Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus, for use in allowing access network devices to maintain code division multiplexing groups, so as to allocate reasonable reference signal ports to terminal devices accessing the access network devices, thereby reducing interference between the access network devices or between the terminal devices as much as possible. The method comprises: receiving first information from a first access network device, wherein the first information is used for indicating at least one first code division multiplexing group; on the basis of the first information, determining at least one second code division multiplexing group used by a cell served by a second access network device, wherein a code division multiplexing group among the at least one second code division multiplexing group is entirely or partially different from a code division multiplexing group among the at least one first code division multiplexing group, and the at least one second code division multiplexing group corresponds to at least one reference signal port; and sending second information to a terminal device, wherein the second information is used for indicating all or some of ports among the at least one reference signal port.

Description

Communication method and communication apparatus

[0001] The present application claims priority from the Chinese patent application No. 202411054858.6 filed on August 01, 2024, and entitled "Communication method and communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and in particular to a communication method and a communication apparatus. BACKGROUND

[0003] Reference signals (RS) are widely used in wireless communication systems, for example, for channel estimation, signal demodulation, synchronization, etc. The reference signals may, for example, include cell-specific reference signals (CRS), demodulation reference signals (DMRS), sounding reference signals (SRS), channel state information-reference signals (CSI-RS), etc.

[0004] Taking DMRS as an example, different DMRS ports can be divided into different code division multiplexing groups (CDM groups), and different DMRS ports in the same code division multiplexing group are expanded in the time-frequency domain using orthogonal cover codes (OCC) and can ensure orthogonality on different DMRS ports. An access network device in a wireless communication system allocates a DMRS port to a terminal device accessing the access network device, and the terminal device determines the index of a resource element (RE) in each resource block (RB) in a frequency domain resource according to the DMRS port when mapping a DMRS resource.

[0005] Therefore, how to allocate a reasonable reference signal port to a terminal device has become a technical problem to be solved by the present application. SUMMARY

[0006] The application provides a communication method and a communication device, which can enable an access network device to maintain code division multiplexing groups, so that a terminal device accessing the access network device can be allocated with reasonable reference signal ports, interference between access network devices or between terminal devices can be reduced as much as possible, the accuracy of channel estimation can be improved, and the performance of demodulation according to the reference signal can be improved.

[0007] In a first aspect, the application provides a communication method. The method can be executed by any access network device or a module or unit (for example, a chip or a circuit) in the access network device (which is referred to as a second access network device herein). The method comprises: receiving first information from a first access network device, the first information being used to indicate at least one first code division multiplexing group; determining, according to the first information, at least one second code division multiplexing group used by a cell served by the second access network device, the at least one second code division multiplexing group being all or partially different from code division multiplexing groups in the at least one first code division multiplexing group, and the at least one second code division multiplexing group corresponding to at least one reference signal port; and sending second information to a terminal device, the second information being used to indicate all or part of the at least one reference signal port.

[0008] Optionally, the at least one first code division multiplexing group can comprise code division multiplexing groups maintained by the first access network device, and / or code division multiplexing groups maintained by a third access network device. The third access network device is any one or more access network devices distinguished from the first and second access network devices. The third access network device indicates, to the first access network device, code division multiplexing groups maintained by the third access network device, and the first access network device determines code division multiplexing groups used by a cell served by the third access network device.

[0009] It should be understood that the code division multiplexing groups used by the cell served by the access network device can be understood as the code division multiplexing groups maintained by the access network device.

[0010] In the communication method of the present application, the first information indicating at least one first code division multiplexing group is sent by the first access network device to the second access network device, so that the second access network device can determine at least one second code division multiplexing group maintained by itself according to the at least one first code division multiplexing group. The second access network device can make the code division multiplexing groups in the at least one second code division multiplexing group as different as possible from the code division multiplexing groups in the at least one first code division multiplexing group. Therefore, the second access network device can determine and maintain reasonable code division multiplexing groups (i.e. at least one second code division multiplexing group), so as to interfere with the first access network device as little as possible, and the second access network device can also indicate reasonable reference signal ports to the terminal device accessing the second access network device according to the maintained reasonable code division multiplexing groups, so that the terminal device accessing the second access network device can transmit reference signals using reasonable resources according to the reference signal ports, so as to interfere with the terminal device accessing the first access network device as little as possible, thereby improving the accuracy of channel estimation, and further improving the performance of demodulation according to the reference signals, and enhancing the communication reliability.

[0011] In combination with the first aspect, in a possible implementation manner, the first information carries indexes of the at least one first code division multiplexing group. In this way, after receiving the first information, the second access network device can obtain the at least one first code division multiplexing group through the indexes carried by the first information, thereby reducing the signaling overhead.

[0012] In combination with the first aspect, in a possible implementation manner, the first information carries indication information, and the indication information is used to indicate that the at least one first code division multiplexing group is predefined. In this way, after receiving the first information, the second access network device can obtain the at least one first code division multiplexing group through the indication information carried by the first information, and the indication information can be a value or an indicator, thereby further reducing the signaling overhead.

[0013] In combination with the first aspect, in a possible implementation manner, the cell served by the second access network device includes a first cell and a second cell, the first cell uses a third code division multiplexing group in the at least one second code division multiplexing group, and the second cell uses a fourth code division multiplexing group in the at least one second code division multiplexing group, and the third code division multiplexing group is different from the fourth code division multiplexing group.

[0014] In the communication method, when the second access network device indicates a reference signal port for a terminal device accessing the second access network device, if the number of cells served by the second access network device is multiple, the second access network device can configure different reasonable code division multiplexing groups for different cells, so that no interference is generated between different cells, and the reference signal port is allocated to the terminal device accessing different cells according to the configured reasonable code division multiplexing group, so that the terminal device accessing different cells can transmit a reference signal by using reasonable resources according to the reference signal port, and further, no interference is generated between the terminal devices accessing different cells, the accuracy of channel estimation is further improved, the performance of demodulation according to the reference signal is further improved, and the reliability of communication is further enhanced.

[0015] In combination with the first aspect, in a possible implementation manner, the method further includes: sending third information to the first access network device, the third information being used to indicate the at least one second code division multiplexing group.

[0016] In the communication method, after the second access network device determines the at least one second code division multiplexing group, the first access network device is informed of the at least one second code division multiplexing group maintained by the second access network device, so that the first access network device can also avoid the at least one second code division multiplexing group, so as to avoid interference as much as possible between the first access network device and the second access network device, and the first access network device allocates a reasonable reference signal port to a terminal device accessing the first access network device, so that the terminal device accessing the first access network device can transmit a reference signal by using reasonable resources according to the allocated reference signal port, so as to avoid interference as much as possible between the terminal device accessing the first access network device and the terminal device accessing the second access network device, thereby improving the accuracy of channel estimation, further improving the performance of demodulation according to the reference signal, and enhancing the reliability of communication.

[0017] In the second aspect, the application provides another communication method. The method can be executed by a core network device or a module or unit (for example, a chip or a circuit) in the core network device, and includes: determining at least one first code division multiplexing group used by a cell served by a first access network device and / or at least one second code division multiplexing group used by a cell served by a second access network device, the at least one second code division multiplexing group and the code division multiplexing groups in the at least one first code division multiplexing group being all or partially different; sending first information to the first access network device and / or sending second information to the second access network device, the first information being used to indicate the at least one first code division multiplexing group, and the second information being used to indicate the at least one second code division multiplexing group.

[0018] In the communication method of the present application, the core network device allocates different code division multiplexing groups for different access network devices as much as possible, so that at least one first code division multiplexing group used by a cell served by the first access network device is as different as possible from at least one second code division multiplexing group used by a cell served by the second access network device. In this way, the first access network device can be indicated a reasonable code division multiplexing group (i.e. at least one first code division multiplexing group), the second access network device can be indicated a reasonable code division multiplexing group (i.e. at least one second code division multiplexing group), or the first access network device and the second access network device can be respectively indicated a reasonable code division multiplexing group, so as to make the access network devices interfere with each other as little as possible. The first access network device can also indicate a reasonable reference signal port to a terminal device accessing the first access network device according to the indicated reasonable code division multiplexing group. In this way, the terminal device accessing the first access network device can transmit a reference signal using a reasonable resource according to the reference signal port, so as to make the terminal device accessing the first access network device and the terminal device accessing the second access network device interfere with each other as little as possible, thereby improving the accuracy of channel estimation, and further improving the performance of demodulation according to the reference signal, enhancing communication reliability.

[0019] Likewise, the second access network device can also indicate a reasonable reference signal port to a terminal device accessing the second access network device according to the indicated reasonable code division multiplexing group. In this way, the terminal device accessing the second access network device can transmit a reference signal using a reasonable resource according to the reference signal port, so as to make the terminal device accessing the second access network device and the terminal device accessing the first access network device interfere with each other as little as possible, to achieve the same technical effects as described above.

