WO2018137551A1

WO2018137551A1 - Cyclic prefix determination method and radio network equipment

Info

Publication number: WO2018137551A1
Application number: PCT/CN2018/073253
Authority: WO
Inventors: 吴宁; 唐臻飞; 李新县; 唐浩; 马瑞泽大卫•简-玛丽
Original assignee: 华为技术有限公司
Priority date: 2017-01-26
Filing date: 2018-01-18
Publication date: 2018-08-02
Also published as: CN108366028A; CN108366028B

Abstract

A cyclic prefix (CP) determination method and radio network equipment. The method comprises: radio network equipment determining CP configuration information comprising at least one of a CP configuration period, a CP type, and a CP length; and the radio network equipment determining a CP in a first time unit on the basis of the CP configuration information. The application is adopted to implement flexible configuration or switching for various CP types.

Description

Cyclic prefix CP determining method and wireless network device

Technical field

The present application relates to the field of communications technologies, and in particular, to a cyclic prefix CP determining method and a wireless network device.

Background technique

In a wireless communication system based on OFDM (English: Orthogonal Frequency Division Multiplexing, OFDM, Chinese: Orthogonal Frequency Division Multiplexing), in order to resist inter-symbol interference caused by channel multipath, a cyclic prefix is added to the symbol ( English: Cyclic Prefix, abbreviation: CP) design. Among them, the larger the delay spread of multipath, the longer the demand for CP. For a sub-carrier spacing, in order to meet the delay spread requirements of different scenarios, a CP type (English: Normal Cyclic Prefix, abbreviation: NCP) or an extended CP (English: Extended Cyclic Prefix, ECP) can be used. Among them, NCP and ECP are two CP types with different lengths, the ECP length is longer than the NCP length, and the CP overhead is higher.

In the data transmission, as the channel delay of the user changes, the requirements for the CP type may be different, so flexible configuration between different CP types is required. However, in the fifth generation mobile communication technology (English: The Fifth Generation Mobile Communication Technology, abbreviation: 5G) technology, a multi-subcarrier spacing design is proposed to support service diversity and scene diversity, for subcarrier spacing greater than 15 kHz. The length of one time unit (such as a time slot) of the NCP and the ECP may be different. The time unit boundaries of different CP types in the real-time domain may not be aligned. Therefore, the flexible configuration of the CP type at the time unit level cannot be performed. For example, the subcarrier spacing is 60 kHz, the 20 MHz system bandwidth (sampling rate is 30.72 MHz, 0.5 ms total 15360 sampling points (denoted as: Ts)), one time unit is one time slot as an example, as shown in FIG. Is the length of the NCP and ECP in 0.5ms when the subcarrier spacing is 60kHz. It is assumed that the first time slot is NCP (the time slot length is 3852Ts, about 0.12539ms). If you need to switch from NCP to ECP, it will be the second. The time slot is switched to ECP (slot length is 3840Ts, 0.125ms). Since the end time of the NCP time slot covers the start time of some ECP time slots, flexible configuration of different CP types cannot be realized.

Summary of the invention

The embodiment of the invention provides a method for determining a CP and a wireless network device, which can implement flexible configuration of different CP types.

In a first aspect, an embodiment of the present invention provides a method for determining a CP, including:

The first wireless network device determines CP configuration information, where the CP configuration information may include at least one of a CP configuration period, a CP type, and a CP length;

The first wireless network device determines the CP of the first time unit based on the CP configuration information.

The CP type may be a first CP type such as an NCP, or a second CP type such as an ECP.

In some possible implementations, the CP configuration information may include a CP configuration period and a CP type, where the CP configuration period is a predefined or signaling-based configured length of time, which may be K x milliseconds. Further, the first wireless network device may further send a message to the second wireless network device based on the CP configuration period, where the message is used to indicate the CP type.

The CP type may be the first CP type or the second CP type. The first CP type may be an NCP, and the second CP type may be an ECP, and the CP configuration period may be a preset or signaling configuration or a length of time determined by an internal algorithm, such as K x milliseconds, the K x Z time units may be included in milliseconds, that is, the time length may also be described as Z time units, which may be symbols/slots/subframes, etc., and Z and K may be integers greater than or equal to 1, x Greater than 0. Optionally, the x milliseconds may be 0.5 milliseconds (ms), that is, the CP configuration period may be 0.5 ms*K.

Further optionally, the CP configuration information may be used to determine a CP configuration of at least one symbol or a channel in the first time unit.

In some possible implementations, the CP configuration information may include a CP configuration period and a CP type, where the unit of the first time unit is a first time unit; when the CP type is the first CP type, the CP configuration period is at least a first time unit; when the CP type is the second CP type, the CP configuration period is a length of time determined based on a predefined or signaling configuration or an internal algorithm, and the length of the time may be K x milliseconds, such as x 0.5. Further, the first wireless network device may further send a message to the second wireless network device based on the CP configuration period, where the message is used to indicate the CP type.

The first wireless network device may be a base station or a terminal; the second wireless network device may be a terminal or a base station. For example, the communication involved in the embodiment of the present invention may be between the base station and the terminal, or between the base station and the base station, such as between the macro base station and the small base station, or between the terminal and the terminal. For example, communication in a D2D network.

When the CP type indicated by the CP configuration information is the first CP type, the length of the CP configuration period may be an integer (1 or more, that is, at least one) length of the first time unit; when the CP configuration information indicates When the CP type is the second CP type, the CP configuration period may be a time length determined according to a predefined or signaling configuration or an internal algorithm, such as Z time units or K*x milliseconds, and x may be 0.5. Thereby, the first wireless network device can configure the CP of the time unit within the CP configuration period in which the first time unit is located as the CP type CP indicated by the CP configuration information.

Further optionally, the first wireless network device may send the message to the second wireless network device by using the second time unit. The second time unit may be determined based on at least one of a first time unit included in a second time unit, a first offset parameter, and the CP configuration period. The time unit of the first time unit and the second time unit is a first time unit; and the second time unit includes at least one first time unit, such as a length of the at least one first time unit and equal to one The length of the second time unit, for example, the first time unit may be a time slot, and the second time unit may be a subframe. Further, the unit of the first offset parameter may correspond to the unit of the first time unit and the second time unit, that is, the unit of the first offset parameter may be the first time unit, or other time units. The first offset parameter may be predefined or configured by signaling, and may be used to determine an offset value of the second time unit within the CP configuration period or a second time unit. Therefore, the first wireless network device can perform CP configuration by determining the CP configuration period and the CP type, so that the CP types in each CP configuration period, such as 0.5 ms*K, are the same, thereby avoiding the problem of boundary misalignment and achieving a 0.5 ms level. The flexible configuration/handover of the CP type reduces the number of messages in the system, thereby reducing system signaling overhead.

Further optionally, the CP configuration period may also be predefined or signaled to the second wireless network device.

Further, the message or signaling may be high-level information, such as a broadcast message, a system message, a downlink message in an access process, a radio resource control (English: Radio Resource Control, abbreviation: RRC) signaling, or a media access. Control (English: Media Access Control or Medium Access Control, abbreviation: MAC) CE (Control Element), or physical layer control signaling. Alternatively, the message or signaling may also be physical layer downlink control information (English: Downlink Control Information, abbreviated as DCI), and the like, which is not limited in this application.

Further optionally, the CP configuration information may further include a second offset parameter, where the second offset parameter may be determined based on at least one of an identifier of the second time unit and the CP configuration period; or The second offset parameter may also be implemented based on a predefined or signaling or internal algorithm.

Further, the CP of the time unit included in the range before the CP configuration period corresponding to the next CP configuration information may be configured as the CP type CP indicated by the CP configuration information. This enables periodic CP configuration with low system overhead.

In some possible implementations, the CP configuration information may include a CP type and a CP length, and the CP type is a second CP type; the CP length may be a subcarrier spacing based on the first time unit, the first time unit The identification and the number of first time units included in a third time unit are determined. The time unit of the first time unit is a first time unit, and one third time unit includes at least one first time unit, that is, the length of one third time unit is the same as the length of at least one first time unit. That is, a third unit in the time domain contains an integer number of the first time units, such as an integer number of lengths of the first time unit in the time domain and a length equal to one third time unit. For example, the first time unit may be a time slot, and the third time unit may be 0.5 ms*K or P time slots, where K and P are integers greater than or equal to 1.

Optionally, if the CP of the current time slot is a CP of the second CP type, such as an ECP, the previous time slot of the current time slot in the time domain is a CP of the first CP type, such as an NCP, that is, when the NCP needs to be switched from the NCP to the ECP, If the normal handover needs to be implemented, the length of the partial CP in the current time slot that is not shorter than the ECP time slot covered by the NCP time slot may be cancelled, that is, according to the sub-carrier spacing, the time slot number, and the per-configuration period of the current time slot. At least one of the number of slots included in 0.5 ms determines the CP length to achieve boundary alignment. Optionally, the sub-carrier spacing of the current time slot and the previous time slot of the current time slot may be the same or different, which is not limited in this application. Therefore, the first wireless network device can implement the slot-level switching of the NCP to the ECP by configuring the CP length of the ECP, thereby avoiding the problem that the switching cannot be performed due to the boundary misalignment when the CP type is switched.

Optionally, when switching from the NCP to the ECP, the first wireless network device may use the length of the CP obtained by the preset rule as the length of the CP of the first time unit, where the CP length obtained by the preset rule is all the switching scenarios. The shortest ECP length in the first time unit may be the time unit corresponding to the first ECP after the handover. Therefore, it is possible to reduce the design complexity by configuring the length of the CP of the switched first time unit to the preset CP length.

Further, the CP type and/or the CP length included in the CP configuration information may also be predefined, or the first wireless network device may be notified to the second wireless network device by using a signaling, which is not limited in this application.

In some possible implementations, the CP configuration information may include a CP type, where the CP type is a first CP type or a second CP type; the first wireless network device determines a CP of the first time unit based on the CP configuration information, where Specifically, the first wireless network device configures the CPs of the first M symbols and/or the last N symbols of the first time unit as the CP of the CP type indicated by the CP configuration information; the first wireless network device uses the first time The CP configuration of the remaining symbols in the unit (such as may be implemented based on a predefined or signaling configuration or an internal algorithm) is the CP of the first CP type or the second CP type, and the remaining symbols are in the first time unit. The M and the symbols other than the N symbols. Wherein, M and N are integers greater than 0, and the sum of M and N is not greater than the total number of symbols included in the first time unit.

