WO2019056369A1 - 通信方法和装置 - Google Patents

通信方法和装置 Download PDF

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Publication number
WO2019056369A1
WO2019056369A1 PCT/CN2017/103177 CN2017103177W WO2019056369A1 WO 2019056369 A1 WO2019056369 A1 WO 2019056369A1 CN 2017103177 W CN2017103177 W CN 2017103177W WO 2019056369 A1 WO2019056369 A1 WO 2019056369A1
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WO
WIPO (PCT)
Prior art keywords
frequency band
transport block
data packet
downlink control
harq process
Prior art date
Application number
PCT/CN2017/103177
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English (en)
French (fr)
Inventor
苏立焱
官磊
马莎
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP17925806.6A priority Critical patent/EP3678429B1/en
Priority to PCT/CN2017/103177 priority patent/WO2019056369A1/zh
Priority to CN201780095154.5A priority patent/CN111133817B/zh
Publication of WO2019056369A1 publication Critical patent/WO2019056369A1/zh
Priority to US16/828,169 priority patent/US11394519B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/04—Arrangements for detecting or preventing errors in the information received by diversity reception using frequency diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H04L1/1845—Combining techniques, e.g. code combining
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present application relates to the field of communications, and in particular to a communication method and apparatus in the field of communications.
  • the transmitting end introduces a hybrid automatic repeat request (HARQ), which is a combination of error correction coding and automatic repeat request (ARQ).
  • HARQ hybrid automatic repeat request
  • the transmitting end adds redundant information through error correction coding, so that the receiving end can correct a part of the error when decoding, thereby reducing the number of retransmissions (not requiring retransmission in case of any error);
  • the receiving end requests the transmitting end to resend the data through the ARQ mechanism.
  • the basic unit of HARQ retransmission is a transport block (TB), and one TB corresponds to a data block including a Media Access Control (MAC) layer packet data unit (PDU).
  • MAC Media Access Control
  • the network device sends a TB through a physical downlink shared channel (PDSCH), and sends downlink control information through a physical downlink control channel (PDCCH), where the downlink control information indicates a TB corresponding
  • PDSCH physical downlink shared channel
  • PDCCH physical downlink control channel
  • the scheduling information may include a time-frequency resource used by the data packet, a modulation and coding scheme (MCS) index, and the like.
  • MCS modulation and coding scheme
  • the terminal device uses an error detection code to detect whether the received data packet is in error.
  • the terminal device sends an acknowledgement (ACK) feedback to the network device; if an error occurs, the terminal device saves the received error packet in a HARQ buffer and sends a negative acknowledgement (negative acknowledgement, NACK) is fed back to the network device. After receiving the NACK, the network device resends a data packet carrying the same TB.
  • ACK acknowledgement
  • NACK negative acknowledgement
  • a network device may use multiple HARQ processes in parallel, and in the downlink control information, TB corresponds to a HARQ process ID to distinguish TBs to which multiple processes belong. Specifically, after the network device transmits the data packet carrying the TB corresponding to one HARQ process ID, the network device stops the transmission of the acknowledgement feedback ACK/negative feedback NACK waiting for the receiver. While waiting for feedback from one HARQ process, the network device can use another HARQ process to transmit different TBs to achieve an equivalent continuous transmission. These HARQ processes together form a HARQ entity.
  • a network device can use multiple CCs to send downlink data to a terminal device.
  • the HARQ entities on each CC are independent of each other, meaning that the data packets sent by the network device on each CC correspond to separate HARQ processes on each CC, and the terminal devices cannot recognize different ones before decoding.
  • the relationship between multiple data packets received on the CC that carry multiple transport blocks.
  • the embodiment of the invention provides a communication method and device for improving data transmission reliability in a multi-band transmission scenario.
  • an embodiment of the present invention provides a communication method.
  • the terminal device receives the first downlink control information from the network device, where the first downlink control information includes a first hybrid automatic repeat request (HARQ) process number.
  • the terminal device receives the first data packet carrying the first transport block in the first frequency band, and receives the second data packet that carries the second transport block in the second frequency band, where the first HARQ process number corresponds to the first frequency band.
  • the terminal device jointly decodes the first data packet and the second data packet.
  • the terminal device can acquire the transport block (ie, the first transport block and the second transport block above) by jointly coding the first data packet and the second data packet.
  • an embodiment of the present invention provides a communication method.
  • the network device sends the first downlink control information to the terminal device, where the first downlink control information includes a first hybrid automatic repeat request (HARQ) process number.
  • HARQ hybrid automatic repeat request
  • the process number corresponds to the first transport block on the first frequency band and the second transport block on the second frequency band, and the first transport block and the second transport block are the same.
  • the network device identifies multiple transport blocks on different frequency bands by using the same HARQ process ID. Since the multiple transport blocks are the same, the terminal device may identify bearers on multiple frequency bands according to the HARQ process ID. Data packets of the same transport block, and jointly decoding multiple data packets carrying multiple transport blocks corresponding to the same process number, since multiple data packets carrying the same transport block contain more redundant information, Multiple data packet combination decoding can utilize more redundant information to suppress the energy of interference noise, thereby reducing the error rate of downlink data transmission and improving the reliability of downlink data transmission.
  • the terminal device before the terminal device receives the acknowledgement feedback information corresponding to the first transport block and the second transport block sent by the network device, the terminal device is in the first And receiving, by the network device, a third data packet that carries the third transport block, and correspondingly, the network device sends, on the first frequency band, a third data packet that carries the third transport block, where the third transport block corresponds to the third data packet.
  • the first HARQ process number is different, and the third transport block is different from the first transport block.
  • the terminal device before receiving the acknowledgement feedback information corresponding to the first transport block and the second transport block sent by the network device,
  • the first HARQ process ID is available on the first frequency band, that is, in a case that the HARQ process corresponding to the first transport block and the second transport block has not ended, the network device can be in the The first frequency band uses a first HARQ process ID to identify a different HARQ process.
  • the network device may send a third data packet carrying a third transport block on the first frequency band, where the third transport block corresponds to the first A HARQ process number, the third transport block being different from the first transport block.
  • the network device can use the first HARQ process on the first frequency band.
  • the number identifies a different HARQ process that belongs to the first-band HARQ entity, and indicates that the first HARQ process number corresponding to the first transport block and the second transport block does not occupy the HARQ process of the same HARQ process number on the first frequency band, for example,
  • the method in this embodiment may further send the bearer and the first HARQ process ID on the first frequency band.
  • the first transport block has different transport blocks of data packets.
  • the method provided in this embodiment can avoid occupying all the same HARQ process IDs in all transmission frequency bands when performing multi-band joint transmission, and reduce the impact on data transmission on the frequency band, that is, the same time can not be reduced in part of the transmission frequency band.
  • the number of HARQ process numbers used ensures the total throughput of the system.
  • the first frequency band and the second frequency band belong to a first frequency band set, and the first frequency band set includes at least two frequency bands.
  • the network device receives, by the terminal device, the first downlink control information on the second frequency band, and correspondingly, the network device sends first downlink control information on the second frequency band, where the terminal device Before the first data packet and the second data packet are jointly decoded, the terminal device determines, according to the second frequency band where the first downlink control information is located, the first transmission on the first frequency band.
  • the HARQ process number corresponding to the block is the first HARQ process ID, that is, the HARQ process number corresponding to the first transport block on the first frequency band included in the first frequency band set to which the second frequency band belongs is determined to be
  • the first HARQ process number is described.
  • the network device sends the first downlink control information on the second frequency band, and the terminal device determines, according to the frequency band in which the first downlink control information is located, the first transport block on the first frequency band that belongs to the same frequency band set.
  • the corresponding HARQ process ID is the first HARQ process ID, and does not require additional signaling indications of the network device, which saves signaling overhead.
  • the first frequency band and the second frequency band belong to a first frequency band set, and the first frequency band set includes at least two frequency bands.
  • the terminal device determines, according to the second frequency band, that the HARQ process number corresponding to the transport block on the second frequency band can be the at least two Used in bands other than the second band. Further, the terminal device may determine that the HARQ process ID corresponding to the first transport block of the first frequency band is the first HARQ process ID.
  • the first frequency band set may be predefined.
  • the first frequency band set may be configured by high layer signaling.
  • the first downlink control information further includes scheduling information of the first data packet and the second data packet.
  • the first downlink control information simultaneously schedules the first data packet on the first frequency band and the second data packet on the second frequency band, and indicates that the first transport block and the second transport block correspond to each other.
  • the same HARQ process number The terminal device identifies the data packet corresponding to the same transport block in different frequency bands by using the scheduling information included in the first downlink control information, reduces the complexity of scheduling the multi-band joint transmission, and reduces the overhead of the downlink control signaling.
  • the terminal device determines, according to the frequency band that receives the first downlink control information, that the first HARQ process number corresponding to the first transport block and the second transport block can be in other frequency bands except the frequency band at the same time. Identify different HARQ processes on it.
  • the network device sends the first downlink control information on the second frequency band, and the terminal device determines according to the frequency band in which the first downlink control information is located, without requiring additional signaling indications of the network device, thereby saving Signaling overhead.
  • the terminal device before the terminal device receives the second data packet sent by the network device on the second frequency band, the terminal device receives the second downlink control information from the network device, and correspondingly, the network The device sends the second downlink control information to the terminal device, where the second downlink control information includes the first HARQ process ID and scheduling information of the first data packet, and first indication information.
  • the first downlink control information further includes scheduling information of the first data packet, where the first indication information indicates that the first HARQ process ID is a HARQ process ID used by the second frequency band.
  • the first frequency band and the second frequency band belong to a first frequency band set, and the first frequency band set includes at least two frequency bands.
  • the terminal device receives the indication information of the first frequency band set and/or the indication information of the second frequency band by using the first signaling, correspondingly, And the network device sends the indication information of the first frequency band set and the indication information of the second frequency band by using the first signaling.
  • the frequency band other than the second frequency band of the at least two frequency bands can use the HARQ process number corresponding to the transport block on the second frequency band.
  • the first signaling may be high layer signaling.
  • an embodiment of the present invention provides a wireless device, where the wireless device is configured to perform a function of a terminal device in the foregoing method.
  • These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the structure of the terminal device includes a transceiver, a processor, and a memory coupled to the processor.
  • the transceiver is configured to support communication between the terminal device and the network device, and send information or signaling involved in the foregoing method to the network device, and receive information or signaling sent by the network device.
  • the processor and the memory coupled to the processor are used to implement the functionality of the terminal device in the actual method described above.
  • an embodiment of the present invention provides a network device, where the network device is configured to perform a function of a network device in the foregoing method.
  • These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the structure of the network device includes a transceiver, a processor, and a memory coupled to the processor.
  • the transceiver is configured to support communication between the terminal device and the network device, and send information or signaling involved in the foregoing method to the terminal device, and receive information or signaling sent by the terminal device.
  • the processor and the memory coupled to the processor are used to implement the functionality of the network device in the actual method described above.
  • a communication device for performing the function of a terminal device or a network device in practice in the above method.
  • These functions can be implemented in hardware or in software by executing the corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • a computer storage medium comprising instructions which, when run on a computer, cause the computer to perform the functions of the terminal device or network device in practice.
  • FIG. 1 is a schematic diagram of a radio frame structure in an LTE system
  • FIG. 2 is a simplified schematic diagram of a HARQ protocol
  • FIG. 3 is a schematic diagram of a wireless communication system according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a network device in the above wireless communication system
  • FIG. 5 is a schematic diagram of a possible structure of a terminal device in the above wireless communication system
  • FIG. 6 is a schematic diagram of interaction of a method according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of interaction of a method according to an embodiment of the present invention.
  • One in the embodiments of the present invention means a single individual, and does not mean that it can only be one individual, and cannot be applied to other individuals.
  • a terminal device in the embodiment of the present invention refers to a certain terminal device, and does not mean that it can be applied to only one specific terminal device.
  • system can be used interchangeably with "network”.
  • references to "one embodiment” (or “an implementation") or “an embodiment” (or “an implementation”) in this application are meant to include the particular features, structures, features, etc. described in connection with the embodiments, in at least one embodiment. . Thus, “in one embodiment” or “in an embodiment” or “an”
  • the terms "and/or” and “at least one” in the case of “A and/or B” and “at least one of A and B” in the embodiment of the present invention include any one of three schemes, That is, a scheme including A but not including B, a scheme including B not including A, and a scheme including both options A and B.
  • such a phrase includes any of the six schemes, ie, includes A, but does not include the B and C schemes, including B without A and C, including C but not A and B, including A and B but not C, including B and C but not A
  • the scheme includes the schemes of A and C but not B, and the schemes of all three options A, B and C.
  • CA carrier aggregation
  • LTE Long Term Evolution
  • 5G Fifth Generation
  • the communication system described in the embodiments of the present invention is for the purpose of more clearly explaining the technical solutions of the embodiments of the present invention, and does not constitute a limitation of the technical solutions provided by the embodiments of the present invention. Those skilled in the art may know that with the evolution of the communication system The technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.
