# US 8,570,945 B2 · Method and apparatus for transmitting data in DLS wireless network

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- Number: US 8,570,945 B2
- Document ID: US8570945B2
- Status: Granted
- Kind: B2
- Application number: 12/922,266
- Filed: 2009-03-13
- Published: 2011-01-13
- Granted: 2013-10-29
- Earliest claimed: 2008-03-14
- Assignees: LG Electronics Inc.
- Applicants: Yong Ho Seok
- Inventors: Yong Ho Seok
- Web page: https://patentgrep.com/patent/US8570945B2

## CPC

- H04W 76/14: Direct-mode setup
- H04W 40/22: using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
- H04W 40/12: based on transmission quality or channel quality
- H04W 88/04: adapted for relaying to or from another terminal or user
- Y02D 30/70: in wireless communication networks
- 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

A method for transmitting data in a direct link setup (DLS) wireless network and an apparatus supporting the method, and a new frame format for the data transmission method are disclosed. A data transmission method of a tunneled direct link setup (TDLS) wireless network, including: transmitting a TDLS relay request message including relay destination station (STA) information; receiving one or more TDLS relay response messages with respect to the TDLS relay request message from one or more STAs; and selecting a relay STA from among the one or more STAs, and transmitting data desired to be transmitted to the relay destination STA, to the relay STA. A service coverage of a basic service set (BSS) can be extended, communication can be performed at low power consumption, and power of stations can be easily managed.

## Claims

### Claim 1

A data transmission method, performed by a requesting station (STA), in a wireless local area network, the method comprising:
transmitting a request message to an access point (AP), the request message including an identifier of a destination STA;
receiving a response message with respect to the request message from the AP, the response message comprising relay capable information of at least one candidate STA, the relay capable information indicating whether each candidate STA is capable of relaying;
acquiring, from the each candidate STA, a first channel information between the requesting STA and the each candidate STA;
acquiring, from the destination STA, a second channel information between the each candidate STA and the destination STA;
selecting a relay STA from among the at least one candidate STA based on the first channel information and the second channel information;
transmitting a link setup request message for establishing a relay link to the relay STA;
receiving a link setup response message from the relay STA; and
transmitting data desired to be transmitted to the destination STA, to the relay STA,
wherein a direct link is established between the requesting STA and the destination STA, and
wherein the at least one candidate STA is associated with the AP.

### Claim 2 (depends on 1)

The method of claim 1, wherein the relay STA transmits the received data to the relay destination STA.

### Claim 3

A station operating in a wireless local area network, the station comprising a processor configured to perform a data transmission method, wherein the processor is configured to:
transmit a request message to an access point (AP), the request message including an identifier of a destination station (STA);
receive a response message with respect to the request message from the AP, the response message comprising relay capable information of at least one candidate STA, the relay capable information indicating whether each candidate STA is capable of relaying;
acquire, from the each candidate STA, a first channel information between the station and the each candidate STA;
acquire, from the destination STA, a second channel information between the each candidate STA and the destination STA;
select a relay STA from among the at least one candidate STA based on the first channel information and the second channel information;
transmit a link setup request message for establishing a relay link to the relay STA;
receive a link setup response message from the relay STA; and
transmit data desired to be transmitted to the destination STA, to the relay STA,
wherein a direct link is established between the requesting STA and the destination STA, and
wherein the at least one candidate STA is associated with the AP.