User equipment and method for distributed channel access for D2D communications

• US 9,345,046 B2
• Filed: 11/06/2013
• Issued: 05/17/2016
• Est. Priority Date: 03/29/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Li, Honggang, Li, Qinghua, Khoryaev, Alexey, Zhu, Yuan, Fwu, Jong-Kae
• Primary Examiner(s): Ajibade Akonai, Olumide T
• Assistant Examiner(s): Mastrodonato, Margaret G
• Application Number:
  US14/124,217
• Publication Number:
  US 20140295858A1
• Time in Patent Office: 923 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04B 1/56 with provision for simultaneous communication in two directions
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0619 using feedback from receiving side feedback signaling for adaptive modulation/coding H04L1/0001
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04B 7/088 using beam selection
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/03305 Joint sequence estimation and interference removal joint detection of several desired signals H04L25/03331
• CPC Class Codes: H04L 47/803 Application aware
• CPC Class Codes: H04L 47/83 based on usage prediction
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/0085 : when channel conditions change
• CPC Class Codes: H04L 5/1469 : using time-sharing
• CPC Class Codes: H04L 65/613 : for the control of the source by the destination control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637
• CPC Class Codes: H04L 65/65 : Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/70 : Media network packetisation
• CPC Class Codes: H04L 65/75 : Media network packet handling
• CPC Class Codes: H04L 65/752 : adapting media to network capabilities
• CPC Class Codes: H04L 65/756 : adapting media to device capabilities
• CPC Class Codes: H04L 65/762 : at the source reformatting of additional data in video distribution servers H04N21/2355
• CPC Class Codes: H04L 65/764 : at the destination reformatting of additional data in video clients H04N21/4355
• CPC Class Codes: H04L 65/80 : Responding to QoS
• CPC Class Codes: H04M 1/72457 : according to geographic location
• CPC Class Codes: H04N 21/2402 : Monitoring of the downstream path of the transmission network, e.g. bandwidth available traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876
• CPC Class Codes: H04N 21/8456 : by decomposing the content in the time domain, e.g. in time segments
• CPC Class Codes: H04N 21/8543 : using a description language, e.g. Multimedia and Hypermedia information coding Expert Group [MHEG], eXtensible Markup Language [XML] information retrieval of semistructured data, the underlying structure being taken into account, e.g. mark-up language structure data G06F16/80
• CPC Class Codes: H04W 24/00 : Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/02 : Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 28/0226 : based on location or mobility handoff or reselection H04W36/00; mobile application services making use of the location of users or terminals H04W4/02
• CPC Class Codes: H04W 28/0289 : Congestion control load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/082 : among bearers or channels
• CPC Class Codes: H04W 28/20 : Negotiating bandwidth
• CPC Class Codes: H04W 36/0011 : for data sessions of end-to-end connection
• CPC Class Codes: H04W 36/0022 : for transferring data sessions between adjacent core network technologies
• CPC Class Codes: H04W 36/0072 : of resource information of target access point
• CPC Class Codes: H04W 36/08 : Reselecting an access point
• CPC Class Codes: H04W 36/125 : involving different types of service backbones
• CPC Class Codes: H04W 36/22 : for handling the traffic
• CPC Class Codes: H04W 36/26 : by agreed or negotiated communication parameters
• CPC Class Codes: H04W 4/021 : Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
• CPC Class Codes: H04W 48/06 : based on traffic conditions
• CPC Class Codes: H04W 48/12 : using downlink control channel
• CPC Class Codes: H04W 48/16 : Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/18 : Selecting a network or a communication service
• CPC Class Codes: H04W 56/001 : Synchronization between nodes
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/046 : the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 72/56 : based on priority criteria
• CPC Class Codes: H04W 74/08 : Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 76/11 : Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 76/15 : Setup of multiple wireless link connections
• CPC Class Codes: H04W 8/02 : Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
• CPC Class Codes: H04W 8/06 : Registration at serving network Location Register, VLR or user mobility server
• CPC Class Codes: H04W 8/082 : for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 84/042 : Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/045 : using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 88/10 : adapted for operation in multiple networks, e.g. multi-mode access points
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

Embodiments of a system and method for distributed channel access for device-to-device (D2D) communication in a wireless network are generally described herein. User equipment (UE) may transmit a connection identifier (CID) code at a beginning of a contention window to request channel access for a D2D transmission to a receiving device. Links for D2D transmissions from a transmitting device to a receiving device are identified by a CID that is mapped to a CID code. The UE may receive a bandwidth grant from the receiving device during the contention window, along with bandwidth grants for other CIDs, in an order based on a priority level of the CID. The UE may transmit data after reception of the bandwidth grants in time-frequency resources indicated in an associated one of the bandwidth grants. In some embodiments, spatial-reuse and variable resource size allocation are supported.