Optionally, the CP type indicated by the CP configuration information may be a first CP type, such as an NCP; the first wireless network device configures the first M symbols of the first time unit and/or the CP of the last N symbols as the The CP of the CP type indicated by the CP configuration information may be specifically: the first wireless network device configures the CPs of the first M symbols and the last N symbols of the first time unit as the CP of the first CP type.

That is to say, taking the time unit as the time slot as an example, one time slot may all be an NCP symbol or include an NCP and an ECP symbol. The first M symbols and the last N symbols in one slot are fixed NCP symbols, and the values of the M and N may be predefined or configured by the first radio network device signaling. The remaining symbols may be NCP or ECP, and the CP type of the remaining symbols may be determined by a predefined or signaling configuration. Further optionally, the symbols corresponding to M and N may be used for different channels, that is, different symbols in the time slots are used for different channels. For example, the first M symbols can be used for the downlink control channel and the last N symbols for the uplink control channel.

Optionally, the CP type indicated by the CP configuration information may be a second CP type, such as an ECP; the first wireless network device configures the first M symbols of the first time unit and/or the CP of the last N symbols as the The CP of the CP type indicated by the CP configuration information may be specifically: the first wireless network device configures the CP of the last N symbols of the first time unit as the CP of the second CP type.

That is, one time slot can be all ECP symbols or include NCP and ECP symbols. The last N symbols in one slot are fixed ECP symbols, and the value of the N may be predefined or configured by the first radio network device signaling. The remaining symbols may be NCP or ECP, and the CP type of the remaining symbols may be determined by a predefined or signaling configuration. Further optionally, the N symbols are available for the uplink control channel.

Further, in one time slot, symbol information such as a symbol length, a symbol position, a symbol number, and a slot number of the NCP may be determined according to NCP symbol information, that is, when the symbol information and all the slots in the time slot are NCP symbols. The symbol information is the same; the symbol information such as the symbol length, the symbol position, the symbol number, and the slot number of the ECP may be determined according to the ECP symbol information, that is, the symbol information is the same as the symbol information when all the ECP symbols in the slot are in the slot. Therefore, the first wireless network device can fix the number of the CPs of the plurality of symbols, so that the length of the time slot is only one type, and there is no case where the lengths of the NCP time slot and the ECP time slot are different, thereby solving the boundary misalignment when the CP type is switched. The problem, and can further meet the performance requirements of the service data transmission by configuring the CP type of the remaining symbols in the time slot.

In some possible implementations, the CP configuration information may include a CP type. The first wireless network device determines a CP of the first time unit based on the CP configuration information, and may be specifically: the first wireless network device indicates, according to the CP configuration information. The CP type determines the location of the first time unit; the first wireless network device configures the symbol within the first time unit or the CP configuration of the at least one channel (eg, based on a predefined or signaling configuration or an internal algorithm to implement the configuration) CP of the first CP type or the second CP type.

The CP type included in the CP configuration information may be obtained based on a predefined or signaling configuration or an internal algorithm.

Optionally, the time unit is used as a time slot, where the location may be a time slot location, and the time slot location of the first time unit may be a time slot of the CP type indicated by the first wireless network device according to the CP configuration information. The position (all time slots in the time domain corresponding to the slot position of the symbol of the CP type) is determined.

Further, the first wireless network device determines, according to the CP configuration information, the CP of the first time unit, where the first wireless network device determines, according to the CP configuration information, at least one channel or one in the first time unit. Symbolic CP. That is, when the first wireless network device performs CP configuration on the symbol or channel in the time slot based on the determined CP configuration information, the CP may be configured (or switched) only for some channels or partial symbols in the time slot. The CP type of the remaining channels or symbols can be predefined.

Optionally, the CP type determined by the CP configuration information may be a first CP type, that is, an NCP, and the first wireless network device may determine the first time unit according to a time slot length and a position when all the NCP symbols in the time domain are in the time domain. The slot position. Alternatively, optionally, the CP type determined by the CP configuration information may be the second CP type, that is, the ECP, and the first wireless network device determines the first time according to the time slot length and position when all the ECP symbols in the time domain are in the time domain. The slot position of the unit. Further optionally, the first wireless network device may implement, by using a predefined or signaling configuration or an internal algorithm, configuring at least one symbol in the first time unit as the first CP type or the second CP type, or by pre-defining or The signaling configuration or the internal algorithm is configured to configure the at least one channel in the first time unit as the first CP type or the second CP type, where the CP types of different symbols or different channels may be the same or different, and the application does not limit the application. . Therefore, the first wireless network device can pass the fixed CP type of the time slot, so that the length of the time slot is only one type, and there is no case where the lengths of the NCP time slot and the ECP time slot are different, thereby solving the boundary misalignment when the CP type is switched. The problem, and can further meet the performance requirements of the service data transmission by configuring the CP type of the remaining symbols in the time slot.

In a second aspect, an embodiment of the present invention further provides a method for determining a CP, including:

The second wireless network device determines CP configuration information, where the CP configuration information includes at least one of a CP configuration period, a CP type, and a CP length;

The second wireless network device determines the CP of the first time unit based on the CP configuration information.

In some possible implementations, the CP configuration information may include a CP configuration period and a CP type, where the CP configuration period is a predefined or signaling-based configured length of time, and the length of time may be K x milliseconds, and the K Z time units may be included in x milliseconds, that is, the length of time may also be described as Z time units. Wherein, Z and K may be integers greater than or equal to 1, and x is greater than zero. Optionally, the x milliseconds may be 0.5 milliseconds (ms), that is, the CP configuration period may be 0.5 ms*K. Further, when the second wireless network device determines the CP type indicated by the CP configuration information, the second wireless network device may receive a message that is sent by the first wireless network device according to the CP configuration period, where the message is used to indicate the CP type.

In some possible implementations, the CP configuration information may include a CP configuration period and a CP type, where the unit of the first time unit is a first time unit; when the CP type is the first CP type, the CP configuration period is at least A first time unit; when the CP type is the second CP type, the CP configuration period is a predefined or signaling-based time length, and the length of the time may be K 0.5 milliseconds, which is not described here. Further, when the second wireless network device determines the CP type indicated by the CP configuration information, the second wireless network device may receive a message that is sent by the first wireless network device according to the CP configuration period, where the message is used to indicate the CP type.

Optionally, the message may be sent by the first wireless network device to the second wireless network device by using a second time unit, and the second infinite network device may be based on a first time unit included in a second time unit. The number, the identification of the second time unit in which the second time unit is located, the first offset parameter, and at least one of the CP configuration periods determine the second time unit. The time unit of the first time unit and the second time unit is the first time unit, and the length of one of the second time units is the same as the length of at least one of the first time units; the first offset parameter And an offset value indicating the second time unit in the CP configuration period or a second time unit.

Further optionally, the CP configuration information further includes a second offset parameter. The second wireless network device may determine the second offset parameter based on the identifier of the second time unit and the CP configuration period.

Further, the CP of the time unit included in the range before the CP configuration period corresponding to the next CP configuration information may be configured as the CP type CP indicated by the CP configuration information.

Further, the CP configuration period may be predefined, or the first wireless network device may notify the second wireless network device by using a signaling, which is not limited in this application.

In some possible implementations, the CP configuration information includes a CP type and a CP length, and the CP type is a second CP type; the CP length is based on a subcarrier spacing of the first time unit, an identifier of the first time unit, and The number of first time units included in a third time unit is determined. The time unit of the first time unit is a first time unit, and the third time unit includes at least one first time unit, that is, a length of the third time unit and at least one length of the first time unit. the same.

In some possible implementations, the CP configuration information includes a CP type, where the CP type is a first CP type or a second CP type, and the second wireless network device determines, according to the CP configuration information, a CP of the first time unit, which may be specific. The second wireless network device determines the CP of the first M symbols and/or the last N symbols of the first time unit as the CP of the CP type indicated by the CP configuration information; the second wireless network device uses the first time unit The CP of the remaining symbols is determined (such as may be determined based on a predefined or signaling configuration or an internal algorithm) as the CP of the first CP type or the second CP type, and the remaining symbols are the first time unit except the M and Symbols other than the N symbols. Wherein, the M and the N are integers greater than 0, and the sum of M and N is not greater than the total number of symbols included in the first time unit; the values of the M and N may be predefined or configured by signaling ( Obtained as the first wireless network device is notified to the second wireless network device by signaling.

Optionally, the CP type indicated by the CP configuration information is a first CP type; the second wireless network device determines a CP of the first M symbols and/or the last N symbols of the first time unit as the CP configuration information indication The CP of the CP type may be specifically: the second wireless network device determines the CP of the first M symbols and the last N symbols of the first time unit as the CP of the first CP type.

Optionally, the CP type indicated by the CP configuration information is a second CP type; the second wireless network device determines, by the CP of the first M symbols and/or the last N symbols of the first time unit, the CP configuration information indication. The CP of the CP type may be specifically: the second wireless network device determines the CP of the last N symbols of the first time unit as the CP of the second CP type.

In some possible implementations, the CP configuration information includes a CP type; the second wireless network device determines a CP of the first time unit based on the CP configuration information, and may be specifically: the second wireless network device indicates, according to the CP configuration information, The CP type determines the location of the first time unit; the second wireless network device determines the CP of the at least one symbol or the at least one channel in the first time unit corresponding to the location as the CP of the first CP type or the second CP type.

The CP type included in the CP configuration information may be predefined or configured through signaling.

In some possible implementations, the second wireless network device determines the CP of the first time unit based on the CP configuration information, where the second wireless network device determines, according to the CP configuration information, at least one symbol in the first time unit. Or CP of at least one channel.

In a third aspect, the present application further provides a wireless network device, where the wireless network device includes: a first determining module and a second determining module, where the wireless network device implements part of the CP determining method of the foregoing first aspect by using the foregoing module or All steps.

In a fourth aspect, the present application further provides a wireless network device, where the wireless network device includes: a first determining module and a second determining module, where the wireless network device implements part of the CP determining method of the second aspect by using the foregoing module or All steps.

In a fifth aspect, the present application further provides a computer storage medium storing a program, the program including some or all of the steps of the CP determining method of the first aspect described above.

In a sixth aspect, the present application further provides a computer storage medium storing a program, the program being executed including some or all of the steps of the CP determining method of the second aspect.

