# US 8,787,974 B2 · Wireless communication base station having dynamic cell structure

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,787,974 B2
- Document ID: US8787974B2
- Status: Granted
- Kind: B2
- Application number: 13/613,857
- Filed: 2012-09-13
- Published: 2013-06-13
- Granted: 2014-07-22
- Earliest claimed: 2011-12-09
- Assignees: Electronics and Telecommunications Research Institute
- Applicants: Jun Sik Kim; Kyong Tak Cho; Byung-Han Ryu; Nam Hoon Park
- Inventors: Jun Sik Kim; Kyong Tak Cho; Byung-Han Ryu; Nam Hoon Park
- Web page: https://patentgrep.com/patent/US8787974B2

## CPC

- H04W 24/02: Arrangements for optimising operational condition
- H04W 88/085: {Access point devices with remote components}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Disclosed is a wireless communication base station which includes a plurality of radio units configured to transmit and receive a radio signal; and a digital unit connected to the plurality of radio units via cables and configured to operate a communication protocol. The digital unit controls the plurality of radio units according to a communication environment to be switched into a merge state in which the plurality of radio units forms a cell, or an independent state in which the plurality of radio units forms different cells, respectively.

## Claims

### Claim 1

A wireless communication base station comprising:
a plurality of radio units configured to transmit and receive a radio signal; and
a digital unit connected to the plurality of radio units via cables and configured to operate a communication protocol,
wherein the digital unit controls the plurality of radio units according to a communication environment to be switched into a merge state in which the plurality of radio units forms a cell, or an independent state in which the plurality of radio units forms different cells, respectively,
wherein the digital unit has no function of radio communication,
wherein the digital unit calculates a channel quality based on a channel quality indicator indicating a quality of a downlink channel or information associated with a quality of an uplink channel and controls the plurality of radio units according to the calculated channel quality;
wherein when the plurality of radio units is at the independent state and a channel quality is below a first critical value, the digital unit controls the plurality of radio units to keep the independent state.

### Claim 2 (depends on 1)

The wireless communication base station of claim 1, wherein the radio units have different cell coverage, respectively.

### Claim 3 (depends on 1)

The wireless communication base station of claim 1, wherein when the plurality of radio units is at the independent state and a spare wireless resource is below a second critical value, the digital unit controls the plurality of radio units to keep the independent state.

### Claim 4 (depends on 1)

The wireless communication base station of claim 1, wherein when the plurality of radio units is at the independent state and a spare wireless resource is over a second critical value, the digital unit controls the plurality of radio units to be switched into the merge state.

### Claim 5 (depends on 1)

The wireless communication base station of claim 1, wherein when no terminal being serviced exists, the digital unit controls the plurality of radio units to be switched into an idle state.

### Claim 6 (depends on 1)

The wireless communication base station of claim 1, wherein when the plurality of radio units is at the merge state and a quality of service is lowered, the digital unit controls the plurality of radio units to be switched into the independent state.

### Claim 7 (depends on 1)

The wireless communication base station of claim 1, wherein when the plurality of radio units is at the merge state and a spare wireless resource is over a fourth critical value, the digital unit controls the plurality of radio units to keep the merge state.

### Claim 8 (depends on 1)

The wireless communication base station of claim 1, wherein when the plurality of radio units is at the merge state and a spare wireless resource is below a fourth critical value, the digital unit controls the plurality of radio units to be switched into the independent state.

### Claim 9 (depends on 1)

The wireless communication base station of claim 1, wherein the digital unit processes baseband signals of the plurality of radio units.

### Claim 10 (depends on 1)

The wireless communication base station of claim 1, wherein the plurality of radio units have no functions of processing baseband signals.

### Claim 11 (depends on 1)

The wireless communication base station of claim 1, wherein the digital unit controls the plurality of radio units according to channel quality information received from each of the plurality of radio units.