Downlink control information fields combination
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- ZTE CORP
- Filing Date
- 2023-09-22
- Publication Date
- 2026-07-08
AI Technical Summary
Existing 4G and 5G communication systems lack flexibility in updating DCI fields for different formats, which restricts network optimization and adaptation to varying requirements.
The proposed solution involves configuring and indicating different field combinations for Downlink Control Information (DCI) formats, allowing for flexible adjustments in DCI fields and their order, as well as bit sizes, to optimize network performance.
This approach enhances the flexibility and efficiency of DCI communication, improving overall network usage and enabling better optimization based on specific network needs.
Smart Images

Figure CN2023120863_27032025_PF_FP_ABST
Abstract
Description
DOWNLINK CONTROL INFORMATION FIELDS COMBINATIONTECHNICAL FIELD
[0001] This disclosure generally relates to handling transmissions in a wireless cellular access network and is specifically directed to mechanisms for providing different field combinations for Downlink Control Information (DCI) .BACKGROUND
[0002] The Physical Downlink Control Channel (PDCCH) can be used to schedule downlink (DL) transmissions on the Physical Downlink Shared Channel (PDSCH) and uplink (UL) transmissions on the Physical Uplink Shared Channel (PUSCH) , where the Downlink Control Information (DCI) on PDCCH includes at least the downlink assignments and uplink scheduling grants. A User Equipment (UE) monitors a set of PDCCH candidates in configured monitoring occasions in one or more configured COntrol REsource SETs (CORESETs) according to the corresponding search space configurations.
[0003] In the existing 4G and 5G communication systems, quite a few different DCI formats are defined in the specification, e.g., DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 1_3, DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 0_3, and etc. However, the DCI fields for each DCI format are specified in the specification, and cannot be updated in a flexible manner according to network requirements.SUMMARY
[0004] This disclosure generally relates to handling transmissions in a wireless cellular access network and is specifically directed to mechanisms for providing different field combinations for Downlink Control Information (DCI) . The present disclosure provides mechanisms and solutions for providing flexible DCI field combinations that are suited for each DCI format in accordance with the varying needs or particular optimizations for each network. The disclosed methods improve flexibility in DCI communication, thereby improving overall usage efficiency of the network.
[0005] In some exemplary implementations, a method performed by a wireless access network node includes configuring or indicating at least one DCI field combination for at least one DCI format to a wireless terminal device, wherein the at least one DCI field combination comprises a plurality of DCI fields. The method may also include the wireless access network node configuring or indicating an order of the plurality of DCI fields of the at least one DCI field combination. The method may also include the wireless access network node transmitting to the wireless terminal device, Downlink Control Information according to the configured at least one DCI field combination. The method may also include the wireless access network node 102 indicating a bit size for the plurality of DCI fields.
[0006] Similarly, a method performed by a wireless terminal device may include receiving a configuration or an indication of at least one set of DCI field combination for at least one DCI format from a wireless access network node, wherein the at least one set of DCI field combination comprises a plurality of DCI fields. The method may include receiving a configuration or indication of an order of the plurality of DCI fields of the at least one DCI field combination, and / or deriving Downlink Control Information carried by each of the DCI fields according to the configured at least one DCI field combination, and / or deriving Downlink Control Information carried by each of the DCI fields according to the configured order of the plurality of DCI fields of the at least one DCI field combination. The method may include the wireless terminal device receiving a bit size for the plurality of DCI fields.
[0007] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the method may include the wireless access network node configuring or indicating the at least one DCI field combination to include at least one DCI field module, and / or configuring or indicating the at least one DCI field combination to include a plurality of DCI field modules and an order amongst the plurality of DCI field modules, and / or configuring or indicating which DCI fields are contained in each DCI field module. The method may also include the wireless access network node configuring or indicating an order of the DCI fields contained in each DCI field module, and / or configuring or indicating the at least one DCI field module to include at least one DCI field, and / or transmitting, by the wireless access network node to the wireless terminal device, Downlink Control Information carried by each DCI field according to the configured DCI fields of the at least one DCI field module of the at least one DCI field combination within a candidate Physical Downlink Control Channel (PDCCH) . The method may include indicating a bit size for each one of the at least one DCI field modules.
[0008] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the method may include the wireless terminal device receiving a configuration or indication of the at least one DCI field combination to include at least one DCI field module, and / or receiving a configuration or indication of the at least one DCI field combination to include a plurality of DCI field modules and an order amongst the plurality of DCI field modules, and / or receiving a configuration or indication of which DCI fields are contained in each DCI field module. The method may also include the wireless terminal device receiving a configuration or indication of an order of the DCI fields contained in each DCI field module, and / or receiving a configuration or indication of the at least one DCI field module to include at least one DCI field, and / or monitoring PDCCH candidates to detect the DCI format and derive information carried by each DCI field according to the configured DCI fields of the at least one DCI field module of the at least one DCI field combination. The method may include the wireless terminal device receiving a configuration or indication of a bit size for each one of the at least one DCI field modules.
[0009] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the method may include the wireless access network node configuring or indicating candidate values for the DCI fields for the at least one DCI field module, and / or configuring or indicating a plurality of indexes, where each index corresponds to one candidate value for each DCI field for the DCI field module, and / or indicating an index of the plurality of indexes for the DCI field module. In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein the method may include the wireless terminal device 104 receiving a configuration or indication of candidate values for the DCI fields for the at least one DCI field module, and / or receiving a configuration or indication of a plurality of indexes, where each index corresponds to one candidate value for each DCI field for the DCI field module, and / or receiving, from the wireless access network node 102, an index of the plurality of indexes for the DCI field module, and deriving the candidate value for each DCI field for the DCI field module based on the index. A bit size for the DCI field module may be based on a number of indexes for the DCI fields for the DCI field module. Similarly, a bit size for each DCI field may be based on the candidate values for the DCI fields. Similarly still, a bit size for the DCI field module may be based on a bit size of each the DCI field in the DCI field module.
