WO2014113968A1 - Procédé d'apprentissage de changement de canal, procédé de notification et dispositif - Google Patents

Procédé d'apprentissage de changement de canal, procédé de notification et dispositif Download PDF

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Publication number
WO2014113968A1
WO2014113968A1 PCT/CN2013/070984 CN2013070984W WO2014113968A1 WO 2014113968 A1 WO2014113968 A1 WO 2014113968A1 CN 2013070984 W CN2013070984 W CN 2013070984W WO 2014113968 A1 WO2014113968 A1 WO 2014113968A1
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WIPO (PCT)
Prior art keywords
carrier
downlink control
search space
rnti
mcch
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PCT/CN2013/070984
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English (en)
Chinese (zh)
Inventor
成艳
周永行
高振兴
范霄安
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380035317.2A priority Critical patent/CN104412625B/zh
Priority to PCT/CN2013/070984 priority patent/WO2014113968A1/fr
Publication of WO2014113968A1 publication Critical patent/WO2014113968A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a channel change obtaining method, a notification method, and a device. Background technique
  • LTE Long Term Evolution
  • MBSFN Multimedia Broadcast Multicast service Single Frequency Network
  • the Multimedia Broadcast Multicast Service is supported on a dedicated carrier, that is, the MBSFN service is transmitted by using all subframes on the dedicated carrier, and the shared MBMS and unicast are supported on the single carrier.
  • the service, or hybrid MBSFN service implements time division multiplexing of MBSFN services and unicast services on different subframes of the carrier.
  • the user equipment acquires MBSFN subframe information (MBSFN-SubframeConfig field) in the Broadcast Information System Information Block 2 (SIB2), according to the MBSFN subframe.
  • SIB2 Broadcast Information System Information Block 2
  • which subframes in the information acquisition carrier are MBSFN subframes.
  • the UE acquires the information of the subframe in which the MBMS is transmitted in the RRC message, and the subframe in which the MBMS is transmitted is a subset of the MBSFN subframe acquired in the broadcast message SIB2.
  • the UE reads the SIB 13 and obtains the MBMS Control Channel (MCCH) information of the logical channel, and then acquires the information of the MBMS Traffic Channel (MBTCH Traffic Channel, MTCH for short) according to the indication of the MCCH information.
  • the UE receives the MBMS on a subframe in which the MBMS is transmitted.
  • the MCCH information is periodically transmitted with a configured repetition period.
  • the network side device When the MCCH information is changed, the network side device first informs the MCCH that the information is to be changed within a modification period, and specifically sends a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) to the UE, where the PDCCH corresponds to downlink control information (Downlink) Control Information, referred to as DCI) format 1C, which is carried in the DCI format.
  • PDCCH Physical Downlink Control Channel
  • DCI Downlink Control Information
  • the 8-bit information is used to indicate the MCCH change notification; then the content of the MCCH information is updated in the next modification period.
  • LTE-A LTE-Advanced
  • CA Carrier Aggregation
  • the PDCCH carrying the MCCH change notification is only sent in the common search space, and the UE only monitors the common search space on the primary carrier, so that the UE cannot receive the MCCH change notification corresponding to the secondary carrier, and the MBMS cannot be performed on the secondary carrier.
  • Business is not conducive to the full use of spectrum resources. Summary of the invention
  • the embodiment of the present invention provides a channel change obtaining method, a notification method, and a device, which are used to implement a notification of a MCCH change corresponding to a secondary carrier, to perform an MBMS service on a secondary carrier, and improve utilization of frequency resources.
  • the first aspect provides a channel change learning method, including:
  • the user equipment learns the MCCH change based on the MCCH change notification carried by the downlink control channel.
  • the designated search space is a proprietary search space.
  • the dedicated search space is a dedicated search space corresponding to the secondary carrier.
  • the designated RNTI is a cell radio network temporary identifier C-RNTI.
  • the user equipment before the decoding of the downlink control channel that is scrambled by using the specified RNTI, in the specified search space, according to the specified DCI format, includes:
  • the user equipment determines the specified search space according to the M-RNTI and the carrier index.
  • the carrier index is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.
  • the specified search space is located on a secondary carrier.
  • the designated RNTI is the M-RNTI.
  • the specified search space is a common search space.
  • the specified RNTI is a carrier-specific M-RNTI, and the carrier-specific M corresponding to different carriers -RNTI is different.
  • the user equipment in the specified search space, performs downlink control using the specified RNTI to perform scrambling on the basis of the specified DCI format. Before the channel is decoded, it includes:
  • the user equipment receives a broadcast message sent by the network side device, where the broadcast message carries information indicating a transmission subframe of the MCCH change notification corresponding to each carrier, and the transmission subframe of the MCCH change notification corresponding to the at least two carriers is different;
  • the user equipment determines, according to the information of the transmission subframe indicating the MCCH change notification corresponding to each carrier, the transmission subframe of the MCCH change notification corresponding to each carrier, and is based on the transmission subframe of the MCCH change notification corresponding to each carrier.
  • the designated DCI format is decoded in the designated search space for the downlink control channel scrambled by the designated RNTI.
  • the specified DCI format includes a first information domain and a second information domain, where the first information domain is used to indicate that the downlink control channel corresponds to Carrier, the second information field is used to indicate an MCCH change notification;
  • the user equipment is notified of the MCCH change based on the MCCH change notification carried by the downlink control channel, and includes:
  • the user equipment learns the carrier corresponding to the downlink control channel based on the value of the first information field in the DCI format carried by the downlink control channel, and learns the value of the second information field in the DCI format carried by the downlink control channel.
  • the MCCH corresponding to the carrier is changed.
  • the specified DCI format is format 1 C
  • the first information domain is a carrier indication domain CIF.
  • the specified DCI format includes an MCCH change notification
  • the MCCH change notification indication field includes N bits, each bit corresponding to one MCCH, and when the value of the bit is 1, the MCCH corresponding to the bit changes;
  • the N MCCHs corresponding to the bits include the MCCH corresponding to the M carriers, the N is an integer greater than or equal to 2, and the M is an integer greater than or equal to 2.
  • the N MCCHs corresponding to the M carriers are numbered in the order of increasing or decreasing the carrier index.
  • the lower order to the upper order correspond to the MCCH whose number is from small to large.
  • the second aspect provides a channel change notification method, including:
  • the network side device performs scrambling on the downlink control channel by using the designated radio network temporary identifier RNTI, where the downlink control channel carries the MCCH change notification;
  • the network side device sends the scrambled downlink control to the user equipment in the specified search space. Channel.
  • the designated search space is a dedicated search space.
  • the dedicated search space is a dedicated search space corresponding to the secondary carrier of the user equipment.
  • the designated RNTI is a cell radio network temporary identifier C-RNTI.
  • the network side device before the network side device sends the scrambled downlink control channel to the user equipment in the specified search space, the network side device includes: the network side Determining, by the device, the specified search space according to the multimedia broadcast multicast service radio network temporary identifier M-RNTI of the user equipment; or
  • the network side device determines the specified search space according to the M-RNTI and the carrier index of the user equipment.
  • the carrier index is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.
  • the specified search space is located on a secondary carrier of the user equipment.
  • the designated RNTI is the M-RNTI.
  • the specified search space is a common search space.
  • the specified RNTI is a carrier-specific M-RNTI, and the carrier-specific M corresponding to different carriers -RNTI is different.
  • the network side device sends the scrambled downlink control channel to a user equipment in a specified search space.
  • the network side device sends the scrambled downlink control channel to a user equipment in a specified search space.
  • the network side device sends a broadcast message to the user equipment, where the broadcast message carries a finger
  • the information of the transmission subframe of the MCCH change notification corresponding to each carrier is different, and the transmission subframe of the MCCH change notification corresponding to at least two carriers is different;
  • the network side device sends the scrambled downlink control channel to the user equipment in the specified search space, including:
  • the network side device transmits the scrambled downlink control channel to the user equipment in a designated search space on a transmission subframe of the MCCH change notification corresponding to each carrier.
  • the downlink control information corresponding to the downlink control channel includes a first information field and a second information field, where the first information field is used to indicate a carrier corresponding to the downlink control channel, and the second information domain user is instructed to notify an MCCH change notification.
  • the downlink control channel corresponding to the DCI format The MCCH change notification indication field is included, and the MCCH change notification indication field includes N bits, and each bit corresponds to one MCCH. When the value of the bit is 1, the MCCH corresponding to the bit changes.
  • the N MCCHs corresponding to the N bits include an MCCH corresponding to M carriers, the N is an integer greater than or equal to 2, and the M is an integer greater than or equal to 2.
  • the N MCCHs corresponding to the M carriers are numbered in the order of increasing or decreasing the carrier index.
  • the lower order to the upper order correspond to the MCCH whose number is from small to large.
  • the third aspect provides a user equipment, including:
  • a decoding module configured to decode a downlink control channel that is scrambled by using a specified radio network temporary identifier RNTI in a specified search space according to a specified downlink control information DCI format, where the downlink control channel carries an MCCH change notification;
  • An obtaining module configured to learn, according to the MCCH change notification carried by the downlink control channel,
  • MCCH changes.
  • the designated search space is a dedicated search space.
  • the dedicated search space is a dedicated search space corresponding to the secondary carrier.
  • the designated RNTI is a cell radio network temporary identifier C-RNTI.
  • the user equipment further includes: a determining module, configured to: according to a multimedia broadcast multicast service wireless network, before the decoding module performs decoding
  • the temporary identifier M-RNTI determines the specified search space, or determines the specified search space according to the M-RNTI and the carrier index.
  • the carrier index is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.
  • the specified search space is located on the secondary carrier.
  • the designated RNTI is the M-RNTI.
  • the specified search space is a common search space.
  • the specified RNTI is a carrier-specific M-RNTI, and the carrier-specific M corresponding to different carriers -RNTI is different.
