WO2019110011A1 - 一种资源配置方法和装置 - Google Patents

一种资源配置方法和装置 Download PDF

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Publication number
WO2019110011A1
WO2019110011A1 PCT/CN2018/119843 CN2018119843W WO2019110011A1 WO 2019110011 A1 WO2019110011 A1 WO 2019110011A1 CN 2018119843 W CN2018119843 W CN 2018119843W WO 2019110011 A1 WO2019110011 A1 WO 2019110011A1
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WO
WIPO (PCT)
Prior art keywords
symbols
backhaul
information
transmission
symbol
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/119843
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English (en)
French (fr)
Inventor
吴丹
陈磊
邱晶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to BR112020011369-7A priority Critical patent/BR112020011369A2/pt
Priority to EP18885955.7A priority patent/EP3716500A4/en
Publication of WO2019110011A1 publication Critical patent/WO2019110011A1/zh
Priority to US16/894,077 priority patent/US20200304255A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a resource configuration method and apparatus.
  • the relay technology in a nutshell, is that when the downlink transmission is performed, the signal that the base station needs to send to the terminal is not directly sent to the UE, but is first sent to a relay node (RN), and then forwarded by the relay node.
  • RN relay node
  • the relay node needs to add some new connection links.
  • the different connection links according to the link service object can be classified into the following three types: an access (AC) link, a direct link, and a backhaul (BH) link.
  • the direct link is used for the base station to communicate with nearby terminals
  • the access link is used for the relay node to communicate with the terminal served by the relay node
  • the backhaul link is used for communication between the relay node and the base station.
  • the receiving node receiving data from the base station may be regarded as a BH downlink transmission
  • the relay node transmitting data to the base station may be regarded as a BH uplink transmission.
  • BH uplink transmission and BH downlink transmission can be collectively referred to as BH transmission.
  • the relay node transmitting data to the terminal may be regarded as an AC downlink transmission, and the relay node receiving data from the terminal may be regarded as an AC uplink transmission.
  • AC uplink transmission and AC downlink transmission can be collectively referred to as AC transmission.
  • the relay node when it is switched from the AC downlink transmission to the BH downlink transmission, it is equivalent to the relay node switching from the transmission data to the reception data. Similarly, when the relay node is switched from the AC uplink transmission to the BH uplink transmission, it is equivalent to the relay node switching from the received data to the transmission data. Therefore, it is necessary to consider how to reserve the time resource for the relay node to perform the switching.
  • the embodiment of the present application provides a resource configuration method and apparatus.
  • the method and the device can adapt to the situation that the available resources of the backhaul transmission change, and improve the utilization rate of the backhaul transmission resources.
  • an embodiment of the present application provides a resource configuration method.
  • the method includes: the first device sends a first message to the second device, where the first message carries the information of the available symbols transmitted by the backhaul; the first device receives the second message from the second device, where the second message is used to indicate the first Information about the symbol occupied by the device for backhaul transmission.
  • the information of the available symbols includes one or more of the following: the number of available symbols, the number of available symbols, the number of unavailable symbols, the number of unavailable symbols, the propagation delay of the backhaul link, and the transmission and reception switching time of the first device.
  • the number of available symbols or the number of unavailable symbols may be determined by a symbol time length, a propagation delay of the backhaul link, and a transmission and reception switching time of the first device.
  • the number n of unavailable symbols is n satisfying nT-T p ⁇ T Rx/Tx , and n is smaller than m.
  • T represents the length of time of a symbol
  • T p represents the propagation delay of the backhaul transmission
  • T Rx/Tx represents the transmission and reception switching time of the first device
  • m is the total number of symbols of the time slot in which the backhaul transmission is located.
  • the number n of unavailable symbols is n satisfying nT ⁇ T Rx/Tx , and n is smaller than m.
  • T represents the length of time of one symbol
  • T Rx/Tx represents the switching time of the first device
  • m is the total number of symbols of the time slot in which the backhaul transmission is located.
  • the first device When the first device sends the first message to the second device, it generally carries the minimum number of unavailable symbols or the maximum number of available symbols.
  • the second device When transmitting the second message to the first device, the second device may use 1 bit to indicate whether the first device performs backhaul transmission according to the minimum unavailable symbol number or the maximum available symbol number.
  • an embodiment of the present application provides a resource configuration method.
  • the method includes: receiving, by the second device, a first message from the first device, where the first message carries information of available symbols transmitted by the backhaul; and the second device sends a second message to the first device, where the second message is used to indicate A device performs information on the symbols occupied by the backhaul transmission.
  • the information of the available symbols includes one or more of the following: the number of available symbols, the number of available symbols, the number of unavailable symbols, the number of unavailable symbols, the propagation delay of the backhaul link, and the transmission and reception switching time of the first device.
  • the embodiment of the present application provides a first device for resource configuration.
  • the first device includes: a sending unit, configured to send a first message to the second device, where the first message carries information of available symbols for backhaul transmission; and a receiving unit, configured to receive a second message from the second device, the second The message is used to indicate information of the symbol occupied by the first device for backhaul transmission.
  • the information of the available symbols includes one or more of the following: the number of available symbols, the number of available symbols, the number of unavailable symbols, the number of unavailable symbols, the propagation delay of the backhaul link, and the transmission and reception switching time of the first device.
  • the embodiment of the present application provides a second device for resource configuration.
  • the second device includes: a receiving unit, configured to receive, by the first device, a first message, where the first message carries information of available symbols for backhaul transmission, and a sending unit, configured to send a second message to the first device, where the second device
  • the message is used to indicate information about the symbol occupied by the first device for backhaul transmission.
  • the information of the available symbols includes one or more of the following: the number of available symbols, the number of available symbols, the number of unavailable symbols, the number of unavailable symbols, the propagation delay of the backhaul link, and the transmission and reception switching time of the first device.
  • the number of available symbols or the number of unavailable symbols may be transmitted by the symbol time length, the propagation delay of the backhaul link, and the first device. Switch the time to determine. Specifically, when the frame structure is synchronized between the first device and the second device, the number n of unavailable symbols is n satisfying nT-T p ⁇ T Rx/Tx , and n is smaller than m.
  • T represents the length of time of a symbol
  • T p represents the propagation delay of the backhaul transmission
  • T Rx/Tx represents the transmission and reception switching time of the first device
  • m is the total number of symbols of the time slot in which the backhaul transmission is located.
  • the number n of unavailable symbols is n satisfying nT ⁇ T Rx/Tx , and n is smaller than m.
  • T represents the length of time of one symbol
  • T Rx/Tx represents the switching time of the first device
  • m is the total number of symbols of the time slot in which the backhaul transmission is located.
  • the first device sends the first message to the second device, it generally carries the minimum number of unavailable symbols or the maximum number of available symbols.
  • the second device may use 1 bit to indicate whether the first device performs backhaul transmission according to the minimum unavailable symbol number or the maximum available symbol number.
  • an embodiment of the present application provides a resource configuration method.
  • the method includes: the second device generates a configuration message, where the configuration message carries information about a symbol used by the first device to perform backhaul transmission, and the information of the symbol occupied by the backhaul transmission is transmitted by the second device according to the numerology information and the backhaul. Corresponding relationship between the information of the available symbols and the numerology information of the first device; the second device sends a configuration message to the first device.
  • an embodiment of the present application provides a resource configuration method.
  • the method includes: receiving, by the first device, the configuration message from the second device, where the configuration message carries information about a symbol used for backhaul transmission by the first device, where the information of the occupied symbol for the backhaul transmission is the second device according to the numerology Corresponding relationship between the information and the information of the available symbols of the backhaul transmission and the numerology information of the first device; the first device performs backhaul transmission according to the configuration message.
  • the embodiment of the present application provides a first device.
  • the first device includes: a receiving unit, configured to receive, by the second device, the configuration message, where the configuration message carries information about a symbol used by the first device to perform backhaul transmission, where the information of the symbol occupied by the backhaul transmission is the first.
  • the two devices are obtained according to the correspondence between the numerology information and the information of the available symbols transmitted by the backhaul and the numerology information of the first device; and the processing unit is configured to perform backhaul transmission according to the configuration message.
  • an embodiment of the present application provides a second device.
  • the second device includes: a processing unit, configured to generate a configuration message, where the configuration message carries information about a symbol used for backhaul transmission by the first device, where the information of the occupied symbol for the backhaul transmission is the second device according to the numerology information Corresponding relationship between the information of the available symbols transmitted by the backhaul and the numerology information of the first device; the sending unit, configured to send the configuration message to the first device.
  • the information for performing the backhaul transmission occupied symbol includes a symbol number or a symbol number for performing backhaul transmission.
  • the numerology information includes one or more of the following parameter information: subcarrier spacing, cyclic prefix (CP), time unit, bandwidth, and the like.
  • the information of the available symbols includes one or more of the following: the number of available symbols, the number of available symbols, the number of unavailable symbols, the number of unavailable symbols, the propagation delay of the backhaul link, and the switching time of the first device.
  • the correspondence between the numerology information and the information of the available symbols of the backhaul transmission may be predefined. The correspondence may pre-exist in the second device and the first device.
  • the correspondence between the numerology information and the information of the available symbols of the backhaul transmission may be a predefined correspondence table between the subcarrier spacing and the available symbol number.
  • the second device can learn the number of available symbols of the first device according to the subcarrier spacing configured for the first device and the predefined correspondence table. The number of symbols or symbol number that the second device performs backhaul transmission for the first device configuration according to the number of available symbols.
  • the second device may send configuration information of the subcarrier spacing to the first device, and the first device may also obtain the number of available symbols according to the predefined correspondence table.
  • the second device does not need to configure the symbol number or symbol number of the backhaul transmission for the first device. That is, the second device implicitly notifies the first device of the symbol number or symbol number of the backhaul transmission by the subcarrier spacing information.
  • the method further includes: the second device receiving the information of the backhaul link reported by the first device; and the second device determining, according to the backhaul link information, a correspondence between the numerology information and the number of available symbols of the backhaul transmission. For example, when the propagation delay of the backhaul link is within a certain interval, it corresponds to a predefined correspondence table. Thereby, a predefined correspondence table can be determined according to the propagation delay of the backhaul link.
  • the updating method includes the second device configuring a new correspondence for the first device by using signaling such as RRC, MAC layer CE, or downlink control information (DCI). For example, in a plurality of predefined correspondences, the second device uses the RRC signaling, the MAC layer CE, or the DCI to notify the first device which specific relationship is adopted.
  • signaling such as RRC, MAC layer CE, or downlink control information (DCI).
  • DCI downlink control information
  • an embodiment of the present invention provides a device, where the device includes a transceiver and a processor.
  • the memory is coupled to the processor.
  • the transceiver performs reception and/or transmission of a message.
  • the processor runs the code in the memory such that the device performs the method of any of the first, second, fifth or sixth aspect.
  • an embodiment of the present invention provides a readable storage medium, where the readable storage medium stores instructions, when the instructions stored in the readable storage medium are run on a device, causing the device to perform the first
  • an embodiment of the invention provides a computer program product, when the computer program product is run on a computer, causing the computer to perform any of the first aspect, the second aspect, the fifth aspect, or the sixth aspect The method described in the item.