[0010] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the method may include the wireless access network node configuring or indicating a plurality of DCI field combinations for the at least one DCI format to the wireless terminal device, and / or indicating one of the plurality of DCI field combinations to use, and / or transmitting information carried by each DCI field of the indicated one of the plurality of DCI field combinations within a candidate PDCCH. The method may also include the wireless access network node 102 indicating a time duration to use the indicated one of the plurality of DCI field combinations, and / or transmitting information carried by each DCI field of the indicated one of the plurality of DCI field combinations within a candidate PDCCH during the time duration.
[0011] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the method may include the wireless terminal device receiving, from the wireless access network node 102, a configuration or indication of a plurality of DCI field combinations for the at least one DCI format, and / or receiving, from the wireless access network node 102, an indication of one of the plurality of DCI field combinations to use, and / or monitoring PDCCH candidates to detect the DCI format and derive information carried by each DCI field of the indicated one of the plurality of DCI field combinations. The method may include receiving an indication of a time duration to use the indicated one of the plurality of DCI field combinations, and / or monitoring Physical Downlink Control Channel (PDCCH) candidates to detect the DCI format and derive information carried by each DCI field of the indicated one of the plurality of DCI field combinations during the time duration.
[0012] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the method may include the wireless terminal device configuring DCI fields for downlink and DCI fields for uplink in a same DCI format, and / or scheduling at least one downlink channel / signal and at least one uplink channel / signal using the DCI format. Similarly, the method may include the wireless terminal device 104 receiving a configuration of DCI fields for downlink and DCI fields for uplink in a same DCI format, and / or receiving a scheduled of at least one downlink channel / signal and at least one uplink channel / signal using the DCI format.
[0013] In some exemplary implementations, which may be combined with any of the other exemplary implementations disclosed herein, the method may include the wireless terminal device configuring an applicable search space type of the DCI format to the wireless terminal device. Similarly, the may include the wireless terminal device receiving a configuration of an applicable search space type of the DCI format to the wireless terminal device.
[0014] In some other implementations, an apparatus for wireless communication such as a network device is disclosed. The network device may include one or more processors and one or more memories, wherein the one or more processors are configured to read computer code from the one or more memories to implement any one of the methods above. The apparatus for wireless communication may be the wireless access network node (e.g., base station) or the wireless terminal device (e.g., UE) .
[0015] In yet some other implementations, a computer program product is disclosed. The computer program product may include a non-transitory computer-readable medium with computer code stored thereupon, the computer code, when executed by one or more processors, causing the one or more processors to implement any one of the methods above.
[0016] The above embodiments and other aspects and alternatives of their implementations are explained in greater detail in the drawings, the descriptions, and the claims below.BRIEF DESCRIPTION OF THE DRAWINGS
[0017] FIG. 1 shows a wireless access network with an exemplary uplink, downlink, and control channel configuration.
[0018] FIG. 2 shows various example processing components of the wireless terminal device and the wireless access network node of FIG. 1.
[0019] FIG. 3 shows an illustrative example of multiple sets of DCI field combinations for a DCI format in accordance with various embodiments.
[0020] FIG. 4 shows an illustrative example set of DCI field modules in accordance with various embodiments.
[0021] FIG. 5 shows an example of a module and candidate values in accordance with various embodiments.DETAILED DESCRIPTION
[0022] The technology and examples of implementations and / or embodiments described in this disclosure can be used to facilitate over-the-air radio resource allocation, configuration, and signaling in wireless access networks as well as operational configuration of a UE and / or a base station within the wireless access networks. The term “exemplary” is used to mean “an example of” and unless otherwise stated, does not imply an ideal or preferred example, implementation, or embodiment. Section headers are used in the present disclosure to facilitate understanding of the disclosed implementations and are not intended to limit the disclosed technology in the sections only to the corresponding section. The disclosed implementations may be further embodied in a variety of different forms and, therefore, the scope of this disclosure or claimed subject matter is intended to be construed as not being limited to any of the embodiments set forth below. The various implementations may be embodied as methods, devices, components, systems, or non-transitory computer readable media. Accordingly, embodiments of this disclosure may, for example, take the form of hardware, software, firmware or any combination thereof.
[0023] In existing 4G and 5G communication systems, the DCI fields for each DCI format are specified in the specification. More specifically, which DCI fields are included in the DCI format and the order among these DCI fields are specified in the specification, which cannot be updated in a flexible manner according to the requirements or optimizations of a particular network. Each DCI field contains one or multiple bits that are used to indicate one type of information. For example, the following DCI fields and the following order of these DCI fields are specified for DCI format 1_0 scrambled with C-RNTI in the 3GPP 5G specification TS38.212. It is not possible for the base station to replace some of the DCI fields or reorder the following DCI fields:
[0024] · Identifier for DCI formats
[0025] · Frequency domain resource assignment
[0026] · Time domain resource assignment
[0027] · VRB-to-PRB mapping
[0028] · Modulation and coding scheme
[0029] · New data indicator
[0030] · Redundancy version
[0031] · HARQ process number
[0032] · Downlink assignment index
[0033] · TPC command for scheduled PUCCH
[0034] · PUCCH resource indicator
[0035] · PDSCH-to-HARQ_feedback timing indicator
[0036] · ChannelAccess-CPext
[0037] · Reserved bits
[0038] However, with the development of artificial intelligence (AI) , especially AI for base station implementation, a base station may be able to determine or predict the most appropriate DCI fields combination for each DCI format. The existing DCI design hinders the flexibility of the DCI fields combination, thereby preventing implementation of this otherwise valuable functionality.