In a seventh aspect, the present application further provides a wireless network device, including: a communication interface, a memory, and a processor, wherein the processor is respectively connected to the communication interface and the memory; wherein

The memory is configured to store program instructions;

The processor is configured to invoke a program instruction in the memory to perform part or all of the steps of the CP determining method of the first aspect.

In an eighth aspect, the present application further provides a wireless network device, including: a communication interface, a memory, and a processor, wherein the processor is respectively connected to the communication interface and the memory; wherein

The memory is configured to store program instructions;

The processor is configured to invoke program instructions in the memory to perform some or all of the steps of the CP determining method of the second aspect above.

In a ninth aspect, the present application further provides a CP determining system, including a first wireless network device and a second wireless network device, wherein the first wireless network device is configured to perform the CP determining method of the first aspect above. Or all of the steps; the second wireless network device is configured to perform some or all of the steps of the CP determining method of the second aspect above.

In the technical solution provided by the present application, the wireless network device can perform CP configuration by determining CP configuration information such as a CP configuration period, a CP type, and/or a CP length, thereby enabling flexible configuration/switching of the CP type and avoiding borders. Alignment issues.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the drawings to be used in the embodiments of the present invention or the background art will be described below.

1 is a schematic diagram of a slot length of an NCP and an ECP according to an embodiment of the present invention;

2 is a structural diagram of a communication system according to an embodiment of the present invention;

3 is a schematic flowchart of a method for determining a CP according to an embodiment of the present invention;

4 is a schematic diagram of a configuration of switching an ECP to an NCP according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a configuration of switching an NCP to an ECP according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an ECP and an NCP according to an embodiment of the present invention; FIG.

Figure 6b is a configuration diagram of a CP according to an embodiment of the present invention;

FIG. 6c is another CP configuration diagram according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart diagram of another CP determining method according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a wireless network device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another wireless network device according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of still another wireless network device according to an embodiment of the present disclosure;

FIG. 11 is a schematic structural diagram of still another wireless network device according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

The "first", "second", etc. referred to in this application are used to distinguish different objects, and are not intended to describe a particular order. Moreover, the term "comprise" and any variants thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or modules is not limited to the listed steps or modules, but optionally includes steps or modules not listed, or alternatively Other steps or modules inherent to these processes, methods, products or equipment.

It should be understood that the technical solution of the present application can be specifically applied to various communication systems, for example, Global System of Mobile communication (abbreviation: "GSM"), code division multiple access (English: Code Division Multiple Access) , abbreviation: CDMA), Wideband Code Division Multiple Access (WCDMA), Time Division-Synchronous Code Division Multiple Access (English: Time Division-Synchronous Code Division Multiple Access, abbreviation: TD-SCDMA), Universal Mobile Telecommunication System (UMTS), Long Term Evolution (LTE) system, etc. With the continuous development of communication technologies, the technical solutions of the present application can also be used in the future. The network, such as the fifth generation mobile communication technology (English: The Fifth Generation Mobile Communication Technology, abbreviation: 5G) system, may also be called NR (English: New Radio, abbreviated: NR) system, D2D (device to device) system, M2M (machine to machine) system and so on.

The present application is described in connection with a wireless network device, which may be a base station or a terminal. For example, the communication involved in the embodiment of the present invention may be between the base station and the terminal, or between the base station and the base station, such as between the macro base station and the small base station, or between the terminal and the terminal. For example, communication in a D2D network.

In the present application, a terminal may refer to a wireless terminal or a wired terminal. The wireless terminal can be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem, which can be accessed via a radio access network (eg, RAN, radio access) Network) communicates with one or more core networks. For example, the terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, and can also be a portable, pocket, handheld, computer built-in or car-mounted mobile device, such as an individual. Communication service (English: Personal Communication Service; abbreviation: PCS) telephone, cordless telephone, session initiation protocol (English: Session Initiation Protocol; abbreviation: SIP) telephone, wireless local loop (English: Wireless Local Loop; abbreviation: WLL) station , Personal Digital Assistant (English: Personal Digital Assistant; PDA), etc., which exchange language and/or data with the wireless access network. Optionally, the terminal may also be called a user equipment (English: User Equipment, abbreviation: UE), a mobile station (English: Mobile Station, abbreviation: MS), a mobile terminal (mobile terminal), a subscriber unit (English: Subscriber) Unit; abbreviation: SU), subscriber station (English: Subscriber Station; abbreviation: SS), mobile station (English: Mobile Station; abbreviation: MB), remote station (English: Remote Station; abbreviation: RS), access point ( English: Access Point; abbreviation: AP), remote terminal (English: Remote Terminal; abbreviation: RT), access terminal (English: Access Terminal; abbreviation: AT), user terminal (English: User Terminal; abbreviation: UT), User agent (English: User Agent; abbreviation: UA), terminal device (English: User Device; abbreviation: UD), or user equipment (English: User Equipment; abbreviation: UE), etc., this application is not limited.

In the present application, a base station may refer to a device in an access network that communicates with a terminal over an air interface over one or more sectors, which may coordinate attribute management of the air interface. For example, the radio access network device may be a base station in GSM or CDMA, such as a base transceiver station (abbreviation: "BTS"), or a base station in WCDMA, such as a NodeB, or may be in LTE. The evolved base station, such as an eNB or an e-NodeB (evolutional Node B), may also be a base station in a 5G system, such as a Transmit Reception Point (TRP) or a g-Node B (g-NodeB, gNB), or a future. Base stations in the network, etc., are not limited in this application. Optionally, the base station may also be a relay device or other network element device with a base station function.

The following describes the application scenario of the present application. The application is described by taking the first wireless network device as the base station and the second wireless network device as the terminal, that is, the communication between the base station and the terminal is taken as an example. Referring to FIG. 2, FIG. 2 is a structural diagram of a communication system according to an embodiment of the present invention. Specifically, as shown in FIG. 2, the communication system includes a base station and a terminal, and various communication systems can be used for communication between the base station and the terminal, such as the 5G system in the above wireless communication system, which may also be referred to as an NR system, and Such as the LTE system, etc., thereby achieving information transmission.

A time unit is a unit corresponding to a time unit. The time unit refers to a time unit or a scheduling unit in the time domain for performing information transmission. The time unit includes an integer number of symbols in the time domain. For example, the time unit may refer to a subframe or a slot. It can also refer to a radio frame, a mini slot or a subslot, multiple aggregated time slots, multiple aggregated sub-frames, symbols, etc., and may also refer to a transmission time interval (English: Transmission Time Interval, abbreviation) :TTI), this application is not limited. Wherein one or more time units of one time unit may contain an integer number of time units of another time unit, or one or more time units of one time unit, the length of the time domain is equal to an integer number of another time The unit time unit length and, for example, one minislot/slot/subframe/radio frame contains an integer number of symbols, one slot/subframe/radio frame contains an integer number of minislots, one subframe/wireless The frame includes an integer number of time slots, a radio frame includes an integer number of subframes, and the like.

In the present application, the channel may also be called a signal or the rest of the name, which is not limited in this application. Its main functions are physical layer for base station and terminal, or base station and base station, or data transmission between terminal and terminal, or channel estimation or measurement. , or synchronization and other functions; the pilot can also be called the reference signal or the rest of the name, the application is not limited, its main function is the base station or terminal for channel estimation or measurement.

In this application, NCP and ECP mainly refer to two types of CPs with different CP overheads, where the ECP overhead is greater than the NCP, and the CP length for one subcarrier spacing ECP is greater than the CP length of the NCP. The present application is exemplified by NCP and ECP of LTE or 5G, and the scope of protection of the present application is also different when the lengths of NCP and ECP are different from the examples of the present invention.

In the present application, unless otherwise specified, the NCP symbol means that the CP type of the symbol is NCP, and the ECP symbol means that the CP type of the symbol is ECP. The NCP time slot or time slot is NCP, which means that the symbols in the time slot are all NCP symbols, and the ECP time slot or time slot is ECP means that the symbols in the time slot are all ECP symbols. Among them, the time slot is composed of an integer number of symbols.

In the present application, the identification of a time unit of a time unit may also be referred to as an index of a time unit or another name for distinguishing or marking or counting different time units of a time unit.

In the CP configuration, the delay spread of the channels of different terminals is different, or the modulation and coding strategies of different channels of different terminals or the same terminal (English: Modulation and Coding Scheme, abbreviation: MCS), or transmission mode, or The parameters of the BLER, or the maximum number of times of transmission required for the transmitted service are different, and the requirements for the CP type are different. Thus, the radio access network device can be at least one channel or at least one according to the time unit or the time unit. Symbols to configure the CP to meet different user needs.

In this application, the signaling may be high-level information, such as a broadcast message, a system message, a downlink message in an access process, a radio resource control (English: Radio Resource Control, abbreviation: RRC) signaling, or a media access control. : Media Access Control or Medium Access Control, abbreviation: MAC) CE (Control Element), or physical layer control signaling. Alternatively, the message may also be physical layer downlink control information (English: Downlink Control Information, abbreviated as DCI), etc., which is not limited in this application.

The present application discloses a CP determining method, a wireless network device, and a system, which can implement flexible configuration/switching of different CP types. The details are explained below.

Referring to FIG. 3, FIG. 3 is a schematic flowchart of a method for determining a CP according to an embodiment of the present invention. Specifically, as shown in FIG. 3, the method for determining a CP according to an embodiment of the present invention may include the following steps:

101. The first wireless network device determines CP configuration information, where the CP configuration information includes at least one of a CP configuration period, a CP type, and a CP length.

102. The first wireless network device determines a CP of the first time unit based on the CP configuration information.

The first wireless network device may be a base station or a terminal. The present application is described by taking a base station as an example.

In an optional embodiment, the CP configuration information may include a CP configuration period and a CP type, where the CP type may be a first CP type or a second CP type, and the CP configuration period is predefined or based on a letter. The length of time for the configuration may be K x x milliseconds, and the K time slots may include Z time units. The first CP type may be an NCP, and the second CP type may be an ECP, and the time unit may be a symbol/microslot/slot/subframe/radio frame (“/” is “or”). The Z and K may be integers greater than or equal to 1. Optionally, the x is greater than 0, such as x milliseconds may be 0.5 milliseconds. That is, if the time zone corresponding to the first CP type is included in the time zone corresponding to the length of the time zone corresponding to the CP configuration period, the time unit of the first CP type is included, that is, none. The time unit of the first CP type spans (exceeds) the start position and the end position (ie, the boundary) of the length of the time domain; if all the time domain lengths corresponding to the CP configuration period are all time units of the second CP type, An integer number of time units of the second CP type, that is, a time unit without the second CP type, spans the start position and the end position of the length of the time domain, and a space is allowed in the time domain length. Further, if there is no vacancy in the length of the time domain, the total length of the time unit of the first CP type corresponding to the CP configuration period is the same as the total length of the time unit of the second CP type corresponding to the CP configuration period. .

