Method and devices for selecting transmission resource in wireless access system supporting non-licensed band

• US 10,517,070 B2
• Filed: 11/02/2015
• Issued: 12/24/2019
• Est. Priority Date: 10/31/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Hanbyul, Yi, Yunjung, Yang, Suckchel
• Primary Examiner(s): Musa, Abdelnabi O
• Application Number:
  US15/517,902
• Publication Number:
  US 20190098605A1
• Time in Patent Office: 1,513 Days
• CPC Class Codes: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04J 13/0059 CAZAC [constant-amplitude and zero auto-correlation]
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 25/0224 using sounding signals
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• 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 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• 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 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Abstract

The present invention relates to a wireless access system supporting a non-licensed band and provides a method for selecting an uplink transmission resource and devices for same. A method for selecting the uplink transmission resource in the wireless access system, according to one embodiment of the present invention, may comprise the steps of: receiving, from an eNB, information related to a resource selection area; selecting an uplink transmission resource in a cell in which the non-licensed band is formed for the resource selection area according to the information related to the resource selection area; and transmitting a signal through the selected uplink transmission resource, wherein the uplink transmission resource in the resource selection area may be selected without receiving an uplink grant from the eNB.

Claims

1. A method of selecting an uplink transmission resource, which is selected by a user equipment (UE) in a wireless access system supporting an unlicensed band, the method comprising:

receiving, from an evolved NodeB (eNB), first information related to a resource selection area and second information on a reservation resource configuration for the unlicensed band;

selecting an uplink transmission resource among resources of the unlicensed band in a time interval, based on the resource selection area; and

transmitting a signal via the selected uplink transmission resource,

wherein the time interval for the resource selection area is determined based on a reservation resource period (RRP),

wherein the RRP is determined based on the reservation resource configuration, and used for an eNB-scheduling based signal transmission, and

wherein the uplink transmission resource is selected from the resource selection area without receiving an uplink grant from the eNB.

2. The method of claim 1, wherein the time interval for the resource selection area is a prescribed time interval within the RRP.

3. The method of claim 1, wherein the time interval for the resource selection area is a prescribed time interval other than the RRP.

4. The method of claim 3, wherein the time interval for the resource selection area starts at t+a and ends at t+b,

wherein a and b are predetermined values configured by a value equal to or greater than 0, and

wherein t is a timing that the RRP ends.

5. The method of claim 3, wherein the signal is transmitted according to synchronization obtained from the eNB.

6. The method of claim 3, wherein the signal is transmitted based on a parameter transmitted from the eNB.

7. The method of claim 3, further comprising:

performing carrier sensing on the resource selection area; and

when a specific resource is in an idle state in the resource selection area, selecting the specific resource as the uplink transmission resource.

8. The method of claim 7, further comprising:

repeating the carrier sensing for selecting the specific resource as many as a first backoff counter,

wherein when the idle state is repeated as many as the first backoff counter, the specific resource is determined as being in the idle state.

9. The method of claim 8, wherein the specific resource is configured based on carrier sensing of the eNB.

10. The method of claim 9,

wherein the carrier sensing of the eNB for the specific resource is repeated as many as a second backoff counter, and

wherein the second backoff counter has a value smaller than a value of the first backoff counter.

11. A User Equipment (UE) selecting an uplink transmission resource in a wireless access system supporting an unlicensed band, the UE comprising:

a transmitter;

a receiver; and

a processor coupled to the transmitter and the receiver, the processor configured to;

control the receiver to receive, from an evolved NodeB (eNB), first information related to a resource section area and second information on a reservation resource configuration for the unlicensed band;

select an uplink transmission resource among resources of the unlicensed band in a time interval, based on the resource selection area; and

control the transmitter to transmit a signal via the selected uplink transmission resource,

wherein the time interval for the resource selection area is determined based on a reservation resource period (RRP),

wherein the RRP is determined based on the reservation resource configuration, and used for an eNB-scheduling based signal transmission, and

wherein the uplink transmission resource is selected from the resource selection area without receiving an uplink grant from the eNB.