[0039] The present disclosure is directed to handling transmissions in a wireless cellular access network and is specifically directed to mechanisms for providing different field combinations for Downlink Control Information (DCI) . The various example embodiments provide methods including configuring DCI field combinations, including a plurality of DCI fields, for a DCI format in a flexible manner that allows for utilization of other features that may optimize or affect DCI fields combinations.
[0040] Wireless Network Overview
[0041] A wireless communication network may include a radio access network for providing network access to wireless terminal devices, and a core network for routing data between the access networks or between the wireless network and other types of data networks. In a wireless access network, radio resources are provided for allocation and used for transmitting data and control information. FIG. 1 shows an exemplary wireless access network 100 including a wireless access network node (WANN) or wireless base station 102 (herein referred to as wireless base station, base station, wireless access node, wireless access network node, or WANN) and a wireless terminal device or user equipment (UE) 104 (herein referred to as user equipment, UE, terminal device, or wireless terminal device) that communicates with one another via over-the-air (OTA) radio communication resources 106. The wireless access network 100 may be implemented as, as for example, a 2G, 3G, 4G / LTE, or 5G cellular radio access network. Correspondingly, the base station 102 may be implemented as a 2G base station, a 3G node B, an LTE eNB, or a 5G New Radio (NR) gNB. The user equipment 104 may be implemented as mobile or fixed communication devices installed with mobile identity modules for accessing the base station 102. The user equipment 104 may include but is not limited to mobile phones, laptop computers, tablets, personal digital assistants, wearable devices, distributed remote sensor devices, and desktop computers. Alternatively, the wireless access network 100 may be implemented as other types of radio access networks, such as Wi-Fi, Bluetooth, ZigBee, and WiMax networks.
[0042] FIG. 2 further shows example processing components of the WANN 102 and the UE 104 of FIG. 1. The UE 104, for example, may include transceiver circuitry 206 coupled to one or more antennas 208 to effectuate wireless communication with the WANN 102 (or to other UEs) . The transceiver circuitry 206 may also be coupled to a processor 210, which may also be coupled to a memory 212 or other storage devices. The memory 212 may be transitory or non-transitory and may store therein computer instructions or code which, when read and executed by the processor 210, cause the processor 210 to implement various ones of the, functions, methods, and processes of the UE 104 described herein. The memory 212 may also be utilized and allocated for buffering UL and DL transmissions in each band / carrier. The memory 212 may include multiple memory modules assigned to different functions (such as program memory, base band memory, and / or RF memory, to name a few) . Likewise, the WANN 102 may include transceiver circuitry 214 coupled to one or more antennas 216, which may include an antenna tower 218 in various forms, to effectuate wireless communications with the UE 104. The transceiver circuitry 214 may be coupled to one or more processors 220, which may further be coupled to a memory 222 or other storage devices. The memory 222 may be transitory or non-transitory and may store therein instructions or code that, when read and executed by the one or more processors 220, cause the one or more processors 220 to implement various functions, methods, and processes of the WANN 102 described herein.
[0043] Wireless Communication Resource Scheduling / Signaling
[0044] Returning to FIG. 1, the radio communication resources for the over-the-air interface 106 may include a combination of frequency, time, and / or spatial communication resources organized into various resource units or elements in frequency, time, and / or space. The radio communication resources 106 in frequency domain may include portions of licensed radio frequency bands, portions of unlicensed ration frequency bands, or portions of a mix of both licensed and unlicensed radio frequency bands. The radio communication resources 106 available for carrying the wireless communication signals between the base station 102 and user equipment 104 may be further divided into physical downlink channels 110 for transmitting wireless signals from the base station 102 to the user equipment 104 and physical uplink channels 120 for transmitting wireless signals from the user equipment 104 to the base station 102. The physical downlink channels 110 may further include physical downlink control channels (PDCCHs) 112 and physical downlink shared channels (PDSCHs) 114. Likewise, the physical uplink channels 120 may further include physical uplink control channels (PUCCHs) 122 and physical uplink shared channels (PUSCHs) 124. For simplification, other types of downlink and uplink channels are not shown in FIG. 1 but are within the scope of the current disclosure. The control channels PDCCHs 112 and PUCCHs 122 may be used for carrying control information in the form of control messages 116 and 126, herein referred to as Downlink Control Information (DCI) messages or Uplink Control Information (UCI) messages. The shared channels (shared between data and control information) PDSCHs 114 and PUSCHs 124 may be allocated and used for communicating downlink data transmissions 118 and uplink data transmissions 128 between the base station 102 and the user equipment 104.
