# US 8,787,826 B2 · Apparatus and method of accessing to network in wireless communication

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- Number: US 8,787,826 B2
- Document ID: US8787826B2
- Status: Granted
- Kind: B2
- Application number: 12/766,627
- Filed: 2010-04-23
- Published: 2010-10-28
- Granted: 2014-07-22
- Earliest claimed: 2009-04-24
- Assignees: LG Electronics Inc.
- Applicants: Seung June Yi; Sung Duck Chun; Sung Jun Park
- Inventors: Seung June Yi; Sung Duck Chun; Sung Jun Park
- Web page: https://patentgrep.com/patent/US8787826B2

## CPC

- H04W 48/02: Access restriction performed under specific conditions
- H04B 7/155: Ground-based stations (H04B7/204 takes precedence)
- H04B 7/2606: {Arrangements for base station coverage control, e.g. by using relays in tunnels}
- H04W 48/12: using downlink control channel
- H04W 84/047: {using dedicated repeater stations}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

A method and apparatus of accessing to a network node in a wireless communication system is provided. A relay node (RN) determines whether an access to a network node is allowable. The RN attempts to access to the network node if it is determined that the access to the network node is allowable. Service delay due to access failure can be prevented.

## Claims

### Claim 1

A method of accessing to a network node in a wireless communication system, comprising:
receiving, by a relay node (RN), a network node list from a network, the network node list including information about at least one network node which is allowed to access;
selecting, by the RN, a network node from the network node list; and
connecting, by the RN, to the selected network node,
wherein the network node list includes at least one relay node allow indicator (RNAI) and at least one network node indicator (NNI), each RNAI indicating whether each network node is allowed to access and each NNI indicating a type of the each network node, the type being a relay node or a base station;
wherein the step of the selecting the network node includes:
determining the each network node is allowed to access based on the at least one RNAI; and
selecting the network node among the at least one allowed network node by comparing the type of each allowed network node based on the at least one NNI and a predetermined preference type.

### Claim 2 (depends on 1)

The method of claim 1, wherein the each RNAI is transmitted in system information about the each network node.

### Claim 3 (depends on 1)

The method of claim 1, wherein the each RNAI is periodically transmitted.

### Claim 4 (depends on 1)

The method of claim 1, wherein the each NNI is transmitted in system information about the each network node.

### Claim 5 (depends on 1)

The method of claim 1,
wherein if the preference type is the base station, the network node is preferentially selected among at least one allowed network node of which type is base station, and
wherein if the preference type is the relay node, the network node is preferentially selected among at least one allowed network node of which type is relay node.

### Claim 6 (depends on 1)

The method of claim 1, further comprising:
requesting, by the RN, transmission of the network node list.

### Claim 7

A relay node in a wireless communication system, comprising:
a radio frequency (RF) unit configured to transmit and receive radio signals; and
a processor operatively coupled with the RF unit and configured for:
receiving a network node list from a network, the network node list including information about at least one network node which is allowed to access, the network node list including at least one relay node allow indicator (RNAI) and at least one network node indicator (NNI), each RNAI indicating whether each network node is allowed to access and each NNI indicating a type of the each network node, the type being a relay node or a base station;
determining the each network node is allowed to access based on the at least one RNAI;
selecting a network node among the at least one allowed network node by comparing the type of each allowed network node based on the at least one NNI and a predetermined preference type; and
connecting to the selected network node.

### Claim 8 (depends on 7)

The relay node of claim 7, wherein the each RNAI is transmitted in system information about the each network node.

### Claim 9 (depends on 7)

The relay node of claim 7, wherein the each RNAI is periodically transmitted.

### Claim 10 (depends on 7)

The relay node of claim 7, wherein the each NNI is transmitted in system information about the each network node.

### Claim 11 (depends on 7)

The relay node of claim 7,
wherein if the preference type is the base station, the network node is preferentially selected among at least one allowed network node of which type is base station, and
wherein if the preference type is the relay node, the network node is preferentially selected among at least one allowed network node of which type is relay node.

### Claim 12 (depends on 7)

The relay node of claim 7, wherein the processor is configured for:
requesting transmission of the network node list.