CN117014957A

CN117014957A - Control information transmission method and device

Info

Publication number: CN117014957A
Application number: CN202210471496.5A
Authority: CN
Inventors: 黄宗浩; 李航; 黄秀璇; 丁梦颖
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2023-11-07
Also published as: WO2023207922A1

Abstract

A control information transmission method and apparatus, in this method, the radio access network apparatus carries on the segmentation processing to DCI, get M second subsequences; coding each second subsequence in the M second subsequences to obtain M first subsequences; performing cascading operation on the M first subsequences to obtain a second sequence; modulating the second sequence to generate a first sequence; the first sequence is carried over M x N CCEs. Compared with the traditional DCI transmission scheme, the information capacity indicated by the DCI in the scheme is improved to a greater extent, and the expansion of communication functions related to the DCI is possible.

Description

Control information transmission method and device

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a control information transmission method and apparatus.

Background

In the fifth generation (5th generation,5G) mobile communication system, in the downlink transmission process performed by the radio access network device to the terminal, information sent by the radio access network device to the terminal is referred to as downlink information, and the downlink information includes downlink control information and downlink data information. The downlink control channel is used to carry downlink control information (downlink control information, DCI), which may be a physical downlink control channel (physical downlink control channel, PDCCH); the downlink data channel is used to carry downlink data information, and the downlink data channel may be a physical downlink shared channel (physical downlink shared channel, PDSCH). The DCI carried in the PDCCH is used to indicate configuration information (e.g., time/frequency domain location, modulation information, coding information, etc.) of the PDSCH.

Disclosure of Invention

Due to the encoding limitations of current encoders, the length of DCI needs to be smaller than the set length. However, as the communication standard evolves, the corresponding control field needs to be added to the DCI while the communication function is newly added, and the length of the DCI will be increased. Based on the problem, the application provides a control information transmission method and a control information transmission device, which are used for providing a flexible DCI transmission scheme.

In a first aspect, a control information transmission method is provided. The method may be performed by the terminal or by a chip of the terminal. In the method, a terminal receives a first sequence from a radio access network device, wherein the first sequence is borne on M x N CCEs. Wherein M is an integer greater than 1, and N is a positive integer. The terminal demodulates the first sequence to generate a second sequence, and then processes the second sequence to obtain M first subsequences. And the terminal carries out decoding processing on the M first subsequences to obtain M second subsequences. And if the terminal passes the verification of each second subsequence in the M second subsequences, the terminal generates DCI according to the M second subsequences.

Based on the above scheme, the terminal may obtain the first sequence from the m×n CCEs, demodulate the first sequence to obtain the second sequence, and then process the second sequence into M first sub-sequences, where the terminal decodes the M first sub-sequences to obtain M second sub-sequences, and each second sub-sequence may include part of control information, so that the terminal may increase the information capacity indicated by DCI generated according to the M second sub-sequences to a greater extent than the information capacity indicated by DCI in the conventional DCI transmission scheme, thereby providing a possibility for expanding the communication function related to DCI.

In a possible implementation manner, a terminal processes the second sequence according to a mapping relationship between M first sub-sequences in the second sequence and the m×n CCEs to obtain the M first sub-sequences; wherein, the modulation symbol corresponding to each first sub-sequence in the M first sub-sequences is mapped to N CCEs in the m×n CCEs, and the modulation symbol corresponding to a different first sub-sequence is mapped to N different CCEs.

Based on the scheme, the modulation symbol corresponding to each first sub-sequence in the M first sub-sequences is mapped to N CCEs, so that the terminal can multiplex the existing hardware conveniently, and the implementation is simplified.

In one possible implementation manner, the terminal performs a concatenation operation on the M second sub-sequences according to the order in which the modulation symbols corresponding to the M second sub-sequences are mapped to the m×n CCEs, so as to generate the DCI.

In one possible implementation, after the terminal performs the concatenation operation on the M second sub-sequences, the padding field is deleted.

In a possible implementation manner, the terminal determines the segmentation number M of the second sequence according to the CCE aggregation level, the length of the DCI and a first correspondence, where the first correspondence is a correspondence between the length of the DCI, the CCE aggregation level and the segmentation number M; or the terminal determines the segmentation number M of the second sequence according to the CCE aggregation level and a second corresponding relation, wherein the second corresponding relation is the corresponding relation between the CCE aggregation level and the segmentation number M.

In one possible implementation, the first correspondence or the second correspondence is predefined by a protocol, or the terminal receives a first radio resource control RRC signaling from the radio access network device; the first RRC signaling indicates the first correspondence or the second correspondence.

In one possible implementation, the terminal receives a second RRC signaling from the radio access network device; the second RRC signaling indicates the number of segments M.

In one possible implementation manner, if the verification of any one of the M second sub-sequences is not passed, the terminal stops decoding processing of the first sub-sequence corresponding to the second sub-sequence which is not verified in the M second sub-sequences; or if the verification of any one of the M second sub-sequences is not passed, the terminal determines the control information according to at least one second sub-sequence which is passed by the verification in the M second sub-sequences.

Based on the above design, the terminal may stop the decoding process when the verification of any one of the M second sub-sequences fails. Or the terminal can determine the control information according to at least one second subsequence passing the verification in the M second subsequences, so as to fully utilize the available field in the at least one second subsequence passing the verification and improve the communication efficiency.

In one possible implementation, the decoding process may include: at least one of de-rate matching, channel decoding, de-interleaving processing, and cyclic redundancy check.

In one possible implementation manner, after demodulating the first sequence, the terminal performs descrambling on the demodulated first sequence to generate the second sequence.

In a second aspect, a control information transmission method is provided. The method may be performed by the radio access network device or by a chip of the radio access network device. In the method, a radio access network device performs segmentation processing on Downlink Control Information (DCI) according to the segmentation number (M) of the DCI to obtain M second subsequences, wherein M is an integer greater than 1. The wireless access network device respectively carries out coding processing on each second subsequence in the M second subsequences to obtain M first subsequences, then carries out cascading operation on the M first subsequences to obtain second sequences, and then modulates the second sequences to generate first sequences. The wireless access network device sends the first sequence to the terminal, wherein the first sequence is borne on M x N control channel units (CCEs), M x N is a CCE aggregation level, and N is a positive integer. The method is a method on the radio access network side corresponding to the first aspect, and thus the advantages achieved by the first aspect can also be achieved.

In one possible implementation, the modulation symbol corresponding to each of the M first sub-sequences is mapped onto N CCEs of the m×n CCEs, and the modulation symbol corresponding to a different first sub-sequence is mapped onto N different CCEs.

In one possible implementation, the radio access network device determines the length of each of the M second sub-sequences according to the length of the DCI and the number of segments M of the DCI. And the wireless access network equipment performs segmentation processing on the downlink control information according to the length of each second sub-sequence to obtain M second sub-sequences.

In one possible implementation, the M second subsequences are the same length; or the lengths of the first M-1 second subsequences in the M second subsequences are the same; or the lengths of the last M-1 second subsequences in the M second subsequences are the same.

In one possible implementation, the radio access network device adds a padding field in the DCI to make the lengths of the M second sub-sequences the same.