  • the user equipment further includes: a receiving module, configured to receive, by the decoding module, a broadcast message sent by the network side device, where the broadcast message carries an MCCH change notification corresponding to each carrier Transmitting the information of the subframe, and the sending subframe of the MCCH change notification corresponding to the at least two carriers is different;
  • the decoding module is specifically configured to: determine, according to the information about the transmission subframe of the MCCH change notification corresponding to each carrier, the transmission subframe of the MCCH change notification corresponding to each carrier, and the transmitter of the MCCH change notification corresponding to each carrier On the frame, the downlink control channel scrambled by the specified RNTI is decoded in a specified search space based on the specified DCI format.
  • the specified DCI format includes the first information a domain and a second information field, where the first information field is used to indicate a carrier corresponding to the downlink control channel, and the second information field is used to indicate an MCCH change notification;
  • the acquiring module is specifically configured to learn, according to the value of the first information field in the DCI format carried by the downlink control channel, the carrier corresponding to the downlink control channel, and based on the second information domain in the DCI format carried by the downlink control channel
  • the value of the MCCH change corresponding to the carrier is known.
  • the specified DCI format is format 1 C
  • the first information domain is a carrier indication domain.
  • the specified DCI format includes an MCCH change notification
  • the MCCH change notification indication field includes N bits, each bit corresponds to one MCCH, and when the bit value is 1, the bit corresponds to The MCCH is changed.
  • the N MCCHs corresponding to the N bits include MCCHs corresponding to M carriers, and the N is an integer greater than or equal to 2, and the M is an integer greater than or equal to 2.
  • the N MCCHs corresponding to the M carriers are numbered in the order of increasing or decreasing the carrier index.
  • the lower order to the upper order correspond to the MCCH whose number is from small to large.
  • the fourth aspect provides a network side device, including:
  • a scrambling module configured to perform scrambling on a downlink control channel by using a specified radio network temporary identifier RNTI, where the downlink control channel carries an MCCH change notification;
  • a sending module configured to send the scrambled downlink control channel to the user equipment in the specified search space.
  • the specified search space is a dedicated search space.
  • the dedicated search space is a dedicated search space corresponding to the secondary carrier of the user equipment.
  • the designated RNTI is a cell radio network temporary identifier C-RNTI.
  • the network side device further includes: a determining module, configured to: before the sending module sends the scrambled downlink control channel, according to The multimedia broadcast multicast service radio network temporary identifier M-RNTI of the user equipment determines the specified search space, or determines the specified search space according to the M-RNTI and the carrier index of the user equipment.
  • a determining module configured to: before the sending module sends the scrambled downlink control channel, according to The multimedia broadcast multicast service radio network temporary identifier M-RNTI of the user equipment determines the specified search space, or determines the specified search space according to the M-RNTI and the carrier index of the user equipment.
  • the carrier index is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.
  • the specified search space is located on a secondary carrier of the user equipment.
  • the designated RNTI is the M-RNTI.
  • the specified cable space is a common search space.
  • the specified RNTI is a carrier-specific M-RNTI, and the carrier-specific M corresponding to different carriers -RNTI is different.
  • the sending module is specifically configured to: before sending the scrambled downlink control channel,
  • the user equipment sends a broadcast message, where the broadcast message carries information indicating a transmission subframe of the MCCH change notification corresponding to each carrier, and the transmission subframes of the MCCH change notification corresponding to the at least two carriers are different, and corresponding to each carrier
  • the transmitted downlink subframe of the MCCH change notification transmits the scrambled downlink control channel to the user equipment in a designated search space.
  • the downlink control information corresponding to the downlink control channel includes a first information field and a second information field, where the first information field is used to indicate a carrier corresponding to the downlink control channel, and the second information domain user is instructed to notify an MCCH change notification.
  • the downlink control channel corresponding to the DCI format The MCCH change notification indication field is included, and the MCCH change notification indication field includes N bits, and each bit corresponds to one MCCH. When the value of the bit is 1, the MCCH corresponding to the bit changes.
  • the N MCCHs corresponding to the N bits The MCH corresponding to the M carriers is included, and the N is an integer greater than or equal to 2, and the M is an integer greater than or equal to 2.
  • the N MCCHs corresponding to the M carriers are numbered in the order of increasing or decreasing the carrier index.
  • the lower order to the upper order correspond to the MCCH whose number is from small to large.
  • a fifth aspect provides a user equipment, including:
  • a decoder configured to decode, in a specified search space, a downlink control channel that is scrambled by using a specified radio network temporary identifier RNTI, according to a specified downlink control information, where the downlink control channel carries an MCCH change notification;
  • a processor configured to execute the program, to: learn an MCCH change based on an MCCH change notification carried by the downlink control channel.
  • the sixth aspect provides a network side device, including:
  • a processor configured to: perform, by using a specified radio network temporary identifier RNTI, to perform a scrambling on a downlink control channel, where the downlink control channel carries an MCCH change notification;
  • a communication interface configured to send the scrambled downlink control channel to the user equipment in the designated search space.
  • the UE decodes the downlink control channel that is scrambled by using the specified radio network temporary identifier in the specified search space according to the specified downlink control information format, based on the downlink control channel.
  • the MCCH change notification is performed, and the MCCH change is known.
  • the specified search space is no longer restricted to the common search space. Therefore, the MCCH change notification corresponding to the secondary carrier can be obtained, and the notification of the change of the MCCH corresponding to the secondary carrier can be implemented.
  • the MBMS service is carried out on the secondary carrier to improve the utilization of carrier resources.
  • FIG. 1 is a flowchart of a channel change obtaining method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a new to change notification method according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a UE according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of another UE according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of still another UE according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a network side device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another network side device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of another network side device according to an embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • FIG. 1 is a flowchart of a channel change obtaining method according to an embodiment of the present invention. As shown in FIG. 1, the method in this embodiment includes:
  • Step 101 The UE translates a downlink control channel that is scrambled by using a Radio Network Temporary Identifier (RNTI) in a specified search space according to a format of Downlink Control Information (DCI).
  • RNTI Radio Network Temporary Identifier
  • DCI Downlink Control Information
  • Step 102 The UE learns the MCCH change based on the MCCH change notification carried by the downlink control channel.
  • Carrier aggregation is also called spectrum aggregation.
  • the Aggregation or Bandwidth Extension mainly means that the frequency of two or more Component Carriers are aggregated to obtain a wider transmission bandwidth.
  • one of the two or more component carriers that are aggregated is configured as a primary carrier, and the other component carriers are used as secondary carriers, that is, the UE has a primary carrier and at least one secondary carrier.
  • the application scenario of the embodiment of the present invention is not limited.
  • the downlink control channel includes a PDCCH, or an enhanced PDCCH (Enhanced PDCCH, referred to as E-PDCCH).
  • the UE learns that the MCCH change includes: the UE learns the MCCH change corresponding to the primary carrier according to the MCCH change notification carried by the downlink control channel; or the MCCH change of the UE based on the downlink control channel
  • the notification informs the MCCH change corresponding to the secondary carrier.
  • the MCCH change corresponding to the secondary carrier refers to the MCCH change corresponding to the Physical Multicast Channel (PMCH) on the secondary carrier.
  • PMCH Physical Multicast Channel
  • the specified search space may be a UE-specific search space (UES).
  • the dedicated search space may be a dedicated search space corresponding to the secondary carrier. Based on this, the UE can learn the MCCH change corresponding to the secondary carrier based on the MCCH change notification carried by the downlink control channel.
  • RNTI Radio Network Temporary Identity
  • M-RNTI Multimedia Multicast Service Radio Network Temporary Identity
  • the specified RNTI used to scramble the downlink control channel in the embodiment of the present invention may be different in different application scenarios.
  • the specified search space is a dedicated search space corresponding to the secondary carrier, the designated RNTI may be a C-RNTI.
  • the UE before the UE decodes the downlink control channel that is scrambled by using the specified RNTI in the specified search space, the UE includes: determining, by the UE, the step of specifying the search space.
  • the UE may determine the specified search space according to the M-RNTI, or the UE may determine the specified search space according to the M-RNTI and the carrier index.
  • the carrier index may be a system-level carrier index, or the carrier index may be a cell-specific carrier index, and the cell-specific carrier index is the same for all users.
  • the carrier index may also be a user-specific carrier index, that is, a carrier index configured by the upper layer to the user equipment.
  • the UE determines, according to the M-RNTI, or the M-RNTI and the carrier index, that the specified search space is located on the secondary carrier, where the secondary carrier is the bearer corresponding to the MCCH. Carrier of PMCH. Based on this, the UE can learn the MCCH change corresponding to the secondary carrier based on the MCCH change notification carried by the downlink control channel. It should be noted that, when the UE determines the specified search space according to the M-RNTI and the carrier index, the designated The search space can also be located on the primary carrier.
  • the UE determines the specified search space according to the M-RNTI, if the value of the M-RNTI is not the same for all the carriers, the specified search space is located on the secondary carrier, that is, the PMCH corresponding to the MCCH is located at 7
  • the designated RNTI used to scramble the downlink control channel may be used by the UE to determine the M-RNTI used by the specified search space.
  • the specified search space may also be a Common Search Space (CSS).
  • CSS Common Search Space
  • the designated search space mainly refers to a common search space corresponding to the primary carrier.
  • the downlink control channels carrying the MCCH change notifications corresponding to the respective carriers are all transmitted in the common search space, it is necessary to distinguish the MCCH change notifications corresponding to the different carriers by other information.
  • An alternative manner for distinguishing MCCH change notifications corresponding to different carriers is: distinguishing different carriers by using the specified RNTI, for example, by configuring carrier-specific M-RNTIs for different carriers, carrier-specific M-
  • the RNTI can uniquely identify one carrier, that is, the carrier-specific M-RNTI corresponding to different carriers is different; based on this, the designated RNTI is a carrier-specific M-RNTI.