[0020] With reference to the second aspect, in a possible implementation manner, the method further includes: receiving third information from the first access network device, and / or receiving fourth information from the second access network device, the third information being used for indicating at least one third code division multiplexing group, the at least one third code division multiplexing group being a candidate code division multiplexing group used by a cell served by the first access network device, the fourth information being used for indicating at least one fourth code division multiplexing group, the at least one fourth code division multiplexing group being a candidate code division multiplexing group used by a cell served by the second access network device; and the determining the at least one first code division multiplexing group used by the cell served by the first access network device and / or the at least one second code division multiplexing group used by the cell served by the second access network device includes: determining the at least one first code division multiplexing group and / or the at least one second code division multiplexing group according to the third information and the fourth information, code division multiplexing groups in the at least one first code division multiplexing group and the at least one third code division multiplexing group being all or partially same, code division multiplexing groups in the at least one second code division multiplexing group and the at least one fourth code division multiplexing group being all or partially same.

[0021] In the communication method, the core network device can determine the at least one first code division multiplexing group and / or the at least one second code division multiplexing group by comprehensively considering the at least one third code division multiplexing group and / or the at least one fourth code division multiplexing group, so that the determined at least one first code division multiplexing group and / or at least one second code division multiplexing group is more in line with the actual situation of the first access network device and / or the second access network device, further improves the accuracy of channel estimation, improves the performance of demodulation according to the reference signal, and enhances the reliability of communication.

[0022] With reference to the second aspect, in a possible implementation manner, the third information carries an index of the at least one third code division multiplexing group, and / or the fourth information carries an index of the at least one fourth code division multiplexing group.

[0023] With reference to the second aspect, in a possible implementation manner, the third information carries first indication information, the first indication information being used for indicating that the at least one third code division multiplexing group is predefined; and / or the fourth information carries second indication information, the second indication information being used for indicating that the at least one fourth code division multiplexing group is predefined.

[0024] In a third aspect, the present application provides another communication method. The method can be performed by a first access network device or a module or unit (e.g., a chip or a circuit) in the first access network device, and includes: receiving first information from a core network device, the first information being used to indicate at least one first code division multiplexing group, the at least one first code division multiplexing group being a code division multiplexing group used by a cell served by the access network device, the at least one first code division multiplexing group corresponding to at least one reference signal port; and sending fifth information to a terminal device, the fifth information being used to indicate all or part of the at least one reference signal port.

[0025] It should be understood that the access network device is a first access network device.

[0026] In a possible implementation of the third aspect, the cell served by the access network device includes a first cell and a second cell, the first cell uses a fifth code division multiplexing group in the at least one first code division multiplexing group, the second cell uses a sixth code division multiplexing group in the at least one first code division multiplexing group, and the fifth code division multiplexing group is different from the sixth code division multiplexing group.

[0027] In a possible implementation of the third aspect, the method further includes: sending, to the core network device, third information, the third information being used to indicate at least one third code division multiplexing group, the at least one third code division multiplexing group being a candidate code division multiplexing group used by the cell served by the access network device, and code division multiplexing groups in the at least one first code division multiplexing group and the at least one third code division multiplexing group being all or part the same.

[0028] In a fourth aspect, the present application provides a communication apparatus for performing the method in any possible implementation of any of the above aspects. Specifically, the communication apparatus includes units / modules for performing the method in any possible implementation of any of the above aspects.

[0029] In a fifth aspect, the present application provides another communication apparatus including a processor coupled with a memory, and configured to execute instructions in the memory to implement the method in any possible implementation of any of the above aspects. In an implementation of the present application, the communication apparatus further includes the memory. In an implementation of the present application, the communication apparatus further includes a communication interface, and the processor is coupled with the communication interface.

[0030] In an implementation, the communication apparatus is an access network device or a core network device. When the communication apparatus is an access network device, the communication interface can be a transceiver and / or an input / output interface. When the communication apparatus is a core network device, the communication interface can be an input / output interface.

[0031] In another implementation, the communication device is a chip configured in an access network device or a core network device. When the communication device is a chip configured in an access network device or a core network device, the communication interface can be an input / output interface.

[0032] In another implementation, the communication device is a circuit configured in an access network device or a core network device. When the communication device is a circuit configured in an access network device, the communication interface can be a transceiver. When the communication device is a circuit configured in a core network device, the communication interface can be an input / output interface.

[0033] In a sixth aspect, the present application provides a processor, comprising an input circuit, an output circuit and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation manner in any of the preceding aspects.

[0034] In the implementation, the processor can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a flip-flop, various logic circuits, etc. The input signal received by the input circuit can be received and input by a receiver, for example, but not limited to. The output signal output by the output circuit can be output to and transmitted by a transmitter, for example, but not limited to. The input circuit and the output circuit can be the same circuit, which is used as the input circuit and the output circuit at different times, respectively. The present application does not limit the specific implementation of the processor and various circuits.

[0035] In a seventh aspect, the present application provides a processing device, comprising a processor and a memory. The processor is configured to read instructions stored in the memory, and can receive a signal through a receiver and transmit a signal through a transmitter to execute the method in any possible implementation manner in any of the preceding aspects.

[0036] In an implementation, the processor is one or more, and the memory is one or more.

[0037] In an implementation, the memory can be integrated with the processor, or the memory and the processor can be separately arranged.

[0038] In the implementation, the memory can be a non-transitory memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be separately arranged on different chips. The present application does not limit the type of memory and the arrangement of the memory and the processor.

[0039] It should be understood that the relevant data interaction process, such as sending information, can be a process of outputting information from the processor, and receiving information can be a process of receiving information by the processor. Specifically, the data output by the processor can be output to the transmitter, and the input data received by the processor can come from the receiver. Wherein, the transmitter and the receiver can be collectively referred to as a transceiver.

[0040] The processing device in the seventh aspect described above can be a chip, and the processor can be implemented by hardware or software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, or the like. When implemented by software, the processor can be a general-purpose processor, which is implemented by reading software code stored in a memory. The memory can be integrated in the processor or located outside the processor and exist independently.

[0041] In an eighth aspect, a computer program product is provided, which includes a computer program (also referred to as code or instructions), which, when executed, causes a computer to perform the method in any possible implementation manner of any one of the aspects described above.

[0042] In a ninth aspect, a computer-readable storage medium is provided, which stores a computer program (also referred to as code or instructions), which, when executed on a computer, causes the computer to perform the method in any possible implementation manner of any one of the aspects described above.

[0043] In a tenth aspect, a communication system is provided, which includes the first access network device, the second access network device, and the terminal device described above.

[0044] Optionally, the communication system described above further includes a core network device. BRIEF DESCRIPTION OF DRAWINGS

[0045] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0046] FIG. 2 is a schematic diagram of an architecture of a baseband unit according to an embodiment of the present application;

[0047] FIG. 3 is a schematic diagram of a demodulation reference signal pattern according to an embodiment of the present application;

[0048] FIG. 4 is a schematic diagram of another demodulation reference signal pattern according to an embodiment of the present application;

[0049] FIG. 5 is an exemplary flowchart of a communication method according to an embodiment of the present application;

[0050] FIG. 6 is an exemplary flowchart of another communication method according to an embodiment of the present application;

[0051] FIG. 7 is an exemplary block diagram of a communication apparatus according to an embodiment of the present application;

[0052] FIG. 8 is an exemplary block diagram of another communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to understand the embodiments of the present application, the following points are explained first before the embodiments of the present application are introduced.

[0054] In the present application, the terms "first", "second", and the like are used to distinguish items of the same or similar function and role. Those skilled in the art can understand that the terms "first", "second", and the like do not limit the quantity and execution order, and the terms "first", "second", and the like do not necessarily mean different.

[0055] In the present application, "for indicating" or "indicating" can include direct indication and indirect indication, or "for indicating" or "indicating" can be explicit and / or implicit indication. For example, when describing that a certain information is for indicating information I, it can include that the information directly indicates I or indirectly indicates I, and it does not mean that I is necessarily carried in the information. For another example, implicit indication can be based on the location and / or resource for transmission; explicit indication can be based on one or more parameters, and / or one or more indexes, and / or one or more bit patterns it represents.

[0056] In the present application, "sending information to device A" or similar descriptions can be understood as that the destination of the information is device A, which can include directly or indirectly sending information to device A. "Receiving information from device B" or similar descriptions can be understood as that the source of the information is device B, which can include directly or indirectly receiving information from device B. The information can be processed as necessary between the source and the destination of the information transmission, but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly, and will not be repeated here.

[0057] It should be understood that in the present application, "predefined" can be implemented by pre-storing corresponding codes, tables or other means for indicating related information in a device, and the present application does not limit the specific implementation manner. Wherein, "storing" can mean storing in one or more memories. The type of memory can be any form of storage medium, and the present application does not limit this.

[0058] It should be noted that the terms "exemplary" and "for example" are used herein to mean "serving as an example, instance, or illustration," and not "preferred" or "advantageous over other examples." The usage of these terms in this application is not intended to convey any preference or advantage over other embodiments or designs.

[0059] In addition, "at least one" means one or more, "multiple" means two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, B exists alone, and A, B can be singular or plural. The character " / " generally represents that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b and c, can represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.

[0060] The technical solutions in the application will be described below with reference to the drawings.