  • the fifth generation (Fifth Generation, 5G) mobile communication system technology and standards have been researched and developed, and 5G has introduced the important technical requirements of Ultra Reliable and Low Latency Communication (URLLC).
  • the new type of service, URLLC requires transmission to be completed within 1 ms (low latency) and a success rate of 99.999% (ie, error rate 10E-5, high reliability).
  • the 5G includes a branch compatible with LTE continuous evolution from the perspective of compatibility, that is, to implement the URLLC service in the evolved version of the LTE system by utilizing the existing LTE system architecture. In the existing LTE system, the error rate of downlink data transmission cannot meet the high reliability requirement of the URLLC service, so it is necessary to further reduce this error probability.
  • the reliability of the code is increased/the transmission error rate is lowered.
  • the maximum bandwidth of each component carrier (CC) is 20 MHz.
  • the network device transmits downlink data to a terminal device even if the entire bandwidth of the CC is used, and the data packet includes The redundant information is not enough, resulting in the error rate of the packet decoding is not low enough to meet the reliability of the URLLC service requirements.
  • the embodiment of the present invention considers introducing a carrier aggregation (CA) technology in a URLLC scenario, in which a network device allocates multiple CCs to one terminal device, and sends downlink numbers to the terminal device through multiple CCs.
  • CA carrier aggregation
  • a possible structure of time-frequency resources on a CC is given.
  • the HARQ entities on each CC are independent of each other, meaning that the terminal device cannot distinguish between multiple transport blocks received on different CCs before decoding.
  • FIG. 2 shows a simplified diagram of the downstream HARQ process.
  • the network device sends the data packet #1 carrying the TB#1 to the terminal device, and includes the HARQ process ID and the new data indicator (NDI) in the downlink control information of the scheduling data packet #1, and the downlink control information and the data packet # 1 is sent together, for example, the HARQ process number corresponding to TB#1 is 1, and NDI is 0.
  • the terminal device decodes the data packet #1, and if the decoding succeeds, sends an acknowledgement (ACK) feedback to the network device, and if the decoding fails, sends a negative acknowledgement to the network device (negative acknowledgement, NACK) feedback.
  • ACK acknowledgement
  • NACK negative acknowledgement
  • the decoding process fails, and the terminal device feeds back the NACK requesting the network device to retransmit TB#1.
  • the network device After receiving the NACK of the terminal device, the network device retransmits a data packet #2 carrying the TB#1, and uses the same HARQ process ID and NDI as the initial transmission to indicate that the retransmission is, that is, the data packet #2 and the data packet # 1
  • the TB carried is the same.
  • the terminal device correctly decodes the data packet #2, and sends an ACK feedback to the network device.
  • the network device ends the HARQ process corresponding to the TB#1.
  • the network device transmits the TB#2 using the same HARQ process ID. For example, in FIG.
  • the network device sends the data packet #3 carrying the TB#2, the HARQ process number corresponding to the TB#2 is 1, the NDI is 1, and the data packet #2
  • the downlink control information corresponding to the packet #3 has the same HARQ process number and different NDI, and is called NDI inversion.
  • the terminal device After receiving the data packet #3 including the NDI inversion information, the terminal device confirms that the HARQ process corresponding to TB#1 ends, that is, the terminal device determines that the TBs carried by the data packet #3 and the data packet #2 are different. It should be understood that, as described above, the terminal device receiving the NDI flip information is referred to as the acknowledgement feedback that the terminal device receives the corresponding TB (TB#1).
  • the terminal device After the terminal device receives the acknowledgement feedback of the TB#1, it is confirmed that the TB#1 corresponds to The HARQ process ends, and the HARQ process number 1 is used to identify the HARQ process corresponding to the next different TB, such as TB#2.
  • a TB is bound to a HARQ process ID in each HARQ entity.
  • the HARQ process ID is only after the TB completes the transmission or exceeds the maximum number of retransmissions, that is, after the HARQ process ends. Can be used by other TBs.
  • the HARQ entities on each component carrier (CC) are independent of each other, that is, there is no relationship between HARQ process numbers used on different CCs, and HARQ process numbers used on different CCs. Only for this CC.
  • the embodiment of the present invention provides a solution capable of improving the reliability of data transmission.
  • FIG. 3 shows an application scenario of the embodiment of the present invention, which includes a network device 201, and terminal devices 211-213 that are within the coverage of the network device 201 and communicate with the network device 201.
  • the terminal device may also be referred to as a user equipment (User Equipment, UE), a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), etc., and the terminal device may be connected by using a wireless device.
  • the Radio Access Network (RAN) communicates with one or more core networks.
  • the terminal device is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or on-board; It can be deployed on the water (such as ships); it can also be deployed in the air (such as airplanes, balloons, satellites, etc.).
  • the terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and industrial control ( Wireless terminal in industrial control), unmanned (self Wireless terminal in driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city , wireless terminals in smart homes, etc.
  • the network device (for example, the network device 201) is a device deployed in the radio access network to provide a wireless communication function for the terminal device.
  • the network device may include various forms of macro base stations, micro base stations (also referred to as small stations), relay stations, access points, and the like.
  • the network device may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB, NB) in WCDMA, or may be an evolved Node B (eNB or e in LTE or eLTE).
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB evolved Node B
  • -NodeB which may also be a next-generation mobile network, such as a base station gNB ((next) generation NodeB) in 5G (fifth generation).
  • CA carrier aggregation CA in LTE
  • CA is to aggregate two or more CCs together to support a larger transmission bandwidth.
  • the maximum supported 100MHz transmission bandwidth that is, the CA supports a maximum of 5 CCs
  • the CC participating in the CA is further increased.
  • the maximum bandwidth of each CC is 20 MHz
  • the maximum available resource is 110 resource blocks (RBs).
  • the CA supports aggregation between different CCs, which may be CCs of the same or different bandwidth (for example, 1.4, 3, 5, 10, 15, 20 MHz), and may be CCs in the same frequency band or in different frequency bands.
  • the network device configures multiple CCs to the terminal device, and sends downlink data through these CCs.
  • the communication scenario shown in FIG. 3 is an example of a communication scenario that can be applied to the embodiment of the present invention, and does not limit the application scenario of the embodiment of the present invention.
  • the terminal device can support one or more wireless technologies for wireless communication, such as 5G, LTE, WCDMA, CDMA, 1X, Time Division-Synchronous Code Division Multiple Access (TS-SCDMA), GSM, 802.11 and more.
  • the terminal device supports carrier aggregation technology.
  • Multiple terminal devices can perform the same or different services. For example, mobile broadband services, Enhanced Mobile Broadband (eMBB) services, Ultra-Reliable and Low-Latency Communication (URLLC) services, and the like.
  • eMBB Enhanced Mobile Broadband
  • URLLC Ultra-Reliable and Low-Latency Communication
  • the network device 201 is capable of performing the method provided by the embodiments of the present invention.
  • the network device 201 may include a controller or a processor 401 (hereinafter, the processor 401 is taken as an example) and a transceiver 402. Controller/processor 401 is sometimes also referred to as a modem processor.
  • Modem processor 401 can include a baseband processor (BBP) (not shown) that processes the digitized received signal to extract information or data bits conveyed in the signal.
  • BBP baseband processor
  • DSPs digital signal processors
  • ICs integrated circuits
  • the transceiver 402 can be used to support the transmission and reception of information between the network device 201 and the terminal device, and to support radio communication between the terminal devices.
  • the processor 401 can also be used to perform functions of communication between various terminal devices and other network devices.
  • On the uplink the uplink signal from the terminal device is received via the antenna, coordinated by the transceiver 402, and further processed by the processor 401 to recover the traffic data and/or signaling information transmitted by the terminal device.
  • traffic data and/or signaling messages are processed by the terminal device and modulated by the transceiver 402 to generate downlink signals for transmission to the terminal device via the antenna.
  • the network device device 201 can also include a memory 403 that can be used to store program code and/or data for the network device 201.
  • the transceiver 402 can include separate receiver and transmitter circuits, or the same circuit can implement transceiving functions.
  • the network device 201 can also include a communication unit 404 for supporting the network device 201 to communicate with other network entities. For example, it is used to support the network device 201 to communicate with a network device or the like of the core network.
  • the network device may also include a bus.
  • the transceiver 402, the memory 403, and the communication unit 404 can be connected to the processor 401 through a bus.
  • the bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus may include an address bus, a data bus, a control bus, and the like.
  • FIG. 5 is a schematic diagram of a possible structure of a terminal device in the above wireless communication system.
  • the terminal device is capable of performing the method provided by the embodiment of the present invention.
  • the terminal device may be any one of three terminal devices 211-213.
  • the terminal device includes a transceiver 501, an application processor 302, a memory 503, and a modem processor 504.
  • the transceiver 501 can condition (e.g., analog convert, filter, amplify, upconvert, etc.) the output samples and generate an uplink signal that is transmitted via an antenna to the base station described in the above embodiments. On the downlink, the antenna receives the downlink signal transmitted by the network device. Transceiver 501 can condition (eg, filter, amplify, downconvert, digitize, etc.) the signals received from the antenna and provide input samples.
  • Modem processor 504 also sometimes referred to as a controller or processor, may include a baseband processor (BBP) (not shown) that processes the digitized received signal to extract information conveyed in the signal Or data bits.
  • BBP baseband processor
  • the BBP is typically implemented in one or more numbers within the modem processor 504 or as separate integrated circuits (ICs) as needed or desired.
  • a modem processor 504 may include an encoder 5041, a modulator 5042, a decoder 5043, and a demodulator 5044.
  • Encoder 5041 is for encoding the signal to be transmitted.
  • encoder 5041 can be used to receive traffic data and/or signaling messages to be transmitted on the uplink and to process (eg, format, encode, or interleave, etc.) the traffic data and signaling messages.
  • Modulator 5042 is used to modulate the output signal of encoder 5041.
  • the modulator can perform symbol mapping and/or modulation processing on the encoder's output signals (data and/or signaling) and provide output samples.
  • a demodulator 5044 is used to demodulate the input signal.
  • demodulator 5044 processes the input samples and provides symbol estimates.
  • a decoder 5043 is configured to decode the demodulated input signal.
  • the decoder 5043 de-interleaves, and/or decodes the demodulated input signal and outputs the decoded signal (data and/or signaling).
  • Encoder 5041, modulator 5042, demodulator 5044, and decoder 5043 may be implemented by a composite modem processor 504. These units are processed according to the radio access technology employed by the radio access network.
  • Modem processor 504 receives digitized data representative of voice, data or control information from application processor 502 and processes the digitized data for transmission.
  • the associated modem processor can support one or more of a variety of wireless communication protocols of various communication systems, such as LTE, new air interface, Universal Mobile Telecommunications System (UMTS), high speed packet access (High Speed) Packet Access, HSPA) and more.
  • UMTS Universal Mobile Telecommunications System
  • High Speed Packet Access High Speed Packet Access
  • one or more memories may also be included in the modem processor 304.
  • modem processor 504 and the application processor 502 may be integrated in one processor chip.
  • the memory 503 is used to store program codes (sometimes referred to as programs, instructions, software, etc.) and/or data for supporting communication of the terminal device.
  • program codes sometimes referred to as programs, instructions, software, etc.
  • the memory 503 or the memory 503 may include one or more storage units, for example, may be a processor 401 or a modem processor 504 for storing program code or a storage unit inside the application processor 502, or may Is an external storage unit separate from the processor 401 or the modem processor 504 or the application processor 502, or may also be a storage unit including the processor 401 or the modem processor 504 or the application processor 502 and with the processor 401 or a modem Processor 504 or application processor 502 is a component of an independent external storage unit.
  • the processor 401 and the modem processor 501 may be the same type of processor or different types of processors. For example, it can be implemented in a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), and a field programmable gate array ( Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic device, hardware component, other integrated circuit, or any combination thereof.
  • Processor 401 and modem processor 501 may implement or perform various exemplary logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing function devices, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, or a system-on-a-chip (SOC) or the like.
  • the embodiment of the invention provides a communication method to improve data transmission reliability in a multi-band transmission scenario. Further, the method provided by the embodiment of the present invention can avoid occupying HARQ process numbers in multiple frequency bands and reduce the impact of multi-band transmission on single-band data transmission.
  • the frequency band described in the embodiment of the present invention represents a continuous frequency domain resource and can be used for data transmission alone.
  • the frequency band in the embodiment of the present invention may be a component carrier in a carrier aggregation (CA) technology, or may be a bandwidth part (BWP) in a 5G New Radio (NR) system, and each BWP The bandwidth is less than or equal to the maximum bandwidth supported by the terminal device, and may be other frequency bands having the same concept in the future communication system.
