Communication method, communication device and communication system

Abstract

The present disclosure relates to the technical field of communications, and provides a communication method, a communication device and a communication system. During the process of initiating random access by an NB-IoT terminal, for NPRACH multi-user OCC multiplexing, if multiple users multiplex the same time / frequency-domain resource by means of OCCs, that is, if a first terminal and at least one second terminal multiplex the same NPRACH resource by means of OCCs, a network device can use first information to indicate an RAR corresponding to the first terminal, so that the network device sends a separate RAR to each user multiplexed by the OCCs. Additionally, on the basis of the first information, the first terminal can determine the RAR corresponding to the first terminal, so that each user multiplexed by the OCCs can clarify the corresponding RAR.

Description

Communication method, communication device and communication system Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication method, communication equipment, and communication system. Background Art

[0002] Narrowband-Internet of Things (NB-IoT) is an emerging cellular-based narrowband IoT technology in the field of physical network of things (IoT). It supports cellular data connection of low-power devices in wide area network (WAN), and is also called low-power wide area network. It has the characteristics of low cost, low power consumption and wide coverage.

[0003] Summary of the Invention

[0004] The present disclosure provides a communication method, communication device, and communication system. During the process of random access initiated by an NB-IoT terminal, for multi-user orthogonal cover code (OCC) multiplexing on the narrowband physical random access channel (NPRACH), if multiple users reuse the same time-frequency domain resources through OCC, the random access response (RAR) corresponding to the terminal can be determined.

[0005] A first aspect embodiment of the present disclosure provides a communication method, which is performed by a first terminal, where the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC. The method includes: determining first information; and determining an RAR corresponding to the first terminal based on the first information.

[0006] A second aspect embodiment of the present disclosure provides a communication method, which is performed by a network device, and the method includes: sending first information to a first terminal; wherein the first information is used to indicate the RAR corresponding to the first terminal, and the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0007] An embodiment of the third aspect of the present disclosure provides a first terminal, including: a processing module configured to determine first information; determine an RAR corresponding to the first terminal based on the first information, wherein the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0008] An embodiment of the fourth aspect of the present disclosure provides a network device, comprising: a transceiver module configured to send first information to a first terminal; wherein the first information is used to indicate the RAR corresponding to the first terminal, and the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0009] A fifth aspect embodiment of the present disclosure provides a communication device, comprising: one or more processors; wherein the processor is used to execute the method as described in the first aspect embodiment, or to execute the method as described in the second aspect embodiment.

[0010] A sixth aspect embodiment of the present disclosure provides a communication system, including: a first terminal and a network device; the first terminal executes the method as described in the first aspect embodiment, and the network device executes the method as described in the second aspect embodiment.

[0011] An embodiment of the seventh aspect of the present disclosure provides a communication method, including: a network device sends first information to a first terminal; the first terminal determines the RAR corresponding to the first terminal based on the first information; wherein the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0012] An eighth aspect embodiment of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by a processor, the method described in the first aspect embodiment or the second aspect embodiment can be implemented.

[0013] Embodiments of the present disclosure provide a communication method, communication device, and communication system. During random access initiation by an NB-IoT terminal, for NPRACH multi-user OCC multiplexing, if multiple users reuse the same time-frequency domain resources via OCC, i.e., a first terminal and at least one second terminal reuse the same NPRACH resources via OCC, a network device can use first information to indicate the RAR corresponding to the first terminal, enabling the network device to send a separate RAR to each user reused by the OCC. Furthermore, the first terminal can determine its corresponding RAR based on the first information, and thus each user reused by the OCC can clearly identify its corresponding RAR.

[0014] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0016] FIG1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure;

[0017] FIG2 is a flow chart of a communication method according to an embodiment of the present disclosure;

[0018] FIG3 is a flow chart of a communication method according to an embodiment of the present disclosure;

[0019] FIG4 is a flow chart of a communication method according to an embodiment of the present disclosure;

[0020] FIG5 is a block diagram of a communication device according to an embodiment of the present disclosure;

[0021] FIG6 is a block diagram of a communication device according to an embodiment of the present disclosure;

[0022] FIG7 is a schematic structural diagram of a communication device according to an embodiment of the present disclosure;

[0023] FIG8 is a schematic structural diagram of a chip provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] The embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure and are not to be construed as limiting the present disclosure. It should be noted that the embodiments of the present disclosure and the features in the embodiments may be combined with each other unless there is a conflict.

[0025] To facilitate understanding, the terms involved in the embodiments of the present disclosure are first introduced.

[0026] 1. Narrowband Physical Random Access Channel (NPRACH)

[0027] NPRACH is a special physical layer channel designed for NB-IoT. In NB-IoT networks, NPRACH is primarily used for the initial random access process when low-power devices (such as sensors and remote monitoring equipment) access the network.

[0028] 2. Orthogonal Cover Code (OCC)

[0029] A coding technology used for signal transmission that, through orthogonality design, can reduce or eliminate interference between signals when multiple users transmit simultaneously, thereby improving spectrum efficiency and system capacity.

[0030] 3. Random Access Response (RAR)

[0031] A random access request (RAR) is a response from a base station to a terminal's random access request in a wireless communication system. When a terminal attempts to connect to the network or resynchronize, it initiates the random access process by sending a random access preamble. For example, an NB-IoT terminal selects an unoccupied random access preamble and sends it to the base station on a designated NPRACH. Upon receiving the random access preamble, the base station identifies it and sends a RAR on a specific downlink channel.

[0032] 4. Random Access Preamble IDentifier (RAPID)

[0033] RAPID is used to identify the specific preamble sequence that a terminal sends to the base station during the random access procedure (RA). This preamble sequence is used to initiate a communication connection, and the base station distinguishes different terminals by identifying different preamble sequences.

[0034] 5. Random Access Radio Network Temporary Identifier (RA-RNTI)

[0035] The RA-RNTI is an identifier used to identify control information during the random access procedure in wireless communication systems. The RA-RNTI is assigned by the base station to the terminal and is used to decode control information related to the random access procedure in the downlink control channel.

[0036] 6. Orthogonal Cover Code Sequence Index (OCCSequence Index)

[0037] The OCC sequence index is the index of an OCC sequence, a set of code sequences used in multiple access (MA) and code division multiple access (CDMA) technologies in communication systems. These code sequences are characterized by orthogonality. That is, the inner product of any two code sequences is zero (under ideal conditions). This means that users using different code sequences can transmit signals simultaneously without interfering with each other.

[0038] The embodiments of the present disclosure provide a communication method, a communication device, and a communication system.

[0039] In a first aspect, an embodiment of the present disclosure proposes a communication method, which is performed by a first terminal, wherein the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC, and the method includes: determining first information; and determining an RAR corresponding to the first terminal based on the first information.

[0040] During the process of random access initiated by an NB-IoT terminal, for NPRACH multi-user OCC multiplexing, if multiple users reuse the same time-frequency domain resources through OCC, that is, a first terminal and at least one second terminal reuse the same NPRACH resources through OCC, the network device can use the first information to indicate the RAR corresponding to the first terminal, so that the network device sends a separate RAR to each user reused by the OCC. The first terminal can determine its corresponding RAR based on the first information, and each user reused by the OCC can then clearly know its corresponding RAR.

[0041] In conjunction with some embodiments of the first aspect, the first information includes at least one of the following:

[0042] RAPID; RA-RNTI; OCC sequence index.

[0043] This embodiment can accurately determine the RAR corresponding to the first terminal through the RAPID, and / or RA-RNTI, and / or OCC sequence index.

[0044] In conjunction with some embodiments of the first aspect, the OCC sequence index is determined by at least one of the following:

[0045] Reserved bits in the Media Access Control (MAC) RAR; Downlink Control Information (DCI) for scheduling Msg2; Demodulation Reference Signal (DMRS) for the narrowband physical downlink shared channel (NPDSCH); DMRS for the narrowband physical downlink control channel (NPDCCH); RAPID; RA-RNTI.