  • an embodiment of the present invention provides a chip, where the chip includes a communication interface and a processor.
  • the communication interface performs reception and/or transmission of a message.
  • the processor executes code in a memory such that the chip performs the method of any of the first aspect, the second aspect, the fifth aspect, or the sixth aspect.
  • the second device may be a previous hop device, a higher-level node, or an upstream node of the first device on the link from the base station to the terminal.
  • the first device includes a first relay node
  • the second device includes a base station.
  • the first device includes a second relay node
  • the second device includes a third relay node.
  • the third relay node is the last hop device of the second relay node.
  • the first device may be a relay node of the same level
  • the second device may be a relay node of the upper level of the relay node of the level.
  • the upper-level relay node configures the local-level relay by receiving information of available symbols (or obtaining information of available symbols according to a predefined correspondence) and transmitting information indicating a symbol used by the relay node of the current level for backhaul transmission.
  • the backhaul transmission of the node In the scenario of the multi-hop relay, the method provided by the embodiment of the present application may be adopted between the base station and the first relay node, or between the upper-level relay node and the current-level relay node. Because the upper-level relay node can be a base station functioning as a relay, the upper-level relay node can configure the current-level relay node according to the received information of the available symbols.
  • the first device may notify the second device of the available symbol information, so that the second device can perform better configuration in the available or unavailable symbols, so that the relay can be adapted.
  • the situation in which the available resources of the backhaul transmission such as the node connection handover, the mobile, and the different subcarrier intervals are changed, and the utilization of the backhaul transmission resource is provided.
  • FIG. 1 is a schematic structural diagram of a wireless communication system to which an embodiment of the present application is applied;
  • FIG. 2 is a resource configuration method according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of a frame structure of a base station and a relay node in a BH downlink transmission scenario
  • FIG. 4 is a schematic diagram of a frame structure of a base station and a relay node in a BH downlink transmission scenario
  • FIG. 5 is a schematic diagram of a frame structure of a base station and a relay node in a BH uplink transmission scenario
  • FIG. 6 is a schematic diagram of downlink transmission of a frame structure of a base station and a relay node
  • FIG. 7 is a schematic diagram of an uplink transmission of a frame structure of a base station and a relay node
  • FIG. 8 is a schematic diagram of a frame structure of BH downlink transmission under different subcarrier intervals
  • FIG. 9 is a schematic diagram of a resource configuration method according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a first device according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of a possible logical structure of a first device according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a second device according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram of a possible logical structure of a second device according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic structural diagram of a wireless communication system to which an embodiment of the present application is applied.
  • the wireless communication system includes a base station, a relay node, and a terminal.
  • the terminal can connect to the base station in a wireless manner and perform data transmission with the base station.
  • the terminal can also connect to the relay node wirelessly and perform data transmission with the relay node.
  • FIG. 1 is only a schematic diagram, and the communication system may further include other network devices, such as more base stations, more relay nodes, and more terminals.
  • the base station in the embodiment of the present application is an access device that is accessed by the terminal to the wireless communication system by using a wireless device, and may be a base station, an evolved base station, a base station in a next-generation communication system, or an access node in a WiFi system.
  • the relay node in this embodiment of the present application may be a base station or a micro base station. The relay node can operate in the low frequency band or in the high frequency band.
  • the terminal in the embodiment of the present application may also be referred to as a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), and the like.
  • the terminal can be a mobile phone, a tablet, a computer with wireless transceiver function, and other terminals with wireless transceiver functions.
  • the typical switching time of the relay node may be 8us, and the subcarrier spacing is 120KHz, and the symbol length is about 8.9us.
  • the symbol may be an Orthogonal Frequency-Division Multiplexing (OFDM) symbol.
  • OFDM Orthogonal Frequency-Division Multiplexing
  • ISD inter-site distance
  • the node 1 is connected to the relay station 1, the base station 1 and the relay node is a physical distance close to 1, the smaller propagation delay of the backhaul link.
  • the relay node 1 switches to the base station 2, the physical distance between the base station 2 and the relay node 1 is relatively long, and the propagation delay of the backhaul link is large.
  • the transmission and reception switching time in the embodiment of the present application may also be referred to as a transmission and reception transition time.
  • the sending and receiving switching time may specifically include a switching time from the received transmission and/or a switching time from the sending to the receiving.
  • the frame structure synchronization of the base station and the relay node means that when the base station and the relay node communicate, the frames transmitted between the two are time-aligned.
  • the frame structure of the base station and the relay node means that when the base station and the relay node communicate, the frames transmitted between the two are time-aligned.
  • subcarrier spacings for example, 15 kHz to 480 kHz
  • symbol lengths corresponding to different subcarrier spacings are different, so the same transmission and reception switching time needs to be reserved (or vacant, the same below).
  • the number of symbols is also different, so that the number of symbols used for transceiving switching may also vary.
  • FIG. 2 is a resource configuration method according to an embodiment of the present application.
  • the second device may be a previous hop device, a higher level node, or an upstream node of the first device on the link from the base station to the terminal.
  • the first device includes a first relay node, and the second device includes a base station.
  • the first device includes a second relay node, and the second device includes a third relay node.
  • the third relay node is the last hop device of the second relay node.
  • the first device may be a relay node of the same level
  • the second device may be a relay node of the upper level of the relay node of the level.
  • the method provided by the embodiment of the present application may be adopted between the base station and the first relay node, or between the upper-level relay node and the current-level relay node.
  • the first device may be the relay node 1 in FIG. 1, and the second device may be the base station 1 in FIG.
  • the first device may be the relay node 1 in FIG. 1, and the second device may be the relay node 2 in FIG.
  • the method includes the following steps.
  • Step 201 The first device sends a first message to the second device, where the first message carries information about available symbols of the backhaul transmission.
  • the information of the available symbols includes one or more of the following: the number of available symbols, the number of available symbols, the number of unavailable symbols, the number of unavailable symbols, the propagation delay of the backhaul link, and the switching time of the first device.
  • the number of available symbols can be determined by the number of unavailable symbols and the total number of symbols of the time slot in which the backhaul transmission is located. In the case where the total number of symbols of the slot in which the backhaul transmission is located is known, the number of available symbols is equal to the total number of symbols of the slot in which the backhaul transmission is located minus the number of unavailable symbols. Similarly, the number of unavailable symbols can be obtained from the number of available symbols.
  • the number of available symbols can be determined by all symbols of the time slot in which the backhaul transmission is located and the number of unavailable symbols.
  • the number of unavailable symbols can be determined by all symbols of the time slot in which the backhaul is transmitted and the number of available symbols.
  • the first device can also report the transmission and reception switching time and the propagation delay of the backhaul link, and then the second device combines the symbol time length to calculate the number of available symbols for the backhaul transmission. Therefore, the number of available symbols for the backhaul transmission can be determined according to the symbol time length, the propagation delay of the backhaul link, and the transmission and reception switching time of the first device.
  • the number of unavailable symbols or the number of available symbols that satisfy the condition may be plural.
  • the smallest value among the number of unavailable symbols is called the minimum number of unavailable symbols.
  • the largest value among the number of available symbols is called the maximum number of available symbols.
  • the second device receives the first message from the first device.
  • the second device may configure, for the first device, a symbol number or a symbol number for backhaul transmission according to the received first message. For example, the second device configures the first device to perform backhaul transmission on the available symbols indicated by the first message. Alternatively, the second device determines a symbol that does not perform backhaul transmission according to the number of available symbols reported by the first device. The symbol that does not perform backhaul transmission cannot be a symbol that should transmit BH control information. In addition, when determining which symbols are not for backhaul transmission, the impact on AC transmission should be considered as small as possible. In order to ensure resource utilization, the symbol for the specific backhaul transmission can also be determined according to the maximum number of available symbols.
  • the second device may send the information of the symbol occupied by the backhaul of the first device to the first device by using the second message.
  • the information of the available symbols is the number of available symbols.
  • the number of available symbols includes the starting symbol number of the available symbols and/or the ending symbol number of the available symbols.
  • the number may be an index configured by the second device for the first device.
  • the configuration bits corresponding to the start symbol number and the end symbol number can be obtained by encoding the start symbol number and the end symbol number.
  • a correspondence table known to both the second device and the first device may be defined in advance.
  • the first device can directly report the configuration bit when reporting the available symbol number.
  • the second device can obtain the number of available symbols according to the correspondence table.
  • Table 1 is a correspondence table of a configuration bit and a start symbol number and an end symbol number.
  • the numbers of the four available symbols can be configured.
  • the specific starting symbol number and ending symbol number in Table 1 may be other values. It is also possible to increase the number of configuration bits to indicate more of the start symbol number and the end symbol number.
  • Table 1 Correspondence table of a configuration bit and a start symbol number and an end symbol number
  • the first device may utilize radio resource control (RRC) signaling, a control element (CE) of a media access control (MAC) layer, and uplink control information (UCI). Etc. as the first message carries the number of available symbols or the number of available symbols.
  • RRC radio resource control
  • CE control element
  • UCI uplink control information
  • Step 202 The first device receives a second message from the second device, where the second message is used to instruct the first device to perform backhaul transmission of information occupied by the symbol.
  • the information of the symbols occupied by the backhaul transmission includes the number of symbols or symbol numbers for performing backhaul transmission.
  • the second device may send a configuration bit similar to Table 1 to indicate the start symbol number and the end symbol number of the symbol occupied by the backhaul transmission.
  • the second message may be RRC signaling, MAC layer CE, or the like.
  • the first device performs backhaul transmission on the corresponding symbol according to the indication of the second message.
  • the RRC signaling and the MAC layer CE in the embodiment of the present application may be triggered by the network side or the terminal side. Generally speaking it can be sent aperiodically. Of course, it can also be sent periodically.
  • the first device is used as the first relay node
  • the second device is used as the base station as an example for description.
  • the case where the first device is the second relay node and the second device is the third relay node can be similarly obtained, and details are not described herein again.
  • the first relay node is referred to as a relay node in a particular embodiment.
  • the first message sent by the relay node to the base station carries the maximum number of available symbols. Therefore, the following embodiments mainly describe the information of the available symbols as the maximum number of available symbols, and the information of other available symbols can be similarly obtained, and therefore will not be described again.
  • the relay node may report the maximum number of available symbols of the BH downlink transmission to the base station by using the first message.
  • the base station sends a second message to the relay node to configure the symbol number or symbol number of the relay node to perform BH downlink transmission.
  • FIG. 3 is a schematic diagram of a frame structure of a base station and a relay node in a BH downlink transmission scenario.
  • "AC DL” and "BH DL” indicate AC downlink transmission and BH downlink transmission, respectively.
  • a small square in Figure 3 represents a symbol. The number in the small square indicates the number of the symbol in its time slot. There are three consecutive time slots in Figure 3, each with 14 symbols. The number of symbols in each time slot may be more or less, which is not limited in this application.
