WO2022147659A1 - Procédé d'indication de faisceaux de liaison montante et de liaison descendante pour agrégation de porteuses et dispositif de communication - Google Patents

Procédé d'indication de faisceaux de liaison montante et de liaison descendante pour agrégation de porteuses et dispositif de communication Download PDF

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Publication number
WO2022147659A1
WO2022147659A1 PCT/CN2021/070339 CN2021070339W WO2022147659A1 WO 2022147659 A1 WO2022147659 A1 WO 2022147659A1 CN 2021070339 W CN2021070339 W CN 2021070339W WO 2022147659 A1 WO2022147659 A1 WO 2022147659A1
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Prior art keywords
downlink
uplink
tci state
component carriers
mapping table
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PCT/CN2021/070339
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English (en)
Chinese (zh)
Inventor
田茂新
生嘉
黎添
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捷开通讯(深圳)有限公司
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Priority to CN202180089092.3A priority Critical patent/CN116686227A/zh
Priority to PCT/CN2021/070339 priority patent/WO2022147659A1/fr
Publication of WO2022147659A1 publication Critical patent/WO2022147659A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of wireless communication, and in particular, to an uplink and downlink beam indication method for carrier aggregation, a communication device, and a readable storage medium.
  • Beam management usually includes three aspects, beam measurement, beam reporting, and beam indication.
  • a 5G (NR) base station gNB
  • UE user equipment
  • the base station selects the best beam to indicate the transmission of the Physical Downlink Shared Channel (PDSCH).
  • PDSCH Physical Downlink Shared Channel
  • the dynamic beam indication of PDSCH is designed to reduce delay and overhead.
  • the dynamic beam indication is based on the transmission configuration indication (TCI) state related to the downlink reference signal, including the synchronization signal block (Synchronization signal block). Signal Block, SSB) and/or Channel State Information Reference Signal (CSI-RS), after the UE receives the indicated beam, the UE switches the current receive beam to the indicated beam.
  • TCI transmission configuration indication
  • SSB synchronization signal block
  • CSI-RS Channel State Information Reference Signal
  • the uplink and downlink beam indications are implemented by configuring TCI and high-level parameter SpatialrelationInfo respectively through Radio Resource Control (RRC).
  • RRC Radio Resource Control
  • the separate indication of the uplink and downlink beams requires the base station to configure both uplink and downlink signaling, which will cause delay and signaling overhead. Therefore, in Rel-17, the transmission mechanism of the uplink and downlink integrated beam indication is designed. Due to the limitation of radio frequency analog beam steering components, the limitation of simultaneous receiving and transmitting uplink and downlink beams on multiple component carriers (CCs) needs to be strengthened, and it is difficult for UEs to use different beams on different physical channels to receive and transmit signals. Therefore, it is necessary to design a unified common beam (Common Beam) indication for uplink and downlink.
  • Common Beam Common Beam
  • the UE For a communication system supporting carrier aggregation, the UE needs to decode the TCI configured by the high layer from different component carriers, that is, each component carrier performs independent beam management, which causes great computational complexity to the UE. This is because when each component carrier is configured with the physical downlink control channel PDCCH, the UE needs to decode the downlink receive beam from the PDCCH in each component carrier respectively.
  • PDCCH physical downlink control channel
  • the UE needs to decode the downlink receive beam from the PDCCH in each component carrier respectively.
  • one MAC (medium access control) CE (control element) signaling can be used to activate the TCI configured for these multiple component carriers at the same time.
  • a primary component carrier (Primary Component Carrier, PCC) will be established when the UE enters the initial connection.
  • PCC Primary Component Carrier
  • the uplink and downlink control channels can only be transmitted on the uplink PCC and the downlink PCC.
  • the UE decodes the TCI through the PCC it will perform cross-carrier scheduling on other component carriers, that is, the Secondary Component Carrier (SCC), so that the configured multiple component carriers use the same common beam.
  • SCC Secondary Component Carrier
  • the UE may apply a common beam in multiple component carriers, however this per-channel/resource/per-component carrier beam indication will lead to a large number of collision situations of Quasi Co-Located Type D (QCL-Type D, Quasi Co-Located Type D) . Moreover, the UE cannot keep track of a large number of links all the time, and in different component carriers, due to the large bandwidth and the large frequency interval between different component carriers, not all component carriers can use the same beam.