Further, after the base station determines the CP configuration period and the CP type, the terminal may further send a message for determining the CP type to the terminal according to the CP configuration period. It can be understood that the base station sends a message for determining the type of the CP to the terminal with the CP configuration period as the time granularity. The CP configuration period may be predefined or signaled, and the CP type may be the message display indication or implicitly determined according to the remaining information carried by the message. The display indication may indicate that the message indicates the CP type by carrying a CP type indication information bit.

Further optionally, the base station may send the message to the terminal by using the second time unit. The time unit of the first time unit and the second time unit is a first time unit, such as the time slot described above; the second time unit may be based on a first time unit included in a second time unit. The number, the first offset parameter, and at least one of the CP configuration periods are determined; a second time unit includes an integer number of first time units, or an integer number of first time units equal to one second The length of the time unit, such as the second time unit, may be a subframe or a radio frame. Further, the unit of the first offset parameter may be a first time unit or a remaining time unit, which is not limited in the application, and the first offset parameter may be predefined or configured by signaling, which may be used to determine An offset value of the second time unit within the CP configuration period or a second time unit. Further, the first offset parameter may be 0.

Further optionally, the CP configuration information may further include a second offset parameter, which may be notified according to a predefined value or a predefined rule or signaling. Optionally, the second offset parameter may also be determined based on the identifier of the second time unit and the CP configuration period.

For example, as shown in FIG. 1 , at 60 kHz subcarrier spacing, when all symbols in the time slot are NCP symbols, 7 symbols are included, and when all symbols in the time slot are ECP symbols, 6 symbols are included as an example, and each 0.5 ms includes 4 symbols. The time slot, the NCP time slot and the ECP time slot are aligned every 0.5 ms boundary, so that the configuration period can be set to 0.5 ms*K. That is to say, the base station can perform CP configuration with a period of 0.5 ms*K, and the CP type (which can be a symbol or a channel or a CP of all symbols in a time slot) in 0.5 ms*K is the same, thereby avoiding borders. The problem of alignment enables flexible configuration or switching of CP types. Where K is a positive integer greater than or equal to 1. Specifically, the base station may send a message to the terminal through the downlink control/data channel in the time slot n1 (ie, the second time unit), where the message is used to determine at least one symbol or time slot in the time slot n2 (ie, the first time unit). The CP type of the symbol corresponding to at least one uplink and/or downlink channel/signal of n2 (which may be greater than or equal to a different downlink channel). Optionally, n1 may be n1 that satisfies ((n_subfram_slot*n_subframe)+n1-n_offset)mod(n_period)=0. Where n_subfram_slot is the number of slots included in each subframe (the value may be different for different subcarrier spacings); n_subframe is the subframe number corresponding to n1; n_offset is the upper layer signaling or a pre-configured offset slot. The value range is 0-n_subfram_slot-1, which is the first offset parameter mentioned above; n_period is the number of time slots (ie, the first time unit) included in the CP configuration period, that is, within 0.5ms*K. The number of slots included.

Further, n2=n1+L, where L is the second offset parameter, and L is an integer greater than or equal to 0, the L is a predefined value, or a value obtained based on a predefined rule, or passed Signaling configured. Further, when the value of n1 starts from Y (Y is an integer greater than or equal to 0, such as 0), L is a value that satisfies ((n_subfram_slot*n_subframe)+n1+L)mod(n_period)=0, or n2 is After n1, the system corresponds to the identifier corresponding to the first time slot of the next 0.5ms*N. The descriptions of n_subfram_slot, n_subframe, and n_period are the same as the previous paragraph, and are not described here.

Further, optionally, the CPs of the time units included in the range of the CP configuration period to the time before the CP configuration period corresponding to the next CP configuration information may also be configured as CPs of the CP type indicated by the CP configuration information. That is to say, the CP type of all time slots in the previous time slot from n2 corresponding to the next time receiving the CP configuration signaling may be the same as the CP type of the current n2 time slot. The periodic CP configuration is implemented with low system overhead.

Optionally, the message may be high-level information, such as a broadcast message, a system message, a downlink message in the access process (such as message 2 or message 4), and radio resource control (English: Radio Resource Control, abbreviation: RRC) signaling. , or media access control (English: Media Access Control or Medium Access Control, abbreviation: MAC) CE (Control Element). Alternatively, the message may also be a physical layer downlink control information (English: Downlink Control Information, abbreviated as DCI), that is, the CP configuration information may be carried by a physical channel, the physical channel may be a physical downlink control channel, etc., the application does not Make a limit.

Further, the base station determines, according to the CP configuration information, the CP of the first time unit, where the base station determines, according to the CP configuration information, the CP of the at least one channel in the first time unit. That is to say, when the base station performs CP configuration based on the determined CP configuration information, the CP may be configured (or switched) only for some channels in the time slot, and the CP types of the remaining channels may be predefined. For example, the base station can configure the data channel and the CP of the demodulation reference signal to be configured as the first CP type or the second CP type, and the CP types of the remaining channels are predefined as the first CP type or the second CP type (predefined types of different channels) Can be different).

In the embodiment of the present invention, the base station can perform the CP configuration by determining the CP configuration period and the CP type, so that the CP types in each CP configuration period, such as 0.5 ms*K, are the same, thereby avoiding the problem of boundary misalignment and achieving 0.5. Flexible configuration/switching of the CP type of the ms level. Further, since the current time slots of different CP types are 0.5 ms*K boundary alignment instead of per-slot boundary alignment, the number of CP handovers is reduced, and each time slot is not required to send a message indicating CP configuration information, which is reduced. The number of messages in the system, thereby reducing system signaling overhead.

In an optional embodiment, the CP configuration information may include a CP configuration period and a CP type, and the CP type may be a first CP type or a second CP type. Specifically, the base station may determine the CP configuration period according to the CP type. The unit of the first time unit may be the first time unit.

Optionally, the CP type is the first CP type, that is, when the NCP is the NCP, the CP configuration period is at least one of the first time units (such as a symbol/slot/subframe); the CP type is the second CP. The type, that is, the ECP, the CP configuration period is a predefined or signaling-based configured length of time, which may be K x milliseconds, and the K x milliseconds may include Z time units. The time unit may be a symbol/slot/subframe, and the Z and K may be integers greater than or equal to 1, and x is greater than 0, for example, may be 0.5. Therefore, the base station can configure the CP of the time unit in the CP configuration period in which the first time unit is located as the CP type CP indicated by the CP configuration information.

For the configuration of the CP and the method for determining the CP, refer to the related description of the foregoing embodiment, and details are not described herein again. The following mainly describes the CP configuration and determination method when the CP type is NCP.

Further optionally, the base station may send the message to the terminal by using the second time unit. The time unit of the first time unit and the second time unit is a first time unit, such as the time slot described above; the second time unit may be based on a first time unit included in a second time unit. The number, the first offset parameter, and at least one of the CP configuration periods are determined; a second time unit includes an integer (greater than or equal to 1) first time units, or an integer number of first time units And equal to the length of a second time unit, such as the second time unit may be a subframe or a radio frame. Further, the unit of the first offset parameter may be a first time unit or a remaining time unit, which is not limited in the application. The first offset parameter may be predefined or configured by signaling, and its function is an indication. An offset value of the second time unit within the CP configuration period or a second time unit. Further, the first offset parameter may be 0.

Further optionally, the CP configuration information may further include a second offset parameter, which may be predefined or signaled, or may be determined based on the identifier of the second time unit and the CP configuration period.

Specifically, by analyzing the slot lengths of the NCP and the ECP, when the slot boundaries are not aligned, the slot portion of a part of the NCP exceeds the start of the ECP when the switch is switched from the NCP to the ECP. Switch from NCP to ECP. Therefore, when it is required to switch from the ECP to the NCP, the embodiment of the present invention can directly use an integer number of time slots as the configuration period, thereby enabling flexible switching of the ECP to the NCP.

For example, the base station may send a message to the terminal through the downlink control/data channel in slot n1 (ie, the second time unit), the message being used to determine slot n2 (ie, the first time unit) or at least one uplink of slot n2. The CP corresponding to the downlink channel/signal (which may be greater than or equal to a different downlink channel) is configured as an NCP. Optionally, n1 may satisfy ((n_subfram_slot*n_subframe)+n1-n_offset) mod(n_period)=0 to determine the n1. The n_period is a CP configuration period, which may be an integer number of time slots. For other parameters, refer to the related description of the foregoing embodiment, and details are not described herein.

Further, n2=n1+L, L is an integer greater than or equal to 0, and the L value may be predefined or configured by signaling. That is to say, n2 may be the number of the slot of the L slot corresponding to the slot corresponding to n1. When L=0, n2 is the same time slot of time slot n1. Further, optionally, the CPs of the time units included in the range of the CP configuration period to the time before the CP configuration period corresponding to the next CP configuration information may also be configured as CPs of the CP type indicated by the CP configuration information. That is to say, the CP type of all time slots in the previous time slot from the current time slot n2 to the next time n2 corresponding to the CP configuration signaling is the same as the CP type of the current n2 time slot.

Further, when there are both NCP and ECP in a period of time, such as 0.5 ms, the time slot/symbol time domain position of the NCP and the time slot in the time period are the same as the time slot/symbol time domain position of the NCP symbol, ECP The time slot/symbol time domain position and the symbol in the time period are the same as the time slot/symbol time domain position when the ECP symbol is used. Among them, the time slot is composed of an integer number of symbols.

Optionally, the message may be a high-level information, a control information, or the like. For details, refer to the description of related messages in the foregoing embodiment, and details are not described herein.

For example, as shown in FIG. 4, it is a schematic diagram of a CP configuration in which an ECP is switched to an NCP according to an embodiment of the present invention, which can implement ECP to NCP switching in different time slots within 0.5 ms. Within 0.5ms, the time slot/symbol time domain position of the NCP and the time slot/symbol time domain position when the NCP symbol is both in the time period are the same, and the time slot/symbol time domain position of the ECP and the time period are ECP. The time slot/symbol time domain position at the time of the symbol is the same. Further, when switching from the ECP to the NCP, additional resources in the ECP time slot and the NCP time slot may be used to implement functions such as protection period, beam switching, measurement, etc. Further, the part of the additional resources may also be attributed to the ECP. The time slot or the NCP time slot is not limited in the embodiment of the present invention.

