrier according to an embodiment of the present invention; A schematic diagram of transmitting multicast control channel change information across carriers. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that, in the case of no conflict, the embodiments in the present application and the special embodiments in the embodiments The signs can be combined with each other. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. According to an embodiment of the present invention, a transmission system of MCCH change information is first provided. 1 is a block diagram showing the structure of a transmission system for MCCH change information according to an embodiment of the present invention. As shown in FIG. 1, the transmission system of the MCCH change information includes the following devices: a base station 10 and a user equipment 20. The base station 10 is configured to select a first component carrier in the multi-component carrier, and transmit MCCH change information corresponding to the second component carrier to the user equipment on the first component carrier, where the second component carrier is the same or different from the first component carrier a component carrier; the user equipment 20, configured to receive MCCH change information corresponding to the second component carrier on the first component carrier. The above system can implement dynamic transmission of multicast control channel change information in a multi-component carrier scenario, and implement correct acquisition of the multicast control channel change information by the user equipment 20. Preferably, as shown in FIG. 2, the base station 10 may further include: a first selecting means 100 for indicating a selected component carrier according to the high layer signaling; and a second selecting means 102 for using a preset unique carrier or unique association The selected component carrier is selected from the carrier; the third selecting means 104 is configured to randomly select the component carrier from the physical downlink control channel PDCCH component carrier set; and the fourth selecting means 106 is configured to select the resident carrier as the first component carrier. In a specific implementation process, the base station 10 selects a component carrier for the multicast control channel change information to be sent by using at least one of the following manners: (1) the high layer signaling indicates the selected component carrier; wherein, the base station selects to send the multicast packet. Controlling the component carrier of the channel change information, the base station uses the higher layer signaling to transmit the indication information of the selected component carrier to one or more UEs through the third layer radio resource control layer (Radio Resource Control, RRC for short), and the UE analyzes the upper layer. Signaling acquires indication information of the selected component carrier; the base station transmits DCI of the multicast control channel change information on the selected component carrier, and the UE detects the DCI of the multicast control channel change information on the selected carrier.

(2) selecting a unique carrier or a unique associated carrier in the physical downlink control channel component carrier set of the user equipment; Wherein, when the PDCCH component carrier set has only one for the UE, or when the extended carrier B (ie, the second component carrier) is only associated with one component carrier A (ie, the first component carrier), the former UE needs to be blindly detected. The DCI of the broadcast control channel change information is on the unique first component carrier, and the DCI of the multicast control channel change information of the second component carrier that the UE needs to detect blindly is on the unique component carrier A. Signaling indication.

(3) randomly selecting a component carrier from the PDCCH component carrier set; wherein, any one of the component carriers may be selected from the component carrier set of the PDCCH to transmit the DCI of the extended carrier's multicast control channel change information or the cross-carrier scheduled component carrier The multicast control channel changes the DCI of the information. For example, one component carrier A may be selected from the component carrier set for transmitting the DCI of the multicast control channel change information of the extension carrier B.

