# US 10,771,206 B2 · Method and apparatus for performing fractional subframe transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,771,206 B2 - Document ID: US10771206B2 - Status: Granted - Kind: B2 - Application number: 16/041,313 - Filed: 2018-07-20 - Published: 2019-01-03 - Granted: 2020-09-08 - Earliest claimed: 2017-07-07 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Lei Jiang; Hongmei Liu; Gang Wang; Zhennian Sun; Chuangxin Jiang - Web page: https://patentgrep.com/patent/US10771206B2 ## CPC - H04L 5/003: {Arrangements for allocating sub-channels of the transmission path} - H04L 5/0023: {Time-frequency-space} - 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 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 48/12: using downlink control channel - H04W 52/02: Power saving arrangements - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 74/002: {Transmission of channel access control information} - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04W 74/0816: with collision avoidance - 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 Embodiments of the disclosure provide a method and apparatus for performing fractional subframe transmission. The method may comprise: in response to detecting that a channel becomes available, determining a target position from at least one potential position predefined in a subframe; and performing the fractional subframe transmission from the target position. ## Claims ### Claim 1 A method of performing transmission, the method comprising: sending to a user equipment (UE) at one of at least one of predetermined position(s) within a subframe n, an information indicating a value of how many symbols are used for a downlink signal transmitted in a subframe n+1 in an unlicensed spectrum, wherein the value of how many symbols corresponds to less than a full subframe; and performing transmission of the downlink signal in the subframe n+1. ### Claim 2 (depends on 1) The method of claim 1, further comprising: performing the transmission in a channel after sensing the channel to be idle. ### Claim 3 (depends on 1) The method of claim 1, further comprising: sending to the UE, second information indicating the at least one of predetermined position(s). ### Claim 4 (depends on 3) The method of claim 3, wherein the at least one of predetermined position(s) are periodical. ### Claim 5 A method of performing reception, the method comprising: receiving from a base station (BS) at one of at least one of predetermined position(s) within a subframe n, an information indicating a value of how many symbols are used for a downlink signal transmitted in a subframe n+1 in an unlicensed spectrum, wherein the value of how many symbols corresponds to less than a full subframe; and receiving the downlink signal in the subframe n+1. ### Claim 6 (depends on 5) The method of claim 5, wherein the receiving occurs in a channel after the channel is sensed to be idle. ### Claim 7 (depends on 5) The method of claim 5, further comprising: receiving from the BS, second information indicating the at least one of predetermined position(s) of the reception. ### Claim 8 (depends on 7) The method of claim 7, wherein the at least one of predetermined position(s) of the reception are periodical. ### Claim 9 A base station apparatus comprising: a receiver; and a transmitter, wherein the transmitter is configured to: send to a user equipment (UE) at one of at least one of predetermined position(s) within a subframe n, an information indicating a value of how many symbols are used for a downlink signal transmitted in a subframe n+1 in an unlicensed spectrum, wherein the value of how many symbols corresponds to less than a full subframe, and perform transmission of the downlink signal in the subframe n+1. ### Claim 10 (depends on 9) The base station apparatus of claim 9, wherein the transmitter is further configured to perform the transmission in a channel after sensing the channel to be idle. ### Claim 11 (depends on 9) The base station apparatus of claim 9, wherein the transmitter is further configured: to send to the UE, second information indicating possible starting positions of the transmission. ### Claim 12 (depends on 11) The method of claim 11, wherein the at least one of predetermined position(s) of the transmission are periodical. ### Claim 13 A user equipment (UE) apparatus comprising: a transmitter; and a receiver, wherein the receiver is configured to: receive from a base station at one of at least one of predetermined position(s) within a subframe n, an information indicating a value of how many symbols are used for a downlink signal transmitted in a subframe n+1 in an unlicensed spectrum, wherein the value of how many symbols corresponds to less than a full subframe; and receive the downlink signal in the subframe n+1. ### Claim 14 (depends on 13) The UE apparatus of claim 13, wherein the transceiver is further configured to: perform the downlink transmission in a channel after the channel is sensed to be idle. ### Claim 15 (depends on 13) The UE apparatus of claim 13, wherein the receiver is further configured to: receive from the base station, second information indicating the at least one of predetermined position(s) of the reception. ### Claim 16 (depends on 15) The UE apparatus of claim 15, wherein the at least one of predetermined position(s) of the reception are periodical.