  • the present application also provides an uplink and downlink beam indication method for carrier aggregation, including:
  • the mapping table at least includes a mapping relationship between beam indices and component carriers;
  • the mapping table includes the beam index, the component carrier group index, and a mapping relationship between the component carriers.
  • the mapping table further includes a mapping relationship between the beam index and the beam group, the beam index is an uplink beam or a downlink beam, and the beam group is an uplink beam group or a downlink beam group.
  • the mapping table further includes a TCI state pool index and a mapping relationship between beam groups.
  • the mapping table further includes the mapping relationship between the downlink candidate beam index and the uplink TCI grouping and/or the mapping relationship between the uplink candidate beam index and the downlink TCI grouping.
  • the step of configuring the TCI state pool and the mapping table for the user equipment it also includes:
  • the first information reported by the user equipment is received, where the first information is used to indicate that all the component carriers cannot share the same beam for transmission.
  • mapping table is carried by system information SI.
  • the number of the component carriers is configured by radio resource control RRC signaling.
  • the step of configuring the TCI state pool and the mapping table for the user equipment it also includes:
  • the measurement information includes channel state information CSI and/or sounding reference signal SRS;
  • the TCI state pool and the mapping table are generated according to the measurement information.
  • the first indication only includes a TCI state pool activation instruction.
  • the first indication includes a TCI state pool activation instruction and downlink control information DCI.
  • the present application also provides an uplink and downlink beam indication method for carrier aggregation, the method is performed on the user equipment side, and includes:
  • the TCI state pool and the mapping table are called according to the first instruction, and corresponding beams are configured for the component carriers according to the calling result, and the mapping table at least includes a mapping relationship between beam indices and component carriers.
  • the component carriers that is not configured by the first indication, configure an indication beam configured for a component carrier with a close frequency interval to the component carrier.
  • the present application also provides an uplink and downlink beam indication method for carrier aggregation, the method is performed on the base station side, and includes:
  • the optimal beam According to the SRS signal or CSI information uploaded by the user equipment, select the optimal beam and send a beam indication to the user equipment
  • the present application also provides an uplink and downlink beam indication method for carrier aggregation, the method is performed on the user equipment side, and includes:
  • the beam indication sent by the base station is received, and the beams corresponding to the beam indication are configured for all component carriers for transmission.
  • the present application also provides a communication device, comprising: a processor and a communication circuit, the processor is connected to the communication circuit; the processor is configured to execute instructions to implement the above method.
  • the present application also provides a communication device, comprising: a processor and a communication circuit, wherein the processor is connected to the communication circuit; the processor is configured to execute instructions to implement the above method.
  • the present application also provides a readable storage medium storing instructions, which implement the above method when the instructions are executed.
  • the beneficial effect of the present application is that it solves the problem in the prior art that all component carriers are configured with only one common beam, and the transmission of some component carriers that do not fit with the common beam is damaged, and allocate another component carrier for this type of unsuitable component carrier. And by configuring the TCI state pool and mapping table, the beam indication of the base station is simplified, the instruction overhead is reduced, and the decoding complexity of the user equipment is reduced.
  • FIG. 1 is a schematic diagram of a beam link between a base station and a UE in the prior art
  • FIG. 2 is a schematic structural diagram of an embodiment of a wireless communication system or network of the present application
  • FIG. 3 is a schematic flowchart of a first embodiment of an uplink and downlink beam indication method for carrier aggregation performed on the base station side of the present application;
  • FIG. 4 is a schematic flowchart before step S100 in Embodiment 1 of the present application.
  • FIG. 5 is a schematic flowchart of a first embodiment of an uplink and downlink beam indication method for carrier aggregation performed on the user equipment side;
  • FIG. 6 is a schematic flowchart of another embodiment of an uplink and downlink beam indication method for carrier aggregation performed on the base station side of the present application
  • FIG. 8 is a schematic structural diagram of Embodiment 1 of a communication device of the present application.
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of a communication device of the present application.
  • FIG. 10 is a schematic structural diagram of an embodiment of a readable storage medium of the present application.
  • User equipment in this application may include or represent any portable computing device used for communication.
  • Examples of user equipment that may be used in certain embodiments of the described devices, methods and systems may be wired or wireless devices such as mobile devices, mobile phones, terminals, smart phones, portable computing devices, such as laptop computers , handheld devices, tablets, tablet computers, netbooks, personal digital assistants, music players, and other computing devices capable of wired or wireless communications.