  • CA carrier aggregation
  • BWP bandwidth part
  • NR 5G New Radio
  • the data packet carrying the same transport block refers to the same pre-encoding bit information carried in the data packet, where the pre-encoding bit may be a data service transmitted between the network device and the terminal device, for example, file downloading, Video transmission, etc., may also be a voice communication service.
  • the data contained in the transport block may be a data block of a Media Access Control (MAC) layer packet data unit (PDU).
  • MAC Media Access Control
  • PDU Media Access Control
  • the data packets carrying the same transport block in the embodiment of the present invention may be the same or different.
  • the following uses the Turbo coding used in the LTE system as an example to explain how the same transport block is encoded and becomes a different data packet:
  • the transmitter in this case, the network device also needs to provide the encoder with the encoding rate of the data packet (ie, the transport block contains The encoder can correctly encode the number of bits and the number of bits contained in the encoded data packet and the redundancy version number.
  • a transport block containing N bits is first encoded in the Turbo encoder as a mother code with a coding rate of 1/3, ie the mother code length is 3N bits; then the encoder will according to the required coding rate and redundancy version number, The bits in the mother code are picked up in turn and form a data packet.
  • the rules for the bits in the mother code picked up here are determined by the redundancy version number, and the number of selected bits is determined by the coding rate.
  • the coding rate is less than 1/3, some bits in the mother code will not appear in the data packet; when the coding rate is greater than or equal to 1/3, all the bits in the mother code will appear in the data packet, and may Some bits are repeated in the packet.
  • the data packets are also the same; if the redundancy version number or the encoding rate or the modulation method has at least one different, the data packet is also different.
  • FIG. 6 is a schematic diagram of interaction of a communication method according to an embodiment of the present invention.
  • the network device network device sends a data packet carrying the same transport block to the terminal device on at least two frequency bands belonging to the first frequency band set, and the terminal device jointly decodes the data packet carrying the same transport block.
  • the network device sends the first downlink control information, where the terminal device receives the first downlink control information.
  • the first downlink control information may include a first HARQ process ID.
  • the first HARQ process number corresponds to the first transport block and the second transport block, indicating that the first transport block and the second transport block belong to the same HARQ process, that is, the first transport block and the second transport block are the same.
  • the first downlink control information may further include scheduling information that carries the first data packet of the first transport block.
  • the scheduling information herein may include, for example, information for transmitting a time-frequency resource of the first data packet, a Modulation and Coding Scheme (MCS) index, and the like in the first frequency band.
  • MCS Modulation and Coding Scheme
  • the first downlink control information may further include scheduling information of the second data packet carrying the second transport block on the second frequency band.
  • the scheduling information may include information, a MCS index, and the like for transmitting a time-frequency resource of the second data packet in the second frequency band.
  • the first downlink control information simultaneously schedules data packets transmitted on the two frequency bands that carry the same transport block. That is, two data packets are scheduled by one downlink control information, and the two data packets are respectively transmitted on different frequency bands, and the transport blocks that are carried are the same.
  • the network device schedules data packets on two frequency bands by using one downlink control information, and two data packets carry the same transport block, and two data packets are the same in one downlink control information.
  • the information fields can be multiplexed, such as the first HARQ process number, so that signaling overhead can be saved.
  • the terminal device determines that the HARQ process number corresponding to the first transport block in the first frequency band is the first one by using the frequency band location where the downlink control information is located.
  • the HARQ process number also saves the signaling overhead of notifying the process number corresponding to the first transport block.
  • the embodiment of the present invention may further include the step S601', the network device sends the second downlink control information, and the terminal device receives the second downlink control information.
  • the second downlink control information may include scheduling information of the first data packet, a first HARQ process ID, and first indication information, where the first HARQ process ID belongs to the HARQ entity on the second frequency band.
  • the network device before the network device sends the first downlink control information and the second downlink control information, the network device And transmitting the indication information of the first frequency band set and the indication information of the second frequency band by using the first signaling, where the first frequency band and the second frequency band belong to the first frequency band set, and the first frequency band set includes at least two frequency bands, and at least two frequency bands
  • the frequency band other than the second frequency band can use the HARQ process number corresponding to the transport block on the second frequency band.
  • the first signaling may be high layer signaling, and the first signaling may be one signaling or multiple signaling, that is, the indication information of the first frequency band set and the indication information of the second frequency band may be sent in one signaling, and It can be sent in different signaling.
  • the high layer signaling may be one or more of the following messages: a master information block (MIB) message, system information, and a radio resource control (RRC) message.
  • the system information may be a system information broadcast (SIB) message or a system information block message for configuring a random access channel (RACH) resource.
  • the RRC message may be a public RRC message, that is, an RRC message sent to a terminal device in a cell, or may be a terminal device-specific RRC message, that is, an RRC message sent to a specific terminal device.
  • the indication information of the first frequency band set and the indication information of the second frequency band may be predefined for the communication network.
  • steps S601 and S601' in this embodiment do not limit the order. Step S601 may be performed first, followed by S601', or S601' may be performed first, then step S601 may be performed, or steps S601' and S601 may be simultaneously performed.
  • the embodiment of the present invention is described by taking two data packets as an example.
  • the embodiment of the present invention is not limited to two data packets and two frequency bands.
  • the scheme according to the embodiment of the present invention may of course be not limited to two data packets and two frequency bands.
  • the network device sends a first data packet carrying the first transport block on the first frequency band, and the terminal device receives the first data packet on the first frequency band.
  • the network device sends a second data packet carrying the second transport block on the second frequency band, and the terminal device receives the second data packet on the second frequency band.
  • steps S602 and S603 do not limit the sequence. Step S603 may be performed first, and then S602 may be performed. Alternatively, S602 may be performed first, then step S603 may be performed, or steps S602 and S603 may be simultaneously performed.
  • the first data packet and the second data packet correspond to the same process ID, that is, the first HARQ process ID, indicating that the first data packet and the second data packet belong to the same HARQ process, and the first data packet carries The first transport block is the same as the second transport block carried by the second data packet.
  • the data packets in the same HARQ process carry the same transport block, and the terminal device jointly decodes the data packets in the same HARQ process, and the data packets carrying the same transport block contain more redundant information, and the decoding is added. Reliability, which in turn improves the reliability of downlink transmission.
  • the transport block carried by the first data packet and the second data packet is the same.
  • the first data packet and the second data packet may be the same or different.
  • the data rate may be different
  • the coding rate and the modulation mode may be different data packets, or
  • the same data packet is formed due to the same coding and modulation scheme.
  • the initial and retransmitted data packets are generally different data packets, but carry the same transport block.
  • these packets are encoded at the same rate and modulation, except that the redundancy version is different.
  • joint decoding with different redundancy versions is beneficial to increase the reliability of the system.
  • the different redundancy versions actually select the different bits of the mother code in the encoding.
  • the encoding rate is less than 1/3
  • some of the mother codes The bits do not appear in the packet. Since different redundancy versions select different bits in the mother code, it is possible to completely recover the mother code through different redundancy versions than to transmit only a single redundancy version, thereby achieving higher reliability.
  • the action sent in the above steps may be implemented by the transceiver 402 of the network device 201.
  • the processor 401 of the network device 201 may be used to control the implementation of the transceiver 402.
  • the action received in the above steps may be implemented by the transceiver 501 of the above terminal device.
  • the modem processor 504 of the terminal device may also be used to control the implementation of the transceiver 501.
  • the embodiment may further include: determining, by the terminal device, the second frequency band.
  • this embodiment provides multiple manners for determining the second frequency band, that is, determining that the first HARQ process ID belongs to the HARQ entity on the second frequency band.
  • the terminal device determines the second frequency band according to the second downlink control information, that is, determines that the first HARQ process ID belongs to the HARQ entity on the second frequency band.
  • the second downlink control information includes a first HARQ process ID and first indication information, where the first indication information indicates that the first HARQ process ID is a HARQ process ID used by the second frequency band.
  • a 1-bit information field is added to the second downlink control information. If the information field is in the first state, for example, 0, it indicates that the first HARQ process number corresponding to the first transport block belongs to the HARQ entity in the frequency band carrying the first data packet, that is, the HARQ entity in the first frequency band, and the specific transmission mode is The existing system is the same; if the information field is in the second state, for example, 1, the first HARQ process number corresponding to the first transport block is the HARQ process number in the second frequency band, and belongs to the HARQ entity on the second frequency band, and the network device The first HARQ process number may be used to transmit other data packets carrying different transport blocks on the first frequency band.
  • the information field is in the second state, indicating that the first indication information is included in the first downlink control information.
  • the first state and the second state may be predefined.
  • the terminal device before the terminal device receives the first downlink control information, the terminal device further receives the indication information of the second frequency band by using the first signaling, where the terminal device is configured according to the first indication information and/or the second The indication information of the frequency band determines the second frequency band.
  • the indication information of the second frequency band indicates that when the information field is in the second state, the first HARQ process ID corresponding to the first transmission block is the HARQ process ID on the second frequency band.
  • the first signaling may be high layer signaling.
  • the terminal device determines the second frequency band according to the indication information of the second frequency band included in the first downlink control information, that is, determines that the first HARQ process ID belongs to the HARQ entity on the second frequency band.
  • the first frequency band and the second frequency band belong to a first frequency band set, and the first frequency band set includes at least two frequency bands.
  • the first frequency band set may further include other frequency bands than the first frequency band and the second frequency band.
  • the terminal device receives the first downlink control information on the second frequency band, where the first downlink control information includes scheduling information of the first data packet and the second data packet.
  • the terminal device determines, according to the second frequency band indication information included in the first downlink control information, that the HARQ process ID corresponding to the first data packet carrying the first transport block in the first frequency band is the first HARQ process ID, where The terminal device can determine that the first data packet and the second data packet belong to the same HARQ process according to the indication information of the second frequency band, and the HARQ process is a HARQ process on the second frequency band.
  • the terminal device determines the second frequency band according to the frequency band in which the first downlink control information is located, that is, determines that the first HARQ process ID belongs to the HARQ entity on the second frequency band.
  • the first frequency band and the second frequency band belong to a first frequency band set, and the first frequency band set includes at least two frequency bands.
  • the first frequency band set may further include other frequency bands than the first frequency band and the second frequency band.
  • the terminal device receives the first downlink control information on the second frequency band, where the first downlink control information includes scheduling information of the first data packet and the second data packet. Further, the terminal device can determine the first downlink control information according to the first downlink control information.
  • the HARQ process number corresponding to the first data packet of the first transmission block in the first frequency band is the first HARQ process ID.
  • the terminal device can determine the first data packet according to the first downlink control information being carried on the second frequency band.
  • the second data packet belongs to the same HARQ process, and the HARQ process is a HARQ process on the second frequency band.
  • the first downlink control information does not need to include the indication information of the second frequency band, and the network device implicitly indicates the second frequency band by using the frequency band that carries the first downlink control information, without requiring additional network devices. Signaling indicates that signaling overhead is saved.
  • the HARQ process number corresponding to the transport block on the second frequency band can be used by other frequency bands than the second frequency band in the first frequency band set.
  • the terminal device receives the third data packet carrying the third transport block on the first frequency band before receiving the acknowledgement feedback of the first transport block and the second transport block, and the third transport block also corresponds to the first
  • the terminal device may determine that the first transport block and the second transport block are the same transport block, and the third transport block is different from the first transport block, although the first frequency band carries the first transport block first.
  • the data packet corresponds to the first HARQ process ID, but the terminal device determines that the first HARQ process ID belongs to the HARQ entity on the second frequency band according to the first downlink control information being carried on the second frequency band or the second downlink control information, without affecting The HARQ process number is used in other frequency bands except the second frequency band in the first frequency band set.
  • the first data packet carrying the first transport block and the second data packet carrying the second transport block scheduled by the first downlink control information belong to the HARQ process on the second frequency band, where the first transport block and The second transport block is the same, and the network device can transmit different transport blocks, such as the third transport block, using the same HARQ process number on other frequency bands in the first frequency band set.
  • the first HARQ process ID is available in the first frequency band, that is, the network device may send the bearer corresponding to the first frequency band.
  • the third data packet of the third transport block of the HARQ process ID, the third transport block is different from the first transport block, and the network device may not send the third data packet.
  • the first frequency band set may be preset in the network device and the terminal device, or may be configured by the network device to the terminal device.
  • the network device may send the information of the first frequency band set to the terminal device by using high layer signaling.
  • the operations in this optional step may be implemented by the modem processor 504 of the above-described terminal device.
  • Step S604 the terminal device jointly decodes the first data packet and the second data packet.
  • Joint decoding means that a plurality of data packets carrying the same transport block are combined and decoded, and the same transport block is obtained after decoding.
  • the action in this step can be implemented by the modem processor 504 of the above terminal device.
  • the joint decoding of multiple transport blocks may refer to combining data packets corresponding to multiple transport blocks to obtain a transport block data packet with higher reliability than decoding of a single data packet, and then combining the transmitted data packets.
