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Signal designs for D2D subframes

專利號(hào)
US11140710B2
公開日期
2021-10-05
申請(qǐng)人
Apple Inc.（US CA Cupertino）
發(fā)明人
Debdeep Chatterjee; Seunghee Han; Gang Xiong; Huaning Niu
IPC分類
H04W74/04; H04L1/00; H04L29/08; H04L29/06; H04W36/00; H04L5/00; H04L5/14; H04W72/04; H04W52/02; H04L1/18; H04W40/30; H04L12/825; H04W28/02; H04W16/14; H04B7/26; H04L27/26; H04W72/02; H04W76/28; H04W76/27; H04W80/06; H04W88/06; H04W88/10; H04W84/12
技術(shù)領(lǐng)域
symbol,subframe,d2d,ue,may,agc,cp,in,circuitry,guard
地域： CA CA Cupertino

摘要

Embodiments of the present disclosure describe apparatuses and methods for signal designs for device-to-device (D2D) subframes. Various embodiments may include a UE with a radio transceiver to communicate with another UE via D2D communications. The UE may further include processing circuitry to generate a cyclic prefix (CP) for a first or second symbol of a D2D subframe at an orthogonal frequency division multiplexing (OFDM) resource block or a single-carrier frequency-division multiple access (SC-FDMA) resource block. Other embodiments may be described and/or claimed.

說明書

CROSS REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No. 15/492,844, filed Apr. 20, 2017, entitled “SIGNAL DESIGNS FOR D2D SUBFRAMES,” which is a continuation of U.S. patent application Ser. No. 14/498,276, filed Sep. 26, 2014, entitled “SIGNAL DESIGNS FOR D2D SUBFRAMES,” which claims priority to U.S. Provisional Patent Application No. 61/909,938, filed Nov. 27, 2013, entitled “ADVANCED WIRELESS COMMUNICATION SYSTEMS AND TECHNIQUES,” disclosures of which are hereby incorporated by reference in their entireties.

FIELD

Embodiments of the present disclosure generally relate to the field of wireless communication, and more particularly, to apparatuses and methods for signal designs for device-to-device (D2D) subframes.

BACKGROUND

The background description provided herein is for generally presenting the context of the disclosure. Unless otherwise indicated herein, the materials described in this section are not prior art to the claims in this application and are not admitted to be prior art or suggestions of the prior art, by inclusion in this section.

D2D applications may provide a scalable and universal framework for connecting proximity peers. There are different technology solutions for D2D applications, e.g., based on WiFi Direct or Near Field Communication (NFC) technology. A special solution that relates to the 3rd Generation Partnership Project (3GPP) is Proximity Services (ProSe) as well as Long-Term Evolution (LTE) Direct.

權(quán)利要求

1
What is claimed is:1. A user equipment (UE), comprising:one or more antennas; andcommunication circuitry, coupled with the one or more antennas, the communication circuitry to transmit, via at least one of the one or more antennas, a device-to-device (D2D) subframe to another UE at a Timing (T) ahead of a downlink reference time (T1) with a Timing Advance (TA), where T=(T1?TA) and the downlink reference time is associated with a serving cell provided by a base station with which the UE is communicatively coupled, andwherein the D2D subframe does not include a last data symbol of the subframe.2. The UE of claim 1, wherein the Timing Advance (TA) is at least 624 basic time units, where one basic time unit equals to 1/30720000 seconds.3. The UE of claim 1, wherein the communication circuitry is to communicate with the other UE via a time division duplex (TDD) deployment.4. The UE of claim 1, wherein the last data symbol not transmitted by the communication circuitry is a Single Carrier Frequency-Division Multiple Access (SC-FDMA) symbol.5. The UE of claim 1, wherein the communication circuitry is to communicate with the other UE via D2D communication without involvement of the base station.6. The UE of claim 1, wherein the communication circuitry is to receive a first value from the base station, andwherein a processing circuitry included in the UE is to determine the Timing Advance (TA) based on the first value.7. The UE of claim 1, wherein the Timing Advance (TA) equals (N_TA+624)*basic time units (Ts), andwherein the N_TA is predetermined by the base station.8. The UE of claim 7, wherein the UE is to schedule a switch from reception to transmission within a time period of the TA.9. A user equipment (UE), comprising:one or more antennas; andcommunication circuitry, coupled with the one or more antennas, the communication circuitry to receive, via at least one of the one or more antennas, a device-to-device (D2D) subframe from another UE at a Timing (T) ahead of a downlink reference time (T1) with a Timing Advance (TA), where T=(T1?TA) and the downlink reference time is associated with a serving cell provided by a base station with which the UE is communicatively coupled, andwherein the D2D subframe does not include a last data symbol of the subframe.10. The UE of claim 9, wherein the Timing Advance (TA) is at least 624 basic time units, where one basic time unit equals to 1/30720000 seconds.11. The UE of claim 9, wherein the communication circuitry is to communicate with the other UE via a time division duplex (TDD) deployment.12. The UE of claim 9, wherein the last data symbol is a Single Carrier Frequency-Division Multiple Access (SC-FDMA) symbol.13. The UE of claim 9, wherein the communication circuitry is to communicate with the other UE via D2D communication without involvement of the base station.14. The UE of claim 9, wherein the Timing Advance (TA) equals (N_TA+624)*basic time units (Ts), andwherein the N_TA is predetermined by the base station.15. The UE of claim 9, wherein the UE is to schedule a switch from reception to transmission within a time period of the TA.16. A processor for a user equipment (UE), the processor comprising:circuitry configured to execute one or more instructions to perform operations comprising:communicating, via one or more antennas of the UE, a device-to-device (D2D) subframe from another UE at a Timing (T) ahead of a downlink reference time (T1) with a Timing Advance (TA), where T=(T1?TA) and the downlink reference time is associated with a serving cell provided by a base station with which the UE is communicatively coupled, andwherein the D2D subframe does not include a last data symbol of the subframe.17. The processor of claim 16, wherein the Timing Advance (TA) is at least 624 basic time units, where one basic time unit equals to 1/30720000 seconds.18. The processor of claim 16, wherein the circuitry is to communicate with the other UE via a time division duplex (TDD) deployment, andwherein the last data symbol is a Single Carrier Frequency-Division Multiple Access (SC-FDMA) symbol.19. The processor of claim 16, wherein the Timing Advance (TA) equals (N_TA+624)*basic time units (Ts), andwherein the N_TA is predetermined by the base station.20. The processor of claim 16, wherein the processor is to schedule a switch from reception to transmission within a time period of the TA.
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