# US 10,455,502 B2 · Operation of user equipment in C-DRx mode with token bucket based access > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,502 B2 - Document ID: US10455502B2 - Status: Granted - Kind: B2 - Application number: 15/414,451 - Filed: 2017-01-24 - Published: 2018-02-08 - Granted: 2019-10-22 - Earliest claimed: 2016-08-02 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Santosh Abraham; Naga Bhushan; Tingfang Ji - Web page: https://patentgrep.com/patent/US10455502B2 ## CPC - H04W 52/0212: {managed by the network, e.g. network or access point is leader and terminal is follower} - H04L 47/215: using token-bucket - H04W 74/08: Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) - H04W 76/15: Setup of multiple wireless link connections - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 64/00: Locating users or terminals {or network equipment} for network management purposes, e.g. mobility management - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W 88/08: Access point devices - Y02D 30/70: in wireless communication networks - 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) - 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 Systems, methods, and apparatus for transmitting additional information over a radio access network are described. A method of wireless communication includes aligning a discontinuous reception (DRx) schedule for a user equipment (UE) with a plurality of token arrival times, determining, at a time based on a first token arrival time, whether a radio frequency (RF) band is available for communication, and transmitting control information on the RF band when the RF band is available for communication. The token arrival time may correspond to a waking time for the UE defined by the DRx schedule. ## Claims ### Claim 1 A method of wireless communication at a user equipment having a radio frequency transceiver, comprising: while operating in a low-power state with the radio transceiver off, determining at the user equipment that a token bucket contains a first token at a waking time defined by a discontinuous reception (DRx) schedule that was established through communication with a scheduling entity; exiting the low-power state in response to a determination that the token bucket contains the first token at the waking time, wherein exiting the low-power state comprises powering up the radio transceiver; and receiving control information transmitted by the scheduling entity over a radio frequency band at or near a token arrival time corresponding to the first token. ### Claim 2 (depends on 1) The method of claim 1, wherein the control information is received from a first access block transmitted on the radio frequency band. ### Claim 3 (depends on 2) The method of claim 2, further comprising: determining that the token bucket contains a second token after completion of the communication of the first access block; and receiving a second access block transmitted on the radio frequency band in response to a determination that the token bucket contains the second token. ### Claim 4 (depends on 2) The method of claim 2, further comprising: determining that the token bucket contains a fractional token after completion of the communication of the first access block; and receiving control information from a shortened access block transmitted on the radio frequency band in response to a determination that the token bucket contains the fractional token. ### Claim 5 (depends on 2) The method of claim 2, further comprising: receiving the control information in a short control frame transmitted on the radio frequency band. ### Claim 6 (depends on 5) The method of claim 5, wherein the short control frame comprises a physical downlink control channel. ### Claim 7 (depends on 1) The method of claim 1, wherein the radio frequency transceiver is used to receive the control information. ### Claim 8 (depends on 1) The method of claim 1, wherein content of the token bucket and token arrival times are updated through information received from the scheduling entity. ### Claim 9 (depends on 1) The method of claim 1, wherein: the control information is received using wireless local area network technology; and the DRx schedule is defined using 5th Generation Mobile Telecommunications technology. ### Claim 10 An apparatus for wireless communication comprising: a transceiver adapted to communicate on a radio frequency (RF) band; a memory; and a processor coupled to the memory, wherein the processor is configured to: determine, while the apparatus is operating in a low-power state with the transceiver off, that a token bucket contains a first token at a waking time defined by a discontinuous reception (DRx) schedule that was established through communication with a scheduling entity; turn the transceiver on to exit the low-power state in response to a determination that the token bucket contains a first token at the waking time; and receive control information transmitted by the scheduling entity over a radio frequency band at or near a token arrival time corresponding to the first token. ### Claim 11 (depends on 10) The apparatus of claim 10, wherein the control information is received from a first access block transmitted on the radio frequency band. ### Claim 12 (depends on 11) The apparatus of claim 11, wherein the processor is configured to: determine that the token bucket contains a second token after completion of the communication of the first access block; and receive a second access block transmitted on the radio frequency band in response to a determination that the token bucket contains the second token. ### Claim 13 (depends on 11) The apparatus of claim 11, wherein the processor is configured to: determine that the token bucket contains a fractional token after completion of the communication of the first access block; and receive control information from a shortened access block transmitted on the radio frequency band in response to a determination that the token bucket contains a fractional token. ### Claim 14 (depends on 11) The apparatus of claim 11, wherein the processor is configured to: receive the control information in a short control frame transmitted on the radio frequency band, wherein the short frame does not require the use of a token. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the short control frame comprises a physical downlink control channel. ### Claim 16 (depends on 10) The apparatus of claim 10, wherein content of the token bucket and token arrival times are updated through information received from the scheduling entity. ### Claim 17 (depends on 10) The apparatus of claim 10, wherein: the transceiver is adapted to communicate on the RF band using a wireless local area network (WLAN) technology; and the DRx schedule is defined using 5th Generation Mobile Telecommunications technology. ### Claim 18 A method of wireless communication, comprising: determining that a token bucket contains or does not contain a first token at a wake up time defined by a discontinuous reception (DRx) schedule for user equipment; in response to a determination that the token bucket contains a first token at the wake up time: determining that a radio frequency band is available for communication; reserving the radio frequency band for communication, wherein reserving the radio frequency band comprises sending a first reservation signal; and transmitting control information in a first access block on the radio frequency band after reserving the radio frequency band; and in response to a determination that the token bucket does not contain a first token at the wake up time, transmitting control information on the radio frequency band in a physical downlink control channel. ### Claim 19 (depends on 18) The method of claim 18, wherein the first reservation signal comprises a clear-to-send, and wherein the first reservation signal precedes the first access block. ### Claim 20 (depends on 18) The method of claim 18, further comprising: determining that the token bucket contains a second token after completion of the communication on the radio frequency band during the access block; and sending a second reservation signal if the token bucket contains the second token. ### Claim 21 (depends on 18) The method of claim 18, further comprising: determining that the token bucket contains a fractional token after completion of the communication of the access block; communicating on the radio frequency band during a shortened access block after the first access block in response to a determination that the token bucket contains the fractional token; and transmitting the control information in the shortened access block. ### Claim 22 (depends on 18) The method of claim 18, wherein: communicating on the radio frequency band includes using wireless local area network technology; and the DRx schedule is defined using 5th Generation Mobile Telecommunications technology. ### Claim 23 An apparatus for wireless communication comprising: a transceiver adapted to communicate on a radio frequency (RF) band; a memory; and a processor coupled to the memory, wherein the processor is configured to: determine that a token bucket contains or does not contain a token at a wake up time defined by a discontinuous reception (DRx) schedule for user equipment; determine that a radio frequency band is available for communication in response to a determination that the token bucket contains a first token at the wake up time; transmit control information in a first access block on the radio frequency band in response to determinations that the token bucket contains a first token and the radio frequency band is available for communication; and transmit control information on the radio frequency band in a short control frame in response to a determination that the token bucket does not contain a token at the wake up time, wherein the short control frame does not require the use of a token. ### Claim 24 (depends on 23) The apparatus of claim 23, wherein the short control frame comprises a physical downlink control channel. ### Claim 25 (depends on 23) The apparatus of claim 23, wherein the processor is configured to: send a first reservation signal to reserve the radio frequency band for communication of the first access block in response to a determination that the token bucket contains the first token; and transmit the first access block after the radio frequency band is reserved. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein the first reservation signal comprises a clear-to-send, and wherein the first reservation signal precedes the first access block. ### Claim 27 (depends on 25) The apparatus of claim 25, wherein the processor is configured to: determine that the token bucket contains a second token after completion of the communication on the radio frequency band during the access block; and send a second reservation signal if the token bucket contains a token. ### Claim 28 (depends on 25) The apparatus of claim 25, wherein the processor is configured to: determine that the token bucket contains a fractional token after completion of the communication of the access block; communicate in a shortened access block the radio frequency band after the first access block in response to a determination that the token bucket contains the fractional token; and transmit the control information in the shortened access block. ### Claim 29 (depends on 23) The apparatus of claim 23, wherein the processor is configured to: communicate on the RF band using wireless local area network (WLAN) technology; and define the DRx schedule using 5th Generation Mobile Telecommunications technology.