WO2022147659A1 - 一种用于载波聚合的上下行波束指示方法及通信设备 - Google Patents

一种用于载波聚合的上下行波束指示方法及通信设备 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)
French (fr)
Inventor
田茂新
生嘉
黎添
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JRD Communication Shenzhen Ltd
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JRD Communication Shenzhen Ltd
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Priority to PCT/CN2021/070339 priority Critical patent/WO2022147659A1/zh
Priority to CN202180089092.3A priority patent/CN116686227A/zh
Publication of WO2022147659A1 publication Critical patent/WO2022147659A1/zh
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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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Abstract

本申请公开了一种上下行波束指示方法,所述方法执行于基站侧，包括:给用户设备配置TCI状态池及映射表，所述TCI状态池至少包括波束索引和分量载波之间的映射关系；向所述用户设备发送第一指示，所述第一指示用于指示所述用户设备调用所述TCI状态池及所述映射表，为所述分量载波配置相应波束。

Description

一种用于载波聚合的上下行波束指示方法及通信设备 【技术领域】
本申请涉及无线通信领域，尤其涉及一种用于载波聚合的上下行波束指示方法、通信设备及可读存储介质。
【背景技术】
在多输入多输出(Multiple-Input Multiple-Output,MIMO)通信系统中，波束管理增强的目标主要是降低时延和开销，波束管理通常包括三个方面，波束测量、波束报告和波束指示。首先，5G(NR)基站(gNB)扫描多个候选波束，然后将候选波束传输给用户设备(User Equipment,UE)，UE根据一些性能指标来测量这些波束。在波束测量之后，用户设备上报基站满足相关性能准则的波束。最后，基站选择最佳波束来指示物理下行链路共享信道(Physical Downlink Shared Channel,PDSCH)的传输。波束指示技术如图1所示，基站和UE之间的波束链路，以增强波束指示。
在Rel-15中，PDSCH的动态波束指示是为了减少时延和开销而设计的，动态波束指示基于与下行参考信号相关的传输配置指示(Transmission Configuration Indication,TCI)状态，包括同步信号块(Synchronization Signal Block,SSB)和/或信道状态信息参考信号(Channel State Information Reference Signal,CSI-RS)，UE接收指示波束后并将当前接收波束切换至指示波束。
在Rel-15/16中，上下行波束指示分别通过无线资源控制(Radio Resource Control,RRC)分别配置TCI和高层参数SpatialrelationInfo实现。上下行波束单独指示需要基站配置上下行两个信令,这样会导致延时和信令开销。因此在Rel-17中，设计上下行一体化波束指示的传输机制。由于射频模拟波束控制元件的限制，在多个分量载波(Component,CC)同时接收和发送上下行波束限制需要加强，并且UE很难在不同的物理信道上使用不同的波束来接收和传输信号。因此需要设计上下行统一的公共波束(Common Beam)指示。对于支持载波聚合的通信系统，UE需要从不同的分量载波中解码高层配置的TCI，即每个分量载波都进行独立的波束管理，这给UE造成较大的计算复杂度。这是因为每个分量载波都配置物理下行链路控制信道PDCCH时，UE需要分别从每个分量载波中的PDCCH解码出下行接收波束。在Rel-16中，如果所配置的多个分量载波应 用相同的TCI时，可以利用一个MAC(medium access control)CE(control element)信令同时激活配置这多个分量载波的TCI。对于上行传输，同样也支持利用一个MAC CE同时更新和指示一组物理层上行控制信道(Physical Uplink Control Channel,PUCCH)的空间关系。为了减小UE端的计算复杂度，当UE进入初始连接时会建立一个主分量载波(主小区)(Primary Component Carrier,PCC)，RRC配置的多个分量载波中，只有主分量载波与RRC连接，且上下行控制信道只能在上行PCC和下行PCC上传输。当UE通过PCC解码TCI后，会对其它的分量载波，即辅分量载波(Secondary Component Carrier,SCC)进行跨载波调度，实现所配置的多个分量载波采用同一个公共波束。