  • Another alternative method for distinguishing MCCH change notifications corresponding to different carriers is to distinguish between the transmission subframes of the MCCH change notifications corresponding to the respective carriers, and the transmission subframes of the MCCH change notifications corresponding to different carriers are different.
  • the network side device may send a broadcast message to the UE, where the broadcast message carries information indicating a transmission subframe of the MCCH change notification corresponding to each carrier, and the transmission subframe of the MCCH change notification corresponding to the at least two carriers is different.
  • the UE decodes the downlink control channel that is scrambled by using the specified RNTI in the specified search space according to the specified DCI format, and includes: the sending subframe of the MCCH change notification corresponding to each carrier that is carried by the UE according to the broadcast message.
  • the information determines the transmission subframe of the MCCH change notification corresponding to each carrier, and the downlink control channel scrambled by the specified RNTI in the designated search space based on the specified DCI format on the transmission subframe of the MCCH change notification corresponding to each carrier
  • the decoding is performed, so that the UE can distinguish MCCH change notifications corresponding to different carriers by using different transmission subframes.
  • Another optional method for distinguishing MCCH change notifications corresponding to different carriers is: distinguishing by specifying the information fields in the specified DCI format.
  • An optional implementation manner of distinguishing the MCCH change notifications corresponding to the different carriers by using the specified information field in the specified DCI format includes: the specified DCI format includes a first information domain and a second information domain, where the first information domain is used. Instructing the downlink control letter The second information field is used to indicate the MCCH change notification. The UE can learn from the specified DCI format which carrier the MCCH change notification carried by the downlink control channel corresponds to.
  • the UE learns the MCCH change based on the MCCH change notification carried by the downlink control channel, and includes: the UE learns the carrier corresponding to the downlink control channel based on the value of the first information field in the DCI format carried by the downlink control channel, and is based on the downlink control channel bearer.
  • the value of the second information field in the DCI format is learned by the MCCH change corresponding to the carrier.
  • the specified DCI format may be format 1C
  • the first information field is a carrier indicator field (CIF).
  • An alternative implementation manner of the MCCH change notification corresponding to the different carriers by using the specified information field in the specified DCI format includes: the specified DCI format includes an MCCH change notification indication field, and the MCCH change notification indication field includes N Each of the bits corresponds to one MCCH, and when the value of the bit is 1, the MCCH corresponding to the bit changes; wherein the N MCCHs corresponding to the N bits include M carriers In the corresponding MCCH, the N is an integer greater than or equal to 2, and the M is an integer greater than or equal to 2.
  • the N MCCHs corresponding to the M carriers are numbered in the order of increasing or decreasing the carrier index, and the N bits from the lower bits to the upper bits are sequentially corresponding to the MCCHs that are numbered from small to large.
  • the X MCCHs corresponding to the carriers may be first sorted, and the MCCHs corresponding to the M carriers are sorted in the order of increasing or decreasing the carrier index, and finally numbered. Based on this, the UE can determine which MCCH corresponding to which carrier changes by determining the position of the bit of 1 in the N bits.
  • mapping relationship between each bit and the MCCH corresponding to each carrier may be set in advance, and the UE may determine which carrier is based on the mapping relationship and the bit in the MCCH change notification indication field that has a value of 1. Which MCCH is changed correspondingly.
  • the UE may acquire the updated MCCH corresponding to the PMCH on the carrier in the next modification period.
  • the UE decodes the downlink control channel scrambled by the specified RNTI in the specified search space according to the specified DCI format, and learns the MCCH change based on the MCCH change notification carried by the downlink control channel, where the specified search is performed.
  • the space is no longer restricted to the common search space. Therefore, the MCCH change notification corresponding to the secondary carrier can be obtained, thereby implementing the notification of the change of the MCCH corresponding to the secondary carrier, so that the MBMS service can be performed on the secondary carrier, thereby improving the utilization of the carrier resource.
  • the MCCH change corresponding to the first secondary carrier is obtained as an example, but is not limited to the first secondary carrier.
  • MCCH change, and the downlink control channel uses PDCCH or
  • the first secondary carrier may refer to any one of the secondary carriers of the UE.
  • the specified search space is a dedicated search space corresponding to the first secondary carrier, that is, the downlink control channel corresponding to the first secondary carrier is detected in the dedicated search space;
  • the designated RNTI may be C. -RNTI.
  • the process of the UE learning the MCCH change includes: the UE performs the Cyclic Redundancy Check (CRC) scrambling using the C-RNTI based on the specified DCI format in the dedicated search space corresponding to the first secondary carrier. Decoding the PDCCH or E-PDCCH;
  • CRC Cyclic Redundancy Check
  • the UE learns the MCCH change corresponding to the first secondary carrier based on the MCCH change notification of the PDCCH or the E-PDCCH.
  • the private search space of the first secondary carrier and the C-RNTI used for scrambling are pre-configured with the network-side device and pre-configured. Specifically, the UE detects a PDCCH or an E-PDCCH that is scrambled by the C-RNTI and has a DCI format of the format 1C in a specific search space corresponding to the first secondary carrier in a specific subframe, according to the DCI format 1C. Instructing the MCCH change notice
  • the MCCH is corresponding to the PMCH on the first secondary carrier
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the load size (ayload size) corresponding to the DCI format corresponding to the downlink control channel may be aligned with the DCI format 0 or the DCI format 4, and the specific pull mode may be added by adding 0 bits.
  • the specific pull mode may be added by adding 0 bits.
  • 0 bits are added so that the load size corresponding to the DCI is the same as the load size of the DCI format 0 or the DCI format 4.
  • the DCI format corresponding to the downlink control channel in DCI format 0 or DCI format 4 corresponds to the same secondary carrier.
  • the load size of the DCI format corresponding to the downlink control channel is aligned with the DCI format 0 or the DCI format 4, the number of blind detections of the PDCCH or E-PDCCH corresponding to the UE on the first secondary carrier may not be increased. .
  • the specified search space is a dedicated search space corresponding to the first secondary carrier, that is, the downlink control channel corresponding to the first secondary carrier that carries the MCCH change notification is detected in the dedicated search space;
  • the above specified RNTI may be an M-RNTI.
  • the process of the UE learning the MCCH change includes: the UE decoding the PDCCH or E-PDCCH that performs CRC scrambling using the M-RNTI according to the specified DCI format in the specific search space corresponding to the first secondary carrier; Or the MCCH change notification carried by the E-PDCCH, and the MCCH change corresponding to the first secondary carrier is learned.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the private search space of the first secondary carrier and the M-RNTI used for scrambling are pre-configured with the network side device and pre-configured. Specifically, the UE detects a PDCCH or an E-PDCCH that is scrambled by the M-RNTI and has a DCI format of the format 1C in a specific search space corresponding to the first secondary carrier in a specific subframe, according to the DCI format 1C.
  • the MCCH is changed in the 8-bit information indicating the MCCH change notification, and the MCCH is the MCCH corresponding to the PMCH on the first secondary carrier.
  • the foregoing designated RNTI may be corresponding to the first secondary carrier.
  • the above specified search space is a search space determined according to the M-RNTI, or based on the M-RNTI and the carrier index of the first secondary carrier.
  • the UE learns the MCCH change process: the UE first determines the specified search space according to the M-RNTI corresponding to the first secondary carrier, or the M-RNTI and the carrier index of the first secondary carrier; and thereafter, based on the specified DCI format Decoding the PDCCH or E-PDCCH that performs CRC scrambling using the M-RNTI in the specified search space; the UE learns the MCCH change based on the MCCH change notification carried by the PDCCH or the E-PDCCH.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the UE may specifically determine the specified search space for the first secondary carrier according to the M-RNTI corresponding to the first secondary carrier and the carrier index of the first secondary carrier.
  • the UE may determine the specified search space for the first secondary carrier according to the M-RNTI corresponding to the first secondary carrier.
  • the carrier index may refer to a carrier index of the system level, or the carrier index may refer to a cell-specific carrier index, and the cell-specific carrier index is the same for all users.
  • the carrier index may also be a user-specific carrier index, that is, a carrier index configured by the upper layer for the user equipment.
  • the UE After determining the specified search space, the UE specifically searches for the specified search on the feature subframe. Between the PDCCH or the E-PDCCH that is scrambled by the M-RNTI and the DCI format is the format 1C, the MCCH is changed according to the 8-bit information used to indicate the MCCH change notification in the DCI format 1C, and the MCCH is the first secondary carrier. The MCCH corresponding to the PMCH.
  • the specified search space may be a common search space, that is, the MCCH change notification of the first secondary carrier is sent in the common search space, and for the CA user, usually only the primary carrier has a common search space;
  • the RNTI is a carrier-specific M-RNTI.
  • the carrier-specific M-RNTI of the first secondary carrier is mainly used, and the carrier-specific M-RNTI of different carriers is different.
  • the process of the UE learning the MCCH change includes: the UE decoding the PDCCH or E-PDCCH that performs CRC scrambling using the carrier-specific RNTI of the first secondary carrier in the common search space according to the specified DCI format; the UE is based on the PDCCH or The MCCH change notification carried by the E-PDCCH is used to learn the MCCH change corresponding to the first secondary carrier.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the PDCCH or the E-PDCCH corresponding to the different carriers are scrambled by using the carrier-specific RNTI corresponding to the carrier, so that the MCCH change notifications of all the carriers can be sent in the common search space corresponding to the primary carrier, that is, the MCCH change corresponding to the secondary carrier.
  • the notification may also be sent in the common search space corresponding to the primary carrier, thereby solving the problem of receiving the MCCH change notification on the secondary carrier.
