# US 10,321,333 B2 · Beam switching with reset states > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,321,333 B2 - Document ID: US10321333B2 - Status: Granted - Kind: B2 - Application number: 15/705,138 - Filed: 2017-09-14 - Published: 2018-03-22 - Granted: 2019-06-11 - Earliest claimed: 2016-09-16 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Sumeeth Nagaraja; Tao Luo; Ajay Gupta; Makesh Pravin John Wilson; Kaushik Chakraborty; Sony Akkarakaran; Vinod Viswanatha Menon - Web page: https://patentgrep.com/patent/US10321333B2 ## CPC - H04W 16/28: using beam steering - H04B 7/0617: {for beam forming} - H04B 7/0628: {Diversity capabilities} - H04B 7/0696: {Determining beam pairs} - H04B 7/088: {using beam selection} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract Apparatuses and methods of beam switching are presented. A first beam switch message (BSM) is transmitted to a second device, the first BSM including a first instruction for switching beams. A reset state is selected from a plurality of reset states including a first state for the second device to disregard the first instruction and a second state for the second device to maintain execution of the first instruction. A second BSM is transmitted to the second device before the second device completes execution of the first instruction. The second BSM includes a second instruction for switching beams and indicating which reset state is selected. ## Claims ### Claim 1 A method of wireless communication of a first device, comprising: transmitting a first beam switch message (BSM) to a second device, the first BSM including a first instruction for switching beams; selecting a reset state from a plurality of reset states including a first state for the second device to disregard the first instruction and a second state for the second device to maintain execution of the first instruction; and transmitting a second BSM different from the first BSM to the second device before the second device completes execution of the first instruction, the second BSM including a second instruction for switching beams and indicating which reset state is selected, wherein the first instruction includes a first switch time and the second instruction includes a second switch time later than the first switch time. ### Claim 2 (depends on 1) The method of claim 1, further comprising determining that an acknowledgment in response to the transmitted first BSM is unreceived from the second device, wherein the reset state is selected to be the first state based on determining that the acknowledgment in response to the transmitted first BSM is unreceived from the second device. ### Claim 3 (depends on 1) The method of claim 1, wherein the first instruction for switching beams indicates to the second device to switch to a first beam set at a first time, the method further comprising determining that the second device should switch to a second beam set after maintaining execution of the first instruction, wherein the reset state is selected to be the second state based on determining that the second device should switch to the second beam set after maintaining execution of the first instruction. ### Claim 4 (depends on 1) The method of claim 1, wherein the second BSM indicates which reset state is selected by a reset state flag set to true or false. ### Claim 5 (depends on 1) The method of claim 1, wherein the second BSM indicates one of the reset states by excluding information that one of the reset states was selected. ### Claim 6 (depends on 1) The method of claim 1, wherein the second BSM is transmitted prior to the first switch time. ### Claim 7 (depends on 1) The method of claim 1, wherein the second BSM is transmitted after the first switch time. ### Claim 8 A method of wireless communication of a first device, comprising: receiving a second beam switch message (BSM) from a second device, the second BSM including a second instruction for switching beams and indicating a reset state associated with a first BSM including a first instruction for switching beams, wherein the first BSM is different from the second BSM, wherein the first instruction includes a first switch time and the second instruction includes a second switch time later than the first switch time; and determining whether to disregard the first instruction or to maintain execution of the first instruction based on the indicated reset state. ### Claim 9 (depends on 8) The method of claim 8, further comprising: receiving from the second device the first BSM before receiving the second BSM; sending an acknowledgment to the second device acknowledging reception of the first BSM, wherein the indicated reset state indicates a first state for disregarding the first instruction and the first device determines to disregard the first instruction based on the indicated reset state indicating the first state; and switching beams based on the second instruction instead of the first instruction after determining to disregard the first instruction. ### Claim 10 (depends on 8) The method of claim 8, wherein the first BSM is unreceived by the first device, the indicated reset state indicates a first state for disregarding the first instruction, and the first device determines to disregard the first instruction based on the indicated reset state indicating the first state, the method further comprising switching beams based on the second instruction instead of the first instruction after determining to disregard the first instruction. ### Claim 11 (depends on 8) The method of claim 8, further comprising: receiving from the second device the first BSM before receiving the second BSM, wherein the indicated reset state is a second state for maintaining execution of the first instruction and the first