[0046] This embodiment can accurately determine the OCC sequence index through the reserved bits in the MAC RAR, and / or the DCI of the scheduling Msg2, and / or the DMRS of the NPDSCH, and / or the DMRS of the NPDCCH, and / or the RAPID, and / or the RA-RNTI, and then determine the RAR corresponding to the first terminal based on the OCC sequence index.

[0047] In combination with some embodiments of the first aspect, determining the OCC sequence index based on the reserved bits includes: determining the OCC sequence index based on a code point carried by the reserved bits, or determining the OCC sequence index based on a bitmap carried by the reserved bits.

[0048] This embodiment can accurately determine the OCC sequence index according to the code point carried by the reserved bits in the MAC RAR or the bitmap carried by the reserved bits, and further determine the RAR corresponding to the first terminal according to the OCC sequence index.

[0049] In combination with some embodiments of the first aspect, determining the OCC sequence index according to the DCI includes at least one of the following:

[0050] The OCC sequence index is determined according to the indication field in the DCI, where the indication field may be an existing indication field or a newly added indication field; the OCC sequence index is determined according to the time domain resources used to receive the DCI; and the OCC sequence index is determined according to the frequency domain resources used to receive the DCI.

[0051] This embodiment can accurately determine the OCC sequence index based on the indication field in the DCI of the scheduling Msg2 and / or the time-frequency domain resources used by the first terminal to receive the DCI (which have a mapping relationship with the OCC sequence index), and then determine the RAR corresponding to the first terminal based on the OCC sequence index.

[0052] In combination with some embodiments of the first aspect, determining the OCC sequence index according to the indication field in the DCI includes: determining the OCC sequence index according to a code point corresponding to the OCC sequence index in the indication field.

[0053] In this embodiment, the OCC sequence index in the indication field of the DCI of the scheduling Msg2 may be used to indicate the corresponding code point, thereby accurately determining the OCC sequence index, and further determining the RAR corresponding to the first terminal according to the OCC sequence index.

[0054] In combination with some embodiments of the first aspect, determining the OCC sequence index according to the DMRS includes at least one of the following:

[0055] The OCC sequence index is determined according to the time domain resources used by the received DMRS; the OCC sequence index is determined according to the frequency domain resources used by the received DMRS; the OCC sequence index is determined according to the sequence of the DMRS; and the OCC sequence index is determined according to the port of the DMRS.

[0056] This embodiment can accurately determine the OCC sequence index based on the time-frequency domain resources (which have a mapping relationship with the OCC sequence index) and / or the sequence of the DMRS (which has a mapping relationship with the OCC sequence index) used by the first terminal to receive the DMRS (such as the DMRS of NPDSCH and / or NPDCCH), and / or the port of the DMRS (which has a mapping relationship with the OCC sequence index), and then determine the RAR corresponding to the first terminal based on the OCC sequence index.

[0057] In conjunction with some embodiments of the first aspect, the method further includes: receiving configuration information sent by a network device; and determining, based on the configuration information, second information corresponding to different OCC sequence indices, or determining, based on a protocol agreement, the second information corresponding to different OCC sequence indices.

[0058] In order to obtain the above mapping relationships in this embodiment, the network device may indicate and determine the relationship or the relationship may be based on a protocol agreement, so as to accurately implement the above process of determining the OCC sequence index.

[0059] In conjunction with some embodiments of the first aspect, the second information includes at least one of the following:

[0060] First time-frequency domain resources, the first time-frequency domain resources include time domain resources and / or frequency domain resources used to receive the DCI; second time-frequency domain resources, the second time-frequency domain resources include time domain resources and / or frequency domain resources used to receive the DMRS; the sequence of the DMRS; the port of the DMRS.

[0061] In combination with some embodiments of the first aspect, the RAPID includes OCC sequence information.

[0062] In this embodiment, the OCC sequence index may also be included in the RAPID, and then the terminal may determine its own RAR according to the OCC sequence index in the RAPID.

[0063] In combination with some embodiments of the first aspect, the RA-RNTI includes OCC sequence information.

[0064] In this embodiment, the OCC sequence index may also be included in the RA-RNTI, and the terminal may determine its own RAR according to the OCC sequence index in the RA-RNTI.

[0065] In a second aspect, an embodiment of the present disclosure proposes a communication method, which is executed by a network device, and the method includes: sending first information to a first terminal; wherein the first information is used to indicate the RAR corresponding to the first terminal, and the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0066] During the process of random access initiated by an NB-IoT terminal, for NPRACH multi-user OCC multiplexing, if multiple users reuse the same time-frequency domain resources through OCC, that is, a first terminal and at least one second terminal reuse the same NPRACH resources through OCC, the network device can use the first information to indicate the RAR corresponding to the first terminal, so that the network device sends a separate RAR to each user reused by the OCC. The first terminal can determine its corresponding RAR based on the first information, and each user reused by the OCC can then clearly know its corresponding RAR.

[0067] In conjunction with some embodiments of the second aspect, the first information includes at least one of the following:

[0068] RAPID; RA-RNTI; OCC sequence index.

[0069] This embodiment can accurately determine the RAR corresponding to the first terminal through the RAPID, and / or RA-RNTI, and / or OCC sequence index.

[0070] In conjunction with some embodiments of the second aspect, the OCC sequence index is determined by at least one of the following:

[0071] Reserved bits in MAC RAR; DCI for scheduling Msg2; DMRS for NPDSCH; DMRS for NPDCCH; RAPID; RA-RNTI.

[0072] This embodiment can accurately determine the OCC sequence index through the reserved bits in the MAC RAR, and / or the DCI of the scheduling Msg2, and / or the DMRS of the NPDSCH, and / or the DMRS of the NPDCCH, and / or the RAPID, and / or the RA-RNTI, and then determine the RAR corresponding to the first terminal based on the OCC sequence index.

[0073] In combination with some embodiments of the second aspect, the code point carried by the reserved bit is used to determine the OCC sequence index; or, the bitmap carried by the reserved bit is used to determine the OCC sequence index.

[0074] This embodiment can accurately determine the OCC sequence index according to the code point carried by the reserved bits in the MAC RAR or the bitmap carried by the reserved bits, and further determine the RAR corresponding to the first terminal according to the OCC sequence index.

[0075] In combination with some embodiments of the second aspect, the indication field in the DCI is used to determine the OCC sequence index; and / or, the time domain resources of the DCI are used to determine the OCC sequence index; and / or, the frequency domain resources of the DCI are used to determine the OCC sequence index.

[0076] This embodiment can accurately determine the OCC sequence index based on the indication field in the DCI of the scheduling Msg2 and / or the time-frequency domain resources used by the first terminal to receive the DCI (which have a mapping relationship with the OCC sequence index), and then determine the RAR corresponding to the first terminal based on the OCC sequence index.

[0077] In combination with some embodiments of the second aspect, the OCC sequence index in the indication field indicates a corresponding code point, which is used to determine the OCC sequence index.

[0078] In this embodiment, the OCC sequence index in the indication field of the DCI of the scheduling Msg2 may be used to indicate the corresponding code point, thereby accurately determining the OCC sequence index, and further determining the RAR corresponding to the first terminal according to the OCC sequence index.

[0079] In combination with some embodiments of the second aspect, the time domain resources of the DMRS are used to determine the OCC sequence index; and / or, the frequency domain resources of the DMRS are used to determine the OCC sequence index; and / or, the sequence of the DMRS is used to determine the OCC sequence index; and / or, the port of the DMRS is used to determine the OCC sequence index.

[0080] This embodiment can accurately determine the OCC sequence index based on the time-frequency domain resources (which have a mapping relationship with the OCC sequence index) and / or the sequence of the DMRS (which has a mapping relationship with the OCC sequence index) used by the first terminal to receive the DMRS (such as the DMRS of NPDSCH and / or NPDCCH), and / or the port of the DMRS (which has a mapping relationship with the OCC sequence index), and then determine the RAR corresponding to the first terminal based on the OCC sequence index.

