Method and apparatus for generating handover neighbor list in a cellular mobile communication system

• US 20050048974A1
• Filed: 12/22/2003
• Published: 03/03/2005
• Est. Priority Date: 09/01/2003
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Seo, Hyeon-Mi, Jin, Hae-Dong, Kim, Mi-Jung
• Granted Patent: US 7,493,120 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04W 36/00835 Determination of neighbour cell lists
• CPC Class Codes: H04W 36/0085 Hand-off measurements

Abstract

A method and apparatus for generating a handover neighbor list of base stations capable of communicating with a mobile terminal in a cellular mobile communication system. A UMTS RAN manager (URM) collects handover attempt count and handover ratio data as handover statistical information of a source base station and determines rankings of target base stations in order of handover frequency from the base station according to the handover attempt count or the handover ratio. The URM then generates a neighbor list of the source base station in order of high ranking. The proposed method and apparatus reduces overhead due to cell searching in performing handover.

Claims

1. A method for generating a handover neighbor list in a cellular mobile communication system, comprising the steps of:

collecting handover statistical information of a source base station;

determining rankings of target base stations in order of handover frequency from the base station according to the handover statistical information; and

generating a neighbor list of the source base station in order of high ranking.

2. The method of claim 1, wherein the handover statistical information includes at least one of a handover attempt count and a handover ratio, for handover from the source base station to each of the target base stations.

3. The method of claim 1, wherein the ranking determination step comprises determining rankings of the target base stations in order of high handover attempt count.

4. The method of claim 1, wherein the ranking determination step comprises determining rankings of the target base stations in order of high handover ratio.

5. The method of claim 1, wherein the neighbor list generation step comprises generating a new neighbor list by partially applying the rankings to a previously generated neighbor list.

6. An apparatus for generating a handover neighbor list in a cellular mobile communication system, comprising:

a statistics block for collecting handover statistical information of a source base station;

a handover analysis block for determining rankings of target base stations in order of handover frequency from the base station according to the handover statistical information; and

a neighbor list generation block for generating a neighbor list of the source base station in order of high ranking.

7. The apparatus of claim 6, wherein the handover statistical information includes at least one of a handover attempt count and a handover ratio, for handover from the source base station to each of the target base stations.

8. The apparatus of claim 6, wherein the handover analysis block determines rankings of the target base stations in order of high handover attempt count.

9. The apparatus of claim 6, wherein the handover analysis block determines rankings of the target base stations in order of high handover ratio.

10. The apparatus of claim 6, wherein the neighbor list generation block generates a new neighbor list by partially reflecting the rankings to a previously generated neighbor list.