device determines to maintain execution of the first instruction based on the indicated reset state indicating the second state; switching beams based on the first instruction; and switching beams based on the second instruction subsequent to switching beams based on the first instruction. ### Claim 12 (depends on 8) The method of claim 8, wherein the second BSM is received prior to the first switch time. ### Claim 13 (depends on 8) The method of claim 8, wherein the second BSM is received after the first switch time. ### Claim 14 An apparatus for wireless communication, the apparatus being a first device, comprising: a memory; and at least one processor coupled to the memory and configured to: transmit a first beam switch message (BSM) to a second device, the first BSM including a first instruction for switching beams; select a reset state from a plurality of reset states including a first state for the second device to disregard the first instruction and a second state for the second device to maintain execution of the first instruction; and transmit a second BSM different from the first BSM to the second device before the second device completes execution of the first instruction, the second BSM including a second instruction for switching beams and indicating which reset state is selected, wherein the first instruction includes a first switch time and the second instruction includes a second switch time later than the first switch time. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the at least one processor is further configured to determine that an acknowledgment in response to the transmitted first BSM is unreceived from the second device, wherein the reset state is selected to be the first state based on determining that the acknowledgment in response to the transmitted first BSM is unreceived from the second device. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the first instruction for switching beams indicates to the second device to switch to a first beam set at a first time, the at least one processor being further configured to determine that the second device should switch to a second beam set after maintaining execution of the first instruction, wherein the reset state is selected to be the second state based on determining that the second device should switch to the second beam set after maintaining execution of the first instruction. ### Claim 17 (depends on 14) The apparatus of claim 14, wherein the second BSM indicates which reset state is selected by a reset state flag set to true or false. ### Claim 18 (depends on 14) The apparatus of claim 14, wherein the second BSM indicates one of the reset states by excluding information that one of the reset states was selected. ### Claim 19 (depends on 14) The apparatus of claim 14, wherein the second BSM is transmitted prior to the first switch time. ### Claim 20 (depends on 14) The apparatus of claim 14, wherein the second BSM is transmitted after the first switch time. ### Claim 21 An apparatus for wireless communication, the apparatus being a first device, comprising: a memory; and at least one processor coupled to the memory and configured to: receive a second beam switch message (BSM) from a second device, the second BSM including a second instruction for switching beams and indicating a reset state associated with a first BSM including a first instruction for switching beams, wherein the first BSM is different from the second BSM, wherein the first instruction includes a first switch time and the second instruction includes a second switch time later than the first switch time; and determine whether to disregard the first instruction or to maintain execution of the first instruction based on the indicated reset state. ### Claim 22 (depends on 21) The apparatus of claim 21, wherein the at least one processor is further configured to: receive from the second device the first BSM before receiving the second BSM; send an acknowledgment to the second device acknowledging reception of the first BSM, wherein the indicated reset state indicates a first state for disregarding the first instruction and the at least one processor determines to disregard the first instruction based on the indicated reset state indicating the first state; and switch beams based on the second instruction instead of the first instruction after determining to disregard the first instruction. ### Claim 23 (depends on 21) The apparatus of claim 21, wherein the first BSM is unreceived by the first device, the indicated reset state indicates a first state for disregarding the first instruction, and the at least one processor determines to disregard the first instruction based on the indicated reset state indicating the first state, the at least one processor being further configured to switch beams based on the second instruction instead of the first instruction after determining to disregard the first instruction. ### Claim 24 (depends on 21) The apparatus of claim 21, wherein the at least one processor is further configured to: receive from the second device the first BSM before receiving the second BSM, wherein the indicated reset state is a second state for maintaining execution of the first instruction and the at least one processor determines to maintain execution of the first instruction based on the indicated reset state indicating the second state; switch beams based on the first instruction; and switch beams based on the second instruction subsequent to switching beams based on the first instruction. ### Claim 25 (depends on 21) The apparatus of claim 21, wherein the second BSM is received prior to the first switch time. ### Claim 26 (depends on 21) The apparatus of claim 21, wherein the second BSM is received after the first switch time.