In the embodiment of the present invention, when switching from the ECP to the NCP, the base station can use the time slot as the configuration period to implement the CP type switching at the time slot level, thereby avoiding the problem of border misalignment, which improves the flexibility of the CP configuration. Sex.

In an optional embodiment, the CP configuration information includes a CP type and a CP length, and the CP type is a second CP type; the CP length may be a subcarrier spacing of the base station according to the first time unit, the first time unit The identifier and the number of time units corresponding to the first time unit included in the third time unit are determined. The time unit of the first time unit is a first time unit, and a third unit in the time domain includes an integer number of the first time unit, or an integer number of the first time unit in the time domain is equal to one of the first time units The length of the three time unit. For example, the first time unit may be the above time slot, and the third time unit may be 0.5 ms*K or P time slots, where K and P are integers greater than or equal to 1.

Specifically, by analyzing the slot lengths of the NCP and the ECP, when the slot boundaries are not aligned, the slot portion of a part of the NCP exceeds the start of the ECP when the switch is switched from the NCP to the ECP, so that the slot cannot be normal. Switch from NCP to ECP. The embodiment of the present invention can directly use an integer number of time slots as a configuration period to implement flexible switching of the CP type, including switching from NCP to ECP, or switching from ECP to NCP. For the scenario where the NCP is switched to the ECP, the current time slot is ECP, and the previous time slot of the current time slot in the time domain is NCP, that is, when the NCP needs to be switched from the NCP to the ECP. The length of the slot is not shorter than the partial CP or symbol length of the ECP slot covered by the NCP slot, that is, at least according to the subcarrier spacing of the current slot, the slot number, and the number of slots included in each configuration period, such as 0.5 ms. One determines the length of the CP. Optionally, the sub-carrier spacing of the current time slot and the previous time slot of the current time slot may be the same or different, which is not limited in the embodiment of the present invention.

The following is an example of a carrier frequency below 60 kHz (ie, subcarrier spacing), a 20 MHz bandwidth, and a sampling rate of 30.72 MHz (taking one Ts as a sampling point). In the NCP type, the symbol length and CP length corresponding to each subcarrier spacing are as follows: One:

Table I

Similarly, the carrier frequency below 60 kHz (ie, subcarrier spacing), the 20 MHz bandwidth, and the sampling rate of 30.72 MHz (taking one Ts as one sampling point) as an example. In the ECP type, the symbol length and CP length corresponding to each subcarrier spacing are as follows: Second:

Table II

As shown in Figure 5, with {60kHz subcarrier spacing, 20MHz bandwidth, 30.72MHz sampling rate, Table 1 and Table 2 NCP and ECP configurations} as an example, the following are different time slots in 0.5ms from NCP to ECP. The determined ECP length, where N_sot is the number of slots included every 0.5 ms (N_sot=4 in Fig. 5, respectively slot0, slot1, slot2, slot3), and the identifier of the current slot is recorded as n:

When (n) mod N_sot = 0, the CP length of the first symbol of the ECP is 128Ts. It can be seen from Table 2 above that 128 is equal to the CP length of the original ECP. That is to say, when the time slot n to be switched is the first time slot within 0.5 ms, that is, slot 0, the CP configuration is performed with the original length of the ECP. Further, before the next CP type switching, the ECP of the remaining time slots is configured with the original length, for example, the CP length of slot 1, slot 2, and slot 3 is 128 Ts (corresponding to the time slot length of 0.125 ms).

When (n) mod N_sot = a (a = 1), the CP of the first symbol of the ECP has a length of 116 Ts (corresponding to the slot length of about 0.12461 ms). Wherein, 116=128-16/N_sot*(N_sot-a), 128 is equal to the CP length of the original ECP corresponding to 60 kHz, and 16=the sampling rate is *16/30.72 MHz. That is to say, when the time slot n that needs to be switched from the NCP to the ECP is the second time slot within 0.5 ms, that is, slot 1 (slot 0 is NCP), the CP configuration is performed at 116 Ts, that is, the CP length of 12 Ts needs to be destroyed. Further, before the next CP type switching, the ECP of the remaining time slots is configured with the original length, and the CP length of slot 2 and slot 3 is 128 Ts.

When (n) mod N_sot = a (a = 2), the CP of the first symbol of the ECP has a length of 120 Ts. Where 120=128-16/N_sot*(N_sot-a), 128 is equal to the CP length of the original ECP corresponding to 60 kHz, and 16=sampling rate *16/30.72 MHz. That is to say, when the time slot n that needs to be switched from the NCP to the ECP is the third time slot within 0.5 ms, that is, slot 2, the CP configuration is performed at 120 Ts, that is, the CP length of 8 Ts needs to be cancelled. Further, before the next CP type switching, the ECP of the remaining time slots is configured with the original length, and the CP length of the slot 3 is 128 Ts.

When (n) mod N_sot = a (a = 3), the CP length of the first symbol of the ECP is 124 Ts. Wherein, 124=128-16/N_sot*(N_sot-a), 128 is equal to the CP length of the original ECP corresponding to 60 kHz, and 16=the sampling rate is *16/30.72 MHz. That is to say, when the time slot n to be switched from the NCP to the ECP is the fourth time slot in the 0.5 ms, that is, the slot 3, the CP configuration is performed at 124 Ts, that is, the CP length of 4 Ts needs to be cancelled.

Optionally, when switching from the NCP to the ECP, the base station may use the length of the CP obtained by the preset rule as the length of the CP of the first time unit, where the CP length obtained by the preset rule is the shortest ECP in all the switching scenarios. The length, the first time unit may be a time unit corresponding to the first ECP after the handover. Therefore, whether the CP length of the first time unit after switching can be configured to the same value reduces the design complexity. For another example, the {60 kHz subcarrier spacing, the 20 MHz bandwidth, the 30.72 MHz sampling rate, the NCP and ECP configurations of Tables 1 and 2} are taken as an example, and the different time slots in 0.5 ms are switched when switching from NCP to ECP. ECP length, where N_sot is the number of slots included every 0.5 ms (N_sot=4 in Figure 5, respectively slot0, slot1, slot2, slot3), the current slot is ECP and the slot identifier is recorded as n, current When the previous time slot of the time slot is an NCP, the CP length of the first symbol of the current time slot is determined according to the subcarrier spacing. That is, in order to simplify the design, the length of the ECP of the first symbol in the above four cases may be the same, for example, all are 116Ts, that is, the shortest ECP length among the above four types is selected.

For another example, the {60 kHz subcarrier spacing, the 20 MHz bandwidth, the 30.72 MHz sampling rate, the 0.5 ms including 2 slots, and the NCP and ECP configurations of Table 1 and Table 2 are taken as an example, and the following is the case that the ECP is different within 0.5 ms. The length of the CP when the slot is switched from NCP to ECP, that is, the current slot n is ECP, and the previous slot of the current slot is NCP:

When (n) mod N_sot = 0, the CP length of the first symbol of the ECP is 128Ts. Among them, 128=128-16/N_sot*(N_sot-0), 16=sampling rate*16/30.72MHz, 128 is the original CP length of the ECP corresponding to 60kHz.

When (n) mod N_sot = a (a = 1), the CP of the first symbol of the ECP has a length of 120 Ts. Among them, 116=128-16/N_sot*(N_sot-a), 16=sampling rate*16/30.72MHz, 128 is the original CP length of the ECP corresponding to 60kHz.

For another example, the {30 kHz subcarrier spacing, 20 MHz bandwidth, 30.72 MHz sampling rate, 0.5 ms includes 2 time slots, and the NCP and ECP configurations of Table 1 and Table 2 are taken as an example. The following is the case that the ECP is different within 0.5 ms. The length of the CP when the slot is switched from NCP to ECP, that is, the current slot n is ECP, and the previous slot of the current slot is NCP:

When (n) mod N_sot = 0, the CP of the first symbol of the ECP has a length of 256Ts. Where 256=256-16/N_sot*(N_sot-0), 16=sampling rate*16/30.72MHz, 256 is the original CP length of the ECP corresponding to 60kHz.

When (n) mod N_sot = a (a = 1), the CP of the first symbol of the ECP has a length of 248Ts. Among them, 248=256-16/N_sot*(N_sot-a), 16=sampling rate*16/30.72MHz, 256 is the original CP length of the ECP corresponding to 60kHz.

In the embodiment of the present invention, the base station can implement the slot level switching of the NCP to the ECP by configuring the CP length of the ECP, thereby avoiding the problem that the CP type switching cannot be switched due to the boundary misalignment.

In an optional embodiment, the CP configuration information may include a CP type, where the CP type is a first CP type or a second CP type. And determining, by the base station, the CP of the first time unit, where the base station configures, by the base station, the first M symbols of the first time unit and/or the CP of the last N symbols as the CP type determined by the CP configuration information. The CP transmits the CP of the remaining symbols in the first time unit to the CP of the first CP type or the second CP type. The remaining symbols are symbols other than the M and N symbols in the first time unit, where M and N are integers greater than 0, and the sum of M and N is not greater than the symbol included in the first time unit. The total number of.

Optionally, the CP type determined by the CP configuration information may be a first CP type, that is, an NCP. The base station configures the CPs of the first M symbols and/or the last N symbols of the first time unit as the CP of the CP type determined by the CP configuration information, which may be specifically: the base station sets the first M symbols of the first time unit. The CP of the last N symbols is configured as a CP of the first CP type.

That is to say, one slot can be all NCP symbols or include NCP and ECP symbols. The first M symbols and the last N symbols in one slot are fixed NCP symbols, and the values of the M and N may be predefined (such as 1 or 2, M and N may be independently configured) or configured by base station signaling. get. The remaining symbols may be NCP or ECP, and the CP type of the remaining symbols may be determined by a predefined or signaling configuration.

Optionally, in one time slot, the symbol information such as the symbol length, the symbol position, the symbol number, and the slot number of the NCP may be determined according to the NCP symbol information, that is, the symbol information and the symbol when all the NCP symbols in the time slot are used. The information is the same; the symbol information such as the symbol length, the symbol position, the symbol number, and the slot number of the ECP may be determined according to the ECP symbol information, that is, the symbol information is the same as the symbol information when all the ECP symbols are in the slot.