  • the common search space of the primary carrier and the carrier-specific RNTI corresponding to the first secondary carrier used for scrambling are pre-configured with the network-side device, and are pre-configured. Specifically, the UE detects, in a common subframe corresponding to the primary carrier, a PDCCH or E-PDCCH that is scrambled by the carrier-specific RNTI of the first secondary carrier and the DCI format is format 1C, according to the DCI format. In the 1C, the 8-bit information indicating the MCCH change notification is learned, and the MCCH is changed. The MCCH is the MCCH corresponding to the PMCH on the first secondary carrier.
  • the specified search space is a common search space; the specified RNTI is an M-RNTI; in this embodiment, the MCCH change notification corresponding to the different carriers is the specified information domain in the specified DCI format.
  • the specified DCI format includes a first information field and a second information field, where the first information field is used to indicate a carrier corresponding to the PDCCH or the E-PDCCH, and the second information field is used to indicate an MCCH change notification.
  • the process of learning the MCCH change includes: the UE decoding the PDCCH or the E-PDCCH that performs CRC scrambling using the M-RNTI in the common search space according to the specified DCI format;
  • the UE learns the first secondary carrier corresponding to the PDCCH or the E-PDCCH based on the value of the first information field in the DCI format of the PDCCH or the E-PDCCH, and is based on the value of the second information field in the DCI format of the PDCCH or the E-PDCCH.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the M-RNTI is used for the PDCCH carrying the MCCH change notification or
  • the EPDCCH performs CRC scrambling, and the M-RNTIs corresponding to all the secondary carriers may be the same or different.
  • the first information field included in the DCI format may be a CIF, and the CIF may be configured by a 3-bit, and is mainly used to carry a carrier corresponding to the PDCCH or the E-PDCCH.
  • the format 1C may include the following fields: an 8-bit second information field, which is used to carry the MCCH change notification, the 3-bit CIF, and the reserved bit field. Whether the reserved bit field exists depends on whether the DCI format 1C needs to add 0 bits to be aligned with the payload size of the DCI format 1C for single PDSCH scheduling.
  • the pull refers to the load size corresponding to the DCI format 1C when indicating the MCCH change notification corresponding to the carrier, which is the same as the load size when used for single PDSCH scheduling. If a pull is required, the DCI format includes a reserved bit field, and if no pull is required, the DCI format may not include a reserved bit field.
  • the first information field in this embodiment may also reuse the reserved bit field in the DCI format 1C.
  • the specified request space may be a common search space; the designated RNTI may be an M-RNTI; in this embodiment, the MCCH change corresponding to different carriers is distinguished by the transmission subframe of the MCCH change notification. Notice.
  • the process of the UE being informed of the MCCH change includes: receiving, by the UE, a broadcast message of the network side device, and determining, according to the broadcast message, a transmission subframe of the MCCH change notification corresponding to each carrier; the broadcast message in this step may be the SIB13.
  • the network side device notifies the UE of the information of the transmission subframe of the MCCH change notification corresponding to each carrier through the SIB13, and the transmission subframe of the MCCH change notification corresponding to the different carriers does not match.
  • the UE decodes the PDCCH or the E-PDCCH that performs CRC scrambling using the M-RNTI in the common search space, based on the specified DCI format, on the determined transmission subframe of the MCCH change notification corresponding to the first secondary carrier.
  • the UE learns the MCCH change corresponding to the first secondary carrier based on the MCCH change notification carried by the PDCCH or the E-PDCCH.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the M-RNTI is used to perform CRC scrambling on the PDCCH or EPDCCH that carries the MCCH change notification, and the M-RNTIs corresponding to all carriers may be the same or different.
  • the UE determines the first secondary carrier corresponding to the MCCH change notification according to the subframe in which the MCCH change notification is detected.
  • the specified search space may be a common search space; the specified RNTI may be an M-RNTI; in this embodiment, the MCCH corresponding to different carriers is distinguished by specifying a specified information field in the DCI format. Change Notification.
  • the process for the UE to learn the MCCH change includes: the UE decodes the PDCCH or E-PDCCH that performs CRC scrambling using the M-RNTI in the common search space according to the specified DCI format; the DCI carried by the UE according to the PDCCH or the E-PDCCH
  • the value of the MCCH change notification indication field in the format is used to learn the MCCH change corresponding to the first secondary carrier.
  • the MCCH change notification indication field includes N bits, and each bit corresponds to one MCCH. When the bit value is 1, the MCCH corresponding to the bit changes, and N of the N bits correspond.
  • the MCCH includes MCCHs corresponding to M carriers, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2. This embodiment mainly indicates whether the MCCH corresponding to each carrier is changed by a bitmap. It should be noted that the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the M-RNTI is used to perform CRC force interference on the PDCCH or EPDCCH that carries the MCCH change notification, and the M-RNTIs corresponding to all carriers may be the same or different.
  • the MCCHs corresponding to the M carriers may be numbered in a unified manner.
  • the MCCHs corresponding to the M carriers are sequentially numbered in the order of increasing or decreasing the carrier index.
  • the MCCH corresponding to the carrier with the low carrier index may be numbered first, and then The MCCH corresponding to the carrier with a high carrier index is numbered, and the N bits from the lower to the upper are sequentially associated with the MCCH whose number is from small to large.
  • the X MCCHs corresponding to the carriers may be first sorted, and the MCCHs corresponding to the M carriers are sorted in the order of increasing or decreasing the carrier index, and finally numbered. Based on this, the UE can determine which MCCH corresponding to which carrier changes by determining the position of the bit of 1 in the N bits.
  • the mapping relationship determines the MCCH corresponding to a certain bit and the carrier corresponding to the MCCH according to the mapping relationship.
  • the MCCH change notification corresponding to the different carriers is differentiated in various manners, so that the MCCH change notification corresponding to the secondary carrier can be identified, and the MCCH change notification corresponding to the secondary carrier is implemented, so that the MBMS can be performed on the secondary carrier. Service, thereby improving the utilization of carrier resources.
  • FIG. 2 is a flowchart of a new to change notification method according to an embodiment of the present invention. As shown in FIG. 2, the method in this embodiment includes:
  • Step 201 The network side device scrambles the downlink control channel by using the designated RNTI, where the downlink control channel carries the MCCH change notification.
  • Step 202 The network side device sends the scrambled downlink control channel to the UE in a specified search space.
  • This embodiment is also mainly applicable to a carrier aggregation scenario, which is described from the description of the network side device. It should be noted that the application scenario of the embodiment of the present invention is not limited.
  • the network side device of this embodiment may be a base station, but is not limited thereto.
  • the downlink control channel includes a PDCCH, or an E-PDCCH.
  • the MCCH change notification carried by the downlink control channel may be an MCCH change notification corresponding to the primary carrier, or may be an MCCH change notification corresponding to the secondary carrier.
  • the MCCH change notification corresponding to the secondary carrier is mainly used to indicate that the MCCH corresponding to the PMCH on the secondary carrier changes.
  • the specified search space may be a dedicated search space.
  • the dedicated search space may be a dedicated search space corresponding to the secondary carrier of the UE. Based on this, the MCCH change notification carried by the downlink control channel is used to indicate that the MCCH corresponding to the secondary carrier is changed.
  • the specified RNTI used to scramble the downlink control channel in the embodiment of the present invention may be different in different application scenarios.
  • the specified search space is a dedicated search space corresponding to a secondary carrier of the UE
  • the designated RNTI may be a C-RNTI.
  • the network side device before the network side device sends the scrambled downlink control channel to the UE in the specified search space, the network side device includes: determining, by the network side device, the step of the specified search space. Step.
  • the network side device may determine the specified search space according to the M-RNTI of the UE, or the network side device may determine the specified search space according to the M-RNTI and the carrier index of the UE.
  • the carrier index may be a system-level carrier index, or the carrier index may be a cell-specific carrier index, and the cell-specific carrier index is the same for the user.
  • the carrier index may also be a user-specific carrier index, that is, a carrier index configured by the upper layer to the user equipment.
  • the network side device determines, according to the M-RNTI of the UE, or the M-RNTI and the carrier index of the UE, that the specified search space is located in the secondary carrier of the UE.
  • the secondary carrier is a carrier that carries the PMCH corresponding to the MCCH.
  • the MCCH change notification carried by the downlink control channel is mainly used to indicate the MCCH change corresponding to the secondary carrier. It should be noted that, when the network side device determines the specified search space according to the M-RNTI and the carrier index, the specified search space may also be located on the primary carrier.
  • the network side device determines the specified search space according to the M-RNTI, if the value of the M-RNTI is not the same for all the carriers, the specified search space is located on the secondary carrier, that is, the PMCH corresponding to the MCCH is carried. On the secondary carrier.
  • the designated RNTI used to scramble the downlink control channel may be used by the network side device to determine the M-RNTI used by the specified search space.
  • the specified search space may also be a common search space.
  • the designated search space mainly refers to a common search space corresponding to the primary carrier.
  • the downlink control channels carrying the MCCH change notifications corresponding to the respective carriers are all transmitted in the common search space, it is necessary to distinguish the MCCH change notifications corresponding to the different carriers by other information.
  • An alternative manner for distinguishing MCCH change notifications corresponding to different carriers is: distinguishing different carriers by using the specified RNTI, for example, by configuring carrier-specific M-RNTIs for different carriers, carrier-specific M-
  • the RNTI can uniquely identify one carrier, that is, the carrier-specific M-RNTI corresponding to different carriers is different; based on this, the designated RNTI is a carrier-specific M-RNTI.
  • Another alternative method for distinguishing MCCH change notifications corresponding to different carriers is to distinguish between the transmission subframes of the MCCH change notifications corresponding to the respective carriers, and the transmission subframes of the MCCH change notifications corresponding to different carriers are different.
  • the network side device may send a broadcast message to the UE before transmitting the scrambled downlink control channel to the UE in the specified search space, where the broadcast message carries a transmission subframe indicating an MCCH change notification corresponding to each carrier.
  • Information and at least two The transmission subframe of the MCCH change notification corresponding to the carrier is different.
