Modulation and demodulation methods, communication equipment and storage medium

Abstract

The embodiment of the invention provides a modulation method, a demodulation method, communication equipment and a storage medium. The modulation method executed by a network device comprises: encoding N first bits into M second bits; n is a positive integer; m is a positive integer greater than N; the value of the first second bit and the value of the last second bit of the M second bits are the same; and modulating the M second bits to an orthogonal frequency division multiplexing (OFDM) symbol.

Description

Modulation, demodulation method, communication equipment and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a modulation and demodulation method, a communication device, and a storage medium. Background Art

[0002] Binary on-off keying (OOK) is a special case of amplitude shift keying (ASK) modulation. For example, OOK modulation can include one amplitude modulation of 0 and another amplitude modulation of non-zero. OOK modulation is also known as binary amplitude modulation keying (2ASK). For example, OOK modulation uses a unipolar non-return-to-zero code sequence to control the on and off of a sinusoidal carrier.

[0003] Summary of the Invention

[0004] Embodiments of the present disclosure provide a modulation and demodulation method, a communication device, and a storage medium.

[0005] According to a first aspect of an embodiment of the present disclosure, a modulation method is provided, which is performed by a network device, and the method includes:

[0006] N first bits are encoded into M second bits; N is a positive integer; M is a positive integer greater than N; the first second bit and the last second bit of the M second bits have the same value; and the M second bits are modulated onto an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

[0007] According to a second aspect of an embodiment of the present disclosure, a demodulation method is provided, which is executed by a terminal and includes: detecting downlink reception on an orthogonal frequency division multiplexing (OFDM) symbol, wherein one OFDM symbol maps M fourth bits; demodulating the downlink reception to obtain M fourth bits; wherein the first fourth bit and the last fourth bit of the M fourth bits mapped on one OFDM symbol have the same value; M is a positive integer greater than or equal to 2; decoding the M fourth bits to obtain N fifth bits; and N is a positive integer less than M.

[0008] According to a third aspect of an embodiment of the present disclosure, a demodulation method is provided, wherein the method includes:

[0009] Determine how the OOK symbols are detected,

[0010] According to the detection method, OOK symbols detected on N OFDM symbols continuously distributed in the time domain are detected; one OFDM symbol is divided into one or more OOK symbols;

[0011] The demodulator detects the OOK symbols, and one OOK symbol is mapped to one coding bit.

[0012] According to a fourth aspect of an embodiment of the present disclosure, a network device is provided, comprising:

[0013] The processing module is configured to encode N first bits into M second bits; N is a positive integer; M is a positive integer greater than N; the first second bit and the last second bit of the M second bits have the same value; and modulate the M second bits onto an OFDM symbol.

[0014] According to a fifth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0015] A receiving module configured to detect downlink reception on OFDM symbols;

[0016] The processing module is configured to demodulate the downlink reception to obtain M fourth bits; wherein the first fourth bit and the last fourth bit of the M fourth bits mapped on an OFDM symbol have the same value; M is a positive integer greater than or equal to 2; and decode the M fourth bits to obtain N fifth bits; N is a positive integer less than M.

[0017] According to a sixth aspect of an embodiment of the present disclosure, a terminal is provided, including:

[0018] A processing module configured to determine a detection method for the OOK symbol,

[0019] A receiving module is configured to detect OOK symbols detected on N OFDM symbols continuously distributed in a time domain according to a detection method; wherein one OFDM symbol is divided into one or more OOK symbols;

[0020] The processing module is configured to demodulate the detected OOK symbols, where one OOK symbol is mapped to one coding bit.

[0021] According to the seventh aspect of the embodiment of the present disclosure, a communication device is provided, wherein the communication device includes: one or more processors; wherein the processor is used to call instructions so that the communication device executes the modulation and demodulation method provided by any technical solution provided by the first to third aspects above.

[0022] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, which, when the instructions are executed on a communication device, enable the communication device to execute the modulation and demodulation method provided in any of the first to third aspects.

[0023] According to a ninth aspect of an embodiment of the present disclosure, there is provided a communication system, including:

[0024] A network device, configured to execute the modulation method provided by any technical solution of the first aspect;

[0025] The terminal is used to execute the demodulation method provided by any technical solution of the second aspect or the third aspect.

[0026] The technical solution provided by the embodiment of the present disclosure encodes the values ​​of the first second bit and the last second bit of the M second bits mapped by an OFDM symbol so that the values ​​are the same, thereby enabling the sequence corresponding to an OFDM symbol and its corresponding CP to form a sequence with the same beginning and end, thereby facilitating cyclic shift-based demodulation at the receiving end, reducing mutual interference between the OFDM symbol and the CP, and improving the success rate of information demodulation transmitted by the OFDM symbol.

[0027] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not restrictive of the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the embodiments of the present disclosure.

[0029] FIG1A is a schematic diagram showing an architecture of a communication system according to an exemplary embodiment;

[0030] FIG1B is a schematic diagram showing an OFDM symbol, a CP, and an OKK symbol according to an exemplary embodiment;

[0031] FIG1C is a schematic diagram showing another OFDM symbol, CP and OKK symbol according to an exemplary embodiment;

[0032] FIG1D is a schematic diagram showing another OFDM symbol, CP and OKK symbol according to an exemplary embodiment;

[0033] FIG2 is a schematic flow chart showing a modulation and demodulation method according to an exemplary embodiment;

[0034] FIG3 is a schematic flow chart showing a modulation method according to an exemplary embodiment;

[0035] FIG4 is a schematic flow chart showing a demodulation method according to an exemplary embodiment;

[0036] FIG5A is a schematic structural diagram of a network device according to an exemplary embodiment;

[0037] FIG5B is a schematic structural diagram of a terminal according to an exemplary embodiment;

[0038] FIG5C is a schematic structural diagram of a terminal according to an exemplary embodiment;

[0039] FIG6A is a schematic structural diagram of a communication device according to an exemplary embodiment;

[0040] FIG6B is a schematic structural diagram of a chip according to an exemplary embodiment. DETAILED DESCRIPTION

[0041] Embodiments of the present disclosure provide a modulation and demodulation method, a communication device, a communication system, and a storage medium.

[0042] A first aspect provides a modulation method, performed by a network device, the method comprising:

[0043] N first bits are encoded into M second bits; N is a positive integer; M is a positive integer greater than N; the first second bit and the last second bit of the M second bits have the same value; and the M second bits are modulated onto an OFDM symbol.

[0044] Based on the above scheme, by encoding the values ​​of the first second bit and the last second bit of the M second bits mapped by an OFDM symbol to be the same, it is possible to form a sequence corresponding to an OFDM symbol and its corresponding CP with the same beginning and end, thereby facilitating cyclic shift-based demodulation at the receiving end, reducing mutual interference between the OFDM symbol and the CP, and improving the success rate of information demodulation of OFDM symbol transmission.

[0045] In some embodiments of the first aspect, encoding the N first bits into the M second bits includes at least one of the following:

[0046] When N is equal to 1, one first bit is encoded into M second bits according to the first mapping relationship;

[0047] When N is greater than 1, sequentially encode N first bits according to the first mapping relationship to obtain a third bit, concatenate the third bits of the N first bits, and cyclically shift the concatenated third bits to obtain M second bits;

[0048] When N is greater than 1, multiple first bits are jointly encoded into M second bits according to the second mapping relationship; M / N is a positive integer greater than or equal to 2.

[0049] Based on the above solution, at least two mapping relationships for encoding N first bits into M second bits are given, and the corresponding mapping method can be flexibly selected as needed later.

[0050] In some embodiments of the first aspect, modulating the M second bits onto one OFDM symbol includes:

[0051] Divide the OFDM symbol into M OOK symbols;

[0052] The M second bits are modulated onto M OOK symbols, where one second bit is mapped to one OOK symbol.