  • FIG. 2 is a wireless communication of multiple network nodes 104a-104m (eg, base stations gNB) including core network 102 (or telecommunications infrastructure) with cells 106a-106m serving multiple wireless communication units 108a-108e (eg, UEs)
  • a schematic diagram of a system or network 100 .
  • a plurality of network nodes 104a-104m are connected to the core network 102 by links. These links may be wired or wireless (eg, radio communication links, fiber optics, etc.).
  • Core network 102 may include multiple core network nodes, network entities, application servers, or any other network or computing device that may communicate with one or more radio access networks including multiple network nodes 104a-104m.
  • network nodes 104a-104m are illustrated as base stations, which may be gNBs in a 5G network, for example but not limited to.
  • Each of the plurality of network nodes 104a-104m (eg, base stations) has a footprint, which is schematically represented in FIG. 2 for serving one or more user equipment for simplicity and by way of example and not limitation
  • UEs 108a-108e can receive services from wireless communication system 100, such as voice, video, audio, or other communication services.
  • the wireless communication system or network 100 may include or represent any one or more communication networks used for communication between UEs 108a-108e and other devices, content sources, or servers connected to the wireless communication system or network 100.
  • the core network 102 may also include or represent one or more communication networks, one or more network nodes, entities, elements, application servers, servers, base stations or other that are linked, coupled or connected to form the wireless communication system or network 100 Network equipment. Links or couplings between network nodes may be wired or wireless (eg, radio communication links, fiber optics, etc.).
  • the wireless communication system or network 100 and core network 102 may include any suitable combination of a core network and a wireless access network comprising network nodes or entities, base stations, access points, etc. that enable UEs 108a-108e, wireless communication system 100 and Communication between network nodes 104a-104m of core network 102, content sources, and/or other devices connected to system or network 100 is enabled.
  • An example of a wireless communication network 100 may be at least one communication network or a combination thereof including, but not limited to, one or more wired and/or wireless telecommunications networks, a core network(s), radio access network(s), computer network(s), data communication network(s), internet, telephone network, wireless network, such as WiMAX based on the IEEE 802.11 standard by way of example only , WLAN and/or Wi-Fi network, or Internet Protocol (Internet Protocol, IP) network, packet-switched network or enhanced packet-switched network, IP Multimedia Subsystem (IP Multimedia Subsystem, IMS) network or based on wireless, cellular or satellite Technology communication networks, such as mobile networks, Global System for Mobile Communications (GSM), GPRS networks, Wideband Code Division Multiple Access (W-CDMA), CDMA2000 or LTE/Advanced LTE communication network or any 2nd, 3rd, 4th or 5th generation and beyond type of communication network etc.
  • GSM Global System for Mobile Communications
  • W-CDMA Wideband Code Division Multiple Access
  • the wireless communication system 100 may be, by way of example only and not limited to, using cyclic prefix orthogonal frequency division multiplexing (CP- 5G communication network using OFDM) technology.
  • the downlink may include one or more communication channels for transmitting data from one or more gNBs 104a-104m to one or more UEs 108a-108e.
  • a downlink channel is a communication channel used to transmit data, eg, from gNB 104a to UE 108a.
  • each frame may be 10ms in length
  • each frame may be divided into multiple subframes.
  • each frame may include 10 subframes of equal length, wherein each subframe consists of multiple time slots (eg, 2 time slots) for transmitting data.
  • time slots e.g, 2 time slots
  • a subframe may include several additional special fields or OFDM symbols, which may include, by way of example only, downlink synchronization symbols, broadcast symbols and/or uplink reference symbols.
  • the present application provides an uplink and downlink beam indication method for carrier aggregation. As shown in FIG. 3 , the method is performed on the base station side, including:
  • Step S100 configures a TCI (Transmission Configuration Indication, transmission configuration indication) state pool and a mapping table for the user equipment, and the mapping table at least includes the mapping relationship between the beam index and the component carrier;
  • TCI Transmission Configuration Indication, transmission configuration indication
  • the term "UE” is used to refer to user equipment.
  • the base station sends system information SI to the UE, wherein the system information SI carries a mapping table.
  • the TCI state pool is obtained by the UE by decoding the DCI in the downlink PDCCH.
  • the mapping table includes a series of mutual mapping relationships between transmission configuration elements, which at least include the mapping relationship between beam indices and component carriers. For details, please refer to Scheme 1 below. , Table 1 to Table 8 in 3 and 4.