  • an uplink symbol and/or a downlink symbol may be dynamically configured in one time slot.
  • the resource configuration method provided by the present application may also be used to reserve time resources for transmitting and receiving handovers.
  • the time slot in the embodiment of the present application can also be understood as a resource for a period of time.
  • the time slot in which the backhaul transmission or the backhaul transmission is located refers to a time resource used for backhaul transmission.
  • the relay node performs AC downlink transmission in the first time slot and the third time slot, and performs BH downlink transmission in the second time slot, so in the first time slot and The transceiver switching time needs to be reserved between the second time slot and between the second time slot and the third time slot.
  • T represents the time length of one symbol
  • T p represents the propagation delay of downlink transmission BH.
  • the base station connected to the relay node is a base station 1, at this time the propagation delay is small. If the time TT p is sufficient for the switching of the relay node, the relay node only needs to reserve the last symbol when performing the BH downlink transmission.
  • the relay node switches to connect to the base station 2. At this time, the propagation delay is large, and the TT p is not enough for the relay node to transmit and receive the handover. Therefore, the BH downlink transmission needs to reserve 2 symbols to ensure 2T-T. p is sufficient for the switching of the relay node. And so on.
  • the maximum number of available symbols or the symbolic number of the BH downlink transmission is reported.
  • the maximum number of available symbols can be determined by the following method. Assume that the total number of symbols in the time slot in which the BH downlink transmission is located is m, and the switching time of the relay node is T Rx/Tx , and the value that satisfies the minimum value of nT-T p ⁇ T Rx/Tx is the symbol that needs to be reserved. number.
  • the base station generally configures the symbol that the relay node reserves the tail of its time slot. Mn is the maximum number of symbols available for this time slot.
  • T p is not enough as a relay node sending / receiving switch may reserve a first downlink transmission BH symbol or the last symbol of a slot.
  • the relay node time t 1 in Figure 3 is the last symbol in the first slot may be reserved for transmitting and receiving switching.
  • TA uplink timing advance
  • the relay node calculates the propagation delay of the BH downlink transmission according to the downlink synchronization and the whole network timing, and combines the transmission and reception switching time of the relay node to obtain the number of symbols that need to be reserved (or vacant), so the relay node Reporting is the best option.
  • FIG. 4 is a schematic diagram of a frame structure of a base station and a relay node in a BH downlink transmission scenario.
  • the BH downlink transmission is followed by the AC uplink transmission.
  • the “DL/UL gap” indicates the timing advance of the uplink transmission with respect to the downlink transmission.
  • the DL/UL gap can be considered as the timing advance of the time slot for performing AC uplink transmission in FIG. 4 with respect to the third time slot in FIG. 3 (AC downlink transmission is performed for the time slot). Since the timing advance of "DL/UL gap" will occupy a part of several symbols reserved by the base station in FIG. 3, the remaining time resources may not be sufficient for the transmission and reception switching of the base station.
  • the base station needs to determine whether the remaining time resources are sufficient to complete the transmission/reception handover or the transmission handover of the base station. If not, one or more BH downlink transmission symbols or AC uplink transmission symbols need to be reserved. For example, the symbol 12 of the BH downlink transmission in FIG. 4 is also reserved for transceiving handover.
  • the relay node may report the maximum number of available symbols of the BH uplink transmission to the base station by using the first message.
  • the base station sends a second message to the relay node to configure the symbol number or symbol number of the relay node to perform BH uplink transmission.
  • FIG. 5 is a schematic diagram of a frame structure of a base station and a relay node in a BH uplink transmission scenario.
  • "AC UL" and "BH UL” respectively indicate AC uplink transmission and BH uplink transmission.
  • the method of determining the maximum number of available symbols for BH uplink transmission is similar to that of BH downlink transmission.
  • the base station generally configures the symbol of the head of the slot where the relay node reserves the BH uplink transmission. The reason is that the tail symbol of the BH uplink transmission slot is generally used for the transmission of the uplink control channel or the uplink reference signal, and it is better to ensure normal transmission.
  • the symbol number of the relay node is generally based on the base station number, so the symbol number of the relay node that is destroyed and actually transmitted is also determined according to the numbering rule of the base station.
  • the relay node may report the maximum number of available symbols for the backhaul transmission to the base station by using the first message.
  • the base station sends a second message to the relay node to configure the symbol number or symbol number of the relay node for backhaul transmission.
  • the maximum number of available symbols for backhaul transmission can be determined as follows. For the BH uplink transmission or the BH downlink transmission, it is assumed that the transmission and reception switching time of the relay node is T Rx/Tx , and the transmission and reception switching time may specifically include the transmission/reception switching time T Rx ⁇ Tx and the transmission/reception switching time T Tx ⁇ Rx. .
  • nT ⁇ T Rx/Tx The minimum value of n that satisfies nT ⁇ T Rx/Tx is the number of symbols to be reserved, and mn is the maximum number of symbols available for the time slot. It should be noted that the location or number of the reserved symbols is determined according to the asynchronous timing relationship between the base station and the relay node and the switching time of the relay node, and may include several symbols of the head or/and the tail of the time slot in which the backhaul transmission is located. . In addition, for the case where the relay node has only the transmission/reception switching, it is still possible to obtain n according to nT ⁇ T Rx ⁇ Tx . At this time, T Tx ⁇ Rx can be considered to be zero.
  • T Rx ⁇ Tx can be considered to be zero.
  • the base station After receiving the maximum number of available symbols reported by the relay node, the base station needs to determine whether the reserved symbols can meet the requirements for base station transceiving handover (similar to the case of FIG. 4). If not, you need to reserve one or more BH or AC symbols and then decide on the number of symbols or symbol numbers available for the backhaul transmission.
  • FIG. 6 is a schematic diagram of downlink transmission of a frame structure of a base station and a relay node.
  • FIG. 7 is a schematic diagram of an uplink transmission of a frame structure of a base station and a relay node.
  • the minimum n that satisfies nT ⁇ T Rx/Tx is the number of symbols that need to be reserved, thereby obtaining the number of symbols that need to be reserved in the case where the frame structure is asynchronous.
  • the value of n obtained is set to 2 as shown in FIG. 6 and FIG. 7, the first symbol and the last symbol of the slot in which the backhaul transmission is located are reserved for transmission and reception switching of the relay node.
  • the AC downlink transmission of the relay node has a fixed delay T D relative to the AC downlink transmission of the base station.
  • the AC uplink transmission of the relay node has a fixed timing advance T A relative to the base station AC uplink transmission.
  • the fixed delay T D and the fixed timing advance T A may be predefined, and there is no necessary connection between T D and T A and the propagation delay of the backhaul link and the number of reserved symbols for backhaul transmission. In general, by controlling the range of values of T D and T A , the minimum number of reserved symbols n is not affected. However, if the values of T D and T A exceed a certain range, it is necessary to increase the number of reserved symbols.
  • the smallest n satisfying nT ⁇ T Rx/Tx is not the number of symbols finally reserved, and the number of symbols finally reserved needs to be further increased by one or more symbols on the basis of n.
  • the added one or more symbols can generally be at the head or tail of the time slot in which the backhaul is transmitted. That is, one or more symbols are reserved in the head or tail of the slot in which the backhaul transmission is located.
  • the maximum available number of symbols can also be determined by predefining the correspondence between the maximum available symbol number and the subcarrier spacing (or other numerology).
  • numerology is a parameter used by the communication system.
  • Communication systems (such as 5G) can support a variety of numerologies.
  • Numerology can be defined by one or more of the following parameter information: subcarrier spacing, cyclic prefix (CP), time unit, bandwidth, and so on.
  • numerology can be defined by subcarrier spacing and CP.
  • the subcarrier spacing may be 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, 480 kHz, and the like.
  • the CP information may include a CP length and/or a CP type.
  • the bandwidth can be a contiguous resource in the frequency domain.
  • FIG. 8 is a schematic diagram of a frame structure of BH downlink transmission under different subcarrier intervals. It is assumed that the number of symbols transmitted by the BH downlink in one slot is 14, the handover time of the relay node is 8 us, and the propagation delay of the BH downlink transmission is 1 us.
  • the three subcarrier spacings are 120KHz, 240KHz, and 480KHz, respectively, and the symbol lengths corresponding to the three subcarrier spacings are 8.92us, 4.46us, and 2.23us, respectively.
  • n which satisfies the minimum value of nT-T p ⁇ T Rx / Tx is 2, 3, and 5, respectively.
  • the number of symbols that need to be reserved is 2, 3, and 5, respectively.
  • the maximum number of available symbols is 12, 11, and 9.
  • the number of symbols transmitted by the BH downlink in one slot is other numbers, the maximum number of available symbols of the slot can be similarly obtained.
  • the number of symbols for BH downlink transmission in the time slot may be 7.
  • the maximum number of available symbols can be obtained as shown in Table 3.
  • the maximum available number of symbols and the subcarrier spacing (or other numerology) can be obtained. Correspondence relationship.
  • the maximum number of available symbols and the subcarrier spacing may be obtained by referring to the method provided above, and details are not described herein again.
  • the reserved number of symbols or the maximum number of available symbols corresponding to each subcarrier spacing may be obtained by referring to the method provided above, and details are not described herein again.
  • Subcarrier spacing 120K 240K 480K Maximum number of symbols available for backhaul transmission 12 11 9
  • Subcarrier spacing 120K 240K 480K Maximum number of symbols available for backhaul transmission 5 4 2
  • FIG. 9 is a schematic diagram of a resource configuration method according to an embodiment of the present application. The method includes the following steps.
  • Step 901 The base station generates a configuration message, where the configuration message carries information about a symbol used by the relay node to perform backhaul transmission, and the information of the symbol occupied by the backhaul transmission is information of the available symbols transmitted by the base station according to the numerology information and the backhaul. Correspondence between the correspondence and the numerology information of the relay node.
  • the correspondence between the numerology information and the information of the available symbols of the backhaul transmission may be a correspondence table between the subcarrier spacing and the number of available symbols or the number of unavailable symbols of the backhaul transmission.
  • the correspondence between the numerology information and the information of the available symbols of the backhaul transmission is a correspondence table between the subcarrier spacing and the maximum number of available symbols of the backhaul transmission.
  • the subcarrier spacing in Table 2 or 3 can be replaced with other numerology information, such as cyclic prefix, time unit, bandwidth.
  • the maximum number of available symbols for backhaul transmissions may also be replaced with information for other available symbols, such as the number of available symbols, the number of unavailable symbols, the propagation delay of the backhaul link, and the switching time of the relay node.
  • Step 902 The base station sends a configuration message to the relay node.
  • the relay node receives the configuration message.
  • the relay node performs backhaul transmission according to the configuration message.
  • the base station may implicitly notify the relay node of the maximum number of available symbols for backhaul transmission through the subcarrier interval based on the correspondence between the maximum number of available symbols of the backhaul transmission and the subcarrier spacing (or other numerology). Specifically, the base station may send configuration information of the subcarrier spacing to the relay node, and the relay node may also obtain the maximum number of available symbols according to the predefined correspondence table. If the relay node performs backhaul transmission by default according to the symbol determined by the maximum number of available symbols, the base station does not need to configure the symbol number or symbol number of the backhaul transmission for the relay node. When the relay node moves or the connection is switched, the foregoing correspondence needs to be updated.