[0053] In some embodiments of the first aspect, modulating the M second bits onto one OFDM symbol includes:

[0054] Divide the OFDM symbol and the cyclic prefix CP of the OFDM symbol into M OOK symbols;

[0055] The M second bits are modulated onto M OOK symbols; wherein one second bit is mapped to one OOK symbol.

[0056] In some embodiments of the first aspect, the method further comprises:

[0057] The CP of the OFDM symbol is set according to the sampling value of the OOK symbol mapped to the last second bit among the M second bits.

[0058] In some embodiments of the first aspect, encoding the N first bits into M second bits includes:

[0059] The N first bits of the low power consumption wake-up signal LP-WUS are encoded into M second bits.

[0060] A second aspect provides a demodulation method, which is performed by a terminal and includes:

[0061] Detecting downlink reception on an OFDM symbol, wherein one OFDM symbol is mapped to M fourth bits;

[0062] Demodulating the downlink reception to obtain M fourth bits; wherein the first fourth bit and the last fourth bit of the M fourth bits mapped on one OFDM symbol have the same value; and M is a positive integer greater than or equal to 2;

[0063] Decoding the M fourth bits yields N fifth bits, where N is a positive integer less than M.

[0064] In some embodiments of the second aspect, decoding the M fourth bits to obtain the N fifth bits includes one of the following:

[0065] Decoding the M fourth bits according to the first mapping relationship to obtain a fifth bit;

[0066] The M fourth bits are jointly decoded according to the second mapping relationship to obtain multiple fifth bits.

[0067] In some embodiments of the second aspect, the downlink reception includes OOK symbols.

[0068] In some embodiments of the second aspect, an OFDM symbol is divided into M OOK symbols; an OOK symbol is mapped to a fourth bit; and the method includes:

[0069] Before demodulating the downlink reception to obtain the M fourth bits, the cyclic prefix CP between two adjacent OFDM symbols in the downlink reception is removed.

[0070] In some embodiments of the second aspect, an OFDM symbol and a CP corresponding to the OFDM symbol are divided into M OOK symbols, and one OOK symbol is mapped to a fourth bit.

[0071] A third aspect provides a demodulation method, wherein the method includes:

[0072] Determine how the OOK symbols are detected,

[0073] According to the detection method, OOK symbols detected on N OFDM symbols continuously distributed in the time domain are detected; one OFDM symbol is divided into one or more OOK symbols;

[0074] The demodulator detects the OOK symbols, and one OOK symbol is mapped to one coding bit.

[0075] In some embodiments of the third aspect, the detection method includes at least one of the following:

[0076] The first method is to detect the cyclic prefix CP of the OFDM symbol as part of OFDM;

[0077] The second method is to detect OFDM symbols while ignoring the CP of the OFDM symbols.

[0078] In some embodiments of the third aspect, determining a detection mode for an OFDM symbol includes:

[0079] Determine the detection method of OFDM symbols when performing a low power wake-up signal LP-WUS.

[0080] A fourth aspect provides a network device, comprising:

[0081] The processing module is configured to encode N first bits into M second bits; N is a positive integer; M is a positive integer greater than N; the first second bit and the last second bit of the M second bits have the same value; and modulate the M second bits onto an OFDM symbol.

[0082] A fifth aspect provides a terminal, comprising:

[0083] A receiving module configured to detect downlink reception on OFDM symbols;

[0084] The processing module is configured to demodulate the downlink reception to obtain M fourth bits; wherein the first fourth bit and the last fourth bit of the M fourth bits mapped on an OFDM symbol have the same value; M is a positive integer greater than or equal to 2; and decode the M fourth bits to obtain N fifth bits; N is a positive integer less than M.

[0085] A sixth aspect provides a terminal, comprising:

[0086] A processing module configured to determine a detection method for the OOK symbol,

[0087] A receiving module is configured to detect OOK symbols detected on N OFDM symbols continuously distributed in a time domain according to a detection method; wherein one OFDM symbol is divided into one or more OOK symbols;

[0088] The processing module is configured to demodulate the detected OOK symbols, where one OOK symbol is mapped to one coding bit.

[0089] In a seventh aspect, an embodiment of the present disclosure provides a communication device, the communication device including: one or more processors;

[0090] The processor is used to call instructions to enable the communication device to execute the methods described in the optional implementation manners of the first to third aspects.

[0091] In an eighth aspect, an embodiment of the present disclosure provides a storage medium, wherein the storage medium stores instructions, which, when the instructions are executed on a communication device, enable the communication device to execute the method described in the optional implementation of the first to third aspects.

[0092] In a ninth aspect, an embodiment of the present disclosure provides a program product. When the program product is executed by a communication device, the communication device executes the modulation method described in the optional implementation manner of the first to third aspects.

[0093] In a tenth aspect, an embodiment of the present disclosure provides a computer program, which, when executed on a computer, enables the computer to execute the modulation and demodulation methods described in the optional implementations of the first to third aspects.

[0094] In an eleventh aspect, an embodiment of the present disclosure provides a communication system, including:

[0095] A network device, configured to execute the modulation method provided by any technical solution of the first aspect;

[0096] The terminal is used to execute the demodulation method provided by any technical solution of the second aspect or the third aspect.

[0097] It is understandable that the above-mentioned terminals, network devices, communication systems, program products, and computer programs are all used to execute the methods provided by the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0098] The embodiments of the present disclosure propose a modulation and demodulation method, a communication device, a communication system and a storage medium. The embodiments of the present disclosure are not exhaustive, but are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0099] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0100] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0101] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "the", "the", etc., can mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article can be understood as a singular expression or a plural expression.

[0102] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0103] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0104] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "in one case A, in another case B," or "in one case A, in another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The same applies when there are more branches such as A, B, and C.

[0105] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0106] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different. For another example, if the description object is "information", then the "first category of information" and the "second category of information" can be the same information or different information, and their contents can be the same or different.

[0107] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0108] In some embodiments, terms such as "...", "determine...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0109] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not less than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0110] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0111] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0112] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0113] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc. can be used interchangeably.

[0114] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0115] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0116] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0117] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0118] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0119] FIG1A is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0120] As shown in Figure 1A, a communication system 100 includes a terminal 101 and a network device 102. The network device 102 may include an access network device and / or a core network device.

[0121] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0122] In some embodiments, the terminal is also referred to as User Equipment (UE).

[0123] In some embodiments, the access network device may be, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved NodeB (eNB), a next generation evolved NodeB (ng-eNB), a next generation NodeB (gNB), a node B (NB), a home node B (HNB), a home evolved nodeB (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

[0124] In some embodiments, the technical solution of the present disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within the access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of the Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0125] In some embodiments, the access network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0126] In some embodiments, the core network device may be a single device including a first network element, or may be a plurality of devices or a group of devices, each including a first network element. The network element may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0127] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. A person skilled in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

[0128] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1A , or a portion thereof, but are not limited thereto. The entities shown in FIG1A are illustrative only. The communication system may include all or part of the entities shown in FIG1A , or may include other entities other than those shown in FIG1A . The number and form of the entities may be arbitrary. The connection relationship between the entities is illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0129] The embodiments of the present disclosure can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, systems using configuration methods for other resources, and next-generation systems based on and extending these systems. Furthermore, multiple systems may be combined (for example, LTE and NR).

[0130] For example, in order to further save power on the terminal, 3GPP is currently discussing a mechanism based on a low-power wake-up receiver (LP-WUR). In the power-saving state, the terminal (that is, the user equipment (UE)) can put the main receiver (MR) into an ultra-deep sleep state, and turn on the LP-WUR receiver to listen for the wake-up signal (LP-WUS) that supports low-power reception. When the LP-WUR detects the LP-WUS for this UE, the UE turns on the MR and performs normal transmission. This method greatly reduces the power consumption of the MR, and the power consumption of the LP-WUR receiver is very low, thereby achieving greater power saving gains.