(4) Use the resident carrier as the selected component carrier. Wherein, when the UE needs to acquire multicast control channel change information of other component carriers other than the component carrier set of the PDCCH, the DCI of the multicast control channel change information may be sent on the downlink resident carrier of the UE. Specifically, the multicast control channel change information in the LTE-A may perform cross-carrier scheduling; that is, the downlink control information (DCI) related to the multicast control channel change information of the component carrier B (ie, the second component carrier) The UE may send the user equipment (User Equipment, UE for short) on the other component carrier A (ie, the second component carrier, where B is different from A), and the UE may detect the carrier B multicast control channel change on the carrier A. Information related downlink control information (DCI); the component carrier A (ie, the first component carrier) of the downlink control information related to the multicast control channel change information of the component carrier B is transmitted by the base station, and may be configured by high layer signaling; or PDCCH Any one of the component carrier sets; or the resident carrier; or the only one carrier A in the PDCCH component carrier set of the UE or one component carrier A associated with the extended carrier B. The multicast control channel change information is on the unique component carrier A. Preferably, as shown in FIG. 2, the foregoing base station 10 includes one of the following devices: The first indication device 108 is configured to: when transmitting the MCCH change information corresponding to the second component carrier, use the wireless network temporary identifier with the carrier indication feature. And indicating the second component carrier; the second indication device 110 is configured to: when the MCCH change information corresponding to the second component carrier is sent, use the carrier indication information to indicate the second component carrier. Preferably, the first indication device 108 is further configured to: use a customized multicast carrier to indicate that the wireless network temporary identifier value indicates the second component carrier; and the second indication device 110 is further configured to use the cross-carrier to schedule the wireless network temporary identifier. The value indicates the second component carrier, or the second component carrier is indicated by the multicast wireless network temporary identifier and the carrier indication information. In a specific implementation process, the base station 10 determines, on the selected component carrier, a component corresponding to the to-be-transmitted multicast control channel change information by using a radio network temporary identifier with a carrier indication feature or a downlink control information format carrying carrier indication information. The carrier is implemented by defining a carrier indicating the radio network temporary identifier value CI-RNTI or the carrier indication information carried in the DCI format 1C. In the foregoing transmission system, the second indication device 110 may define a carrier indication signal specifically for indicating a component carrier corresponding to the MCCH change information in a downlink control information format (for example, DCI format 1C) carrying the MCCH change information. In the specific implementation process, the carrier indication information carried in the downlink control information format (for example, DCI format 1C) carrying the corresponding multicast control channel change information may be carried in the MCCH change information bit (for example, 8 bits). a predetermined bit (for example, 3 bits), or a predetermined bit (for example, 3 bits) remaining in the remaining bits after removing the MCCH change information bit in the DCI format 1C, or a CRC carried in the downlink control information format 1C In the scrambling code; preferably, after the MCCH change information and the carrier indication information are removed in the DCI format 1C, the remaining bits are reserved bits. The number of bits included in the DCI format 1C carrying the MCCH change information is the same as the number of bits included in the DCI format 1C of the first component carrier bearer system information, random access information, and call information in the related art; The DCI format 1C of the change information includes the same number of bits as the DCI format 1C of the downlink control information of the physical carrier channel of the first component carrier in the related art. In the foregoing transmission system, the DCI of the different carrier multicast control channel change information sent by the base station 10 on the same carrier scrambles the CRC by using different scrambling codes for the PDCCH carrying the corresponding DCI, thereby distinguishing different carrier multicast control The DCI of the channel change information. A carrier-carrier indicator-Radio Network Temporary Identifier (M-CI-RNTI) is allocated to each component carrier that needs to be scheduled by the cross-carrier in the cell, and the corresponding multicast control channel is carried by each carrier. Changing the PDCCH usage of the DCI of the information In the specific implementation process, the CRC of the DCI format 1C carrying the carrier indication information and the multicast control channel change information is used to schedule the wireless network temporary identifier value by using the cross-carrier, or The M-RNTI and the carrier indication information (CI) are scrambled, wherein the cross-carrier scheduling radio network temporary identifier value is configured by signaling, does not carry the carrier indication information, and only carries the DCI format 1C CRC of the multicast control channel change information. In other words, for the terminal side, for the R9 version UE, when transmitting the MCCH modification information, the base station carries the DCCH format 1C CRC of the MCCH change information with the M-RNTI plus 4 In particular, for the R10 version or the R10 or higher version UE, the base station is sending the MCCH repair_? When carrying information, carry MCCH? The DCI format 1C CRC of the change information is scrambled by one of the following methods: 多 Multicast carrier is used to indicate the wireless network temporary identification value scrambling; 跨 Cross-carrier scheduling wireless network temporary identification value scrambling; 多 Multicast wireless The network temporary identification value and the carrier indication information are scrambled; and the multicast wireless network temporary identification value is scrambled. For the R10 version or the R10 or higher version UE, when the UE is located in the R9 network, the CRC of the downlink control information format 1C is scrambled with the temporary identification value of the multicast wireless network; for the user equipment of the R10 version or the R10 version, when the UE In the network of R10 or R10, when the first carrier and the second carrier are the same, the CRC of the downlink control information format 1C can be scrambled by the temporary identifier of the multicast wireless network; when the UE is located in the R10 version or In the R10 or higher version network, when the first volume carrier and the second volume carrier are different, the CRC of the downlink control information format 1C uses the cross-carrier scheduling wireless network temporary identifier value to scramble or use the multicast wireless network temporary identifier value and The carrier indication information is scrambled or the multicast carrier is used to indicate the wireless network temporary identification value scrambling. Preferably, the base station 10 is further configured to: when the first component carrier transmits the MCCH change information corresponding to the second component carrier of the first component carrier, use the multicast wireless network temporary identifier value to the downlink control information. The CRC of format 1C is scrambled. 3 is a schematic diagram of information transmission of a transmission system of MCCH change information according to a preferred embodiment of the present invention. As shown in FIG. 3, the process mainly includes the following processing (step 4: S302-step 4: 306): Step S302: The base station 10 in the transmission system selects a first component carrier for the multicast control channel change information to be transmitted. Step S304: The base station 10 sends the multicast control channel change information to be sent to the user equipment UE on the selected first component carrier, where the radio network temporary identifier with the carrier indication feature is used on the selected component carrier ( For example, M-CI-RNTI) or carried carrier indication information is determined The component carrier corresponding to the multicast control channel change information to be transmitted, or the component carrier corresponding to the multicast control channel change information is the component carrier selected for transmission; Step S306: The selected first component of the user equipment 20 The multicast control channel change information sent from the base station 10 is received on the carrier, and the component carrier corresponding to the multicast control channel change information is distinguished by using the radio network temporary identifier or the carrier indication information having the carrier indication feature. According to an embodiment of the present invention, a method for transmitting MCCH change information is also provided. FIG. 4 is a flowchart of a method for transmitting MCCH change information according to an embodiment of the present invention. As shown in FIG. 4, the transmission method mainly includes the following processing (step S402 - step S404): Step S402: The base station 10 selects a first component carrier among multiple component carriers; and step S404: the base station 10 is on the first component carrier The MCCH change information corresponding to the second component carrier is transmitted to the user equipment 20, wherein the second component carrier is the same or different from the first component carrier. The above system can implement dynamic transmission of multicast control channel change information in a multi-component carrier scenario, and implement correct acquisition of the multicast control channel change information by the user equipment 20. Preferably, the base station 10 selects the first component carrier by at least one of the following: (1) indicating the selected component carrier according to the high layer signaling;