  • the network side device transmits the scrambled downlink control channel to the UE in the designated search space in the transmission subframe of the MCCH change notification corresponding to each carrier.
  • MCCH change notifications corresponding to different carriers are distinguished by different transmission subframes.
  • Another alternative method for distinguishing MCCH change notifications corresponding to different carriers is: distinguishing by specifying the information fields in the specified DCI format.
  • An optional implementation manner of distinguishing the MCCH change notifications corresponding to the different carriers by using the specified information field in the specified DCI format includes: the specified DCI format includes a first information domain and a second information domain, where the first information domain is used. The carrier corresponding to the downlink control channel is indicated, and the second information field is used to indicate the MCCH change notification. The UE can learn from the specified DCI format which carrier the MCCH change notification carried in the downlink control channel corresponds to.
  • the network side device may indicate the carrier corresponding to the downlink control channel by setting a value of the first information field in the DCI format that is carried by the downlink control channel, and set the second information domain in the DCI format that is based on the downlink control channel bearer.
  • the value indicates the MCCH change corresponding to the carrier.
  • the specified DCI format may be format 1C
  • the first information domain is CIF.
  • An alternative implementation manner of the MCCH change notification corresponding to the different carriers by using the specified information field in the specified DCI format includes: the specified DCI format includes an MCCH change notification indication field, and the MCCH change notification indication field includes N Each of the bits corresponds to one MCCH, and when the value of the bit is 1, the MCCH corresponding to the bit changes; wherein the N MCCHs corresponding to the N bits include M carriers In the corresponding MCCH, the N is an integer greater than or equal to 2, and the M is an integer greater than or equal to 2.
  • the N MCCHs corresponding to the M carriers are numbered in the order of increasing or decreasing the carrier index, and the N bits from the lower bits to the upper bits are sequentially corresponding to the MCCHs that are numbered from small to large.
  • the X MCCHs corresponding to the carriers may be first sorted, and the MCCHs corresponding to the M carriers are sorted in the order of increasing or decreasing the carrier index, and finally numbered.
  • the network side device may indicate that a certain MCCH corresponding to the corresponding carrier is changed by setting the value of one or some bits in the MCCH change notification field to 1.
  • the mapping relationship between each bit and the MCCH corresponding to each carrier may be set in advance, and the network side device may set the value of one or some bits in the MCCH change notification indication field based on the mapping relationship.
  • a bit of 1 indicates that a certain MCCH corresponding to the corresponding carrier has changed.
  • the network side device scrambles the downlink control channel by using the specified RNTI, and then sends the scrambled downlink control channel to the UE in the specified search space, so that the UE can perform the scrambled downlink based on the specified DCI format.
  • the control channel is decoded, and the MCCH change is learned based on the MCCH change notification carried by the downlink control channel.
  • the specified search space is no longer restricted to the common search space. Therefore, the MCCH change corresponding to the secondary carrier can be notified to the UE.
  • the notification of the change of the MCCH corresponding to the carrier enables the MBMS service to be performed on the secondary carrier, thereby improving the utilization of the carrier resource.
  • the MCCH change corresponding to the first secondary carrier is notified as an example, but is not limited to the first secondary carrier.
  • the corresponding MCCH is changed, and the downlink control channel is represented by a PDCCH or an E-PDCCH.
  • the first secondary carrier may refer to any one of the secondary carriers of the UE.
  • the specified search space is a dedicated search space corresponding to the first secondary carrier, that is, the downlink control channel corresponding to the first secondary carrier is detected in the dedicated search space;
  • the designated RNTI may be C. -RNTI.
  • the process of the network side device notifying the MCCH change includes: the network side device performs CRC scrambling on the PDCCH or the E-PDCCH by using the C-RNTI of the first secondary carrier, where the PDCCH or
  • the E-PDCCH carries the MCCH change notification; the network side device sends the scrambled PDCCH or the E-PDCCH to the UE in the dedicated search space corresponding to the first secondary carrier, so that the UE can use the first secondary carrier based on the specified DCI format.
  • the corresponding dedicated search space is used to decode the scrambled PDCCH or the E-PDCCH, and further, based on the MCCH change notification carried by the PDCCH or the E-PDCCH, the MCCH change corresponding to the first secondary carrier is obtained.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the MCCH change notification is sent to all UEs that receive the PMCH corresponding to the MCCH through the PDCCH or the E-PDCCH in the current modification period.
  • the private search space of the first secondary carrier and the C-RNTI used for scrambling are pre-configured with the UE and pre-configured.
  • the dedicated search space corresponding to the first secondary carrier refers to a dedicated search space corresponding to the carrier carrying the PMCH service corresponding to the MCCH, where the carrier pair receives all of the
  • the UE of the PMCH is the first secondary carrier.
  • the load size corresponding to the DCI format corresponding to the downlink control channel (ayload) Size ) can be aligned with DCI format 0 or DCI format 4, and the specific pull mode can be added by adding 0 bits.
  • the specific pull mode can be added by adding 0 bits.
  • 0 bits are added so that the load size corresponding to the DCI is the same as the load size of the DCI format 0 or the DCI format 4.
  • the DCI format 0 or the DCI format 4 corresponds to the same secondary carrier as the DCI format corresponding to the downlink control channel.
  • the load size of the DCI format corresponding to the downlink control channel is aligned with the DCI format 0 or the DCI format 4, the number of blind detections of the corresponding PDCCH or E-PDCCH of the UE on the first secondary carrier may not be increased. .
  • the DCI format corresponding to the downlink control channel is aligned with the DCI format 0 or the DCI format 4, and the number of 0 bits that should be added when laating may be pre-configured on the UE and the network side device.
  • the specified search space is a dedicated search space corresponding to the first secondary carrier, that is, the downlink control channel corresponding to the first secondary carrier is detected in the dedicated search space; the specified RNTI may be M-RNTI.
  • the process of the network side device notifying the MCCH change includes: the network side device performs CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI of the first secondary carrier, where the PDCCH or the E-PDCCH carries the MCCH change notification; The device sends the scrambled PDCCH or the E-PDCCH to the UE in the dedicated search space corresponding to the first secondary carrier, so that the UE can perform scrambling on the dedicated search space corresponding to the first secondary carrier based on the specified DCI format.
  • the subsequent PDCCH or E-PDCCH is decoded, and the MCCH change corresponding to the first secondary carrier is learned based on the DCCH change notification of the PDCCH or the E-PDCCH.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the MCCH change notification is sent to all UEs that receive the PMCH corresponding to the MCCH through the PDCCH or the E-PDCCH in the current modification period.
  • the private search space of the first secondary carrier and the M-RNTI used for scrambling are pre-configured with the UE and pre-configured.
  • the dedicated search space corresponding to the first secondary carrier refers to a dedicated search space corresponding to the carrier carrying the PMCH service corresponding to the MCCH, where the carrier is the first for all UEs that receive the PMCH. Secondary carrier.
  • the M-RNTI may be shared by a group of UEs that all receive the PMCH on the first secondary carrier. If the specific search spaces corresponding to the first secondary carrier of the group of UEs overlap, And the network side device sends the PDCCH or the E-PDCCH to the group of UEs, so that the network side device can only send one PDCCH or E-PDCCH, where the network side device sends the PDCCH or the E-PDCCH to the group of UEs. Thereby saving PDCCH or E-PDCCH resources.
  • the specified RNTI may be an M-RNTI corresponding to the first secondary carrier; the specified search space is determined according to the M-RNTI, or according to the carrier index of the M-RNTI and the first secondary carrier. Search space.
  • the process of the network side device notifying the MCCH change includes: the network side device performs CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI of the first secondary carrier, where the PDCCH or the E-PDCCH carries the MCCH change notification; The device determines the specified search space according to the M-RNTI corresponding to the first secondary carrier, or the M-RNTI corresponding to the first secondary carrier and the carrier index of the first secondary carrier; and then, the network side device is in the specified search space.
  • the UE Transmitting the scrambled PDCCH or E-PDCCH to the UE, so that the UE can decode the scrambled PDCCH or E-PDCCH according to the specified search space determined by the M-RNTI based on the specified DCI format, and then based on
  • the MCCH change notification carried by the PDCCH or the E-PDCCH is used to learn the MCCH change corresponding to the first secondary carrier.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the network side device performs CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI of the first secondary carrier, and the M-RNTI, or the M-RNTI and the first corresponding to the first secondary carrier by the network side device.
  • the carrier index of a secondary carrier, the order of the processes between the specified search spaces is not limited.
  • the MCCH change notification is sent to all UEs that receive the PMCH corresponding to the MCCH through the PDCCH or the E-PDCCH in the current modification period.
  • the M-RNTI used for scrambling is pre-configured with the UE and pre-configured.
  • the network side device may determine the specified search space for the first secondary carrier according to the M-RNTI corresponding to the first secondary carrier and the carrier index of the first secondary carrier. Alternatively, the network side device may determine the specified search space for the first secondary carrier according to the M-RNTI corresponding to the first secondary carrier.
  • the carrier index may refer to a carrier index of the system level, or the carrier index may refer to a cell-specific carrier index, and the cell-specific carrier index is the same for all users.
  • the carrier index may also be a user-specific carrier index, that is, a carrier index configured by the upper layer to the user equipment.
  • the network side device may send only one MCCH change notification for multiple UEs, thereby saving the PDCCH. Or E-PDCCH resources.
  • the specified search space may be a common search space, that is, the MCCH change notification of the first secondary carrier is sent in the common search space, and for the CA user, usually only the primary carrier has a common search space;
  • the RNTI is a carrier-specific M-RNTI.
  • the carrier-specific M-RNTI of the first secondary carrier is mainly used, and the carrier-specific M-RNTI of different carriers is different.