[0131] To properly detect LP-WUS, the terminal needs to obtain the time and frequency location of the base station's LP-WUS transmission. The terminal can achieve time and frequency synchronization by detecting synchronization signals. For example, the synchronization signal can be a Synchronization Signal and (Pysical Broadcast Channel, PBCH) block (SSB) or a Low Power Synchronization Signal (LP-SS).

[0132] The receiver of LP-WUS can use ASK modulation to carry wake-up information. OOK modulation is a special case of ASK modulation. The method of the present invention is described below using OOK as an example, and the method can also be extended to ASK modulation. For example, OOK ON represents bit 1, and OOK OFF represents bit 0. The LP-WUS information can also be encoded, with each coded bit mapped to an OOK symbol, such as Manchester coding. For 1 / 2 Manchester coding, information bit 1 can be mapped to 2 coded bits (1, 0), and information bit 0 can be mapped to 2 coded bits (0, 1). For 1 / 4 Manchester coding, information bit 1 can be mapped to 4 coded bits (1, 0, 1, 0), and information bit 0 can be mapped to 4 coded bits (0, 1, 0, 1). The time domain or frequency domain sequence carried by each OOK symbol of LP-WUS can also carry wake-up information.

[0133] LP-WUR can support at least two types. One type of LP-WUR only supports envelope detection of the LP-WUS OOK symbols (hereinafter referred to as OOK LR). This receiver has relatively poor link performance. The other type of LP-WUR can detect the time or frequency domain sequence carried by the LP-WUS OOK symbols, thereby improving link performance. This is hereinafter referred to as OFDM LR.

[0134] To support OOK modulation in an OFDM system, one or M OOK symbols are mapped to one OFDM symbol. For example, M = 2, 4, 8, etc. A CP is still required for each OFDM symbol. This approach supports FDM multiplexing of the LP-WUS channel with other NR downlink control and data channels while maintaining subcarrier orthogonality. Improving link performance by transmitting OOK-modulated LP-WUS over OFDM remains a challenge.

[0135] LP-WUS can use 1 / M Manchester coding and map it to M OOK symbols within an OFDM symbol. As shown in Figure 1B, with this method, the first and last OOK symbols within an OFDM symbol must be different, resulting in a CP that is always different from adjacent OOK symbols. This means that the presence of a CP always interferes with adjacent OOK symbols. Furthermore, the presence of a CP also causes OOK symbols to appear non-periodically. How to handle the CP to optimize LP-WUS transmission performance is a challenge that needs to be addressed.

[0136] In view of this, as shown in FIG2 , an embodiment of the present disclosure provides a modulation and demodulation method, which is performed by a communication system. The method may include:

[0137] S2101: The network device encodes N first bits into M second bits.

[0138] In some embodiments, the network device may be an access network device.

[0139] In some embodiments, the network device encodes N first bits of the LP-WUS into M second bits.

[0140] In some embodiments, N can be any positive integer. For example, N can be 1, 2, 3, or 4.

[0141] In some embodiments, M may be any positive integer greater than or equal to N. For example, when M is equal to N, one first bit is equivalent to being mapped to one second bit. When M is greater than N, one first bit is equivalent to being encoded into multiple second bits.

[0142] In some embodiments, the first bit may be an information bit. Exemplarily, the information bit is a bit carrying original information content.

[0143] In some embodiments, the second bit is a coding bit. Exemplarily, the coding bit is a bit obtained by encoding and converting the information bit. Generally, the coding bit has more information bits, thereby improving the anti-interference capability during information transmission.

[0144] The following are several optional ways to encode N first bits into M second bits:

[0145] Mode 1: When N is equal to 1, an information ratio is encoded into M second bits according to the first mapping relationship.

[0146] In this embodiment, it is equivalent to performing separate encoding of a single information bit based on the first mapping relationship, so that the encoding of different information bits does not interfere with each other.

[0147] In some embodiments, the first mapping relationship includes at least one of the following:

[0148] A first bit having a first value corresponds to the first sequence; the value of the first second bit of the first sequence is the same as the value of the last second bit of the first sequence;

[0149] A first bit having a second value corresponds to the second sequence; the value of the first second bit of the second sequence is the same as the value of the last second bit of the second sequence;

[0150] The second value is not equal to the first value, and the second sequence is different from the first sequence.

[0151] In some embodiments, if the first value is "0", the second value is "1". If the first value is "1", the second value is "0".

[0152] The following Table 1 is an example of encoding one first bit into four second bits. Table 1 provides two different first mapping relationships.

[0153] Table 1

[0154] It can be seen from Table 1 that no matter whether mapping relationship 1 or mapping relationship is adopted, when the value of the first bit is 0 or 1, the values ​​of the first coded bit and the last coded bit in the sequence of 4 second bits obtained by encoding are the same.

[0155] Method 2:

[0156] When N is greater than 1, multiple first bits are encoded into M second bits; M / N is a positive integer greater than or equal to 2.

[0157] In some embodiments, encoding the plurality of first bits into M second bits comprises at least one of the following:

[0158] Jointly encoding the plurality of first bits into M second bits according to a second mapping relationship;

[0159] The plurality of first bits are concatenated and encoded into M second bits according to the first mapping relationship.

[0160] In some embodiments, during joint coding, it is necessary to simultaneously map the values ​​of the multiple first bits to M second bits.

[0161] In some embodiments, the second mapping relationship includes: a preset correspondence relationship between a plurality of bit sequences of first bits and a bit sequence of coded bits.

[0162] In some embodiments, concatenating and encoding the plurality of first bits into M second bits according to the first mapping relationship may include:

[0163] Encode N first bits in sequence according to the first mapping relationship to obtain a third bit;

[0164] Concatenate the third bit of N first bits;

[0165] The cyclically shifted and concatenated third bit is used to obtain M second bits.

[0166] The first second bit and the last second bit of the M second bits obtained after cyclic shifting of the concatenated third bit are the same.

[0167] In other embodiments, according to the first mapping relationship and / or the second mapping relationship, the first part of the M second bits is mapped to the first part of the bits in the N first bits, and the second part of the M bits is mapped to the second part of the bits in the first bits.

[0168] In some embodiments, the first portion of bits may be bits at a specific position among the N bits. For example, the specific position may include: one or more first bits that are ranked first among the N first bits, or one or more first bits that are ranked last among the N first bits.

[0169] In some embodiments, the first portion of the M second bits may include at least the first S bits and the last S bits of the M second bits. For example, S is a positive integer greater than or equal to 2. Exemplarily, 2S may be the number of second bits mapped to a first bit. In this case, the first portion of bits may be determined using the first mapping relationship, and the second portion of bits may use the first mapping relationship or a mapping relationship other than the first mapping relationship, as long as each encoded second bit can be decoded and restored to a unique first bit.

[0170] Table 2 below is an example of encoding two first bits into eight second bits.

[0171] Table 2

[0172] It can be seen from Table 2 that the values ​​of the last two second bits of the bit sequence of 8 second bits corresponding to any sequence of two first bits are the same.

[0173] Table 3 below is an example of encoding two first bits into four second bits.

[0174] Table 3

[0175] Table 3 shows that the values ​​of the last two second bits of a bit sequence of four second bits corresponding to any sequence of two first bits are the same. Furthermore, a single sequence of first bits can correspond to multiple sequences of M second bits. The specific sequence of first bits corresponding to the multiple sequences of M second bits can be flexibly set based on the channel's bit error rate, ensuring that even if a coded bit is sent incorrectly during transmission, it can still be correctly restored at the receiving end.

[0176] Method 3:

[0177] According to the third mapping relationship, the N first bits are encoded into M second bits.

[0178] The value of the first second bit and the value of the last second bit of the M bits encoded based on the third mapping relationship may be the same or different.