[0061] The technical solutions of the embodiments of the present application can be applied to various communication systems. The communication system can be a 3rd generation partnership project (3GPP) related cellular system, for example: a global system for mobile communications (GSM) system, a code division multiple access (CDMA) system, a universal mobile telecommunications system (UMTS), a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD) system, a worldwide interoperability for microwave access (WiMAX) system, a 5th generation (5G) or new radio (NR) communication system, a future wireless communication system, and the like. The communication system can also be a wireless local area network (WLAN) system, an internet of things (IoT) system, a narrow band internet of things (NB-IoT) system, a public land mobile network (PLMN) system, a device-to-device (D2D) network system, a machine to machine (M2M) network system, or other network system.

[0062] The technical solutions of the embodiments of the present application can also be applied to a communication system in which two or more of the above systems are fused.

[0063] It should be understood that the above various communication systems are for illustration only, and the technical solutions of the embodiments of the present application can be applied to any communication system capable of transmitting a reference signal.

[0064] FIG. 1 is a schematic diagram of an architecture of a communication system 100 according to an embodiment of the present application. As shown in FIG. 1, in the communication system 100, a terminal device 120, a terminal device 130, a terminal device 140 or a terminal device 150 can transmit uplink signals to an access network device 110, or receive downlink signals from the access network device 110. The terminal devices can also transmit and receive sidelink signals to and from each other, for example, the terminal device 150 transmits sidelink signals to the terminal device 130 or receives sidelink signals from the terminal device 130. In addition, some terminal devices can also collect data, for example, the terminal device 120 can be a train detector to collect relevant data. The access network device 110 can exchange information with a core network device 160 in addition to the uplink and downlink signal exchange with the terminal device 120, the terminal device 130, the terminal device 140 or the terminal device 150.

[0065] It should be understood that FIG. 1 is only a schematic diagram, and other devices can also be included in the communication system 100. The number of access network devices, terminal devices and core network devices included in the communication system 100 is not limited in the embodiments of the present application.

[0066] The terminal device described above can also be referred to as a user equipment (UE), a mobile station (MS), a mobile terminal (MT), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile terminal, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or a user device, etc.

[0067] The terminal device can be a device that provides voice / data connectivity to a user, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminal devices are: mobile phone, tablet computer, notebook computer, palm computer, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), handheld device with wireless communication function, computing device or other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in a 5G network, or terminal device in a future evolved public land mobile network (PLMN), etc. The embodiments of the present application are not limited thereto.

[0068] By way of example and not limitation, in the embodiments of the present application, the terminal device can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. The wearable device is not only a hardware device, but also a device that realizes powerful functions through software support and data interaction and cloud interaction. The general wearable smart device includes devices with full functions, large size, and the ability to realize complete or partial functions without relying on a smart phone, such as smart watches or smart glasses, and devices that focus on a certain application function and need to be used in cooperation with other devices, such as smart phones, such as various smart wristbands and smart jewelry for monitoring vital signs.

[0069] In addition, in the embodiments of the present application, the terminal device can also be a terminal device in an IoT system. IoT is an important part of future information technology development, and its main technical feature is to connect objects through communication technology and network, so as to realize the intelligent network of man-machine interconnection and object-object interconnection. The terminal device of the present application can also be a vehicle-mounted module, a vehicle-mounted module group, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit built in as one or more components or units. The vehicle can implement the method of the present application through the built-in vehicle-mounted module, vehicle-mounted module group, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit. Therefore, the embodiments of the present application can be applied to the Internet of Vehicles, such as vehicle to everything (V2X), long term evolution-vehicle (LTE-V), vehicle-to-vehicle (V2V), etc.

[0070] In addition, in the embodiments of the present application, the terminal device can also be an electric vertical take-off and landing (eVTOL) in urban air mobility (UAM), a UE carried by a user on an eVTOL, an unmanned aerial vehicle, etc.

[0071] The access network device is a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network. The access network device includes, but is not limited to, a base station (BS), a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, a home evolutional Node B, or home Node B, HNB), a baseband unit (BBU), a wireless fidelity (Wi-Fi) access point (AP), a wireless relay node, a wireless backhaul node, a transmission and reception point (TRP; or, transmission point, TP). Among them, the base station is a device deployed in a wireless access network that can provide wireless communication functions, which can also be referred to as a base station device, for example, an evolutional Node B (eNB or e-NodeB) in the LTE system, a Node B (NB), a base station (gNodeB or gNB) in the 5G system, a base station in the future wireless communication system, etc. The base station can contain a BBU and a remote radio unit (RRU). The BBU and the RRU can be placed in different places, for example: RRU pull, placed in a high traffic area, BBU placed in the central machine room. The BBU and the RRU can also be placed in the same machine room. The BBU and the RRU can also be different components under one rack. The base station can be in the following forms: macro base station, micro base station (also known as small station), pico base station, relay station, access point, balloon station, etc.

[0072] In some deployments of the access network device, the access network device can include a central unit (CU) and / or a distributed unit (DU). Where the access network device includes a CU and a DU, for example, protocol layers of an eNB in an LTE system are split apart, with functions of part of the protocol layers being centrally controlled at the CU and the rest or all of the protocol layers being distributed in the DUs and centrally controlled by the CU. In some deployments of the access network device, the CU can also be divided into a CU-control plane (CP) and a CU-user plane (UP), etc. In yet some deployments of the access network device, the access network device can also be an open radio access network (ORAN) architecture, etc. The specific deployment manner of the access network device is not limited in the present application.

[0073] The access network device serves a cell, and a terminal device communicates with the cell through a transmission resource (for example, a frequency domain resource, or a spectrum resource) allocated by the access network device. The cell can belong to a macro base station (for example, a macro eNB or a macro gNB, etc.) or a base station corresponding to a small cell. The small cell can include a metro cell, a micro cell, a pico cell, a femto cell, etc., and these small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

[0074] The core network device described above can provide user connection, management of users, and completion of a bearer for a service, and provide an interface to an external network as a bearer network. For example, the core network device of a 5G NR system can include an access and mobility management function (AMF) entity, a user plane function (UPF) entity, a session management function (SMF) entity, etc.

[0075] The access network device and the terminal device described above can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water; and can also be deployed on aircraft, unmanned aerial vehicles, balloons, and satellites in the air. The embodiments of the present application do not limit the application scenarios of the wireless access network device and the terminal device.

[0076] In the embodiments of the present application, the terminal device, the access network device or the core network device comprises a hardware layer, an operating system layer running above the hardware layer, and an application layer running on the operating system layer. The hardware layer comprises hardware such as a central processing unit (CPU), a memory management unit (MMU) and a memory (also referred to as main memory). The operating system can be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system or a windows operating system. The application layer comprises applications such as a browser, an address book, word processing software and instant messaging software. Moreover, the embodiments of the present application do not particularly limit the specific structure of the execution subject of the method provided by the embodiments of the present application, as long as the execution subject can communicate according to the method provided by the embodiments of the present application by running a program in which the code of the method provided by the embodiments of the present application is recorded. For example, the execution subject of the method provided by the embodiments of the present application can be a terminal device, an access network device or a core network device, or a functional module capable of invoking and executing a program in a terminal device, an access network device or a core network device.

[0077] In the hardware layer, the access network device or the terminal device described above can further comprise a baseband unit to implement digital communication and signal processing, including encoding, decoding, rate matching, de-rate matching, scrambling, descrambling, modulation, demodulation, layer mapping, fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), discrete Fourier transform (DFT), inverse discrete Fourier transform (IDFT), precoding, resource element mapping, channel equalization, removing resource element mapping, digital beamforming, adding cyclic prefix (CP), removing CP, and the like.

[0078] Figure 2 is a schematic diagram of the architecture of the baseband unit 200 provided in an embodiment of this application. As shown in Figure 2, in the baseband unit 200, a bus 204 communicatively couples various circuits together, including one or more processors 201, one or more computer-readable storage media 202, and a memory 203. The bus 204 can also link various other circuits (not shown in the figure), such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further. The bus 204 connects the radio frequency unit and other interfaces through a bus interface 205. The bus 204 may include any number of interconnect buses and bridges, depending on the specific application and overall design constraints.

[0079] The radio frequency (RF) unit includes an antenna array and communicates with various other devices via a wireless transmission medium. Signals received from the RF unit can be transmitted to the processor 201 via the bus interface 205 and bus 204, where the processor 201 processes them; alternatively, the processor 201 can process the information and then transmit it to the RF unit via bus 204 and bus interface 205, from where it is transmitted as a signal.

[0080] Processor 201 can be a baseband processor or other suitable hardware configured to implement digital communication and signal processing. Processor 201 is responsible for managing bus 204 and general processing, including executing software stored on computer-readable storage medium 202. When processor 201 executes the software, it can perform the various digital communication and signal processing described above.

[0081] Below is a brief introduction to some of the concepts or terms used in this application.

[0082] 1. Demodulation reference signal (DMRS)

[0083] As a reference signal, DMRS can be used for channel estimation and signal demodulation of various physical channels, including physical broadcast channel (PBCH), physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), physical uplink control channel (PUCCH), and physical uplink shared channel (PUSCH).

