# US 11,445,536 B2 · Downlink control information transmission method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,536 B2 - Document ID: US11445536B2 - Status: Granted - Kind: B2 - Application number: 16/890,006 - Filed: 2020-06-02 - Published: 2020-09-17 - Granted: 2022-09-13 - Earliest claimed: 2018-02-14 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Junchao Li; Hao Tang; Zhenfei Tang - Web page: https://patentgrep.com/patent/US11445536B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/232: the control data signalling from the physical layer, e.g. DCI signalling - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 5/001: {the frequencies being arranged in component carriers} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An embodiment of this application provides a downlink control information transmission method and an apparatus. The method includes: receiving first downlink control information DCI in search space of a first carrier bandwidth part BWP, where if a frequency domain resource allocation type of the first BWP is a type 0, an Lf-bit frequency domain resource allocation indication in the first DCI is an Lf-bit bitmap, and bits in the Lf-bit bitmap in descending order are respectively corresponding to resource block groups RBG 0 to RBG (Lf−1) in a second BWP; and for one bit in the Lf-bit bitmap, when a value of the bit is t1, an allocated resource includes one RBG corresponding to the bit. ## Claims ### Claim 1 A method, comprising: receiving, by a device, first downlink control information (DCI) through a first bandwidth part (BWP), wherein the first DCI comprises a BWP indication and a first frequency domain resource allocation indication, and a second BWP is indicated by the BWP indication; and in response to a first resource allocation type and a second resource allocation type being configured for the second BWP, and in response to a size of an information field of the first frequency domain resource allocation indication being less than a size of an information field of a second frequency domain resource allocation indication, indicating, by the first frequency domain resource allocation indication, a frequency domain resource in the second BWP through the first resource allocation type, and the second frequency domain resource allocation indication is receivable in the second BWP to indicate the frequency domain resource in the second BWP. ### Claim 2 (depends on 1) The method according to claim 1, further comprising determining the frequency domain resource in the second BWP according to the first frequency domain resource allocation indication through the first resource allocation type. ### Claim 3 (depends on 1) The method according to claim 1, wherein: the first frequency domain resource allocation indication comprises N bits, and the N bits respectively correspond to resource block groups (RBG) 0 to RBG (N—1) in the second BWP, wherein N is an integer greater than or equal to 1; and for each of the N bits, when a value of a respective bit of the N bits is 1, the frequency domain resource in the second BWP comprises a RBG corresponding to the respective bit; or when a value of the respective bit is not 1, the frequency domain resource in the second BWP does not comprise a RBG corresponding to the respective bit. ### Claim 4 (depends on 3) The method according to claim 3, wherein N is equal to a quantity of RBGs comprised in the second BWP. ### Claim 5 (depends on 1) The method according to claim 1, wherein second DCI comprises the second frequency domain resource allocation indication, and the second DCI is received in the second BWP. ### Claim 6 A method, comprising: sending first downlink control information (DCI) through a first bandwidth part (BWP), wherein the first DCI comprises a BWP indication and a first frequency domain resource allocation indication, and a second BWP is indicated by the BWP indication; and in response to a first resource allocation type and a second resource allocation type being configured for the second BWP, and in response to a size of an information field of the first frequency domain resource allocation indication being less than a size of an information field of a second frequency domain resource allocation indication, indicating, by the first frequency domain resource allocation indication, a frequency domain resource in the second BWP through the first resource allocation type, and the second frequency domain resource allocation indication is transmittable in the second BWP to indicate the frequency domain resource in the second BWP. ### Claim 7 (depends on 6) The method according to claim 6, wherein: the first frequency domain resource allocation indication comprises N bits, and the N bits respectively correspond to resource block groups (RBG) 0 to RBG (N—1) in the second BWP, wherein N is an integer greater than or equal to 1; and for each of the N bits, when a value of a respective bit of the N bits is 1, the frequency domain resource in the second BWP comprises a RBG corresponding to the