UE可以在多个分量载波中应用一个公共波束,然而这种每通道/资源/每分量载波波束指示将导致大量准共址D类型(QCL-Type D,Quasi Co-Located Type D)的碰撞情况。并且，UE无法一直保持着大量的链路追踪，以及在不同的分量载波中,由于带宽较大，不同分量载波间的频率间隔过大，并不是所有的分量载波都可以采用相同的波束。
【发明内容】
为解决上述问题，本申请还提供一种用于载波聚合的上下行波束指示方法，包括：
给用户设备配置TCI状态池及映射表，所述映射表至少包括波束索引和分量载波之间的映射关系；
向所述用户设备发送第一指示，所述第一指示用于指示所述用户设备调用所述TCI状态池及所述映射表，为所述分量载波配置相应波束。
可选的，所述映射表包括所述波束索引、所述分量载波组索引以及所述分量载波之间的映射关系。
可选的，所述映射表还包括所述波束索引与波束分组之间的映射关系，所述波束索引为上行波束或下行波束，所述波束分组为上行波束分组或下行波束分组。
可选的，所述映射表还包括TCI状态池索引以及波束分组之间的映射关系。
可选的，所述映射表还包括下行候选波束索引与上行TCI分组之间的映射关系和/或上行候选波束索引与下行TCI分组之间的映射关系。
可选的，所述给用户设备配置TCI状态池及映射表的步骤之前，还包括：
接收所述用户设备所上报的第一信息，所述第一信息用于表征所有所述分量载波不能共用同一波束进行传输。
可选的，所述映射表由系统信息SI承载。
可选的，所述分量载波的数量由无线资源控制RRC信令所配置。
可选的，所述给用户设备配置TCI状态池及映射表的步骤之前，还包括：
接收所述用户设备所上传的测量信息，所述测量信息包括信道状态信息CSI和/或探测参考信号SRS；
根据所述测量信息生成所述TCI状态池及所述映射表。
可选的，若所述TCI状态池的数量为1时，所述第一指示仅包含TCI状态池激活指令。
可选的，若所述TCI状态池的数量为多个时，所述第一指示包含TCI状态池激活指令和下行链路控制信息DCI。
本申请还提供一种用于载波聚合的上下行波束指示方法，所述方法执行于用户设备侧，包括：
接收基站所配置的TCI状态池、第一指示以及映射表；
根据所述第一指示调用所述TCI状态池及所述映射表，根据调用结果为分量载波配置相应的波束，所述映射表至少包括波束索引与分量载波之间的映射关系。
可选的，若存在至少一个所述分量载波未被所述第一指示所配置，则配置与该分量载波频率间隔相近的分量载波所配置的指示波束。
本申请还提供一种用于载波聚合的上下行波束指示方法，所述方法执行于基站侧，包括：
接收用户设备所上报的第二信息，所述第二信息用于表征所有分量载波能够使用同一波束；
根据所述用户设备所上传的SRS信号或CSI信息，选择最优波束并发送波束指示至所述用户设备
本申请还提供一种用于载波聚合的上下行波束指示方法，所述方法执行于用户设备侧，包括：
接收基站所发送的波束指示，为所有分量载波配置所述波束指示所对应的波束进行传输。
本申请还提供一种通信设备,包括:处理器和通信电路,所述处理器连接所述 通信电路；所述处理器用于执行指令以实现如上述的方法。
本申请还提供一种通信设备,包括:处理器和通信电路,所述处理器连接所述通信电路；所述处理器用于执行指令以实现如上述的方法。
本申请还提供一种可读存储介质,存储有指令,所述指令被执行时实现如上述的方法。
本申请的有益效果在于，解决了现有技术中所有分量载波仅配置一个公共波束所引起的部分与公共波束不适配的分量载波传输受损的问题，为该类不适配分量载波分配另外的公共波束，并且通过配置TCI状态池及映射表，简化基站波束指示，减小指令开销并降低用户设备解码复杂度。
【附图说明】
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。其中:
图1为现有技术中基站和UE之间的波束链路的示意图；
图2为本申请无线通信系统或网络一实施方式的结构示意图；
图3为本申请用于载波聚合的上下行波束指示方法实施例一执行于基站侧的流程示意图；
图4为本申请实施例一中步骤S100之前的流程示意图；
图5为本申请用于载波聚合的上下行波束指示方法实施例一执行于用户设备侧的流程示意图；
图6为本申请用于载波聚合的上下行波束指示方法另一实施例执行于基站侧的流程示意图
图7为方案一中跨载波调度的示意图；
图8为本申请通信设备实施例一的结构示意图；
图9为本申请通信设备实施例二的结构示意图；
图10为本申请可读存储介质一实施例的结构示意图。
【具体实施方式】
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,以下各实施例中不冲突的可以相互结合。显然,所描述的实施例仅是本申请的一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