For example, as shown in FIG. 6a, it is a schematic diagram of symbol comparison of ECP and NCP provided by an embodiment of the present invention. When all time slots are ECP symbols, one time slot includes six symbols, and the numbers are respectively 0. -5; When all slots in the slot are NCP symbols, one slot includes 7 symbols, numbered 0-6. Further, as shown in FIG. 6b, if both M and N are taken as 1, the base station can fix the CP of the previous symbol and the latter symbol in the slot to the NCP, that is, take the symbols 0 and 6 of the NCP configuration as the NCP. A fixed-CP type symbol whose symbol number is the same as the symbol number when all the slots in the slot are NCP; the CP types of the remaining symbols can be arbitrarily configured as NCP or ECP, for example, all configured as ECP, as shown in FIG. 6b, and the remaining symbols include Symbols 1-4 configured as ECP, the symbol number of which is the same as the symbol number when all the ECP symbols in the time slot are used. Therefore, the length of the fixed time slot can be realized by the NCP of the fixed time slot and the type of the last N symbols being NCP, thereby solving the problem of boundary misalignment when the CP type is switched.

Further, since the MCS of some physical channels, such as the control channel, is relatively low, even in the case of a large delay spread scenario, the short CP does not cause a significant performance degradation. Therefore, the symbols corresponding to the M and N can also be used. On different channels, different symbols within a time slot are used for different channels. For example, the first M symbols may be included for the downlink control channel, the last N symbols included for the uplink control channel, and the remaining symbols included for the data channel.

Optionally, the CP type indicated by the CP configuration information may also be a second CP type, that is, an ECP. The base station configures the CPs of the first M symbols and/or the last N symbols of the first time unit as the CP of the CP type indicated by the CP configuration information, which may be specifically: the base station will use the last N symbols of the first time unit. The CP is configured as a CP of the second CP type.

That is, one time slot can be all ECP symbols or include NCP and ECP symbols. The last N symbols in a time slot are fixed ECP symbols, and the value of the N may be predefined or configured by base station signaling. The remaining symbols may be an NCP or an ECP. Specifically, the CP type of the remaining symbols may be determined by a predefined or signaling configuration. Symbol information such as symbol length, symbol position, symbol number, and slot number in a slot is corresponding according to the symbol. The symbol information of the CP type is determined, that is, the symbol information is the same as the symbol information when all the symbols in the time slot are the CP type symbols, and details are not described herein.

Optionally, the introduction of the ECP may be that the CP is sensitive to a high MCS in a large-delay extended scenario, that is, the CP cannot cover the delay requirement and the performance is significantly reduced when the MCS is high, and the data channel is mainly used for the high MCS. It is not necessary to configure each channel in one slot or all symbols corresponding to one channel as ECP. For example, as shown in FIG. 6c, please refer to FIG. 6a together. If N is set to 1, the base station can fix the CP of the last symbol in the slot to the ECP, that is, the symbol 5 in the ECP configuration is taken as the fixed CP. The symbol of the type has the same symbol number as that of the ECP only; the CP type of the remaining symbols can be arbitrarily configured, for example, all configured as NCP, and the remaining symbols include the symbols 0-4 configured as NCP, the symbol number and only The symbol numbers are the same when NCP. Therefore, the fixed time slot length can be realized by the type of N symbols after the fixed time slot is ECP, thereby solving the problem of boundary misalignment when the CP type is switched.

Further optionally, the N symbols are available for the uplink control channel.

In the embodiment of the present invention, the base station can fix the CP type of several symbols, so that the length of the time slot has only one type, and there is no case where the lengths of the NCP time slot and the ECP time slot are different, thereby solving the boundary of the CP type switching. The problem of misalignment can further meet the performance requirements of service data transmission by configuring the CP type of the remaining symbols in the slot.

In an optional embodiment, the CP configuration information may include a CP type, where the CP type is a first CP type or a second CP type. The base station determines the CP of the first time unit based on the CP configuration information, where the base station determines, according to the CP type indicated by the CP configuration information, the location of the first time unit, that is, the first time unit is the CP type time unit. That is, the location of the first time unit is the same as the location of the CP type symbol in the time unit; the base station configures the CP of the symbol included in the first time unit as the first CP type or the second CP type. The CP, in which the CPs of different symbols can be different or the same, is not limited in this application. Optionally, the location may be a slot location, where the slot location of the first time unit may be a slot location of the CP type indicated by the base station according to the CP configuration information (all corresponding to the CP type symbol in the time domain) The slot position) and the slot length of the CP type are determined.

Further, since the ECP is mainly used in a large delay spread scenario and a high MCS application scenario, the transmission performance of the NCP and the ECP is not much different, and the data transmission conforming to the feature is mainly used for transmitting the user-level data channel. . For the synchronization signal, the broadcast channel, the data channel of the transmission system or the common message, the control channel, the access channel, and even the pilot channel or the reference signal, one or more of the channels may have no NCP and ECP because of their low MCS. Switching, using only one CP type can meet the performance requirements. That is, it is not necessary to configure/switch the CP type for all resources in one slot. Therefore, the base station can configure the symbols in the first time unit to be the first CP type or the second CP type by using a pre-defined or signaling configuration. The CP types of different symbols may be different or the same, and the application does not. Limiting, or configuring at least one channel in the first time unit as a first CP type or a second CP type by a predefined or signaling configuration (the CP types of different channels may be different).

Optionally, the CP type determined by the CP configuration information may be a first CP type, that is, an NCP. Then, the base station can determine the slot position of the first time unit according to the slot length and position when all the NCP symbols in the time domain are in the time domain. Further, the base station may configure, by using a predefined or signaling configuration, the symbol in the first time unit determined by the slot position as the first CP type or the second CP type, or configure the time unit by using a predefined or signaling configuration. At least one of the channels is configured as a first CP type or a second CP type (the CP types of different channels may be different).

Optionally, the CP type determined by the CP configuration information may be a second CP type, that is, an ECP. Then, the base station can determine the slot position of the first time unit according to the slot length and position when all the ECP symbols in the time domain are in the time domain. Further, the base station may configure, by using a predefined or signaling configuration, the symbol in the first time unit determined by the slot position as the first CP type or the second CP type, or configure the time unit by using a predefined or signaling configuration. At least one of the channels is configured as a first CP type or a second CP type (the CP types of different channels may be different).

Optionally, since the MCS of the control channel is relatively low, even in a large delay spread scenario, the short CP does not cause a significant performance degradation. Therefore, the control channel or the synchronization channel or the broadcast channel in the first time unit may also be used. Configured as NCP, configure the data channel or pilot channel as ECP.

In the embodiment of the present invention, the base station may fix the number of the CP type or the fixed time slot of the plurality of symbols, so that the length of the time slot has only one type, and there is no case where the lengths of the NCP time slot and the ECP time slot are different, thereby The problem of boundary misalignment when the CP type is switched is solved, and the performance of the service data transmission can be further satisfied by configuring the CP type of the remaining symbols in the time slot.

Referring to FIG. 7, FIG. 7 is a schematic flowchart of another method for determining a CP according to an embodiment of the present invention. Specifically, as shown in FIG. 7, the method for determining a CP according to an embodiment of the present invention may include the following steps:

201. The second wireless network device determines CP configuration information, where the CP configuration information includes at least one of a CP configuration period, a CP type, and a CP length.

202. The second wireless network device determines, according to the CP configuration information, a CP of the first time unit.

The second wireless network device may be a terminal or a base station. The present application is described by taking a terminal as an example.

In an optional embodiment, the CP configuration information may include a CP configuration period and a CP type, where the CP configuration period is a predefined or signaling-based configured time length, and the time length may be K x milliseconds, and the K Z time units may be included within x milliseconds, which may be symbols/microslots/slots/subframes/radio frames, and the like. Wherein, Z and K may be integers greater than or equal to 1. Optionally, the x is greater than 0, and the x millisecond may be 0.5 milliseconds.

In an optional embodiment, the CP configuration information may include a CP configuration period and a CP type, where the unit of the first time unit is a first time unit; when the CP type is the first CP type, the CP configuration period may be At least one first time unit; when the CP type is the second CP type, the CP configuration period is a predefined or signaling-based time length, and the length of the time may be K 0.5 milliseconds, which is not described herein. .

Further, the manner in which the terminal determines the CP type indicated by the CP configuration information may be that the terminal receives a message sent by the base station according to the CP configuration period, where the message is used to indicate the CP type. The CP configuration period may be predefined or sent by the base station to send a signaling, and the CP type may be the message display indication or implicitly determined according to the remaining information carried by the message. The display indication may indicate that the message indicates the CP type by carrying a CP type indication information bit.

Specifically, the manner in which the terminal determines the CP configuration information and determines the CP of the first time unit based on the CP configuration information may refer to the foregoing base station determining the CP configuration information, and determining, according to the CP configuration information, a description of the CP of the first time unit, where Do not repeat them. Therefore, the terminal and the base station can perform CP determination by determining CP configuration information such as the CP configuration period, the CP type, and/or the CP length, so as to implement flexible configuration/switching of the CP type and avoid the problem of boundary misalignment.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of a wireless network device according to an embodiment of the present invention. Specifically, as shown in FIG. 8, the wireless network device in the embodiment of the present invention may include a first determining module 11 and a second determining module 12. among them,

The first determining module 11 is configured to determine CP configuration information, where the CP configuration information includes at least one of a CP configuration period, a CP type, and a CP length;

The second determining module 12 is configured to determine a CP of the first time unit based on the CP configuration information.

In an optional embodiment, the CP configuration information includes a CP configuration period and a CP type, where the CP configuration period is a predefined or signaling-based configured time length, and the time length may be K x milliseconds. Z time units can be included in K x milliseconds. Wherein, Z and K may be integers greater than or equal to 1. Optionally, the x is greater than 0, and the x millisecond may be 0.5 milliseconds.

In an optional embodiment, the CP configuration information includes a CP configuration period and a CP type, where the unit of the first time unit is a first time unit; when the CP type is a first CP type, the CP The configuration period is at least one of the first time units; when the CP type is the second CP type, the CP configuration period is a predefined or signaling-based time length, such as K 0.5 milliseconds, where Do not repeat them.

Further optionally, the wireless network device may further include:

The communication module 13 is configured to send a message to another wireless network device according to the CP configuration period, where the message is used to indicate the CP type.