[0179] In some embodiments, encoding N first bits into M second bits according to the third mapping relationship includes:

[0180] According to the third mapping relationship, each first bit in the N first bits is individually encoded to obtain M second bits formed by sequentially combining the individually encoded bits of the N first bits; or,

[0181] According to the third mapping relationship, the N first bits are jointly encoded to obtain M second bits corresponding to the N first bits at the same time.

[0182] In some embodiments, in the embodiments of the present disclosure, the encoding method for encoding N first bits into M second bits can be any encoding method as long as the requirements of the above-mentioned first mapping relationship to the third mapping relationship are met.

[0183] In some embodiments, Manchester coding is used to encode N first bits into M second bits.

[0184] S2102: The network device maps the M second bits to an OFDM symbol.

[0185] In some embodiments, the network device maps the M second bits to one OFDM symbol.

[0186] In some embodiments, the network device maps the M bits obtained by encoding according to the first mapping relationship and / or the second mapping relationship to an OFDM symbol.

[0187] In some embodiments, the network device maps the M second bits obtained by encoding according to the third mapping relationship to M OFDM symbols. That is, one second bit is mapped to one OFDM symbol. In other words, when the third mapping relationship is used to map N first bits to M second bits, this can be applied to a scenario where one OOK symbol corresponds to one OFDM symbol. Of course, in some cases, any second coded bit among the M second bits obtained using the third mapping relationship can also be mapped to multiple OFDM symbols.

[0188] In some embodiments, OOK symbol division is performed based on OFDM symbols; and the second bit is modulated into an OOK symbol. Here, modulating the second bit into an OOK symbol can be understood as mapping the second bit into an OOK symbol.

[0189] OOK symbol division based on OFDM symbols may include but is not limited to at least one of the following:

[0190] An OFDM symbol is divided into M OOK symbols. In this embodiment, the CPs of the OOK symbols and the OFDM symbols do not overlap in the time domain. In this case, M can be a positive integer greater than or equal to 2.

[0191] An OFDM symbol and its corresponding CP are divided into M OOK symbols. In this embodiment, the OOK symbol and the CP of the OFDM symbol overlap in the time domain, that is, the CP is part of the OOK symbol.

[0192] Divide one OFDM symbol into one OOK symbol; in this case, one OFDM symbol carries one OOK symbol;

[0193] An OFDM symbol and a CP corresponding to the OFDM symbol are divided into an OOK symbol. In this case, one OFDM symbol and one CP carry one OOK symbol.

[0194] In some embodiments, OOK symbols include: an on symbol and an off symbol. The on symbol and the off symbol map different sample values ​​to OFDM symbols. For example, the sample values ​​have different average powers. These different average powers may correspond to different information bits and / or information. The OOK on symbol can be written as an OOK on symbol. The OOK off symbol can be written as an OOK off symbol.

[0195] In some embodiments, before determining the number of OOK symbols into which an OFDM symbol is divided, it is determined whether the CP of the OFDM symbol is mapped to an OOK symbol of OOK modulation.

[0196] If it is determined to map the CP of the OFDM symbol to an OOK symbol of OOK modulation, the OOK symbol is divided based on the OFDM symbol and its corresponding CP.

[0197] If it is determined not to map the CP of the OFDM symbol to the OOK symbol of OOK modulation, the OOK symbol is divided based on the OFDM symbol.

[0198] In this way, considering the particularity of OOK modulation, the CP can be specially processed when modulating OFDM symbols to reduce the interference to the information carried by OFDM symbols caused by improper CP settings, thereby improving the transmission reliability and other transmission quality of OFDM symbols.

[0199] In some embodiments, one second bit is modulated into one OOK symbol. Using one second bit to correspond to one OOK symbol can improve coding efficiency, increase the amount of information carried by one OFDM, and improve the effective utilization rate of OFDM symbols.

[0200] In some other embodiments, one second bit is mapped to multiple OOK symbols. Using one second bit to correspond to multiple OOK symbols can improve the robustness of the downlink transmission obtained by encoding.

[0201] It is worth noting that the M OOK symbols can be equally divided into OFDM symbols or unequally divided into OFDM symbols. If the M OOK symbols are unequally divided into OFDM symbols, the time domain lengths of different OOK symbols are different.

[0202] S2103: The network device sets a CP between different OFDM symbols.

[0203] In some embodiments, the CP of the OFDM symbol is set according to the sample value of the OOK symbol mapped to the last second bit among the M second bits.

[0204] Exemplarily, when the second bit is obtained by encoding according to the first mapping relationship and the second mapping relationship, the CP of the OFDM symbol is set according to the sampling value of the OOK symbol mapped to the last second bit among the M second bits.

[0205] For example, the CP of the OFDM symbol is set according to the sampling value of the end part of the OOK symbol of the last bit in the Mth second bit, which is equal to the CP, so that the sequence corresponding to an OFDM symbol and its corresponding CP forms a sequence with the same beginning and end, avoiding interference between subcarriers.

[0206] As another example, when the second bit is obtained according to the third mapping relationship, the CP is directly set at the end of the OFDM symbol. In this way, an OFDM symbol and its corresponding CP can also form a sequence with the same beginning and end, avoiding interference between subcarriers.

[0207] In some embodiments, the information bit may be an information bit of a power saving signal.

[0208] In some embodiments, the information bits may be information bits of LP-WUS.

[0209] Exemplarily, the LP-WUS may wake up the terminal from the first state to the second state.

[0210] The power consumption of the terminal in the first state is lower than the power consumption of the terminal in the second state.

[0211] In some embodiments, the terminal has at least two transceivers, namely a first transceiver and a second transceiver. The power consumption of the first transceiver is lower than that of the second transceiver. In a first state, the first transceiver of the terminal is in an active state and the second transceiver is in a dormant state. In a second state, the second transceiver of the terminal is in an active state.

[0212] In some embodiments, the second transceiver may be a main radio (RM) of the terminal.

[0213] In some other embodiments, the first transceiver may be a low power receiver (LR) of the terminal.

[0214] In the first terminal mode, the terminal may use the LR to monitor the LP-WUS.

[0215] In some embodiments, the power saving signal may further include a paging advance indicator and an indicator light indicating that the terminal enters the next one or more discontinuous reception activation periods.

[0216] In some implementations, the power saving signal may be a physical layer signal.

[0217] S2104: The network device sends downlink.

[0218] In some embodiments, after the CP setting of the OFDM symbol is completed, radio frequency modulation is performed and downlink transmission is radiated.

[0219] S2105: The terminal detects downlink reception on the OFDM symbol.

[0220] In some embodiments, downlink reception is detected on OFDM symbols in the time domain according to the configuration and / or scheduling of the network device.

[0221] In some embodiments, downlink reception is detected in OFDM symbols in the time domain according to a modulation scheme configured and / or scheduled by the network.

[0222] In some embodiments, if the modulation mode is OOK modulation, OOK symbol detection is performed on OFDM symbols in the time domain, that is, the downlink reception is OOK symbols.

[0223] In some embodiments, if the modulation mode is OOK modulation, envelope detection of the OOK symbol is performed on the OFDM symbol in the time domain. The envelope detection is related to the amplitude or energy of the OOK symbol.

[0224] In some embodiments, if the modulation mode is OOK modulation, the time domain sequence carried by the OOK symbol is detected on the OFDM symbol in the time domain.

[0225] In some embodiments, if the modulation mode is OOK modulation, the frequency domain sequence carried by the OOK symbol is detected on the OFDM symbol in the time domain.

[0226] In some embodiments, before detecting downlink reception on an OFDM symbol, the terminal may first determine a detection method for the OFDM symbol.

[0227] The OFDM symbols are detected according to the determined detection mode.

[0228] In some embodiments, before detecting the power saving signal, a detection method of the OFDM symbol is determined.

[0229] In some embodiments, the power saving signal includes but is not limited to the aforementioned LP-WUS.