  • the process of the network side device notifying the MCCH change includes: the network side device performs CRC scrambling on the PDCCH or the E-PDCCH by using the carrier-specific RNTI of the first secondary carrier, where the PDCCH or the E-PDCCH carries the MCCH change notification;
  • the side device sends the scrambled PDCCH or E-PDCCH to the UE in the common search space, so that the UE can decode the scrambled PDCCH or E-PDCCH in the common search space based on the specified DCI format, and then based on
  • the MCCH change notification carried by the PDCCH or the E-PDCCH is used to learn the MCCH change corresponding to the first secondary carrier.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the MCCH change notification is sent to all UEs that receive the PMCH corresponding to the MCCH through the PDCCH or the E-PDCCH in the current modification period.
  • the common search space and the carrier-specific RNTI of the first secondary carrier used for scrambling are pre-configured with the UE and pre-configured.
  • the network side device needs to scramble the carrier-specific RNTI of all configured first secondary carriers in a common search space corresponding to the primary carrier, and the operation can be performed in a specific subframe.
  • the network side device needs to send on the primary carrier of all UEs that receive the PMCH corresponding to the MCCH, that is, the MCCH change notification needs to be received, and each receives the MCCH.
  • the primary carrier of the UE of the corresponding PMCH is sent to each UE separately.
  • the non-MBSFN subframe of the primary carrier can also send an MCCH change notification.
  • the specified search space is a common search space; the designated RNTI is an M-RNTI; in this embodiment, the MCCH change notification corresponding to different carriers is
  • the specified information fields in the specified DCI format are distinguished.
  • the specified DCI format includes a first information field and a second information field, where the first information field is used to indicate a carrier corresponding to the PDCCH or the E-PDCCH, and the second information field is used to indicate an MCCH change notification.
  • the process of the network side device notifying the MCCH change includes: the network side device performs CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI, where the PDCCH or the E-PDCCH carries the MCCH change notification; the network side device is in the common search space. Transmitting the scrambled PDCCH or E-PDCCH to the UE, so that the UE can decode the scrambled PDCCH or E-PDCCH in a common search space based on the specified DCI format, and then based on the PDCCH or E-PDCCH
  • the MCCH change notification is used to learn the MCCH change corresponding to the first secondary carrier.
  • the first secondary carrier may refer to a secondary carrier carrying the PMCH corresponding to the MCCH.
  • the network side device indicates the first secondary carrier corresponding to the PDCCH or the E-PDCCH by setting the value of the first information field in the DCI format based on the PDCCH or the E-PDCCH, and is set based on the PDCCH or the E. - The value of the second information field in the DCI format carried by the PDCCH to indicate the MCCH change notification.
  • the first information domain may be a CIF.
  • the format 1C may include the following fields: an 8-bit second information field, used to indicate a MCCH change notification, a 3-bit CIF, and a reserved bit field. Whether the reserved bit field exists depends on whether the DCI format 1C needs to add 0 bits to be aligned with the payload size of the DCI format 1C for single PDSCH scheduling.
  • the pull-in refers to the load size corresponding to the DCI format 1C when indicating the MCCH change notification corresponding to the carrier, which is the same as the load size when used for single PDSCH scheduling. If a pull is required, the DCI format includes a reserved bit field, and if no alignment is required, the DCI format may not include a reserved bit field.
  • the M-RNTI is used to perform CRC scrambling on the PDCCH or EPDCCH carrying the MCCH change notification, and the M-RNTIs corresponding to all carriers may be the same or different.
  • the specified request space may be a common search space; the designated RNTI may be an M-RNTI; in this embodiment, the MCCH change corresponding to different carriers is distinguished by the transmission subframe of the MCCH change notification. Notice.
  • the process of the network side device notifying the MCCH change includes: the network side device sending a broadcast message to the UE, where the broadcast message carries the sending of the MCCH change notification corresponding to each carrier.
  • the information of the subframe, and the transmission subframe of the MCCH change notification corresponding to the at least two carriers is different.
  • the network side device performs CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI, where the PDCCH or the E-PDCCH carries the MCCH change notification; and then, the transmitter of the MCCH change notification corresponding to the first secondary carrier by the network side device
  • the PDCCH or the E-PDCCH is sent to the UE, so that the UE can perform the scrambling on the transmission subframe of the MCCH change notification corresponding to the first secondary carrier in the common search space.
  • the PDCCH or the E-PDCCH is decoded, and the MCCH change corresponding to the first secondary carrier is learned based on the MCCH change notification carried by the PDCCH or the E-PDCCH.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the broadcast message may be SIB13.
  • the network side device may notify the UE of the information about the transmission subframe of the MCCH change notification corresponding to each secondary carrier through the SIB13.
  • the M-RNTI is used to perform CRC scrambling on the PDCCH or EPDCCH carrying the MCCH change notification, and the M-RNTIs corresponding to all carriers may be the same or different.
  • the specified search space may be a common search space; the specified RNTI may be an M-RNTI; in this embodiment, the specified information field in the specified DCI format is used to distinguish different carriers. MCCH change notification.
  • the process of the network side device notifying the MCCH change includes: the network side device performs CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI corresponding to the first secondary carrier, where the PDCCH or the E-PDCCH carries the MCCH change notification; After that, the network side device sends the scrambled PDCCH or E-PDCCH to the UE in the common search space, so that the UE can use the M-RNTI pair to scramble the PDCCH or E in the common search space based on the specified DCI format.
  • the PDCCH is decoded, and the MCCH change corresponding to the first secondary carrier is learned based on the MCCH change notification of the PDCCH or the E-PDCCH.
  • the first secondary carrier may be a secondary carrier that carries the PMCH corresponding to the MCCH.
  • the DCCH format carried by the PDCCH or the E-PDCCH includes an MCCH change notification indication field.
  • the MCCH change notification indication field includes N bits, and each bit corresponds to one MCCH. When the bit value is 1, the MCCH corresponding to the bit changes, and the N bits correspond to N
  • the MCCH includes MCCHs corresponding to M carriers, N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2. This embodiment mainly uses a bitmap to indicate whether the MCCH corresponding to each carrier is sent. Changed.
  • the MCCHs corresponding to the M carriers may be numbered in a unified manner.
  • the MCCHs corresponding to the M carriers are sequentially numbered in the order of increasing or decreasing the carrier index.
  • the MCCH corresponding to the carrier with the low carrier index may be numbered first, and then The MCCH corresponding to the carrier with a high carrier index is numbered, and the N bits from the lower to the upper are sequentially associated with the MCCH whose number is from small to large.
  • the X MCCHs corresponding to the carriers may be first sorted, and the MCCHs corresponding to the M carriers are sorted in the order of increasing or decreasing the carrier index, and finally numbered. Based on this, the network side device can identify a certain MCCH change corresponding to a certain carrier by using a position of 1 bit in the N bits.
  • a mapping relationship between the N bits and the MCCH corresponding to the carrier may be generated in advance, and the MCCH corresponding to the certain bit and the carrier corresponding to the MCCH may be determined according to the mapping relationship.
  • the MCCH corresponding to the different carriers is distinguished by various methods, and the change notification is performed, so that the MCCH change notification corresponding to the secondary carrier can be identified, and the notification of the MCCH change corresponding to the secondary carrier is implemented, so that the secondary carrier can be configured.
  • FIG. 3 is a schematic structural diagram of a UE according to an embodiment of the present invention. As shown in FIG. 3, the UE includes: a decoding module 31 and an obtaining module 32.
  • the decoding module 31 is configured to decode the downlink control channel that is scrambled by using the specified RNTI in the specified search space according to the specified DCI format, where the downlink control channel carries the MCCH change notification.
  • the downlink control channel includes a PDCCH or an E-PDCCH.
  • the obtaining module 32 is connected to the decoding module 31, and is configured to learn the MCCH change based on the MCCH change notification carried by the downlink control channel.
  • the specified search space is a proprietary search space.
  • the proprietary search space is a proprietary search space corresponding to the secondary carrier.
  • the designated RNTI is a C-RNTI.
  • the UE further includes: a determining module 33.
  • the determining module 33 is configured to determine the specified search space according to the M-RNTI before the decoding module 31 performs decoding, or determine the specified search space according to the M-RNTI and the carrier index.
  • the determining module 33 is coupled to the decoding module 31 for providing the specified search space to the decoding module 31.
  • the carrier index may be a system-level carrier index, or the carrier index may be a cell-specific carrier index, where the cell-specific carrier index is the same for all users.
  • the carrier index may also be a user-specific carrier index, that is, a carrier index configured by the upper layer to the user equipment.
  • the specified search space is located on a secondary carrier, where the secondary carrier is a carrier that carries a PMCH corresponding to the MCCH.
  • the secondary carrier is a carrier that carries a PMCH corresponding to the MCCH.
  • the specified search space may also be located on the primary carrier.
  • the determining module 33 in the UE determines the specified search space according to the M-RNTI, if the value of the M-RNTI is not all the same for all carriers, the specified search space is located on the secondary carrier, that is, located on the MCCH.
  • the designated RNTI is the M-RNTI.
  • the specified search space is a common search space.
  • the designated RNTI is a carrier-specific M-RNTI, and the carrier-specific M-RNTIs corresponding to different carriers are different.
  • the specified search space is a common search space.
  • the transmission subframes of the MCCH change notifications corresponding to different carriers are set differently. Based on this, as shown in FIG. 4, the UE further includes: a receiving module 34.
  • the receiving module 34 is connected to the decoding module 31, and is configured to receive, by the decoding module 31, a broadcast message sent by the network side device, where the broadcast message carries a sending subframe that indicates an MCCH change notification corresponding to each carrier.
  • the information is different from the transmission subframe of the MCCH change notification corresponding to the at least two carriers.
  • the decoding module 31 is specifically configured to determine, according to the information of the transmission subframe indicating the MCCH change notification corresponding to each carrier, the transmission subframe of the MCCH change notification corresponding to each carrier, and the MCCH change notification corresponding to each carrier. And transmitting, on the transmitting subframe, the downlink control channel scrambled by using the specified RNTI in a specified search space based on the specified DCI format.