本申请中的“用户设备”可以包括或代表用于通信的任何便携式计算设备。在所描述的设备,方法和系统的某些实施例中可使用的用户设备的示例可以是有线或无线设备,例如移动设备,移动电话,终端,智能电话,便携式计算设备,诸如膝上型电脑,手持设备,平板,平板电脑,上网本,个人数字助理,音乐播放器以及能够进行有线或无线通信的其他计算设备。
图2是包括核心网102(或电信基础设施),具有服务于多个无线通信单元108a-108e(例如UE)的小区106a-106m的多个网络节点104a-104m(例如基站gNB)的无线通信系统或网络100的示意图。多个网络节点104a-104m通过链路连接到核心网102。这些链路可以是有线或无线的(例如无线电通信链接、光纤等)。核心网102可包括多个核心网络节点,网络实体,应用服务器或可以与包括多个网络节点104a-104m的一个或多个无线接入网络进行通信的任何其他网络或计算设备。
在本示例中,网络节点104a-104m被示意为基站,例如但不限于,其在5G网络中可以是gNB。多个网络节点104a-104m(例如,基站)中的每个都具有足迹(footprint),为简化且例如但不限于,其在图2中示意性地表示用于服务于一个或多个用户设备UE 108a-108e的对应的圆形小区106a-106m。UE 108a-108e能够从无线通信系统100接收服务,例如声音、视频、音频或其他通信服务。
无线通信系统或网络100可以包括或代表用于UE 108a-108e与其他设备、内容源或连接无线通信系统或网络100的服务器之间的通信的任意一个或多个通信网络。核心网102也可以包括或代表链接,耦接或连接以形成无线通信系统或网络100的一个或多个通信网络,一个或多个网络节点,实体,元素,应用程序服务器,服务器,基站或其他网络设备。网络节点之间的链接或耦接可以是有线或无线的(例如无线电通信链接、光纤等)。该无线通信系统或网络100以及核心网102可以包括包含网络节点或实体的核心网络和无线接入网络的任何适当组合, 基站,接入点等,其使得UE 108a-108e、无线通信系统100和核心网102的网络节点104a-104m、内容源和/或连接到系统或网络100的其他设备之间能够通信。
可在所描述的设备,方法和系统一些实施例中使用的无线通信网络100的示例可以是至少一个通信网络或其组合,包括但不限于,一个或多个有线和/或无线电信网络,一个或多个核心网,一个或多个无线接入网络,一个或多个计算机网络,一个或多个数据通信网络,互联网,电话网络,无线网络,例如基于仅作为示例的IEEE802.11标准的WiMAX、WLAN和/或Wi-Fi网络,或互联网协议(Internet Protocol,IP)网络,分组交换网络或增强型分组交换网络,IP多媒体子系统(IP Multimedia Subsystem,IMS)网络或基于无线、蜂窝或卫星技术的通信网络,诸如移动网络,全球移动通信系统(Global System for Mobile Communications,GSM),GPRS网络,宽带码分多址接入(Wideband Code Division Multiple Access,W-CDMA),CDMA2000或LTE/高级LTE通信网络或任何第二代,第三代,第四代或第五代和超越类型的通信网络等。
在图2的示例中,该无线通信系统100可以是,仅作为示例但不限于,使用下行链路和上行链路信道的循环前缀正交频分复用(cyclic prefix orthogonal frequency division multiplexing,CP-OFDM)技术的5G通信网络。下行链路可以包括用于将数据从一个或多个gNB 104a-104m传输到一个或多个UE 108a-108e的一个或多个通信信道。通常下行链路信道是用于传输数据的通信信道,例如,从gNB 104a到UE 108a。
用于5G网络的上行链路和下行链路均被分成无线帧(例如,每个帧可以是10ms的长度),其中每个帧可以被分成多个子帧。例如,每个帧可以包括10个长度相等的子帧,其中每个子帧由用于传输数据的多个时隙(例如2个时隙)组成。除了时隙之外,子帧可以包括若干额外的特殊字段或OFDM符号,其可包括,仅作为示例,下行链路同步符号,广播符号和/或上行链路参考符号。
实施例一
本申请提供一种用于载波聚合的上下行波束指示方法，如图3所示，所述方法执行于基站侧，包括：
步骤S100给用户设备配置TCI(Transmission Configuration Indication,传输配置指示)状态池及映射表，所述映射表至少包括波束索引和分量载波之间的映射关系；
为便于描述，使用术语“UE”指代用户设备。具体的，在UE进入某小区 时，基站向UE发送系统信息SI，其中系统信息SI承载有映射表。而TCI状态池为UE通过下行PDCCH中DCI解码得到，映射表包含一系列传输配置元素之间的相互映射关系，其至少包括波束索引和分量载波之间的映射关系，具体可参见下文中方案一、三、四中的表1-表8。
方案一为上下行分量载波联合波束指示设计，方案二为上下行分量载波不同波束指示设计，方案三为不同分量载波配置不同波束指示设计。其中各实施例方案的设置条件和具体配置在下文中详细描述，各实施例方案可相互组合或独立存在，本申请对此不作限定。
波束索引为某个波束的索引值，也可以理解为某个波束的ID或者序号。分量载波的定义和生成为现有技术，因此本申请在此对其不进行详细说明。