[0230] In some embodiments, the detection method includes but is not limited to at least one of the following:

[0231] The first method is to detect the cyclic prefix CP of the OFDM symbol as part of OFDM;

[0232] The second method is to detect OFDM symbols while ignoring the CP of the OFDM symbols.

[0233] In some embodiments, if the OFDM symbol and the CP together correspond to an OOK symbol, it is determined that the OFDM symbol is detected using the first method.

[0234] In some embodiments, if the CP and the OFDM symbol do not correspond to the OOK symbol, it may be determined to use the second method to detect the OFDM symbol.

[0235] In some embodiments, if the network device supports two mapping modes: mapping the CP to OOK symbols and not mapping the CP to OOK symbols, the terminal may first determine the detection mode of the OFDM symbols before detecting downlink reception on the OFDM symbols.

[0236] In some embodiments, if the terminal supports two mapping modes, namely, mapping the CP to OOK symbols and not mapping the CP to OOK symbols, the terminal may first determine the detection mode of the OFDM symbols before detecting downlink reception on the OFDM symbols.

[0237] S2106: The terminal demodulates the downlink reception to obtain M fourth bits.

[0238] In some embodiments, the terminal receives a downlink transmission, ie, successfully detects a downlink reception, and then demodulates the downlink reception to obtain M fourth bits.

[0239] In some embodiments, downlink reception of one OFDM symbol is demodulated to obtain M fourth bits.

[0240] In some embodiments, downlink reception of M OFDM symbols is demodulated to obtain M fourth bits.

[0241] Exemplarily, the fourth bit here corresponds to the aforementioned second bit and can be considered as the coding bit of the sending end.

[0242] In some embodiments, the values ​​of the first fourth bit and the last fourth bit of the M fourth bits mapped on an OFDM symbol are the same; M is a positive integer greater than or equal to 2.

[0243] Exemplarily, if M fourth bits are demodulated on one OFDM symbol, the values ​​of the first fourth bit and the last fourth bit of the M fourth bits mapped on one OFDM symbol are the same, and M is greater than or equal to 2.

[0244] Exemplarily, M fourth bits are demodulated on M OFDM symbols, and the values ​​of the first fourth bit and the last fourth bit of the M fourth bits are the same or different.

[0245] In some embodiments, the downlink reception on the demodulated OFDM symbol obtains M fourth bits.

[0246] In some embodiments, the OFDM symbol and the downlink reception on the CP are demodulated to obtain M fourth bits.

[0247] S2107: The terminal decodes M fourth bits to obtain N fifth bits.

[0248] In some embodiments, the fifth bit here corresponds to the aforementioned first bit. Exemplarily, the fifth bit can also be an information bit.

[0249] In one embodiment, N is equal to 1, that is, multiple fourth bits are decoded into one fifth bit.

[0250] In some embodiments, N is greater than 1, ie, multiple fourth bits are decoded into multiple fifth bits.

[0251] The fifth bit can be used to determine the content of the downlink reception indication, such as the power-saving signal.

[0252] For example, when the power saving signal is LP-WUS, the fifth bit may indicate whether to wake up the terminal. For another example, when the power saving signal is LP-WUS, the fifth bit may indicate whether to wake up the MR, when to wake up the MR, and other information.

[0253] As shown in FIG3 , an embodiment of the present disclosure provides a modulation method, which is performed by a network device and includes:

[0254] S3101: Encode N first bits into M second bits.

[0255] In some embodiments, N is a positive integer.

[0256] In some embodiments, M is a positive integer greater than or equal to N.

[0257] The optional implementation of S3101 here can refer to any optional implementation of S2101 corresponding to Figure 2.

[0258] S3102: Map the M second bits to OFDM symbols.

[0259] The optional implementation of S3102 here can refer to any optional implementation of S2102 corresponding to Figure 2.

[0260] In some embodiments, encoding the N first bits into the M second bits comprises at least one of:

[0261] When N is equal to 1, an information ratio is encoded into M second bits according to the first mapping relationship;

[0262] When N is greater than 1, the plurality of first bits are encoded into M second bits according to the second mapping relationship; M / N is a positive integer greater than or equal to 2.

[0263] In some embodiments, the OOK symbols are divided and the M second bits are mapped to the OOK symbols.

[0264] In some embodiments, when performing OOK modulation, it is determined whether to map the CP of the OFDM symbol to an OOK symbol of OOK modulation.

[0265] If it is determined to map the CP of the OFDM symbol to an OOK symbol of OOK modulation, the OOK symbol is divided based on the OFDM symbol and its corresponding CP.

[0266] If it is determined not to map the CP of the OFDM symbol to the OOK symbol of OOK modulation, the OOK symbol is divided based on the OFDM symbol.

[0267] In some embodiments, the OFDM symbol is divided into M OOK symbols, and then the M second bits are modulated onto the M OOK symbols.

[0268] In some embodiments, an OFDM symbol is divided into one OOK symbol, and then the M second bits are mapped to the OOK symbols of M OFDM symbols that are continuously distributed in the time domain.

[0269] In some embodiments, a second bit is mapped to an OOK symbol.

[0270] In some embodiments, one second bit is mapped to multiple OOK symbols.

[0271] In some embodiments, when OOK modulation is used, OOK symbol division is performed based on whether the CP and the OFDM symbol are mapped together into OOK symbols. The OOK symbols are symbols generated by OOK modulation.

[0272] In some embodiments, it is determined that the CP and the OFDM symbol together correspond to an OOK symbol, and the OFDM symbol and the CP of the OFDM symbol are divided into one or more OOK symbols.

[0273] In some embodiments, it is determined that the CP and the OFDM symbol do not correspond to OOK symbols, and the OFDM symbol is divided into one or more OOK symbols.

[0274] In some embodiments, when OOK modulation is used and an OOK symbol is mapped to one or more OFDM symbols, OOK symbol division is performed based on whether the CP and the OFDM symbol are mapped together to OOK symbols. The OOK symbols are symbols generated by OOK modulation.

[0275] S3103: Set CP between different OFDM symbols.

[0276] The optional implementation of S3103 here can refer to any optional implementation of S2103 corresponding to Figure 2.

[0277] Exemplarily, when M is greater than 2 and one OFDM symbol is mapped to M second-bit OOK symbols, the CP of the OFDM symbol is set according to the sampling value of the OOK symbol mapped to the last second bit among the M second bits.

[0278] Exemplarily, when M is equal to 1 or an OOK symbol of one second bit is mapped to one OFDM symbol, the CP of the OFDM symbol is set according to the sampling value of the last OOK symbol mapped to the OFDM symbol.

[0279] As shown in FIG4 , an embodiment of the present disclosure provides a demodulation method, which is performed by a terminal and includes:

[0280] S4101: Detect downlink reception on OFDM symbols.

[0281] The optional implementation of S4101 here can refer to any optional implementation corresponding to S2105 corresponding to Figure 2.

[0282] In some embodiments, if the terminal supports two or more detection methods, the detection method is determined first.

[0283] In some embodiments, the terminal supports only one detection mode, and thus does not need to determine the detection mode before detecting downlink reception.

[0284] Different detection methods correspond to whether to ignore the CP of the OFDM symbol.

[0285] In some embodiments, downlink reception is detected on corresponding OFDM symbols according to the configuration and / or scheduling of the network device.

[0286] In some embodiments, before detecting downlink reception on an OFDM symbol, the terminal may first determine a detection method for the OFDM symbol.

[0287] The OFDM symbols are detected according to the determined detection mode.

[0288] In some embodiments, before detecting the power saving signal, a detection method of the OFDM symbol is determined.

[0289] In some embodiments, the power saving signal includes but is not limited to the aforementioned LP-WUS.

[0290] In some embodiments, the detection method includes but is not limited to at least one of the following:

[0291] The first method is to detect the cyclic prefix CP of the OFDM symbol as part of OFDM;

[0292] The second method is to detect OFDM symbols while ignoring the CP of the OFDM symbols.