In one possible implementation manner, the radio access network device determines the segmentation number M of the DCI according to the CCE aggregation level, the length of the DCI, and a first correspondence, where the first correspondence is a correspondence between the length of the DCI, the CCE aggregation level, and the segmentation number M; or the wireless access network equipment determines the segmentation number M of the DCI according to the CCE aggregation level and a second corresponding relation, wherein the second corresponding relation is the corresponding relation between the CCE aggregation level and the segmentation number M.

In one possible implementation, the first correspondence or the second correspondence is predefined for a protocol; or the radio access network equipment sends a first Radio Resource Control (RRC) signaling to the terminal, wherein the first RRC signaling indicates the first corresponding relation or the second corresponding relation.

In one possible implementation, the radio access network device sends a second RRC signaling to the terminal; the second RRC signaling indicates the number of segments M.

In one possible implementation, the encoding process may include: at least one of cyclic redundancy check field, interleaving process, channel coding, and rate matching is added.

In one possible implementation, the radio access network device scrambles the second sequence before modulating the second sequence.

In a third aspect, a communication device is provided, which may be a terminal or a chip in a terminal, comprising a transceiver unit and a processing unit.

And the receiving and transmitting unit is used for receiving a first sequence from the wireless access network equipment, wherein the first sequence is borne on M x N CCEs. Wherein M is an integer greater than 1, and N is a positive integer.

And the processing unit is used for demodulating the first sequence to generate a second sequence, and then processing the second sequence to obtain M first subsequences. And the terminal carries out decoding processing on the M first subsequences to obtain M second subsequences. And if the terminal passes the verification of each second subsequence in the M second subsequences, the terminal generates DCI according to the M second subsequences.

In one design, a processing unit is specifically configured to process the second sequence according to a mapping relationship between M first sub-sequences in the second sequence and the m×n CCEs to obtain the M first sub-sequences; wherein, the modulation symbol corresponding to each first sub-sequence in the M first sub-sequences is mapped to N CCEs in the m×n CCEs, and the modulation symbol corresponding to a different first sub-sequence is mapped to N different CCEs.

Wherein a more detailed description of the scheme may be found in the above-mentioned related description of the first aspect.

In a fourth aspect, a communication apparatus is provided, which may be a radio access network device or a module in a radio access network device, the communication apparatus comprising a transceiver unit and a processing unit.

The processing unit is configured to perform segmentation processing on the DCI according to a segmentation number M of downlink control information DCI to obtain M second subsequences, where M is an integer greater than 1; respectively carrying out coding treatment on each second subsequence in the M second subsequences to obtain M first subsequences; performing cascading operation on the M first subsequences to obtain a second sequence; modulating the second sequence to generate a first sequence;

The transceiver unit is configured to send the first sequence to a terminal, where the first sequence is carried on m×n control channel elements CCEs, where m×n is a CCE aggregation level, and N is a positive integer.

In one design, modulation symbols corresponding to each of the M first sub-sequences are mapped onto N CCEs of the m×n CCEs, and modulation symbols corresponding to different first sub-sequences are mapped onto N different CCEs.

Wherein a more detailed description of the scheme may be found in relation to the second aspect above.

In a fifth aspect, the present application provides a communications device comprising a processor coupled to a memory for storing a computer program or instructions for execution by the processor to perform the respective implementation of the first or second aspects described above. The memory may be located within the device or may be located external to the device. The number of processors is one or more.

In a sixth aspect, the present application provides a communication apparatus comprising: a processor for communicating with other devices, and interface circuitry for implementing the methods of the first or second aspects described above.

In a seventh aspect, the present application provides a communication system comprising: a terminal for performing the above-described respective implementation methods of the first aspect, and a radio access network device for performing the above-described respective implementation methods of the second aspect.

In an eighth aspect, the present application further provides a chip system, including: a processor, configured to perform each implementation method of the first aspect or the second aspect.

In a ninth aspect, the application also provides a computer program product comprising a computer program which, when run, causes the implementation of the methods of the first or second aspects described above.

In a tenth aspect, the present application also provides a computer readable storage medium having stored therein a computer program or instructions which, when run on a computer, implement the respective implementation methods of the first or second aspects described above.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system to which an embodiment of the present application is applied;

fig. 2 is a schematic diagram of a resource occupied by a PDCCH according to an embodiment of the present application;

fig. 3 is a schematic diagram of a DCI processing flow provided in an embodiment of the present application;

fig. 4 is an exemplary flowchart of a control information transmission method according to an embodiment of the present application;

Fig. 5 is an exemplary diagram of a mapping relationship between a first sub-sequence and CCE according to an embodiment of the present application;

fig. 6 is a schematic diagram of mapping relationships between a first sub-sequence, a second sub-sequence and CCEs provided in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

Fig. 1 is a schematic architecture diagram of a communication system 1000 to which an embodiment of the application applies. As shown in fig. 1, the communication system comprises a radio access network 100 and a core network 200, and optionally the communication system 1000 may further comprise the internet 300. The radio access network 100 may include at least one radio access network device (e.g., 110a and 110b in fig. 1) and may also include at least one terminal (e.g., 120a-120j in fig. 1). The terminal is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminals and the radio access network device may be connected to each other by wired or wireless means. Fig. 1 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 1.

The radio access network device is an access device to which the terminal accesses the communication system by wireless. The radio access network device may be a base station (base station), an evolved NodeB (eNodeB), a transmission and reception point (transmission reception point, TRP), a next generation NodeB (gNB) in a fifth generation (5th generation,5G) mobile communication system, a next generation base station in a sixth generation (6th generation,6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc.; the present application may also be a module or unit that performs a function of a base station part, for example, a Central Unit (CU) or a Distributed Unit (DU). The CU can complete the functions of a radio resource control protocol and a packet data convergence layer protocol (packet data convergence protocol, PDCP) of the base station and can also complete the functions of a service data adaptation protocol (service data adaptation protocol, SDAP); the DU performs the functions of the radio link control layer and the medium access control (medium access control, MAC) layer of the base station, and may also perform the functions of a part of the physical layer or the entire physical layer, and for a detailed description of the above protocol layers, reference may be made to the relevant technical specifications of the third generation partnership project (3rd generation partnership project,3GPP). The radio access network device may be a macro base station (e.g. 110a in fig. 1), a micro base station or an indoor station (e.g. 110b in fig. 1), a relay node or a donor node, etc. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the wireless access network equipment. For convenience of description, a base station will be described below as an example of a radio access network device.

A terminal is a device having a wireless transceiving function, and can transmit a signal to a base station or receive a signal from a base station. A terminal may also be referred to as a terminal device, user Equipment (UE), mobile station, mobile terminal, etc. The terminal may be widely applied to various scenes, for example, device-to-device (D2D), vehicle-to-device (vehicle to everything, V2X) communication, machine-type communication (MTC), internet of things (internet of things, IOT), virtual reality, augmented reality, industrial control, autopilot, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, and the like. The terminal can be a mobile phone, a tablet personal computer, a computer with a wireless receiving and transmitting function, a wearable device, a vehicle, an airplane, a ship, a robot, a mechanical arm, intelligent household equipment and the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal.

