# US 10,375,718 B2 · Adaptive resource management for robust communication in new radio > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,718 B2 - Document ID: US10375718B2 - Status: Granted - Kind: B2 - Application number: 15/450,216 - Filed: 2017-03-06 - Published: 2018-02-15 - Granted: 2019-08-06 - Earliest claimed: 2016-08-11 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Alexandros Manolakos; Jing Jiang; Seyong Park; Hao Xu; Wanshi Chen; Wei Zeng; Peter Gaal; Tingfang Ji - Web page: https://patentgrep.com/patent/US10375718B2 ## CPC - H04L 27/26025: {Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003)} - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 1/0007: {by modifying the frame length} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0082: {at predetermined intervals} - H04L 25/0202: {Channel estimation} - H04L 25/0224: {using sounding signals} - H04L 27/2601: {Multicarrier modulation systems} - H04L 27/2613: {Structure of the reference signals} - H04W 52/18: TPC being performed according to specific parameters - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0023: {Time-frequency-space} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04W 28/18: Negotiating wireless communication parameters - 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) ## Abstract The present disclosure provides for adaptive resource management in new radio operations that favors the usage of resources for pilot signals and channel estimation in the transition slots of a slot burst, and the transmission of data in the subsequent slots of the slot burst. A device such as a user equipment (UE) and/or a base station may determine that the UE is operating in a transition state. The device may adapt a first numerology including a first number of symbols per slot used for transmission in the transition slots during the transition state, to a second scaled numerology including a second number of symbols per slot used for transmission in the subsequent slots after the transition state. A ratio of reference signal symbols to data symbol symbols may be greater in the transition slots than in the subsequent slots. ## Claims ### Claim 1 A method of resource adaptation for wireless communications using a bursty transmission pattern, comprising: determining, by a processor, that a user equipment (UE) is operating in a transition state; transmitting, using a first numerology including a first number of symbols per slot, a first radio-frequency transmission having a first ratio of reference signal symbols to data symbols, for at least one transition slot while the UE is operating in the transition state; adapting, by the processor, the first numerology, in a subsequent slot after the transition state, to a second scaled numerology including a second number of symbols per slot, according to a defined adaptation schedule defining a fixed number of slots in the transition state; adjusting a waveform of a symbol transmitted in the at least one transition slot to a different waveform in the subsequent slot, wherein in the at least one transition slot, the symbol carries a first sequence or a second sequence orthogonal to the first sequence, and wherein in the subsequent slot the symbol carries the first sequence or the opposite of the first sequence; and transmitting, using the second scaled numerology, a second radio-frequency transmission having a second ratio of reference signal symbols to data symbols, in the subsequent slot, wherein the first ratio of reference signal symbols to data symbols is greater than the second ratio of reference signal symbols to data symbols. ### Claim 2 (depends on 1) The method of claim 1, further comprising: adapting, during the transition state, the first numerology to a third scaled numerology including a third number of symbols per slot; and transmitting, during the transition state, a third transmission having a third ratio of reference signal symbols to data symbols, wherein the third ratio is less than the first ratio and greater than the second ratio. ### Claim 3 (depends on 1) The method of claim 1, wherein the first transmission and the second transmission are between the UE and a serving base station. ### Claim 4 (depends on 1) The method of claim 1, further comprising reducing a base transmission power in the subsequent slot according to a predetermined schedule. ### Claim 5 (depends on 1) The method of claim 1, further comprising: receiving a transmission power control command in the transition state; adjusting a transmission power by a first value based on the transmission power control command; receiving the same transmission power control command in the subsequent slot; and adjusting the transmission power by a second value based on the transmission power control command, wherein the first value is greater than the second value. ### Claim 6 (depends on 1) The method of claim 1, wherein the first transmission and the second transmission are based on single carrier frequency division multiple access (SC-FDMA). ### Claim 7 (depends on 1) The method of claim 1, wherein the reference signal symbols are identical reference symbols transmitted consecutively and do not include a cyclic prefix. ### Claim 8 (depends on 1) The method of claim 1, wherein the waveform of the symbol in the at least one transition slot allows for noncoherent demodulation of the first transmission independent of a subcarrier phase, wherein the waveform of the symbol in the subsequent slot allows for coherent demodulation of the second transmission based on a subcarrier phase estimated based on the first transmission. ### Claim 9 (depends on 1) The method of claim 1, wherein the first transmission and the second transmission are based on orthogonal frequency division multiple access (OFDMA), wherein in the at least one transition slot a first ratio of reference resource elements to data resource elements is used, wherein in the subsequent slot a second ratio of reference resource elements to data resource elements is used, and wherein the first ratio is greater than the second ratio. ### Claim 10 (depends on 1) The method of claim 1, wherein determining that the UE is operating in the transition state includes determining that the UE has transitioned to a connected mode. ### Claim 11 (depends on 1) The method of claim 1, wherein determining that the UE is operating in the transition state includes determining that the UE has transitioned from a discontinuous reception mode. ### Claim 12 (depends on 1) The method of claim 1, wherein determining that the UE is operating in the transition state includes determining that the UE is experiencing changing channel conditions. ### Claim 13 (depends on 1) The method of claim 1, wherein determining that the UE is operating in the transition state includes determining that a channel estimation filter is unreliable. ### Claim 14 An apparatus for resource adaptation in wireless communications using a bursty transmission pattern, comprising: a processor; a memory coupled to the processor, wherein the memory includes instructions executable by the processor to: determine that a user equipment (UE) is operating in a transition state; transmit, using a first numerology including a first number of symbols per slot, a first radio-frequency transmission having a first ratio of reference signal symbols to data symbols, for at least one transition slot while the UE is operating in the transition state; adapt the first numerology, in a subsequent slot after the transition state, to a second scaled numerology including a second number of symbols per slot according to a defined adaptation schedule defining a fixed number of slots in the transition state; adjust a waveform of a symbol transmitted in the at least one transition slot to a different waveform in the subsequent slot, wherein in the at least one transition slot, the symbol carries a first sequence or a second sequence orthogonal to the first sequence, and wherein in the subsequent slot the symbol carries the first sequence or the opposite of the first sequence; and transmit, using the second scaled numerology, a second radio-frequency transmission having a second ratio of reference signal symbols to data symbols, in the subsequent slot, wherein the first ratio of reference signal symbols to data symbols is greater than the second ratio of reference signal symbols to data symbols. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein the memory includes instructions executable by the processor to: adapt, during the transition state, the first numerology to a third scaled numerology including a third number of symbols per slot; and transmit, during the transition state, a third transmission having a third ratio of reference signal symbols to data symbols, wherein the third ratio is less than the first ratio and greater than the second ratio. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the apparatus is the UE, wherein the first transmission and the second transmission are from the UE to a serving base station. ### Claim 17 (depends on 14) The apparatus of claim 14, wherein the memory includes instructions executable by the processor to reduce a base transmission power in the subsequent slot according to a predetermined schedule. ### Claim 18 (depends on 14) The apparatus of claim 14, wherein the memory includes instructions executable by the processor to receive a transmission power control command in the transition state; adjust a transmission power by a first value based on the transmission power control command; receive the same transmission power control command in the subsequent slot; and adjust the transmission power by a second value based on the transmission power control command, wherein the first value is greater than the second value. ### Claim 19 (depends on 14) The apparatus of claim 14, wherein the first transmission and the second transmission are based on single carrier frequency division multiple access (SC-FDMA). ### Claim 20 (depends on 14) The apparatus of claim 14, wherein the reference signal symbols are identical reference symbols transmitted consecutively and do not include a cyclic prefix. ### Claim 21 (depends on 14) The apparatus of claim 14, wherein the waveform of the symbol in the at least one transition slot allows for noncoherent demodulation of the first transmission independent of a subcarrier phase, wherein the waveform of the symbol in the subsequent slot allows for coherent demodulation of the second transmission based on a subcarrier phase estimated based on the first transmission. ### Claim 22 (depends on 14) The apparatus of claim 14, wherein the first transmission and the second transmission are based on orthogonal frequency division multiple access (OFDMA), wherein in the transition slot a first ratio of reference resource elements to data resource elements is used, wherein in the subsequent slot a second ratio of reference resource elements to data resource elements is used, and wherein the first ratio is greater than the second ratio. ### Claim 23 (depends on 14) The apparatus of claim 14, wherein the memory includes instructions executable by the processor to determine that the UE is operating in the transition state by determining that the UE has transitioned to a connected mode. ### Claim 24 (depends on 14) The apparatus of claim 14, wherein the memory includes instructions executable by the processor to determine that the UE is operating in the transition state by determining that the UE has transitioned from a discontinuous reception mode. ### Claim 25 (depends on 14) The apparatus of claim 14, wherein the memory includes instructions executable by the processor to determine that the UE is operating in the transition state by determining that the UE is experiencing changing channel conditions. ### Claim 26 (depends on 14) The apparatus of claim 14, wherein the memory includes instructions executable by the processor to determine that the UE is operating in the transition state by determining that a channel estimation filter is unreliable. ### Claim 27 An apparatus for resource adaptation in wireless communications having a bursty transmission pattern, comprising: means for determining that a user equipment (UE) is operating in a transition state; means for transmitting, using a first numerology including a first number of symbols per slot, a first radio-frequency transmission having a first ratio of reference signal symbols to data symbols, for at least one transition slot while the UE is operating in the transition state; means for adapting the first numerology, in a subsequent slot after the transition state, to a scaled numerology including a second number of symbols per slot, according to a defined adaptation schedule defining a fixed number of slots in the transition state, wherein the means for adapting is configured to adjust a waveform of a symbol transmitted in the at least one transition slot to a different waveform in the subsequent slot, wherein in the at least one transition slot, the symbol carries a first sequence or a second sequence orthogonal to the first sequence, and wherein in the subsequent slot the symbol carries the first sequence or the opposite of the first sequence, and wherein the means for transmitting is configured to transmit, using the scaled numerology, a second radio-frequency transmission having a second ratio of reference signal symbols to data symbols, in the subsequent slot, wherein the first ratio of reference signal symbols to data symbols is greater than the second ratio of reference signal symbols to data symbols. ### Claim 28 A non-transitory computer readable medium for resource adaptation in wireless communications having a bursty transmission pattern comprising code for: determining that a user equipment (UE) is operating in a transition state; transmitting, using a first numerology including a first number of symbols per slot, a first radio-frequency transmission having a first ratio of reference signal symbols to data symbols, for at least one transition slot while the UE is operating in the transition state; adapting the first numerology, in a subsequent slot after the transition state, to a scaled numerology including a second number of symbols per slot, according to a defined adaptation schedule defining a fixed number of slots in the transition state; adjusting a waveform of a symbol transmitted in the at least one transition slot to a different waveform in the subsequent slot, wherein in the at least one transition slot, the symbol carries a first sequence or a second sequence orthogonal to the first sequence, and wherein in the subsequent slot the symbol carries the first sequence or the opposite of the first sequence; and transmitting, using the scaled numerology, a second radio-frequency transmission having a second ratio of reference signal symbols to data symbols, in the subsequent slot, wherein the first ratio of reference signal symbols to data symbols is greater than the second ratio of reference signal symbols to data symbols.