  • the process of decoding a block the method of combining two data packets into one data packet depends on the coding rules. Taking simple repeated transmission as an example, if the data packets transmitted by the transmitting end are identical during the two transmissions, the data packet combining rule is that each symbol of the combined data packet is the first two data packets in the merge.
  • the combined data packet has higher decoding reliability.
  • the combined data packet may be larger than the pre-merger data packet (for example, the combination of different redundancy versions of the data packet), and the specific size also depends on the encoding rules. If the merged packet becomes larger, it means that it contains redundant letters. More information, these redundant information can also improve the decoding reliability of the combined data packet.
  • the network device and the terminal device perform the method 600 provided by the embodiment of the present invention, and the network device identifies, by using the same HARQ process ID, multiple data packets carrying multiple transport blocks on different frequency bands, because the multiple transport blocks are Similarly, the terminal device may identify data packets carrying the same transport block on multiple frequency bands according to the HARQ process ID, and jointly decode multiple data packets carrying multiple transport blocks corresponding to the same process number, because multiple bearers are the same.
  • the data packet of the transport block contains more redundant information, so the combination of multiple data packets can use more redundant information to suppress the energy of the interference noise, thereby reducing the error rate of the downlink data transmission and improving the error rate. The reliability of downlink data transmission.
  • the network device can identify, by using the first HARQ process ID, the first frequency band HARQ entity on the first frequency band.
  • the different HARQ processes indicate that the first HARQ process number corresponding to the first transport block and the second transport block does not occupy the HARQ process of the same HARQ process number in the first frequency band.
  • the method in this embodiment may be in the first
  • the first HARQ process ID may also be used to transmit a data packet carrying a transport block different from the first transport block.
  • the method provided in this embodiment can avoid occupying all the same HARQ process IDs in all transmission frequency bands when performing multi-band joint transmission, and reduce the impact on data transmission on the frequency band, that is, the same time can not be reduced in part of the transmission frequency band.
  • the number of HARQ process numbers used ensures the total throughput of the system.
  • the embodiment of the present invention provides another communication method, which is described below in conjunction with FIG. 7.
  • Step S701 The network device sends the indication information of the first frequency band set and the indication information of the first HARQ process ID set to the terminal device by using the first signaling, and correspondingly, the terminal device receives the first signaling.
  • the first frequency band set includes at least two frequency bands, and at least two frequency bands may be used to transmit data packets carrying the same transport block, where the first HARQ process number set includes one or more HARQ process numbers, and the one or more HARQ process numbers It can be used to transmit data packets carrying the same transport block on multiple frequency bands, and the data packets carrying the same transport block correspond to the same HARQ process number in multiple frequency bands.
  • the first signaling is high-level signaling, and the first signaling may be one signaling or multiple signaling, that is, the indication information of the first frequency band set and the indication information of the first HARQ process ID may be in one
  • the signaling may be sent in different signaling.
  • Step S702 The network device sends a first data packet carrying the first transport block on the first frequency band, and the terminal device receives the first data packet that carries the first transport block in the first frequency band.
  • Step S703 The second transmission block is sent to the terminal device on the second frequency band, and the terminal device receives the second data packet carrying the second transmission block on the second frequency band.
  • the first transport block is the same as the second transport block.
  • steps S702 and S703 do not limit the sequence. Step S703 may be performed first, and then S702 may be performed. Alternatively, S702 may be performed first, then step S703 may be performed, or steps S702 and S703 may be simultaneously performed.
  • the network device further sends downlink control information corresponding to the first data packet and the second data packet, where the downlink control information includes a HARQ process ID corresponding to the first data packet and the second data packet.
  • the first frequency band and the second frequency band belong to the first frequency band set, and the first transmission block and the second transmission block correspond to the same first HARQ process ID, and the first HARQ process number belongs to the first HARQ process number set.
  • the first data packet and the second data packet carry the same transport block, ie the first transport block is identical to the second transport block.
  • the action sent in the above steps may be implemented by the transceiver 402 of the network device 201.
  • the processor 401 of the network device 201 may be used to control the implementation of the transceiver 402.
  • the action received in the above steps may be implemented by the transceiver 501 of the above terminal device.
  • the modem processor 504 of the terminal device may also be used to control the implementation of the transceiver 501.
  • Step S704 The terminal device jointly decodes the first data packet and the second data packet, and acquires the same transport block (ie, the first transport block and the second transport block above).
  • the action in this step can be implemented by the modem processor 504 of the above terminal device.
  • the terminal device determines that the data packets received in different frequency bands belonging to the first frequency band set belong to the same HARQ process according to the first HARQ process ID belonging to the first HARQ process ID set, that is, the transport blocks carried by the data packet are the same, and then the multiple data packets are Perform joint decoding. Since multiple data packets carrying the same transport block contain more redundant information, combining and decoding multiple data packets can utilize more redundant information to suppress the energy of interference noise, thereby reducing downlink data transmission. The error rate improves the reliability of downlink data transmission.
  • the present invention also provides an apparatus (e.g., an integrated circuit, a wireless device, a circuit module, etc.) for implementing the above method.