The base station and the terminal may be fixed in position or movable. Base stations and terminals may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aircraft, balloons and satellites. The embodiment of the application does not limit the application scenes of the base station and the terminal.

The roles of base station and terminal may be relative, e.g., helicopter or drone 120i in fig. 1 may be configured as a mobile base station, terminal 120i being the base station for those terminals 120j that access radio access network 100 through 120 i; but for base station 110a 120i is a terminal, i.e., communication between 110a and 120i is via a wireless air interface protocol. Of course, communication between 110a and 120i may be performed via an interface protocol between base stations, and in this case, 120i is also a base station with respect to 110 a. Thus, both the base station and the terminal may be collectively referred to as a communication device, 110a and 110b in fig. 1 may be referred to as a communication device having base station functionality, and 120a-120j in fig. 1 may be referred to as a communication device having terminal functionality.

Communication can be carried out between the base station and the terminal, between the base station and between the terminal and the terminal through the authorized spectrum, communication can be carried out through the unlicensed spectrum, and communication can also be carried out through the authorized spectrum and the unlicensed spectrum at the same time; communication can be performed through a frequency spectrum of 6 gigahertz (GHz) or less, communication can be performed through a frequency spectrum of 6GHz or more, and communication can be performed using a frequency spectrum of 6GHz or less and a frequency spectrum of 6GHz or more simultaneously. The embodiment of the application does not limit the spectrum resources used by the wireless communication.

In the embodiment of the present application, the functions of the base station may be performed by a module (such as a chip) in the base station, or may be performed by a control subsystem including the functions of the base station. The control subsystem comprising the base station function can be a control center in the application scenarios of smart power grids, industrial control, intelligent transportation, smart cities and the like. The functions of the terminal may be performed by a module (e.g., a chip or a modem) in the terminal, or by a device including the functions of the terminal.

In the application, a base station sends a downlink signal or downlink information to a terminal, and the downlink information is borne on a downlink channel; the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on an uplink channel. The downlink information may include downlink control information and downlink data information, the downlink control channel is used for carrying the downlink control information, and the downlink control channel may be a physical downlink control channel (physical downlink control channel, PDCCH); the downlink data channel is used to carry downlink data information, and the downlink data channel may be a physical downlink shared channel (physical downlink shared channel, PDSCH). In order for a terminal to communicate with a base station, it is necessary to establish a radio connection with a cell controlled by the base station. The cell with which the terminal has established a radio connection is called the serving cell of the terminal. The terminal may also be interfered by signals from neighboring cells when communicating with the serving cell.

It should be understood that, in the embodiment of the present application, PDSCH, PDCCH and PUSCH are only used as examples of downlink data channels, downlink control channels and uplink data channels, respectively, and the data channels and the control channels may have different names in different systems and different scenarios, and the embodiment of the present application is not limited thereto.

In order to facilitate understanding of the technical solution provided by the embodiments of the present application, technical terms related to the embodiments of the present application are explained and illustrated below.

(1) Cell

The coverage area of each base station may be partitioned into one or more cells. In the current NR standard, one cell may be configured with one downlink carrier, and optionally may also be configured with at least one uplink carrier. For a terminal, the cell that serves it is referred to as a serving cell. The cell referred to in the present application may be a serving cell.

(2) Carrier wave

The frequency domain resources allocated to one cell may be referred to as carriers. For example, a downlink frequency domain resource allocated to one cell may be referred to as a downlink carrier, and a continuous uplink frequency domain resource allocated to one cell may be referred to as an uplink carrier.

(3) Controlling resource sets

The transmission resources involved in the downlink transmission process may be divided into a control region available for transmitting downlink control information and a data region available for transmitting downlink data information. The control area contains time domain resources and frequency domain resources which can be occupied by the downlink control channel, and the data area contains time domain resources and frequency domain resources which can be occupied by the downlink data channel. As one implementation, the location where the PDCCH exists may be determined in the control region and the location where the PDSCH exists may be determined in the data region.

A control-resource set (CORESET) is a block of time-frequency resources within a control region. Wherein, in the time domain, 1 CORESET may be configured as 1 or several consecutive orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols; in the frequency domain, 1 CORESET may be a set of contiguous or non-contiguous frequency domain resources. As one implementation, CORESET is used to indicate the time-domain, frequency-domain range within a time slot where PDCCH may exist. The relevant parameters of CORESET may be configured through radio resource control (radio resource control, RRC) signaling.

(4) Aggregation level (aggregation level, AL)

The number of control channel elements (control channel element, CCEs) used to carry 1 PDCCH is referred to as CCE aggregation level, e.g., CCE aggregation levels may be 1, 2, 4, 8, 16, etc. Since different PDCCHs can use different CCE aggregation levels, i.e., contain different numbers of REs, the aggregation levels also account for the number of physical resources occupied by the PDCCH channels. In the case of transmitting the same control information, the transmission performance is better as the number of CCEs corresponding to the PDCCH is larger.

Further explanation is made regarding CCEs. 1 CCE is composed of 6 resource groups (resource element group, REGs), and 1 REG is composed of 12 Resource Elements (REs). 1 REG corresponds to 1 resource block RB on 1 OFDM symbol, i.e., 1 REG includes resources corresponding to one symbol on the time domain and one RB on the frequency domain. The resources that the PDCCH may occupy and the resources that the PDCCH actually occupies may be described by CCEs.

For example, fig. 2 is a schematic diagram of resources occupied by a PDCCH according to an embodiment of the present application. The relationship of PDCCH, CCE and REG at aggregation level 2 is shown in fig. 2: the PDCCH is carried on 2 CCEs, each containing 6 REGs.

The base station may configure at least one aggregation level to carry PDCCHs to support efficient transmission of different downlink control information (downlink control information, DCI) formats under different channel bandwidths and channel environments. On the premise that the DCI format is certain, the higher the aggregation level is, the lower the code rate of DCI carried on the PDCCH is, the better the coding robustness is, and the DCI is suitable for the transmission of DCI under the condition of poor wireless channel environment; if the wireless channel environment of the terminal is good, transmission resources can be saved by adopting a high code rate and a low aggregation level.

(5) PDCCH candidate (candidate)

The standard protocol specifies or the base station configures the number of PDCCH candidates under each aggregation level, and the time-frequency resource location of each PDCCH candidate, that is, the time-frequency resource location where the PDCCH may occur, can be obtained according to the CCE aggregation level and the number of PDCCH candidates under each aggregation level.

Taking UE specific search space as an example, when CCE aggregation level is 1, 1 CCE is read at the starting position of the UE specific search space, the 1 CCE is a PDCCH transmitting, the UE performs rate de-matching and decoding on the read data, then uses radio network temporary identifier (radio network temporary identifier, RNTI) to descramble and CRC check the obtained data, if the CRC check is successful, the UE knows that the PDCCH is sent to itself, and further can solve the content of the DCI.

(6)DCI

The content of the transmission (bearer) on the PDCCH is called DCI. DCI may include uplink and downlink resource scheduling information, power control information, slot format information, and the like. After the terminal correctly acquires the DCI sent by the base station, the terminal can correctly decode the data sent by the base station or send uplink data to the base station.