步骤S200向所述用户设备发送第一指示，所述第一指示用于指示所述用户设备调用所述TCI状态池以及所述映射表，为所述分量载波配置相应波束。
第一指示包括激活TCI状态池的MAC(Medium Access Control)层的CE(Control Element)信令和/或包含波束指示的DCI(Downlink Control Information)。第一指示仅包含MAC CE还是包含MAC CE和DCI视TCI状态池的数量而定，具体下文中进行阐述。
基站向UE发送第一指示，UE接收到第一指示，调用先前基站所配置的TCI状态池以及映射表，得到第一指示所指向的相关配置，即分量载波所对应的波束配置，UE根据第一指示为各分量载波配置所对应的波束进行传输。分量载波与波束的对应关系记载于映射表中。
其中，第一指示对波束的指示优选使用波束索引来指代某个波束。因而，映射表中所记载的分量载波与波束的对应关系中，采用波束索引来表征波束。具体可参见方案一中的表1和表2。
通过实施本实施例方案，解决了现有技术中所有分量载波仅配置一个公共波束所引起的部分与公共波束不适配的分量载波传输受损的问题，为该类不适配分量载波分配另外的公共波束，并且通过配置TCI状态池及映射表，简化基站波束指示，减小指令开销并降低UE端解码复杂度。
可选的，所述映射表包括所述波束索引、所述分量载波组索引以及所述分量载波之间的映射关系。
具体的，可参见方案一中的表1。另外，映射表还可以包括波束索引，分组索引，下行分量载波分组以及上行分量载波分组之间的映射关系。
可选的，所述映射表还包括所述波束索引与波束分组之间的映射关系，所述波束索引为上行波束或下行波束，所述波束分组为上行波束分组或下行波束分组。
具体的，可参见方案二中的表3和表4。
可选的，所述映射表还包括TCI状态池索引以及波束分组之间的映射关系。
具体的，可参见方案三中的表5。
可选的，所述映射表还包括下行候选波束索引与上行TCI分组之间的映射关系和/或上行候选波束索引与下行TCI分组之间的映射关系。
具体的，可参见方案三中的表6和表7。另外，映射表还可以包括上下行联合候选波束以及TCI分组索引之间的映射关系，具体可参见方案三中的表8。
可选的，步骤S100所述给用户设备配置TCI状态池及映射表之前，还包括：
步骤S101接收所述用户设备所上报的第一信息，所述第一信息用于表征所有所述分量载波不能共用同一波束进行传输。
具体的，若UE向基站上报所有分量载波可以使用同一波束，即一个波束进行传输，则基站无需配置TCI状态池，直接通过DCI发送波束指示至UE即可，因为所有的分量载波都可以使用同一波束进行传输，而只有UE向基站上报所有分量载波不能使用同一波束时，基站才配置TCI状态池。
可选的，所述映射表由系统信息SI承载。
可选的，所述分量载波的数量由无线资源控制RRC信令所配置。
可选的，如图4所示，步骤S100所述给用户设备配置TCI状态池及映射表的步骤之前，还包括：
步骤S110接收所述用户设备所上传的测量信息，所述测量信息包括信道状态信息CSI和/或探测参考信号SRS。
步骤S120根据所述测量信息生成所述TCI状态池及所述映射表。
具体的，基站需要根据UE所上传的CSI和SRS作为参考，来配置TCI状态池及映射表，并且另外还会参考分量载波之间的频率而进行对分量载波进行分组，将分量载波组等传输配置作为一个映射元素加入映射表中。具体可参见方案一、二、三的说明。
基站得到UE所上传的CSI和SRS，可以根据相关预置的性能准则计算得出每个分量载波所对应的最优的波束。具体下文方案一、三、四中有具体描述。
可选的，若所述TCI状态池的数量为1时，所述第一指示仅包含TCI状态 池激活指令。
具体的，若所述TCI状态池的数量为1个时，即当不同的分量载波组配置相同的TCI状态池时，此时利用MAC CE信令作为TCI状态池的激活指令，对UE的状态池进行激活，激活后UE自行根据SRS或CSI，调用TCI状态池及映射表查找对应的波束，并应用对应波束所在状态池中所映射的配置。
可选的，若所述TCI状态池的数量为多个时，所述第一指示包含TCI状态池激活指令和下行链路控制信息DCI。
具体的，若所述TCI状态池的数量为多个时，即当不同分量载波组配置不同的TCI状态池时，此时通过MAC CE信令激活一个或多个TCI状态池后，还需要利用DCI指示以使UE调用激活后的TCI状态池得到波束配置。
考虑到DCI承载信息有限，若TCI状态池有多个，DCI临时发送TCI状态池将会引起较大的负载，因而本申请设置预先由DCI传输TCI状态池至UE，之后待需进行波束指示时利用MAC CE信令激活UE中已接收的的TCI状态池，减小信令开销的同时进而减少下行负载。
本申请还提供一种用于载波聚合的上下行波束指示方法，如图5所示，所述方法执行于用户设备侧，包括：
步骤S300接收基站所发送的TCI状态池、映射表以及第一指示；
步骤S400根据所述第一指示调用所述TCI状态池及所述映射表，根据调用结果为分量载波配置相应的波束，所述映射表至少包括波束索引与分量载波之间的映射关系。
可选的，若存在至少一个所述分量载波未被所述第一指示所配置，则配置与该分量载波频率间隔相近的分量载波所配置的指示波束。
具体的，若存在部分分量载波未被TCI状态池所配置的情况下，则为其配置与该分量载波频率间隔相近的分量载波所配置的指示波束，在方案一中有具体描述，通过实施该方法能够解决存在分量载波未被TCI状态池所配置的情况。