(2) selecting a unique carrier or a unique associated carrier in the physical downlink control channel component carrier set of the user equipment;

(3) randomly selecting a component carrier from a physical downlink control channel PDCCH component carrier set;

(4) Select the resident carrier as the first component carrier. A detailed description of the above manner can be found in the detailed description of the first to fourth selected devices included in the base station in the transmission system. Through the above processing, it is possible to solve the problem of which component carrier or components are used to transmit the multicast control channel change information. Preferably, the transmitting, by the base station, the MCCH change information corresponding to the second component carrier on the first component carrier comprises: using, by the base station, the radio network temporary identifier (RNTI) with the carrier indication feature or the carrier indication information on the first component carrier. Indicates the second component carrier. Preferably, the wireless network temporary identifier comprises: the customized multicast carrier indicating the wireless network temporary identifier value. Through the above processing, it is possible to solve the problem of how to indicate the multicast control channel change information of which component carrier the multicast control channel change information to be transmitted on the selected carrier. In a specific implementation process, in step S404, the newly defined component is utilized on the selected component carrier.

The step of determining, by the RNTI or the carrier indication information, the component carrier corresponding to the DCI of the multicast control channel change information to be sent may be determined by defining a radio network temporary identifier CI-RNTI having a carrier indication feature or by using carrier indication information. The transmitted multicast control channel changes the component carrier corresponding to the information. Through the above processing, the M-CI-RNTI and the new carrier indication information are used to indicate the carrier corresponding to the multicast control channel change information, so that the terminal can receive correctly. Therefore, downlink control information for transmitting other carrier multicast control channel change information on one carrier can be implemented, so that the acquisition problem and dynamic transmission of the multicast control channel change information in the carrier aggregation scenario can be solved. The following describes the scheme in which the M-CI-RNTI and the carrier indication information are indicated.