[0293] In some embodiments, if the OFDM symbol and the CP together correspond to an OOK symbol, it is determined that the OFDM symbol is detected using the first method.

[0294] In some embodiments, if the CP and the OFDM symbol do not correspond to the OOK symbol, it may be determined to use the second method to detect the OFDM symbol.

[0295] In some embodiments, if the network device supports two mapping modes: mapping the CP to OOK symbols and not mapping the CP to OOK symbols, the terminal may first determine the detection mode of the OFDM symbols before detecting downlink reception on the OFDM symbols.

[0296] In some embodiments, if the terminal supports two mapping modes, namely, mapping the CP to OOK symbols and not mapping the CP to OOK symbols, the terminal may first determine the detection mode of the OFDM symbols before detecting downlink reception on the OFDM symbols.

[0297] In some embodiments, downlink reception is detected on OFDM symbols according to the modulation scheme.

[0298] In some embodiments, when the modulation scheme is OOK modulation, OOK symbols are detected on OFDM symbols.

[0299] S4102: Demodulate the downlink reception to obtain M fourth bits.

[0300] The optional implementation of S4102 here can refer to any optional implementation corresponding to S2106 corresponding to Figure 2.

[0301] In some embodiments, S4102 may include: demodulating the OOK symbol to obtain the fourth bit.

[0302] S4103: Decode M fourth bits to obtain N fifth bits.

[0303] The optional implementation of S4103 here can refer to any optional implementation corresponding to S2106 corresponding to Figure 2.

[0304] Assuming that an OFDM symbol is divided into M OOK symbols, and assuming that each information bit is mapped to the M OOK symbols of an OFDM symbol after encoding, the CP is different from the adjacent OOK symbols, which is not conducive to the transmission performance of LP-WUS. The embodiment of the present disclosure introduces an encoding method for information bits to satisfy the value of the first (i.e., the first) coded bit and the last (i.e., the last) coded bit after the OFDM symbol is encoded. As a result, the CP and its adjacent OOK symbols have an on (ON) or off (OFF) state. When the coded bit is mapped to an OFDM symbol, the CP is the same as the on (ON) or off (OFF) state of the adjacent OOK symbol, thereby improving the transmission performance of LP-WUS.

[0305] For example, n information bits are mapped to 4k coded bits and then to 4k OOK symbols, where the first and last coded bits have the same value. n is greater than or equal to 1 and k = 1, 2, 3, ...

[0306] Table 1 shows how to map one information bit to four code bits. Using this mapping ensures that one bit maps to the same first and fourth bits, and thus to OOK symbols with the same on or off state. When four code bits are mapped to four OOK symbols in one OFDM symbol, the CP has the same on or off state as adjacent OOK symbols.

[0307] Table 2 shows a method for mapping two information bits to eight code bits. This method ensures that the two bits map to the same first and eighth bits, and thus to OOK symbols with the same ON or OFF state. When eight code bits are mapped to eight OOK symbols in one OFDM symbol, the CP has the same ON or OFF state as the adjacent OOK symbols. For any two information bits, the code bits in Table 2 can be obtained using the following method:

[0308] 1) First, each information bit is encoded and concatenated according to the mapping relationship 1 in Table 1;

[0309] 2) The 8 coded bits after concatenation are cyclically shifted. In some embodiments, the cyclic shift is performed according to a cyclic shift parameter. For example, the cyclic shift parameter may include the direction of the cyclic shift and / or the cyclic shift length. Exemplarily, the 8 coded bits are cyclically shifted two bits to the left. The cyclic shift parameter may include the cyclic shift direction, for example, the cyclic shift direction may include left or right, and the cyclic shift length may not be limited to ensure that the values ​​of the first and last coded bits after the cyclic shift are equal. After receiving the downlink transmission, the terminal may attempt modulation and decoding based on different cyclic shift lengths. For example, the cyclic shift parameter may include both the cyclic shift direction and the cyclic shift length, which can facilitate terminal demodulation and decoding efficiency. For another example, the cyclic shift parameter may include the cyclic shift length. In this case, after receiving the downlink transmission, the terminal may attempt to decode by cyclic shifting in both directions.

[0310] With this mapping relationship, the first, second, seventh, and eighth coded bits among the eight coded bits carry the first information bit, and the other coded bits carry the second information bit.

[0311] Method 1:

[0312] An OFDM symbol excluding the CP is divided into 4k OOK symbols, 4k coded bits are obtained by encoding n information bits, and these 4k coded bits are mapped to 4k OOK symbols.

[0313] The above-mentioned operation of dividing the 4k OOK symbols may be to divide the OFDM symbols equally, or may be to divide the OFDM symbols unequally.

[0314] For example, one information bit is encoded into four bits and mapped to four OOK symbols within one OFDM symbol. According to this method, when LP-WUS is mapped to multiple OFDM symbols, a CP is inserted every 4k OOK symbols.

[0315] FIG1C is a schematic diagram of equally dividing the OFDM symbols except the CP and performing encoding and OOK mapping according to the method in Table 1. It is assumed here that the coding bit 1 is mapped to the OOK on symbol and the coding bit 0 is mapped to the OOK off symbol. In FIG1C (1), the coding bits 1001 are mapped to the OOK symbols (ON, OFF, OFF, ON) respectively. The CP is the same as the latter part of the last OOK on symbol, that is, the CP also transmits a signal, thus being consistent with the first OOK on symbol. Similarly, in FIG1C (2), the CP is also kept consistent with the first OOK on symbol for the coding bits 0110. Using this method of dividing the OOK symbols, the sequence carried on the OOK symbol can be defined on one OOK symbol, and the sequences on multiple OOK on symbols divided within one OFDM symbol can be the same or different.

[0316] Alternatively, the sequence carried on the OOK symbol can be defined on all OOK on symbols of an OFDM symbol. That is, an OFDM symbol is divided into N OOK symbols, and the length of the sequence is determined by N / 2 OOK symbols. For example, in Figure 1C(2), the sequence is directly mapped to two OOK symbols, namely OOK-2 and OOK-3. In 1C(2), the first half of the sequence is mapped to OOK-1, and the second half is mapped to OOK-4. Alternatively, the sequence carried on the OOK symbol can be defined on an OOK on symbol and an OOK off symbol. That is, the length of the sequence is determined by two OOK symbols. The sequence here may correspond to the value sequence of the aforementioned second bit.

[0317] In another embodiment, the sequence carried by the OOK symbol can be defined on all OOK symbols of an OFDM symbol. That is, the length of the sequence is determined by the entire OFDM symbol. For example, referring to FIG1C(1), the portion of the available sequence corresponding to the OOK symbols OOK-1 and OOK-4 is a non-zero subsequence, and the other elements are 0. Referring to FIG1C(2), the portion of the available sequence corresponding to the OOK symbols OOK-2 and OOK-3 is a non-zero subsequence, and the other elements are 0.

[0318] Method 2:

[0319] An OFDM symbol including the CP is divided into 4k OOK symbols, and the 4k coded bits after encoding n information bits are mapped to 4k OOK symbols. The above-mentioned operation of dividing the 4k OOK symbols can be to divide the OFDM symbols equally or unequally. For example, one information bit is encoded into 4 bits and mapped to 4 OOK symbols within one OFDM symbol. According to this method, when the LP-WUS is mapped to multiple OFDM symbols, the influence of the CP on the OOK pattern is eliminated, that is, there is no additional gap between the OOK symbols divided on multiple OFDM symbols, thereby simplifying the behavior of the LP-WUR to detect OOK symbols.