  • the first scheme is the design of joint beam indication for uplink and downlink component carriers
  • the second scheme is the design of different beam indications for the uplink and downlink component carriers
  • the third scheme is the design of configuring different beam indications for different component carriers.
  • the beam index is the index value of a certain beam, and can also be understood as the ID or serial number of a certain beam.
  • the definition and generation of component carriers are in the prior art, so this application will not describe them in detail here.
  • Step S200 sends a first indication to the user equipment, where the first indication is used to instruct the user equipment to invoke the TCI state pool and the mapping table to configure a corresponding beam for the component carrier.
  • the first indication includes CE (Control Element) signaling of the MAC (Medium Access Control) layer that activates the TCI state pool and/or DCI (Downlink Control Information) including beam indication.
  • CE Control Element
  • DCI Downlink Control Information
  • the base station sends the first indication to the UE, and the UE receives the first indication, calls the TCI state pool and the mapping table previously configured by the base station, and obtains the relevant configuration pointed to by the first indication, that is, the beam configuration corresponding to the component carrier.
  • An indication is to configure the corresponding beam for each component carrier for transmission. The correspondence between component carriers and beams is described in the mapping table.
  • the first indication of the beam is preferably a beam index to refer to a certain beam. Therefore, in the correspondence between the component carriers and the beams recorded in the mapping table, the beam indices are used to represent the beams. For details, please refer to Table 1 and Table 2 in Scheme 1.
  • the problem of damage to the transmission of some component carriers that are not compatible with the common beam caused by only configuring one common beam for all component carriers in the prior art is solved. and by configuring the TCI state pool and mapping table, the beam indication of the base station is simplified, the instruction overhead is reduced, and the decoding complexity at the UE side is reduced.
  • the mapping table includes the beam index, the component carrier group index, and a mapping relationship between the component carriers.
  • mapping table may further include a beam index, a group index, a mapping relationship between the downlink component carrier grouping and the uplink component carrier grouping.
  • the mapping table further includes a mapping relationship between the beam index and the beam group, the beam index is an uplink beam or a downlink beam, and the beam group is an uplink beam group or a downlink beam group.
  • the mapping table further includes a TCI state pool index and a mapping relationship between beam groups.
  • the mapping table further includes the mapping relationship between the downlink candidate beam index and the uplink TCI grouping and/or the mapping relationship between the uplink candidate beam index and the downlink TCI grouping.
  • mapping table may further include the mapping relationship between the uplink and downlink joint candidate beams and the TCI grouping indexes, for details, see Table 8 in the third solution.
  • the method before configuring the TCI state pool and the mapping table for the user equipment described in step S100, the method further includes:
  • Step S101 receives first information reported by the user equipment, where the first information is used to indicate that all the component carriers cannot share the same beam for transmission.
  • the base station does not need to configure the TCI state pool, and can directly send the beam indication to the UE through DCI, because all the component carriers can use the same beam
  • the base station configures the TCI state pool only when the UE reports to the base station that all component carriers cannot use the same beam.
  • mapping table is carried by system information SI.
  • the number of the component carriers is configured by radio resource control RRC signaling.
  • the method before the step of configuring the TCI state pool and the mapping table for the user equipment described in step S100, the method further includes:
  • Step S110 receives measurement information uploaded by the user equipment, where the measurement information includes channel state information CSI and/or sounding reference signal SRS.
  • Step S120 generates the TCI state pool and the mapping table according to the measurement information.
  • the base station needs to configure the TCI state pool and the mapping table according to the CSI and SRS uploaded by the UE as a reference, and also refers to the frequency between the component carriers to group the component carriers, and transmit the component carrier group, etc.
  • the configuration is added to the mapping table as a mapping element. For details, please refer to the descriptions of Schemes 1, 2 and 3.
  • the base station obtains the CSI and SRS uploaded by the UE, and can calculate the optimal beam corresponding to each component carrier according to the relevant preset performance criteria. Specifically, Schemes 1, 3, and 4 are described in detail below.
  • the first indication only includes the TCI state pool activation instruction.
  • the MAC CE signaling is used as the activation command of the TCI state pool to determine the state of the UE.
  • the pool is activated.
  • the UE calls the TCI state pool and the mapping table to find the corresponding beam according to the SRS or CSI, and applies the configuration mapped in the state pool where the corresponding beam is located.
  • the first indication includes a TCI state pool activation instruction and downlink control information DCI.