  • the update method includes the base station configuring a new correspondence relationship for the relay node by using signaling such as RRC, MAC layer CE, or downlink control information (DCI).
  • signaling such as RRC, MAC layer CE, or downlink control information (DCI).
  • the base station uses the RRC signaling, the MAC layer CE, or the DCI to notify the relay node which specific relationship is adopted.
  • the plurality of predefined correspondence tables are mainly related to information such as propagation delay of the backhaul link.
  • the method further includes: the base station receiving the information of the backhaul link reported by the relay node; and the base station determining, according to the backhaul link information, a correspondence between the numerology information and the maximum number of available symbols of the backhaul transmission. For example, when the propagation delay of the backhaul link is within a certain interval, it corresponds to a predefined correspondence table. Thereby, a predefined correspondence table can be determined according to the propagation delay of the backhaul link.
  • the resource configuration method proposed by the embodiment of the present application can adapt to the situation that the available resources of the backhaul transmission such as the relay node connection handover, the mobile, and the different subcarrier intervals change, and provide the utilization rate of the backhaul transmission resource.
  • the embodiment of the present application may divide the function module by using the first device and the second device.
  • each function module may be divided according to each function, or two or more functions may be integrated in the function.
  • a processing module In a processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner.
  • FIG. 10 is a schematic diagram of a possible structure of a first device according to an embodiment of the present disclosure.
  • the first device includes: a sending unit 1001 and a receiving unit 1002.
  • the sending unit 1001 is configured to support a related step of the first device in the method embodiment to send the first message (or the information of the available symbols).
  • the first device performs step 201 in FIG.
  • the receiving unit 1002 is configured to support a related step of the first device receiving the second message (or the configuration of the second device regarding the backhaul transmission).
  • the first device performs step 202 in FIG.
  • the first device further includes: a processing unit 1003, configured to support information about the available symbols of the first device, and related steps about the configuration of the backhaul transmission.
  • the processing unit 1003 may be a processor or a processing circuit, etc.; the sending unit 1001 may be a transmitter or a transmitting circuit, etc., the receiving unit 1002 may be a receiver or a receiving circuit, etc., and the sending unit 1001 and the receiving unit 1002 may be Form a communication interface.
  • FIG. 11 is a schematic diagram of a possible logical structure of a first device provided by an embodiment of the present application.
  • the first device includes a communication interface 1103.
  • the communication interface 1103 is configured to support the first device to communicate.
  • the communication interface 1103 is configured to support a related step of the first device to send the first message, or a related step of supporting the first device to receive the second device.
  • the first device may further include a memory 1101, a bus 1104, and a processor 1102.
  • the processor 1102 and the memory 1101 can be connected to one another via a bus 1104.
  • the processor 1102 can be used to support the first device's information about the available symbols and the related steps regarding the configuration of the backhaul transmission and the like.
  • the memory 1101 is configured to store code and data of the first device.
  • FIG. 12 is a schematic diagram of a possible structure of a second device according to an embodiment of the present disclosure.
  • the second device includes: a receiving unit 1201 and a sending unit 1202.
  • the receiving unit 1201 is configured to support a related step of the second device receiving the first message.
  • the sending unit 1202 is configured to support a related step of the second device sending the second message.
  • the second device may further include a processing unit 1203.
  • the processing unit 1203 is configured to process the information of the available symbols by the second device and/or the related steps of performing the backhaul transmission configuration on the first device.
  • the processing unit 1203 may be a processor or a processing circuit, etc.; the sending unit 1202 may be a transmitter or a transmitting circuit, etc., the receiving unit 1201 may be a receiver or a receiving circuit, etc., and the sending unit 1202 and the receiving unit 1201 may be Form a communication interface.
  • FIG. 13 is a schematic diagram of a possible logical structure of a second device provided by an embodiment of the present application.
  • the second device includes a communication interface 1303.
  • the communication interface 1303 is configured to support communication by the second device.
  • the communication interface 1303 is configured to support the second device to receive the first message and/or send the second message.
  • the second device may further include a memory 1301, a bus 1304, and a processor 1302.
  • the processor 1302 and the memory 1301 are connected to one another via a bus 1304.
  • the memory 1301 is configured to store program codes and data of the second device.
  • the processor 1302 calls the code stored in the memory 1301 for control management.
  • the memory 1301 may or may not be coupled to the processor.
  • the processor 1102 and the processor 1302 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, and a hardware component. Or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
  • the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, combinations of digital signal processors and microprocessors, and the like.
