METHOD AND DEVICE FOR ALLOCATING RESOURCE UNITS USING LEFTOVER TONES IN WIRELESS LAN

• US 20170359824A1
• Filed: 11/24/2015
• Published: 12/14/2017
• Est. Priority Date: 11/24/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: CHOI, Jinsoo, CHO, Hangyu, LEE, Wookbong
• Granted Patent: US 10,085,263 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Disclosed are a method and a device for allocating resource units using leftover tones in a wireless LAN. The method for allocating resource units using leftover tones in a wireless LAN may comprise the steps of: an AP generating PPDUs to be transmitted to a plurality of STAs; and the AP transmitting the PPDUs to the plurality of STAs on all frequency bands, wherein the PPDUs are transmitted from each of a plurality of resource unit sets respectively allocated to each of the plurality of STAs, wherein each of the plurality of resource unit sets includes a first resource unit set and a second resource unit set, wherein the first resource unit set includes at least one resource unit, the second resource unit set includes one tone design resource unit, and wherein the tone design resource unit may include at least one other resource unit and at least one additional tone unit.

Claims

1. A method for allocating resource units using leftover tones in a wireless LAN, comprising:

generating, by an access point (AP), a PHY layer protocol data unit (PPDU) that is to be transmitted to a plurality of stations (STAs); and

transmitting, by the AP, the PPDU to the plurality of STAs within an entire frequency bandwidth,

wherein the PPDU is transmitted from each of a plurality of resource unit groups being allocated to each of the plurality of STAs,

wherein each of the plurality of resource unit groups includes a first resource unit group and a second resource unit group,

wherein the first resource unit group includes at least one resource unit,

wherein the second resource unit group includes one tone design resource unit,

wherein the tone design resource unit includes at least one other resource unit and at least one additional tone unit, and

wherein the at least one additional tone unit includes leftover tones remaining after allocating the at least one resource unit and the at least one other resource unit within the entire frequency band.

2. The method of claim 1, wherein a number of the at least one additional tone unit is linearly increased in accordance with an increase in a number of the at least one other resource unit.

3. The method of claim 2, wherein a number of the at least one additional tone unit corresponds to a fixed value being independent from the increase in the number of the at least one other resource unit.

4. The method of claim 1, wherein the second resource unit group is allocated to an allocatable location available for allocating a tone design resource unit among a predetermined plurality of allocatable locations available for allocating tone design resource units, and

wherein the plurality of allocatable locations available for allocating tone design resource units are determined based on a location of the at least one additional tone unit within the entire bandwidth.

5. The method of claim 1, wherein a size of the entire bandwidth corresponds to 20 MHz,

wherein each of the at least one resource unit corresponds to a 26-tone resource unit,

wherein each of the at least one other resource unit corresponds to a 26-tone resource unit, and

wherein each of the at least one additional tone unit corresponds to a 4-tone leftover tone.

6. An access point (AP) allocating resource units using leftover tones in a wireless LAN, comprising:

a radio frequency (RF) unit transmitting and receiving radio signals; and

a processor being operatively connected to the RF unit,

wherein the processor is configured;

to generate a PHY layer protocol data unit (PPDU) that is to be transmitted to a plurality of stations (STAs), and

to transmit the PPDU to the plurality of STAs within an entire frequency bandwidth,

wherein the PPDU is transmitted from each of a plurality of resource unit groups being allocated to each of the plurality of STAs,

wherein each of the plurality of resource unit groups includes a first resource unit group and a second resource unit group,

wherein the first resource unit group includes at least one resource unit,

wherein the second resource unit group includes one tone design resource unit,

wherein the tone design resource unit includes at least one other resource unit and at least one additional tone unit, and

wherein the at least one additional tone unit includes leftover tones remaining after allocating the at least one resource unit and the at least one other resource unit within the entire frequency band.

7. The AP of claim 6, wherein a number of the at least one additional tone unit is linearly increased in accordance with an increase in a number of the at least one other resource unit.

8. The AP of claim 7, wherein a number of the at least one additional tone unit corresponds to a fixed value being independent from the increase in the number of the at least one other resource unit.

9. The AP of claim 6, wherein the second resource unit group is allocated to an allocatable location available for allocating a tone design resource unit among a predetermined plurality of allocatable locations available for allocating tone design resource units, and

wherein the plurality of allocatable locations available for allocating tone design resource units are determined based on a location of the at least one additional tone unit within the entire bandwidth.

10. The AP of claim 6, wherein a size of the entire bandwidth corresponds to 20 MHz,

wherein each of the at least one resource unit corresponds to a 26-tone resource unit,

wherein each of the at least one other resource unit corresponds to a 26-tone resource unit, and

wherein each of the at least one additional tone unit corresponds to a 4-tone leftover tone.