# US 11,445,441 B2 · PDCCH blind detection method, terminal and network side device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,441 B2 - Document ID: US11445441B2 - Status: Granted - Kind: B2 - Application number: 15/734,818 - Filed: 2019-05-29 - Published: 2021-07-29 - Granted: 2022-09-13 - Earliest claimed: 2018-06-04 - Assignees: Datang Mobile Communications Equipment Co., Ltd. - Applicants: Datang Mobile Communications Equipment Co., Ltd. - Inventors: Jiaqing Wang; Deshan Miao; Di Zhang; Fangchen Cheng - Web page: https://patentgrep.com/patent/US11445441B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 52/0229: {where the received signal is a wanted signal} - H04L 1/0038: {Blind format detection (for detection of modulation format H04L27/0012)} - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 52/0235: {where the received signal is a power saving command} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - Y02D 30/70: in wireless communication networks - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A PDCCH blind detection method, a terminal and a network side device are provided. The method includes: detecting, by a terminal, an energy saving signal in an energy saving signal window; blindly detecting, by the terminal, the PDCCH within a target time if the energy saving signal is detected, a distance between the target time and a position where the energy saving signal is detected is within a preset time distance range. ## Claims ### Claim 1 A Physical Downlink Control Channel (PDCCH) blind detection method, comprising: detecting, by a terminal, an energy saving signal in an energy saving signal window; blindly detecting, by the terminal, the PDCCH within a target time if the energy saving signal is detected, wherein a distance between the target time and a position where the energy saving signal is detected is within a preset time distance range, wherein, the target time is an activation time of Discontinuous Reception (DRX); the activation time is configured by a network side device, and the position where the energy saving signal is detected is within the activation time; or the activation time is an activation time after the position where the energy saving signal is detected among a plurality of activation times configured by the network side device. ### Claim 2 (depends on 1) The method according to claim 1, wherein if the terminal is in a connected state, the position where the energy saving signal is detected is within the activation time, or the activation time is the activation time after the position where the energy saving signal is detected; and/or if the terminal is in a disconnected state, the position where the energy saving signal is detected is within the activation time. ### Claim 3 (depends on 1) The method according to claim 1, wherein the energy saving signal window is located before the activation time, and the energy saving signal window includes one or more candidate positions; or the energy saving signal window includes candidate positions located before the activation time, and further includes candidate positions located within the activation time; or the energy saving signal window is within the activation time, and the energy saving signal window includes one or more candidate positions. ### Claim 4 (depends on 1) The method according to claim 1, wherein time intervals between a plurality of candidate positions included in the energy saving signal window are equal; or the candidate positions in the energy saving signal window are determined according to prior information of an end for transmitting the energy saving signal; or the candidate positions in the energy saving signal window are configured on demand. ### Claim 5 (depends on 4) The method according to claim 4, wherein if the candidate positions in the energy saving signal window are configured on demand, an interval between the candidate position for transmitting the energy saving signal and the PDCCH is 0, or the interval between the candidate position for transmitting the energy saving signal and the PDCCH does not exceed a preset value. ### Claim 6 (depends on 1) The method according to claim 1, wherein the energy saving signal includes a first signal subset and a second signal subset, and the first signal subset is located before the second signal subset. ### Claim 7 (depends on 6) The method according to claim 6, wherein an interval between a location where the second signal subset is located and the PDCCH is 0, or the interval between the location where the second signal subset is located and the PDCCH does not exceed a preset value. ### Claim 8 (depends on 6) The method according to claim 6, wherein, if the energy saving signal is detected, blindly detecting, by the terminal, the PDCCH within the activation time of DRX, comprising: if the first signal subset is detected, waking up, by the terminal, a receiver of the terminal; if the second signal subset is detected, blindly detecting, by the terminal, the PDCCH within the activation time of DRX. ### Claim 9 A PDCCH monitoring method, comprising: transmitting, by a network side device, an energy saving signal within an energy saving signal window, so that if the terminal has detected the energy saving signal, a PDCCH is blindly detected within a target time, wherein a distance between the target time and a position where the energy saving signal is detected is within a preset time distance range, wherein the target time is an activation time of DRX; the activation time is configured by the network side device, and the position where the energy saving signal is detected is within the activation time; or the activation time is an activation time after the position where the energy saving signal is detected among a plurality of activation times configured by the network side device. ### Claim 10 (depends on 9) The method according to claim 9, wherein if the terminal is in a connected state, the position where the energy saving signal is detected is within the activation time, or the activation time is the activation time after the position where the energy saving signal is detected; and/or if the terminal is in a disconnected state, the position where the energy saving signal is detected is within the activation time. ### Claim 11 (depends on 9) The method according to claim 9, wherein the energy saving signal window is located before the activation time, and the energy saving signal window includes one or more candidate positions; or the energy saving signal window includes candidate positions located before the activation time, and further includes candidate positions located within the activation time; or the energy saving signal window is within the activation time, and the energy saving signal window includes one or more candidate positions. ### Claim 12 (depends on 9) The method according to claim 9, wherein the time intervals between a plurality of candidate positions included in the energy saving signal window are equal; or the candidate positions in the energy saving signal window are determined according to prior information of the network side device; or the candidate positions in the energy saving signal window are configured on demand. ### Claim 13 (depends on 12) The method according to claim 12, wherein if the candidate positions in the energy saving signal window are configured on demand, an interval between the candidate position for transmitting the energy saving signal and the PDCCH is 0, or the interval between the candidate position for transmitting the energy saving signal and the PDCCH does not exceed a preset value. ### Claim 14 (depends on 9) The method according to claim 9, wherein the energy saving signal includes a first signal subset and a second signal subset, and the first signal subset is located before the second signal subset. ### Claim 15 (depends on 14) The method according to claim 14, wherein an interval between a location where the second signal subset is located and the PDCCH is 0, or the interval between the location where the second signal subset is located and the PDCCH does not exceed a preset value. ### Claim 16 (depends on 9) The method according to claim 9, wherein the network side device configures configuration information of the energy saving signal window for the terminal in a semi-static, static or dynamic manner. ### Claim 17 A terminal, comprising: a transceiver, a memory, a processor, and a program stored in the memory and executed by the processor, wherein: the processor is configured to detect an energy saving signal in an energy saving signal window; and if the energy saving signal is detected, the PDCCH is blindly detected within a target time, wherein a distance between the target time and a position where the energy saving signal is detected is within a preset time distance range, wherein, the target time is an activation time of Discontinuous Reception (DRX); the activation time is configured by a network side device, and the position where the energy saving signal is detected is within the activation time; or the activation time is an activation time after the position where the energy saving signal is detected among a plurality of activation times configured by the network side device. ### Claim 18 (depends on 9) A network side device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executed by the processor, wherein: the processor is configured to implement the PDCCH monitoring method according to claim 9.