[0081] In conjunction with some embodiments of the second aspect, the method further includes: sending configuration information to the first terminal, the configuration information being used to indicate second information corresponding to different OCC sequence indices. Alternatively, the first terminal may further determine the second information corresponding to different OCC sequence indices based on a protocol agreement.

[0082] In order to obtain the above mapping relationships in this embodiment, the network device may indicate and determine the relationship or the relationship may be based on a protocol agreement, so as to accurately implement the above process of determining the OCC sequence index.

[0083] In conjunction with some embodiments of the second aspect, the second information includes at least one of the following:

[0084] First time-frequency domain resources, the first time-frequency domain resources include time domain resources and / or frequency domain resources used by the first terminal to receive the DCI; second time-frequency domain resources, the second time-frequency domain resources include time domain resources and / or frequency domain resources used by the first terminal to receive the DMRS; the sequence of the DMRS; the port of the DMRS.

[0085] In combination with some embodiments of the second aspect, the RAPID includes OCC sequence information.

[0086] In this embodiment, the OCC sequence index may also be included in the RAPID, and then the terminal may determine its own RAR according to the OCC sequence index in the RAPID.

[0087] In combination with some embodiments of the second aspect, the RA-RNTI includes OCC sequence information.

[0088] In this embodiment, the OCC sequence index may also be included in the RA-RNTI, and the terminal may determine its own RAR according to the OCC sequence index in the RA-RNTI.

[0089] In a third aspect, an embodiment of the present disclosure proposes a first terminal, comprising: a processing module configured to determine first information; and determining an RAR corresponding to the first terminal based on the first information, wherein the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0090] In a fourth aspect, an embodiment of the present disclosure proposes a network device, comprising: a transceiver module configured to send first information to a first terminal; wherein the first information is used to indicate the RAR corresponding to the first terminal, and the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0091] In the fifth aspect, an embodiment of the present disclosure proposes a communication device, which may be a first terminal or a network device, comprising: one or more processors; wherein the processor of the first terminal is used to execute the method described in the embodiment of the first aspect, and the processor of the network device is used to execute the method described in the embodiment of the second aspect.

[0092] In a sixth aspect, an embodiment of the present disclosure proposes a communication system, comprising: a first terminal and a network device; the first terminal executes the method described in the embodiment of the first aspect, and the network device executes the method described in the embodiment of the second aspect.

[0093] In the seventh aspect, an embodiment of the present disclosure provides a communication method, including: a network device sends first information to a first terminal; the first terminal determines the RAR corresponding to the first terminal based on the first information; wherein the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0094] In an eighth aspect, an embodiment of the present disclosure proposes a computer storage medium, wherein the computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by a processor, the method described in the embodiment of the first aspect or the embodiment of the second aspect can be implemented.

[0095] In a ninth aspect, an embodiment of the present disclosure proposes a computer program product, comprising a computer program, which, after being executed by a processor, can implement the method described in the embodiment of the first aspect or the embodiment of the second aspect.

[0096] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the embodiment of the first aspect or the embodiment of the second aspect.

[0097] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method according to the embodiment of the first aspect or the embodiment of the second aspect.

[0098] It is understandable that the first terminal, network device, communication system, and storage medium are all used to execute the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method and will not be repeated here.

[0099] The present disclosure provides a communication method, a first terminal, a network device, and a communication system. In some embodiments, the terms "communication method" and "information processing method," "information sending method," and "information receiving method" are interchangeable; the terms "communication device" and "information processing device," "information sending device," and "information receiving device" are interchangeable; and the terms "information processing system," "communication system," "information sending system," and "information receiving system" are interchangeable.

[0100] The embodiments of the present disclosure are not exhaustive and 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 steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0101] 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.

[0102] 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.

[0103] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may 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 may be understood as a singular expression or a plural expression.

[0104] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0105] In some embodiments, the terms "at least one of", "at least one of", "at least one of", "one or more", "a plurality of", "multiple", etc. can be used interchangeably.

[0106] In the embodiments of the present disclosure, descriptions such as “at least one of A, B, C…”, “A and / or B and / or C…”, etc. include the situation where any one of A, B, C… exists alone, and also include any combination of any multiple of A, B, C…, and each situation can exist alone; for example, “at least one of A, B, C” includes the situation where A exists alone, B exists alone, C exists alone, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C; for example, A and / or B includes the situation where A exists alone, B exists alone, and the combination of A and B.

[0107] In some embodiments, descriptions such as "in one case A, in another case B," or "in response to one case A, in response to another case B," may include the following technical solutions depending on the situation: executing A independently of B (in some embodiments, A); executing B independently of A (in some embodiments, B); selectively executing A and B (in some embodiments, selecting between A and B); and executing both A and B (in some embodiments, A and B). The same applies when there are more branches, such as A, B, and C.

[0108] 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 information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0109] 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.

[0110] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0111] 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.

[0112] 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.

[0113] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0114] 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", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0115] 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, narrowband Internet of Things (NB-IoT) device, etc. can be used interchangeably.

[0116] 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, it can also be called device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it can also be set as a structure in which the terminal has all or part of the functions of the access network device. In addition, language such as "uplink" and "downlink" can also be replaced by language 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.

[0117] 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.

[0118] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0119] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0120] In some embodiments, the threshold mentioned in this embodiment may be a numerical value, a constant, or some fixed value.

[0121] 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.

[0122] The correspondences shown in the tables of the present disclosure can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values, which are not limited by the present disclosure. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, in the tables of the present disclosure, the correspondences shown in certain rows may not be configured. For another example, appropriate deformation adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables may also adopt other names that can be understood by the communication device, and the values ​​or representations of the parameters may also adopt other values ​​or representations that can be understood by the communication device. When implementing the above tables, other data structures may also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables or hash tables, etc.

[0123] The predefined in the present disclosure may be understood as defined, predefined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned.

[0124] The communication method, first terminal, network device and communication system provided by the present disclosure are described in detail below with reference to the accompanying drawings.

[0125] FIG1 shows a structural diagram of a communication system according to an embodiment of the present disclosure. As shown in FIG1 , the system architecture may include a network device 11 and a first terminal 12 .

[0126] In some examples, the network device 11 may be an entity on the network side for transmitting or receiving signals. For example, the network device 11 may be a communication satellite, an evolved NodeB (eNB), a transmission reception point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the network device 11. The network device 11 provided in the embodiments of the present disclosure may be composed of a central unit (CU) and a distributed unit (DU), wherein the CU may also be referred to as a control unit. The CU-DU structure may be used to split the protocol layer of a network device, such as a base station, and the functions of some protocol layers are placed in the CU for centralized control, while the functions of the remaining part or all of the protocol layers are distributed in the DU, and the DU is centrally controlled by the CU.

[0127] In some examples, the first terminal 12 can be called an NB-IoT terminal, a terminal device (terminal), a user equipment, a mobile station (MS), a mobile terminal device (MT), etc. The first terminal 12 can also be a car with communication functions, a smart car, a mobile phone, a wearable device, a tablet computer (Pad), a computer with wireless transceiver functions, a virtual reality device, an augmented reality 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, a wireless terminal device in a smart home, etc. The embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the first terminal 12.

[0128] It can be understood that the communication processing 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 proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0129] The following embodiments of the present disclosure may be applied to the communication processing system shown in Figure 1, or a portion thereof, but are not limited thereto. The entities shown in Figure 1 are illustrative only. The communication processing system may include all or part of the entities shown in Figure 1, or may include other entities outside of Figure 1. 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, whether direct or indirect, and wired or wireless.

[0130] The embodiments of the present disclosure can be applied to satellite communications, 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 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 802.17 (WiMAX (registered trademark)), IEEE 802.18 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (WiMAX (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (WiMAX (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (registered trademark) 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 utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0131] In this embodiment, during the process of random access initiated by an NB-IoT terminal, for NPRACH multi-user OCC multiplexing, if multiple users reuse the same time-frequency domain resources through OCC, that is, a first terminal and at least one second terminal reuse the same NPRACH resources through OCC, the network device can use first information to indicate the RAR corresponding to the first terminal, so that the network device sends a separate RAR to each user reused by the OCC. The first terminal can determine its corresponding RAR based on the first information, and each user reused by the OCC can therefore clearly identify its corresponding RAR.