  • the DCI indication enables the UE to invoke the activated TCI state pool to obtain the beam configuration.
  • this application sets the DCI to transmit the TCI state pool to the UE in advance, and then when the beam indication is required.
  • the signaling overhead is reduced and the downlink load is reduced.
  • the present application also provides an uplink and downlink beam indication method for carrier aggregation. As shown in FIG. 5 , the method is performed on the user equipment side, including:
  • Step S300 receives the TCI state pool, the mapping table and the first indication sent by the base station;
  • Step S400 invokes the TCI state pool and the mapping table according to the first instruction, configures corresponding beams for the component carriers according to the invocation result, and the mapping table at least includes a mapping relationship between beam indices and component carriers.
  • the component carriers that is not configured by the first indication, configure an indication beam configured for a component carrier with a close frequency interval to the component carrier.
  • the method can solve the situation that the component carrier is not configured by the TCI state pool.
  • the present application also provides an uplink and downlink beam indication method for carrier aggregation. As shown in FIG. 6 , the method is performed on the base station side, including:
  • Step S500 receives second information reported by the user equipment, where the second information is used to indicate that all component carriers can use the same beam;
  • Step S600 selects an optimal beam according to the SRS signal or CSI information uploaded by the user equipment and sends a beam indication to the user equipment.
  • the present application also provides an uplink and downlink beam indication method for carrier aggregation, the method is performed on the user equipment side, and includes:
  • the beam indication sent by the base station is received, and the beams corresponding to the beam indication are configured for all component carriers for transmission.
  • the present application provides three design solutions to solve the problems set forth in the background art, and the specific implementation manners of the different solutions are described in detail below.
  • This scheme is one of them: joint beam design of uplink and downlink component carriers.
  • one applicable scenario is: all the configured component carriers can be used for both uplink and downlink transmission.
  • the uplink and downlink component carriers share a common beam.
  • the component carriers can be used for both uplink transmission and downlink transmission. Therefore, the component carriers are not distinguished between uplink and downlink.
  • the component carriers are not distinguished between uplink and downlink packets.
  • TCI Transmission Configuration Indication
  • TCI state pool Table 1 can be as follows:
  • the beam index that is, the index value of a certain beam
  • the index value can be in the form of a serial number, a digital ID or a serial number, etc., which can be like the Beam1 in the above table.
  • the beam is characterized by a reference signal, that is, sending according to the reference signal can form a corresponding beam.
  • the reference signal may be a downlink channel state information reference signal CSI-RS, or may be a sounding reference signal SRS of an uplink channel.
  • the grouping of component carriers is set by the base station. For example, in Table 1, CC0, CC1, and CC2 are grouped into group 1, and CC3 and CC4 are grouped into group 2. It should be noted that the grouping of component carriers depends on whether the base station receives the first information.
  • the first information is that the user equipment UE reports that multiple component carriers of the base station cannot use the same beam at the same time, so the base station only needs to group the component carriers.
  • TCI state pool configures the TCI state pool, establish a mapping table (such as Table 1) containing the mapping relationship between the component carrier group and the beam index, and provide other common beams for other component carriers that cannot use the common beam, and then solve the problem that multiple component carriers in the prior art only Applying the drawbacks such as quasi-co-location collision brought about by a common beam, allocate another public beam for the unsuitable component carriers.
  • a mapping table such as Table 1
  • the TCI state pool is configured by the base station.
  • the base station scans the downlink beams and sends the candidate beams selected after scanning to the UE.
  • the UE receives the candidate beams from the base station and starts to measure the channel state information (CSI), and then reports the measurement results to the base station. .
  • the UE actively uploads the uplink sounding reference information SRS.
  • the base station establishes the mapping between the beam index and the component carrier, and then can obtain the best beam corresponding to the component carrier, and establishes the mapping relationship between the component carrier and the beam, and sends the system information to the user.
  • Table 1 also adds the element of the component carrier group).
  • the optimal transmission beam corresponding to the component carriers CC0, CC1 and CC2 in the component carrier group 1 is Beam1
  • the optimal transmission beam corresponding to the component carriers CC3 and CC4 in the component carrier group 2 is Beam2.
  • the mapping relationship in this table is configured by the base station according to CSI or SRS.
  • the second applicable scenario of this solution is: when the configured component carriers can only be used for downlink or uplink transmission, in general, there are more downlink services than uplink services, so the number of downlink component carriers is greater than the number of uplink component carriers.