  • the bus 1104 and the bus 1304 may be peripheral component interconnect standard PCI buses or extended industry standard architecture EISA buses and the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIGS. 11 and 13, but it does not mean that there is only one bus or one type of bus.
  • each network element such as the first device, the second device, and the third device, in order to implement the above functions, includes corresponding hardware structures and/or software modules for performing the respective functions.
  • the present application can be implemented in a combination of hardware or hardware and computer software in conjunction with the network elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • a readable storage medium wherein the readable storage medium stores computer execution instructions, when a device (which may be a single chip microcomputer, a chip, etc.) or the processor can invoke the readable storage medium
  • the steps of storing a computer-executable instruction to perform the steps of the first device or the second device in the method provided in FIG. 2 or performing the relay node or base station in the method provided in FIG. 9 are stored therein.
  • the aforementioned readable storage medium may include various media that can store program codes, such as a USB flash drive, a removable hard disk, a read only memory, a random access memory, a magnetic disk, or an optical disk.
  • a computer program product comprising computer executed instructions stored in a computer readable storage medium; at least one processor of the device may be Reading the storage medium to read the computer execution instructions, the at least one processor executing the computer to execute the instructions such that the device implements the steps of the first device or the second device in the method provided in FIG. 2 or performs the method in the method provided in FIG. The steps of a node or base station.
  • a communication system including a plurality of devices including a first device and a second device.
  • the first device may be the first device provided in FIG. 10 or FIG. 11 and used to perform the steps of the first device in the method provided in FIG. 2 or FIG. 9; and/or the second device may be FIG. 12 Or the second device provided in FIG. 13 and used to perform the steps of the second device in the method provided in FIG. 2 or 9.
  • the embodiment of the present application also provides a chip that implements the method described in the above embodiment (for example, FIG. 2 or FIG. 9).
  • the chip includes a processing circuit and a transceiver circuit.
  • the transceiver circuit can be, for example, an input/output interface, a pin or a circuit, or the like.
  • the processing circuit can execute computer executed instructions stored by the memory unit.
  • the chip may also include a memory unit.
  • the storage unit may be a register, a cache, or the like. Of course, it is also possible to provide an additional memory unit for the chip.
  • the storage unit may also be a storage unit located outside the chip in the terminal or the access device, such as a read-only memory (ROM) or other type of static storage device that can store static information and instructions. Random access memory (RAM), etc.
  • the chip can be applied to a base station or a relay node.
  • Yet another aspect of the present application is directed to an apparatus that includes code in the processor running memory such that the apparatus performs the various methods described above.
  • the memory stores code and data.
  • the memory is located in the device, the memory being coupled to the processor.
  • the memory can also be located outside of the device.
  • 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)).

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Abstract

本申请实施例提供了一种资源配置方法。该方法包括：中继节点向基站发送第一消息，该第一消息携带回程传输的可用符号的信息；中继节点从基站接收第二消息，该第二消息用于指示中继节点进行回程传输所占用符号的信息。该可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和第一设备的收发切换时间。针对回程传输，中继节点可以通过第一消息向基站上报BH下行传输的最大可用符号数。基站向中继节点发送第二消息，来配置中继节点进行回程传输的符号数或符号编号。

Description

一种资源配置方法和装置 技术领域
本发明涉及通信技术领域，尤其涉及一种资源配置方法和装置。
背景技术
中继技术，简单的说，就是在下行传输时，基站需要发给终端的信号不直接发给UE，而是先发给一个中继节点(relay node，RN)，然后再由中继节点转发给UE；在上行传输时，UE的上行信号也不直接发给基站，而是先发给一个中继节点，然后再由中继节点转发给基站。
中继节点作为网络中引入的新节点，需要增加一些新的连接链路。在存在中继的基站小区内，根据链路服务对象的不同连接链路可分为以下三种：接入(access，AC)链路、直连链路以及回程(backhaul，BH)链路。直连链路用于基站与附近终端通信，接入链路用于中继节点与中继节点服务的终端相互通信，回程链路用于中继节点与基站间的通信。其中，中继节点从基站接收数据可以认为是BH下行传输，中继节点向基站发送数据可以认为是BH上行传输。BH上行传输和BH下行传输可以统称BH传输。中继节点向终端发送数据可以认为是AC下行传输，中继节点从终端接收数据可以认为是AC上行传输。AC上行传输和AC下行传输可以统称AC传输。
对于中继节点而言，当其由AC下行传输切换为BH下行传输时，相当于该中继节点由发送数据切换为接收数据。类似地，当中继节点由AC上行传输切换为BH上行传输时，相当于该中继节点由接收数据切换为发送数据。因此需要考虑如何预留中继节点进行收发切换的时间资源。
发明内容
本申请实施例提供了一种资源配置方法和装置。通过该方法和装置可以适应回程传输的可用资源发生变化的情况，提高回程传输资源的利用率。
第一方面，本申请实施例提供了一种资源配置方法。该方法包括：第一设备向第二设备发送第一消息，该第一消息携带回程传输的可用符号的信息；第一设备从第二设备接收第二消息，该第二消息用于指示第一设备进行回程传输所占用符号的信息。该可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和第一设备的收发切换时间。
在一种可能的实现方式中，可用符号数或不可用符号数可以由符号时间长度、回程链路的传播时延和第一设备的收发切换时间来确定。具体地，当第一设备和第二设备之间帧结构同步时，不可用符号数n为满足nT-T p≥T Rx/Tx的n，且n小于m。其中T表示一个符号的时间长度，T p表示回程传输的传播时延，T Rx/Tx表示第一设备的收发切换时间，m为回程传输所在时隙的总符号数。可用符号数N＝m-n。当第一设备和第二设备之间帧结构异步时，不可用符号数n为满足nT≥T Rx/Tx的n，且n小于m。其中T表示一个符号的时间长度，T Rx/Tx表示第一设备的收发切换时间，m为回程传输所在时隙的总符号数。可用符号数N＝m-n。需 要说明的是，不论第一设备和第二设备之间帧结构同步还是异步，满足条件的n可能是多个。在多个n中值最小的n称为最小不可用符号数n min。最大可用符号数N max＝m-n min。在第一设备向第二设备发送第一消息时，一般携带最小不可用符号数或者最大可用符号数。第二设备在向第一设备发送第二消息时，可以用1比特来指示第一设备是否根据最小不可用符号数或最大可用符号数进行回程传输。
第二方面，本申请实施例提供了一种资源配置方法。该方法包括：第二设备从第一设备接收第一消息，该第一消息携带回程传输的可用符号的信息；第二设备向第一设备发送第二消息，该第二消息用于指示所第一设备进行回程传输所占用符号的信息。该可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和第一设备的收发切换时间。
第三方面，本申请实施例提供了一种用于资源配置第一设备。该第一设备包括：发送单元，用于向第二设备发送第一消息，该第一消息携带回程传输的可用符号的信息；接收单元，用于从第二设备接收第二消息，该第二消息用于指示第一设备进行回程传输所占用符号的信息。该可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和第一设备的收发切换时间。
第四方面，本申请实施例提供了一种用于资源配置第二设备。该第二设备包括：接收单元，用于从第一设备接收第一消息，该第一消息携带回程传输的可用符号的信息；发送单元，用于向第一设备发送第二消息，该第二消息用于指示所述第一设备进行回程传输所占用符号的信息。该可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和第一设备的收发切换时间。
根据第一方面至第四方面中的任一方面，在一种可能的实现方式中，可用符号数或不可用符号数可以由符号时间长度、回程链路的传播时延和第一设备的收发切换时间来确定。具体地，当第一设备和第二设备之间帧结构同步时，不可用符号数n为满足nT-T p≥T Rx/Tx的n，且n小于m。其中T表示一个符号的时间长度，T p表示回程传输的传播时延，T Rx/Tx表示第一设备的收发切换时间，m为回程传输所在时隙的总符号数。可用符号数N＝m-n。当第一设备和第二设备之间帧结构异步时，不可用符号数n为满足nT≥T Rx/Tx的n，且n小于m。其中T表示一个符号的时间长度，T Rx/Tx表示第一设备的收发切换时间，m为回程传输所在时隙的总符号数。可用符号数N＝m-n。需要说明的是，不论第一设备和第二设备之间帧结构同步还是异步，满足条件的n可能是多个。在多个n中值最小的n称为最小不可用符号数n min。最大可用符号数N max＝m-n min。在第一设备向第二设备发送第一消息时，一般携带最小不可用符号数或者最大可用符号数。第二设备在向第一设备发送第二消息时，可以用1比特来指示第一设备是否根据最小不可用符号数或最大可用符号数进行回程传输。