Fig. 3 is a schematic diagram of a DCI processing flow according to an embodiment of the present application. Fig. 3 (a) shows a DCI processing flow at a base station according to an embodiment of the present application. Referring to (a) in fig. 3, the base station may add a CRC field to DCI, and may scramble the last 16 bits in the CRC field (also referred to as a masking process) using an RNTI, wherein the RNTI used for scrambling may be determined according to the purpose of the DCI or configured by the base station. The base station performs Interleaving (Interleaving) processing, channel coding, and Rate Matching (RM) on the DCI added with the CRC field, where the channel coding may be polar coding (polar coding), and the RM may include sub-block Interleaving (sub-block Interleaving) processing, bit selection (bit selection), and Interleaving processing. Finally, the base station performs scrambling and modulation on the information after rate matching to obtain a modulation symbol, maps the modulation symbol to CCE, and then can send a modulation signal to the terminal, thereby realizing DCI transmission.

Fig. 3 (b) shows a DCI processing flow at the terminal side provided for an embodiment of the present application. Referring to (b) of fig. 3, the terminal demodulates and descrambles the modulated signal after demapping the modulated signal from the CCE. The terminal performs rate de-matching (rate de-mapping), channel decoding, de-interleaving and de-masking on the information obtained after the descrambling process; the channel decoding may be polar decoding. After the terminal performs CRC check on the information obtained by the de-masking processing, deleting a CRC field in the information obtained by the de-masking processing to obtain DCI.

(7) Plural means two or more; at least one, meaning one or more.

In addition, it should be understood that in the description of the present application, the words "first," "second," and the like are used merely for distinguishing between the descriptions and not for indicating or implying any relative importance or order.

From the foregoing, it is clear that DCI may be used to schedule downlink data transmission, but the length of DCI needs to be smaller than the set length due to the coding limitations of the current encoder. The maximum length of DCI is 164bits as defined in the existing protocol, which also contains a 24bits CRC field. As the communication standard evolves, the corresponding control field may need to be added to the DCI while the communication function is added, and the length of the DCI will increase. For example, in a communication scenario provided by the embodiment of the present application, DCI on one carrier may schedule downlink transmission of multiple carriers at the same time, and this technology may be referred to as single-DCI technology. In this communication scenario, one DCI needs to contain control information of a plurality of cells, and thus the length of the DCI increases. But there is currently no transmission scheme for DCI exceeding a set length.

Based on the above-mentioned problems, the present application provides a control information transmission method for providing a flexible DCI transmission scheme. Fig. 4 is an exemplary flowchart of a control information transmission method according to an embodiment of the present application. The method may be performed by a terminal and a radio access network device in the communication system shown in fig. 1, and for convenience of description, the following embodiments will take a base station as an example of the radio access network device. Referring to fig. 4, the method includes the steps of:

s401: and the base station performs segmentation processing on the DCI according to the segmentation number M of the DCI to obtain M second subsequences.

In the embodiment of the present application, the base station may segment the DCI to divide the DCI into M second sub-sequences. Wherein M is the number of segments for the base station to segment the DCI, and M is an integer greater than 1. And the base station segments the DCI to obtain M second subsequences, wherein each of the M second subsequences comprises a part of data in the DCI. The second sub-sequence herein may also be referred to as a Code Block (CB).

When the base station performs segmentation processing on the DCI, the base station may first determine the segmentation number M of the DCI. The number of segments M of the DCI may be related to a CCE aggregation level and a length of the DCI, or the number of segments M of the DCI may be related to a CCE aggregation level. In practice, the base station may determine the segmentation number M of the DCI according to any one of the following ways:

Mode one: and the base station determines the segmentation number M of the DCI according to the CCE aggregation level, the length of the DCI and the first corresponding relation.

The first correspondence is a correspondence among a length of DCI, CCE aggregation level, and a segmentation number. Table 1 is an example of a first correspondence provided in an embodiment of the present application.

Table 1 first example of correspondence

Wherein NS in table 1 indicates no support.

Referring to table 1, the base station may determine the segmentation number M of the DCI according to the length of the DCI, the CCE aggregation level, and the first correspondence. For example, when al=4 and the DCI length is 550, the base station may determine the number of segments m=4 of the DCI according to the first correspondence shown in table 1; for another example, when al=8 and the DCI length is 260, the base station may determine the number of segments m=2 of the DCI according to the first correspondence shown in table 1.

In this way, after the base station performs segmentation processing on the DCI according to the determined segmentation number M of the DCI, the length of each second sub-sequence may be made smaller than or equal to the maximum length of the DCI defined in the current protocol, so that when the base station performs operations such as coding processing on the segmented M second sub-sequences respectively, the base station may multiplex the existing DCI processing flow as much as possible (as shown in (a) of fig. 3), so that the control information transmission method provided by the embodiment of the present application may be implemented by modifying software on the premise of multiplexing existing hardware, thereby not increasing complexity of coding processing and guaranteeing coding performance.

Mode two: and the base station determines the segmentation number M of the DCI according to the CCE aggregation level and the second corresponding relation.

The second corresponding relation is a relation between the CCE aggregation level and the segmentation number. Table 2 is an example of a second correspondence provided in an embodiment of the present application.

Table 2 second example of correspondence

Aggregation level	AL＝1	AL＝2	AL＝4	AL＝8	AL＝16
						Number of segments	1	2	4	8	16

Referring to table 2, the base station may determine the segmentation number M of DCI according to the CCE aggregation level and the second correspondence. For example, when al=4, the base station may determine the number of segments m=4 of the DCI according to the second correspondence shown in table 2; for another example, when al=8, the base station may determine the number of segments m=8 of the DCI according to the second correspondence shown in table 2.

In the embodiment of the application, the base station can send the RRC signaling to the terminal, wherein the RRC signaling indicates the first corresponding relation or the second corresponding relation; or the first correspondence or the second correspondence may be predefined for the protocol.

In another embodiment of the present application, the base station may further send RRC signaling to the terminal after determining the number of segments M of the DCI, where the RRC signaling indicates the number of segments M.

It should be noted that, the first correspondence relationship shown in table 1 and the second correspondence relationship shown in table 2 are only examples provided in the embodiments of the present application, and the value of M in the first correspondence relationship or the second correspondence relationship may be one value of at least one candidate value. In determining the candidate value of M, the candidate value of M may be determined according to CCE aggregation levels supported by the current protocol. Specifically, taking the CCE aggregation level {1,2,4,8,16} supported by the current protocol as an example, we call {1,2,4,8,16} set a. If the current CCE aggregation level is AL, the value of AL/M may be a subset of set a, the subset including the value of the current CCE aggregation level in set a and the value less than the current CCE aggregation level. It can be understood that the value of AL/M is N in the embodiment of the present application, where N is the number of CCEs mapped with modulation symbols corresponding to each second subsequence (see, for details, S405, which will not be described in detail herein). By the design, N is a numerical value in CCE aggregation levels supported by the current protocol, so that a processing mode and a device for mapping the modulation symbol corresponding to each second sub-sequence to N CCEs can multiplex the mode and the device for mapping the modulation signal corresponding to the existing DCI to the CCEs, and the control information transmission mode provided by the application is easier to implement.