  • the multiple downlink component subcarriers configured by the base station can be combined into three component carrier groups, namely DL group1, DL group2 and DL group3, and the configured multiple uplink component carriers can be combined into two component carrier groups, respectively UL group1 and UL group2, the mapping relationship between the downlink component carrier and the uplink component carrier is shown in Table 2.
  • the base station uses RRC to configure the TCI state pool.
  • RRC Radio Resource Control
  • different component carrier groups are configured with the same TCI state pool, that is, when there is only one TCI state pool
  • MAC CE signaling is used. Activate the TCI state pool and get an indicator beam.
  • the UE receives the MAC CE signaling and activates only one TCI state pool. At this time, the UE selects the corresponding beam for the corresponding component carrier in the first and second scenarios according to the mapping relationship in 1 or Table 2, respectively.
  • the UE when the UE decodes the indicated Beam1 from a component carrier in DL group1 (or UL group1), it also schedules other component carriers in DL group1 (or UL group1) and UL group1 (or DL group1) through this component carrier All component carriers in group1).
  • the terminal UE needs to decode the DCI of each component carrier group.
  • the time may also be different, that is, the preset value of the scheduling time of different component carrier groups may be different, and there may be no TCI state in the DCI of a certain component carrier group.
  • the component carrier is scheduled by the indicated beams configured by the remaining component carriers (scheduling component carriers). Which component carrier is scheduled for a component carrier is determined by factors such as the frequency interval between the scheduling component carrier and the component carrier, the configured SCS of the scheduling component carrier, and the like.
  • the scheduling component carrier is the component carrier with the smallest interval from the component carrier; if the component carrier with the smallest frequency interval from the component carrier group has When there are more than one, as shown in Fig. 7, since the component carrier with higher SCS needs to be scheduled twice for the component carrier with lower SCS, the SCS is smaller than the SCS of the component carrier and the frequency interval with the component carrier group is the smallest. If there are multiple component carrier groups with the same SCS and the same frequency interval as the component carrier group, the beam of the component carrier with the lowest grouped carrier index is adopted.
  • the beneficial effects of this embodiment are: solving the problem in the prior art that all the component carriers are configured with only one common beam, and the transmission damage of some component carriers that are not compatible with the common beam is solved, and the allocation of this type of unsuitable component carriers is solved.
  • Another common beam is designed, and the TCI state pool is configured by designing cross-carrier scheduling, so that the decoding complexity of the user equipment is reduced.
  • the instruction overhead is reduced.
  • Scheme 2 Design of different beam indications for uplink and downlink component carriers
  • all the component carriers in the downlink are marked as CC0 ⁇ CC4 according to the frequency from low to high, which are divided into convenient descriptions and written as DL CC0 ⁇ DL CC4.
  • Low to high are marked as CC0 ⁇ CC2, and written as UL CC0 ⁇ ULCC2, respectively.
  • the downlink component carrier groups DL CC0 to DL CC4 use the same common beam
  • the uplink component carrier groups UL CC0 to UL CC2 use the same common beam.
  • the UE when the UE receives the candidate beam from the base station, it will measure the CSI, and then report it to the base station.
  • the TCI state pool is also configured with an uplink beam index, which corresponds to the uplink reference signal, so the terminal UE also The uplink beam scan will be performed and the SRS will be sent to the base station.
  • the base station When the base station receives the SRS of the UE, the base station will measure based on the SRS, and then send the sounding reference resource indication as the uplink beam indication to the UE. After receiving the CSI information and SRS signal reported from the UE, the base station configures the TCI state pool.
  • the downlink and uplink component carrier groups in the configured TCI state pool are configured with the same TCI state pool, use MAC CE signaling to activate the TCI state pool and obtain an indicator beam. If the downlink and uplink components in the configured TCI state pool are configured with the same TCI state pool. When the carrier group is configured with different TCI state pools, after using MAC CE to activate one or more TCI states, it is also necessary to use DCI signaling to indicate the activated TCI states, and then multiple component carriers share receive beams through cross-carrier scheduling.
  • the downlink CC0 and the uplink CC0 are used to schedule other components in the downlink and uplink component carrier groups, respectively. component carrier.
  • the UE uses the last indicated downlink or Up beam. For example, when there is no TCI in the DCI of the downlink component carrier group in the nth scheduling time slot or the scheduling time is less than the preset value, the downlink common beam configured in the n-1 scheduling time slots is used.