[0320] FIG1D is a schematic diagram of equally dividing the OFDM symbol including the CP and performing encoding and OOK mapping according to the method in Table 1. As in FIG1D , it is assumed here that the coded bit 1 is mapped to the OOK on symbol and the coded bit 0 is mapped to the OOK off symbol. In FIG1D (1), the coded bits 1001 are mapped to the OOK symbols (ON, OFF, OFF, ON) respectively. The CP is the same as the latter part of the last OOK on symbol, that is, the CP also transmits a signal, thereby being consistent with the first OOK on symbol. Similarly, in FIG1D (2), the coded bits 0110 are also kept consistent with the CP of the first OOK on symbol.

[0321] This OOK symbol division method ensures that the beginning and ending points of the first and last OOK symbols within an OFDM symbol remain consistent, achieving the effect of adding a CP. The sequence carried by the OOK symbol can be defined over the time period X of an OOK symbol without the CP, where X = T / N - Tcp.

[0322] T is the total duration of the OFDM symbol including the CP, and N is the number of OOK symbols into which an OFDM symbol is divided, as shown in 1-part1 of Figure 1D(1). The sequences on multiple OOK on symbols divided within an OFDM symbol can be the same or different. Alternatively, the sequence carried on the OOK symbol can be defined in time period Y, where Y is the duration of all OOK on symbols of an OFDM symbol minus the CP. For example, Y = T / 2-Tcp. Alternatively, the sequence carried on the OOK symbol can be defined in time period Z. Time period Z is the duration of an OFDM symbol minus the CP.

[0323] In the case where one OFDM symbol is divided into only one OOK symbol, the M OOK symbols after one information bit is encoded are sequentially mapped to M consecutive OFDM symbols.

[0324] The CPs of the M OFDM symbols may not be part of the OOK symbols, meaning the receiver detects OOK symbols only on OFDM symbols other than the CPs. Alternatively, each CP and associated OFDM symbol may constitute an OOK symbol, allowing the receiver to detect OOK symbols on OFDM symbols containing the CPs, thereby improving detection performance.

[0325] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations of other embodiments.

[0326] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations of other embodiments.

[0327] The embodiments of the present disclosure also provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device or a core network device) in any of the above methods.

[0328] It should be understood that the division of the various units or modules in the above devices is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above devices, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0329] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit, and the logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable, such as a hardware circuit implemented by a processor as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0330] FIG5A is a network device provided by an embodiment of the present disclosure, wherein the network device includes:

[0331] The processing module 5101 is configured to encode N first bits into M second bits; N is a positive integer; M is a positive integer greater than N; the first second bit and the last second bit of the M second bits have the same value; and the M second bits are modulated onto an OFDM symbol.

[0332] In some embodiments, the processing module may be configured to execute any steps related to information processing in the modulation method performed by the network device.

[0333] In some embodiments, the network device may further include: a sending module and / or a receiving module.

[0334] In some embodiments, the sending module and / or the receiving module may correspond to a network interface and / or a transceiver antenna of a network device.

[0335] In some embodiments, the processing module is configured to perform at least one of the following:

[0336] When N is equal to 1, one first bit is encoded into M second bits according to the first mapping relationship;

[0337] When N is greater than 1, sequentially encode N first bits according to the first mapping relationship to obtain a third bit, concatenate the third bits of the N first bits, and cyclically shift the concatenated third bits to obtain M second bits;

[0338] When N is greater than 1, multiple first bits are jointly encoded into M second bits according to the second mapping relationship; M / N is a positive integer greater than or equal to 2.

[0339] In some embodiments, the processing module is configured to divide the OFDM symbol into M OOK symbols; and modulate the M second bits onto the M OOK symbols, wherein one second bit is mapped to one OOK symbol.

[0340] In some embodiments, the processing module is configured to divide the OFDM symbol and the cyclic prefix CP of the OFDM symbol into M OOK symbols; modulate the M second bits onto the M OOK symbols; wherein one second bit is mapped to one OOK symbol.

[0341] In some embodiments, the processing module is further configured to set the CP of the OFDM symbol according to the sampling value of the OOK symbol mapped to the last second bit among the M second bits.

[0342] In some embodiments, the processing module is configured to encode N first bits of the low power consumption wake-up signal LP-WUS into M second bits.

[0343] As shown in FIG5B , an embodiment of the present disclosure provides a terminal, wherein the terminal includes:

[0344] The receiving module 5201 is configured to detect downlink reception on an OFDM symbol; wherein one OFDM symbol is mapped to M fourth bits;

[0345] The processing module 5202 is configured to demodulate the downlink reception to obtain M fourth bits; wherein, the first fourth bit and the last fourth bit of the M fourth bits mapped on an OFDM symbol have the same value; M is a positive integer greater than or equal to 2; decode the M fourth bits to obtain N fifth bits; N is a positive integer less than M.

[0346] In some embodiments, the processing module may be used by the terminal to execute steps related to information processing in any demodulation method.

[0347] In some embodiments, the terminal may further include: a sending module.

[0348] In some embodiments, the sending module and / or the receiving module may correspond to a network interface and / or a transceiver antenna of the terminal.

[0349] In some embodiments, the sending module may be used by the terminal to execute steps related to information sending in any demodulation method.

[0350] In some embodiments, the receiving module may be used by the terminal to execute steps related to information transmission in any demodulation method.

[0351] In some embodiments, the processing module is configured to perform at least one of the following:

[0352] Decoding the M fourth bits according to the first mapping relationship to obtain a fifth bit;

[0353] The M fourth bits are jointly decoded according to the second mapping relationship to obtain multiple fifth bits.

[0354] In some embodiments, the downlink reception includes OOK symbols.

[0355] In some embodiments, an OFDM symbol is divided into M OOK symbols; one OOK symbol is mapped to one fourth bit. The processing module is further configured to remove a cyclic prefix (CP) between two adjacent OFDM symbols in the downlink reception before demodulating the downlink reception to obtain the M fourth bits.

[0356] In some embodiments, an OFDM symbol and a CP corresponding to the OFDM symbol are divided into M OOK symbols, and one OOK symbol is mapped to a fourth bit.

[0357] As shown in FIG5C , an embodiment of the present disclosure provides a terminal, wherein the terminal includes:

[0358] The receiving module 5301 is configured to determine a detection method of the OOK symbol;

[0359] The processing module 5302 is configured to detect OOK symbols detected on N OFDM symbols continuously distributed in the time domain according to a detection method; wherein one OFDM symbol is divided into one or more OOK symbols;

[0360] The demodulator detects the OOK symbols, and one OOK symbol is mapped to one coding bit.

[0361] In some embodiments, the processing module may be used by the terminal to execute steps related to information processing in any demodulation method.

[0362] In some embodiments, the terminal may further include: a sending module.

[0363] In some embodiments, the sending module and / or the receiving module may correspond to a network interface and / or a transceiver antenna of the terminal.

[0364] In some embodiments, the sending module may be used by the terminal to execute steps related to information sending in any demodulation method.

[0365] In some embodiments, the receiving module may be used by the terminal to execute steps related to information transmission in any demodulation method.

[0366] In some embodiments, the detection method includes at least one of the following:

[0367] The first method is to detect the cyclic prefix CP of the OFDM symbol as part of OFDM;

[0368] The second method is to detect OFDM symbols while ignoring the CP of the OFDM symbols.

[0369] In some embodiments, the processing module is configured to determine a detection method of OFDM symbols when performing a low power consumption wake-up signal LP-WUS.

[0370] An embodiment of the present disclosure further provides a communication device, which may include: one or more processors; wherein the processor is used to call instructions to enable the communication device to execute the modulation and demodulation method that can be implemented in any of the aforementioned embodiments.

[0371] 6A and / or 6B , the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memories 8102 may be located outside the communication device 8100.

[0372] The communication device may be the aforementioned terminal and network device. In some embodiments, the network device may be a master node and / or an auxiliary node.

[0373] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the communication steps such as sending and receiving in the above method are performed by the transceiver 8103, and the other steps are performed by the processor 8101.