[0132] Furthermore, to illustrate the specific execution process of the above-mentioned communication processing system, FIG2 shows a schematic diagram of a communication method according to an embodiment of the present disclosure. The method is applied to the above-mentioned communication system, as shown in FIG2, and may include the following steps:

[0133] Step S201: A network device sends first information to a first terminal.

[0134] In some embodiments, the first terminal and the second terminal may be NB-IoT terminals, etc. The first terminal and at least one second terminal reuse the same NPRACH resources through OCC. That is, for sending NPRACH, the first terminal and these second terminals reuse the same time-frequency domain resources through OCC. For example, when the first terminal and at least one second terminal need to initiate a random access procedure, they reuse the same NPRACH resources through OCC to send NPRACH, and then send Msg1 to the network device.

[0135] In some embodiments, the first information sent by the network device to the first terminal may be used to indicate the RAR corresponding to the first terminal. For example, after receiving Msg1, the network device may return Msg2 to the first terminal, further sending the first information and multiple RARs to the first terminal. The first information may be used to indicate the RAR belonging to the first terminal among these RARs, thereby enabling the network device to send a separate RAR to the first terminal multiplexed with the OCC. The first terminal may then determine the RAR belonging to itself among the sent RARs based on the first information.

[0136] In some embodiments, the first information may include at least one of A1 to C1:

[0137] A1, RAPID; For example, during the random access process, the first terminal sends a specific preamble sequence to the network device by sending Msg1. RAPID is used to identify the preamble sequence. The network device distinguishes different terminals by identifying different preamble sequences, and can then use RAPID to distinguish the RARs of different terminals. For example, when sending NPRACH, terminals that use different OCC sequences to reuse the same NPRACH resources are sent separate RARs to these terminals. In addition, in some embodiments, RAPID may include OCC sequence information, such as the OCC sequence index may also be included in RAPID, and the terminal may determine its own RAR based on the OCC sequence index in RAPID. In some examples, this RAPID can be distinguished from traditional RAPID.

[0138] B1. RA-RNTI; For example, the RA-RNTI can be determined by the frame number of the system frame used by the first terminal to transmit the NPRACH. The network device can distinguish the RARs of different terminals based on different RA-RNTIs. For example, when transmitting NPRACH, the network device can send separate RARs to terminals that use different OCC sequences to multiplex the same NPRACH resources. In addition, in some embodiments, the RA-RNTI can include OCC sequence information. For example, the OCC sequence index can also be included in the RA-RNTI. The terminal can then determine its own RAR based on the OCC sequence index in the RA-RNTI. In some examples, this RA-RNTI can be distinguished from the traditional RA-RNTI.

[0139] C1, OCC sequence index. For example, for sending NPRACH, the first terminal and at least one second terminal multiplex the same time-frequency domain resources by using different OCC sequences. The OCC sequence index can be used to identify the OCC sequence. The network device uses different OCC sequence index indications to distinguish the RARs of different terminals. For example, when sending NPRACH, a terminal that uses different OCC sequences to multiplex the same NPRACH resources can determine its own RAR according to the OCC sequence index.

[0140] In some embodiments, different terminals can be distinguished by at least two items of A1 to C1, for example, RAPID and OCC sequence index are combined to identify the corresponding terminal; or RA-RNTI and OCC sequence index are combined to identify the corresponding terminal; or RAPID and RA-RNTI are combined to identify the RAR of the corresponding terminal, and the RAPID may be a RAPID different from the traditional RAPID (such as including the OCC sequence index), and / or the RA-RNTI may be a RA-RNTI different from the traditional RA-RNTI (such as including the OCC sequence index); or RAPID, RA-RNTI and OCC sequence index are combined to identify the corresponding terminal, etc.

[0141] In some embodiments, after determining the first information, the network device further indicates the first information to the first terminal based on certain signaling / methods, such as reserved bits in a MAC RAR. The first terminal determines which RAR belongs to itself based on the first information and the time-frequency domain resources and OCC sequence used by itself to transmit the NPRACH. There is a one-to-one mapping relationship between the first information and the OCC sequence.

[0142] Step S202: The first terminal determines its corresponding RAR according to the first information.

[0143] In some embodiments, the first terminal has already determined the RAPID, and / or RA-RNTI, and / or OCC sequence index belonging to the first terminal when sending Msg1. When the network device returns Msg2, the RAPID, and / or RA-RNTI, and / or OCC sequence index belonging to the first terminal are determined based on the first information sent by the network device, information associated with the first information is found in Msg2, and then the RAR belonging to the terminal is determined from the multiple RARs sent by the network device.

[0144] In some embodiments, the first terminal may determine the OCC sequence index through at least one item from A2 to F2.

[0145] In some embodiments, the network device may indicate the OCC sequence index to the first terminal through at least one of A2 to F2.

[0146] A2. Reserved bits in MAC RAR; In some embodiments, the OCC sequence index may be determined according to a codepoint carried by the reserved bits in the MAC RAR, or a bitmap of the reserved bits in the MAC RAR.

[0147] For example, for NB-IoT, the OCC sequence index is indicated by the reserved bits in the MAC RAR. If different values ​​carried by the reserved bits correspond to different OCC sequence indexes, the first terminal can determine the OCC sequence index by the value carried by the reserved bits in the MAC RAR.

[0148] B2, DCI for scheduling Msg2; in some embodiments, the OCC sequence index may be determined based on an indication field in the DCI for scheduling Msg2, and / or based on a time domain resource used by the first terminal to receive the DCI, and / or based on a frequency domain resource used by the first terminal to receive the DCI. In some examples, determining the OCC sequence index based on the indication field in the DCI for scheduling Msg2 may include: determining the OCC sequence index based on a codepoint corresponding to the OCC sequence index indication in the indication field.

[0149] In some examples, the first terminal may determine the OCC sequence index by using an indication field in the DCI of the scheduling Msg2. The indication field may be an existing indication field or a newly added indication field. For example, the indication field in the DCI carries an OCC sequence index value, and the OCC sequence index is determined based on the indication. In some examples, the DCI may include one or more OCC sequence index values.

[0150] In some examples, the first terminal may receive configuration information sent by the network device; and then the first terminal may determine the time-frequency domain resources corresponding to different OCC sequence indices based on the configuration information. In some examples, the time-frequency domain resources may include the time domain resources and / or frequency domain resources of the DCI that schedules Msg2. The OCC sequence index may be determined by the transmission resources of the DCI that schedules Msg2. Users that use different OCC sequence indices for NPRACH transmission use the corresponding time domain resources and / or frequency domain resources when receiving DCI; accordingly, the network device configures different DCI reception resources for different OCC sequence indices, and uses the time-frequency domain resources associated with the corresponding OCC sequence index when transmitting DCI. For example, the network device may indicate the mapping relationship between different OCC sequence indices and the time-frequency domain resources of the DCI through configuration information, so that the first terminal can obtain the OCC sequence index corresponding to the time-frequency domain resources used to receive the DCI based on the mapping relationship.

[0151] In some examples, the time-frequency domain resources corresponding to different OCC sequence indices may be determined based on protocol agreement. In some examples, the time-frequency domain resources may include time domain resources and / or frequency domain resources for the DCI scheduling Msg2. The OCC sequence index may be determined by the transmission resource of the DCI scheduling Msg2. The specific determination process may refer to the above description and will not be repeated here.

[0152] C2, DMRS of NPDSCH; for example, the first terminal can determine the OCC sequence index through the DMRS of NPDSCH.

[0153] D2, DMRS of NPDCCH; for example, the first terminal can determine the OCC sequence index through the DMRS of NPDCCH.

[0154] In some embodiments, with respect to the above-mentioned C2 and D2, determining the OCC sequence index based on DMRS may include: determining the OCC sequence index based on the time domain resources used by the first terminal to receive the DMRS, and / or based on the frequency domain resources used by the first terminal to receive the DMRS, and / or based on the sequence of the DMRS, and / or based on the port of the DMRS.