[0045] The allocation and configuration of the radio communication resources associated with the data channels, such as the PDSCHs and the PUSCHs may be provided by one or more resource scheduling DCIs carried in the PDCCHs. The PDCCHs may be shared by a plurality of UEs in the access network. In various approaches, a particular UE may be configured to perform blind decode procedures on a preconfigured UE-specific Search Space (USS) to detect and identify a payload of a resource scheduling DCI carried in the PDCCH that specifically targets the particular UE. The blind decoding may be performed on preconfigured monitoring occasions of the PDCCH associated with USS. Such monitoring occasions may be referred to as a set of PDCCH candidates. Each PDCCH candidate may be associated with a set of Control Channel Elements (CCEs) . The UE may specifically use its Radio Network Temporary Identifier (RNTI) to decode the PDCCH candidates. The RNTI may be used to demask a PDCCH candidate’s CRC. If no CRC error is detected, the UE determines that PDCCH candidate carries its own control information. The UE may then process the DCI and extract the resource allocation information pertaining to the PDSCH and / or PUSCH for receiving and / or transmitting data.
[0046] Description of New Mechanisms for Providing Different Field Combinations for DCI
[0047] In accordance with the present disclosure, a method is disclosed to provide flexible combinations of Downlink Control Information (DCI) fields. In various embodiments, the methods allow a base station 102 to configure the DCI fields and / or the order among these DCI fields to the UE 104. Once the UE 104 receives the DCI, it can derive the information carried by each DCI field based on the configured DCI fields and / or the order among these DCI fields. For each DCI format, the base station 102 may configure or indicate one or multiple sets of DCI field combinations to the UE 104. Each DCI field combination may contain a plurality of DCI fields and / or an order among these multiple DCI fields. Different DCI field combinations for the same DCI format may contain the same number or a different number of DCI fields.
[0048] The UE 104 may monitor PDCCH candidates to detect the DCI format. Further, the UE 104 nay derive the information carried by each DCI field according to the configured DCI fields and / or order among these DCI fields for the DCI field combination for the DCI format. In certain examples, monitoring implies receiving each Physical Downlink Control Channel (PDCCH) candidate and decoding it according to the monitored DCI format. In some examples, the base station 102 further indicates a bit size the DCI fields, e.g., in the configuration step above. The various embodiments, the base station 102 configures the one or multiple sets of DCI field combinations to the UE 104 via Radio Resource Control (RRC) signaling. In another embodiment, the base station 102 indicates the one or multiple sets of DCI field combinations to the UE 104 via Medium Access Control Control Element (MAC-CE) signaling.
[0049] In accordance with various embodiments, a method performed by a wireless access network node 102 may include configuring or indicating at least one DCI field combination for at least one DCI format to a wireless terminal device, wherein the at least one DCI field combination comprises a plurality of DCI fields. The method may also include the wireless access network node 102 configuring or indicating an order of the plurality of DCI fields of the at least one DCI field combination. The method may also include the wireless access network node 102 transmitting to the wireless terminal device, Downlink Control Information according to the configured at least one DCI field combination. The method may also include the wireless access network node 102 indicating a bit size for the plurality of DCI fields.
[0050] Similarly, a method performed by a wireless terminal device 104 may include the wireless terminal device 104 receiving a configuration or an indication of at least one set of DCI field combination for at least one DCI format from a wireless access network node, wherein the at least one set of DCI field combination comprises a plurality of DCI fields. The method may include the wireless terminal device 104 receiving, from the wireless access network node, a configuration or indication of an order of the plurality of DCI fields of the at least one DCI field combination. The method may include the wireless terminal device 104 deriving Downlink Control Information carried by each of the DCI fields of the plurality of DCI fields according to the configured at least one DCI field combination. The method may include the wireless terminal device 104 deriving Downlink Control Information carried by each of the DCI fields of the plurality of DCI fields according to the configured order of the plurality of DCI fields of the at least one DCI field combination. The method may include the wireless terminal device 104 receiving, from the wireless access network node, a bit size for the plurality of DCI fields.
[0051] The base station 102 may configure DCI fields for downlink (DL) and DCI fields for uplink (UL) in the same DCI format. The DCI format can be used to schedule at least one downlink channel / signal and at least one uplink channel / signal. For example, the downlink channel / signal can be Physical Downlink Shared Channel (PDSCH) and / or Channel State Information Reference Signal (CSI-RS) , and the uplink channel / signal can be Physical Uplink Shared Channels (PUSCH) and / or Sounding Reference Signal (SRS) .
[0052] In accordance with various embodiments, the method performed by the wireless access network node 102 may include configuring DCI fields for downlink and DCI fields for uplink in a same DCI format. The method may also include the wireless access network node 102 scheduling at least one downlink channel / signal and at least one uplink channel / signal using the DCI format. Similarly, the method performed by the wireless terminal device 104 may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration of DCI fields for downlink and DCI fields for uplink in a same DCI format. The method may include the wireless terminal device 104 receiving, from the wireless access network node 102, a scheduled of at least one downlink channel / signal and at least one uplink channel / signal using the DCI format.
[0053] In an example situation where the base station 102 configures multiple sets of DCI field combinations to the UE 104 for the DCI format, the base station 102 may indicate one of the DCI field combinations to the UE 104. The UE 104 may monitor the PDCCH candidates to detect the DCI format and may derive the information carried by each DCI field of the indicated DCI feild combination. In example embodiments, the base station 102 indicates one of the DCI field combinations to the UE 104 via DCI or MAC-CE. In various embodiments, the base station 102 further indicates a time duration for the indicated DCI field combination. The UE 104 may then monitor the PDCCH candidates to detect the DCI format with the indicated DCI field combination during the time duration. In some examples, the base station 102 may configure more than one DCI format to the UE 104. Then, the base station 102 may indicate a subset of DCI formats to the UE 104. The UE 104 may monitor a set of PDCCH candidates to detect the indicated subset of DCI formats and may derive the information carried by each DCI field for each DCI format.