(1) using the M-CI-RNTI to indicate that when there are component carriers scheduled by the cross-carrier in the cell, different M-CI-RNTIs are configured by the higher layer signaling for each component carrier scheduled by the cross-carrier, the M- The value of the CI-RNTI can be selected from the RNTI values reserved in the LTE system, that is, the reserved values FFF3 FFFCFC, and the different component carriers have different M-CI-RNTI values, and do not conflict with other types of RNTIs. Or determining, according to the component identifier of the radio network temporary identifier and the MCCH change information, the carrier indication radio network temporary identifier value, for example: M-CI-RNTI = M-RNTI + CI; when the MCCH change information of the component carrier B is When transmitting on this carrier B, carries the MCCH of component carrier B? The DCI of the DCI format 1C of the change information is directly added by the M-RNTI. When the DCI of the MCCH change information of the component carrier B is not transmitted on the carrier B, for example, the component carrier A selected by the above four methods is used. In the case of uplink transmission, the CRC component of the DCI format 1C carrying the MCCH change information of the component carrier B is increased by 4 in the M-CI-RNTI of the component carrier B.

The UE achieves the purpose of distinguishing the multicast control channel change information of different component carriers by descrambling the check DCI. Among them, DCI format 1C with M-CI-RNTI plus 4 is located in the common search space.

(2) Instructing to use the carrier indication information. In a specific implementation process, a carrier indication signaling specifically for indicating a component carrier corresponding to the multicast control channel change information may be defined in the DCI format 1C; preferably, the downlink The carrier indication information of the control information format 1C is carried in the bit of the MCCH change information, or is carried in the other bits of the downlink control information format 1C except for the MCCH change information, wherein the multicast control channel change information is carried in the downlink control. The bit of the information format 1C is, or is, carried in the CRC scrambling code of the downlink control information format 1C. In the specific implementation process, the carrier indication information carried in the downlink control information format 1C (DCI format 1C) carrying the corresponding multicast control channel change information may be carried in a predetermined bit in the MCCH change information bit (for example, 8 bits) ( For example, in 3 bits), or, is the bearer removed in DCI format 1C? Determining a predetermined bit (for example, 3 bits) of the remaining bits after the information bit (for example, 8 bits); preferably, the remaining bits after removing the MCCH change information and the carrier indication information in the downlink control information format 1C are pre- Leave the bit. Preferably, when the base station transmits the MCCH change information corresponding to the second component carrier on the first component carrier, the CRC of the downlink control information format 1C is scrambled by the inter-carrier scheduling wireless network temporary identifier value, where the cross-carrier scheduling wireless The network temporary identification value is configured by signaling, or the CRC of the downlink control information format 1C is scrambled by the multicast wireless network temporary identification value and the carrier indication information. In a specific implementation process, before the base station selects the first component carrier in the multi-component carrier, the base station may further include the following processing:

(1) The method in which the base station determines the MCCH change information of the multicast control channel is determined according to a pre-agreed manner, where the pre-agreed manner includes: transmitting only the MCCH change information corresponding to the first component carrier on the first component carrier, that is, Cannot transmit the MCCH corresponding to other component carriers on the first component carrier? Change information;

(2) The base station notifies the terminal to use one of the two transmission modes by using the signaling message, where the two transmission modes include: transmitting only the corresponding component of the first component carrier on the first component carrier

MCCH changes information, that is, cannot transmit other component carriers on the first component carrier. The MCCH changes information; and, the MCCH change information corresponding to the second component carrier may be sent on the first component carrier, where the second component carrier and the first component carrier may be the same or different. Preferably, when the base station uses only the MCCH change information corresponding to the first component carrier on the first component carrier, the CRC of the downlink control information format 1C uses the temporary identifier value of the wireless network (ie, M-RNTI). . Preferably, the downlink control information format 1C carrying the multicast control channel change information includes the same number of bits as the downlink control information format 1C of the first component carrier carrying the system information, the random access information, and the call information; And/or the downlink control information format 1C carrying the multicast control channel change information includes the same number of bits as the downlink control information format 1C of the downlink control information of the first component carrier carrying one codeword stream physical shared channel. Preferably, the downlink control information format 1C carrying the multicast control channel change information is located in the common search space. Preferably, when the base station transmits the MCCH change information corresponding to the second component carrier to the user equipment, the method further includes the following steps: (1) the user equipment receives the MCCH change information corresponding to the second component carrier on the first component carrier;