[0155] In some examples, the first terminal may determine the DMRS parameters corresponding to different OCC sequence indices based on the configuration information of the network device. The DMRS parameters may include the time domain resources of the DMRS, and / or the frequency domain resources of the DMRS, and / or the sequence of the DMRS, and / or the port of the DMRS. For example, the network device configures different DMRS reception resources for different OCC sequence indices, and uses the time-frequency domain resources associated with the corresponding OCC sequence index when transmitting the DMRS. For example, the network device may indicate the mapping relationship between different OCC sequence indices and the time-frequency domain resources of the DMRS through the configuration information, so that the first terminal can obtain the OCC sequence index corresponding to the time-frequency domain resource used to receive the DMRS based on the mapping relationship.

[0156] For another example, the network device configures different DMRS sequences for different OCC sequence indices; or configures different DMRS ports for different OCC sequence indices, where the different DMRS ports can be distinguished by at least one of the OCC sequence, time domain resources, and frequency domain resources. The first terminal can then determine the corresponding OCC sequence index based on these mapping relationships.

[0157] In some examples, DMRS parameters corresponding to different OCC sequence indices may be determined based on protocol agreement. The DMRS parameters may include DMRS time domain resources, and / or DMRS frequency domain resources, and / or DMRS sequences, and / or DMRS ports. The OCC sequence index may be determined by the DMRS parameters. The specific determination process can be referred to above and will not be further described.

[0158] E2, RAPID; for example, the first RAPID may be a RAPID different from the traditional RAPID, and the first RAPID may include OCC sequence information, such as an OCC sequence index may be included in the first RAPID, and the first terminal may determine the OCC sequence index according to the value of the first RAPID.

[0159] F2, RA-RNTI; for example, the first RA-RNTI may be a RA-RNTI different from the traditional RA-RNTI, and the first RA-RNTI may include OCC sequence information, such as the OCC sequence index may be included in the first RA-RNTI, and the first terminal may determine the OCC sequence index based on the value of the first RA-RNTI.

[0160] In some embodiments, the first terminal may jointly determine the OCC sequence index in C1 through at least two items of A2 to F2.

[0161] In some embodiments, the network device may jointly indicate the OCC sequence index to the first terminal through at least two items of A2 to F2.

[0162] In some examples, the OCC sequence index is indicated by combining the reserved bits in the RA-RNTI and the MAC RAR. For example, if a total of 16 OCC sequence indices are included, the RA-RNTI carries a portion of the OCC sequence index (e.g., one of indexes 0 to 7), and the reserved bits in the MAC RAR carry another portion of the OCC sequence index (e.g., one of indexes 8 to 15). Alternatively, the RA-RNTI carries the indication bits of the partial OCC sequence index, and the reserved bits in the MAC RAR carry additional OCC sequence index indication bits. The complete OCC sequence index is obtained by combining the two portions of the indication bits.

[0163] In some examples, the OCC sequence index is indicated by combining the reserved bits in the DCI and MAC RAR of the scheduling Msg2. For example, if a total of 16 OCC sequence indices are included, the indication field of the DCI carries a portion of the OCC sequence index (e.g., one of indexes 0 to 7), and the reserved bits in the MAC RAR carry another portion of the OCC sequence index (e.g., one of indexes 8 to 15). Alternatively, the indication field of the DCI carries the indication bits of a portion of the OCC sequence index, and the reserved bits in the MAC RAR carry additional OCC sequence index indication bits. The complete OCC sequence index is obtained by combining the two portions of the indication bits.

[0164] In some examples, the OCC sequence index is indicated jointly by the DCI and RA-RNTI in the scheduling Msg2. For example, if a total of 16 OCC sequence indices are included, the DCI carries some of the OCC sequence indices (e.g., one of indices 0 to 7), and the RA-RNTI carries another portion of the OCC sequence indices (e.g., one of indices 8 to 15). Alternatively, the DCI carries some of the OCC sequence index indication bits, and the RA-RNTI carries additional OCC sequence index indication bits. The complete OCC sequence index is obtained by combining the two portions of indication bits.

[0165] In some examples, the OCC sequence index is indicated jointly by RAPID and MAC RAR. For example, if a total of 16 OCC sequence indices are included, RAPID carries a portion of the OCC sequence index (e.g., one of indexes 0 to 7), and the reserved bits in the MAC RAR carry another portion of the OCC sequence index (e.g., one of indexes 8 to 15). Alternatively, RAPID carries the indication bits of a portion of the OCC sequence index, and the reserved bits in the MAC RAR carry additional OCC sequence index indication bits. The complete OCC sequence index is obtained by combining the two portions of indication bits.

[0166] In some examples, the OCC sequence index is indicated jointly by RAPID and the DCI of the scheduling Msg2. For example, if a total of 16 OCC sequence indices are included, RAPID carries some of the OCC sequence indices (such as one of indexes 0 to 7), and DCI carries another portion of the OCC sequence indices (such as one of indexes 8 to 15). Alternatively, RAPID carries the indication bits of some of the OCC sequence indices, and DCI carries additional OCC sequence index indication bits. The complete OCC sequence index is obtained by combining the two portions of indication bits.

[0167] Based on the above examples, the OCC sequence index in C1 can be jointly determined by at least two items of A2 to F2. In addition to the above examples, there can be more joint determination methods based on the contents of at least two items of A2 to F2, which will not be repeated in this embodiment.

[0168] In some embodiments, the RAPID in A1 can be determined by the OCC sequence index. For example, if the RAPID is determined separately for OCC multiplexing, the RAPID can be determined based on the OCC sequence index.

[0169] In some embodiments, the RA-RNTI in the above B1 may be determined by an OCC sequence index.

[0170] In some examples, the RA-RNTI is determined separately for OCC multiplexing, or the calculation formula of the RA-RNTI includes OCC multiplexing related parameters, namely, the OCC sequence index. Specifically, a possible RA-RNTI calculation formula is shown in the following formulas 1 and 2:

[0171] For multi-carrier scheduling: RA-RNTI = 1 + floor(SFN_id / 4) + 256*carrier_id + 256*16*OCC sequence index (Formula 1)

[0172] Single carrier scheduling: RA-RNTI = 1 + floor(SFN_id / 4) + 256 * OCC sequence index (Formula 2)

[0173] The OCC sequence index can range from 0 to the maximum number of users allowed to multiplex NPRACH - 1. The floor() function performs a rounding operation in numerical calculations. SFN_id is the frame number of the system frame used by the first terminal to transmit the NPRACH, and carrier_id is the identifier of the subcarrier used to transmit the NPRACH.

[0174] In this embodiment, during the process of random access initiated by the NB-IoT terminal, for NPRACH multi-user OCC multiplexing, if multiple users reuse the same time-frequency domain resources through OCC, that is, the first terminal and at least one second terminal reuse the same NPRACH resources through OCC, the network device can use the first information to indicate the RAR corresponding to the first terminal, so that the network device sends a separate RAR to each user reused by the OCC. The first terminal can determine its corresponding RAR based on the first information, and then each user reused by the OCC can clearly know its corresponding RAR. This embodiment proposes a mechanism that supports multiple users to perform NPRACH OCC multi-user multiplexing on the same time-frequency resource block. While ensuring the channel transmission performance as much as possible, it supports more users to transmit data at the same time, thereby improving the capacity of the IoT-NTN system.

[0175] To illustrate the specific execution process of the first terminal, Figure 3 shows a flow chart of a communication method according to an embodiment of the present disclosure. When applied to the first terminal, the method may include the following steps.

[0176] Step S301: The first terminal determines first information.

[0177] In some embodiments, the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0178] For example, when a first terminal and at least one second terminal need to initiate a random access procedure, they transmit NPRACH using the same NPRACH resource multiplexed by the OCC, and then send Msg1 to the network device. After receiving Msg1, the network device returns Msg2 to the first terminal, and then sends the first information and multiple RARs to the first terminal. The first information indicates the RAR belonging to the first terminal among these RARs, so that the network device sends a separate RAR to the first terminal multiplexed by the OCC. The first terminal can determine the RAR belonging to itself among the sent RARs based on the first information.