  • scheduling method of this scheme is the same as the scheduling method of the scheme 1, so it will not be described in detail here.
  • the terminal UE performs CSI measurement after receiving the downlink beam scan from the base station and selects the optimal beam to report to the base station.
  • the base station configures the mapping relationship between the downlink common beam and each beam of the uplink component carrier according to the reported CSI, as shown in Table 3.
  • the base station receives the reported CSI and selects DL Beam1 as the beam indication for multiple downlink component carriers, through the mapping relationship between the downlink common beam DL beam1 and UL beam group1 in the TCI state pool, the UL beam group1 is used at this time.
  • the multiple beams of UL CC0 to UL CC2 are respectively transmitted.
  • This default rank match is used in other embodiments of this application as well as in other tables.
  • the mapping table may further include the mapping relationship between the downlink beam and the uplink beam grouping.
  • the base station configures the mapping relationship between the uplink common beam and each beam of the downlink component carrier according to the received SRS.
  • the base station measures and obtains an optimal uplink common beam when it receives the uplink SRS from the UE, and sends a sounding reference resource indication to the UE for uplink beam indication. For example, when the best uplink common beam obtained by the upper SRS measurement is the UL beam1 and an indication is sent, at this time, the DL CC0 to DL CC4 are respectively received using the beams in the DL beam group1.
  • the mapping table may further include the mapping relationship between the uplink beam and the downlink beam grouping.
  • the UE When there is no TCI in the DCI of the downlink or uplink component carrier group, or when the scheduling time of the downlink or uplink component carrier group is less than the preset value, the UE adopts the last indicated downlink or uplink beam before the current scheduling time slot. For example, when there is no TCI in the DCI in the downlink component carrier group in the nth scheduling time slot or the scheduling time is less than a preset value, the downlink common beam in n-1 scheduling time slots is used.
  • Scheme 3 Different component carriers are configured with different beam indication designs.
  • each TCI state pool may include downlink reference signal CSI and uplink reference signal SRS.
  • the beams configured in the TCI state pool are respectively used to indicate the component carriers.
  • the uplink and downlink component carriers of the carrier aggregation system are marked as CC0 to CC5 in sequence.
  • the terminal user When the terminal user receives the downlink beam scan from the base station, it will measure the channel information status information (CSI) and report it to the base station. Since the uplink reference signal is also configured in the TCI resource pool, the terminal user will also perform the uplink beam scan. When the uplink reference signal SRS of the terminal user is reached, the base station performs measurement, and then sends the SRI to indicate the uplink transmission beam. After receiving the CSI information and SRS signal reported by the UE, the base station uses RRC to configure multiple TCI state pools. The reference signals configured in different TCI state pools may overlap or be completely different. After using the MAC CE to activate one or more TCI resources, it is also necessary to use DCI signaling to indicate an activated TCI resource. As shown in Table 5, when the TCI state pool index indicated by the DCI is TCI1, the beams in Beam group1 are used for data transmission of the component carriers CC0-CC5.
  • CSI channel information status information
  • the UE When there is no TCI resource in the DCI or when the scheduling time of the downlink or uplink component carrier group is less than the preset value, the UE adopts the last indicated downlink or uplink beam before the current scheduling time slot. For example, when there is no TCI in the DCI in the downlink component carrier group in the nth scheduling time slot or the scheduling time is less than a preset value, the downlink common beam in n-1 scheduling time slots is used.
  • the number of reference signals configured in the TCI state pool is less than the number of component carriers, that is, when the number of beams configured in the TCI state pool is less than the number of component carriers, the UE uses the component carrier with the lowest frequency interval with the lowest component carrier index. (CC index) of the component carrier beam.
  • the terminal UE performs beam scanning on different component carriers and selects the best beam to report to the base station.
  • the terminal UE also sends the uplink reference signal SRS to the base station through different component carriers, and the base station measures and sends the SRI to indicate the uplink transmission beam respectively.
  • the base station configures beams corresponding to different component carriers in different TCI state pools respectively.
  • the second mechanism is joint beam management between different component carriers.
  • the terminal UE When the terminal UE receives the downlink beam scan from the base station, it will measure the channel information state information (CSI) and select the best beam to report to the base station.
  • the base station passes RRC.
  • the mapping relationship between the configuration of the best downlink common beam and the TCI state pool configured with the uplink component carrier is shown in Table 6.