[0054] In accordance with various embodiments, the method performed by the wireless access network node 102 may include configuring or indicating a plurality of DCI field combinations for the at least one DCI format to the wireless terminal device. The method may also include the wireless access network node 102 indicating, to the wireless terminal device 104, one of the plurality of DCI field combinations to use. The method may also include the wireless access network node 102 transmitting, to the wireless terminal device 104, information carried by each DCI field of the indicated one of the plurality of DCI field combinations within a candidate PDCCH. The method may also include the wireless access network node 102 indicating, to the wireless terminal device 104, a time duration to use the indicated one of the plurality of DCI field combinations. The method may also include the wireless access network node 102 transmitting, to the wireless terminal device 104, information carried by each DCI field of the indicated one of the plurality of DCI field combinations within a candidate PDCCH during the time duration.
[0055] Similarly, the method performed by the wireless terminal device 104 may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration or indication of a plurality of DCI field combinations for the at least one DCI format. The method may include the wireless terminal device 104 receiving, from the wireless access network node 102, an indication of one of the plurality of DCI field combinations to use. The method may include the wireless terminal device 104 monitoring PDCCH candidates to detect the DCI format and derive information carried by each DCI field of the indicated one of the plurality of DCI field combinations. The method may include the wireless terminal device 104 receiving, from the wireless access network node 102, an indication of a time duration to use the indicated one of the plurality of DCI field combinations. The method may include the wireless terminal device 104 monitoring, by the wireless terminal device, Physical Downlink Control Channel (PDCCH) candidates to detect the DCI format and derive information carried by each DCI field of the indicated one of the plurality of DCI field combinations during the time duration.
[0056] In various embodiments, the base station 102 may configure the applicable search space type of the DCI format. The search space type can be UE-specific search space that is configured for one UE or a group-common search space that is configured for a group of UEs. In accordance with various embodiments, the method performed by the wireless access network node 102 may include configuring an applicable search space type of the DCI format to the wireless terminal device. Similarly, the method performed by the wireless terminal device 104 may include the wireless terminal device 104 receiving, from the wireless access network node, a configuration of an applicable search space type of the DCI format to the wireless terminal device.
[0057] FIG. 3 provides an illustrative example of multiple sets of DCI field combinations for a DCI format. In this example, as shown in FIG. 3, the base station 102 configures two sets of DCI field combination for DCI format A to the UE 104 via RRC signaling. The base station 102 also indicates the bit size for each DCI field for each DCI field combination. In this example, the DCI field and corresponding bit size for the 1st DCI field combination for DCI format A are as follows:
[0058] Frequency domain resource assignment for downlink, 10 bits.
[0059] Time domain resource assignment for downlink, 5 bits.
[0060] Frequency domain resource assignment for uplink, 10 bits.
[0061] Time domain resource assignment for uplink, 5 bits.
[0062] Modulation and coding scheme, 5 bits.
[0063] Also in this example, the DCI field and corresponding bit size for the 2nd DCI field combination for DCI format A are as follows:
[0064] Frequency domain resource assignment for downlink, 10 bits.
[0065] Time domain resource assignment for downlink, 5 bits.
[0066] Modulation and coding scheme, 5 bits.
[0067] PUCCH resource indicator 2 bits.
[0068] PUCCH resource indicator, 4 bits.
[0069] In this example, the DCI format A contains 5 DCI fields. The base station 102 may indicate the 1st DCI field combination for DCI format A to the UE 104. The UE 104 monitors PDCCH candidates to detect the DCI format A and derive the information carried by each DCI field of the 1st DCI field combination for DCI format A. The 1st DCI field combination for DCI format A can be used to schedule both downlink and uplink transmissions. The base station 102 may configure DCI format A as a UE-specific search space.
[0070] In another embodiment, each DCI field combination may contain one or multiple DCI field modules and / or an order among these modules. The base station 102 may further configure or indicate the DCI fields contained in each module and / or the order among these DCI fields in each module. Each DCI field module may contain one or multiple DCI fields. In certain examples, each DCI field module may contain DCI fields with similar functionality.
[0071] The UE 104 may monitor PDCCH candidates to detect the DCI format and derive the information carried by each DCI field according to the configured DCI fields and order among these DCI fields for the DCI field modules for the DCI field combination for the DCI format.
[0072] FIG. 4 provides an illustrative example set of DCI field modules, which shows the DCI field modules and their corresponding DCI fields for each module for two DCI field combinations for DCI format A. In that example, the first DCI field combination may include a first DCI field module that may be a Resource indication module, which may include DCI fields of Bandwidth part indicator, Frequency domain resource assignment, and Time domain resource assignment. A second DCI field module may be a Modulation and coding module, which may include DCI fields of Modulation and coding scheme, New data indicator, and Redundancy version. A third DCI field module may be a HARQ feedback module, which may include DCI fields of HARQ process number, Downlink assignment index, TPC command for scheduled PUCCH, Second TPC command for scheduled PUCCH, and PUCCH resource indicator. A fourth DCI field module may be a MIMO indication module, which may include DCI fields of Antenna port (s) , Transmission configuration indication, SRS request, SRS offset indicator, and DMRS sequence initialization. A fifth DCI field module may be an Energy saving module, which may include a DCI field of SCell dormancy indication.