It will be appreciated that M and N are each a subset of set A, the subset comprising the values of the current CCE aggregation level in set A and the values less than the current CCE aggregation level. For example, when the current CCE aggregation level is 4, the candidate set of N may be {1,2,4}, and the candidate set of M may be {1,2,4}; for another example, when the current CCE aggregation level is 16, the candidate set of N may be {1,2,4,8,16}, and the candidate set of M may be {1,2,4,8,16}. It can be appreciated that, since M is the number of segments for the base station to segment the DCI, when m=1, it means that the base station does not need to segment the DCI, so the candidate set of M may not include the value 1.

In the embodiment of the present application, after determining the segmentation number M of DCI, the base station may determine the length of each of the M second sub-sequences according to the length of DCI and the segmentation number M of DCI. The base station may segment the DCI according to the length of each second sub-sequence to obtain M second sub-sequences.

In the embodiment of the application, the lengths of the M second subsequences can be the same; or the lengths of the first M-1 second subsequences in the M second subsequences are the same; or the length of the last M-1 second subsequences in the M second subsequences is the same. The method of the segmentation process for the base station in different situations is further described below.

1. The M second subsequences are the same length.

When the lengths of the M second sub-sequences are the same, the length of each second sub-sequence and the length of the DCI satisfy the following formula:

wherein T is ₁ For the length of each second sub-sequence, S is the length of DCI,is a round-up operation.

If the DCI is segmented based on the number of segments M, the DCI cannot be equally divided into M second sub-sequences with the same length, the base station may add a padding field to the DCI, and segment the DCI after the padding field. For example, the base station may make up 0 or 1 in the high order of the bit sequence of the DCI or make up 0 or 1 in the low order of the bit sequence of the DCI, so that the DCI after adding the padding field may be equally divided into M second sub-sequences with the same length. For example, the length of DCI after filling a field may satisfy the following formula:

wherein S is ^‘ Is the DCI length after filling the field.

For example, assume that the DCI length is 990 and the number of segments M is 8. The base station may determine that the length of each second sub-sequence is 124, and the base station may add a padding field including two bits having a value of 0 at the upper bits of the bit sequence of the DCI. The base station may divide the DCI added with the padding field into 8 second sub-sequences, each having a length of 124.

2. The first M-1 second subsequences of the M second subsequences are the same length.

When the lengths of the first M-1 second sub-sequences in the M second sub-sequences are the same, the base station may determine the lengths of the first M-1 second sub-sequences in the M sub-sequences according to the length of the DCI and the number of segments M. For example, the length of the first M-1 second subsequences satisfies the following formula:

wherein T is ₂ For the length of the first M-1 second sub-sequences, S is the length of the DCI,is a round-up operation.

The base station may also determine a length of an mth second sub-sequence of the M sub-sequences. For example, the length of the mth second subsequence satisfies the following formula:

wherein T is ₃ Is the length of the mth second subsequence.

The base station may segment the DCI according to the determined lengths of the first M-1 second subsequences and the length of the mth second subsequence in the M second subsequences, to obtain M second subsequences.

For example, assume that the DCI length is 990 and the number of segments M is 8. The base station may determine that the first 7 second sub-sequences have a length of 124 and the 8 th second sub-sequence has a length of 122.

3. The length of the latter M-1 second subsequences is the same among the M second subsequences.

When the lengths of the last M-1 second sub-sequences in the M second sub-sequences are the same, the base station may determine the lengths of the last M-1 second sub-sequences in the M sub-sequences according to the length of the DCI and the number of segments M. For example, the length of the latter M-1 second subsequences satisfies the following formula:

Wherein T is ₄ For the length of the latter M-1 second sub-sequences, S is the length of the DCI,is a round-up operation.

The base station may also determine the length of the 1 st second sub-sequence of the M sub-sequences. For example, the length of the 1 st second subsequence satisfies the following formula:

wherein T is ₅ Is the length of the mth second subsequence.

The base station may segment the DCI according to the determined length of the first second subsequence of the M second subsequences and the length of the M-1 second subsequences, to obtain M second subsequences.

For example, assume that the DCI length is 990 and the number of segments M is 8. The base station may determine that the 1 st second sub-sequence has a length of 122 and the last 7 second sub-sequences have a length of 124.

S402: and the base station respectively carries out coding processing on each second subsequence in the M second subsequences to obtain M first subsequences.

The encoding process performed by the base station for each second sub-sequence may include: adding CRC field, interleaving, channel coding, rate matching. The channel coding may be polarization coding, and the rate matching may include block interleaving, bit selection, and bit interleaving.

The base station may also scramble the last 16 bits in the CRC field with the RNTI as the CRC field is added to each second sub-sequence.

It should be noted that, by introducing the segmentation processing to the DCI by the base station in S401, the lengths of the M second sub-sequences obtained after the segmentation processing to the DCI by the base station may be the same, and then the base station may perform channel coding on the M second sub-sequences based on the same coding parameters, so as to improve coding efficiency. When the base station processes the DCI segment, the code rate after the coding of the M-th second sub-sequence is smaller than that of the M-1 th second sub-sequence when the lengths of the M-1 th second sub-sequences are the same, so that the decoding success rate of the M-th second sub-sequence can be improved. When the lengths of the M-1 second sub-sequences are the same, the code rate after the 1 st second sub-sequence is coded is smaller than that of the M-1 second sub-sequences, so that the decoding success rate of the 1 st second sub-sequence can be improved.

S403: and the base station performs cascading operation on the M first subsequences to obtain a second sequence.

The base station may perform cascade operation on the M first sub-sequences according to the sequence of the second sub-sequence corresponding to each first sub-sequence, to obtain the second sequence.

S404: the base station may modulate the second sequence to generate the first sequence.

The base station may also scramble the second sequence before modulating the second sequence.

S405: the base station transmits a first sequence to the terminal.

In the embodiment of the present application, a first sequence sent by a base station to a terminal is carried on m×n CCEs, where m×n is a CCE aggregation level, and N is a positive integer. That is, in the embodiment of the present application, the PDCCH is carried on m×n CCEs, and the base station may send the first sequence to the terminal through the m×n CCEs.

As can be seen from S403 to S404, the first sequence is obtained by modulating the second sequence by the base station, and the second sequence is obtained by performing a concatenation operation on the M first sub-sequences by the base station, where the first sequence includes modulation symbols corresponding to the M first sub-sequences. The modulation symbol corresponding to any one of the first sub-sequences is obtained by modulating a part corresponding to the first sub-sequence in the second sequence by the base station.

The modulation symbols corresponding to each first sub-sequence in the first sequence are mapped to N CCEs of M x N CCEs, and the modulation symbols corresponding to different first sub-sequences are mapped to N different CCEs.