第五方面，本申请实施例提供了一种资源配置方法。该方法包括：第二设备生成配置消息，该配置消息携带为第一设备配置进行回程传输所占用符号的信息，该进行回程传输所占用符号的信息是该第二设备根据numerology信息与回程传输的可用符号的信息之间的对应关系以及该第一设备的numerology信息得到的；第二设备向第一设备发送配置消息。
第六方面，本申请实施例提供了一种资源配置方法。该方法包括：第一设备从第二设备接收该配置消息，该配置消息携带为第一设备配置进行回程传输所占用符号的信息，该进行回程传输所占用符号的信息是该第二设备根据numerology信息与回程传输的可用符号 的信息之间的对应关系以及该第一设备的numerology信息得到的；第一设备根据该配置消息进行回程传输。
第七方面，本申请实施例提供了一种第一设备。该第一设备包括：接收单元，用于从第二设备接收该配置消息，该配置消息携带为第一设备配置进行回程传输所占用符号的信息，该进行回程传输所占用符号的信息是该第二设备根据numerology信息与回程传输的可用符号的信息之间的对应关系以及该第一设备的numerology信息得到的；处理单元，用于根据该配置消息进行回程传输。
第八方面，本申请实施例提供了一种第二设备。该第二设备包括：处理单元，用于生成配置消息，该配置消息携带为第一设备配置进行回程传输所占用符号的信息，该进行回程传输所占用符号的信息是该第二设备根据numerology信息与回程传输的可用符号的信息之间的对应关系以及该第一设备的numerology信息得到的；发送单元，用于向第一设备发送配置消息。
在第五方面至第八方面的任一方面中，进行回程传输所占用符号的信息包括进行回程传输的符号数或符号编号。numerology信息包括以下参数信息中的一个或多个：子载波间隔，循环前缀(cyclic prefix,CP)，时间单位，带宽等。可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和第一设备的收发切换时间。numerology信息与回程传输的可用符号的信息之间的对应关系可以是预定义的。该对应关系可以预存在第二设备和第一设备。以numerology信息为子载波间隔、可用符号的信息为可用符号数为例，numerology信息与回程传输的可用符号的信息之间的对应关系可以是子载波间隔与可用符号数之间预定义的对应表。第二设备根据为第一设备配置的子载波间隔以及预定义的对应表，可以获知该第一设备的可用符号数。第二设备根据该可用符号数为第一设备配置进行回程传输的符号数或符号编号。可选地，第二设备可以将子载波间隔的配置信息发送给第一设备，第一设备根据预定义的对应表也可以获得其可用符号数。若第一设备默认情况下按照可用符号数确定的符号进行回程传输，则第二设备无需再为第一设备配置进行回程传输的符号数或符号编号。也就是说，第二设备通过子载波间隔信息隐式地通知了第一设备进行回程传输的符号数或符号编号。
根据第五方面至第八方面的任一方面，在一种可能的实现方式中，numerology信息与回程传输的可用符号的信息之间的对应关系可能有多个。例如，预定义的对应表可能有多个。该多个预定义的对应表主要与回程链路的传播时延等信息相关。因此，该方法还包括：第二设备接收第一设备上报的回程链路的信息；该第二设备根据该回程链路信息确定numerology信息与回程传输的可用符号数之间的对应关系。例如，回程链路的传播时延处于某一区间内时，对应某一个预定义的对应表。由此可以根据回程链路的传播时延确定预定义的对应表。
根据第第五方面至第八方面的任一方面，在一种可能的实现方式中，当第一设备发生移动或者连接切换时，需要更新上述对应关系。更新方法包括第二设备通过RRC、MAC层CE或下行控制信息(downlink control information,DCI)等信令，为第一设备配置新的对应关系。例如，在预定义的多个对应关系中，由第二设备利用RRC信令、MAC层CE或DCI通知第一设备具体是采用哪个对应关系。
第九方面，本发明实施例提供一种设备，所述设备包括收发器和处理器。所述存储器与所述处理器耦合。所述收发器进行消息的接收和/或发送。所述处理器运行存储器中的代码使得所述设备执行第一方面、第二方面、第五方面或第六方面任一项所述的方法。
第十方面，发明实施例提供一种可读存储介质，所述可读存储介质中存储有指令，当所述可读存储介质中存储的指令在设备上运行时，使得所述设备执行第一方面、第二方面、第五方面或第六方面任一项所述的方法。
第十一方面，发明实施例提供一种计算机程序产品，当所述计算机程序产品在计算机上运行时，使得所述计算机执行执行第一方面、第二方面、第五方面或第六方面任一项所述的方法。
第十二方面，本发明实施例提供一种芯片，所述芯片包括通信接口和处理器。所述通信接口进行消息的接收和/或发送。所述处理器运行存储器中的代码使得所述芯片执行第一方面、第二方面、第五方面或第六方面任一项所述的方法。
在本申请实施例的以上各个方面中，第二设备可以为从基站到终端的链路上第一设备的上一跳设备、上一级节点或者上游节点。其中，第一设备包括第一中继节点，第二设备包括基站。或者，第一设备包括第二中继节点，第二设备包括第三中继节点。第三中继节点为第二中继节点的上一跳设备。具体地，第一设备可以为本级中继节点，第二设备可以为本级中继节点的上一级中继节点。上一级中继节点通过接收可用符号的信息(或根据预定义的对应关系获得可用符号的信息)以及发送用于指示本级中继节点进行回程传输所占用符号的信息来配置本级中继节点的回程传输。在多跳中继的场景下，基站与第一中继节点，或者上一级中继节点与本级中继节点之间都可以采用本申请实施例提供的方法。因为上一级中继节点可以是起到中继作用的基站，所以上一级中继节点可以根据接收的可用符号的信息配置本级中继节点。
在本申请实施例提出的资源配置方法中，第一设备通过通知第二设备可用符号的信息，使得第二设备可以在可用或不可用的符号中做出较好的配置，从而可以适应中继节点连接切换、移动以及不同子载波间隔等回程传输的可用资源发生变化的情况，提供回程传输资源的利用率。
附图说明
图1是本申请的实施例应用的一种无线通信系统的架构示意图；
图2为本申请实施例提供的一种资源配置方法；
图3为一种BH下行传输场景下基站和中继节点的帧结构示意图；
图4为一种BH下行传输场景下基站和中继节点的帧结构示意图；
图5为一种BH上行传输场景下基站和中继节点的帧结构示意图；
图6为一种基站和中继节点的帧结构异步的下行传输示意图；
图7为一种基站和中继节点的帧结构异步的上行传输示意图；
图8为一种不同子载波间隔下BH下行传输的帧结构示意图；
图9为本申请实施例提供的一种资源配置方法示意图；
图10为本申请实施例提供的第一设备的一种可能的结构示意图；
图11为本申请实施例提供的第一设备的一种可能的逻辑结构示意图；
图12为本申请实施例提供的第二设备的一种可能的结构示意图；
图13为本申请实施例提供的第二设备的一种可能的逻辑结构示意图。
具体实施方式
图1是本申请的实施例应用的一种无线通信系统的架构示意图。如图1所示，该无线通信系统包括基站、中继节点以及终端。终端可以通过无线的方式与基站连接，并与基站进行数据传输。终端也可以通过无线的方式与中继节点连接，并与中继节点进行数据传输。图1中基站1与中继节点1之间存在回程链路，中继节点1与终端1之间存在接入链路，中继节点2与终端2之间存在接入链路，中继节点1与中继节点2直接存在回程链路，基站1与终端3之间存在直连链路。图1中的中继节点1还有可能切换到基站2。也就是说中继节点1断开与基站1的回程链路而与基站2建立回程链路。图1只是示意图，该通信系统中还可以包括其它网络设备，如更多的基站，更多的中继节点，更多的终端。
本申请实施例中的基站是终端通过无线方式接入到该无线通信系统中的接入设备，可以是基站、演进型基站、下一代通信系统中的基站或WiFi系统中的接入节点等。本申请实施例的中继节点可以是基站或者微基站。中继节点可以工作在低频段也可以工作在高频段。
本申请实施例中的终端也可以称为终端设备、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。终端可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、以及其他具有无线收发功能的终端等等。
在下一代通信系统中，中继节点尤其是高频中继节点的收发切换时间的典型值可能为8us，而子载波间隔为120KHz，则一个符号长度约8.9us。该符号可以是正交频分复用(Orthogonal frequency-division multiplexing,OFDM)符号。当基站和中继节点的帧结构异步时，中继节点由发到收的切换时间加上由收到发的切换时间约为16us。这大于一个符号长度，因此需要多个符号用作中继节点的收发切换。如果不同厂商的中继节点切换能力不一样，切换所需要的符号数也不一样。当基站和中继节点的帧结构同步时，在300m的站间距离(inter-site distance，ISD)的场景下，传播时延大约1us。若预留一个符号来进行收发切换，则可用于切换的时间为8.9us-1us＝7.9us左右。如前所述，中继节点的切换时间的典型值可能为8us，因此一个符号很可能是不够的。如果中继节点从一个基站切换到另一个基站，回程链路的传播时延就会改变，导致用于收发切换的符号数也可能变化。如图1所述，设在t 1时刻，中继节点1连接到基站1，基站1和中继节点1的物理距离较近，回程链路的传播时延较小。t 2时刻，中继节点1切换到基站2，基站2和中继节点1的物理距离较远，回程链路的传播时延较大。中继节点1在与基站2进行通信时，用于收发切换的符号可能会比与基站1进行通信时多。需要说明的是，本申请实施例中的收发切换时间也可以称为收发过渡时间。其主要是指中继节点和基站等网络设备进行收发切换时需要预留或空置的时间。收发切换时间具体可以包括从收到发的切换时间和/或从发到收的切换时间。基站和中继节点的帧结构同步是指基站和中继节点在进行通信时，两者之间传输的帧是定时对齐的。基站和中继节点的帧结构一步是指基站和中继节点在进行通信时，两者之间传输的帧是定时对齐的。
另外，在下一代通信系统中可能存在多种子载波间隔(例如15KHz至480KHz)，不同子 载波间隔对应的符号长度不一样，那么相同的收发切换时间所需预留(或空置，下同)的符号数也不相同，从而导致用于收发切换的符号数也可能变化。
因此，本申请实施例提供了一种资源配置方法，通过该方法，中继节点可以灵活配置各用于收发的符号数，从而保证回程链路的传输资源利用率的最大化。图2为本申请实施例提供的一种资源配置方法。在该方法中，第二设备可以为从基站到终端的链路上第一设备的上一跳设备、上一级节点或者上游节点。其中，第一设备包括第一中继节点，第二设备包括基站。或者，第一设备包括第二中继节点，第二设备包括第三中继节点。第三中继节点为第二中继节点的上一跳设备。具体地，第一设备可以为本级中继节点，第二设备可以为本级中继节点的上一级中继节点。在多跳中继的场景下，基站与第一中继节点，或者上一级中继节点与本级中继节点之间都可以采用本申请实施例提供的方法。例如，第一设备可以是图1中的中继节点1，第二设备可以是图1中的基站1。或者，第一设备可以是图1中的中继节点1，第二设备可以是图1中的中继节点2。该方法包括以下几个步骤。
步骤201：第一设备向第二设备发送第一消息，该第一消息携带回程传输的可用符号的信息。
其中，可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和第一设备的收发切换时间。可用符号数可以由不可用符号数以及回程传输所在的时隙的总符号数确定。在回程传输所在的时隙的总符号数已知的情况下，可用符号数等于回程传输所在的时隙的总符号数减去不可用符号数。类似地，可以由可用符号数得到不可用符号数。可用符号的编号可以由回程传输所在的时隙的所有符号以及不可用符号的编号确定。不可用符号的编号可以由回程传输所在的时隙的所有符号以及可用符号的编号确定。当然第一设备也可以上报收发切换时间、回程链路的传播时延，然后第二设备结合符号时间长度，通过计算得到回程传输的可用符号数。因此，回程传输的可用符号数可以根据符号时间长度、回程链路的传播时延和第一设备的收发切换时间来确定。另外，不论第一设备和第二设备之间帧结构同步还是异步，满足条件的不可用符号数或可用符号数可能是多个。在多个不可用符号数中值最小的称为最小不可用符号数。在多个可用符号数中值最大的称为最大可用符号数。
第二设备从第一设备接收第一消息。第二设备根据接收到的第一消息，可以为第一设备配置用于回程传输的符号数或符号编号。例如，第二设备配置第一设备在第一消息所指示的可用符号上进行回程传输。或者，第二设备按照第一设备上报的可用符号数确定不进行回程传输的符号。该不进行回程传输的符号不能是本应传输BH控制信息的符号。另外，在确定哪些符号不进行回程传输时，应当考虑对AC传输的影响尽可能小。为了保证资源利用率，也可以按照最大可用符号数确定具体进行回程传输的符号。第二设备可以将第一设备进行回程传输所占用符号的信息通过第二消息发送给第一设备。
在一种可能的实现方式中，可用符号的信息为可用符号的编号。可用符号的编号包括可用符号的起始符号编号和/或可用符号的结束符号编号。其中编号可以是第二设备为第一设备配置的索引(index)。可以通过对起始符号编号和结束符号编号进行编码得到与起始符号编号和结束符号编号对应的配置比特。可以预先定义一个第二设备和第一设备均已知的对应表。第一设备在上报可用符号编号时可以直接上报配置比特。第二设备根据对应表即可获得可用符号的编号。表1为一种配置比特与起始符号编号和结束符号编号的对应表。 如表1所示，在配置比特的个数为2的情况下，可以配置四种可用符号的编号。当然表1中具体的起始符号编号和结束符号编号的取值可以为其他值。另外也可以增加配置比特的个数以指示更多起始符号编号和结束符号编号的情况。
表1 一种配置比特与起始符号编号和结束符号编号的对应表
配置比特 起始符号编号 结束符号编号
00 0 13
01 0 12
10 0 11
11 0 10
第一设备可以利用无线资源控制(radio resource control，RRC)信令、介质访问控制(media access control，MAC)层的控制元素(control element，CE)和上行控制信令(uplink control information,UCI)等作为第一消息携带可用符号数或可用符号的编号。
步骤202：第一设备从第二设备接收第二消息，该第二消息用于指示第一设备进行回程传输所占用符号的信息。