  • the specified DCI format includes a first information domain and a second information domain, where the first information domain is used to indicate a carrier corresponding to the downlink control channel, and the second information domain is used. Indicates the MCCH change notification.
  • the obtaining module 32 is specifically configured to learn, according to the value of the first information field in the DCI format carried by the downlink control channel, the carrier corresponding to the downlink control channel, and based on the second DCI format carried by the downlink control channel. The value of the information field is informed of the MCCH change corresponding to the carrier.
  • the specified DCI format is format 1C
  • the first information domain is a carrier indication domain CIF.
  • the specified DCI format includes an MCCH change notification indication field, where the MCCH change notification indication field includes N bits, and each bit corresponds to one MCCH, when the value of the bit is When the value is 1, the MCCH corresponding to the bit is changed.
  • the N MCCHs corresponding to the N bits include the MCCH corresponding to the M carriers, the N is an integer greater than or equal to 2, and the M is greater than or equal to An integer of 2.
  • the N MCCHs corresponding to the M carriers are numbered in the order of increasing or decreasing the carrier index, and the N bits from the lower bits to the upper bits are sequentially corresponding to the MCCHs that are numbered from small to large.
  • the X MCCHs corresponding to the carriers may be first sorted, and the MCCHs corresponding to the M carriers are sorted in the order of increasing or decreasing the carrier index, and finally numbered.
  • the obtaining module 32 is specifically configured to learn, according to the MCCH change notification carried by the downlink control channel, the MCCH change corresponding to the secondary carrier.
  • the function modules of the UE provided in this embodiment may be used to perform the process in the embodiment of the channel change learning method shown in FIG. 1.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the UE provided in this embodiment specifies the search space based on the specified DCI format, and specifies the use
  • the downlink control channel that is scrambled by the RNTI is decoded, and the MCCH change is learned based on the MCCH change notification carried by the downlink control channel, where the specified search space is no longer restricted to the common search space, so that the MCCH change notification corresponding to the secondary carrier can be obtained. Further, the notification of the change of the MCCH corresponding to the secondary carrier is implemented, so that the MBMS service can be performed on the secondary carrier, thereby improving the utilization of the carrier resource.
  • FIG. 5 is a schematic structural diagram of still another UE according to an embodiment of the present invention. As shown in FIG. 5, the UE includes: a decoder 51, a memory 52, and a processor 53.
  • the decoder 51 is configured to decode the downlink control channel that is scrambled by using the specified RNTI in the specified search space according to the specified DCI format, where the downlink control channel carries the MCCH change notification.
  • the downlink control channel may include a PDCCH or an E-PDCCH.
  • the memory 52 is used to store a program.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 52 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
  • the processor 53 is configured to execute the program stored in the memory 52, to: learn the MCCH change based on the MCCH change notification carried by the downlink control channel.
  • the processor 53 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
  • the UE further includes: a communication interface 54.
  • the communication interface 54 is primarily responsible for communication between the UE and other devices, such as for communication between the UE and the network side device. Specifically, the communication interface 54 can receive the downlink control channel that is sent by the network side device and is scrambled by using the specified RNTI.
  • the specified search space is a proprietary search space.
  • the proprietary search space is a proprietary search space corresponding to the secondary carrier.
  • the designated RNTI is a C-RNTI.
  • the processor 53 is further configured to determine the specified search space according to the M-RNTI before the decoder 51 performs decoding, or determine the specified search space according to the M-RNTI and the carrier index. The processor 53 supplies the specified search space to the decoder 51.
  • the carrier index may refer to a carrier index of a system level, or the carrier index may be a cell-specific carrier index, where the cell-specific carrier index is the same for all users.
  • the carrier index may also be a user-specific carrier index, that is, a carrier index configured by the upper layer for the user equipment.
  • the specified search space is located on a secondary carrier, where the secondary carrier is a carrier that carries a PMCH corresponding to the MCCH. It should be noted that when the processor 53 in the UE determines the specified search space according to the M-RNTI and the carrier index, the specified search space may also be located on the primary carrier.
  • the processor 53 in the UE determines the specified search space according to the M-RNTI, if the value of the M-RNTI is not the same for all carriers, the specified search space is located on the secondary carrier, that is, located on the MCCH. On the secondary carrier of the corresponding PMCH.
  • the designated RNTI is the M-RNTI.
  • the specified search space is a common search space.
  • the designated RNTI is a carrier-specific M-RNTI, and the carrier-specific M-RNTIs corresponding to different carriers are different.
  • the specified search space is a common search space.
  • the transmission subframes of the MCCH change notifications corresponding to different carriers are set differently.
  • the communication interface 54 is further configured to: before the decoding by the decoder 51, receive a broadcast message sent by the network side device, where the broadcast message carries information indicating a transmission subframe of the MCCH change notification corresponding to each carrier, and MCCH change notification corresponding to at least two carriers The transmitted subframe is different.
  • the decoder 51 is specifically configured to determine, according to the information of the transmission subframe indicating the MCCH change notification corresponding to each carrier, the transmission subframe of the MCCH change notification corresponding to each carrier, and the MCCH change notification corresponding to each carrier. And transmitting, on the transmitting subframe, the downlink control channel scrambled by using the specified RNTI in a specified search space based on the specified DCI format.
  • the specified DCI format includes a first information domain and a second information domain, where the first information domain is used to indicate a carrier corresponding to the downlink control channel, and the second information domain is used. Indicates the MCCH change notification.
  • the processor 53 is specifically configured to learn, according to the value of the first information field in the DCI format carried by the downlink control channel, the carrier corresponding to the downlink control channel, and based on the second DCI format carried by the downlink control channel. The value of the information field is informed of the MCCH change corresponding to the carrier.
  • the specified DCI format is format 1C
  • the first information field is a carrier indication field CIF.
  • the specified DCI format includes an MCCH change notification indication field, where the MCCH change notification indication field includes N bits, and each bit corresponds to one MCCH, when the value of the bit is When 1, the MCCH corresponding to the bit changes;
  • the N MCCHs corresponding to the N bits include MCCHs corresponding to M carriers, and the N is an integer greater than or equal to 2, and the M is an integer greater than or equal to 2.
  • the N MCCHs corresponding to the M carriers are numbered in the order of increasing or decreasing the carrier index, and the N bits from the lower bits to the upper bits are sequentially corresponding to the MCCHs that are numbered from small to large.
  • the X corresponding to the carrier may be first
  • the MCCH is sorted, and the MCCHs corresponding to the M carriers are sorted in the order of increasing or decreasing the carrier index, and finally, the numbers are unified.
  • the processor 53 is specifically configured to learn, according to the MCCH change notification carried by the downlink control channel, the MCCH change corresponding to the secondary carrier.
  • the decoder 51, the memory 52, the processor 53, and the communication interface 54 may be connected to each other through a bus. Complete communication with each other.
  • the bus may be an Industry Standard Architecture (ISA) bus, and an Interworking device (Peripheral).
  • PCI Component
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, Data bus, control bus, etc. For ease of representation, only one thick line is shown in Figure 5, but it does not mean that there is only one bus or one type of bus.
  • the decoder 51, the memory 52, the processor 53, and the communication interface 54 may pass The internal interface completes the same communication.
  • the UE provided in this embodiment can be used to perform the process in the embodiment of the channel change obtaining method shown in FIG. 1.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the UE provided in this embodiment decodes the downlink control channel scrambled by using the specified RNTI in the specified search space according to the specified DCI format, and learns the MCCH change based on the MCCH change notification carried by the downlink control channel, where the specified search is performed.
  • the space is no longer restricted to the common search space. Therefore, the MCCH change notification corresponding to the secondary carrier can be obtained, and the notification of the change of the MCCH corresponding to the secondary carrier can be implemented, so that the MBMS service can be performed on the secondary carrier, thereby improving the utilization of the carrier resource. .
  • FIG. 6 is a schematic structural diagram of a network side device according to an embodiment of the present invention. As shown in FIG. 6, the network side device includes: a scrambling module 61 and a sending module 62.
  • the scrambling module 61 is configured to scramble the downlink control channel by using the designated RNTI, where the downlink control channel carries the MCCH change notification.
  • the downlink control channel may include a PDCCH, or an E-PDCCH.
  • the sending module 62 is connected to the scrambling module 61, and configured to send the scrambled downlink control channel to the UE in the designated search space.
  • the specified search space is a proprietary search space.
  • the dedicated search space is a dedicated search space corresponding to the secondary carrier of the UE.
  • the designated RNTI is a C-RNTI.
  • the network side device further includes: a determining module 63.
  • a determining module 63 configured to determine, according to the M-RNTI of the UE, the specified search space before the sending module 62 sends the scrambled downlink control channel, or determine the specified search according to the M-RNTI and the carrier index of the UE. space.
  • the determining module 63 is coupled to the transmitting module 62 for providing the specified search space to the transmitting module 62.
  • the carrier index may refer to a carrier index at a system level, or the carrier index may be It is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.
  • the carrier index may also be a user-specific carrier index, that is, a carrier index configured by the upper layer to the user equipment.
  • the specified search space is located on a secondary carrier of the UE, where the secondary carrier is a carrier that carries the PMCH corresponding to the MCCH.
  • the secondary carrier is a carrier that carries the PMCH corresponding to the MCCH.
  • the specified search space may also be located on the primary carrier.
  • the determining module 63 in the network side device determines the specified search space according to the M-RNTI, if the value of the M-RNTI is not all the same for all carriers, the specified search space is located on the secondary carrier, that is, located at 7
  • the designated RNTI is the M-RNTI.
  • the specified cable space is a common search space.
  • the designated RNTI may be a carrier-specific M-RNTI, and the carrier-specific M-RNTIs corresponding to different carriers are different.