[0073] With continued reference to FIG. 4, in this example, a second DCI field combination may include a first DCI field module that may be a Resource indication module, which may include DCI fields of Frequency domain resource assignment, Time domain resource assignment, and VRB-to-PRB mapping. A second DCI field module may be a Modulation and coding module, which may include DCI fields of Modulation and coding scheme, New data indicator, and Redundancy version. A third DCI field module may be a HARQ feedback module, which may include DCI fields of HARQ process number, Downlink assignment index, TPC command for scheduled PUCCH, Second TPC command for scheduled PUCCH, PUCCH resource indicator, and PDSCH-to-HARQ_feedback timing indicator. A fourth DCI field module may be a MIMO indication module, which may include a DCI field of DMRS sequence initialization. A fifth DCI field module may be an Energy saving module, which may include a DCI field of PDCCH monitoring adaptation indication. This example is in no way limiting and many other DCI field modules and DCI fields may be implemented as is best suited for each individual network.
[0074] In accordance with various embodiments, the method performed by the wireless access network node 102 may include configuring or indicating the at least one DCI field combination to include at least one DCI field module. The method may also include the wireless access network node 102 configuring or indicating the at least one DCI field combination to include a plurality of DCI field modules and an order amongst the plurality of DCI field modules. The method may also include the wireless access network node 102 configuring or indicating which DCI fields are contained in each DCI field module. The method may also include the wireless access network node 102 configuring or indicating an order of the DCI fields contained in each DCI field module. The method may also include the wireless access network node 102 configuring or indicating the at least one DCI field module to include at least one DCI field. The method may also include the wireless access network node 102 transmitting, by the wireless access network node to the wireless terminal device, Downlink Control Information carried by each DCI field according to the configured DCI fields of the at least one DCI field module of the at least one DCI field combination within a candidate Physical Downlink Control Channel (PDCCH) .
[0075] Similarly, the method performed by the wireless terminal device 104 may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration or indication of the at least one DCI field combination to include at least one DCI field module. The method may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration or indication of the at least one DCI field combination to include a plurality of DCI field modules and an order amongst the plurality of DCI field modules. The method may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration or indication of which DCI fields are contained in each DCI field module. The method may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration or indication of an order of the DCI fields contained in each DCI field module. The method may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration or indication of the at least one DCI field module to include at least one DCI field. The method may include the wireless terminal device 104 monitoring PDCCH candidates to detect the DCI format and derive information carried by each DCI field according to the configured DCI fields of the at least one DCI field module of the at least one DCI field combination.
[0076] As mentioned above, in an example situation where the base station 102 configures multiple sets of DCI field combinations to the UE 104 for the DCI format, the base station 102 may indicate one of the DCI field combinations to the UE 104. The UE 104 may monitor the PDCCH candidates to detect the DCI format and may derive the information carried by each DCI field of the indicated DCI field combination. In example embodiments, the base station 102 indicates one of the DCI field combinations to the UE 104 via DCI or MAC-CE. In various embodiments, the base station 102 further indicates a time duration for the indicated DCI field combination. The UE 104 may then monitor the PDCCH candidates to detect the DCI format with the indicated DCI field combination during the time duration. In some examples, the base station 102 may configure more than one DCI format to the UE 104. Then, the base station 102 may indicate a subset of DCI formats to the UE 104. The UE 104 may monitor a set of PDCCH candidates to detect the indicated subset of DCI formats and may derive the information carried by each DCI field for each DCI format.
[0077] Further, in certain embodiments, the base station 102 may further configure or indicate the bit size for each DCI field module. Once the UE 104 receives the bits of this DCI format, the UE 104 may derive the information for each DCI field module based on the bit size for each DCI field module and other order among these modules. In accordance with various embodiments, the method performed by the wireless access network node 102 may include indicating a bit size for each one of the at least one DCI field modules. Similarly, the method performed by the wireless terminal device 104 may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration or indication of a bit size for each one of the at least one DCI field modules.
[0078] In some embodiments, the base station 102 may configure or indicate candidate values for various DCI fields for the DCI field module. The base station may further configure or indicate a number of indexes, where each index corresponds to one candidate value for each DCI field for the DCI field module. The bit size for the DCI field module may be based on the number of indexes for DCI fields, i.e., the bit size for the DCI field module may be where Nindex is the number of indexes.
[0079] FIG. 5 shows an example of the “Modulation and coding module” in the first DCI field combination shown in FIG. 4. In this example, indexes and corresponding candidate values for the three DCI fields of the Modulation and coding module are as configured as is shown in FIG. 5. In this example, the bit size for the “Modulation and coding module” will be 2 bits. This represents a possible significant reduction in a number of bits required to communicate candidate values for the DCI fields of the DCI field modules.
[0080] In a similar embodiment, the base station 102 may configure or indicate candidate values for DCI fields for the DCI field module. The bit size for each DCI field may be based on the candidate values for the DCI fields. The bit size for the DCI field module may be based on the bit size for each DCI field in the DCI field module.
[0081] In accordance with various embodiments, the method performed by the wireless access network node 102 may include configuring or indicating candidate values for the DCI fields for the at least one DCI field module. The method may also include the wireless access network node 102 configuring or indicating a plurality of indexes, where each index corresponds to one candidate value for each DCI field for the DCI field module. The method may also include the wireless access network node 102 indicating an index of the plurality of indexes for the DCI field module. Similarly, the method performed by the wireless terminal device 104 may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration or indication of candidate values for the DCI fields for the at least one DCI field module. The method may include the wireless terminal device 104 receiving, from the wireless access network node 102, a configuration or indication of a plurality of indexes, where each index corresponds to one candidate value for each DCI field for the DCI field module. The method may include the wireless terminal device 104 receiving, from the wireless access network node 102, an index of the plurality of indexes for the DCI field module, and deriving the candidate value for each DCI field for the DCI field module based on the index. In these two methods, a bit size for the DCI field module may be based on a number of indexes for the DCI fields for the DCI field module. Similarly, a bit size for each DCI field may be based on the candidate values for the DCI fields. Similarly still, a bit size for the DCI field module may be based on a bit size of each the DCI field in the DCI field module.