[0084] The protocol defines two DMRS types: DMRS configuration type 1 and DMRS configuration type 2. It should be understood that the protocol can include LTE, 5G NR, and future communication standard protocols, etc., and is not limited thereto. Figure 3 is a schematic diagram of the DMRS pattern provided in an embodiment of this application. As shown in Figure 3, in configuration type 1, the smallest resource unit group in the frequency domain is a single resource unit; in configuration type 2, the smallest resource unit group in the frequency domain is two consecutive resource units. Configuration type 1 can support 4 DMRS ports with a single symbol and 8 DMRS ports with a double symbol. Configuration type 2 can support 6 DMRS ports with a single symbol and 12 DMRS ports with a double symbol.

[0085] Referring again to Figure 3, resource units represented by different filling methods can represent different code division multiplexing (CDM) groups. In configuration type 1, resource units can be divided into two CDM groups: CDM group 0 and CDM group 1. In configuration type 2, resource units can be divided into three CDM groups: CDM group 0, CDM group 1, and CDM group 2. The DMRS port allocation for CDM groups 0, 1, and 2 is shown in Figure 3 and will not be repeated here. Here, CDM group 0, 1, and 2 represent CDM group indices; p0, p1, ..., p11 represent DMRS port indices.

[0086] Figure 4 is a schematic diagram of another DMRS pattern provided in an embodiment of this application. As shown in Figure 4, this DMRS pattern represents the resource pattern within a resource block (RB) on an orthogonal frequency division multiplexing (OFDM) symbol. Each code division multiplexing group occupies 2 resource units in each resource block. Thus, the resource units can be divided into 6 code division multiplexing groups: code division multiplexing group 0 to code division multiplexing group 5. The DMRS port allocation of code division multiplexing groups 0 to 5 has been shown in Figure 4 and will not be described again here.

[0087] It should be understood that different code division multiplexing (CDM) groups occupy different resource units. A CDM group can correspond to one or more DMRS ports. When corresponding to multiple DMRS ports, multiple DMRS ports within the same CDM group can be extended in the time and frequency domain using orthogonal cover codes (OCCs) and the orthogonality of different DMRS ports can be guaranteed. Therefore, terminal devices using different DMRS ports within the same CDM group theoretically do not interfere with each other or have very little interference.

[0088] It should also be understood that this application does not limit the DMRS pattern, the number of code division multiplexing groups, or the correspondence between each code division multiplexing group and the port. The DMRS patterns with 2, 3, and 6 code division multiplexing groups listed above are possible examples, and those skilled in the art can design different DMRS patterns, different numbers of code division multiplexing groups, and different port correspondence methods.

[0089] 2. Port Indicator

[0090] Access network devices indicate the DMRS port and antenna port under the current scheduling time slot to terminal devices through the "antenna port(s)" field in the downlink control information (DCI). The "antenna port" field is an index value used to look up relevant parameters in a table. The length of this field can be 4 bits, 5 bits, or 6 bits, and the access network device selects different bit lengths according to different configurations.

[0091] Table 1 below shows the mapping relationship between the DMRS port index and the code division multiplexing group index under configuration type 2, where the parameter "p" represents the DMRS port index, the parameter "CDM groupλ" represents the code division multiplexing group index, and "Δ", "[w f (0) … w f (3)]” and “[w t (0) w t (1)] indicates the parameters used during resource unit mapping. These parameters can be understood by referring to the relevant protocols and will not be elaborated here. For example, if the access network device indicates that the DMRS port index is 5 to the terminal device, the terminal device looks up the code division multiplexing group index as 2 in Table 1 below and finds the parameters used during resource unit mapping to complete the resource unit mapping. It should be understood that the mapping relationship between the DMRS port index and the code division multiplexing group index under configuration type 1 is similar to that in Table 1 above. Similarly, if the DMRS pattern shown in Figure 4 is used, the mapping relationship between the DMRS port index and the code division multiplexing group index is also similar to that in Table 1 above and will not be elaborated here.

[0092] Table 1: Mapping Relationship between DMRS Port Index and Code Division Multiplexing Group Index under Configuration Type 2

[0093] 3. Channel estimation

[0094] Taking PDSCH DMRS as an example, the terminal device receives PDSCH DMRS from the access network device, and the received signal of the terminal device on subcarrier index k is defined as follows:

[0095] Where the subscript k represents the subcarrier index, H k,target s represents the channel of the terminal device on subcarrier k. k This represents the pilot sequence of DMRS, where the subscript i indicates the interference link index, I indicates the number of interference links, and H... k,i Let s represent the channel of the i-th interfering link on subcarrier k. i,k Let n represent the pilot sequence of the i-th interference link. k Indicates noise.

[0096] Based on the received signal y k Terminal equipment can perform channel estimation on the resource unit where DMRS is located. The channel estimation method can be the least squares method, that is, for y k Divide element by s k The estimated channel at this time is:

[0097] Among them, H k,target For an ideal channel, As a distractor, For noise terms, the fewer the interference terms, the more accurate the channel estimation will be.

[0098] Access network devices indicate DMRS ports to terminal devices. Terminal devices can then determine the code division multiplexing group (CDM) based on this DMRS port, which determines the resource unit occupied in each resource block of the frequency domain resources during DMRS resource mapping. If the indication of DMRS ports between access network devices to terminal devices is independent, or if the indication of DMRS ports by access network devices to terminal devices in different cells they serve is also independent, then terminal devices accessing different access network devices or different cells may determine the same resource unit occupied by the same DMRS, causing interference between these terminal devices. For terminal devices, the more interfering terminal devices, the worse the accuracy of channel estimation, which in turn reduces the performance of demodulation based on the reference signal and affects communication reliability.

[0099] To address the aforementioned issues, this application provides two communication methods.

[0100] In the first communication method provided in the embodiments of this application, each access network device can maintain one or more code division multiplexing groups. Access network devices can exchange information. Each access network device obtains the code division multiplexing groups maintained by other access network devices from the exchanged information. Therefore, when indicating the reference signal port of terminal devices within the coverage area, each access network device tries to avoid the code division multiplexing groups maintained by other access network devices. When indicating the reference signal port of terminal devices within the coverage area of ​​different cells, reference signal ports corresponding to different code division multiplexing groups are used as much as possible.

[0101] In the second communication method provided in the embodiments of this application, the core network equipment uniformly manages the code division multiplexing groups maintained by each access network equipment, so that when indicating the reference signal port of terminal equipment within the coverage area, each access network equipment avoids the code division multiplexing groups maintained by other access network equipment as much as possible. When indicating the reference signal port of terminal equipment within the coverage area of ​​different cells, the reference signal ports corresponding to different code division multiplexing groups are used as much as possible.

[0102] The difference between the second and first communication methods is that the second method utilizes core network equipment to plan and allocate code division multiplexing groups.

[0103] It should be understood that the code division multiplexing group maintained by the access network equipment can also be understood as the code division multiplexing group used by the cell served by the access network equipment.

[0104] The two communication methods described in this application embodiment can allocate reasonable code division multiplexing groups to different access network devices or different cells as much as possible, so that the access network devices or cells do not interfere with each other. At the same time, reference signal ports are allocated to terminal devices accessing different access network devices or terminal devices accessing different cells according to reasonable code division multiplexing groups, so that the terminal devices do not interfere with each other, thereby improving the accuracy of channel estimation, thereby improving the performance of demodulation based on reference signals, and enhancing the reliability of communication.

[0105] The communication method provided in the embodiments of this application will be described in detail below with reference to Figures 5 and 6.

[0106] Figure 5 shows an exemplary flowchart of a communication method 500 provided in an embodiment of this application. This communication method 500 can be applied to the communication system 100 shown in Figure 1, and can also be applied to other communication systems; this embodiment of the application is not limited in this regard. Method 500 includes the following steps:

[0107] S510, the first access network device sends first information to the second access network device, and correspondingly, the second access network device receives the first information, which is used to indicate at least one first code division multiplexing group.

[0108] For example, access network devices can exchange information via the Xn interface. Therefore, a first access network device can send first information to a second access network device via the Xn interface, and correspondingly, the second access network device can receive the first information via the Xn interface. It should be understood that the Xn interface is merely an example; access network devices can also exchange information via other interfaces, such as the X2 interface or interfaces defined by future communication networks. This application is not limited to these, and the technical solution of this application can be applied to any logical interface between access network devices.

[0109] For example, at least one first code division multiplexing (CDM) group may include a CDM group maintained by a first access network device and / or a CDM group maintained by a third access network device. The third access network device is any one or more access network devices distinct from the first and second access network devices. The third access network device indicates the CDM group it maintains to the first access network device. When sending first information to the second access network device, it may simultaneously indicate both the CDM group maintained by the first and third access network devices. In this case, the first access network device may be a relay device. It should be understood that when sending first information to the second access network device, the first access network device may also individually indicate the CDM group it maintains or individually indicate the CDM group maintained by the third access network device; this is not limited in the embodiments of this application. It should be understood that the CDM group maintained by the access network device can be understood as the CDM group used by the cell served by the access network device.