  • an apparatus e.g., an integrated circuit, a wireless device, a circuit module, etc.
  • the means for implementing the power tracker and/or power generator described herein may be a stand-alone device or may be part of a larger device.
  • the device may be (i) a self-contained IC; (ii) a set having one or more 1Cs, which may include a memory IC for storing data and/or instructions; (iii) an RFIC, such as an RF receiver or RF transmitter (iv) an ASIC, such as a mobile station modem; (v) a module that can be embedded in other devices; (vi) a receiver, a cellular phone, a wireless device, a handset, or a mobile unit; (vii) other, etc. Wait.
  • a self-contained IC may include a memory IC for storing data and/or instructions; (iii) an RFIC, such as an RF receiver or RF transmitter (iv) an ASIC, such as a mobile station modem; (v) a module that can be embedded in other devices; (vi) a receiver, a cellular phone, a wireless device, a handset, or a mobile unit; (vii) other, etc. Wait.
  • the method and apparatus provided by the embodiments of the present invention may be applied to a terminal device or a network device (which may be collectively referred to as a wireless device).
  • the terminal device or network device or wireless device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system.
  • the application layer includes applications such as browsers, contacts, word processing software, and instant messaging software.
  • the embodiment of the present invention does not limit the specific structure of the execution body of the method, as long as the transmission signal according to the embodiment of the present invention can be executed by running a program recording the code of the method of the embodiment of the present invention.
  • the method can be communicated.
  • the execution body of the method for wireless communication in the embodiment of the present invention may be a terminal device or a network device, or a function module that can call a program and execute a program in the terminal device or the network device.
  • a computer readable medium may include, but is not limited to, a magnetic storage device (eg, a hard disk, a floppy disk, or a magnetic tape, etc.), such as a compact disc (CD), a digital versatile disc (DVD). Etc.), smart cards and flash devices (eg, rewritable programmable read-only (erasable programmable read-only memory (EPROM), card, stick or key driver, etc.).
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, without limitation, a wireless channel and various other mediums capable of storing, containing, and/or carrying instructions and/or data.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and the present invention should not be The implementation of the embodiments constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the 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 of the embodiment.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the embodiments of the present invention, or the part contributing to the prior art or the part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), A variety of media that can store program code, such as a disk or an optical disk.

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Abstract

本发明实施例提供了一种通信方法和装置。在该方法和装置中，终端设备从网络设备接收第一下行控制信息，第一下行控制信息包括第一混合自动重传请求HARQ进程号，终端设备在第一频段上接收承载第一传输块的第一数据包，在第二频段上接收承载第二传输块的第二数据包，其中，第一HARQ进程号对应第一频段上的第一传输块和第二频段上的第二传输块。终端设备对第一数据包和第二数据包联合译码，第一传输块和第二传输块相同。通过本发明实施例提供的方法和装置，可以提高一种多频段传输场景下的数据传输可靠性。

Description

通信方法和装置 技术领域
本申请涉及通信领域，特别涉及通信领域中通信方法和装置。
背景技术
在长期演进(Long Term Evolution，LTE)系统中，发射端引入混合自动重传请求(hybrid automatic repeat request，HARQ)，这是一种结合纠错编码与自动重传请求(automatic repeat request，ARQ)的技术。一方面，发射端通过纠错编码添加的冗余信息，使得接收端在译码时可以纠正一部分错误，从而减少一部分重传次数(不至于一旦发生任何错误就需要重传)；另一方面，对于纠错编码无法正确纠正的错误，接收端通过ARQ机制请求发送端重发数据。HARQ重传的基本单位是传输块(transport block,TB)，一个TB对应包含一个媒体接入控制(Media Access Control，MAC)层分组数据单元(packet data unit，PDU)的数据块。TB编码后形成可以在物理层传输的数据包，相同HARQ进程中的数据包承载的TB相同。
以下行HARQ来说，网络设备通过物理下行共享信道(physical downlink shared channel,PDSCH)发送TB，并且通过物理下行控制信道(physical downlink control channel,PDCCH)发送下行控制信息，该下行控制信息指示TB对应的HARQ进程号和承载该TB的数据包的调度信息，该调度信息可以包括数据包所使用的时频资源、调制编码方式(modulation and coding scheme，MCS)索引等。终端设备使用检错码来检测接收到的数据包是否出错。如果无错，则终端设备会发送一个确认(acknowledgement，ACK)反馈给网络设备；如果出错，则终端设备会将接收到的错误数据包保存在一个HARQ缓存中，并发送一个否认(negative acknowledgement，NACK)反馈给网络设备，网络设备收到NACK后会重发一个承载相同TB的数据包。
LTE中，网络设备可以并行地使用多个HARQ进程，并在下行控制信息中TB对应HARQ进程号来区分多个进程所属的TB。具体的说，网络设备发送承载对应一个HARQ进程号的TB的数据包后，就停止发送动作等待接收方的确认反馈ACK/否认反馈NACK。在等待一个HARQ进程的反馈时，网络设备可以使用另一个HARQ进程传输不同的TB，从而实现一种等效的连续传输，这些HARQ进程共同组成了一个HARQ实体。
在现有的载波聚合(carrier aggregation，CA)技术中，网络设备可以使用多个CC给终端设备发送下行数据。但是在CA中，每个CC上的HARQ实体是相互独立的，意味着网络设备在每个CC上发送的数据包对应每个CC上单独的HARQ进程，终端设备在译码前无法识别从不同CC上接收的承载多个传输块的多个数据包之间的关系。
发明内容
本发明实施例提供一种通信方法和装置，用以提高多频段传输场景下的数据传输可靠性。
第一方面，本发明实施例提供了一种通信方法。终端设备从网络设备接收第一下行控制信息，第一下行控制信息包括第一混合自动重传请求HARQ进程号。终端设备在第一频段上接收承载第一传输块的第一数据包，在第二频段上接收承载第二传输块的第二数据包，其中，第一HARQ进程号对应第一频段上的第一传输块和第二频段上的第二传输块，所述第一传输块和所述第二传输块相同。终端设备对第一数据包和第二数据包联合译码。
所述终端设备通过对第一数据包和第二数据包联合译码能够获取该传输块(即上文的第一传输块和第二传输块)。
第二方面，本发明实施例提供了一种通信方法。网络设备发送第一下行控制信息给终端设备，所述第一下行控制信息包括第一混合自动重传请求HARQ进程号。所述网络设备在所述第一频段上发送承载第一传输块的第一数据包，在第二频段上发送承载第二传输块的第二数据包给终端设备，其中，所述第一HARQ进程号对应第一频段上的第一传输块和所述第二频段上的所述第二传输块，以及所述第一传输块和所述第二传输块相同。
通过本实施例提供的方法，网络设备用相同的HARQ进程号标识不同频段上的多个传输块，由于所述多个传输块是相同的，终端设备可以根据HARQ进程号识别多个频段上承载相同传输块的数据包，并对承载对应相同进程号的多个传输块的多个数据包进行联合译码，由于多个承载相同传输块的数据包包含了更多的冗余信息，因此将多个数据包合并译码能够利用更多的冗余信息来抑制了干扰噪声的能量，从而降低了下行数据传输的错误率，提高了下行数据传输的可靠性。
在一种可能的设计中，所述终端设备在接收到所述网络设备发送的所述第一传输块和所述第二传输块对应的确认反馈信息之前，所述终端设备在所述第一频段上接收承载第三传输块的第三数据包，相应的，所述网络设备在所述第一频段上发送承载第三传输块的第三数据包，其中，所述第三传输块对应所述第一HARQ进程号，所述第三传输块与所述第一传输块不同。
在该种可能的设计中，一种可选的实施方式中，所述终端设备在接收到所述网络设备发送的所述第一传输块和所述第二传输块对应的确认反馈信息之前，所述第一HARQ进程号在所述第一频段上可用，即在所述第一传输块和所述第二传输块对应的HARQ进程还没有结束的情况下，所述网络设备能够在所述第一频段上使用第一HARQ进程号标识不同的HARQ进程，例如，所述网络设备可以在所述第一频段上发送承载第三传输块的第三数据包，所述第三传输块对应第一HARQ进程号，所述第三传输块与所述第一传输块不同。
通过本实施例提供的方法，在所述第一传输块和所述第二传输块对应的HARQ进程还没有结束的情况下，所述网络设备能够在所述第一频段上使用第一HARQ进程号标识属于第一频段HARQ实体的不同的HARQ进程，表明第一传输块和第二传输块对应的第一HARQ进程号没有占用所述第一频段上的相同HARQ进程号的HARQ进程，例如，本实施例的方法可以在第一频段上还可以使用该第一HARQ进程号发送承载和 第一传输块不同的传输块的数据包。因此本实施例提供的方法在进行多频段联合传输时能够避免占用所有传输频段上的所有相同HARQ进程号，减小了对频段上的数据传输的影响，即没有减少部分传输频段上同一时间可使用的HARQ进程号的数量，保证了系统的总吞吐量。
在一种可能的设计中，所述第一频段和所述第二频段属于第一频段集合，所述第一频段集合包括至少两个频段。所述终端设备在所述第二频段上接收所述第一下行控制信息，相应的，所述网络设备在所述第二频段上发送第一下行控制信息，所述终端设备对所述第一数据包和所述第二数据包联合译码之前，所述终端设备根据所述第一下行控制信息所在的所述第二频段，确定所述第一频段上的所述第一传输块对应的HARQ进程号为所述第一HARQ进程号，即确定所述第二频段所属的第一频段集合内所包括的第一频段上的所述第一传输块对应的HARQ进程号为所述第一HARQ进程号。
在该种可能的设计中，网络设备在第二频段上发送第一下行控制信息，终端设备根据第一下行控制信息所在的频段确定属于相同频段集合的第一频段上的第一传输块对应的HARQ进程号为第一HARQ进程号，而不需要网络设备额外的信令指示，节省了信令开销。
在一种可能的设计中，所述第一频段和所述第二频段属于第一频段集合，所述第一频段集合包括至少两个频段。所述终端设备从所述网络设备接收第一下行控制信息之后，所述终端设备根据所述第二频段确定所述第二频段上的传输块对应的HARQ进程号能够被所述至少两个频段中除所述第二频段之外的其他频段使用。进一步的，终端设备可以确定第一频段的所述第一传输块对应的HARQ进程号为所述第一HARQ进程号。
可选的，所述第一频段集合可以是预定义的。
可选的，所述第一频段集合可以是高层信令配置的。
可选的，所述第一下行控制信息还包括所述第一数据包和所述第二数据包的调度信息。在该种可选的实施方式中，第一下行控制信息同时调度第一频段上的第一数据包和第二频段上的第二数据包，并指示第一传输块和第二传输块对应相同的HARQ进程号。终端设备通过第一下行控制信息中包含的调度信息识别不同频段上对应相同传输块的数据包，降低了调度多频段联合传输的复杂度，且降低了下行控制信令的开销。在该种可能的设计中，终端设备根据接收第一下行控制信息的频段，确定第一传输块和第二传输块对应的第一HARQ进程号能够在同一时间在除该频段外的其他频段上标识不同的HARQ进程。在该种可能的设计中，网络设备在第二频段上发送第一下行控制信息，终端设备根据第一下行控制信息所在的频段确定，而不需要网络设备额外的信令指示，节省了信令开销。
在一种可能的设计中，所述终端设备在第二频段上接收网络设备发送的第二数据包之前，所述终端设备从所述网络设备接收第二下行控制信息，相应的，所述网络设备发送第二下行控制信息给所述终端设备，所述第二下行控制信息包括所述第一HARQ进程号和所述第一数据包的调度信息以及第一指示信息。其中，所述第一下行控制信息还包括所述第一数据包的调度信息，所述第一指示信息指示所述第一HARQ进程号为所述第二频段使用的HARQ进程号。