本申请还提供一种用于载波聚合的上下行波束指示方法，如图6所示，所述方法执行于基站侧，包括：
步骤S500接收用户设备所上报的第二信息，所述第二信息用于表征所有分量载波能够使用同一波束；
步骤S600根据所述用户设备所上传的SRS信号或CSI信息，选择最优波束并发送波束指示至所述用户设备。
本申请还提供一种用于载波聚合的上下行波束指示方法，所述方法执行于用户设备侧，包括：
接收基站所发送的波束指示，为所有分量载波配置所述波束指示所对应的波束进行传输。
本申请为解决背景技术中所阐述问题设计有三种设计方案，下面分别对不同的方案的具体实现方式进行详细描述。
方案一
本方案为其中之一：上下行分量载波联合波束设计。
本方案又分两种适用场景，其一适用场景为：所配置的所有分量载波既可以用于上行又可以用于下行传输。
具体的，在本方案中，上下行分量载波共用一个公共波束，鉴于本方案适用场景，分量载波即可用于上行传输，也可用于下行传输，因此不对分量载波进行区分上下行，进而在对应的TCI状态池的设计中不对分量载波进行上下行分组区分。
TCI，即传输配置信息(Transmission Configuration Indication，TCI)，而本方案所讲述的TCI状态池可包含波束索引、分量载波组索引以及分量载波之间的映射关系，示例性的，本方案TCI状态池可如下表1：
波束索引 分量载波组索引 分量载波
Beam1 Group1 CC0,CC1,CC2
Beam2 Group2 CC3,CC4
表1
其中，波束索引，即某个波束的索引值，该索引值可以是编号、数字ID或者序号等形式可如同上表Beam1，波束通过一个参考信号进行表征，即按照该参考信号进行发送可以形成相应波束。本实方案中，所述参考信号可以是下行信道状态信息参考信号CSI-RS，也可以是上行信道的探测参考信号SRS。
分量载波的分组由基站进行设置，例如表1，CC0,CC1,CC2分为组1，而CC3，CC4分为组2。需要注意的是，分量载波的分组视基站是否接收到第一信息而定，所述第一信息为用户设备UE上报基站多个分量载波不能同时采用同一波束，因此基站才需对分量载波分组，并配置TCI状态池，建立包含分量载波分组与波束索引映射关系的映射表(如表1)，为不能采用公共波束的其他分量载波配备其它公共波束，进而解决现有技术中多个分量载波仅适用一个公共波 束所带来的准共址碰撞等弊端，为不适配的分量载波另行分配公共波束。
其中，所述TCI状态池由基站所配置。
在TCI状态池配置之前，基站对下行波束进行扫描并将扫描后选择的候选波束发送给UE，UE接收到来自基站的候选波束开始进行信道状态信息(CSI)测量，然后将测量结果上报给基站。又或者UE主动上传上行的探测参考信息SRS。基站根据接收到CSI或SRS，建立波束索引与分量载波之间的映射，进而能够得到分量载波所对应的最佳波束，并为分量载波建立与该波束的映射关系，并通过系统信息发送给用户设备，可参见同表1及方案2、3中的表(表1还添加了分量载波组这个元素)。进一步的，在表1中，分量载波组1中的分量载波CC0,CC1,CC2对应的最佳传输波束为Beam1，分量载波组2中的分量载波CC3,CC4对应的最佳传输波束为Beam2。该表中的映射关系由基站根据CSI或SRS进行配置。
接续表1示例，此时基站通过RRC配置L(L>1)个分量子载波和K个波束，例如当L＝5时，将所有的分量载波按照频率由低到高分别为标记为CC0～CC5。考虑每个分量载波之间的频率间隔而不一定能采用同一个公共波束，这里假设CC0,CC1和CC2可以采用Beam1进行上下行传输，组合为Group1,CC3和CC4采用Beam2进行上下行传输，合并为Group2，如表1所示，UE端接收基站相关指示后，采用Beam1用于分量载波CC0,CC1和CC2的传输，采用Beam2用于分量载波CC3,CC4的传输。
本方案第二个适用场景为：当所配置的分量载波只能用于下行或者上行传输时，通常情况下，下行业务多于上行业务，因此下行的分量载波数量要大于上行分量载波数量。例如，基站配置的下行多个分量子载波可以组合成三个分量载波组，分别为DL group1,DL group2和DL group3,配置的多个上行分量载波可以组合两个分量载波组，分别为UL group1和UL group2，下行分量载波和上行分量载波的映射关系如表2所示。
波束索引 分组索引 下行CC分组 上行CC分组
Beam1 Group1 DL group1 UL group1
Beam2 Group2 DL group2 UL group2
Beam3 Group3 DL group 3 UL group2
表2
具体的，例如，如表1和表2所示。当基站接收到来自UE上报的CSI信息或者SRS信号后，基站利用RRC配置TCI状态池，当不同的分量载波组配置相同的TCI状态池时，即TCI状态池只有一个时，利用MAC CE信令对TCI状态池进行激活并得到一个指示波束。UE接收到MAC CE信令，激活仅有一个的TCI状态池，此时UE根据1或者表2中的映射关系分别在第一和第二场景下为相应的分量载波选择对应的波束。当不同分量载波组配置不同的TCI状态池时，即MAC CE激活一个或者多个TCI状态池后，还需要利用DCI信令指示一个激活的TCI状态池，然后通过跨载波调度实现多个分量载波共享接收波束。例如，在表1，当UE从CC0和CC3的DCI中解码指示中的Beam1和Beam2时，也分别通过CC0和CC3调度Group1和Group2中的其它分量载波。同样表2中，当UE从DL group1(或UL group1)中某个分量载波解码指示的Beam1时，也通过该分量载波调度DL group1(或UL group1)中的其它分量载波和UL group1(或DL group1)中的所有分量载波。