Claims

1. User Equipment (UE) arranged to perform device-to-device (D2D) distributed channel access in a 3GPP-LTE network, the UE having physical-layer (PHY) circuitry and media-access control (MAC) layer circuitry arranged to:

transmit a connection identifier (CID) code at a beginning of a contention window to request channel access for a D2D transmission to a receiving device, wherein links for D2D transmissions from a transmitting device to a receiving device are identified by a CID and each CID is mapped to a CID code, wherein CID codes are configured to be transmitted concurrently at the beginning of the contention window by transmitting devices requesting an allocation of channel resources for a D2D transmission;

receive a bandwidth grant from the receiving device, the bandwidth grant being transmitted by the receiving device in response to receipt of a CID code associated with the receiving device, the bandwidth grant being received during the contention window, along with bandwidth grants, transmitted by other receiving devices for other CIDs, the bandwidth grants being received sequentially during the contention window in an order based on a priority level of the CID, the priority level used by receiving devices to allocate bandwidth on a shared data channel to transmitting devices; and

transmit data after reception of the bandwidth grants in time-frequency resources of the shared data channel indicated in an associated one of the bandwidth grants.

11. The UE of claim 1 wherein when acting as a transmitting device, the UE is arranged to:

enter a sleep/low-power state after the contention window;

wake-up to transmit data to an associated receiving device during channel resources indicated in a bandwidth grant; and

return to the sleep/low-power state during data transmissions of other transmitting devices.

12. The UE of claim 1, wherein when the UE is configured for spatial-reuse and is acting as a receiving device, the UE is arranged to determine a recommended transmission power level for a spatial-reuse data transmission by an associated transmitting device,

wherein the spatial-reuse data transmission is transmitted concurrently with data of a higher priority CID on non-orthogonal time-frequency resources, and

wherein the recommend transmission power level for the spatial-reuse transmission is determined based on an interference estimate to help assure a reliable reception of the data by a higher priority receiving device of the spatial-reuse pair.

13. The UE of claim 12 wherein determining the recommended transmission power level for the spatial-reuse data transmission comprises:

estimating a path loss between the transmitting device and the receiving device of the higher priority CID based on the CID code and the bandwidth grant transmitted by the devices having the higher-priority CID, and

wherein the recommended transmission power level for the spatial-reuse data transmission is determined based on the estimated path loss and an interference threshold of the receiving device having the higher-priority CID.

14. The UE of claim 12 wherein when the UE is configured for spatial-reuse and is acting as a receiving device, the receiving device is arranged to:

select a pair of UEs having a lower priority CID as a spatial-reuse pair based on potential interference; and

provide the CID of the selected spatial-reuse pair in the bandwidth grant,

wherein a lower priority receiving device, in response to reception of the bandwidth grant sent by the higher priority receiving device is arranged to transmit a bandwidth grant immediately following the bandwidth grant sent by the higher priority receiving device, and

wherein the lower priority transmitting device is arranged to transmit a spatial-reuse data transmission concurrently with data of the higher priority transmitting device.