[0082] The description and accompanying drawings above provide specific example embodiments and implementations. The described subject matter may, however, be embodied in a variety of different forms and, therefore, covered or claimed subject matter is intended to be construed as not being limited to any example embodiments set forth herein. A reasonably broad scope for claimed or covered subject matter is intended. Among other things, for example, subject matter may be embodied as methods, devices, components, systems, or non-transitory computer-readable media for storing computer codes. Accordingly, embodiments may, for example, take the form of hardware, software, firmware, storage media or any combination thereof. For example, the method embodiments described above may be implemented by components, devices, or systems including memory and processors by executing computer codes stored in the memory.
[0083] Throughout the specification and claims, terms may have nuanced meanings suggested or implied in context beyond an explicitly stated meaning. Likewise, the phrase “in one embodiment / implementation / example / approach” as used herein does not necessarily refer to the same embodiment and the phrase “in another embodiment / implementation / example / approach” as used herein does not necessarily refer to a different embodiment. It is intended, for example, that claimed subject matter includes combinations of example embodiments in whole or in part.
[0084] In general, terminology may be understood at least in part from usage in context. For example, terms, such as “and” , “or” , or “and / or, ” as used herein may include a variety of meanings that may depend at least in part on the context in which such terms are used. Typically, “or” if used to associate a list, such as A, B or C, is intended to mean A, B, and C, here used in the inclusive sense, as well as A, B or C, here used in the exclusive sense. In addition, the term “one or more” as used herein, depending at least in part upon context, may be used to describe any feature, structure, or characteristic in a singular sense or may be used to describe combinations of features, structures or characteristics in a plural sense. Similarly, terms, such as “a, ” “an, ” or “the, ” may be understood to convey a singular usage or to convey a plural usage, depending at least in part upon context. In addition, the term “based on” may be understood as not necessarily intended to convey an exclusive set of factors and may, instead, allow for existence of additional factors not necessarily expressly described, again, depending at least in part on context.
[0085] Reference throughout this specification to features, advantages, or similar language does not imply that all of the features and advantages that may be realized with the present solution should be or are included in any single implementation thereof. Rather, language referring to the features and advantages is understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, discussions of the features and advantages, and similar language, throughout the specification may, but do not necessarily, refer to the same embodiment.
[0086] Furthermore, the described features, advantages and characteristics of the present solution may be combined in any suitable manner in one or more embodiments. One of ordinary skill in the relevant art will recognize, in light of the description herein, that the present solution can be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the present solution.
Claims
1.A method performed by a wireless access network node comprising:configuring or indicating at least one Downlink Control Information (DCI) field combination for at least one DCI format to a wireless terminal device,wherein the at least one DCI field combination comprises a plurality of DCI fields.2.The method according to claim 1, comprising:configuring or indicating, by the wireless access network node, an order of the plurality of DCI fields of the at least one DCI field combination.3.The method according to any of claims 1 and 2, comprising:transmitting, by the wireless access network node to the wireless terminal device, Downlink Control Information according to the configured at least one DCI field combination.4.The method according to any of claims 1 to 3, comprising:indicating, by the wireless access network node, a bit size for the plurality of DCI fields.5.The method according to claim 1, comprising:configuring or indicating the at least one DCI field combination to include at least one DCI field module.6.The method according to claim 5, comprising:configuring or indicating the at least one DCI field combination to include a plurality of DCI field modules and an order amongst the plurality of DCI field modules.7.The method according to any of claims 5 and 6, comprising:configuring or indicating which DCI fields are contained in each DCI field module.8.The method according to claim 7, comprising:configuring or indicating an order of the DCI fields contained in each DCI field module.9.The method according to any of claims 5 to 8, comprising:configuring or indicating the at least one DCI field module to include at least one DCI field.10.The method according to any of claims 5 to 9, comprising:transmitting, by the wireless access network node to the wireless terminal device, Downlink Control Information carried by each DCI field according to the configured DCI fields of the at least one DCI field module of the at least one DCI field combination within a candidate Physical Downlink Control Channel (PDCCH) .11.The method according to any of claims 5 to 10, comprising:indicating, by the wireless access network node, a bit size for each one of the at least one DCI field modules.12.The method according to any of claims 5 to 11, comprising:configuring or indicating, by the wireless access network node, candidate values for the DCI fields for the at least one DCI field module.13.The method according to claim 12, comprising:configuring or indicating, by the wireless access network node, a plurality of indexes, where each index corresponds to one candidate value for each DCI field for the DCI field module.14.The method according to claim 13, comprising:indicating, by the wireless access network node, an index of the plurality of indexes for the DCI field module.15.The method according to claim 13,wherein a bit size for the DCI field module is based on a number of indexes for the DCI fields for the DCI field module.16.The method according to claim 12,wherein a bit size for each DCI field is based on the candidate values for the DCI fields.17.The method according to any of claims 5 to 12,wherein a bit size for the DCI field module is based on a bit size of each of the DCI fields in the DCI field module.18.The method according to any of claims 1 to 17, comprising:configuring or indicating a plurality of DCI field combinations for the at least one DCI format to the wireless terminal device.19.The method according to claim 18, comprising:indicating, by the wireless access network node to the wireless terminal device, one of the plurality of DCI field combinations to use.20.The method according to claim 19, comprising:transmitting, by the wireless access network node to the wireless