可选的，在部分特殊情况下，例如，由于RRC对每一个分量载波组所配置的子载波间隔(Sub-Carrier Space,SCS)可能不同,因此终端UE解码每一个分量载波组DCI所需要的时间也有可能不同，即不同的分量载波组的调度时间预设值可能不同，而且在某一个分量载波组的DCI可能不存在TCI状态。此时该分量载波则由其余分量载波(调度分量载波)所配置的指示波束进行调度。而分量载波究竟有哪个分量载波调度，由调度分量载波与该分量载波的频率间隔以及调度分量载波的所配置的SCS等因素而定。
假设分量载波调度时间小于调度预设值，或者分量载波不存在TCI状态池时，此时调度分量载波是与该分量载波间隔最小的分量载波；如果与该分量载波组频率间隔最小的分量载波有多个时，如图7所示，由于具有较高SCS的分量载波调度具有较低SCS的分量载波需要进行两次调度，因此采用SCS比该分量载波SCS小且与该分量载波组频率间隔最小的分量载波组的波束；如果有多个具有相同SCS且与该分量载波组频率间隔相同的分量载波组，则采用具有最低分组载波索引的分量载波的波束。
本实施例的有益效果为：解决了现有技术中所有分量载波仅配置一个公共波束所引起的部分与公共波束不适配的分量载波传输受损的问题，为该类不适配分量载波分配另外的公共波束，并且通过设计跨载波调度，配置TCI状态池，使得用户设备解码复杂度变小另外对于基站侧而言，减少了指令开销。
方案二：上下行分量载波不同波束指示设计
此方案中，多个下行分量载波和上行分量载波分别采用不同公共波束，与方案一相似，示例性的，基站通过RRC配置L(L>1)个分量载波和K(K>＝1)个用于分量载波传输的波束，下行所有的分量载波按照频率的由低到高分别为标记为CC0～CC4，分了方便描述，写为DL CC0～DL CC4,上行所有的分量载波按照频率的由低到高分别为标记为CC0～CC2，写为UL CC0～ULCC2,。其中下行分量载波组DL CC0～DL CC4采用同一个公共波束，上行分量载波组UL CC0～UL CC2采用同一个公共波束。
在载波聚合系统中，当UE接收到来自基站的候选波束后会进行CSI测量，然后上报给基站，该方案中TCI状态池中也配置了上行波束索引，对应上行的参考信号,因此终端UE也会执行对上行波束扫描并发送SRS至基站，当基站收到了UE的SRS时，基站基于SRS进行测量，然后发送探测参考资源指示作为上行波束指示给UE。当基站接收到来自UE上报的CSI信息和SRS信号后，配置TCI状态池。若配置的TCI状态池中下行和上行分量载波组配置相同的TCI状态池时，利用MAC CE信令对TCI状态池进行激活并得到一个指示波束,若所配置的TCI状态池中下行和上行分量载波组配置不同的TCI状态池时，在利用MAC CE激活一个或者多个TCI状态后，还需要利用DCI信令指示激活的TCI状态，然后通过跨载波调度实现多个分量载波共享接收波束。例如，接续上述示例，当UE分别从下行CC0和上行CC0的PDCCH(DCI)中解码TCI状态指示的下行波束和上行波束时，分别通过下行CC0和上行CC0调度下行和上行分量载波组中的其它分量载波。当下行或者上行分量载波组中的DCI指示中不存在TCI时，或者当下行或者上行分量载波组的调度时间小于调度时间预设值时，UE采用当前调度时隙之前最近一次的指示的下行或者上行波束。例如，第n个调度时隙中下行分量载波组中DCI不存在TCI或者调度时间小于预设值时，采用n-1个调度时隙中所配置的下行公共波束。
另外，本方案调度与方案一调度方法相同，因而在此不作详细描述。
由于并不是所有的分量载波都能采用相同波束，当只有下行的分量载波执行载波聚合时，终端UE接收到来自基站的下行波束扫描后对进行CSI测量并选择最优波束上报给基站。基站根据上报的CSI配置下行公共波束和上行分量载波的各个波束之间映射关系，如表3所示。当基站接收到上报的CSI并选择DL  Beam1作为对下行多个分量载波的波束指示时，通过TCI状态池中下行公共波束DL beam1和UL beam group1之间的映射关系，此时利用UL beam group1中的多个波束分别传输UL CC0～UL CC2。可选的，按默认顺位配置CC0-CC2，如同表3，若指示波束为DL beam1,则按TCI状态池中对应的上行波束分组元素顺序配置UL CC0～UL CC2,即Beam1配置UL CC0,Beam2配置UL CC1，Beam3配置UL CC2。该默认顺位匹配使用于本申请的其他实施例以及其他表格。
下行波束索引 上行波束分组
DL beam1 UL beam group1＝{Beam1,Beam2,Beam3}
DL beam2 UL beam group2＝{Beam2,Beam1,Beam3}
...... ......