[0110] It should be understood that the third access network device may also indicate the code division multiplexing (CDM) group maintained by the third access network device to the second access network device, and the second access network device will use the CDM group maintained by the third access network device and / or the CDM group maintained by the first access network device as at least one first CDM group. The interaction between the third access network device and the first access network device, as well as the interaction between the third access network device and the second access network device, can be referenced to the interaction between the second access network device and the first access network device.

[0111] S520, the second access network device determines, based on the first information, that at least one second code division multiplexing group used by the cell served by the second access network device is different from all or part of the code division multiplexing groups in the at least one second code division multiplexing group, and the at least one second code division multiplexing group corresponds to at least one reference signal port.

[0112] For example, the second access network device obtains at least one first code division multiplexing (CDM) group based on the first information, and determines at least one second code division multiplexing (CDM) group based on the at least one first CDM group. In other words, the second access network device updates the at least one second CDM group it maintains based on the first information. The fact that at least one second CDM group is wholly or partially different from the code division multiplexing groups in at least one first CDM group means that at least one second CDM group is as different from at least one first CDM group as possible, i.e., it avoids at least one first CDM group as much as possible. The fact that at least one second CDM group corresponds to at least one reference signal port can be understood as each second CDM group corresponding to at least one reference signal port.

[0113] In one possible implementation of this application, the cells served by the second access network device include a first cell and a second cell. The first cell uses a third code division multiplexing group (CDM) within at least one second CDM group, and the second cell uses a fourth code division multiplexing group within at least one second CDM group. The third and fourth CDM groups are different. It should be understood that the first and second cells are used to distinguish the different cells served by the second access network device, and the third and fourth CDM groups are used to distinguish the different CDM groups used by different cells.

[0114] For example, a first access network device serves three cells: cell 0 uses code division multiplexing group 0, cell 1 uses code division multiplexing group 1, and cell 2 uses code division multiplexing group 2. Code division multiplexing groups 0, 1, and 2 are indicated by the first access network device to a second access network device via a first information. The second access network device plans the code division multiplexing group for the cells it serves based on code division multiplexing groups 0, 1, and 2: cell 3 can use code division multiplexing group 3, cell 4 can use code division multiplexing group 4, and cell 5 can use code division multiplexing group 5. Thus, different access network devices use different code division multiplexing groups, preventing interference between terminal devices accessing different access network devices, and also preventing interference between terminal devices accessing different cells, as different cells use different code division multiplexing groups. If the second access network device also serves cell 6 and no other code division multiplexing group is available, cell 6 can use code division multiplexing group 0, 1 or 2, depending on the distance between cell 6 and cells 0, 1 or 2, or it can use code division multiplexing group 3, 4 or 5, depending on the distance between cell 6 and cells 3, 4 or 5, in order to minimize interference.

[0115] When the second access network device indicates the reference signal port for the terminal device accessing the second access network device, if the number of cells served by the second access network device is multiple, the second access network device can configure different reasonable code division multiplexing groups for different cells to prevent interference between different cells. According to the configured reasonable code division multiplexing groups, the second access network device allocates reference signal ports to the terminal devices accessing different cells, so that the terminal devices accessing different cells can use reasonable resources to transmit reference signals according to the reference signal ports. In this way, the terminal devices accessing different cells do not interfere with each other, further improving the accuracy of channel estimation, thereby improving the performance of demodulation based on reference signals and enhancing the reliability of communication.

[0116] S530, the second access network device sends second information to the terminal device, and correspondingly, the terminal device receives the second information, which is used to indicate all or part of the ports in at least one reference signal port.

[0117] It should be understood that the aforementioned terminal equipment is a terminal equipment within the cell served by the second access network equipment; in other words, the terminal equipment is located within the coverage area of ​​the second access network equipment.

[0118] It should also be understood that the port indicated by the second information is at least one port within a second code division multiplexing group. As mentioned above, the second access network device can be indicated through the "antenna port" field of the DCI, or through other means, which are not limited in this application.

[0119] For example, after the reference signal port indication, the second access network device can send PDSCH DMRS to the terminal device. Correspondingly, the terminal device receives the PDSCH DMRS and performs channel estimation and signal demodulation. If each cell has only one terminal device, and different cells use different code division multiplexing groups (i.e., the DMRS used by different cells occupies different resource units and is staggered in the frequency domain), then each cell can assume that there is no reference signal interference when performing channel estimation based on the DMRS, reducing the interference term. Therefore, the received signal of the terminal device is: y k =H k,target ×s k +n k

[0120] If the least squares method is used for channel estimation, the estimated channel can be regarded as an ideal channel plus a noise term.

[0121] It should be understood that this application is not limited to downlink scenarios, but can also be applied to uplink scenarios. In the uplink scenario, the terminal device sends PUSCH DMRS to the second access network device, which receives the PUSCH DMRS and performs channel estimation and signal demodulation, similar to the downlink scenario, and will not be described in detail here.

[0122] The communication method of this application embodiment involves a first access network device sending first information to a second access network device to indicate at least one first code division multiplexing (CDM) group. This allows the second access network device to determine at least one second code division multiplexing group it maintains based on the at least one first CDM group. The second access network device can ensure that the code division multiplexing groups in the at least one second code division multiplexing group are as different as possible from the code division multiplexing groups in the at least one first code division multiplexing group. Therefore, the second access network device can determine and maintain reasonable code division multiplexing groups (i.e., at least one second code division multiplexing group), thereby minimizing interference with the first access network device. The second access network device can also indicate reasonable reference signal ports to terminal devices accessing the second access network device based on the maintained reasonable code division multiplexing groups. Consequently, terminal devices accessing the second access network device can utilize reasonable resources to transmit reference signals based on the reference signal ports, minimizing interference between terminal devices accessing the second and first access network devices. This improves the accuracy of channel estimation, enhances demodulation performance based on reference signals, and strengthens communication reliability.

[0123] As an optional embodiment, method 500 further includes: S540, the second access network device sends third information to the first access network device, and correspondingly, the first access network device receives the third information, which is used to indicate at least one second code division multiplexing group. It should be understood that the sending of information from the second access network device to the first access network device can be referenced to the sending of information from the first access network device to the second access network device, and will not be described again.

[0124] It should be understood that in Figure 5, S540 precedes S530, but those skilled in the art will understand that S540 may also be implemented after S530 or simultaneously with S530, and the embodiments of this application do not limit this.

[0125] In the communication method of this application embodiment, after determining at least one second code division multiplexing group, the second access network device informs the first access network device of the at least one second code division multiplexing group maintained by the second access network device. This allows the first access network device to also avoid at least one second code division multiplexing group, thereby minimizing interference between the two access network devices. Furthermore, the first access network device allocates a reasonable reference signal port to the terminal device accessing the first access network device. The terminal device accessing the first access network device can then utilize reasonable resources to transmit reference signals based on the allocated reference signal port. This minimizes interference between the terminal devices accessing the first and second access network devices, thereby improving the accuracy of channel estimation, enhancing demodulation performance based on the reference signal, and strengthening communication reliability.

[0126] In one possible implementation of this application, the first information carries an index of at least one first code division multiplexing (CDM) group. Thus, after receiving the first information, the second access network device can obtain at least one first CDM group through the index carried in the first information, reducing signaling overhead.

[0127] In another possible implementation of this application, the first information carries indication information, which indicates that at least one first code division multiplexing group is predefined. Thus, after receiving the first information, the second access network device can obtain at least one first code division multiplexing group through the indication information carried in the first information. The indication information can be a value or an indicator, which can further reduce signaling overhead.

[0128] For example, a Served Cell Information (NR) signaling can be predefined, and a first piece of information can be predefined and carried in the Served Cell Information (NR) signaling. The fields related to the first piece of information in the Served Cell Information (NR) signaling are shown in Table 2 below.

[0129] Table 2: Fields of Served Cell Information (NR Signaling)

[0130] The information element / group name field, which is a reference signal configuration list indicating the newly added code division multiplexing (CDM) group index, includes the presence field (optional, indicating the use of a network-predefined CDM group index), the range field (maxnoofDMRSInfo indicating the maximum number of predefined CDM group indices), and the semantic description field, which provides specific information about the newly added CDM group. The information element / group name field and the semantic description field can constitute the first information, indicating the index of at least one first CDM group. For example, the information element / group name field can carry the index of at least one first CDM group, and the semantic description field can describe the specific information of at least one first CDM group. The presence field can also constitute the first information, indicating that at least one first CDM group is predefined. For example, if the presence field exists, it indicates that at least one network-predefined first CDM group is used.

[0131] For example, a first access network device sends an Xn setup request to a second access network device. The Xn setup request includes served cell information (NR) signaling, which may include an information element / group name field and a semantic description field to indicate at least one first code division multiplexing (CDM) group, or may include a presence field to indicate that at least one first CDM group is predefined. The second access network device sends an Xn setup response to the first access network device. The Xn setup response also includes served cell information (NR) signaling, which may include an information element / group name field and a semantic description field to indicate at least one second CDM group, or may include a presence field to indicate that at least one second CDM group is predefined.