其中，进行回程传输所占用符号的信息包括进行回程传输的符号数或符号编号。进行回程传输所占用符号的信息为符号编号时，第二设备可以发送类似表1的配置比特，以指示进行回程传输所占用符号的起始符号编号和结束符号编号。第二消息可以为RRC信令、MAC层CE等。第一设备根据第二消息的指示在相应的符号上进行回程传输。
本申请实施例中的RRC信令、MAC层CE可以由网络侧或者终端侧触发。一般来说其可以是非周期地发送的。当然，也可以是周期地发送的。
下面进一步用实施例对该资源配置方法进行详细说明。在下文的具体实施例中，以第一设备为第一中继节点，第二设备为基站为例进行说明。第一设备为第二中继节点，第二设备为第三中继节点的情况可以类似得到，便不再赘述。另外，为例描述的简洁，第一中继节点在具体实施例中被称为中继节点。通常情况下，为了资源利用率的最大化，中继节点向基站发送的第一消息中携带的是最大可用符号数。因此，下述实施例主要以可用符号的信息为最大可用符号数进行阐述，其他可用符号的信息的情况可以类似得到，因此不再赘述。
在基站和中继节点的帧结构同步的场景下，针对BH下行传输，中继节点可以通过第一消息向基站上报BH下行传输的最大可用符号数。基站向中继节点发送第二消息，来配置中继节点进行BH下行传输的符号数或符号编号。
图3为一种BH下行传输场景下基站和中继节点的帧结构示意图。如图3所示，其中“AC DL”好“BH DL”分别表示AC下行传输、BH下行传输。图3中的一个小方块表示一个符号。小方块内的数字表示该符号在其所在时隙内的编号。图3中有三个相连的时隙，每个时隙都有14个符号。其中每个时隙的符号个数可以更多或者更少，对此本申请不作限定。另外，为简单起见，BH下行传输的时隙内只有下行符号。在具体实现时，一个时隙内可以动态配置有上行符号和/或下行符号。当一个时隙内既有上行符号又有下行符号时，也可以用本申请提供的资源配置方法来预留用于收发切换的时间资源。本申请实施例中的时隙也可以理解为一段时间资源。其中，回程传输的时隙或者回程传输所在的时隙指的是一段用于回程 传输的时间资源。
图3的3个时隙中，中继节点在第一个时隙和第三个时隙进行AC下行传输，而其在第二个时隙进行BH下行传输，因此在第一个时隙与第二个时隙之间以及第二个时隙与第三个时隙之间均需要预留收发切换时间。
在图3中，T表示一个符号的时间长度，T p表示BH下行传输的传播时延。假设在t 1时刻，中继节点连接的基站为基站1，此时传播时延较小。如果时间T-T p够用于中继节点的收发切换，那么中继节点在进行BH下行传输时只需预留最后一个符号。在t 2时刻，假设中继节点切换连接到基站2，此时传播时延较大，T-T p不够用于中继节点的收发切换，因此BH下行传输需要预留2个符号，保证2T-T p足够用于中继节点的收发切换。以此类推。
具体地，中继节点完成初始接入或者从一个基站切换到另一个基站后，上报BH下行传输的最大可用符号数或可以符号的编号。最大可用符号数可以通过如下方法确定。假设BH下行传输所在的时隙的总符号数为m，中继节点的收发切换时间为T Rx/Tx，满足nT-T p≥T Rx/Tx的值最小的n即为需要预留的符号数。对BH下行传输来说，基站一般配置中继节点预留其所在时隙尾部的符号。m-n就是该时隙最大可用符号数。注意，如果T p不够用作中继节点的发/收切换，可以预留BH下行传输的第一个符号或者上一个时隙的最后一个符号。例如，图3中t 1时刻的中继节点在第一个时隙中的最后一个符号可以预留用于收发切换。
需要说明的是，基站可以测量回程链路的上行定时提前(time advance，TA)，TA＝BH下行传输的传播时延+BH上行传输的传播时延。如果上下行信道不具备互易性，基站就无法准确获知BH下行传输的传播时延和BH上行传输的传播时延。而且基站也不知道中继节点的收发切换时间，因此基站得不到准确的可用符号数。而中继节点根据下行同步以及全网定时，计算BH下行传输的传播时延，再结合中继节点的收发切换时间，即可得到需要预留(或空置)的符号数，因此由中继节点上报是最好的选择。
图4为一种BH下行传输场景下基站和中继节点的帧结构示意图。如图4所示，BH下行传输后面紧跟AC上行传输。其中“DL/UL gap”表示上行传输相对下行传输的定时提前量。举例来说，DL/UL gap可以认为是图4中进行AC上行传输的时隙相对于图3中第三个时隙(该时隙进行AC下行传输)的定时提前。由于“DL/UL gap”这个定时提前会占用图3中基站预留的若干个符号的一部分，剩余的时间资源可能不够用于基站的发收切换。因此，基站需判断这个剩余的时间资源是否够完成基站的收发切换或发收切换，如不行，则需要多预留一个或多个BH下行传输符号或AC上行传输符号。例如图4中BH下行传输的符号12也被预留用于收发切换。
在基站和中继节点的帧结构同步的场景下，针对BH上行传输，中继节点可以通过第一消息向基站上报BH上行传输的最大可用符号数。基站向中继节点发送第二消息，来配置中继节点进行BH上行传输的符号数或符号编号。
图5为一种BH上行传输场景下基站和中继节点的帧结构示意图。如图5所示，其中“AC UL”好“BH UL”分别表示AC上行传输、BH上行传输。BH上行传输的最大可用符号数的确定方法和BH下行传输类似。注意对BH上行传输来说，基站一般配置中继节点预留BH上行传输所在时隙头部的符号。原因在于：BH上行传输时隙尾部符号一般是用于上行控制信道或上行参考信号的传输，最好保证能够正常传输。预留BH上行传输所在时隙头部的符号是较好的选择。另外，中继节点的符号编号一般是以基站编号为基准，因此中继节点被打掉 和实际传输的符号编号也按照基站的编号规则进行确定。
在基站和中继节点的帧结构异步的场景下，中继节点可以通过第一消息向基站上报回程传输的最大可用符号数。基站向中继节点发送第二消息，来配置中继节点进行回程传输的符号数或符号编号。回程传输的最大可用符号数可以通过如下方法确定。不论对于BH上行传输或BH下行传输，假设中继节点的收发切换时间为T Rx/Tx，该收发切换时间具体可以包括收/发切换时间T Rx→Tx和发/收切换时间T Tx→Rx。满足nT≥T Rx/Tx的值最小的n即为需要预留的符号数，m-n就是该时隙最大可用符号数。需要说明的是，预留的符号的位置或编号根据基站和中继节点的异步定时关系和中继节点收发切换时间确定，可能包括回程传输所在时隙的头部或/和尾部的若干个符号。另外，对于中继节点只有收/发切换的情形，仍有可以根据nT≥T Rx→Tx得到n。此时可以认为T Tx→Rx为零。对于中继节点只有发/收切换的情形，仍有可以根据nT≥T Tx→Rx得到n。此时可以认为T Rx→Tx为零。基站接收中继节点上报的最大可用符号数以后，需要判断预留的符号是否能够满足基站收发切换的要求(与图4情况类似)。如果不行，则需要多预留一个或多个BH或AC符号，然后决定回程传输可用的符号数或符号编号。
图6为一种基站和中继节点的帧结构异步的下行传输示意图。图7为一种基站和中继节点的帧结构异步的上行传输示意图。满足nT≥T Rx/Tx的最小的n即为需要预留的符号数，由此可以得到在帧结构异步的情况下，具体需要预留的符号数是多少个。设得到的n的值为2时，如图6和图7所示，回程传输所在时隙的第一个符号和最后一个符号预留用于中继节点的收发切换。
在图6中中继节点的AC下行传输相对基站的AC下行传输有固定的时延T D。在图7中中继节点的AC上行传输相对基站AC上行传输有固定的定时提前T A。固定的时延T D和固定的定时提前T A可以是预先定义的,T D和T A与回程链路的传播时延以及为回程传输的预留符号数之间没有必然联系。一般来说，通过控制T D和T A的取值范围，不会影响最小预留符号数n。但是，如果T D和T A的值超过一定范围，需要增加预留符号的个数。也就是说，满足nT≥T Rx/Tx的最小的n不是最终预留的符号数，最终预留的符号数需要在n的基础上再增加一个或多个符号。该增加的一个或多个符号一般可以在回程传输所在时隙的头部或者尾部。即，在在回程传输所在时隙的头部或尾部多预留一个或多个符号。
另一方面，在实际实现中，也可以通过预定义最大可用符号数与子载波间隔(或其他numerology)的对应关系来确定最大可用符号数。其中，numerology为通信系统所采用的参数。通信系统(例如5G)可以支持多种numerologies。numerology可以通过以下参数信息中的一个或多个定义：子载波间隔，循环前缀(cyclic prefix,CP)，时间单位，带宽等。例如，numerology可以由子载波间隔和CP来定义。子载波间隔可以为15KHz、30KHz、60KHz、120KHz、240KHz、480KHz等。CP信息可以包括CP长度和/或者CP类型。带宽可以为频域上一段连续的资源。
图8为一种不同子载波间隔下BH下行传输的帧结构示意图。设一个时隙内的BH下行传输的符号数为14，中继节点的收发切换时间为8us，BH下行传输的传播时延1us。图8中三种子载波间隔分别为120KHz、240KHz、480KHz，则这三种子载波间隔对应的符号长度分别为8.92us、4.46us、2.23us。以帧结构同步的情况为例，满足nT-T p≥T Rx/Tx的值最小的n分别为2、3、5。因此，需要预留的符号数分别为2、3、5。如表2所示，最大 可用符号数为12、11、9。当一个时隙内BH下行传输的符号数为其他个数时，可以类似得到该时隙最大可用符号数。例如，对于某些短时隙(例如mini-slot)，该时隙内的BH下行传输的符号数可能为7，利用本申请提供的方法，可以得到最大可用符号数为表3所示。对于不同的BH下行传输的传播时延(如中继节点从一个基站切换到另一个基站所造成的传播时延的改变)，类似可以得到最大可用符号数与子载波间隔(或其他numerology)的对应关系。因此，最大可用符号数与子载波间隔(或其他numerology)之间存在多组对应关系。在帧结构异步的情况下也可以参照上文提供的方法得到各个子载波间隔对应的预留的符号数或最大可用符号数，在此不再赘述。类似地，BH上行传输的情况也可以参照上文提供的方法得到各个子载波间隔对应的预留的符号数或最大可用符号数，在此不再赘述。
表2 一种子载波间隔与回程传输的最大可用符号数的对应关系表
子载波间隔(Hz) 120K 240K 480K
回程传输的最大可用符号数 12 11 9
表3 另一种子载波间隔与回程传输的最大可用符号数的对应关系表
子载波间隔(Hz) 120K 240K 480K
回程传输的最大可用符号数 5 4 2
在预定义了回程传输的最大可用符号数与子载波间隔(或其他numerology)的对应关系的情况下，基站可以直接为中继节点配置资源。图9为本申请实施例提供的一种资源配置方法示意图。该方法包括以下几个步骤。
步骤901：基站生成配置消息，该配置消息携带为中继节点配置进行回程传输所占用符号的信息，该进行回程传输所占用符号的信息是该基站根据numerology信息与回程传输的可用符号的信息之间的对应关系以及该中继节点的numerology信息得到的。
其中，numerology信息与回程传输的可用符号的信息之间的对应关系可以是子载波间隔与回传传输的可用符号数或不可用符号数之间的对应表。例如表2和表3中，numerology信息与回程传输的可用符号的信息之间的对应关系是子载波间隔和回程传输的最大可用符号数之间的对应表。表2或3中的子载波间隔可以替换为其他numerology信息，例如，循环前缀，时间单位，带宽。回程传输的最大可用符号数也可以替换为其他可用符号的信息，例如，可用符号的编号、不可用符号的编号、回程链路的传播时延和所述中继节点的收发切换时间。
步骤902：基站向中继节点发送配置消息。
中继节点接收该配置消息。中继节点根据该配置消息进行回程传输。
在本实施例中，基站可以基于回程传输的最大可用符号数与子载波间隔(或其他numerology)的对应关系，通过子载波间隔隐式通知中继节点回程传输的最大可用符号数。具体地，基站可以将子载波间隔的配置信息发送给中继节点，中继节点根据预定义的对应表也可以获得其最大可用符号数。若中继节点默认情况下按照最大可用符号数确定的符号进行回程传输，则基站无需再为中继节点配置进行回程传输的符号数或符号编号。当中继节点发生移动或者连接切换时，需要更新上述对应关系，更新方法包括基站通过RRC、MAC层CE或下行控制信息(downlink control information,DCI)等信令，为中继节点配置 新的对应关系(类似表2和表3)。例如，在预定义的多个对应关系中，由基站利用RRC信令、MAC层CE或DCI通知中继节点具体是采用哪个对应关系。在一种可能的实现方式中，numerology信息与回程传输的可用符号的信息之间的对应关系可能有多个。例如，预定义的对应表可能有多个。该多个预定义的对应表主要与回程链路的传播时延等信息相关。因此，该方法还包括：基站接收中继节点上报的回程链路的信息；该基站根据该回程链路信息确定numerology信息与回程传输的最大可用符号数之间的对应关系。例如，回程链路的传播时延处于某一区间内时，对应某一个预定义的对应表。由此可以根据回程链路的传播时延确定预定义的对应表。
本申请实施例提出的资源配置方法，可以适应中继节点连接切换、移动以及不同子载波间隔等回程传输的可用资源发生变化的情况，提供回程传输资源的利用率。
相应于上述方法实施例，本申请实施例可以对第一设备和第二设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，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。
在采用对应各个功能划分各个功能模块的情况下，图10为本申请实施例提供的第一设备的一种可能的结构示意图，第一设备包括：发送单元1001、接收单元1002。其中，发送单元1001用于支持方法实施例中第一设备发送第一消息(或可用符号的信息)的相关步骤。例如，第一设备执行图2中的步骤201。接收单元1002用于支持第一设备接收第二消息(或第二设备关于回程传输的配置)的相关步骤。例如，第一设备执行图2中的步骤202。可选的，第一设备还包括：处理单元1003，用于支持第一设备对可用符号的信息以及关于回程传输的配置等的相关步骤。
在硬件实现上，上述处理单元1003可以为处理器或者处理电路等；发送单元1001可以为发送器或者发送电路等，接收单元1002可以为接收器或者接收电路等，发送单元1001和接收单元1002可以构成通信接口。
图11所示，为本申请实施例提供的第一设备的一种可能的逻辑结构示意图。第一设备包括：通信接口1103。在本申请的实施例中，通信接口1103用于支持该第一设备进行通信。例如，通信接口1103用于支持第一设备发送第一消息的相关步骤，或支持第一设备接收第二设备的相关步骤。可选的，第一设备还可以包括存储器1101、总线1104和处理器1102。处理器1102以及存储器1101可以通过总线1104相互连接。其中，处理器1102可以用于支持第一设备对可用符号的信息以及关于回程传输的配置等的相关步骤。其中，该存储器1101，该存储器用于存储第一设备的代码和数据。