(2) The user equipment determines, according to the multicast carrier indication radio network temporary identifier value or the carrier indication information, the second component carrier corresponding to the MCCH change information. Preferably, when the user equipment is the R9 version user equipment, the CRC of the downlink control information format 1C is scrambled with the multicast wireless network temporary identification value. Preferably, the user equipment is a user equipment of the R10 version or the R10 version. When the base station uses the transmission mode of the MCCH change information corresponding to the second component carrier of the first component carrier on the first component carrier, the downlink control information is used. The CRC of format 1C is scrambled by one of the following methods: 多Multicast carrier is used to indicate the wireless network temporary identification value scrambling; 跨Multi-carrier scheduling wireless network temporary identification value scrambling is used; 多Multicast wireless network temporary identification value and The carrier indication information is scrambled. In the specific implementation process, for the R10 version or the R10 or higher version UE, when the UE is located in the R9 version network, the CRC of the downlink control information format 1C can use the multicast carrier to indicate that the wireless network temporary standard i only has a value of 4; For R10 or R10 users, when the UE is in the R10 or R10 network, when the first carrier and the second carrier are the same, the downlink control information is used. The CRC of the format 1C may be scrambled by the temporary identifier of the multicast wireless network; when the UE is located in the network of R10 or R10, when the first carrier and the second carrier are different, the CRC of the downlink control information format 1C The cross-carrier scheduling radio network temporary identification value is scrambled or scrambled with the multicast radio network temporary identification value and the carrier indication information. In the specific implementation process, for the R10 version or the R10 or higher version UE, when the base station uses only the MCCH change information corresponding to the first component carrier on the first component carrier, the CRC of the downlink control information format 1C is multicast. The carrier indicates that the wireless network temporary identification value is scrambled. Example 1 This example mainly describes a scheme for selecting a component carrier that transmits MCCH change information by using a high-level signaling configuration mode, and using M-CI-RNTI to add a 4-special indication scheme. Description will be made below with reference to FIG. 5. As shown in Figure 5, there are three carriers CC1, CC2, CC3. CC3 is an extension carrier, and there are two component carriers in the PDCCH CC set of the UE, which are recorded as CC1 and CC2. Since the extension carrier CC3 has no PDCCH, the multicast control channel change information of the extension carrier can be transmitted on other component carriers by higher layer signaling. The M-CI-RNTI allocated to CC3 by the higher layer signaling is FFFC (hexadecimal;). When the base station transmits the multicast control channel change information of the extension carrier CC3 by the high layer signaling indication on the component carrier CC2, the corresponding DCI CRC uses the M-CI-RNTI=FFFC (hexadecimal) of the extension carrier CC3. 4 especially;

The UE blindly detects the multicast control channel change information of the extended carrier CC3 on the CC2 according to the high layer signaling indication, detects the DCI format 1C in the common search space, and solves the DCI information by using the M-CI-RNTI=FFFC of the extended carrier CC3. . Through the foregoing processing, the UE may acquire the change information of the multicast control channel of the extended carrier CC3 according to the obtained DCI. Example 2 This example mainly describes selecting a component carrier for transmitting multicast control channel change information by using a random selection method, and using the newly defined downlink control information format DCI format X for indication. Description will be made below with reference to FIG. 5. As shown in Figure 5, there are three carriers CC1, CC2, CC3. CC3 is an extension carrier, and there are two component carriers in the PDCCH CC set of the UE, which are recorded as CC1 and CC2.

The UE needs to acquire multicast control channel change information of CC1, CC2 and CC3. Then, the UE blindly detects the multicast control channel change information of CC1 on the component carrier CC1, and blindly detects the multicast control channel change information of the CC2 on the component carrier CC2, and performs detection on the carrier of the component carrier set, for example, in CC1 and CC2. The multicast control channel change information of the extended carrier CC3 is blindly detected. The base station uses the higher layer signaling to configure the UE to modulate the DCI of the DCI of the multicast control channel change information of the extended carrier CC3 with M-CI-RNTI = FFF4 (hexadecimal).