[0179] In some embodiments, the first information includes at least one of the following:

[0180] RAPID; RA-RNTI; OCC sequence index.

[0181] In some examples, during the random access process, the first terminal sends a specific preamble sequence to the network device by sending Msg1. RAPID is used to identify the preamble sequence. The network device distinguishes different terminals by identifying different preamble sequences, and can then use RAPID to distinguish the RARs of different terminals. For example, when transmitting NPRACH, terminals that use different OCC sequences to reuse the same NPRACH resource are sent separate RARs to these terminals. In addition, in some embodiments, RAPID may include OCC sequence information, such as an OCC sequence index that may also be included in RAPID, so that the terminal can determine its own RAR based on the OCC sequence index in RAPID. In some examples, this RAPID can be distinguished from traditional RAPID.

[0182] In some examples, the RA-RNTI can be determined by the frame number of the system frame used by the first terminal to transmit the NPRACH. The network device can distinguish the RARs of different terminals based on different RA-RNTIs. For example, when transmitting NPRACH, the network device can send separate RARs to terminals that use different OCC sequences to multiplex the same NPRACH resources. In addition, in some embodiments, the RA-RNTI can include OCC sequence information. For example, the OCC sequence index can also be included in the RA-RNTI. The terminal can then determine its own RAR based on the OCC sequence index in the RA-RNTI. In some examples, this RA-RNTI can be distinguished from the traditional RA-RNTI.

[0183] In some examples, for sending NPRACH, the first terminal and at least one second terminal reuse the same time-frequency domain resources by using different OCC sequences. The OCC sequence index can be used to identify the OCC sequence. The network device distinguishes the RARs of different terminals through different OCC sequence index indications. For example, when sending NPRACH, a terminal that uses different OCC sequences to reuse the same NPRACH resources can determine its own RAR based on the OCC sequence index.

[0184] In some examples, RAPID and OCC sequence index are combined to identify the corresponding terminal; or RA-RNTI and OCC sequence index are combined to identify the corresponding terminal; or RAPID and RA-RNTI are combined to identify the RAR of the corresponding terminal, and the RAPID may be a RAPID different from the traditional RAPID (such as including the OCC sequence index), and / or the RA-RNTI may be a RA-RNTI different from the traditional RA-RNTI (such as including the OCC sequence index); or RAPID, RA-RNTI and OCC sequence index are combined to identify the corresponding terminal, etc.

[0185] In some embodiments, after determining the first information, the network device further indicates the first information to the first terminal based on certain signaling / methods, such as reserved bits in a MAC RAR. The first terminal determines which RAR belongs to itself based on the first information and the time-frequency domain resources and OCC sequence used by itself to transmit the NPRACH. There is a one-to-one mapping relationship between the first information and the OCC sequence.

[0186] In some embodiments, the RAPID may include OCC sequence information. For example, the first RAPID may be a RAPID different from a traditional RAPID, and the first RAPID may include OCC sequence information, such as an OCC sequence index included in the first RAPID, and the first terminal may determine the OCC sequence index based on the value of the first RAPID.

[0187] In some embodiments, the RA-RNTI may include OCC sequence information. For example, the first RA-RNTI may be a RA-RNTI different from a traditional RA-RNTI, and the first RA-RNTI may include OCC sequence information. For example, an OCC sequence index may be included in the first RA-RNTI, and the first terminal may determine the OCC sequence index based on the value of the first RA-RNTI.

[0188] In some embodiments, the OCC sequence index is determined by at least one of:

[0189] Reserved bits in MAC RAR; DCI for scheduling Msg2; DMRS for NPDSCH; DMRS for NPDCCH; RAPID; RA-RNTI.

[0190] In some embodiments, the first terminal may jointly determine the OCC sequence index through at least the above two items. The first terminal may accurately determine the OCC sequence index through the reserved bits in the MAC RAR, and / or the DCI of the scheduling Msg2, and / or the DMRS of the NPDSCH, and / or the DMRS of the NPDCCH, and / or the RAPID, and / or the RA-RNTI, and then determine the RAR corresponding to the first terminal based on the OCC sequence index.

[0191] In some embodiments, determining the OCC sequence index according to the reserved bits includes: determining the OCC sequence index according to a code point carried by the reserved bits; or determining the OCC sequence index according to a bitmap carried by the reserved bits.

[0192] In some embodiments, determining the OCC sequence index according to the DCI includes at least one of the following:

[0193] The OCC sequence index is determined according to the indication field in the DCI; the OCC sequence index is determined according to the time domain resources used to receive the DCI; and the OCC sequence index is determined according to the frequency domain resources used to receive the DCI.

[0194] In some embodiments, determining the OCC sequence index according to an indication field in the DCI includes: determining the OCC sequence index according to a code point corresponding to an OCC sequence index indication in the indication field.

[0195] In some embodiments, determining the OCC sequence index according to the DMRS includes at least one of the following:

[0196] The OCC sequence index is determined according to the time domain resources used by the received DMRS; the OCC sequence index is determined according to the frequency domain resources used by the received DMRS; the OCC sequence index is determined according to the sequence of the DMRS; and the OCC sequence index is determined according to the port of the DMRS.

[0197] In some embodiments, the first terminal receives configuration information sent by the network device; and determines, based on the configuration information, second information corresponding to different OCC sequence indexes.

[0198] In some embodiments, the second information includes at least one of the following:

[0199] First time-frequency domain resources, the first time-frequency domain resources include the time domain resources and / or frequency domain resources of the DCI; second time-frequency domain resources, the second time-frequency domain resources include the time domain resources and / or frequency domain resources of the DMRS; the sequence of the DMRS; the port of the DMRS.

[0200] Step S302: The first terminal determines its corresponding RAR according to the first information.

[0201] For the description of the specific examples in this embodiment, please refer to the corresponding description of the embodiments in Figures 1 and 2, and will not be repeated here.

[0202] In this embodiment, during the process of random access initiated by an NB-IoT terminal, for NPRACH multi-user OCC multiplexing, if multiple users reuse the same time-frequency domain resources through OCC, that is, a first terminal and at least one second terminal reuse the same NPRACH resources through OCC, the network device can use first information to indicate the RAR corresponding to the first terminal, so that the network device sends a separate RAR to each user reused by the OCC. The first terminal can determine its corresponding RAR based on the first information, and each user reused by the OCC can therefore clearly identify its corresponding RAR.

[0203] Figure 4 shows a flow chart of a communication method according to an embodiment of the present disclosure. As shown in Figure 4, the method is applied to be executed on the network device side and may include the following steps.

[0204] Step S401: A network device sends first information to a first terminal.

[0205] In some embodiments, the first information is used to indicate the RAR corresponding to the first terminal.

[0206] In some embodiments, the first terminal and at least one second terminal multiplex the same NPRACH resource through OCC.

[0207] For example, when a first terminal and at least one second terminal need to initiate a random access procedure, they transmit NPRACH using the same NPRACH resource multiplexed by the OCC, and then send Msg1 to the network device. After receiving Msg1, the network device returns Msg2 to the first terminal, and then sends the first information and multiple RARs to the first terminal. The first information indicates the RAR belonging to the first terminal among these RARs, so that the network device sends a separate RAR to the first terminal multiplexed by the OCC. The first terminal can determine the RAR belonging to itself among the sent RARs based on the first information.

[0208] In some embodiments, the first information includes at least one of the following:

[0209] RAPID; RA-RNTI; OCC sequence index.

[0210] In some examples, during the random access process, the first terminal sends a specific preamble sequence to the network device by sending Msg1. RAPID is used to identify the preamble sequence. The network device distinguishes different terminals by identifying different preamble sequences, and can then use RAPID to distinguish the RARs of different terminals. For example, when transmitting NPRACH, terminals that use different OCC sequences to reuse the same NPRACH resource are sent separate RARs to these terminals. In addition, in some embodiments, RAPID may include OCC sequence information, such as an OCC sequence index that may also be included in RAPID, so that the terminal can determine its own RAR based on the OCC sequence index in RAPID. In some examples, this RAPID can be distinguished from traditional RAPID.