respective bit, or when a value of the respective bit is not 1, the frequency domain resource in the second BWP does not comprise a RBG corresponding to the respective bit. ### Claim 8 (depends on 7) The method according to claim 7, wherein N is equal to a quantity of RBGs comprised in the second BWP. ### Claim 9 (depends on 6) The method according to claim 6, wherein second DCI comprises the second frequency domain resource allocation indication, and the second DCI is transmitted in the second BWP. ### Claim 10 An apparatus, comprising: a non-transitory memory; and a processor coupled to the non-transitory memory, wherein processor is configured to: receive first downlink control information (DCI) through a first bandwidth part (BWP), wherein the first DCI comprises a BWP indication and a first frequency domain resource allocation indication, and a second BWP is indicated by the BWP indication; and in response to a first resource allocation type and a second resource allocation type being configured for the second BWP, and in response to a size of an information field of the first frequency domain resource allocation indication being less than size of an information field of a second frequency domain resource allocation indication, indicate, by the first frequency domain resource allocation indication, a frequency domain resource in the second BWP through the first resource allocation type, and the second frequency domain resource allocation indication receivable in the second BWP to indicate the frequency domain resource in the second BWP. ### Claim 11 (depends on 10) The apparatus according to claim 10, wherein the processor is further configured to determine the frequency domain resource in the second BWP according to the first frequency domain resource allocation indication through the first resource allocation type. ### Claim 12 (depends on 10) The apparatus according to claim 10, wherein: the first frequency domain resource allocation indication comprises N bits, and the N bits respectively correspond to resource block groups (RBG) 0 to RBG (N−1) in the second BWP, wherein N is an integer greater than or equal to 1; and for each of the N bits, when a value of a respective bit of the N bits is 1, the frequency domain resource in the second BWP comprises a RBG corresponding to the respective bit, or when a value of the respective bit is not 1, the frequency domain resource in the second BWP does not comprise a RBG corresponding to the respective bit. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein N is equal to a quantity of RBGs comprised in the second BWP. ### Claim 14 (depends on 10) The apparatus according to claim 10, wherein second DCI comprises the second frequency domain resource allocation indication, and the second DCI is received in the second BWP. ### Claim 15 (depends on 10) The apparatus according to claim 10, further comprising a transceiver, and the transceiver is used by the apparatus to communicate with a network device. ### Claim 16 An apparatus, comprising: a non-transitory memory; and a processor coupled to the non-transitory memory, wherein the processor is configured to: send first downlink control information (DCI) through a first bandwidth part (BWP), wherein the first DCI comprises a BWP indication and a first frequency domain resource allocation indication, and a second BWP is indicated by the BWP indication; and in response to a first resource allocation type and a second resource allocation type being configured for the second BWP, and in response to a size of an information field of the first frequency domain resource allocation indication being less than a size of an information field of a second frequency domain resource allocation indication, indicating, by the first frequency domain resource allocation indication, a frequency domain resource in the second BWP through the first resource allocation type, and the second frequency domain resource allocation indication is transmittable in the second BWP to indicate the frequency domain resource in the second BWP. ### Claim 17 (depends on 16) The apparatus according to claim 16, wherein: the first frequency domain resource allocation indication comprises N bits, and the N bits respectively correspond to resource block groups (RBG) 0 to RBG (N−1) in the second BWP, wherein N is an integer greater than or equal to 1; and for each of the N bits, when a value of a respective bit of the N bits is 1, the frequency domain resource in the second BWP comprises a RBG corresponding to the respective bit, or when a value of the respective bit is not 1, the frequency domain resource in the second BWP does not comprise a RBG corresponding to the respective bit. ### Claim 18 (depends on 16) The apparatus according to claim 16, wherein N is equal to a quantity of RBGs comprised in the second BWP. ### Claim 19 (depends on 16) The apparatus according to claim 16, wherein second DCI comprises the second frequency domain resource allocation indication, and the second DCI is transmitted in the second BWP.