2. User Equipment (UE) arranged to perform device-to-device (D2D) distributed channel access in a 3GPP-LTE network, the UE having physical-layer (PHY) circuitry and media-access control (MAC) layer circuitry arranged to:

transmit a connection identifier (CID) code at a beginning of a contention window to request channel access for a D2D transmission to a receiving device, wherein links for D2D transmissions from a transmitting device to a receiving device are identified by CID and each CID is mapped to a CID code;

receive a bandwidth grant from the receiving device, the bandwidth grant being transmitted by the received device in response to receipt of a CID code associated with the receiving device, the bandwidth grant being transmitted during the contention window, along with bandwidth grants for other CIDs, in an order based on a priority level of the CID; and

transmit data after reception of the bandwidth grants in time-frequency resources indicated in an associated one of the bandwidth grants, wherein when acting as a receiving device, the UE is further arranged to;

identify other CID codes received at the beginning of the contention window;

sort the received GID codes based on the priority level to determine when to transmit a bandwidth grant; and

wait for transmission of any other bandwidth grants associated with e priority CIDs before transmitting the bandwidth grant.

3. The UE of claim 2 wherein the UE, when acting as a transmitting device, is arranged to transmit the CID code at a predetermined power level at the beginning of the contention window to request channel access, the predetermined power level determined to allow the CID code to be detected by other devices in addition to the receiving device.

4. The LE of claim 2 wherein the CID code is transmitted concurrently with CID codes of other transmitting devices that are also requesting channel access.

5. The UE of claim 2 wherein the CID code is transmitted on different time-frequency resources than CID codes transmitted by other transmitting devices that are also requesting channel access.

6. The UE of claim 2 wherein the CID codes 204 comprise pseudo-orthogonal sequences, and

wherein the transmitting device is arranged to transmit a CID code on the same time-frequency resources as CID codes that are transmitted by other transmitting devices that are also requesting channel access.

7. The UE of claim 2 wherein when acting as a receiving device, the UE is arranged to:

monitor bandwidth grants transmitted from other receiving devices having higher priority CIDs to determine remaining channel resources for allocation to an associated transmitting device;

grant bandwidth to the transmitting device when sufficient channel resources remain; and

refrain from granting bandwidth to the transmitting device when insufficient channel resources remain.

8. The UE of claim 7 wherein when acting as a receiving device having a highest priority CID, allocate channel resources prior to allocation of channel resources by other receiving devices, and

wherein when acting as a receiving device and when associated with a lower priority CID, the UE is arranged to refrain from transmitting a bandwidth grant when insufficient channel resources are available after allocation of channel resources by receiving devices with higher priority CIDs.

9. The UE of claim 8 wherein when acting as a receiving device, the UE is arranged to determine a recommended transmission power level for transmission of data based, at least in part, on signal strengths of the CID codes received from one or more transmitting devices, and

wherein the receiving device is to provide the recommended transmission power level to the associated transmitting device in a transmitted bandwidth grant.

10. The HE of claim 9 wherein when acting as a receiving device, the UE is arranged to include bandwidth allocation parameters including at least one of a starting point or offset value, a resource allocation size and the recommended transmission power level in a transmitted bandwidth grant, and

when spatial-reuse pairing is performed, a CID of a spatial-reuse pair and optionally bandwidth allocation parameters for the spatial-reuse pair are piggybacked in the transmitted bandwidth grant.

15. A method performed by user equipment (UE) for distributed channel access for device-to-device (D2D) communication in a 3GPP LTE network, the method comprising:

transmitting a connection identifier (CID) code at a beginning of a contention window to request channel access for a D2D transmission to a receiving device, wherein links for D2D transmissions from a transmitting device to a receiving device are identified by CID and each CID is mapped to a CID code, wherein CID codes are configured to be transmitted concurrently at the beginning of the contention window by transmitting devices requesting an allocation of channel resources for a D2D transmission;

receiving a bandwidth grant from the receiving device, the bandwidth grant being transmitted by the receiving device in response to receipt of a CID code associated with the receiving device, the bandwidth grant being received during the contention window, along with bandwidth grants, transmitted by other receiving devices, for other CIDs, the bandwidth grants being received sequentially during the contention window in an order based on a priority level of the CID, the priority level used by receiving devices to allocate bandwidth on a shared data channel to transmitting devices; and

transmitting data after reception of the bandwidth grants in time-frequency resources of the shared data channel indicated in an associated one of the bandwidth grants.

16. The method of claim 15 wherein when acting as a receiving device, the method further includes:

identifying other CID codes received at the beginning of the contention window;

sorting the received CID codes based on the priority level to determine when to transmit a bandwidth grant; and

waiting for transmission of any other bandwidth grants associated with higher priority CIDs before transmitting the bandwidth grant.