When the UE blindly detects the DCI of the multicast control channel change information of the extended carrier CC3 on the carriers CC1 and CC2 of the component carrier set, the CRC is descrambled by M-CI-RNTI=FFF4 (hexadecimal), and then the DCI is checked. Information, the corresponding information is interpreted according to the information content of the DCI format 1C containing the carrier indication information. The component carrier corresponding to the MCCH change information obtained by the carrier indication CI information in the DCI format 1C is CC3. The change of the multicast control channel of CC3 is then determined based on the multicast control channel change information in DCI format 1C. In summary, the foregoing embodiment of the present invention provides a transmission scheme of a multicast control channel MCCH change information, which can solve how to indicate which component carrier of the transmitted multicast control channel change information is on the selected carrier. The control channel change information is broadcasted so that the user equipment UE can identify and accurately acquire the multicast control channel change information of each component carrier. By selecting the transmitted component carrier and accurately indicating which component carrier the multicast control channel change information corresponds to, downlink control information for transmitting other carrier multicast control channel change information on one carrier can be implemented; Acquisition of multicast control channel change information in two carrier aggregation scenarios: cross-carrier scheduling and cross-carrier scheduling. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, 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, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into 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 scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A multicast control channel A method for transmitting MCCH change information, which is applied in the context of a multi-component carrier, includes the following steps:

The base station selects a first component carrier among the multi-component carriers;

And transmitting, by the base station, the MCCH change information corresponding to the second component carrier to the user equipment, where the second component carrier is the same or different from the first component carrier.

2. The method of claim 1, wherein the base station selects the first component carrier by at least one of the following:

Selecting a component carrier according to a high layer signaling indication;

Determining a unique carrier or a unique associated carrier in a physical downlink control channel component carrier set of the user equipment;

The component carrier is randomly selected from the physical downlink control channel PDCCH component carrier set; the resident carrier is selected as the first component carrier.

The method according to claim 1 or 2, wherein the transmitting, by the base station, the MCCH change information corresponding to the second component carrier on the first component carrier comprises: the base station at the first The component carrier indicates the second component carrier by using a radio network temporary identifier having a carrier indication feature or the second component carrier by using carrier indication information.

4. The method according to claim 3, wherein the wireless network temporary identifier comprises: a customized multicast carrier indicating a wireless network temporary identifier value.

The method according to claim 4, wherein the multicast carrier indicates that the radio network temporary identifier value is determined by one of the following manners: configuring by using high layer signaling, where one carrier corresponds to one multicast carrier indicating the wireless network a temporary identifier value; determining, according to the component carrier index corresponding to the multicast wireless network temporary identifier and the MCCH change information, the wireless network temporary identifier value.

The method according to claim 4, wherein: using the multicast carrier to indicate a radio network temporary identifier value, carrying the corresponding multicast control channel change sent on the first component carrier The downlink control information format 1C of the information is cyclic redundancy check CRC scrambling.

The method according to claim 3, wherein the carrier indication information is carried in a bit of a downlink control information format 1C, and the multicast control channel change information is carried in a bit of the downlink control information format 1C. in.

The method according to claim 7, wherein the carrier indication information is carried in a bit of the MCCH change information of the downlink control information format 1C, or 7 is carried in the downlink control information format 1C. Among other bits of the MCCH change information, or carried in the CRC scrambling code of the downlink control information format 1C.

The method according to claim 8, wherein the remaining bits after the MCCH change information and the carrier indication information are removed from the downlink control information format 1C are reserved bits.

10. The method according to claim 7, wherein the CRC of the downlink control information format 1C is scrambled with a cross-carrier scheduling radio network temporary identifier value, wherein the cross-carrier scheduling radio network temporary identifier value is signaled For example, the CRC of the downlink control information format 1C is scrambled by using the multicast wireless network temporary identifier value and the carrier indication information.