  • the UE performs uplink beam scanning, the base station receives the uplink reference signal SRS from the UE for measurement, and sends the SRI to indicate the uplink optimal beam, and the base station configures the mapping table of the mapping relationship between the uplink optimal beam and the downlink component carrier through RRC. As shown in Table 7.
  • the mapping table of the mapping relationship shown in Table 8 can also be configured by joint uplink and downlink beam scanning.
  • the base station When the base station receives the CSI and uplink reference signal SRS reported from the UE, it can be configured to the corresponding TCI state pool of the component carrier through the mapping relationship in Table 8.
  • the UE When there is no TCI resource in the DCI or when the scheduling time of the downlink or uplink component carrier group is less than the preset value, the UE adopts the last indicated TCI before the current scheduling time slot. For example, if TCI group1 is configured in the nth scheduling time slot, and TCI group2 is configured in the n-1th time slot, when there is no TCI in the DCI of a component carrier in the nth time slot or the scheduling time is less than the preset value, Adopt TCI group2.
  • the present application also provides a communication device, comprising: a processor 110 and a memory 120.
  • the processor 110 controls the operation of the communication device, and the processor 110 may also be referred to as a CPU (Central Processing Unit, central processing unit).
  • the processor 110 may be an integrated circuit chip with processing capability of signal sequence.
  • Processor 110 may also be a general purpose processor, digital signal sequence processor (DSP), application specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.
  • DSP digital signal sequence processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory 120 stores instructions and data required for the operation of the processor 110 .
  • the processor 110 is configured to execute instructions to implement the steps performed by the base stations in the embodiments and solutions one, two and three of the present application.
  • the second embodiment of the communication device of the present application includes: a processor 210 and a memory 220.
  • the processor 210 controls the operation of the communication device, and the processor 210 may also be referred to as a CPU (Central Processing Unit, central processing unit).
  • the processor 210 may be an integrated circuit chip, which has the processing capability of signal sequence.
  • Processor 210 may also be a general purpose processor, digital signal sequence processor (DSP), application specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components.
  • DSP digital signal sequence processor
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • Memory 220 stores instructions and data required for processor 210 to operate.
  • the processor 210 is configured to execute instructions to implement the methods executed on the side of the user equipment in each of the embodiments and solutions 1, 2, and 3 of the present application.
  • an embodiment of the readable storage medium of the present application includes a memory 310, and the memory 310 stores an instruction, and when the instruction is executed, implements the method provided by any embodiment of the present application and a possible combination thereof.
  • the memory 310 may include a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a flash memory (Flash Memory), a hard disk, an optical disk, and the like.
  • ROM read-only memory
  • RAM random access memory
  • flash Memory flash memory
  • the disclosed method and apparatus may be implemented in other manners.
  • the device implementations described above are only illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be other divisions for example, multiple units or components may be Combinations can either be integrated into another system, or some features can be omitted, or not implemented.
  • Another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or units, which may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this implementation manner.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may be individually physically included, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that make contributions to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium. , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, removable hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé d'indication de faisceaux de liaison montante et de liaison descendante, le procédé étant exécuté côté station de base, et comprenant : la configuration d'un groupe d'états TCI et d'une table de mappage pour un UE, le groupe d'états TCI comprenant au moins la relation de mappage entre un indice de faisceau et une porteuse composante ; et l'envoi d'une première instruction à l'UE, la première instruction étant utilisée pour donner l'instruction à l'UE d'appeler le groupe d'états TCI et la table de mappage pour configurer un faisceau correspondant pour la porteuse composante.
PCT/CN2021/070339 2021-01-05 2021-01-05 Procédé d'indication de faisceaux de liaison montante et de liaison descendante pour agrégation de porteuses et dispositif de communication WO2022147659A1 (fr)

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CN202180089092.3A CN116686227A (zh) 2021-01-05 2021-01-05 一种用于载波聚合的上下行波束指示方法及通信设备
PCT/CN2021/070339 WO2022147659A1 (fr) 2021-01-05 2021-01-05 Procédé d'indication de faisceaux de liaison montante et de liaison descendante pour agrégation de porteuses et dispositif de communication

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Citations (4)

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CN110809321A (zh) * 2018-08-06 2020-02-18 成都华为技术有限公司 接收和发送信号的方法以及通信装置
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CN110809321A (zh) * 2018-08-06 2020-02-18 成都华为技术有限公司 接收和发送信号的方法以及通信装置
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