The message may be sent by the wireless network device to the another wireless network device by using a second time unit, and the second time unit is based on the number of first time units included in a second time unit. And determining at least one of a first offset parameter and the CP configuration period. The time unit of the first time unit and the second time unit is the first time unit, and one of the second time units includes at least one of the first time units; And determining an offset value of the second time unit in the CP configuration period or in a second time unit.

Further, optionally, the CP configuration information further includes a second offset parameter, where the second offset parameter is determined based on at least one of an identifier of the second time unit and the CP configuration period. Or the second offset parameter may also be predefined or configured by signaling.

Further, optionally, the CP of the time unit included in the range of the CP configuration period to the CP configuration period corresponding to the next CP configuration information is configured as the CP type CP indicated by the CP configuration information.

In an optional embodiment, the CP configuration information includes a CP type and a CP length, and the CP type is a second CP type; the CP length is based on a subcarrier spacing of the first time unit, the first The identification of the time unit and the number of first time units included in a third time unit are determined. The time unit of the first time unit is a first time unit, and one of the third time units includes at least one of the first time units.

In an optional embodiment, the CP configuration information includes a CP type, and the CP type is a first CP type or a second CP type. The second determining module 12 is specifically configured to:

Configuring a CP of the first M symbols and/or the last N symbols of the first time unit as a CP of the CP type indicated by the CP configuration information; wherein the M and N are integers greater than 0, and M and The sum of N is not greater than the total number of symbols included in the first time unit;

And configuring a CP of the remaining symbols in the first time unit as the CP of the first CP type or the second CP type, where the remaining symbols are in the first time unit except the M and the N Symbols other than symbols.

Optionally, the CP type indicated by the CP configuration information is a first CP type, and the second determining module 12 is configured to perform CP configuration of the first M symbols and/or the last N symbols of the first time unit. When the CP of the CP type indicated by the CP configuration information is used, the CP of the first M symbol and the last N symbols of the first time unit is configured as a CP of the first CP type.

Optionally, the CP type indicated by the CP configuration information is a second CP type, and the second determining module 12 performs the configuring, by using the CP of the first M symbols and/or the last N symbols of the first time unit as When the CP of the CP type indicated by the CP configuration information is used, the CP of the last N symbols of the first time unit is configured as a CP of the second CP type.

In an optional embodiment, the CP configuration information includes a CP type, and the second determining module 12 is specifically configured to:

Determining a location of the first time unit based on a CP type indicated by the CP configuration information;

The symbol in the first time unit corresponding to the location or the CP of the at least one channel is configured as a CP of the first CP type or the second CP type.

Further optionally, the second determining module 12 is specifically configured to:

Determining a CP of at least one channel within the first time unit based on the CP configuration information.

That is, the CP configuration information can be used to determine a CP configuration of at least one symbol or a channel within the first time unit.

The wireless network device may be a base station or a terminal; the other wireless network device may be a terminal or a base station. Optionally, the wireless network device may implement some or all of the steps performed by the base station in the CP determining method in the foregoing embodiments of FIG. 3 to FIG. 7 through the foregoing modules. It should be understood that the embodiments of the present invention are device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present invention.

Referring to FIG. 9, FIG. 9 is a schematic structural diagram of another wireless network device according to an embodiment of the present invention. Specifically, as shown in FIG. 9, the wireless network device in the embodiment of the present invention includes a first determining module 21 and a second determining module 22. among them,

The first determining module 21 is configured to determine CP configuration information, where the CP configuration information includes at least one of a CP configuration period, a CP type, and a CP length;

The second determining module 22 is configured to determine a CP of the first time unit based on the CP configuration information.

In an optional embodiment, the CP configuration information includes a CP configuration period and a CP type, where the CP configuration period is a preset time length, and the unit of the first time unit is a first time unit, and the preset The time length includes at least two of the first time units; the first determining module 21 may be specifically configured to: when determining the CP type:

Receiving a message sent by another wireless network device according to the CP configuration period, the message being used to indicate the CP type.

In an optional embodiment, the CP configuration information includes a CP configuration period and a CP type, where the unit of the first time unit is a first time unit;

When the CP type is the first CP type, the CP configuration period is at least one of the first time units;

When the CP type is the second CP type, the CP configuration period is a preset time length, and the preset time length includes at least two of the first time units;

The first determining module 21 may be specifically configured to: when determining the CP type:

The wireless network device may be a terminal or a base station; the other wireless network device may be a base station or a terminal.

Optionally, the message may be sent by the wireless network device to the another wireless network device by using the second time unit, and the second unlimited network device may be based on the number of the first time units included in a second time unit. And identifying, by the at least one of the identifier of the second time unit in which the second time unit is located, the first offset parameter, and the CP configuration period. The time unit of the first time unit and the second time unit is the first time unit, and the length of one of the second time units is the same as the length of at least one of the first time units; the first offset parameter And an offset value indicating the second time unit in the CP configuration period or a second time unit.

Further optionally, the CP configuration information further includes a second offset parameter. The wireless network device may determine the second offset parameter based on the identifier of the second time unit and the CP configuration period.

Further, the CP configuration period may be predefined, or may be notified to the wireless network device by another wireless network device, which is not limited in this application.

Further, the CP type and/or the CP length included in the CP configuration information may be predefined, or may be notified to the wireless network device by another wireless network device, which is not limited in this application.

In some possible implementations, the CP configuration information includes a CP type, and the CP type is a first CP type or a second CP type. The second determining module 22 is specifically configured to: use the first M symbols of the first time unit. And/or the CP of the last N symbols are determined as the CP of the CP type indicated by the CP configuration information; the CP of the remaining symbols in the first time unit is determined (such as may be determined based on a predefined or signaling configuration or an internal algorithm) a CP of the first CP type or the second CP type, the remaining symbols being symbols other than the M and the N symbols in the first time unit. Wherein, the M and the N are integers greater than 0, and the sum of M and N is not greater than the total number of symbols included in the first time unit; the values of the M and N may be predefined or configured by signaling. .

Optionally, the CP type indicated by the CP configuration information is a first CP type; the second determining module 22 determines a CP of the first M symbols and/or the last N symbols of the first time unit as the CP configuration information indication. When the CP of the CP type is used, the CP of the first M symbols and the last N symbols of the first time unit may be determined as the CP of the first CP type.

Optionally, the CP type indicated by the CP configuration information is a second CP type; the second determining module 22 determines a CP of the first M symbols and/or the last N symbols of the first time unit as the CP configuration information indication. When the CP of the CP type is used, it may be specifically determined that the CP of the last N symbols of the first time unit is determined as the CP of the second CP type.

In some possible implementations, the CP configuration information includes a CP type. The second determining module 22 determines the CP of the first time unit based on the CP configuration information, and may specifically: determine the first type based on the CP type indicated by the CP configuration information. The location of the time unit; determining the CP of the at least one symbol or the at least one channel in the first time unit as the CP of the first CP type or the second CP type.

In some possible implementations, the second determining module 22 determines the CP of the first time unit based on the CP configuration information, and may specifically: determine, according to the CP configuration information, at least one symbol or at least one channel in the first time unit. CP.

Optionally, the wireless network device may implement some or all of the steps performed by the terminal in the CP determining method in the foregoing embodiments of FIG. 3 to FIG. 7 by using the foregoing module. It should be understood that the embodiments of the present invention are device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present invention.

Referring to FIG. 10, FIG. 10 is a schematic structural diagram of still another wireless network device according to an embodiment of the present invention. Specifically, as shown in FIG. 10, the wireless network device in the embodiment of the present invention may include: a communication interface 300, a memory 200, and a processor 100, and the processor 100 and the communication interface 300 and the memory 200, respectively. connection.

The communication interface 300, the memory 200, and the processor 100 may be connected to each other through a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 100 may be a central processing unit (English: Central Processing Unit, abbreviated as CPU), a network processor (English: Network Processor, abbreviated as NP) or a combination of a CPU and an NP.

The processor 100 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (English: Application-Specific Integrated Circuit, ASIC), a programmable logic device (English: Programmable Logic Device, abbreviation: PLD) or a combination thereof. The above PLD can be a complex programmable logic device (English: Complex Programmable Logic Device, abbreviation: CPLD), Field-Programmable Gate Array (English: Field-Programmable Gate Array, abbreviation: FPGA), general array logic (English: Generic Array Logic, abbreviation: GAL) or any combination thereof.

The memory 200 may include a volatile memory (English: Volatile Memory), such as a random access memory (English: Random-Access Memory, abbreviation: RAM); the memory may also include a non-volatile memory (English: non-volatile) Memory), such as flash memory (English: flash memory), hard disk (English: Hard Disk Drive, abbreviated: HDD) or solid state hard disk (English: Solid-State Drive, abbreviated: SSD); the memory 200 may also include the above types A combination of memories.

The wireless network device may be a base station or a terminal. Optionally, the memory 200 can be used to store program instructions. The processor 100 calls the program instructions stored in the memory 200, and can perform one or more steps in the embodiment shown in FIG. 3 to FIG. The embodiment enables the wireless network device to implement the functions in the above method. For example, the wireless network device may implement some or all of the steps performed by the base station in the CP determining method in the foregoing embodiments of FIG. 3 to FIG. 7 through the foregoing modules.

Referring to FIG. 11, FIG. 11 is a schematic structural diagram of still another wireless network device according to an embodiment of the present invention. Specifically, as shown in FIG. 11, the wireless network device of the embodiment of the present invention may include: a communication interface 600, a memory 500, and a processor 400. The processor 400 is connected to the communication interface 600 and the memory 500, respectively.

The communication interface 600, the memory 500, and the processor 400 may be connected to each other through a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 400 can be a CPU, an NP or a combination of a CPU and an NP.

The processor 400 may further include a hardware chip. The above hardware chip may be an ASIC, a PLD, or a combination thereof. The above PLD may be a CPLD, an FPGA, a GAL, or any combination thereof.

The memory 500 may include a volatile memory (English: Volatile Memory), such as a RAM; the memory may also include a non-volatile memory (English: non-volatile memory), such as flash memory (HD memory), HDD Or SSD; the memory 500 may also include a combination of the above types of memories.

The wireless network device may be a terminal or a base station. Optionally, the memory 500 can be used to store program instructions. The processor 400 calls the program instructions stored in the memory 500, and can perform one or more steps in the embodiment shown in FIG. 3 to FIG. The embodiment enables the wireless network device to implement the functions in the above method. For example, the wireless network device may implement some or all of the steps performed by the terminal in the CP determining method in the foregoing embodiments of FIG. 3 to FIG. 7 through the foregoing modules.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be another division manner, for example, multiple modules or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, 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 module, and may be electrical, mechanical or otherwise.