表3
本方案中，映射表还可包括下行波束与上行波束分组之间的映射关系。
同样，当只有上行的分量载波执行载波聚合时，基站根据接收到的SRS配置上行公共波束和下行分量载波各波束之间的映射关系。如表4所示，当UE进行上行波束扫描，基站接收到来自UE的上行SRS时进行测量并得到一个最佳的上行公共波束，并发送探测参考资源指示给UE进行上行波束指示。例如，当通过上SRS测量得到的最佳上行公共波束是UL beam1时并发送指示，此时DL CC0～DL CC4分别利用DL beam group1中的波束分别进行接收。
Figure PCTCN2021070339-appb-000001
表4
本方案中，映射表还可包括上行波束和下行波束分组之间的映射关系。
当下行或者上行分量载波组中的DCI不存在TCI时，或者当下行或者上行分量载波组的调度时间小于预设值时，UE采用当前调度时隙之前最近一次的指示的下行或者上行波束。例如，第n个调度时隙中下行分量载波组中DCI不存在TCI或者调度时间小于预设值时，采用n-1个调度时隙中的下行公共波束。
方案三：不同分量载波配置不同波束指示设计。
此方案中，上下行所有的分量载波采用不同的波束进行波束指示，基站通过RRC配置了一个或多个TCI状态池。每个TCI状态池中可以包括下行参考信号CSI，又包括上行参考信号SRS。当所有的分量载波都配置相同的TCI状态池时，配置在TCI状态池中波束分别用于指示分量载波。假如载波聚合系统上下行分量载波依次标记为CC0～CC5。
当终端用户接收到来自基站的下行波束扫描后会进行信道信息状态信息(CSI)测量后上报给基站，由于TCI资源池中也配置了上行参考信号,终端用户也会执行上行波束扫描，当收到了终端用户的上行参考信号SRS时，基站进行测量，然后发送SRI指示上行传输波束。当基站接收到来自UE上报的CSI信息和SRS信号后，利用RRC配置多个TCI状态池，不同TCI状态池中配置的参考信号可以存在重叠，也可以完全不同。在利用MAC CE激活一个或者多个TCI资源后，还需要利用DCI信令指示一个激活的TCI资源。如表5所示，当DCI指示的TCI状态池索引是TCI1时，则采用Beam group1中的波束用于分量载波CC0～CC5的数据传输。
Figure PCTCN2021070339-appb-000002
表5
当DCI不存在TCI资源或者当下行或者上行分量载波组的调度时间小于预设值时，UE采用当前调度时隙之前最近一次的指示的下行或者上行波束。例如，第n个调度时隙中下行分量载波组中DCI不存在TCI或者调度时间小于预设值时，采用n-1个调度时隙中的下行公共波束。当TCI状态池中配置的参考信号数量小于分量载波数量时，也就是说当TCI状态池中配置的波束数量小于分量载波数量时，UE采用与该分量载波具有最低频率间隔的具有最低分量载波索引 (CC index)的分量载波的波束。
当不同的分量载波都配置不同的TCI状态池时，假如CC0～CC5中具有3个下行分量载波和2个上行分量载波。考虑两种设计机制，第一种是不同的分量载波独立进行波束管理。终端UE在不同的分量载波上分别进行波束扫描并分别选择最佳的波束上报给基站，而终端UE也分别通过不同分量载波给发送上行参考信号SRS到基站，基站测量分别发送SRI指示上行传输波束。根据每个载波中的上报CSI信息或者SRS信号，基站分别讲不同分量载波所对应的波束配置在不同的TCI状态池。第二种机制是不同分量载波之间的联合波束管理，当终端UE接收到来自基站的下行波束扫描后会进行信道信息状态信息(CSI)测量并选择最佳的波束上报给基站，基站通过RRC配置最佳下行公共波束与和上行分量载波配置的TCI状态池的映射关系，如表6所示。同样，UE进行上行波束扫描，基站接收到来自UE的上行参考信号SRS进行测量，并发送SRI指示上行最佳波束，基站通过RRC配置该上行最佳波束与下行分量载波映射关系的映射表。如表7所示。
Figure PCTCN2021070339-appb-000003
表6
Figure PCTCN2021070339-appb-000004
表7
还可以通过联合上下行波束扫描，配置如表8所示的映射关系的映射表。
Figure PCTCN2021070339-appb-000005
表8
当基站端接收到来自UE上报的CSI和上行参考信号SRS时，就能通过表8的映射关系配置给分量载波相应的TCI状态池。当DCI不存在TCI资源或者当下行或者上行分量载波组的调度时间小于预设值时，UE采用当前调度时隙之前最近一次的指示的TCI。例如，第n个调度时隙配置的TCI group1,第n-1次时隙中配置TCI group2,当第n次时隙中某个分量载波中DCI不存在TCI或者调度时间小于预设值时，采用TCI group2。
如图8所示,本申请还提供一种通信设备,包括:处理器110和存储器120.