Fig. 5 is an exemplary diagram of a mapping relationship between a first sub-sequence and CCEs according to an embodiment of the present application. Referring to fig. 5, it is assumed that the first sequence includes modulation symbols corresponding to 4 first sub-sequences, which are CBs, respectively ^* 0～CB ^* 3, a step of; the CCE aggregation level is 8, and the 8 CCEs are CCE0 to CCE7, respectively. The modulation symbols corresponding to each first sub-sequence are mapped onto 2 CCEs and the modulation symbols corresponding to the different first sub-sequences are mapped onto 2 different CCEs. Such as CB ^* Modulation symbols corresponding to 0 are mapped to CCE0 and CCE1, CB ^* 1 onto CCE2 and CCE3, CB ^* 2 on CCE4 and CCE5, CB ^* The modulation symbols corresponding to 3 are mapped onto CCE6 and CCE7.

Through the above mode, the base station can split the longer DCI into a plurality of sub-sequences to be respectively processed, and map the modulation symbols corresponding to the plurality of sub-sequences onto a plurality of CCEs, and the longest length of the DCI capable of supporting transmission can be increased through the scheme, so that the transmission of the DCI is flexibly realized, and the problem that the existing DCI which exceeds the set length cannot be transmitted is solved.

S406: the terminal may demodulate the first sequence to generate a second sequence.

After demodulating the first sequence, the terminal may also perform descrambling on the demodulated first sequence.

S407: and the terminal processes the second sequence to obtain M first subsequences.

The terminal may determine the number of segments M of the second sequence according to any of the following ways:

In the first mode, the terminal determines the segmentation number M of the DCI according to the CCE aggregation level, the length of the DCI and the first corresponding relation.

The first correspondence may be a correspondence between a length of DCI, a CCE aggregation level, and a segmentation number. For example, the first correspondence may be as shown in table 1.

And secondly, the terminal determines the segmentation number M of the DCI according to the CCE aggregation level and the second corresponding relation.

Wherein the second correspondence may be a relationship between CCE aggregation level and number of segments. For example, the second correspondence may be as shown in table 2.

It should be noted that, the first corresponding relationship or the second corresponding relationship may be predefined by a protocol; or the terminal may receive RRC signaling sent by the base station, where the RRC signaling indicates the first correspondence or the second correspondence. The method for determining the number of segments M of the second sequence by the terminal according to the first or second mode may be implemented by referring to the method for determining the number of segments M of the DCI by the base station in S401, and the repetition is not repeated.

And thirdly, the terminal receives the RRC signaling sent by the base station, wherein the RRC signaling indicates the segmentation number M.

The RRC signaling sent by the base station to the terminal may include a field indicating the number of segments M, and after receiving the RRC signaling sent by the base station, the terminal may determine the number of segments M according to the RRC signaling.

In the embodiment of the present application, after determining the number M of segments of the second sequence, the terminal may process the second sequence according to the mapping relationship between M first sub-sequences and m×n CCEs in the second sequence to obtain M first sub-sequences.

For example, when M first subsequences are combined with M x NWhen the mapping relationship between CCEs is shown in fig. 5, CB ^* The modulation symbol corresponding to 0 is mapped to CCE0 and CCE1, and then the terminal may use a portion of the second sequence corresponding to the modulation symbols carried on CCE0 and CCE1 as a first sub-sequence; CB (CB) ^* The modulation symbols corresponding to 1 are mapped to CCE2 and CCE3, and then the terminal can take the part corresponding to the modulation symbols carried on CCE2 and CCE3 in the second sequence as a second first sub-sequence; similarly, the terminal may process the second sequence to obtain 4 first subsequences.

S408: and the terminal carries out decoding processing on the M first subsequences to obtain M second subsequences.

The decoding process may include at least one of de-rate matching, channel decoding, de-interleaving, CRC checking. The channel decoding may be polar decoding.

S409: the terminal judges whether each second subsequence in the M second subsequences passes the verification; if each of the M second subsequences passes the check, performing S410; if at least one of the M second sub-sequences is not verified, S411 is performed.

In an alternative implementation manner, when the terminal performs CRC check on each second sub-sequence, the terminal may determine whether the second sub-sequence is checked to pass, and if the terminal checks the second sub-sequence successfully, it indicates that the decoding of the second sub-sequence is successful; if the terminal does not pass the check on any one of the M second sub-sequences, the terminal may stop the decoding process on the first sub-sequence corresponding to the second sub-sequence which is not checked among the M second sub-sequences.

Optionally, the terminal deletes the CRC field in any second sub-sequence after checking any second sub-sequence. In the present application, the second subsequence with and without CRC field is simply referred to as the second subsequence.

S410: and the terminal generates DCI according to the M second subsequences.

When the terminal checks the M second sub-sequences successfully, the terminal may perform cascade operation on the M second sub-sequences according to the sequence that the modulation symbols corresponding to the M second sub-sequences are mapped to the m×n CCEs, so as to generate DCI.

Fig. 6 is a schematic diagram of mapping relationships between a first sub-sequence, a second sub-sequence and CCEs according to an embodiment of the present application. Fig. 6 illustrates that the number of segments M is 2 and cce aggregation level is 4. Referring to fig. 6,2 first subsequences are CB ^* 0 and CB ^* 1, two second subsequences are CB0 and CB1, and 4 CCEs are CCE 0-CCE 3.CB (CB) ^* Modulation symbols corresponding to 0 are mapped on CCE0 and CCE1, CB ^* The modulation symbols corresponding to 1 are mapped on CCE2 and CCE3, and CB0 is terminal-to-CB ^* 0, and CB1 is the terminal pair CB ^* 1, performing decoding processing. Therefore, the modulation symbol corresponding to CB0 is mapped on CCE0 and CCE1, and the modulation symbol corresponding to CB1 is mapped on CCE2 and CCE3.

According to the order in which modulation symbols corresponding to the 2 second sub-sequences shown in fig. 6 are mapped to 4 CCEs, the terminal may perform concatenation operation on the 2 second sub-sequences in the order of CB0 and CB1 to generate DCI.

In an alternative embodiment, after performing the concatenation operation on the M second sub-sequences, if a padding field exists in the M second sub-sequences after the concatenation operation, the terminal deletes the padding field, and generates DCI.

S411: the terminal stops decoding the first subsequence corresponding to the second subsequence which is not verified in the M second subsequences; or the terminal determines the control information according to at least one second subsequence passing the verification in the M second subsequences.

In an alternative embodiment, when the terminal fails to check any one of the M second sub-sequences, the terminal may stop decoding the first sub-sequence corresponding to the second sub-sequence that is not checked from among the M second sub-sequences, and the decoding process ends.

Optionally, the terminal may stop the decoding process when it is determined that the M second sub-sequences are not transmitted to itself by the base station when the first one of the M second sub-sequences fails to be checked.

In another alternative embodiment, the terminal may determine the control information according to at least one second sub-sequence passing the verification among the M second sub-sequences. Optionally, since the M second sub-sequences are obtained by the base station performing the segmentation processing on the DCI, each second sub-sequence includes a part of fields of the DCI, the terminal may perform parsing processing according to at least one second sub-sequence that passes the verification, so as to obtain control information indicated by at least one second sub-sequence that passes the verification. For example, when the DCI is used to indicate scheduling information corresponding to a plurality of carriers, if the terminal checks at least one second sub-sequence of the M second sub-sequences, and parses the at least one second sub-sequence to obtain scheduling information corresponding to at least one carrier of the plurality of carriers, the terminal may perform receiving processing on a data channel transmitted on the at least one carrier according to the parsed scheduling information corresponding to the at least one carrier.