[0211] In some examples, the RA-RNTI can be determined by the frame number of the system frame used by the first terminal to transmit the NPRACH. The network device can distinguish the RARs of different terminals based on different RA-RNTIs. For example, when transmitting NPRACH, the network device can send separate RARs to terminals that use different OCC sequences to multiplex the same NPRACH resources. In addition, in some embodiments, the RA-RNTI can include OCC sequence information. For example, the OCC sequence index can also be included in the RA-RNTI. The terminal can then determine its own RAR based on the OCC sequence index in the RA-RNTI. In some examples, this RA-RNTI can be distinguished from the traditional RA-RNTI.

[0212] In some examples, for sending NPRACH, the first terminal and at least one second terminal reuse the same time-frequency domain resources by using different OCC sequences. The OCC sequence index can be used to identify the OCC sequence. The network device distinguishes the RARs of different terminals through different OCC sequence index indications. For example, when sending NPRACH, a terminal that uses different OCC sequences to reuse the same NPRACH resources can determine its own RAR based on the OCC sequence index.

[0213] In some examples, RAPID and OCC sequence index are combined to identify the corresponding terminal; or RA-RNTI and OCC sequence index are combined to identify the corresponding terminal; or RAPID and RA-RNTI are combined to identify the RAR of the corresponding terminal, and the RAPID may be a RAPID different from the traditional RAPID (such as including the OCC sequence index), and / or the RA-RNTI may be a RA-RNTI different from the traditional RA-RNTI (such as including the OCC sequence index); or RAPID, RA-RNTI and OCC sequence index are combined to identify the corresponding terminal, etc.

[0214] In some embodiments, after determining the first information, the network device further indicates the first information to the first terminal based on certain signaling / methods, such as reserved bits in a MAC RAR. The first terminal determines which RAR belongs to itself based on the first information and the time-frequency domain resources and OCC sequence used by itself to transmit the NPRACH. There is a one-to-one mapping relationship between the first information and the OCC sequence.

[0215] In some embodiments, the OCC sequence index is determined by at least one of:

[0216] Reserved bits in MAC RAR; DCI for scheduling Msg2; DMRS for NPDSCH; DMRS for NPDCCH; RAPID; RA-RNTI.

[0217] In some embodiments, the network device may jointly indicate the OCC sequence index using at least the two items above. Furthermore, the first terminal may accurately determine the OCC sequence index using the reserved bits in the MAC RAR, and / or the DCI of the scheduling Msg2, and / or the DMRS of the NPDSCH, and / or the DMRS of the NPDCCH, and / or the RAPID, and / or the RA-RNTI, and may then determine the RAR corresponding to the first terminal based on the OCC sequence index.

[0218] In some embodiments, the code point carried by the reserved bits is used to determine the OCC sequence index; or, the bitmap carried by the reserved bits is used to determine the OCC sequence index.

[0219] In some embodiments, the indication field in the DCI is used to determine the OCC sequence index; and / or, the time domain resources of the DCI are used to determine the OCC sequence index; and / or, the frequency domain resources of the DCI are used to determine the OCC sequence index.

[0220] In some embodiments, the OCC sequence index in the indication field indicates a corresponding code point, which is used to determine the OCC sequence index.

[0221] In some embodiments, the time domain resources of the DMRS are used to determine the OCC sequence index; and / or, the frequency domain resources of the DMRS are used to determine the OCC sequence index; and / or, the sequence of the DMRS is used to determine the OCC sequence index; and / or, the port of the DMRS is used to determine the OCC sequence index.

[0222] In some embodiments, configuration information is sent to the first terminal, where the configuration information is used to indicate second information corresponding to different OCC sequence indexes.

[0223] In some embodiments, the second information includes at least one of the following:

[0224] First time-frequency domain resources, the first time-frequency domain resources include the time domain resources and / or frequency domain resources of the DCI; second time-frequency domain resources, the second time-frequency domain resources include the time domain resources and / or frequency domain resources of the DMRS; the sequence of the DMRS; the port of the DMRS.

[0225] In some embodiments, the RAPID includes OCC sequence information. For example, the first RAPID may be a RAPID different from a conventional RAPID, and the first RAPID may include OCC sequence information, such as an OCC sequence index included in the first RAPID, and the first terminal may determine the OCC sequence index based on the value of the first RAPID.

[0226] In some embodiments, the RA-RNTI includes OCC sequence information. For example, the first RA-RNTI may be a RA-RNTI different from a traditional RA-RNTI, and the first RA-RNTI may include OCC sequence information. For example, an OCC sequence index may be included in the first RA-RNTI, and the first terminal may determine the OCC sequence index based on the value of the first RA-RNTI.

[0227] For the description of the specific examples in this embodiment, please refer to the corresponding description of the embodiments in Figures 1 to 3, and will not be repeated here.

[0228] In this embodiment, during the process of random access initiated by an NB-IoT terminal, for NPRACH multi-user OCC multiplexing, if multiple users reuse the same time-frequency domain resources through OCC, that is, a first terminal and at least one second terminal reuse the same NPRACH resources through OCC, the network device can use first information to indicate the RAR corresponding to the first terminal, so that the network device sends a separate RAR to each user reused by the OCC. The first terminal can determine its corresponding RAR based on the first information, and each user reused by the OCC can therefore clearly identify its corresponding RAR.

[0229] The embodiments of the present disclosure further 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, a core network function node, a core network device, etc.) in any of the above methods.

[0230] It should be understood that the division of the various units or modules in the above device 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 device, 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.

[0231] In the embodiments of the present disclosure, a 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 relationships of hardware circuits. The logical relationships of the above-mentioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented by 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 file 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 ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0232] Figure 5 is a schematic diagram of the structure of a first terminal according to an embodiment of the present disclosure. As shown in Figure 5, the first terminal may include at least one of a processing module 51 and the like. In some embodiments, processing module 51 is configured to execute at least one of the communication steps (e.g., steps S301 to S302, but not limited thereto) performed by the first terminal in any of the above methods, and will not be further described here.

[0233] Figure 6 is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure. As shown in Figure 6, the network device may include a transceiver module 61. In some embodiments, transceiver module 61 is configured to perform at least one of the communication steps (e.g., steps S401 to S402, but not limited thereto) performed by the first terminal in any of the above methods, and will not be further described here.

[0234] In some embodiments, the transceiver module 61 may include a transmitting module and / or a receiving module, and the transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module 61 may be interchangeable with a transceiver.

[0235] In some embodiments, the processing module 51 can be a single module or include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module 51. Optionally, the processing module 51 can be interchangeable with the processor.

[0236] Figure 7 is a schematic diagram of the structure of a communication device 8100 proposed in an embodiment of the present disclosure. Communication device 8100 can be a network device (e.g., an access network device, a core network device, etc.), a first terminal (e.g., a user device, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 8100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0237] As shown in Figure 7, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. Optionally, the communication device 8100 is used to perform any of the above methods. Optionally, one or more processors 8101 are used to call instructions to enable the communication device 8100 to perform any of the above methods.

[0238] In some embodiments, the communication device 8100 further includes one or more transceivers 8102. When the communication device 8100 includes one or more transceivers 8102, the transceiver 8102 performs the communication steps of transmitting and / or receiving in the above method, and the processor 8101 performs at least one of the other steps. In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface 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.

[0239] In some embodiments, the communication device 8100 further includes one or more memories 8103 for storing data. Alternatively, all or part of the memories 8103 may be located outside the communication device 8100. In alternative embodiments, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuits 8104 are connected to the memory 8102 and may be configured to receive data from the memory 8102 or other devices, or to send data to the memory 8102 or other devices. For example, the interface circuits 8104 may read data stored in the memory 8102 and send the data to the processor 8101.

[0240] 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. 7 . 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.