处理器110控制通信设备的操作,处理器110还可以称为CPU(Central Processing Unit,中央处理单元)。处理器110可能是一种集成电路芯片,具有信号序列的处理能力。处理器110还可以是通用处理器、数字信号序列处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
存储器120存储处理器110工作所需要的指令和数据。
处理器110用于执行指令以实现本申请各实施例及方案一、二、三种基站所执行步骤。
如图9所示,本申请通信设备第二实施例包括:处理器210和存储器220。
处理器210控制通信设备的操作,处理器210还可以称为CPU(Central Processing Unit,中央处理单元)。处理器210可能是一种集成电路芯片,具有信号序列的处理能力。处理器210还可以是通用处理器、数字信号序列处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
存储器220存储处理器210工作所需要的指令和数据。
处理器210用于执行指令以实现本申请各实施例及方案一、二、三种用户设备侧所执行的方法。
如图10所示,本申请可读存储介质一实施例包括存储器310,存储器310存储有指令,该指令被执行时实现本申请任一实施例及可能的组合所提供的方法。
存储器310可以包括只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、闪存(Flash Memory)、硬盘、光盘等。
在本申请所提供的几个实施例中,应该理解到,所揭露的方法和装置,可以通过其它的方式实现。例如,以上所描述的装置实施方式仅仅是示意性的,例如,所述模块或单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施方式方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理包括,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机装置(可以是个人计算机,服务器,或者网络装置等)或处理器(processor)执行本申请各个实施方式所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述仅为本申请的实施方式,并非因此限制本申请的专利范围,凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本申请的专利保护范围内。

Claims (18)

  1. 一种用于载波聚合的上下行波束指示方法,其特征在于，所述方法执行于基站侧，包括:
    给用户设备配置TCI状态池及映射表，所述映射表至少包括波束索引和分量载波之间的映射关系；
    向所述用户设备发送第一指示，所述第一指示用于指示所述用户设备调用所述TCI状态池及所述映射表，为所述分量载波配置相应波束。
  2. 根据权利要求1所述的上下行波束指示方法，其特征在于，所述映射表包括所述波束索引、所述分量载波组索引以及所述分量载波之间的映射关系。
  3. 根据权利要求1所述的上下行波束指示方法，其特征在于，所述映射表还包括所述波束索引与波束分组之间的映射关系，所述波束索引为上行波束或下行波束，所述波束分组为上行波束分组或下行波束分组。
  4. 根据权利要求1所述的上下行波束指示方法，其特征在于，所述映射表还包括TCI状态池索引以及波束分组之间的映射关系。
  5. 根据权利要求1所述的上下行波束指示方法，其特征在于，所述映射表还包括下行候选波束索引与上行TCI分组之间的映射关系和/或上行候选波束索引与下行TCI分组之间的映射关系。
  6. 根据权利要求1所述的上下行波束指示方法，其特征在于，所述给用户设备配置TCI状态池及映射表的步骤之前，还包括：
    接收所述用户设备所上报的第一信息，所述第一信息用于表征所有所述分量载波不能共用同一波束进行传输。
  7. 根据权利要求1所述的上下行波束指示方法，其特征在于，所述映射表由系统信息SI承载。
  8. 根据权利要求1所述的上下行波束指示方法，其特征在于，所述分量载波的数量由无线资源控制RRC信令所配置。
  9. 根据权利要求1所述的上下行波束指示方法，其特征在于，所述给用户设备配置TCI状态池及映射表的步骤之前，还包括：
    接收所述用户设备所上传的测量信息，所述测量信息包括信道状态信息CSI和/或探测参考信号SRS；
    根据所述测量信息生成所述TCI状态池及所述映射表。
  10. 根据权利要求1所述的上下行波束指示方法，其特征在于，若所述TCI状态池的数量为1时，所述第一指示仅包含TCI状态池激活指令。
  11. 根据权利要求1所述的上下行波束指示方法，其特征在于，若所述TCI状态池的数量为多个时，所述第一指示包含TCI状态池激活指令和下行链路控制信息DCI。
  12. 一种上下行波束指示方法，其特征在于，所述方法执行于用户设备侧，包括：
    接收基站所配置的TCI状态池、第一指示以及映射表；
    根据所述第一指示调用所述TCI状态池及所述映射表，根据调用结果为分量载波配置相应的波束，所述映射表至少包括波束索引与分量载波之间的映射关系。
  13. 根据权利要求12所述的上下行波束指示方法，其特征在于，若存在至少一个所述分量载波未被所述第一指示所配置，则配置与该分量载波频率间隔相近的分量载波所配置的指示波束。
  14. 一种上下行波束指示方法，其特征在于，所述方法执行于基站侧，包括：
    接收用户设备所上报的第二信息，所述第二信息用于表征所有分量载波能够使用同一波束；
    根据所述用户设备所上传的SRS信号或CSI信息，选择最优波束并发送波束指示至所述用户设备。
  15. 一种上下行波束指示方法，其特征在于，所述方法执行于用户设备侧，包括：
    接收基站所发送的波束指示，为所有分量载波配置所述波束指示所对应的波束进行传输。
  16. 一种通信设备,其特征在于,包括:处理器和通信电路,所述处理器连接所述通信电路；
    所述处理器用于执行指令以实现如权利要求1-10以及14任一项所述的方法。
  17. 一种通信设备,其特征在于,包括:处理器和通信电路,所述处理器连接所述通信电路；
    所述处理器用于执行指令以实现如权利要求11-13以及15任一项所述的方法。
  18. 一种可读存储介质,存储有指令,其特征在于,所述指令被执行时实现如权利要求1-15任一项所述的方法。
PCT/CN2021/070339 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 Ceased WO2022147659A1 (zh)

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