  • the specified cable space is a common search space.
  • the transmission subframes of the MCCH change notifications corresponding to different carriers may be different.
  • the sending module 62 is specifically configured to: before sending the scrambled downlink control channel, send a broadcast message to the UE, where the broadcast message carries information indicating a transmission subframe of the MCCH change notification corresponding to each carrier, And the transmission subframes of the MCCH change notification corresponding to the at least two carriers are different, and the scrambled downlink control channel is transmitted to the UE in the designated search space in the transmission subframe of the MCCH change notification corresponding to each carrier.
  • the DCI format corresponding to the downlink control channel includes a first information domain and a second information domain, where the first information domain is used to indicate a carrier corresponding to the downlink control channel, where the The second information domain user indicates the MCCH change notification.
  • the network side device distinguishes the MCCH change notification corresponding to the different carriers by using the specified information field in the DCI format corresponding to the downlink control channel.
  • the DCI format corresponding to the downlink control channel includes an MCCH change notification indication field, where the MCCH change notification indication field includes N bits, and each bit corresponds to one MCCH, when the bit When the value of the bit is 1, the MCCH corresponding to the bit is changed.
  • the N MCCHs corresponding to the N bits include the MCCH corresponding to the M carriers, and the N is an integer greater than or equal to 2.
  • M is an integer greater than or equal to 2.
  • the N MCCHs corresponding to the M carriers are incremented or decremented according to the carrier index.
  • the numbers are sequentially numbered, and the lower one to the upper one of the N bits correspond to the MCCH whose number is from small to large.
  • the X MCCHs corresponding to the carriers may be first sorted, and the MCCHs corresponding to the M carriers are sorted in the order of increasing or decreasing the carrier index, and finally numbered.
  • the network side device distinguishes the MCCH change notification corresponding to the different carriers by using the specified information field in the DCI format corresponding to the downlink control channel.
  • the network side device of this embodiment may be a base station, but is not limited thereto.
  • the function modules of the network side device provided in this embodiment may be used to perform the process in the embodiment of the channel change notification method in FIG. 2.
  • the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the network side device uses the specified RNTI to scramble the downlink control channel, and then sends the scrambled downlink control channel to the UE in the specified search space, so that the UE can perform the scrambled downlink based on the specified DCI format.
  • the control channel is decoded, and the MCCH change is learned based on the MCCH change notification carried by the downlink control channel.
  • the specified search space is no longer restricted to the common search space. Therefore, the MCCH change corresponding to the secondary carrier can be notified to the UE.
  • the notification of the change of the MCCH corresponding to the carrier enables the MBMS service to be performed on the secondary carrier, thereby improving the utilization of the carrier resource.
  • FIG. 8 is a schematic structural diagram of another network side device according to an embodiment of the present invention.
  • the network side device includes: a memory 81, a processor 82, and a communication interface 83.
  • the memory 81 is used to store a program.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 81 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
  • the processor 82 is configured to execute a program stored by the memory 81, configured to: scramble the downlink control channel by using a designated RNTI, where the downlink control channel carries an MCCH change notification.
  • the downlink control channel may include a PDCCH or an E-PDCCH.
  • the communication interface 83 is configured to send the scrambled downlink control channel to the UE in the specified search space.
  • the specified search space is a proprietary search space.
  • the dedicated search space is a dedicated search space corresponding to the secondary carrier of the UE.
  • the designated RNTI is a C-RNTI.
  • the processor 82 is further configured to: before the communication interface 83 sends the scrambled downlink control channel, determine the specified search space according to the M-RNTI of the UE, or according to the M-RNTI of the UE. And the carrier index determines the specified search space. Processor 82 provides the specified search space to communication interface 83.
  • the carrier index may refer to a carrier index of a system level, or the carrier index may be a cell-specific carrier index, where the cell-specific carrier index is the same for all users.
  • the carrier index may also be a user-specific carrier index, that is, a carrier index configured by the upper layer for the user equipment.
  • the specified search space is located on a secondary carrier of the UE, where the secondary carrier is a carrier that carries the PMCH corresponding to the MCCH.
  • the secondary carrier is a carrier that carries the PMCH corresponding to the MCCH.
  • the processor 82 in the network side device determines the specified search space according to the M-RNTI and the carrier index, the specified search space may also be located on the primary carrier.
  • the processor 82 in the network side device determines the specified search space according to the M-RNTI, if the value of the M-RNTI is not all the same for all carriers, the specified search space is located on the secondary carrier, that is, located at 7
  • the designated RNTI is the M-RNTI.
  • the specified cable space is a common search space.
  • the designated RNTI may be a carrier-specific M-RNTI, and the carrier-specific M-RNTIs corresponding to different carriers are different.
  • the specified cable space is a common search space.
  • the transmission subframes of the MCCH change notifications corresponding to different carriers may be different.
  • the communication interface 83 is specifically configured to send a broadcast message to the UE before transmitting the scrambled downlink control channel, where the broadcast message carries information indicating a transmission subframe of the MCCH change notification corresponding to each carrier, And the transmission subframes of the MCCH change notification corresponding to the at least two carriers are different, and the scrambled downlink control channel is transmitted to the UE in the designated search space in the transmission subframe of the MCCH change notification corresponding to each carrier.
  • the DCI format corresponding to the downlink control channel includes a first information domain and a second information domain, where the first information domain is used to indicate a carrier corresponding to the downlink control channel, where the The second information domain user indicates the MCCH change notification.
  • the network side device distinguishes the MCCH change notification corresponding to the different carriers by using the specified information field in the DCI format corresponding to the downlink control channel.
  • the DCI format corresponding to the downlink control channel includes an MCCH a change notification indication field, where the MCCH change notification indication field includes N bits, each bit corresponding to one MCCH, and when the value of the bit is 1, the MCCH corresponding to the bit changes;
  • the N MCCHs corresponding to the N bits include MCCHs corresponding to M carriers, the N is an integer greater than or equal to 2, and the M is an integer greater than or equal to 2.
  • the N MCCHs corresponding to the M carriers are numbered in the order of increasing or decreasing the carrier index, and the N bits from the lower bits to the upper bits are sequentially corresponding to the MCCHs that are numbered from small to large.
  • the X MCCHs corresponding to the carriers may be first sorted, and the MCCHs corresponding to the M carriers are sorted in the order of increasing or decreasing the carrier index, and finally numbered.
  • the network side device distinguishes the MCCH change notifications corresponding to different carriers by using the specified information field in the DCI format corresponding to the downlink control channel.
  • the memory 81, the processor 82, and the communication interface 83 can be connected to each other through a bus and complete communication with each other.
  • the bus can be an ISA bus, a PCI bus or an EISA bus.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 8, but it does not mean that there is only one bus or one type of bus.
  • the memory 81, the processor 82, and the communication interface 83 are integrated on one chip, the memory 81, the processor 82, and the communication interface 83 can complete the same communication through the internal interface.
  • the network side device provided in this embodiment may be used to perform the process in the embodiment of the channel change notification method in FIG. 2, and the specific working principle is not described here. For details, refer to the description of the method embodiment.
  • the network side device uses the specified RNTI to scramble the downlink control channel, and then sends the scrambled downlink control channel to the UE in the specified search space, so that the UE can perform the scrambled downlink based on the specified DCI format.
  • the control channel is decoded, and the MCCH change is learned based on the MCCH change notification carried by the downlink control channel.
  • the specified search space is no longer restricted to the common search space. Therefore, the MCCH change corresponding to the secondary carrier can be notified to the UE.
  • the notification of the change of the MCCH corresponding to the carrier enables the MBMS service to be performed on the secondary carrier, thereby improving the utilization of the carrier resource.
  • the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk or an optical disk.

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Abstract

Des modes de réalisation de la présente invention portent sur un procédé d'apprentissage de changement de canal, un procédé de notification et un dispositif. Le procédé d'apprentissage consiste à décoder, avec un UE, un canal de commande de liaison descendante brouillé par l'utilisation d'un RNTI spécifié dans un espace de recherche de notification de changement, l'espace de recherche de notification de changement se référant à un espace de recherche utilisé par un UE pour obtenir une notification de changement de MCCH correspondant à une porteuse supplémentaire ; et à acquérir, avec l'UE, à partir d'un format DCI correspondant au canal de commande de liaison descendante, des informations utilisées pour indiquer la notification de changement de DCCH correspondant à la porteuse supplémentaire. La solution technique selon la présente invention met en œuvre la notification de changement de MCCH correspondant à la porteuse supplémentaire, facilite l'exécution d'un service MBMS sur la porteuse supplémentaire et améliore l'utilisation d'une ressource de fréquence.
PCT/CN2013/070984 2013-01-25 2013-01-25 Procédé d'apprentissage de changement de canal, procédé de notification et dispositif WO2014113968A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201380035317.2A CN104412625B (zh) 2013-01-25 2013-01-25 信道变更获知方法、通知方法及设备
PCT/CN2013/070984 WO2014113968A1 (fr) 2013-01-25 2013-01-25 Procédé d'apprentissage de changement de canal, procédé de notification et dispositif

Applications Claiming Priority (1)

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PCT/CN2013/070984 WO2014113968A1 (fr) 2013-01-25 2013-01-25 Procédé d'apprentissage de changement de canal, procédé de notification et dispositif

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CN107734658A (zh) * 2016-08-11 2018-02-23 夏普株式会社 单小区多播业务的信息变更传输方法和设备
US10805918B2 (en) 2016-08-11 2020-10-13 Kt Corporation Multicast communication method and apparatus
CN107733625B (zh) * 2016-08-11 2021-08-20 株式会社Kt 多播通信方法和设备
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WO2023284376A1 (fr) * 2021-07-12 2023-01-19 华为技术有限公司 Procédé de notification de modification de service de multidiffusion et appareil de communication

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