[0132] It should be understood that information exchange between access network devices can also be carried on other messages / signaling, and can be dynamic, statically configured (i.e., only one information exchange), or periodically. This application does not limit this. Dynamic information exchange is beneficial for each access network device to dynamically adjust the code division multiplexing group and reference signal port indication it maintains.

[0133] It should be understood that the above example uses DMRS, and those skilled in the art will also understand that other reference signals capable of channel estimation and signal demodulation are also applicable to the technical solutions of this application.

[0134] Figure 6 shows an exemplary flowchart of another communication method 600 provided in an embodiment of this application. This communication method 600 can be applied to the communication system 100 shown in Figure 1, and can also be applied to other communication systems; this embodiment of the application does not limit its application in this regard. Method 600 includes the following steps:

[0135] S610, the core network equipment determines that at least one first code division multiplexing group used by the cell served by the first access network equipment and at least one second code division multiplexing group used by the cell served by the second access network equipment, wherein all or part of the code division multiplexing groups in the at least one second code division multiplexing group and the at least one first code division multiplexing group are different.

[0136] It should be understood that when determining code division multiplexing (CDM) groups for each access network device, the core network device may consider minimizing interference between access network devices while also ensuring fairness in CDM group usage. This application does not limit the number of CDM groups allocated to each access network device. For example, a first access network device may have more connected terminal devices or more layers, thus requiring more CDM groups. A second access network device may currently have no connected terminal devices, requiring fewer CDM groups or no CDM groups for the time being.

[0137] In addition, the fact that all or part of the code division multiplexing groups in at least one second code division multiplexing group and at least one first code division multiplexing group are different can be understood with reference to the above method 500.

[0138] S620, the core network device sends first information to the first access network device, and correspondingly, the first access network device receives the first information, which is used to indicate at least one first code division multiplexing group.

[0139] S630, the core network device sends second information to the second access network device, and correspondingly, the second access network device receives the second information, which is used to indicate at least one second code division multiplexing group.

[0140] It should be understood that in Figure 6, S620 and S630 are executed simultaneously. However, those skilled in the art will understand that S620 can also be implemented after S630 or before S630; it can also be implemented only by S620 or only by S630, and the embodiments of this application are not limited in this regard. When both S620 and S630 are implemented, the core network device determines at least one first code division multiplexing group and at least one second code division multiplexing group; when only S620 is implemented, the core network device can determine at least one first code division multiplexing group, but it is not limited to whether at least one second code division multiplexing group is determined; when only S630 is implemented, the core network device can determine at least one second code division multiplexing group, but it is not limited to whether at least one first code division multiplexing group is determined.

[0141] For example, core network devices such as AMF and access network devices can use the NG interface for information exchange. Therefore, if a core network device sends first information to a first access network device via the NG interface, the first access network device receives the first information via the NG interface; similarly, if a core network device sends second information to a second access network device via the NG interface, the second access network device receives the second information via the NG interface. It should be understood that the NG interface is merely an example; core network devices and access network devices can also exchange information through other interfaces, such as interfaces defined in future communication networks. This application is not limited to these, and the technical solution of this application can be applied to any logical interface between core network devices and access network devices.

[0142] S640, the first access network device sends fifth information to the terminal device, and correspondingly, the terminal device receives the fifth information, wherein at least one first code division multiplexing group corresponds to at least one reference signal port, and the fifth information is used to indicate all or part of the ports in the at least one reference signal port. It should be understood that this step can be understood with reference to step 530 above. It should also be understood that the terminal device is a terminal device within the cell served by the first access network device; in other words, the terminal device is located within the coverage area of ​​the first access network device.

[0143] It should also be understood that the second access network device can also send the sixth information to the terminal device in the cell it serves. Correspondingly, the terminal device receives the sixth information, wherein at least one second code division multiplexing group corresponds to at least one reference signal port, and the sixth information is used to indicate all or part of the ports in the at least one reference signal port. Similarly, it can be understood with reference to step 530 above.

[0144] After indicating the port, the first access network device and the terminal device can perform channel assessment and signal demodulation based on the port, as described in the embodiment of method 500 above, and will not be repeated here. Similarly, the second access network device and the terminal device can also perform the same interaction and operation, and will not be repeated here.

[0145] In the communication method of this application embodiment, the core network equipment allocates different code division multiplexing (CDM) groups to different access network equipment as much as possible, so that at least one first CDM group used by the cell served by the first access network equipment is as different as possible from at least one second CDM group used by the cell served by the second access network equipment. Therefore, a reasonable CDM group (i.e., at least one first CDM group) can be indicated to the first access network equipment, a reasonable CDM group (i.e., at least one second CDM group) can be indicated to the second access network equipment, or reasonable CDM groups can be indicated to both the first and second access network equipment simultaneously. This minimizes interference between the access network equipment. The first access network equipment can also indicate a reasonable reference signal port to the terminal equipment accessing the first access network equipment based on the indicated reasonable CDM group. Thus, the terminal equipment accessing the first access network equipment can utilize reasonable resources to transmit reference signals based on the reference signal port, minimizing interference between the terminal equipment accessing the first and second access network equipment. This improves the accuracy of channel estimation, enhances demodulation performance based on reference signals, and strengthens communication reliability.

[0146] Similarly, the second access network device can also indicate a reasonable reference signal port to the terminal device accessing the second access network device according to the indicated reasonable code division multiplexing group. Thus, the terminal device accessing the second access network device can use reasonable resources to transmit reference signals according to the reference signal port, so that the terminal device accessing the second access network device and the terminal device accessing the first access network device do not interfere with each other as much as possible, so as to achieve the same technical effect as above.

[0147] In one possible implementation of this application, the cells served by the first access network device include a first cell and a second cell. The first cell uses a fifth code division multiplexing group (CDM) in at least one first CDM group, and the second cell uses a sixth CDM group in the at least one first CDM group. The fifth CDM group and the sixth CDM group are different. It should be understood that the first cell and the second cell are used to distinguish different cells served by the first access network device, and the fifth and sixth CDM groups are used to distinguish different CDM groups used by different cells. Different cells use different CDM groups, which can be understood with reference to the relevant description of method 500 above. For the second access network device, different cells can also use different CDM groups, which will not be elaborated here.

[0148] As an optional embodiment, method 600 further includes: S650, the first access network device sends third information to the core network device, and correspondingly, the core network device receives the third information; S660, the second access network device sends fourth information to the core network device, and correspondingly, the core network device receives the fourth information, wherein the third information is used to indicate at least one third code division multiplexing group, and the at least one third code division multiplexing group is a candidate code division multiplexing group used by the cell served by the first access network device, and the fourth information is used to indicate at least one fourth code division multiplexing group, and the at least one fourth code division multiplexing group is a candidate code division multiplexing group used by the cell served by the second access network device. S610 specifically includes: determining at least one first code division multiplexing group and / or at least one second code division multiplexing group based on the third information and the fourth information, wherein all or part of the code division multiplexing groups in the at least one first code division multiplexing group and the at least one third code division multiplexing group are the same, and all or part of the code division multiplexing groups in the at least one second code division multiplexing group and the at least one fourth code division multiplexing group are the same.

[0149] It should be understood that the sending of third information by the first access network device to the core network device and the sending of fourth information by the second access network device to the core network device can be referred to the description of the NG interface above, and will not be repeated here.

[0150] It should be understood that in Figure 6, S650 and S660 are executed simultaneously. However, those skilled in the art will understand that S650 may be implemented after S660 or before S660; or only S650 or only S660 may be implemented, and the embodiments of this application are not limited in this respect.

[0151] In the communication method of this application embodiment, the core network device can determine at least one first code division multiplexing group and / or at least one second code division multiplexing group by integrating at least one third code division multiplexing group and / or at least one fourth code division multiplexing group, so that the determined at least one first code division multiplexing group and / or at least one second code division multiplexing group is more in line with the actual situation of the first access network device and / or the second access network device, further improving the accuracy of channel estimation, enhancing the performance of demodulation based on reference signals, and strengthening the reliability of communication.

[0152] In one possible implementation of this application, the third information carries an index of at least one third code division multiplexing group, and / or, the fourth information carries an index of at least one fourth code division multiplexing group.

[0153] In another possible implementation of this application, the third information carries first indication information, which is used to indicate that at least one third code division multiplexing group is predefined; and / or, the fourth information carries second indication information, which is used to indicate that at least one fourth code division multiplexing group is predefined.

[0154] The third or fourth information can be understood by referring to the first information in Method 500, and will not be elaborated here.

[0155] For example, a first access network device can send a RAN configuration update message to a core network device via the NG interface. This message includes served cell information (NR) signaling or similar signaling to carry third information. A second access network device can send a RAN configuration update message to the core network device via the NG interface. This message includes served cell information (NR) signaling or similar signaling to carry fourth information. The core network device can determine at least one first code division multiplexing (CDM) group and / or at least one second code division multiplexing group by combining at least one third CDM group and at least one fourth CDM group. The core network device can send an AMF configuration update message to the first access network device via the NG interface. This message includes served cell information (NR) signaling or similar signaling to carry first information. The core network device can send an AMF configuration update message to the second access network device via the NG interface. This message includes served cell information (NR) signaling or similar signaling to carry second information. The first access network device and / or the second access network device can perform port indication based on the first information and / or the second information.