17. The method of claim 16 wherein when acting as a receiving device, the method further includes monitoring bandwidth grants transmitted from other receiving devices having higher priority CIDs to determine remaining channel resources for allocation to an associated transmitting device;

granting bandwidth to the transmitting device when sufficient channel resources remain; and

refraining from granting bandwidth to the transmitting device when insufficient channel resources remain.

18. The method of claim 17 wherein when acting as a receiving device having a highest priority CID, the method includes allocating channel resources prior to allocation of channel resources by other receiving devices, and

wherein when acting as a receiving device and when associated with a lower priority CII), the method includes refraining from transmitting a bandwidth grant when insufficient channel resources are available after allocation of channel resources by receiving devices with higher priority CIDs.

19. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for distributed channel access for device-to-device (D2D) communication, the operations to configure the a User Equipment (UE) to:

transmit a connection identifier (CID) code at a beginning of a contention window to request channel access for a D2D transmission to a receiving device, wherein links for D2D transmissions from a transmitting device to a receiving device are identified by CID and each CID is mapped to a CID code, wherein CID codes are configured to be transmitted concurrently at the beginning of the contention window by transmitting devices requesting an allocation of channel resources for a D2D transmission;

receive a bandwidth grant from the receiving device, the bandwidth grant being transmitted by the receiving device in response to receipt of a CID code associated with the receiving device, the bandwidth grant being received during the contention window, along with bandwidth grants transmitted by other receiving devices for other CDs, the bandwidth grants being received sequentially during the contention window in an order based on a priority level of the CID, the priority level used b receiving devices to allocate bandwidth on a shared data channel to transmitting devices; and

transmit data after reception of the bandwidth grants in time-frequency resources of the shared data channel indicated in an associated one of the bandwidth grants.

20. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for distributed channel access for device-to-device (D2D) communication, the operations to configure the one or more processors for:

transmitting a connection identifier (CID) code at a beginning of a contention window to request channel access for a D2D transmission to a receiving device, wherein links for D2D transmissions from a transmitting device to a receiving device are identified by CID and each CID is mapped to a CID code;

receiving a bandwidth grant from the receiving device, the bandwidth grant being transmitted by the received device in response to receipt of a CID code associated with the receiving device, the bandwidth grant being transmitted during the contention window, along with bandwidth grants for other CIDs, in an order based on a priority level of the CID; and

transmitting data after reception of the bandwidth grants in time-frequency resources indicated in an associated one of the bandwidth grants,

wherein when acting as a receiving device, the one or more processors are arranged to;

identify other CID codes received at the beginning of the contention window;

sort the received CID codes based on the priority level to determine when to transmit a bandwidth grant; and

wait for transmission of any other bandwidth grants associated with higher priority CIDs before transmitting the bandwidth grant.

21. An apparatus of User Equipment (UE) arranged to perform device-to-device (D2D) distributed channel access in a 3GPP-LTE network, the apparatus comprising hardware processing circuitry and transceiver circuitry arranged to:

receive a plurality of connection identifier (CID) codes from transmitting devices at a beginning of a contention window, each of the CII) codes indicating a request for channel access for a D2D transmission, wherein links for D2D transmissions from a transmitting device to a receiving device are identified by a CID and each CID is mapped to a CID code, wherein CID codes are configured to be transmitted concurrently at the beginning of the contention window by transmitting devices to request an allocation of channel resources for a D2D transmission;

transmit a bandwidth grant to a transmitting device, the bandwidth grant being transmitted in response to receipt of a CID code associated with the transmitting device, the bandwidth grant being transmitted during the contention window, along with bandwidth grants, transmitted by other receiving devices, for other CIDs, the bandwidth grants being transmitted sequentially by the receiving devices during the contention window in an order based on a priority level of the CID, wherein prior to transmission of the bandwidth grant, the UE, when operating as a receiving device, is to allocate bandwidth on a shared data channel after receipt of any bandwidth grants associated with higher priority CIDs; and

receive data, after transmission of the bandwidth grant, in time-frequency resources of the shared data channel indicated in an associated one of the bandwidth grants.