[0374] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, and transceiver circuit may be used interchangeably; the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be used interchangeably; and the terms receiver, receiving unit, receiver, and receiving circuit may be used interchangeably.

[0375] Optionally, the communication device 8100 further includes one or more interface circuits 8104, which are connected to the memory 8102. The interface circuits 8104 can be used to receive signals from the memory 8102 or other devices, and can be used to send signals to the memory 8102 or other devices. For example, the interface circuits 8104 can read instructions stored in the memory 8102 and send the instructions to the processor 8101.

[0376] The communication device 8100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 6A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: (1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0377] 6B is a schematic diagram of the structure of a chip 8200 provided in an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 8200 shown in FIG6B , but the present disclosure is not limited thereto.

[0378] The chip 8200 includes one or more processors 8201, and the processor 8201 is used to call instructions to enable the chip 8200 to execute any of the above modulation and demodulation methods.

[0379] In some embodiments, chip 8200 further includes one or more interface circuits 8202, which are connected to memory 8203. Interface circuit 8202 can be used to receive signals from memory 8203 or other devices, and can be used to send signals to memory 8203 or other devices. For example, interface circuit 8202 can read instructions stored in memory 8203 and send the instructions to processor 8201. Optionally, the terms interface circuit, interface, transceiver pin, and transceiver are interchangeable.

[0380] In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memories 8203 may be outside the chip 8200.

[0381] The present disclosure also provides a storage medium having instructions stored thereon, which, when executed on the communication device 8100, causes the communication device 8100 to execute any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but may also be a transient storage medium.

[0382] The present disclosure also provides a program product, which, when executed by the communication device 8100, enables the communication device 8100 to perform any of the above modulation and demodulation methods. Optionally, the program product is a computer program product.

[0383] The present disclosure also provides a computer program, which, when executed on a computer, enables the computer to execute any one of the above modulation and demodulation methods.

[0384] Other embodiments of the presently disclosed embodiments will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the presently disclosed embodiments that follow the general principles of the presently disclosed embodiments and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered as exemplary only, with the true scope and spirit of the presently disclosed embodiments being indicated by the following claims.

[0385] It should be understood that the embodiments of the present disclosure are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present disclosure is limited only by the appended claims.

Claims

1. A modulation method, wherein, Performed by a network device, the method includes: Encoding N first bits into M second bits; N is a positive integer; M is a positive integer greater than N; the values of the first and last second bits among the M second bits are the same; Modulating the M second bits onto an orthogonal frequency division multiplexing (OFDM) symbol.

2. The method according to claim 1, wherein The encoding of N first bits into M second bits includes at least one of the following: When N equals 1, encoding one of the first bits into M second bits according to a first mapping relationship; When N is greater than 1, encoding N first bits in sequence according to the first mapping relationship to obtain third bits, concatenating the third bits of the N first bits, and cyclically shifting the concatenated third bits to obtain the M second bits; When N is greater than 1, jointly encoding multiple first bits into the M second bits according to a second mapping relationship; M and N are positive integers greater than or equal to 2.

3. The method according to claim 1 or 2, wherein The modulating of the M second bits onto an OFDM symbol includes: Dividing the OFDM symbol into M binary on-off keying (OOK) symbols; Modulating the M second bits onto the M OOK symbols, where one of the second bits is mapped to one of the OOK symbols.

4. The method according to claim 1 or 2, wherein The modulating of the M second bits onto an OFDM symbol includes: Dividing the OFDM symbol and its cyclic prefix (CP) into M OOK symbols; Modulating the M second bits onto the M OOK symbols; where one of the second bits is mapped to one of the OOK symbols.

5. The method according to claim 3 or 4, wherein The method further includes: Setting the CP of the OFDM symbol according to the sampling value of the OOK symbol mapped by the last second bit among the M second bits.

6. The method according to any one of claims 1 to 5, wherein, The encoding of N first bits into M second bits includes: Encoding N first bits of a low-power wake-up signal (LP-WUS) into M second bits.

7. A demodulation method, wherein, Performed by a terminal, the method includes: Detecting a downlink reception on an OFDM symbol, where one OFDM symbol is mapped to M fourth bits; Demodulating the downlink reception to obtain M fourth bits; where the values of the first and last fourth bits among the M fourth bits mapped on one OFDM symbol are the same; M is a positive integer greater than or equal to 2; Decoding the M fourth bits to obtain N fifth bits; N is a positive integer less than M.

8. The method according to claim 7, wherein The decoding of the M fourth bits to obtain N fifth bits includes one of the following: Decoding the M fourth bits according to a first mapping relationship to obtain one of the fifth bits; Jointly decoding the M fourth bits according to a second mapping relationship to obtain multiple fifth bits.

9. The method according to claim 7 or 8, wherein The downlink reception includes binary on-off keying (OOK) symbols.

10. The method according to claim 9, wherein One OFDM symbol is divided into M of the OOK symbols; One of the OOK symbols is mapped to one of the fourth bits; the method includes: Before demodulating the M fourth bits obtained from the downlink reception, remove the cyclic prefix CP between two adjacent OFDM symbols in the downlink reception.

11. The method according to claim 9, wherein, One OFDM symbol and the CP corresponding to the OFDM symbol are divided into M OOK symbols, and one OOK symbol is mapped to one fourth bit.

12. A demodulation method, wherein, Executed by a terminal, the method includes: Determine the detection method for binary on-off keying (OOK) symbols; According to the detection method, detect the OOK symbols detected on N orthogonally frequency-division multiplexed (OFDM) symbols that are continuously distributed in the time domain; one OFDM symbol is divided into one or more of the OOK symbols; Demodulate the detected OOK symbols, and map one OOK symbol to one encoded bit.

13. The method according to claim 12, wherein, The detection method includes at least one of the following: The first method is: Detect the cyclic prefix CP of the OFDM symbol as part of the OFDM. The second method is: Detect the OFDM symbol while ignoring the CP of the OFDM symbol.

14. The method according to claim 12 or 13, wherein, The determination of the detection method for the orthogonally frequency-division multiplexed OFDM symbols includes: Determine the detection method for the OFDM symbol when performing a low-power wake-up signal (LP-WUS).

15. A network device, wherein, Includes: A processing module, configured to encode N first bits into M second bits; N is a positive integer; M is a positive integer greater than N; The values of the first and last second bits among the M second bits are the same; Modulate the M second bits onto one orthogonally frequency-division multiplexed OFDM symbol.

16. A terminal, wherein, Includes: A receiving module, configured to detect a downlink reception on an orthogonally frequency-division multiplexed OFDM symbol; A processing module, configured to demodulate the downlink reception to obtain M fourth bits; among them, the values of the first and last fourth bits among the M fourth bits mapped on one OFDM symbol are the same; M is a positive integer greater than or equal to 2; Decode the M fourth bits to obtain N fifth bits; N is a positive integer less than M.

17. A terminal, wherein, Includes: A processing module, configured to determine the detection method for binary on-off keying (OOK) symbols, A receiving module, configured to detect the OOK symbols detected on N orthogonally frequency-division multiplexed OFDM symbols that are continuously distributed in the time domain according to the detection method; One of the orthogonally frequency-division multiplexed OFDM symbols is divided into one or more of the OOK symbols; The processing module is configured to demodulate the detected OOK symbols, and map one OOK symbol to one encoded bit.

18. A communication device, wherein, The communication device includes: One or more processors; Among them, the processor is used to call instructions to cause the communication device to execute the method according to any one of claims 1 to 6, 7 to 11, and / or 12 to 14.

19. A storage medium, wherein, The storage medium stores instructions, and when the instructions run on the communication device, it causes the communication device to execute the method according to any one of claims 1 to 6, 7 to 11, and / or 12 to 14.

20. A communication system, wherein, Includes: A network device, used to execute the method according to any one of claims 1 to 6; A terminal for performing the method according to any one of claims 7 to 11 or 12 to 14.

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