Optionally, when determining the control information according to at least one second subsequence passing through the verification in the M second subsequences, the terminal may add a padding field at a position of the second subsequence passing through the verification according to an order of the M second subsequences, or the terminal may reserve the second subsequence passing through the verification, so that when resolving to obtain the control information, the terminal may still resolve according to a position of each field in the DCI, and extract an available field to obtain the control information, without determining a position of each field again. Wherein, each field in the DCI may be used to indicate different information, e.g., different fields may indicate scheduling information corresponding to different carriers; the location of each field in the DCI may be predefined for the base station to configure or protocol to the terminal; the available field refers to a field parsed from the second subsequence that passes the check. Or, the terminal may redetermine the position of each field in the DCI according to the identifier corresponding to the at least one second subsequence that passes the verification, and then parse the at least one second subsequence according to the redetermined position of each field in the DCI, and extract the available field to obtain the control information.

It will be appreciated that, in order to implement the functions in the above embodiments, the base station and the terminal include corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application scenario and design constraints imposed on the solution.

Fig. 7 and 8 are schematic structural diagrams of possible communication devices according to an embodiment of the present application. These communication devices may be used to implement the functions of the terminal or the base station in the above method embodiments, so that the beneficial effects of the above method embodiments may also be implemented. In the embodiment of the present application, the communication device may be one of the terminals 120a to 120j shown in fig. 1, or may be the base station 110a or 110b shown in fig. 1, or may be a module (e.g., a chip) applied to the terminal or the base station.

As shown in fig. 7, the communication apparatus 700 includes a processing unit 710 and a transceiving unit 720. The communication device 700 is configured to implement the functions of the base station or the terminal in the method embodiment shown in fig. 4.

When the communication apparatus 700 is configured to implement the function of the terminal in the method embodiment shown in fig. 4, the transceiver unit 720 is configured to receive a first sequence from the radio access network device, where the first sequence is carried on m×n CCEs. Wherein M is an integer greater than 1, and N is a positive integer. The processing unit 710 is configured to demodulate the first sequence to generate a second sequence, and then process the second sequence to obtain M first subsequences. And the terminal carries out decoding processing on the M first subsequences to obtain M second subsequences. And if the terminal passes the verification of each second subsequence in the M second subsequences, the terminal generates DCI according to the M second subsequences.

In an optional implementation manner, the processing unit 710 is specifically configured to process the second sequence according to a mapping relationship between M first sub-sequences in the second sequence and the m×n CCEs, so as to obtain the M first sub-sequences; wherein, the modulation symbol corresponding to each first sub-sequence in the M first sub-sequences is mapped to N CCEs in the m×n CCEs, and the modulation symbol corresponding to a different first sub-sequence is mapped to N different CCEs.

In an optional implementation manner, the processing unit 710 is specifically configured to perform a concatenation operation on the M second sub-sequences according to an order in which modulation symbols corresponding to the M second sub-sequences are mapped to the m×n CCEs, so as to generate the DCI.

In an alternative implementation, the processing unit 710 is further configured to delete the padding field after performing the concatenation operation on the M second subsequences.

In an optional implementation manner, the processing unit 710 is further configured to determine a segmentation number M of the second sequence according to the CCE aggregation level, the length of the DCI, and a first correspondence, where the first correspondence is a correspondence between the length of the DCI, the CCE aggregation level, and the segmentation number M; or the terminal determines the segmentation number M of the second sequence according to the CCE aggregation level and a second corresponding relation, wherein the second corresponding relation is the corresponding relation between the CCE aggregation level and the segmentation number M.

In an alternative implementation manner, the transceiver unit 720 is further configured to receive a first RRC signaling from the radio access network device, where the first RRC signaling indicates the first correspondence or the second correspondence.

In an alternative implementation, the transceiver unit 720 is further configured to receive a second RRC signaling from the radio access network device; the second RRC signaling indicates the number of segments M.

In an alternative implementation, the processing unit 710 is further configured to: if the verification of any one of the M second sub-sequences is not passed, stopping the decoding processing of the first sub-sequence corresponding to the second sub-sequence which is not verified in the M second sub-sequences; or if the verification of any one of the M second sub-sequences is not passed, determining control information according to at least one second sub-sequence which is verified to be passed in the M second sub-sequences.

In an alternative implementation manner, the processing unit 710 is specifically configured to, after demodulating the first sequence, perform a descrambling process on the demodulated first sequence to generate the second sequence.

When the communication apparatus 700 is configured to implement the function of the base station in the method embodiment shown in fig. 4, the processing unit 710 is configured to perform segmentation processing on the DCI according to the segmentation number M of the downlink control information DCI, so as to obtain M second subsequences, where M is an integer greater than 1. And respectively carrying out coding treatment on each second subsequence in the M second subsequences to obtain M first subsequences, carrying out cascading operation on the M first subsequences to obtain second sequences, and modulating the second sequences to generate first sequences. The transceiver 720 is configured to send the first sequence to a terminal, where the first sequence is carried on m×n control channel elements CCEs, where m×n is a CCE aggregation level, and N is a positive integer.

In an alternative implementation, the processing unit 710 is specifically configured to determine a length of each of the M second sub-sequences according to a length of the DCI and the number of segments of the DCI. And carrying out segmentation processing on the downlink control information according to the length of each second subsequence to obtain M second subsequences.

In an alternative implementation, the processing unit 710 is further configured to add a padding field to the DCI so that the lengths of the M second sub-sequences are the same.

In an optional implementation manner, the processing unit 710 is further configured to determine a segmentation number M of the DCI according to the CCE aggregation level, the length of the DCI, and a first correspondence, where the first correspondence is a correspondence between the length of the DCI, the CCE aggregation level, and the segmentation number M; or determining the segmentation number M of the DCI according to the CCE aggregation level and a second corresponding relation, wherein the second corresponding relation is the corresponding relation between the CCE aggregation level and the segmentation number M.

In an optional implementation manner, the transceiver unit 720 is further configured to send a first RRC signaling to the terminal, where the first RRC signaling indicates the first correspondence or the second correspondence.

In an alternative implementation, the transceiver unit 720 is further configured to send a second RRC signaling to the terminal; the second RRC signaling indicates the number of segments M.

In an alternative implementation, the processing unit 710 is further configured to scramble the second sequence before modulating the second sequence.

For a more detailed description of the processing unit 710 and the transceiver unit 720, reference is made to the relevant description of the embodiment of the method shown in fig. 4.

As shown in fig. 8, the communication device 800 includes a processor 810 and an interface circuit 820. Processor 810 and interface circuit 820 are coupled to each other. It is understood that the interface circuit 820 may be a transceiver or an input-output interface. Optionally, the communication device 800 may further comprise a memory 830 for storing instructions to be executed by the processor 810 or for storing input data required by the processor 810 to execute instructions or for storing data generated after the processor 810 executes instructions.