在该种可能的设计中，所述第一频段和所述第二频段属于第一频段集合，所述第一频段集合包括至少两个频段。所述终端设备从网络设备接收第一下行控制信息之前，所述终端设备通过第一信令接收所述第一频段集合的指示信息和/或所述第二频段的指示信息，相应的，所述网络设备通过第一信令发送所述第一频段集合的指示信息以及所述第二频段的指示信息。其中，所述至少两个频段中除所述第二频段之外的频段能够使用所述第二频段上的传输块对应的HARQ进程号。
可选的，所述第一信令可以为高层信令。
第三方面，本发明实施例提供了一种无线装置，所述无线装置用于执行上述方法中终端设备行为的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
在一个可能的设计中，终端设备的结构中包括收发器、处理器和与所述处理器耦合的存储器。所述收发器用于支持终端设备与网络设备之间的通信，向网络设备发送上述方法中所涉及的信息或者信令，接收网络设备所发送的信息或者信令。所述处理器和与所述处理器耦合的存储器用于实现上述方法实际中终端设备行为的功能。
第四方面，本发明实施例提供了一种网络设备，所述网络设备用于执行上述方法中网络设备行为的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
在一个可能的设计中，网络设备的结构中包括收发器、处理器和与所述处理器耦合的存储器。所述收发器用于支持终端设备与网络设备之间的通信，向终端设备发送上述方法中所涉及的信息或者信令，接收终端设备所发送的信息或者信令。所述处理器和与所述处理器耦合的存储器用于实现上述方法实际中网络设备行为的功能。
第五方面，提供了一种通信装置，所述通信装置用于执行上述方法实际中终端设备或网络设备行为的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第六方面，提供了一种包含指令的计算机存储介质，当其在计算机上运行时，使得计算机执行上述方法实际中终端设备或网络设备行为的功能。
附图说明
图1为LTE系统中的一种无线帧结构的示意图；
图2为HARQ协议的简单示意图；
图3为本发明实施例的一种无线通信系统的示意图；
图4为上述无线通信系统中，网络设备的一种可能的结构示意图；
图5为上述无线通信系统中，终端设备的一种可能的结构示意图；
图6为本发明实施例提供的方法的交互示意图；
图7为本发明实施例提供的方法的交互示意图。
具体实施方式
下面将结合附图，对本发明的实施例进行描述。
本发明实施例中的“一个”意味着单个个体，并不代表只能是一个个体，不能应用于其他个体中。例如，本发明实施例中的“一个终端设备”指的是针对某一个终端设备，并不意味着只能应用于一个特定的终端设备。本申请中，术语“系统”可以和“网络”相互替换使用。
本申请中的“一个实施例”(或“一个实现”)或“实施例”(或“实现”)的引用意味着连同实施例描述的特定特征、结构、特点等包括在至少一个实施例中。因此，说明书的各个位置中出现的“在一个实施例中”或“在实施例中”，并不表示都指代相同实施例。
进一步地，本发明实施例中的“A和/或B”和“A和B中至少一个”的情况下使用术语“和/或”和“至少一个”包括三种方案中的任一种，即，包括A但不包括B的方案、包括B不包括A的方案、以及两个选项A和B都包括的方案。作为另一示例，在“A、B、和/或C”和“A、B、和/或C中至少一个”的情况下，这样的短语包括六种方案中的任一种，即，包括A但不包括B和C的方案、包括B不包括A和C的方案、包括C但不包括A和B的方案，包括A和B但不包括C的方案，包括B和C但不包括A的方案，包括A和C但不包括B的方案，以及三个选项A、B和C都包括的方案。如本领域和相关领域普通技术人员所容易理解的，对于其他类似的描述，本发明实施例均可以按照上述方式理解。
应理解，本发明的技术方案可以应用于任何支持载波聚合(carrier aggregation,CA)或多频段传输的通信系统，例如，release 10及以上版本的长期演进(Long Term Evolution,LTE)系统、未来第五代(Fifth Generation,5G)通信系统等。
本发明实施例描述的通信系统是为了更加清楚的说明本发明实施例的技术方案，并不构成对于本发明实施例提供的技术方案的限定，本领域普通技术人员可知，随着通信系统的演变和新的系统场景的出现，本发明实施例提供的技术方案对于类似的技术问题，同样适用。
第五代(Fifth Generation，5G)移动通信系统技术和标准已经在研究和制定当中，5G中引入了高可靠低时延(Ultra Reliable and Low Latency Communication，URLLC)这一重要的技术需求。URLLC这种新型的业务类型，要求在1ms内完成传输(低时延)，且成功率需要达到99.999％(即错误率10E-5，高可靠性)。5G从兼容性角度包含一条兼容LTE持续演进的分支，也就是说，要利用现有的LTE系统架构，在演进版本的LTE系统中实现URLLC业务的服务。在现有的LTE系统中，下行数据传输的错误率不能满足URLLC业务的高可靠性需求，所以需要进一步降低这一错误概率。一般情况下，网络设备调度给终端设备用于发送下行数据包的频谱带宽越大，数据包中包含的冗余信息就越多，编码速率也相应的越低，这会使得该数据包在译码时的可靠性增加/传输错误率降低。但是系统的频谱带宽存在限制，每个分量载波(Component Carrier，CC)的最大带宽为20MHz，在某些情况下，网络设备即使利用CC的全部带宽向一个终端设备发送下行数据，数据包中包含的冗余信息也不够多，导致数据包译码时的错误率不够低，无法满足URLLC业务需求的可靠性。
本发明实施例考虑在URLLC场景中引入载波聚合(carrier aggregation,CA)技术，在CA中网络设备分配多个CC给一个终端设备，通过多个CC向终端设备发送下行数 据，图1给出了一个CC上的时频资源的一种可能的结构。但是在现有的载波聚合技术中，如背景技术所述，每个CC上的HARQ实体是相互独立的，意味着终端设备不能在译码前区分在不同CC上接收到的承载多个传输块(transport block,TB)的多个数据包之间的关系。下面结合HARQ过程说明这个问题。
图2给出了下行HARQ过程的简单示意图。网络设备向终端设备发送承载TB#1的数据包#1，在调度数据包#1的下行控制信息中包括HARQ进程号和新数据标识(new data indicator,NDI)，下行控制信息与数据包#1一起被发送，例如TB#1对应的HARQ进程号为1，NDI为0。终端设备接收到数据包#1后对数据包#1进行译码，并且如果译码成功则向网络设备发送确认(acknowledge，ACK)反馈，如果译码失败则向网络设备发送否认(negative acknowledgement，NACK)反馈。在图2中，译码过程失败，终端设备反馈NACK请求网络设备重传TB#1。网络设备接收终端设备的NACK之后重传一个承载TB#1的数据包#2，使用与初传相同的HARQ进程号和NDI来指示这是重传，即此时数据包#2和数据包#1承载的TB相同。终端设备正确译码数据包#2，向网络设备发送ACK反馈，网络设备接收到终端设备的ACK反馈后结束TB#1对应的HARQ进程。网络设备使用相同的HARQ进程号传输TB#2，例如图2中，网络设备发送承载TB#2的数据包#3，TB#2对应的HARQ进程号为1，NDI为1，数据包#2和数据包#3对应的下行控制信息中HARQ进程号相同且NDI不同，称为NDI翻转。终端设备接收到包含NDI翻转信息的数据包#3后，确认TB#1对应的HARQ进程结束，即终端设备确定数据包#3和数据包#2承载的TB不同。应理解，如上文的描述，终端设备接收到NDI翻转信息称为终端设备接收到对应TB(TB#1)的确认反馈，例如终端设备接收到TB#1的确认反馈后，确认TB#1对应的HARQ进程结束，HARQ进程号1用来标识下一个不同TB对应的HARQ进程，如TB#2。
结合上述的示例可以看出，在每个HARQ实体中一个TB与一个HARQ进程号绑定，只有当该TB完成传输或超过最大重传次数后，即该HARQ进程结束后，该HARQ进程号才可以被其他TB使用。在支持载波聚合的LTE系统中，每个分量载波(component carrier，CC)上的HARQ实体是相互独立的，即不同CC上使用的HARQ进程号之间没有关系，不同CC上使用的HARQ进程号仅用于本CC。然而，这种方案中，将载波聚合直接应用到URLLC业务时，可能还会存在可靠性达不到URLLC需求的问题，因此，本发明实施例提供了一种能够提高数据传输可靠性的方案。
图3给出了本发明实施例的一种应用场景，该场景中包括网络设备201，处在网络设备201覆盖范围内并与网络设备201进行通信的终端设备211-213。
应理解，在本发明实施例中，终端设备也可称之为用户设备(User Equipment，UE)、移动台(Mobile Station，MS)、移动终端(Mobile Terminal)等，该终端设备可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，例如，终端设备是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self  driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。
在本发明实施例中，所述网络设备(例如网络设备201)是一种部署在无线接入网中用以为终端设备提供无线通信功能的装置。所述网络设备可以包括各种形式的宏基站，微基站(也称为小站)，中继站，接入点等。网络设备可以是GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB，NB)，也可以是LTE或eLTE中的演进型基站(Evolutional Node B，eNB或e-NodeB)，也可以是下一代移动网络，例如5G(fifth generation)，中的基站gNB((next)generation NodeB)。
以LTE中的载波聚合CA举例，CA是将2个或更多的CC聚合在一起以支持更大的传输带宽。LTE系统的Release-10版本中，最大支持100MHz传输带宽(即CA最大支持5个CC)，在之后的版本中，参与CA的CC进一步增加。如图3所示，每个CC的最大带宽为20MHz，最大可使用的资源是110个资源块(resource block，RB)。CA支持不同CC之间的聚合，可以是相同或不同带宽的CC(例如1.4、3、5、10、15、20MHz)，可以是同一频带内或不同频带内的CC。网络设备配置多个CC给终端设备，通过这些CC发送下行数据。图3所示的通信场景为本发明实施例可应用的通信场景的一种示例，并不造成对本发明实施例应用场景的限制。
终端设备可以支持用于无线通信的一种或多种无线技术，例如5G,LTE,WCDMA,CDMA,1X,时分-同步码分多址(Time Division-Synchronous Code Division Multiple Access,TS-SCDMA),GSM,802.11等等。终端设备支持载波聚合技术。
多个终端设备可以执行相同或者不同的业务。例如，移动宽带业务，增强移动宽带(Enhanced Mobile Broadband，eMBB)业务，终端设备高可靠极低时延通信(Ultra-Reliable and Low-Latency Communication，URLLC)业务等等。
进一步地，上述网络设备201的一种可能的结构示意图可以如图4所示。该网络设备201能够执行本发明实施例提供的方法。其中，该网络设备201可以包括：控制器或处理器401(下文以处理器401为例进行说明)以及收发器402。控制器/处理器401有时也称为调制解调器处理器(modem processor)。调制解调器处理器401可包括基带处理器(baseband processor，BBP)(未示出)，该基带处理器处理经数字化的收到信号以提取该信号中传达的信息或数据比特。如此，BBP通常按需或按期望实现在调制解调器处理器401内的一个或多个数字信号处理器(digital signal processor，DSP)中或实现为分开的集成电路(integrated circuit，IC)。
收发器402可以用于支持网络设备201与终端设备之间收发信息，以及支持终端设备之间进行无线电通信。所述处理器401还可以用于执行各种终端设备与其他网络设备通信的功能。在上行链路，来自终端设备的上行链路信号经由天线接收，由收发器402进行调解，并进一步处理器401进行处理来恢复终端设备所发送的业务数据和/或信令信息。在下行链路上，业务数据和/或信令消息由终端设备进行处理，并由收发器402进行调制来产生下行链路信号，并经由天线发射给终端设备。所述网络设备设备201还可以包括存储器403，可以用于存储该网络设备201的程序代码和/或数据。 收发器402可以包括独立的接收器和发送器电路，也可以是同一个电路实现收发功能。所述网络设备201还可以包括通信单元404，用于支持所述网路设备201与其他网络实体进行通信。例如,用于支持所述网络设备201与核心网的网络设备等进行通信。
可选的，网络设备还可以包括总线。其中，收发器402、存储器403以及通信单元404可以通过总线与处理器401连接。例如，总线可以是外设部件互连标准(Peripheral Component Interconnect，PCI)总线或扩展工业标准结构(Extended Industry Standard Architecture，EISA)总线等。所述总线可以包括地址总线、数据总线、以及控制总线等。
图5为上述无线通信系统中，终端设备的一种可能的结构示意图。该终端设备能够执行本发明实施例提供的方法。该终端设备可以是三个终端设备211-213中的任一个。所述终端设备包括收发器501，应用处理器(application processor)302，存储器503和调制解调器处理器(modem processor)504。
收发器501可以调节(例如，模拟转换、滤波、放大和上变频等)该输出采样并生成上行链路信号，该上行链路信号经由天线发射给上述实施例中所述的基站。在下行链路上，天线接收网络设备发射的下行链路信号。收发器501可以调节(例如，滤波、放大、下变频以及数字化等)从天线接收的信号并提供输入采样。
调制解调器处理器504有时也称为控制器或处理器，可包括基带处理器(baseband processor,BBP)(未示出)，该基带处理器处理经数字化的收到信号以提取该信号中传达的信息或数据比特。BBP通常按需或按期望实现在调制解调器处理器504内的一个或多个数字中或实现为分开的集成电路(IC)。
在一个设计中，调制解调器处理器(modem processor)504可包括编码器5041，调制器5042，解码器5043，解调器5044。编码器5041用于对待发送信号进行编码。例如，编码器5041可用于接收要在上行链路上发送的业务数据和/或信令消息，并对业务数据和信令消息进行处理(例如，格式化、编码、或交织等)。调制器5042用于对编码器5041的输出信号进行调制。例如，调制器可对编码器的输出信号(数据和/或信令)进行符号映射和/或调制等处理，并提供输出采样。解调器5044用于对输入信号进行解调处理。例如，解调器5044处理输入采样并提供符号估计。解码器5043用于对解调后的输入信号进行解码。例如，解码器5043对解调后的输入信号解交织、和/或解码等处理，并输出解码后的信号(数据和/或信令)。编码器5041、调制器5042、解调器5044和解码器5043可以由合成的调制解调处理器504来实现。这些单元根据无线接入网采用的无线接入技术来进行处理。
调制解调器处理器504从应用处理器502接收可表示语音、数据或控制信息的数字化数据，并对这些数字化数据处理后以供传输。所属调制解调器处理器可以支持多种通信系统的多种无线通信协议中的一种或多种，例如LTE,新空口，通用移动通信系统(Universal Mobile Telecommunications System，UMTS)，高速分组接入(High Speed Packet Access，HSPA)等等。可选的，调制解调器处理器304中也可以包括一个或多个存储器。
可选的，该调制解调器处理器504和应用处理器502可以是集成在一个处理器芯片中。
存储器503用于存储用于支持所述终端设备通信的程序代码(有时也称为程序，指令，软件等)和/或数据。
需要说明的是，该存储器503或存储器503可以包括一个或多个存储单元，例如，可以是用于存储程序代码的处理器401或调制解调器处理器504或应用处理器502内部的存储单元，或者可以是与处理器401或调制解调器处理器504或应用处理器502独立的外部存储单元，或者还可以是包括处理器401或调制解调器处理器504或应用处理器502内部的存储单元以及与处理器401或调制解调器处理器504或应用处理器502独立的外部存储单元的部件。