在采用对应各个功能划分各个功能模块的情况下，图12为本申请实施例提供的第二设备的一种可能的结构示意图，第二设备包括：接收单元1201和发送单元1202。其中，接收单元1201用于支持第二设备接收第一消息的相关步骤。发送单元1202用于支持第二设备发送第二消息的相关步骤。可选的，该第二设备还可以包括处理单元1203。处理单元1203用于第二设备处理可用符号的信息和/或对第一设备进行回程传输配置的相关步骤。
在硬件实现上，上述处理单元1203可以为处理器或者处理电路等；发送单元1202可 以为发送器或者发送电路等，接收单元1201可以为接收器或者接收电路等，发送单元1202和接收单元1201可以构成通信接口。
图13所示，为本申请实施例提供的第二设备的一种可能的逻辑结构示意图。第二设备包括：通信接口1303。在本申请的实施例中，通信接口1303用于支持第二设备进行通信。例如，通信接口1303用于支持第二设备接收第一消息和/或发送第二消息。可选的，第二设备还可以包括存储器1301、总线1304和处理器1302。处理器1302和存储器1301通过总线1304相互连接。其中，存储器1301用于存储第二设备的程序代码和数据。处理器1302调用存储器1301中存储的代码进行控制管理。该存储器1301可以跟处理器耦合在一起，也可以不耦合在一起。
在具体实现中，处理器1102以及处理器1302可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本申请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的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。总线1104以及总线1304可以是外设部件互连标准PCI总线或扩展工业标准结构EISA总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图11以及图13中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
上述主要从各个网元之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，各个网元，例如第一设备、第二设备和第三设备为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的网元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，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申请的范围。
在本申请的另一实施例中，还提供一种可读存储介质，可读存储介质中存储有计算机执行指令，当一个设备(可以是单片机，芯片等)或者处理器可以调用可读存储介质中存储有计算机执行指令来执行图2所提供的方法中第一设备或者第二设备的步骤或或者执行图9所提供的方法中中继节点或者基站的步骤。前述的可读存储介质可以包括：U盘、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
在本申请的另一实施例中，还提供一种计算机程序产品，该计算机程序产品包括计算机执行指令，该计算机执行指令存储在计算机可读存储介质中；设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令，至少一个处理器执行该计算机执行指令使得设备实施图2所提供的方法中第一设备或者第二设备的步骤或或者执行图9所提供的方法中中继节点或者基站的步骤。
在本申请的另一实施例中，还提供一种通信系统，该通信系统包括多个设备，该多个设备包括第一设备和第二设备。其中，第一设备可以为图10或图11所提供的第一设备，且用于执行图2或者图9所提供的方法中第一设备的步骤；和/或，第二设备可以为图12或图13所提供的第二设备，且用于执行图2或者图9所提供的方法中第二设备的步骤。
本申请实施例还提供了一种实现上述实施例(例如图2或图9)描述的方法的芯片。该芯片包括处理电路和收发电路。所述收发电路例如可以是输入/输出接口、管脚或电路等。该处理电路可执行存储单元存储的计算机执行指令。该芯片还可能包括存储单元。所述存储单元可以是寄存器、缓存等。当然，也可以为该芯片提供额外的存储单元。例如，存储单元还可以是终端或接入设备内的位于所述芯片外部的存储单元，如只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)等。该芯片可以应用与基站或中继节点。
最后应说明的是：以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何在本申请揭露的技术范围内的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。
本申请的又一方面提了一种设备，所述设备包括所述处理器运行存储器中的代码使得所述设备执行前述的各种方法。该存储器中存储代码和数据。该存储器位于所述设备中，该所述存储器所述处理器耦合。该存储器也可以位于所述设备之外。
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。
综上所述，以上仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (28)

  1. 一种资源配置方法，其特征在于，所述方法包括：
    第一设备向第二设备发送第一消息，所述第一消息携带回程传输的可用符号的信息；其中，所述第一设备包括第一中继节点，所述第二设备包括基站；或者，所述第一设备包括第二中继节点，所述第二设备包括第三中继节点；
    所述第一设备从所述第二设备接收第二消息，所述第二消息用于指示所述第一设备进行回程传输所占用符号的信息。
  2. 根据权利要求1所述的方法，其特征在于，
    所述可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和所述第一设备的收发切换时间。
  3. 根据权利要求2所述的方法，其特征在于，
    所述可用符号数由符号时间长度、所述回程链路的传播时延和所述第一设备的收发切换时间来确定。
  4. 根据权利要求3所述的方法，其特征在于，
    当所述第一设备和所述第二设备之间帧结构同步时，所述可用符号数N＝m-n，其中m为回程传输所在时隙的总符号数，n为满足nT-T p≥T Rx/Tx的n，且n小于m，T表示一个符号的时间长度，T p表示回程传输的传播时延，T Rx/Tx表示所述第一设备的收发切换时间。
  5. 根据权利要求3所述的方法，其特征在于，
    当所述第一设备和所述第二设备之间帧结构异步时，所述可用符号数N＝m-n，其中m为回程传输所在时隙的总符号数，n为满足nT≥T Rx/Tx的n，且n小于m，T表示一个符号的时间长度，T Rx/Tx表示所述第一设备的收发切换时间。
  6. 一种资源配置方法，其特征在于，所述方法包括：
    第二设备从第一设备接收第一消息，所述第一消息携带回程传输的可用符号的信息；
    所述第二设备向所述第一设备发送第二消息，所述第二消息用于指示所述第一设备进行回程传输所占用符号的信息。
  7. 根据权利要求6所述的方法，其特征在于，
    所述可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和所述第一设备的收发切换时间。
  8. 根据权利要求7所述的方法，其特征在于，
    所述可用符号数由符号时间长度、所述回程链路的传播时延和所述第一设备的收发切换时间来确定。
  9. 根据权利要求8所述的方法，其特征在于，
    当所述第一设备和所述第二设备之间帧结构同步时，所述可用符号数N＝m-n，其中m为回程传输所在时隙的总符号数，n为满足nT-T p≥T Rx/Tx的n，且n小于m，T表示一个符号的时间长度，T p表示回程传输的传播时延，T Rx/Tx表示所述第一设备的收发切换时间。
  10. 根据权利要求8所述的方法，其特征在于，
    当所述第一设备和所述第二设备之间帧结构异步时，所述可用符号数N＝m-n，其中m为回程传输所在时隙的总符号数，n为满足nT≥T Rx/Tx的n，且n小于m，T表示一个符号的时间长度，T p表示回程传输的传播时延，T Rx/Tx表示所述第一设备的收发切换时间。
  11. 一种用于资源配置的第一设备，其特征在于，所述第一设备包括：
    发送单元，用于向第二设备发送第一消息，所述第一消息携带回程传输的可用符号的信息；其中，所述第一设备包括第一中继节点，所述第二设备包括基站；或者，所述第一设备包括第二中继节点，所述第二设备包括第三中继节点；
    接收单元，用于从所述第二设备接收第二消息，所述第二消息用于指示所述第一设备进行回程传输所占用符号的信息。
  12. 根据权利要求11所述的第一设备，其特征在于，
    所述可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和所述第一设备的收发切换时间。
  13. 根据权利要求12所述的第一设备，其特征在于，
    所述可用符号数由符号时间长度、所述回程链路的传播时延和所述第一设备的收发切换时间来确定。
  14. 根据权利要求13所述的第一设备，其特征在于，
    当所述第一设备和所述第二设备之间帧结构同步时，所述可用符号数N＝m-n，其中m为回程传输所在时隙的总符号数，n为满足nT-T p≥T Rx/Tx的n，且n小于m，T表示一个符号的时间长度，T p表示回程传输的传播时延，T Rx/Tx表示所述第一设备的收发切换时间。
  15. 根据权利要求13所述的第一设备，其特征在于，
    当所述第一设备和所述第二设备之间帧结构异步时，所述可用符号数N＝m-n，其中m为回程传输所在时隙的总符号数，n为满足nT≥T Rx/Tx的n，且n小于m，T表示一个符号的时间长度，T Rx/Tx表示所述第一设备的收发切换时间。
  16. 一种用于资源配置的第二设备，其特征在于，所述第二包括：
    接收单元，用于从第一设备接收第一消息，所述第一消息携带回程传输的可用符号的信息；
    发送单元，用于向所述第一设备发送第二消息，所述第二消息用于指示所述第一设备进行回程传输所占用符号的信息。
  17. 根据权利要求16所述的第二设备，其特征在于，
    所述可用符号的信息包括以下一个或多个：可用符号数、可用符号的编号、不可用符号数、不可用符号的编号、回程链路的传播时延和所述第一设备的收发切换时间。
  18. 根据权利要求17所述的第二设备，其特征在于，
    所述可用符号数由符号时间长度、所述回程链路的传播时延和所述第一设备的收发切换时间来确定。
  19. 根据权利要求18所述的第二设备，其特征在于，
    当所述第一设备和所述第二设备之间帧结构同步时，所述可用符号数N＝m-n，其中m为回程传输所在时隙的总符号数，n为满足nT-T p≥T Rx/Tx的n，且n小于m，T表示一个符号的时间长度，T p表示回程传输的传播时延，T Rx/Tx表示所述第一设备的收发切换时间。
  20. 根据权利要求18所述的第二设备，其特征在于，
    当所述第一设备和所述第二设备之间帧结构异步时，所述可用符号数N＝m-n，其中m为回程传输所在时隙的总符号数，n为满足nT≥T Rx/Tx的n，且n小于m，T表示一个符号的时间长度，T p表示回程传输的传播时延，T Rx/Tx表示所述第一设备的收发切换时间。
  21. 一种资源配置方法,其特征在于，所述方法包括：
    第二设备生成配置消息，所述配置消息携带为第一设备配置进行回程传输所占用符号的信息，所述进行回程传输所占用符号的信息是所述第二设备根据numerology信息与回程传输的可用符号的信息之间的对应关系以及所述第一设备的numerology信息得到的；
    所述第二设备向第一设备发送配置消息。
  22. 一种资源配置方法,其特征在于，所述方法包括：
    第一设备从第二设备接收所述配置消息，所述配置消息携带为第一设备配置进行回程传输所占用符号的信息，所述进行回程传输所占用符号的信息是所述第二设备根据numerology信息与回程传输的可用符号的信息之间的对应关系以及所述第一设备的numerology信息得到的；
    所述第一设备根据所述配置消息进行回程传输。
  23. 一种第一设备,其特征在于，所述第一设备包括：
    接收单元，用于从第二设备接收所述配置消息，所述配置消息携带为第一设备配置进行回程传输所占用符号的信息，所述进行回程传输所占用符号的信息是所述第二设备根据numerology信息与回程传输的可用符号的信息之间的对应关系以及所述第一设备的numerology信息得到的；
    处理单元，用于根据所述配置消息进行回程传输。
  24. 一种第二设备,其特征在于，所述第二设备包括：
    处理单元，用于生成配置消息，所述配置消息携带为第一设备配置进行回程传输所占用符号的信息，所述进行回程传输所占用符号的信息是所述第二设备根据numerology信息与回程传输的可用符号的信息之间的对应关系以及所述第一设备的numerology信息得到的；
    发送单元，用于向所述第一设备发送配置消息。
  25. 一种设备,其特征在于，所述设备包括收发器和处理器；
    所述处理器运行存储器中的代码使得所述设备执行权利要求1-10、21、22任一项所述的方法。
  26. 一种可读存储介质,其特征在于，所述可读存储介质中存储有指令；
    当所述可读存储介质中存储的指令在设备上运行时，使得所述设备执行权利要求1-10、21、22任一项所述的方法。
  27. 一种计算机程序产品,其特征在于，
    当所述计算机程序产品在计算机上运行时，使得所述计算机执行执行权利要求1-10、21、22任一项所述的方法。
  28. 一种芯片,其特征在于，所述芯片包括通信接口和处理器；
    所述通信接口进行消息的接收和/或发送。所述处理器运行存储器中的代码使得所述芯片执行权利要求1-10、21、22任一项所述的方法。
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EP18885955.7A EP3716500A4 (en) 2017-12-08 2018-12-07 RESOURCE ALLOCATION PROCESS AND DEVICE
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