[0156] It should be understood that information exchange between core network equipment and access network equipment can also be carried on other messages / signaling. Information exchange can be dynamic, statically configured (i.e., only one information exchange), or periodically performed; this application does not limit this. Dynamic information exchange facilitates the dynamic adjustment of the code division multiplexing groups maintained by each access network equipment.

[0157] The foregoing has detailed examples of the methods provided in this application. Based on these examples, it can be understood that access network devices or core network devices, in order to implement the aforementioned functions, include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art will readily recognize that, based on the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application. The communication apparatus of an embodiment of this application is described below with reference to Figures 7 and 8.

[0158] Figure 7 is an exemplary block diagram of a communication device 700 provided in an embodiment of this application. The communication device 700 may include a transceiver unit 710 and a processing unit 720.

[0159] In one implementation of this application, the communication device 700 can be used to execute the steps or processes of the second access network device in the above-described communication method 500.

[0160] The transceiver unit 710 is configured to: receive first information from a first access network device, the first information indicating at least one first code division multiplexing group; the processing unit 720 is configured to: determine, based on the first information, at least one second code division multiplexing group used by the cell served by the communication device 700, wherein the at least one second code division multiplexing group is entirely or partially different from the code division multiplexing groups in the at least one first code division multiplexing group, and the at least one second code division multiplexing group corresponds to at least one reference signal port; the transceiver unit 710 is further configured to: send second information to a terminal device, the second information indicating all or some of the ports in the at least one reference signal port.

[0161] Optionally, the first information carries an index of the at least one first code division multiplexing group.

[0162] Optionally, the first information carries indication information, which is used to indicate that the at least one first code division multiplexing group is predefined.

[0163] Optionally, the cell served by the communication device 700 includes a first cell and a second cell, wherein the first cell uses a third code division multiplexing group in the at least one second code division multiplexing group, and the second cell uses a fourth code division multiplexing group in the at least one second code division multiplexing group, wherein the third code division multiplexing group is different from the fourth code division multiplexing group.

[0164] Optionally, the transceiver unit 710 is further configured to: send third information to the first access network device, the third information being used to indicate the at least one second code division multiplexer group.

[0165] In another implementation of this application, the communication device 700 can be used to execute the steps or processes of the core network device in the communication method 600 described above.

[0166] The processing unit 720 is configured to: determine at least one first code division multiplexing group (CDM) used by the cell served by the first access network device and / or at least one second code division multiplexing group used by the cell served by the second access network device, wherein all or part of the code division multiplexing groups in the at least one second code division multiplexing group are different from those in the at least one first code division multiplexing group; the transceiver unit 710 is configured to: send first information to the first access network device and / or send second information to the second access network device, wherein the first information is used to indicate the at least one first code division multiplexing group and the second information is used to indicate the at least one second code division multiplexing group.

[0167] Optionally, the transceiver unit 710 is further configured to: receive third information from the first access network device, and / or receive fourth information from the second access network device, wherein the third information is used to indicate at least one third code division multiplexing group (CDM), the at least one third CDM being a candidate CDM used by the cell served by the first access network device, and the fourth information is used to indicate at least one fourth CDM, the at least one fourth CDM being a candidate CDM used by the cell served by the second access network device; the processing unit 720 is further configured to: determine, based on the third information and the fourth information, the at least one first CDM and / or the at least one second CDM, wherein all or part of the CDM in the at least one first CDM and the at least one third CDM are the same, and all or part of the CDM in the at least one second CDM and the at least one fourth CDM are the same.

[0168] Optionally, the third information carries the index of the at least one third code division multiplexing group, and / or the fourth information carries the index of the at least one fourth code division multiplexing group.

[0169] Optionally, the third information carries first indication information, which is used to indicate that the at least one third code division multiplexing group is predefined; and / or, the fourth information carries second indication information, which is used to indicate that the at least one fourth code division multiplexing group is predefined.

[0170] In another implementation of the embodiments of this application, the communication device 700 can be used to execute the steps or processes of the first access network device or the second access network device in the above-described communication method 600.

[0171] The transceiver unit 710 further includes a receiving unit and a transmitting unit. The receiving unit is configured to receive first information from the core network equipment, the first information indicating at least one first code division multiplexing group (CDM), the at least one CDM being the CDM used by the cell served by the communication device 700, and the at least one first CDM corresponding to at least one reference signal port; the transmitting unit is configured to transmit fifth information to the terminal equipment, the fifth information indicating all or some of the at least one reference signal port.

[0172] Optionally, the cell served by the communication device 700 includes a first cell and a second cell. The first cell uses the fifth code division multiplexing group in the at least one first code division multiplexing group, and the second cell uses the sixth code division multiplexing group in the at least one first code division multiplexing group. The fifth code division multiplexing group is different from the sixth code division multiplexing group.

[0173] Optionally, the sending unit is further configured to: send the third information to the core network equipment, the third information being used to indicate at least one third code division multiplexing group, the at least one third code division multiplexing group being a candidate code division multiplexing group used by the cell served by the communication device 700, and the code division multiplexing groups in the at least one first code division multiplexing group and the at least one third code division multiplexing group being all or part of the same.

[0174] The communication device 700 of each of the above schemes has the function of implementing the corresponding steps performed by the access network device or core network device in the above methods; the function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transmitter and a receiver, and other units, such as the processing unit, can be replaced by a processor, which respectively executes the transceiver operations and related processing operations in each method embodiment.

[0175] It should be understood that the communication device 700 here is embodied in the form of a functional unit. The term "unit" here may refer to application-specific integrated circuits (ASICs), electronic circuits, processors (e.g., shared processors, proprietary processors, or group processors) and memories for executing one or more software or firmware programs, combined logic circuits, and / or other suitable components that support the described functions.

[0176] In embodiments of this application, the communication device in FIG7 can also be a chip or a chip system, such as a system on chip (SoC). Correspondingly, the transceiver unit can be the transceiver circuit of the chip, which is not limited here.

[0177] Figure 8 is an exemplary block diagram of another communication device 800 provided in an embodiment of this application. The communication device 800 includes a transceiver 820 and a processor 810. In another implementation of this application, the communication device 800 may further include a memory 830. The processor 810, transceiver 820, and memory 830 communicate with each other through internal connection paths. The memory 830 is used to store instructions, and the processor 810 is used to execute the instructions stored in the memory 830 to control the transceiver 820 to send and / or receive signals.

[0178] In one possible implementation, the communication device 800 can be used to execute the steps or processes of the second access network device in the communication method 500 described above. In another possible implementation, the communication device 800 can be used to execute the steps or processes of the core network device in the communication method 600 described above. In yet another possible implementation, the communication device 800 can be used to execute the steps or processes of the first access network device or the second access network device in the communication method 600 described above.

[0179] It should be understood that the communication device 800 may specifically be the access network device or core network device in the above embodiments, and may be used to execute the various steps and / or processes corresponding to the access network device or core network device in the above method embodiments. In one implementation of this application embodiment, the memory 830 may include a read-only memory and a random access memory, and provides instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor 810 may be used to execute instructions stored in the memory, and when the processor 810 executes instructions stored in the memory, the processor 810 is used to execute the various steps and / or processes of the above method embodiments corresponding to the access network device or core network device.

[0180] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in the embodiments of this application can be directly manifested as execution by a hardware processor, or as a combination of hardware and software modules within the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0181] It should be noted that the processor in the embodiments of this application can be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiments can be completed by the integrated logic circuits in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0182] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0183] This application also provides a communication system, which includes the first access network device, the second access network device, and the terminal device in the aforementioned method 500.

[0184] This application also provides another communication system, which includes the first access network device, the second access network device, the core network device, and the terminal device in the aforementioned method 600.

[0185] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a computer, implements the steps and processes corresponding to the second access network device in the aforementioned method 500, or the steps and processes corresponding to the core network device in the aforementioned method 600, or the steps and processes corresponding to the first access network device or the second access network device.

[0186] This application also provides a computer program product, which, when executed by a computer, implements the steps and processes corresponding to the second access network device in the aforementioned method 500, or the steps and processes corresponding to the core network device in the aforementioned method 600, or the steps and processes corresponding to the first access network device or the second access network device.

[0187] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0188] The access network devices or core network devices in the above-described device embodiments correspond completely to the access network devices or core network devices in the method embodiments. Corresponding modules or units execute corresponding steps. For example, the transceiver unit (transceiver) executes the sending and receiving steps in the method embodiments, while other steps besides sending and receiving can be executed by the processing unit (processor). The specific functions of each module can be found in the corresponding method embodiments. There can be one or more processors.

[0189] It should be understood that the term "embodiment" used throughout the specification means that specific features, structures, or characteristics related to an embodiment can be combined in any suitable manner in one or more embodiments. It should also be understood that in the various embodiments of this application, the sequence numbers of the above processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0190] As used in this specification, the terms "component," "module," "system," etc., are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, applications running on computing devices and computing devices can both be components. One or more components may reside in a process and / or an execution thread, and components may be located on a single computer and / or distributed among two or more computers. Furthermore, these components can be executed from various computer-readable media on which various data structures are stored. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0191] Those skilled in the art will recognize that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0192] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0193] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0194] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0195] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0196] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, they generate, in whole or in part, the flow or function according to the embodiments of this application. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., a solid-state disk (SSD)).