The modules described as separate components may or may not be physically separated. The components displayed as modules may or may not be physical modules, that is, may be located in one place, or may be distributed to multiple network modules. . Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of hardware plus software function modules.

The above-described integrated modules implemented in the form of software function modules can be stored in a computer readable storage medium. The software function modules described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (English: Read-Only Memory, ROM for short), a random access memory (English: Random Access Memory, RAM), a magnetic disk, or an optical disk. A medium that can store program code.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in 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. 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)).

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A cyclic prefix CP determining method, comprising:

The first wireless network device determines CP configuration information, where the CP configuration information includes at least one of a CP configuration period, a CP type, and a CP length;

The first wireless network device determines a CP of the first time unit based on the CP configuration information.
The method according to claim 1, wherein the CP configuration information comprises a CP configuration period and a CP type, and the CP configuration period is K 0.5 milliseconds; wherein K is an integer greater than or equal to 1;

The method further includes:

The first wireless network device sends a message to the second wireless network device according to the CP configuration period, where the message is used to indicate the CP type.
The method according to claim 1, wherein the CP configuration information comprises a CP configuration period and a CP type, and the unit of the first time unit is a first time unit;

When the CP type is the first CP type, the CP configuration period is at least one of the first time units;

When the CP type is the second CP type, the CP configuration period is K 0.5 milliseconds; wherein K is an integer greater than or equal to 1;

The method further includes:

The first wireless network device sends a message to the second wireless network device according to the CP configuration period, where the message is used to indicate the CP type.
The method according to claim 2 or 3, wherein the message is sent by the first wireless network device to the second wireless network device by using a second time unit, and the second time unit is Determining based on at least one of a first time unit included in a second time unit, a first offset parameter, and the CP configuration period;

The time unit of the first time unit and the second time unit is the first time unit, and one of the second time units includes at least one of the first time units; the first offset The parameter is configured to determine an offset value of the second time unit within the CP configuration period or a second time unit.
The method according to claim 2 or 3, wherein the CP configuration information further includes a second offset parameter;

The second offset parameter is determined based on the identifier of the second time unit and the CP configuration period.
The method according to claim 2 or 3, wherein the CP of the time unit included in the range before the CP configuration period corresponding to the next CP configuration information is configured as the CP configuration information. Indicates the CP type of CP.
The method according to claim 1, wherein the CP configuration information comprises a CP type and a CP length, and the CP type is a second CP type; the CP length is based on a subcarrier spacing of the first time unit. The identifier of the first time unit and the number of first time units included in a third time unit are determined;

The time unit of the first time unit is a first time unit, and one of the third time units includes at least one of the first time units.
The method according to claim 1, wherein the CP configuration information comprises a CP type, the CP type is a first CP type or a second CP type; and the first wireless network device determines based on the CP configuration information. The CP of the first time unit, including:

The first wireless network device configures a CP of the first M symbols and/or the last N symbols of the first time unit as a CP of the CP type indicated by the CP configuration information; wherein the M and N are both greater than An integer of 0, and the sum of M and N is not greater than the total number of symbols included in the first time unit;

The first wireless network device configures a CP of the remaining symbols in the first time unit as a CP of the first CP type or the second CP type, where the remaining symbols are in the first time unit The M and the symbols other than the N symbols.
The method according to claim 8, wherein the CP type indicated by the CP configuration information is a first CP type; the first wireless network device sets a first M symbols of the first time unit and/or a rear N The CP of the symbol is configured as the CP of the CP type indicated by the CP configuration information, including:

The first wireless network device configures a CP of the first M symbols and the last N symbols of the first time unit as a CP of the first CP type.
The method according to claim 8, wherein the CP type indicated by the CP configuration information is a second CP type; the first wireless network device sets a first M symbols of the first time unit and/or a rear N The CP of the symbol is configured as the CP of the CP type indicated by the CP configuration information, including:

The first wireless network device configures a CP of the last N symbols of the first time unit as a CP of the second CP type.
The method according to claim 1, wherein the CP configuration information includes a CP type, and the first wireless network device determines a CP of the first time unit based on the CP configuration information, including:

Determining, by the first wireless network device, a location of the first time unit based on a CP type indicated by the CP configuration information;

The first wireless network device configures the CP of the at least one symbol or the at least one channel in the first time unit as a CP of a first CP type or a second CP type.
A cyclic prefix CP determining method, comprising:

The second wireless network device determines CP configuration information, where the CP configuration information includes at least one of a CP configuration period, a CP type, and a CP length;

The second wireless network device determines a CP of the first time unit based on the CP configuration information.
The method according to claim 12, wherein the CP configuration information comprises a CP configuration period and a CP type, and the CP configuration period is K 0.5 milliseconds; wherein K is an integer greater than or equal to 1;

The determining, by the second wireless network device, the CP configuration information, including:

The second wireless network device receives a message sent by the first wireless network device according to the CP configuration period, where the message is used to indicate the CP type.
The method according to claim 12, wherein the CP configuration information comprises a CP configuration period and a CP type, and the unit of the first time unit is a first time unit;

When the CP type is the first CP type, the CP configuration period is at least one of the first time units;

When the CP type is the second CP type, the CP configuration period is K 0.5 milliseconds; wherein K is an integer greater than or equal to 1;

The determining, by the second wireless network device, the CP configuration information, including:

The second wireless network device receives a message sent by the first wireless network device according to the CP configuration period, where the message is used to indicate the CP type.
A wireless network device, comprising:

a first determining module, configured to determine CP configuration information, where the CP configuration information includes at least one of a CP configuration period, a CP type, and a CP length;

And a second determining module, configured to determine a CP of the first time unit based on the CP configuration information.
The wireless network device according to claim 15, wherein the CP configuration information comprises a CP configuration period and a CP type, and the CP configuration period is K 0.5 milliseconds; wherein K is an integer greater than or equal to 1;

The wireless network device further includes:

And a communication module, configured to send a message to another wireless network device according to the CP configuration period, where the message is used to indicate the CP type.
The wireless network device according to claim 15, wherein the CP configuration information comprises a CP configuration period and a CP type, and the unit of the first time unit is a first time unit;

When the CP type is the first CP type, the CP configuration period is at least one of the first time units;

When the CP type is the second CP type, the CP configuration period is K 0.5 milliseconds; wherein K is an integer greater than or equal to 1;

The wireless network device further includes:

And a communication module, configured to send a message to another wireless network device according to the CP configuration period, where the message is used to indicate the CP type.
The wireless network device according to claim 16 or 17, wherein the message is that the wireless network device sends to the another wireless network device by using a second time unit, and the second time unit is Determining based on at least one of a first time unit included in a second time unit, a first offset parameter, and the CP configuration period;

The time unit of the first time unit and the second time unit is the first time unit, and one of the second time units includes at least one of the first time units; the first offset The parameter is configured to determine an offset value of the second time unit within the CP configuration period or a second time unit.
The wireless network device according to claim 16 or 17, wherein the CP configuration information further includes a second offset parameter;

The second offset parameter is determined based on the identifier of the second time unit and the CP configuration period.
The wireless network device according to claim 16 or 17, wherein the CP of the time unit included in the range before the CP configuration period corresponding to the CP configuration period corresponding to the next CP configuration information is configured as the CP. The CP of the CP type indicated by the configuration information.
The wireless network device according to claim 15, wherein the CP configuration information comprises a CP type and a CP length, and the CP type is a second CP type; the CP length is based on a first time unit a carrier interval, an identifier of the first time unit, and a number of first time units included in a third time unit are determined;

The time unit of the first time unit is a first time unit, and one of the third time units includes at least one of the first time units.
The wireless network device according to claim 15, wherein the CP configuration information includes a CP type, and the CP type is a first CP type or a second CP type; and the second determining module is specifically configured to:

Configuring a CP of the first M symbols and/or the last N symbols of the first time unit as a CP of the CP type indicated by the CP configuration information; wherein the M and N are integers greater than 0, and M and The sum of N is not greater than the total number of symbols included in the first time unit;

And configuring a CP of the remaining symbols in the first time unit as the CP of the first CP type or the second CP type, where the remaining symbols are in the first time unit except the M and the N Symbols other than symbols.
The wireless network device according to claim 22, wherein the CP type indicated by the CP configuration information is a first CP type; and the second determining module is performing the first M symbols of the first time unit And when the CP of the last N symbols is configured as the CP of the CP type indicated by the CP configuration information, specifically for:

The CPs of the first M symbols and the last N symbols of the first time unit are configured as CPs of the first CP type.
The wireless network device according to claim 22, wherein the CP type indicated by the CP configuration information is a second CP type; and the second determining module is performing the first M symbols of the first time unit And when the CP of the last N symbols is configured as the CP of the CP type indicated by the CP configuration information, specifically for:

The CP of the last N symbols of the first time unit is configured as the CP of the second CP type.
The wireless network device according to claim 15, wherein the CP configuration information includes a CP type; and the second determining module is specifically configured to:

Determining a location of the first time unit based on a CP type indicated by the CP configuration information;

The CP of the at least one symbol or the at least one channel in the first time unit is configured as a CP of a first CP type or a second CP type.
A wireless network device, comprising:

a first determining module, configured to determine CP configuration information, where the CP configuration information includes at least one of a CP configuration period, a CP type, and a CP length;

And a second determining module, configured to determine a CP of the first time unit based on the CP configuration information.
The wireless network device according to claim 26, wherein the CP configuration information comprises a CP configuration period and a CP type, and the CP configuration period is K 0.5 milliseconds; wherein K is an integer greater than or equal to 1;

When the first determining module determines the CP type, it is specifically used to:

Receiving a message sent by another wireless network device according to the CP configuration period, the message being used to indicate the CP type.
The wireless network device according to claim 26, wherein the CP configuration information comprises a CP configuration period and a CP type, and the unit of the first time unit is a first time unit;

When the CP type is the first CP type, the CP configuration period is at least one of the first time units;

When the CP type is the second CP type, the CP configuration period is K 0.5 milliseconds; wherein K is an integer greater than or equal to 1;

When the first determining module determines the CP type, it is specifically used to:

Receiving a message sent by another wireless network device according to the CP configuration period, the message being used to indicate the CP type.