terminal device, information carried by each DCI field of the indicated one of the plurality of DCI field combinations within a candidate Physical Downlink Control Channel (PDCCH) .21.The method according to any of claims 19 and 20, comprising:indicating, by the wireless access network node to the wireless terminal device, a time duration to use the indicated one of the plurality of DCI field combinations.22.The method according to claim 21, comprising:transmitting, by the wireless access network node to the wireless terminal device, information carried by each DCI field of the indicated one of the plurality of DCI field combinations within a candidate Physical Downlink Control Channel (PDCCH) during the time duration.23.The method according to any of claims 1 to 22, comprising:configuring, by the wireless access network node, DCI fields for downlink and DCI fields for uplink in a same DCI format.24.The method according to claim 23, comprising:scheduling at least one downlink channel / signal and at least one uplink channel / signal using the DCI format.25.The method according to any of claims 1 to 24, comprising:configuring an applicable search space type of the DCI format to the wireless terminal device.26.A method performed by a wireless terminal device comprising:receiving a configuration or an indication of at least one set of Downlink Control Information (DCI) field combination for at least one DCI format from a wireless access network node,wherein the at least one set of DCI field combination comprises a plurality of DCI fields.27.The method according to claim 26, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of an order of the plurality of DCI fields of the at least one DCI field combination.28.The method according to any of claims 26 and 27, comprising:deriving, by the wireless terminal device, Downlink Control Information carried by each of the DCI fields of the plurality of DCI fields according to the configured at least one DCI field combination.29.The method according to any of claims 26 to 28, comprising:deriving, by the wireless terminal device, Downlink Control Information carried by each of the DCI fields of the plurality of DCI fields according to the configured order of the plurality of DCI fields of the at least one DCI field combination.30.The method according to any of claims 26 to 29, comprising:receiving, by the wireless terminal device from the wireless access network node, a bit size for the plurality of DCI fields.31.The method according to claim 26, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of the at least one DCI field combination to include at least one DCI field module.32.The method according to claim 31, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of the at least one DCI field combination to include a plurality of DCI field modules and an order amongst the plurality of DCI field modules.33.The method according to any of claims 31 and 32, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of which DCI fields are contained in each DCI field module.34.The method according to claim 33, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of an order of the DCI fields contained in each DCI field module.35.The method according to any of claims 31 to 34, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of the at least one DCI field module to include at least one DCI field.36.The method according to any of claims 31 to 35, comprising:monitoring, by the wireless terminal device, Physical Downlink Control Channel (PDCCH) candidates to detect the DCI format and derive information carried by each DCI field according to the configured DCI fields of the at least one DCI field module of the at least one DCI field combination.37.The method according to any of claims 31 to 36, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of a bit size for each one of the at least one DCI field modules.38.The method according to any of claims 31 to 37, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of candidate values for the DCI fields for the at least one DCI field module.39.The method according to claim 38, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of a plurality of indexes, where each index corresponds to one candidate value for each DCI field for the DCI field module.40.The method according to claim 39, comprising:receiving, by the wireless terminal device from the wireless access network node, an index of the plurality of indexes for the DCI field module; andderiving, by the wireless terminal device, the candidate value for each DCI field for the DCI field module based on the index.41.The method according to claim 39, wherein a bit size for the DCI field module is based on a number of indexes for the DCI fields.42.The method according to claim 38, wherein a bit size for each DCI field is based on the candidate values for the DCI fields.43.The method according to any of claims 31 to 38,wherein a bit size for the DCI field module is based on a bit size of each of the DCI fields in the DCI field module.44.The method according to any of claims 26 to 43, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration or indication of a plurality of DCI field combinations for the at least one DCI format.45.The method according to claim 44, comprising:receiving, by the wireless terminal device from the wireless access network node, an indication of one of the plurality of DCI field combinations to use.46.The method according to claim 45, comprising:monitoring, by the wireless terminal device, Physical Downlink Control Channel (PDCCH) candidates to detect the DCI format and derive information carried by each DCI field of the indicated one of the plurality of DCI field combinations.47.The method according to any of claims 45 and 46, comprising:receiving, by the wireless terminal device from the wireless access network node, an indication of a time duration to use the indicated one of the plurality of DCI field combinations.48.The method according to claim 47, comprising:monitoring, by the wireless terminal device, Physical Downlink Control Channel (PDCCH) candidates to detect the DCI format and derive information carried by each DCI field of the indicated one of the plurality of DCI field combinations during the time duration.49.The method according to any of claims 26 to 48, comprising:receiving, by the wireless terminal device from the wireless access network node, a configuration of DCI fields for downlink and DCI fields for uplink in a same DCI format.50.The method according to claim 49, comprising:receiving, by the wireless terminal device from the wireless access network node, a scheduled of at least one downlink channel / signal and at least one uplink channel / signal using the DCI format.51.The method according to any of claims 26 to 50, comprising:receiving, from the wireless access network node, a configuration of an applicable search space type of the DCI format to the wireless terminal device.52.An apparatus for wireless communication comprising a processor that is configured to carry out the method of any of claims 1 to 51.53.A non-transitory computer readable medium having code stored thereon, the code when executed by a processor, causing the processor to implement the method recited in any of claims 1 to 51.