Claims

A communication method characterized by comprising: The method comprises: receiving first information from a first access network device, the first information being used for indicating at least one first code division multiplexing group; determining, according to the first information, at least one second code division multiplexing group used by a cell served by a second access network device, code division multiplexing groups in the at least one second code division multiplexing group and the at least one first code division multiplexing group being all or partially different, the at least one second code division multiplexing group corresponding to at least one reference signal port; sending second information to a terminal device, the second information being used for indicating all or part of ports in the at least one reference signal port. The method of claim 1, wherein The first information carries an index of the at least one first code division multiplexing group. The method of claim 1, wherein The first information carries indication information, the indication information being used for indicating that the at least one first code division multiplexing group is predefined. The method according to any one of claims 1 to 3, characterized in that The cell served by the second access network device comprises a first cell and a second cell, the first cell using a third code division multiplexing group in the at least one second code division multiplexing group, the second cell using a fourth code division multiplexing group in the at least one second code division multiplexing group, the third code division multiplexing group being different from the fourth code division multiplexing group. The method according to any one of claims 1 to 4, characterized in that The method further comprises: sending third information to the first access network device, the third information being used for indicating the at least one second code division multiplexing group. A communication method characterized by comprising: The method comprises: determining at least one first code division multiplexing group used by a cell served by a first access network device and / or at least one second code division multiplexing group used by a cell served by a second access network device, code division multiplexing groups in the at least one second code division multiplexing group and the at least one first code division multiplexing group being all or partially different; sending first information to the first access network device and / or sending second information to the second access network device, the first information being used for indicating the at least one first code division multiplexing group, the second information being used for indicating the at least one second code division multiplexing group. The method according to claim 6, characterized in that The method further comprises: receiving third information from the first access network device and / or receiving fourth information from the second access network device, the third information being used for indicating at least one third code division multiplexing group, the at least one third code division multiplexing group being a candidate code division multiplexing group used by the cell served by the first access network device, the fourth information being used for indicating at least one fourth code division multiplexing group, the at least one fourth code division multiplexing group being a candidate code division multiplexing group used by the cell served by the second access network device; The determining of the at least one first code division multiplexing group used by the cell served by the first access network device and / or the at least one second code division multiplexing group used by the cell served by the second access network device comprises: determining, according to the third information and the fourth information, the at least one first code division multiplexing group and / or the at least one second code division multiplexing group, code division multiplexing groups in the at least one first code division multiplexing group and the at least one third code division multiplexing group being all or partially the same, code division multiplexing groups in the at least one second code division multiplexing group and the at least one fourth code division multiplexing group being all or partially the same. The method of claim 7, wherein The third information carries indexes of the at least one third code division multiplexing group, and / or the fourth information carries indexes of the at least one fourth code division multiplexing group. The method of claim 7, wherein The third information carries first indication information, and the first indication information is used to indicate that the at least one third code division multiplexing group is predefined; and / or The fourth information carries second indication information, and the second indication information is used to indicate that the at least one fourth code division multiplexing group is predefined. A communication method characterized by comprising: Comprising: receiving first information from a core network device, the first information being used to indicate at least one first code division multiplexing group, the at least one first code division multiplexing group being a code division multiplexing group used by a cell served by an access network device, the at least one first code division multiplexing group corresponding to at least one reference signal port; sending fifth information to a terminal device, the fifth information being used to indicate all or part of the at least one reference signal port. The method of claim 10, wherein The cell served by the access network device comprises a first cell and a second cell, the first cell uses a fifth code division multiplexing group in the at least one first code division multiplexing group, and the second cell uses a sixth code division multiplexing group in the at least one first code division multiplexing group, the fifth code division multiplexing group being different from the sixth code division multiplexing group. The method according to claim 10 or 11, characterized in that The method further comprises: sending third information to the core network device, the third information being used to indicate at least one third code division multiplexing group, the at least one third code division multiplexing group being a candidate code division multiplexing group used by the cell served by the access network device, code division multiplexing groups in the at least one first code division multiplexing group and the at least one third code division multiplexing group are all or partially the same. A communication device, characterized by Comprising: a transceiver unit, configured to receive first information from a first access network device, the first information being used to indicate at least one first code division multiplexing group; a processing unit, configured to determine, according to the first information, at least one second code division multiplexing group used by a cell served by a communication apparatus, code division multiplexing groups in the at least one second code division multiplexing group and the at least one first code division multiplexing group being all or partially different, the at least one second code division multiplexing group corresponding to at least one reference signal port; the transceiver unit is further configured to send second information to a terminal device, the second information being used to indicate all or part of the at least one reference signal port. The apparatus of claim 13, wherein The first information carries indexes of the at least one first code division multiplexing group. The apparatus of claim 13, wherein The first information carries indication information, and the indication information is used to indicate that the at least one first code division multiplexing group is predefined. The apparatus according to any one of claims 13 to 15, characterized in that The cell served by the communication apparatus comprises a first cell and a second cell, the first cell uses a third code division multiplexing group in the at least one second code division multiplexing group, and the second cell uses a fourth code division multiplexing group in the at least one second code division multiplexing group, the third code division multiplexing group being different from the fourth code division multiplexing group. The apparatus according to any one of claims 13 to 16, characterized in that The transceiver unit is further configured to: send third information to the first access network device, the third information being used to indicate the at least one second code division multiplexing group. A communication device characterized by comprising: Comprising: The processing unit is configured to determine at least one first code division multiplexing group used by a cell served by the first access network device and / or at least one second code division multiplexing group used by a cell served by the second access network device, wherein the code division multiplexing groups in the at least one second code division multiplexing group and the at least one first code division multiplexing group are all or partially different; The transceiving unit is configured to send first information to the first access network device, and / or send second information to the second access network device, wherein the first information is used to indicate the at least one first code division multiplexing group, and the second information is used to indicate the at least one second code division multiplexing group. The apparatus of claim 18, wherein The transceiving unit is further configured to receive third information from the first access network device, and / or receive fourth information from the second access network device, wherein the third information is used to indicate at least one third code division multiplexing group, and the at least one third code division multiplexing group is a candidate code division multiplexing group used by a cell served by the first access network device, and the fourth information is used to indicate at least one fourth code division multiplexing group, and the at least one fourth code division multiplexing group is a candidate code division multiplexing group used by a cell served by the second access network device. The processing unit is further configured to determine the at least one first code division multiplexing group and / or the at least one second code division multiplexing group according to the third information and the fourth information, wherein the code division multiplexing groups in the at least one first code division multiplexing group and the at least one third code division multiplexing group are all or partially the same, and the code division multiplexing groups in the at least one second code division multiplexing group and the at least one fourth code division multiplexing group are all or partially the same. The apparatus of claim 19, wherein The third information carries an index of the at least one third code division multiplexing group, and / or the fourth information carries an index of the at least one fourth code division multiplexing group. The apparatus of claim 19, wherein The third information carries first indication information, and the first indication information is used to indicate that the at least one third code division multiplexing group is predefined; and / or The fourth information carries second indication information, and the second indication information is used to indicate that the at least one fourth code division multiplexing group is predefined. A communication device, characterized by The receiving unit is configured to receive first information from a core network device, wherein the first information is used to indicate at least one first code division multiplexing group, and the at least one first code division multiplexing group is a code division multiplexing group used by a cell served by a communication apparatus, and the at least one first code division multiplexing group corresponds to at least one reference signal port; The sending unit is configured to send fifth information to a terminal device, and the fifth information is used to indicate all or part of the at least one reference signal port. The cell served by the communication apparatus includes a first cell and a second cell, the first cell uses a fifth code division multiplexing group in the at least one first code division multiplexing group, and the second cell uses a sixth code division multiplexing group in the at least one first code division multiplexing group, wherein the fifth code division multiplexing group is different from the sixth code division multiplexing group. The apparatus of claim 22, wherein The sending unit is further configured to: The apparatus of claim 22 or 23, wherein ​ sending third information to the core network device, the third information being used for indicating at least one third code division multiplexing group, the at least one third code division multiplexing group being a candidate code division multiplexing group used by a cell served by the communication device, code division multiplexing groups in the at least one first code division multiplexing group and the at least one third code division multiplexing group are all or partially identical. A communication device characterized by comprising: comprise: a processor and a memory, the processor and the memory being coupled, the processor being used for controlling the communication device to implement the method in any one of claims 1 to 5, or the method in any one of claims 6 to 9, or the method in any one of claims 10 to 12. A computer-readable storage medium, characterized by, the computer program or instructions stored in the computer readable storage medium, when executed by the communication device, implement the method in any one of claims 1 to 5, or the method in any one of claims 6 to 9, or the method in any one of claims 10 to 12. A computer program product, characterized in that the computer program product comprises instructions, when the instructions are run on a computer, implement the method in any one of claims 1 to 5, or the method in any one of claims 6 to 9, or the method in any one of claims 10 to 12.

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