处理器401和调制解调器处理器501可以是相同类型的处理器，也可以是不同类型的处理器。例如可以实现在中央处理器(Central Processing Unit，CPU)，通用处理器，数字信号处理器(Digital Signal Processor，DSP)，专用集成电路(Application-Specific Integrated Circuit，ASIC)，现场可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件、其他集成电路、或者其任意组合。处理器401和调制解调器处理器501可以实现或执行结合本发明实施例公开内容所描述的各种示例性的逻辑方框，模块和电路。所述处理器也可以是实现计算功能器件的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合或者片上系统(system-on-a-chip，SOC)等等。
本领域技术人员能够理解，结合本申请所公开的诸方面描述的各种解说性逻辑块、模块、电路和算法可被实现为电子硬件、存储在存储器中或另一计算机可读介质中并由处理器或其它处理设备执行的指令、或这两者的组合。作为示例，本文中描述的设备可用在任何电路、硬件组件、IC、或IC芯片中。本申请所公开的存储器可以是任何类型和大小的存储器，且可被配置成存储所需的任何类型的信息。为清楚地解说这种可互换性，以上已经以其功能性的形式一般地描述了各种解说性组件、框、模块、电路和步骤。此类功能性如何被实现取决于具体应用、设计选择和/或加诸于整体系统上的设计约束。本领域技术人员可针对每种特定应用以不同方式来实现所描述的功能性，但此类实现决策不应被解读为致使脱离本发明的范围。
本发明实施例提供一种通信方法，以提高多频段传输场景下的数据传输可靠性。进一步的，本发明实施例提供的方法能够避免占用多个频段上的HARQ进程号，减少多频段传输对单频段数据传输的影响。
应理解，本发明实施例中描述的频段表示一段连续的频域资源，可以单独用于数据传输。本发明实施例中的频段可以是载波聚合(carrier aggregation，CA)技术中的分量载波，也可以是5G新空口(New Radio，NR)系统中的带宽部分(bandwidth part，BWP)，每个BWP的带宽小于或等于终端设备支持的最大带宽，也可以是未来通信系统中概念相同的其他频段。
在本发明实施例中，承载相同的传输块的数据包指数据包中承载的编码前比特信息相同，这里的编码前比特可能是网络设备与终端设备之间传输的数据业务，例如文件下载，视频传输等，也可能是语音通信业务。传输块中包含的数据可以是一个媒体接入控制(Media Access Control，MAC)层分组数据单元(packet data unit，PDU)的数据块。传输块传输块经过编码后，可能成为不同的数据包，当然，也可能是相同的数据包。因此， 本发明实施例中承载相同传输块的数据包可以是相同的，也可以是不同的。下面以LTE系统中使用的Turbo编码为例解释相同的传输块是如何经过编码，变成不同的数据包的：
应该明确的是，在利用Turbo编码器将一个传输块编码为数据包的过程中，发射机(在本例中是网络设备)，还需要为编码器提供数据包的编码速率(即传输块包含的比特数与编码后数据包包含的比特数之比)和冗余版本号，编码器才能正确进行编码。
一个包含N个比特的传输块在Turbo编码器中首先被编码为编码速率为1/3的母码，即母码长度为3N比特；然后编码器根据需要的编码速率和冗余版本号，将母码中的比特依次挑出，并组成数据包，这里挑出的母码中比特的规则由冗余版本号决定，挑出比特的数量由编码速率决定。当编码速率小于1/3时，母码中的某些比特不会出现在数据包中；当编码速率大于或等于1/3时，母码中的所有比特都会出现在数据包中，且可能有一些比特重复出现在数据包中。所以相同的传输块经过编码器时，若冗余版本号，编码速率和调制方式都相同，则数据包也相同；若冗余版本号或编码速率或调制方式有至少一个不同，则数据包也不同。
图6给出了本发明实施例提供的一种通信方法的交互示意图。在本实施例中网络设备网络设备在属于第一频段集合的至少两个频段上发送承载相同传输块的数据包给终端设备，终端设备对承载相同传输块的数据包进行联合译码。
S601，网络设备发送第一下行控制信息，终端设备接收第一下行控制信息。
本步骤中，第一下行控制信息可以包括第一HARQ进程号。该第一HARQ进程号对应第一传输块和第二传输块，表示第一传输块和第二传输块属于相同的HARQ进程，即第一传输块和第二传输块相同。
进一步的，该第一下行控制信息还可以包括承载第一传输块第一数据包的调度信息。这里的调度信息例如可以包括：第一频段上用于发送第一数据包的时频资源的信息、调制编码方式(Modulation and Coding Scheme，MCS)索引等。
可选的，该第一下行控制信息还可以包括第二频段上承载第二传输块的第二数据包的调度信息。其中，该调度信息可以包括第二频段上用于发送第二数据包的时频资源的信息和MCS索引等。这种情况下，第一下行控制信息同时调度两个频段上发送的承载相同传输块的数据包。即，通过一个下行控制信息调度了两个数据包，该两个数据包分别在不同的频段上发送，并且承载的传输块是相同的。
一方面，通过该种可选的实施方式，网络设备通过一个下行控制信息调度两个频段上的数据包，且两个数据包承载相同的传输块，在一个下行控制信息中两个数据包相同的信息字段可以被复用，例如第一HARQ进程号，从而可以节约信令开销。
另一方面，通过该种可选的实施方式，终端设备通过下行控制信息所在的频段位置，即可确定所述第一频段上的所述第一传输块对应的HARQ进程号为所述第一HARQ进程号，同样节约了通知第一传输块对应的进程号的信令开销。
可选的，本发明实施例还可以包括步骤S601’，网络设备发送第二下行控制信息，终端设备接收第二下行控制信息。
进一步的，该第二下行控制信息可以包括第一数据包的调度信息、第一HARQ进程号和第一指示信息，第一指示信息第一HARQ进程号属于第二频段上的HARQ实体。
可选地，在网络设备发送第一下行控制信息和第二下行控制信息之前，网络设备 通过第一信令发送第一频段集合的指示信息以及第二频段的指示信息，其中，第一频段和第二频段属于第一频段集合，第一频段集合包括至少两个频段，至少两个频段中除第二频段之外的频段能够使用第二频段上的传输块对应的HARQ进程号。第一信令可以为高层信令，第一信令可以是一条信令或多条信令，即第一频段集合的指示信息和第二频段的指示信息可以是在一条信令中发送，也可以是在不同信令中发送。所述高层信令可以是如下消息中的一种或多种：主信息块(master information block，MIB)消息，系统信息，以及无线资源控制(radio resource control，RRC)消息。进一步的，系统信息可以是系统信息块(system information broadcast，SIB)消息，或者是用于配置随机接入信道(random access channel，RACH)资源的系统信息块消息。RRC消息可以是公共RRC消息，即发送给一个小区内的终端设备的RRC消息，或者可以是终端设备特定的RRC消息，即发送给特定终端设备的RRC消息。
可选地，第一频段集合的指示信息和第二频段的指示信息可以为通信网络预定义的。
可以理解的是，本实施例中的步骤S601和S601’并不限定先后顺序。可以先执行步骤S601，后执行S601’，或者，可以先执行S601’，后执行步骤S601，或者可以步骤S601’和S601同时执行。
可以理解的是，本发明实施例是以两个数据包为例进行说明，本发明实施例并不限于是两个数据包以及两个频段。本领域技术人员根据本发明实施例的方案能够理解当然可以是不限于两个数据包和两个的频段。
S602，网络设备在第一频段上发送承载第一传输块的第一数据包，终端设备在第一频段上接收所述第一数据包。
S603，网络设备在第二频段上发送承载第二传输块的第二数据包，终端设备在第二频段上接收所述第二数据包。
需要说明的是，步骤S602和S603并不限定先后顺序，可以先执行步骤S603，后执行S602，或者，可以先执行S602，后执行步骤S603，或者可以步骤S602和S603同时执行。
本实施例中，第一数据包和第二数据包对应的是同一个进程号，即第一HARQ进程号，表示第一数据包和第二数据包属于相同的HARQ进程，第一数据包承载的第一传输块和第二数据包承载的第二传输块相同。相同的HARQ进程中的数据包承载相同的传输块，终端设备对相同HARQ进程中的数据包进行联合译码，多个承载相同传输块的数据包包含的冗余信息更多，增加了译码可靠性，进而提高了下行传输的可靠性。
第一数据包和第二数据包承载的传输块是相同的。但是第一数据包和第二数据包可以是相同的，也可以是不同的，例如，传输块经过编码后，可能由于不同的冗余版本号，编码速率和调制方式成为不同的数据包，或者由于相同的编码和调制方式形成相同的数据包。例如，在LTE系统中，初传与重传的数据包一般都是不同的数据包，但承载着相同的传输块。通常这些数据包的编码速率和调制方式相同，只是冗余版本不同。相比利用多个相同的冗余版本的数据包进行联合译码，利用不同的冗余版本联合译码有利于增加系统的可靠性。如前文中冗余版本对编码的影响的描述，不同的冗余版本实际上是选取了编码中母码的不同比特。在编码速率小于1/3的情况下，母码中有些 比特没有出现在数据包中。由于不同的冗余版本选择了母码中的不同比特，所以相比只传输单一的冗余版本，通过不同的冗余版本可能将母码完整地恢复，进而达到更高的可靠性。
上述步骤中发送的动作可以由上述网络设备201的收发器402来实现，当然，也可以是上述网络设备201的处理器401来控制收发器402实现。
上述步骤中接收的动作可以由上述终端设备的收发器501来实现，当然，也可以是上述终端设备的调制解调器处理器504来控制收发器501实现。
可选的，步骤S603之前，本实施例还可以包括：终端设备确定该第二频段。
进一步的，本实施例提供了多种方式确定第二频段，即确定第一HARQ进程号属于第二频段上的HARQ实体。
一种实施方式中，终端设备根据第二下行控制信息确定第二频段，即确定第一HARQ进程号属于第二频段上的HARQ实体。在本实施方式中，第二下行控制信息中包括第一HARQ进程号和第一指示信息，第一指示信息指示第一HARQ进程号为第二频段使用的HARQ进程号。
在一个示例中，第二下行控制信息中新增一个1比特的信息域。若信息域为第一状态，例如0，则表示第一传输块对应的第一HARQ进程号属于承载第一数据包的频段上的HARQ实体，即第一频段上的HARQ实体，具体传输方式与现有系统相同；若信息域为第二状态，例如1，则表示第一传输块对应的第一HARQ进程号为第二频段上的HARQ进程号，属于第二频段上的HARQ实体，网络设备可以在第一频段上使用第一HARQ进程号传输其他承载不同传输块的数据包。该信息域为第二状态表明第一下行控制信息中包括第一指示信息。第一状态和第二状态可以是预定义的。
可选的，在该种实施方式中，终端设备接收第一下行控制信息之前，终端设备还通过第一信令接收第二频段的指示信息，终端设备根据第一指示信息和/或第二频段的指示信息确定第二频段。第二频段的指示信息指示当信息域为第二状态时，第一传输块对应的第一HARQ进程号为第二频段上的HARQ进程号。第一信令可以为高层信令。
又一种实施方式中，终端设备根据第一下行控制信息中包含的第二频段的指示信息，确定第二频段，即确定第一HARQ进程号属于第二频段上的HARQ实体。第一频段和第二频段属于第一频段集合，第一频段集合包括至少两个频段。例如，该第一频段集合还可以包括除所述第一频段和第二频段之外的其他频段。在本实施方式中，终端设备在第二频段上接收第一下行控制信息，该第一下行控制信息包括第一数据包和第二数据包的调度信息。进一步的，终端设备根据第一下行控制信息中包含的第二频段指示信息确定第一频段上的承载第一传输块的第一数据包对应的HARQ进程号是第一HARQ进程号，具体的，终端设备根据第二频段的指示信息能够确定第一数据包和第二数据包属于相同的HARQ进程，且该HARQ进程为第二频段上的HARQ进程。
又一种实施方式中，终端设备根据第一下行控制信息所在的频段确定第二频段，即确定第一HARQ进程号属于第二频段上的HARQ实体。第一频段和第二频段属于第一频段集合，第一频段集合包括至少两个频段。例如，该第一频段集合还可以包括除所述第一频段和第二频段之外的其他频段。这样，在本实施方式中，终端设备在第二频段上接收第一下行控制信息，该第一下行控制信息包括第一数据包和第二数据包的调度信息。进一步的，终端设备根据第一下行控制信息承载在第二频段上能够确定第 一频段上的承接第一传输块的第一数据包对应的HARQ进程号是第一HARQ进程号，具体的，终端设备根据第一下行控制信息承载在第二频段上能够确定第一数据包和第二数据包属于相同的HARQ进程，且该HARQ进程为第二频段上的HARQ进程。在本实施方式中，第一下行控制信息中不需要包含第二频段的指示信息，网络设备通过承载第一下行控制信息的频段隐式地指示第二频段，而不需要网络设备额外的信令指示，节省了信令开销。
在上述实施方式中，第二频段上的传输块对应的HARQ进程号能够被所述第一频段集合中除所述第二频段之外的其他频段使用。例如，具体的说，终端设备在接收到第一传输块和第二传输块的确认反馈之前，在第一频段上接收承载第三传输块的第三数据包，第三传输块也对应第一HARQ进程号，终端设备可以确定第一传输块和第二传输块为相同的传输块，而第三传输块与第一传输块不同，虽然此时第一频段上承载第一传输块的第一数据包对应第一HARQ进程号，但是终端设备根据第一下行控制信息承载在第二频段上或第二下行控制信息确定该第一HARQ进程号属于第二频段上的HARQ实体，而不影响第一频段集合中除第二频段外的其他频段上使用该HARQ进程号。具体的说，第一下行控制信息调度的承载第一传输块的第一数据包和承载第二传输块的第二数据包都属于第二频段上的HARQ进程，其中，第一传输块和第二传输块相同，而网络设备在第一频段集合中的其他频段上可以使用相同的HARQ进程号传输不同的传输块，例如第三传输块。
需要说明的是，在终端设备接收第一传输块和第二传输块对应的确认反馈信息之前，第一HARQ进程号在第一频段上可用，即网络设备可以在第一频段上发送承载对应第一HARQ进程号的第三传输块的第三数据包，第三传输块与第一传输块不同，网络设备也可以不发送所述第三数据包。
进一步的，该第一频段集合可以是预先设置在网络设备和终端设备中，或者，可以是由网络设备配置给终端设备。例如，网络设备可以通过高层信令将该第一频段集合的信息发送给终端设备。
本可选步骤中的操作可以有上述终端设备的调制解调处理器504实现。
步骤S604，终端设备对第一数据包和第二数据包进行联合译码。
联合译码指将承载相同传输块的多个数据包合并后进行译码，译码后获取该相同的传输块。
本步骤中动作可以由上述终端设备的调制解调器处理器504来实现。
多个传输块联合译码，可以是指将多个传输块对应的数据包先进行合并，从而得到一个比单独一个数据包译码可靠性更高的传输块数据包，然后对合并后的传输块进行译码的过程。在联合译码中，将两个数据包合并为一个数据包的方法，取决于编码规则。以简单重复传输为例，即若在两次传输过程中，发送端发射的数据包完全相同，则数据包合并规则为，合并后的数据包的每一个符号，为合并前两个数据包中对应符号的平均值，在这一取平均值的过程中，数据包所承载的数据能量不变，而干扰噪声的能量得到了抑制，所以合并后的数据包具有更高的译码可靠性。值得注意的是，合并后的数据包可能比合并前的数据包更大(例如不同冗余版本的数据包的合并)，具体大小同样取决于编码规则。若合并后的数据包变得更大，意味着其中包含的冗余信 息更多，这些冗余信息同样可以提升合并后数据包的译码可靠性。因此，网络设备和终端设备通过执行本发明实施例提供的方法600，网络设备用相同的HARQ进程号标识不同频段上的承载多个传输块的多个数据包，由于所述多个传输块是相同的，终端设备可以根据HARQ进程号识别多个频段上承载相同传输块的数据包，并对承载对应相同进程号的多个传输块的多个数据包进行联合译码，由于多个承载相同传输块的数据包包含了更多的冗余信息，因此将多个数据包合并译码能够利用更多的冗余信息来抑制了干扰噪声的能量，从而降低了下行数据传输的错误率，提高了下行数据传输的可靠性。并且在所述第一传输块和所述第二传输块对应的HARQ进程还没有结束的情况下，网络设备能够在所述第一频段上使用第一HARQ进程号标识属于第一频段HARQ实体的不同的HARQ进程，表明第一传输块和第二传输块对应的第一HARQ进程号没有占用所述第一频段上的相同HARQ进程号的HARQ进程，例如，本实施例的方法可以在第一频段上还可以使用该第一HARQ进程号发送承载和第一传输块不同的传输块的数据包。因此本实施例提供的方法在进行多频段联合传输时能够避免占用所有传输频段上的所有相同HARQ进程号，减小了对频段上的数据传输的影响，即没有减少部分传输频段上同一时间可使用的HARQ进程号的数量，保证了系统的总吞吐量。可选地，本发明实施例提供又一种通信方法，下面结合图7描述该方法。