[0241] FIG8 is a schematic diagram of the structure of a chip 8200 according to an embodiment of the present disclosure. If the communication device 8100 can be a chip or a chip system, reference can be made to the schematic diagram of the structure of the chip 8200 shown in FIG8 , but the present disclosure is not limited thereto.

[0242] The chip 8200 includes one or more processors 8201. The chip 8200 is configured to execute any of the above methods.

[0243] In some embodiments, chip 8200 further includes one or more interface circuits 8202. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 8200 further includes one or more memories 8203 for storing data. Alternatively, all or part of memory 8203 may be located external to chip 8200. Optionally, interface circuit 8202 is connected to memory 8203 and may be used to receive data from memory 8203 or other devices, or may be used to send data to memory 8203 or other devices. For example, interface circuit 8202 may read data stored in memory 8203 and send the data to processor 8201.

[0244] In some embodiments, the interface circuit 8202 performs at least one of the communication steps, such as sending and / or receiving, in the above-described method. For example, the interface circuit 8202 performing the communication steps, such as sending and / or receiving, in the above-described method means that the interface circuit 8202 performs data exchange between the processor 8201, the chip 8200, the memory 8203, or the transceiver device. In some embodiments, the processor 8201 performs at least one of the steps in the above-described communication method.

[0245] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0246] The present disclosure also proposes 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 is not limited thereto, and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto, and may also be a temporary storage medium.

[0247] 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 methods. Optionally, the program product is a computer program product.

[0248] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A communication method, characterized in that: The method is performed by a first terminal, where the first terminal and at least one second terminal multiplex the same narrowband physical random access channel NPRACH resource through an orthogonal cover code OCC, and the method includes: determining first information; A random access response RAR corresponding to the first terminal is determined according to the first information.

2. The method according to claim 1, characterized in that The first information includes at least one of the following: Random access preamble identifier RAPID; Random access radio network temporary identifier RA-RNTI; OCC sequence index.

3. The method according to claim 2, characterized in that The OCC sequence index is determined by at least one of the following: Reserved bits in the Media Access Control (MAC) RAR; Schedule downlink control information DCI of Msg2; Demodulation reference signal DMRS of narrowband physical downlink shared channel NPDSCH; DMRS of the narrowband physical downlink control channel NPDCCH; RAPID; RA-RNTI.

4. The method according to claim 3, characterized in that Determining the OCC sequence index according to the reserved bits includes: Determine the OCC sequence index according to the code point carried by the reserved bit; or, The OCC sequence index is determined according to the bitmap carried by the reserved bits.

5. The method according to any one of claims 3 to 4, characterized in that Determining the OCC sequence index according to the DCI includes at least one of the following: Determining the OCC sequence index according to the indication field in the DCI; Determining the OCC sequence index according to a time domain resource used to receive the DCI; The OCC sequence index is determined according to a frequency domain resource used to receive the DCI.

6. The method according to claim 5, characterized in that Determining the OCC sequence index according to an indication field in the DCI includes: The OCC sequence index is determined according to a code point corresponding to the OCC sequence index in the indication field.

7. The method according to any one of claims 3 to 6, characterized in that Determining the OCC sequence index according to the DMRS includes at least one of the following: Determining the OCC sequence index according to a time domain resource used for receiving the DMRS; Determining the OCC sequence index according to a frequency domain resource used for receiving the DMRS; Determining the OCC sequence index according to the DMRS sequence; The OCC sequence index is determined according to the port of the DMRS.

8. The method according to any one of claims 3 to 7, characterized in that The method further comprises: Receive configuration information sent by network devices; According to the configuration information, second information corresponding to different OCC sequence indexes is determined.

9. The method according to claim 8, characterized in that The second information includes at least one of the following: First time-frequency domain resources, where the first time-frequency domain resources include time domain resources and / or frequency domain resources of the DCI; second time-frequency domain resources, where the second time-frequency domain resources include time domain resources and / or frequency domain resources of the DMRS; a sequence of the DMRS; The port of the DMRS.

10. The method according to claim 2, characterized in that The RAPID contains OCC sequence information.

11. The method according to claim 2, characterized in that The RA-RNTI includes OCC sequence information.

12. A communication method, characterized in that: Executed by a network device, the method includes: Sending first information to the first terminal; The first information is used to indicate a random access response RAR corresponding to the first terminal, and the first terminal and at least one second terminal multiplex the same narrowband physical random access channel NPRACH resource through an orthogonal cover code OCC.

13. The method according to claim 12, characterized in that The first information includes at least one of the following: Random access preamble identifier RAPID; Random access radio network temporary identifier RA-RNTI; OCC sequence index.

14. The method according to claim 13, characterized in that The OCC sequence index is determined by at least one of the following: Reserved bits in the Media Access Control (MAC) RAR; Schedule downlink control information DCI of Msg2; Demodulation reference signal DMRS of narrowband physical downlink shared channel NPDSCH; DMRS of the narrowband physical downlink control channel NPDCCH; RAPID; RA-RNTI.

15. The method according to claim 14, characterized in that The code point carried by the reserved bit is used to determine the OCC sequence index; or, The bitmap carried by the reserved bits is used to determine the OCC sequence index.

16. The method according to any one of claims 14 to 15, characterized in that The indication field in the DCI is used to determine the OCC sequence index; and / or, The time domain resource of the DCI is used to determine the OCC sequence index; and / or, The frequency domain resource of the DCI is used to determine the OCC sequence index.

17. The method according to claim 16, characterized in that The OCC sequence index in the indication field indicates a corresponding code point, which is used to determine the OCC sequence index.

18. The method according to any one of claims 14 to 17, characterized in that The time domain resource of the DMRS is used to determine the OCC sequence index; and / or, The frequency domain resources of the DMRS are used to determine the OCC sequence index; and / or, The DMRS sequence is used to determine the OCC sequence index; and / or, The port of the DMRS is used to determine the OCC sequence index.

19. The method according to any one of claims 14 to 18, characterized in that The method further comprises: Configuration information is sent to the first terminal, where the configuration information is used to indicate second information corresponding to different OCC sequence indexes.

20. The method according to claim 19, characterized in that The second information includes at least one of the following: First time-frequency domain resources, where the first time-frequency domain resources include time domain resources and / or frequency domain resources of the DCI; second time-frequency domain resources, where the second time-frequency domain resources include time domain resources and / or frequency domain resources of the DMRS; a sequence of the DMRS; The port of the DMRS.

21. The method according to claim 13, wherein The RAPID contains OCC sequence information.

22. The method according to claim 13, wherein The RA-RNTI includes OCC sequence information.

23. A communication method, characterized in that: include: The network device sends first information to the first terminal; The first terminal determines, according to the first information, a random access response RAR corresponding to the first terminal; The first terminal and at least one second terminal multiplex the same narrowband physical random access channel NPRACH resource through an orthogonal cover code OCC.

24. A first terminal, characterized in that: include: a processing module configured to determine first information; A random access response RAR corresponding to the first terminal is determined according to the first information, wherein the first terminal and at least one second terminal multiplex the same narrowband physical random access channel NPRACH resource through an orthogonal cover code OCC.

25. A network device, characterized in that: include: A transceiver module is configured to send first information to a first terminal; wherein the first information is used to indicate a random access response RAR corresponding to the first terminal, and the first terminal and at least one second terminal multiplex the same narrowband physical random access channel NPRACH resource through an orthogonal cover code OCC.

26. A communication device, characterized in that: include: one or more processors; The processor is configured to execute the method according to any one of claims 1 to 22.

27. A communication system, characterized in that: The method comprises a first terminal and a network device, wherein the first terminal is configured to implement the method according to any one of claims 1 to 11, and the network device is configured to implement the method according to any one of claims 12 to 22.

28. A computer storage medium, wherein: The computer storage medium stores computer-executable instructions; after the computer-executable instructions are executed by the processor, the method according to any one of claims 1 to 22 can be implemented.

29. A computer program product, comprising a computer program, wherein after being executed by a processor, the computer program can implement the method according to any one of claims 1 to 22.

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