When the communication device 800 is used to implement the method shown in fig. 4, the processor 810 is used to implement the functions of the processing unit 710, and the interface circuit 820 is used to implement the functions of the transceiver unit 720.

When the communication device is a chip applied to the terminal, the terminal chip realizes the functions of the terminal in the embodiment of the method. The terminal chip receives information from other modules (such as a radio frequency module or an antenna) in the terminal, and the information is sent to the terminal by the base station; alternatively, the terminal chip sends information to other modules in the terminal (e.g., radio frequency modules or antennas) that the terminal sends to the base station.

When the communication device is a module applied to a base station, the base station module realizes the functions of the base station in the method embodiment. The base station module receives information from other modules (such as radio frequency modules or antennas) in the base station, the information being transmitted by the terminal to the base station; alternatively, the base station module transmits information to other modules in the base station (e.g., radio frequency modules or antennas) that the base station transmits to the terminal. The base station module may be a baseband chip of a base station, or may be a DU or other module, where the DU may be a DU under an open radio access network (open radio access network, O-RAN) architecture.

It is to be appreciated that the processor in embodiments of the application may be a central processing unit (Central Processing Unit, CPU), other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, transistor logic device, hardware components, or any combination thereof. The general purpose processor may be a microprocessor, but in the alternative, it may be any conventional processor.

The method steps of the embodiments of the present application may be implemented in hardware or in software instructions executable by a processor. The software instructions may be comprised of corresponding software modules that may be stored in random access memory, flash memory, read only memory, programmable read only memory, erasable programmable read only memory, electrically erasable programmable read only memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. The storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a base station or terminal. The processor and the storage medium may reside as discrete components in a base station or terminal.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, e.g., floppy disk, hard disk, tape; but also optical media such as digital video discs; but also semiconductor media such as solid state disks. The computer readable storage medium may be volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage medium.

In various embodiments of the application, where no special description or logic conflict exists, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments based on their inherent logic.

Claims

1. A control information transmission method performed by a terminal or a module applied to the terminal, comprising:

receiving a first sequence from radio access network equipment, wherein the first sequence is borne on M x N control channel units (CCEs), M x N is a CCE aggregation level, M is an integer greater than 1, and N is a positive integer;

demodulating the first sequence to generate a second sequence;

processing the second sequence to obtain M first subsequences;

decoding the M first subsequences to obtain M second subsequences;

and if each second subsequence in the M second subsequences passes the verification, generating downlink control information DCI according to the M second subsequences.

2. The method of claim 1, wherein processing the second sequence to obtain M first subsequences comprises:

Processing the second sequence according to the mapping relation between M first subsequences in the second sequence and the M x N CCEs to obtain the M first subsequences; wherein, the modulation symbol corresponding to each first sub-sequence in the M first sub-sequences is mapped to N CCEs in the m×n CCEs, and the modulation symbol corresponding to a different first sub-sequence is mapped to N different CCEs.

3. The method according to claim 1 or 2, wherein the generating downlink control information according to the M second sub-sequences comprises:

and performing cascading operation on the M second sub-sequences according to the sequence of mapping the modulation symbols corresponding to the M second sub-sequences to the M x N CCEs, and generating the DCI.

4. The method of claim 3, wherein after concatenating the M second subsequences, the method further comprises:

the padding field is deleted.

5. The method of any one of claims 1-4, wherein the method further comprises:

determining the segmentation number M of the second sequence according to the CCE aggregation level, the length of the DCI and a first corresponding relation, wherein the first corresponding relation is the corresponding relation among the length of the DCI, the CCE aggregation level and the segmentation number M; or alternatively

And determining the segmentation number M of the second sequence according to the CCE aggregation level and a second corresponding relation, wherein the second corresponding relation is the corresponding relation between the CCE aggregation level and the segmentation number M.

6. The method of claim 5, wherein the first correspondence or the second correspondence is predefined for a protocol; or alternatively

The method further comprises the steps of:

and receiving a first Radio Resource Control (RRC) signaling from the radio access network device, wherein the first RRC signaling indicates the first corresponding relation or the second corresponding relation.

7. The method of any one of claims 1-4, wherein the method further comprises:

a second RRC signaling is received from the radio access network device, the second RRC signaling indicating the number of segments M.

8. The method of any one of claims 1-7, wherein the method further comprises:

if the verification of any one of the M second sub-sequences is not passed, stopping the decoding processing of the first sub-sequence corresponding to the second sub-sequence which is not verified in the M second sub-sequences; or alternatively

And if the verification of any one of the M second sub-sequences is not passed, determining control information according to at least one second sub-sequence which is passed by the verification in the M second sub-sequences.

9. A control information transmission method performed by a radio access network device or a module applied to the radio access network device, the method comprising:

segmenting the DCI according to the segmentation number M of the downlink control information DCI to obtain M second subsequences, wherein M is an integer greater than 1;

respectively carrying out coding treatment on each second subsequence in the M second subsequences to obtain M first subsequences;

performing cascading operation on the M first subsequences to obtain a second sequence;

modulating the second sequence to generate a first sequence;

and transmitting the first sequence to a terminal, wherein the first sequence is borne on M x N Control Channel Elements (CCEs), M x N is a CCE aggregation level, and N is a positive integer.

10. The method of claim 9, wherein modulation symbols corresponding to each of the M first sub-sequences are mapped onto N CCEs of the M x N CCEs, and wherein modulation symbols corresponding to different first sub-sequences are mapped onto N different CCEs.

11. The method of claim 9 or 10, wherein,

the lengths of the M second subsequences are the same; or alternatively

The lengths of the first M-1 second subsequences in the M second subsequences are the same; or alternatively

The length of the last M-1 second subsequences in the M second subsequences is the same.

12. The method of any one of claims 9-11, wherein the method further comprises:

determining the segmentation number M of the DCI according to the CCE aggregation level, the length of the DCI and a first corresponding relation, wherein the first corresponding relation is the corresponding relation among the length of the DCI, the CCE aggregation level and the segmentation number M; or alternatively

Determining the segmentation number M of the DCI according to the CCE aggregation level and a second corresponding relation, wherein the second corresponding relation is the corresponding relation between the CCE aggregation level and the segmentation number M.

13. The method of claim 12, wherein the first correspondence or the second correspondence is predefined for a protocol; or alternatively

The method further comprises the steps of:

and sending a first Radio Resource Control (RRC) signaling to the terminal, wherein the first RRC signaling indicates the first corresponding relation or the second corresponding relation.

14. The method of any one of claims 9-12, wherein the method further comprises:

and sending a second RRC signaling to the terminal, wherein the second RRC signaling indicates the segmentation number M.

15. A communication device comprising means for performing the method of any of claims 1 to 8; or comprises means for performing the method of any one of claims 9 to 14.

16. A computer readable storage medium, characterized in that the storage medium has stored therein a computer program or instructions which, when executed by a communication device, implement the method of any of claims 1 to 8; or to implement the method of any one of claims 9 to 14.