步骤S701：网络设备通过第一信令发送第一频段集合的指示信息和第一HARQ进程号集合的指示信息给终端设备，相应的，终端设备接收第一信令。第一频段集合包括至少两个频段，至少两个频段可以用于传输承载相同传输块的数据包，第一HARQ进程号集合包括一个或多个HARQ进程号，所述一个或多个HARQ进程号能够用于多个频段上传输承载相同传输块的数据包，且承载相同传输块的数据包在多个频段上对应相同的HARQ进程号。
需要说明的是，第一信令为高层信令，第一信令可以是一条信令或多条信令，即第一频段集合的指示信息和第一HARQ进程号的指示信息可以是在一条信令中发送，也可以是在不同信令中发送。
步骤S702：网络设备在第一频段上发送承载第一传输块的第一数据包，终端设备在第一频段上接收承载第一传输块的第一数据包。
步骤S703：在第二频段上发送第二传输块给终端设备，终端设备在第二频段上接收承载第二传输块的第二数据包。
所述第一传输块与所述第二传输块相同。
需要说明的是，步骤S702和S703并不限定先后顺序，可以先执行步骤S703，后执行S702，或者，可以先执行S702，后执行步骤S703，或者可以步骤S702和S703同时执行。在步骤S702和S703之前，网络设备还发送第一数据包和第二数据包对应的下行控制信息，下行控制信息中包含第一数据包和第二数据包对应的HARQ进程号。第一频段和第二频段属于第一频段集合，第一传输块和第二传输块对应相同的第一HARQ进程号，第一HARQ进程号属于第一HARQ进程号集合。第一数据包和第二数据包承载相同的传输块，即第一传输块与第二传输块相同。
上述步骤中发送的动作可以由上述网络设备201的收发器402来实现，当然，也可以是上述网络设备201的处理器401来控制收发器402实现。
上述步骤中接收的动作可以由上述终端设备的收发器501来实现，当然，也可以是上述终端设备的调制解调器处理器504来控制收发器501实现。
步骤S704：终端设备对第一数据包和第二数据包进行联合译码，获取该相同的传输块(即上文的第一传输块和第二传输块)。本步骤中动作可以由上述终端设备的调制解调器处理器504来实现。
终端设备根据第一HARQ进程号属于第一HARQ进程号集合确定属于第一频段集合中不同频段上接收到的数据包属于同一HARQ进程，即数据包承载的传输块相同，进而对多个数据包进行联合译码。由于多个承载相同传输块的数据包包含了更多的冗余信息，因此将多个数据包合并译码能够利用更多的冗余信息来抑制了干扰噪声的能量，从而降低了下行数据传输的错误率，提高了下行数据传输的可靠性。
本发明示例还提供一种装置(例如，集成电路、无线设备、电路模块等)用于实现上述方法。实现本文描述的功率跟踪器和/或供电发生器的装置可以是自立设备或者可以是较大设备的一部分。设备可以是(i)自立的IC；(ii)具有一个或多个1C的集合，其可包括用于存储数据和/或指令的存储器IC；(iii)RFIC，诸如RF接收机或RF发射机/接收机；(iv)ASIC，诸如移动站调制解调器；(v)可嵌入在其他设备内的模块；(vi)接收机、蜂窝电话、无线设备、手持机、或者移动单元；(vii)其他等等。
本发明实施例提供的方法和装置，可以应用于终端设备或网络设备(可以统称为无线设备)。该终端设备或网络设备或无线设备可以包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、以及即时通信软件等应用。并且，在本发明实施例中，本发明实施例并不限定方法的执行主体的具体结构，只要能够通过运行记录有本发明实施例的方法的代码的程序，以根据本发明实施例的传输信号的方法进行通信即可，例如，本发明实施例的无线通信的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明实施例的范围。
此外，本发明实施例的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于:磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读 存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本发明实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
应理解，在本发明实施例的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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例方案的目的。
所述功能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，本发明实施例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设备(可以是个人计算机，服务器，或者网络设备等)执行本发明实施例各个实施例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，仅为本发明实施例的具体实施方式，但本发明实施例的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明实施例揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明实施例的保护范围之内。

Claims (33)

  1. 一种通信方法，其特征在于，包括：
    终端设备从网络设备接收第一下行控制信息，所述第一下行控制信息包括第一混合自动重传请求HARQ进程号；
    所述终端设备在第一频段上接收承载第一传输块的第一数据包，在第二频段上接收承载第二传输块的第二数据包，其中，所述第一HARQ进程号对应所述第一频段上的所述第一传输块和所述第二频段上的所述第二传输块，所述第一传输块和第二传输块相同；以及
    所述终端设备对所述第一数据包和所述第二数据包联合译码。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    在接收到所述第一传输块和所述第二传输块对应的确认反馈信息之前，所述终端设备在所述第一频段上接收承载第三传输块的第三数据包，其中，所述第三传输块对应所述第一HARQ进程号，所述第三传输块与所述第一传输块不同。
  3. 根据权利要求1或2所述的方法，其特征在于，
    所述第一频段和所述第二频段属于第一频段集合，所述第一频段集合包括至少两个频段；
    所述终端设备从所述网络设备接收所述第一下行控制信息，包括：
    所述终端设备在所述第二频段上从所述网络设备接收所述第一下行控制信息；
    所述终端设备对所述第一数据包和所述第二数据包联合译码之前，所述方法还包括：
    所述终端设备根据所述第一下行控制信息所在的所述第二频段，确定所述第一频段上的所述第二传输块对应的HARQ进程号为所述第一HARQ进程号。
  4. 根据权利要求3所述的方法，其特征在于，包括：
    所述第一频段集合是预定义的，或者，
    所述第一频段集合是高层信令配置的。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，
    所述第一下行控制信息还包括所述第一数据包和所述第二数据包的调度信息。
  6. 根据权利要求1或2所述的方法，其特征在于，所述终端设备在第二频段上接收所述第二数据包之前，还包括：
    所述终端设备从所述网络设备接收第二下行控制信息，所述第二下行控制信息包括所述第一HARQ进程号和所述第一数据包的调度信息以及第一指示信息，所述第一指示信息指示所述第一HARQ进程号为所述第二频段使用的HARQ进程号，其中，
    所述第一下行控制信息还包括所述第二数据包的调度信息。
  7. 根据权利要求6所述的方法，其特征在于，
    所述第一频段和所述第二频段属于第一频段集合，所述第一频段集合包括至少两个频段；
    所述终端设备从所述网络设备接收第一下行控制信息之前，还包括：
    所述终端设备通过第一信令接收所述第一频段集合的指示信息和/或所述第二频段的指示信息，其中，所述至少两个频段中除所述第二频段之外的频段能够使用所述 第二频段上的传输块对应的HARQ进程号。
  8. 根据权利要求7所述的方法，其特征在于，包括：
    第一信令为高层信令。
  9. 一种通信方法，其特征在于，包括：
    网络设备发送第一下行控制信息给终端设备，所述第一下行控制信息包括第一混合自动重传请求HARQ进程号；
    所述网络设备在第一频段上发送承载第一传输块的第一数据包，在第二频段上发送承载第二传输块的第二数据包给终端设备，其中，所述第一HARQ进程号对应第一频段上的第一传输块和所述第二频段上的所述第二传输块，以及所述第一传输块和所述第二传输相同。
  10. 根据权利要求9所述的方法，其特征在于，还包括：
    所述网络设备在发送所述第一传输块和所述第二传输块对应的确认反馈信息之前，所述网络设备在所述第一频段上发送承载第三传输块的第三数据包，其中，所述第三传输块对应所述第一HARQ进程号，所述第三传输块与所述第一传输块不同。
  11. 根据权利要求9或10所述的方法，其特征在于，所述第一频段和所述第二频段属于第一频段集合，所述第一频段集合包括至少两个频段；
    所述网络设备发送第一下行控制信息给所述终端设备，包括：
    所述网络设备在所述第二频段上给所述终端设备发送所述第一下行控制信息，所述第二频段上的传输块对应的HARQ进程号能够被所述至少两个频段中除所述第二频段之外的其他频段使用。
  12. 根据权利要求11所述的方法，其特征在于，
    所述第一频段集合是预定义的，或者，
    所述第一频段集合是高层信令配置的。
  13. 根据权利要求9-12任一项所述的方法，其特征在于，
    所述第一下行控制信息还包括所述第一数据包和所述第二数据包的调度信息。
  14. 根据权利要求9或10所述的方法，其特征在于，所述网络设备在第二频段上发送所述第二数据包给所述终端设备之前，还包括：
    所述网络设备发送第二下行控制信息给所述终端设备，所述第二下行控制信息包括所述第一HARQ进程号和所述第一数据包的调度信息以及第一指示信息，所述第一指示信息指示所述第一HARQ进程号为所述第二频段使用的HARQ进程号，其中，
    所述第一下行控制信息还包括所述第二数据包的调度信息。
  15. 根据权利要求14所述的方法，其特征在于，所述网络设备发送第一下行控制信息给所述终端设备之前，所述方法还包括：
    所述网络设备通过第一信令发送所述第一频段集合的指示信息以及所述第二频段的指示信息，其中，所述至少两个频段中除所述第二频段之外的频段能够使用所述第二频段上的传输块对应的HARQ进程号。
  16. 根据权利要求15所述的方法，其特征在于，包括：
    第一信令为高层信令。
  17. 一种无线装置，其特征在于，包括：
    处理器和与所述处理器耦合的存储器和收发器；其中，
    所述收发器用于，接收第一下行控制信息，所述第一下行控制信息包括第一混合自动重传请求HARQ进程号；
    所述收发器还用于，在第一频段上接收承载第一传输块的第一数据包，在第二频段上接收承载第二传输块的第二数据包，其中，所述第一HARQ进程号对应第一频段上的第一传输块和所述第二频段上的所述第二传输块；以及
    所述处理器用于，对所述第一数据包和所述第二数据包联合译码。
  18. 根据权利要求17所述的无线装置，其特征在于，
    在接收到所述第一传输块和所述第二传输块对应的确认反馈信息之前，所述收发器还用于，在所述第一频段上接收承载第三传输块的第三数据包，其中，所述第三传输块对应所述第一HARQ进程号，所述第三传输块与所述第一传输块不同。
  19. 根据权利要求17或18所述的无线装置，其特征在于，所述第一频段和所述第二频段属于第一频段集合，所述第一频段集合包括至少两个频段；
    所述收发器用于接收第一下行控制信息，包括：
    所述收发器还用于在所述第二频段上接收所述第一下行控制信息；
    所述处理器用于对所述第一数据包和所述第二数据包联合译码之前，所述处理器还用于：
    根据所述第一下行控制信息所在的所述第二频段，确定所述第一频段上的所述第二传输块对应的HARQ进程号为所述第一HARQ进程号。
  20. 根据权利要求19所述的无线装置，其特征在于，包括：
    所述第一频段集合是预定义的，或者，
    所述第一频段集合是高层信令配置的。
  21. 根据权利要求17-20所述的无线装置，其特征在于，包括：
    所述第一下行控制信息还包括所述第一数据包和所述第二数据包的调度信息。
  22. 根据权利要求17或18所述的无线装置，其特征在于，所述收发器用于在第二频段上接收所述第二数据包之前，所述收发器还用于：
    所述收发器还用于，接收第二下行控制信息，所述第二下行控制信息包括所述第一HARQ进程号和所述第一数据包的调度信息以及第一指示信息，所述第一指示信息指示所述第一HARQ进程号为所述第二频段使用的HARQ进程号，其中，
    所述第一下行控制信息还包括所述第二数据包的调度信息。
  23. 根据权利要求22所述的无线装置，其特征在于，所述第一频段和所述第二频段属于第一频段集合，所述第一频段集合包括至少两个频段；
    所述收发器用于接收第一下行控制信息之前，所述收发器还用于：
    所述收发器还用于，通过第一信令接收所述第一频段集合的指示信息和/或所述第二频段的指示信息，其中，所述至少两个频段中除所述第二频段之外的频段能够使用所述第二频段上的传输块对应的HARQ进程号。
  24. 根据权利要求23所述的无线装置，其特征在于，包括：
    第一信令为高层信令。
  25. 一种网络设备，其特征在于，包括：
    处理器和与所述处理器耦合的存储器和收发器；其中，
    所述收发器用于，发送第一下行控制信息，所述第一下行控制信息包括第一混合 自动重传请求HARQ进程号；
    所述收发器还用于，在第一频段上发送承载第一传输块的第一数据包，在第二频段上发送承载第二传输块的第二数据包，其中，所述第一HARQ进程号对应所述第一频段上的所述第一传输块和所述第二频段上的所述第二传输块，以及
    所述第一传输块和所述第二传输相同。
  26. 根据权利要求25所述的网络设备，其特征在于，
    所述收发器还用于，在发送所述第一传输块和所述第二传输块对应的确认反馈信息之前，在所述第一频段上发送承载第三传输块的第三数据包，其中，所述第三传输块对应所述第一HARQ进程号，所述第三传输块与所述第一传输块不同。
  27. 根据权利要求25或26所述的网络设备，其特征在于，
    所述第一频段和所述第二频段属于第一频段集合，所述第一频段集合包括至少两个频段；
    所述收发器用于，发送第一下行控制信息给所述终端设备，包括：
    所述收发器用于，在所述第二频段上给所述终端设备发送所述第一下行控制信息，所述第二频段上的传输块对应的HARQ进程号能够被所述至少两个频段中除所述第二频段之外的其他频段使用。
  28. 根据权利要求27所述的网络设备，其特征在于，
    所述第一频段集合是预定义的，或者，
    所述第一频段集合是高层信令配置的。
  29. 根据权利要求25-28任一项所述的网络设备，其特征在于，
    所述第一下行控制信息还包括所述第一数据包以及所述第二数据包的调度信息。
  30. 根据权利要求25或26所述的网络设备，其特征在于，所述收发器用于在第二频段上发送所述第二数据包之前，所述收发器还用于：
    所述收发器还用于，发送第二下行控制信息，所述第二下行控制信息包括所述第一HARQ进程号和所述第一数据包的调度信息以及第一指示信息，所述第一指示信息指示所述第一HARQ进程号为所述第二频段使用的HARQ进程号，其中，
    所述第一下行控制信息还包括所述第二数据包的调度信息。
  31. 根据权利要求30所述的网络设备，其特征在于，所述收发器用于发送第一下行控制信息之前，还包括：
    所述收发器用于，通过第一信令发送所述第一频段集合的指示信息以及所述第二频段的指示信息，其中，所述至少两个频段中除所述第二频段之外的频段能够使用所述第二频段上的传输块对应的HARQ进程号。
  32. 根据权利要求31所述的网络设备，其特征在于，包括：
    第一信令为高层信令。
  33. 一种包含指令的计算机存储介质，当其在计算机上运行时，使得计算机执行所述权利要求1-16中任一项所述的方法。
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