The method according to claim 1, wherein, before the base station selects the first component carrier in the multi-component carrier, the method further includes:

The base station determines, according to a pre-agreed manner, a manner of transmitting the MCCH change information of the multicast control channel, where the pre-agreed manner includes: transmitting, on the first component carrier, only MCCH change information corresponding to the first component carrier; or

The base station notifies the terminal to use one of the two transmission modes by using a signaling message, where the two transmission modes include: transmitting only the first component carrier on the first component carrier Corresponding MCCH change information; and, on the first component carrier, MCCH change information corresponding to the second component carrier, where the second component carrier and the first component carrier may be the same or different.

The method according to claim 11, wherein, when the base station uses only the MCCH change information corresponding to the first component carrier on the first component carrier, the CRC of the downlink control information format 1C加 Scramble with the multicast wireless network temporary identity value.

13. The method according to claim 3 or 12, wherein

The downlink control information format 1C carrying the multicast control channel change information includes the same number of bits as the downlink control information format 1C of the first component carrier carrying system information, random access information, and call information. ; and / or

The downlink control information format 1C carrying the multicast control channel change information includes the same number of bits as the downlink control information format 1C of the downlink control information of the first component carrier carrying a codeword stream physical shared channel.

The method according to claim 3 or 12, wherein the downlink control information format 1C carrying the multicast control channel change information is located in a common search space.

The method according to any one of claims 5 to 10, wherein when the base station transmits the MCCH change information corresponding to the second component carrier to the user equipment, the method further includes the following steps:

The user equipment receiving the MCCH corresponding to the second component carrier on the first component carrier? Change information;

Determining, by the user equipment, the second component carrier corresponding to the MCCH change information according to the radio network temporary identifier value or the carrier indication information.

The method according to claim 3 or 12, wherein, when the user equipment is a R9 version user equipment, the CRC of the downlink control information format 1C uses the multicast wireless network temporary identifier value .

The method according to claim 3, wherein, when the user equipment is the R10 version or the R10 or the upper version of the user equipment, the CRC of the downlink control information format 1C is spoofed by one of the following methods:

指示 using the multicast carrier to indicate a wireless network temporary identifier value plus 4;

</ RTI> </ RTI> using the cross-carrier scheduling wireless network temporary identification value scrambling;

And scrambling the multicast wireless network temporary identity value and the carrier indication information.

The method according to claim 12, wherein, when the user equipment is a R10 version or an R10 or higher version user equipment, the CRC of the downlink control information format 1C uses the multicast wireless network temporary identifier value plus 4 especially.

19. A multicast control channel A transmission system for MCCH change information, applied in the context of a multi-component carrier, includes the following means:

a base station, configured to select a first component carrier in the multi-component carrier, and transmit MCCH change information corresponding to the second component carrier to the user equipment on the first component carrier, where the second component carrier Same or different from the first component carrier;

The user equipment is configured to receive the MCCH corresponding to the second component carrier on the first component carrier? Change information.

20. The system according to claim 19, wherein the base station comprises one of: a first selecting means configured to indicate a selected component carrier according to a higher layer signaling; and a second selecting means configured to be from the user equipment Selecting a unique carrier or a unique associated carrier in the physical downlink control channel component carrier set;

a third selecting device, configured to randomly select a component carrier from a physical downlink control channel PDCCH component carrier set;

And a fourth selecting means, configured to select a resident carrier as the first component carrier.

The system according to claim 19 or 20, wherein the base station comprises one of: a first indication device, configured to use a carrier when transmitting MCCH change information corresponding to the second component carrier Determining a feature of the wireless network temporary identifier indicating the second component carrier;

And the second indication device is configured to: when the MCCH change information corresponding to the second component carrier is sent, use the carrier indication information to indicate the second component carrier.

The system according to claim 19 or 20, wherein the first indication device is further configured to: indicate, by using a customized multicast carrier, that the wireless network temporary identifier value indicates the second component carrier; The second indication device is further configured to: indicate, by using a cross-carrier, a radio network temporary identifier value to indicate the second component carrier, or use a multicast radio network temporary identifier and carrier indication information to indicate the second component carrier.

The system according to claim 19 or 20, wherein the base station is further configured to: when the MCCH change information corresponding to the first component carrier can only be sent on the first component carrier, use multicast The wireless network temporary identification value scrambles the CRC of the downlink control information format 1C.