WO1998005175B1 - Method of freeing a voice channel in a radio telecommunications network - Google Patents
Method of freeing a voice channel in a radio telecommunications networkInfo
- Publication number
- WO1998005175B1 WO1998005175B1 PCT/SE1997/001269 SE9701269W WO9805175B1 WO 1998005175 B1 WO1998005175 B1 WO 1998005175B1 SE 9701269 W SE9701269 W SE 9701269W WO 9805175 B1 WO9805175 B1 WO 9805175B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cell
- congested
- mobile station
- voice channel
- identifying
- Prior art date
Links
- 230000001413 cellular Effects 0.000 claims abstract 29
Abstract
A method is disclosed of freeing a voice channel in a congested first cell (Cell B) in a cellular telecommunication system upon demand and without dropping an ongoing call. The method begins by identifying a second cell (Cell D) that neighbors the congested first cell, identifying a first mobile station (M2) operating on a voice channel in the congested first cell near the boundary of the second cell, and forcing a handoff of the first mobile station from the congested first cell to the second cell, thereby freeing the voice channel. If the second cell is also congested, the method identifies a third cell (Cell E) neighboring the second cell and identifies a second mobile station (M3) operating in the second cell near the boundary of the third cell. The method then forces a handoff of the second mobile station from the second cell to the third cell, thereby freeing a second voice channel located in the second cell. Finally, the method forces a handoff of the first mobile station from the congested first cell to the second cell, utilizing the second voice channel, thereby freeing the first voice channel in the congested first cell.
Claims
1. A method of freeing an occupied voice channel in a congested first cell in a cellular telecommunication system upon demand and without dropping an ongoing call, said method comprising the steps of : identifying a first mobile station, said first mobile station operating on the occupied voice channel in the congested first cell; identifying a second cell, said second cell neighboring the congested first cell; receiving in the congested first cell, a request for a voice channel from a second mobile station; and forcing a handoff of the first mobile station from the congested first cell to the second cell when the occupied voice channel is requested by the second mobile station within the congested first cell, thereby freeing the occupied voice channel.
2. The method of freeing an occupied voice channel in a congested first cell in a cellular telecommunication system of claim 1 wherein the step of forcing a handoff of the first mobile station from the congested first cell to the second cell includes forcing the handoff when the second mobile station attempts to access the cellular telecommunication system within the congested first cell .
3. The method of freeing an occupied voice channel in a congested first cell in a cellular telecommunication system of claim 1 wherein the step of identifying a second cell neighboring the congested first cell includes measuring received signal strength between the first mobile station and a plurality of cells neighboring the congested first cell .
4. The method of freeing an occupied voice channel in a congested first cell in a cellular telecommunication system of claim 3 wherein the step of measuring received signal strength between the first mobile station and a plurality of cells neighboring the congested first cell includes measuring the received signal strength at the first mobile station.
5. The method of freeing an occupied voice channel in a congested first cell in a cellular telecommunication system of claim 3 wherein the step of measuring received signal strength between the first mobile station and a plurality of cells neighboring the congested first cell includes measuring the received signal strength at the plurality of cells neighboring the congested first cell.
6. The method of freeing an occupied voice channel in a congested first cell in a cellular telecommunication system of claim 3 wherein the step of identifying a second cell neighboring the congested first cell includes identifying a cell neighboring the congested first cell with the highest measured received signal strength of the plurality of cells neighboring the congested first cell.
7. The method of freeing an occupied voice channel in a congested first cell in a cellular telecommunication system of claim 1 wherein the step of identifying a first mobile station operating in the congested first cell includes identifying a first mobile station operating in the congested first cell near a boundary of the second cell.
8. The method of freeing an occupied voice channel in a congested first cell in a cellular telecommunication system of claim 7 wherein the step of identifying a first mobile station operating in the congested first cell includes identifying a first mobile station with sufficient received signal strength from the second cell to maintain a call in the second cell. -28-
9. The method of freeing a voice channel in a congested first cell in a cellular telecommunication system of claim 7 further comprising the steps of: identifying a third ceil, said third cell neighboring said second cell; identifying a third mobile station, said third mobile station operating in said second cell; forcing a handoff of said third mobile station from said second cell to said third cell; and directing said second mobile station to access said cellular telecommunication system as a directed retry through said second cell.
10. The method of freeing a voice channel in a congested first cell in a cellular telecommunication system of claim 7 wherein said step of forcing a handoff of said first mobile station from said congested first cell to said second cell includes forcing said handoff when said second mobile station roams into said congested first cell during a call .
11. The method of freeing a voice channel in a congested first cell in a cellular telecommunication system of claim 7 wherein said step of forcing a handoff of said first mobile station from said congested first cell to said second cell includes forcing said handoff before said cellular telecommunication system automatically performs a handoff of said first mobile station based on predetermined criteria.
12. A method of freeing an occupied voice channel in a congested first cell in a cellular telecommunication system upon demand and without dropping an ongoing call, said method comprising the steps of: identifying a second cell, said second cell neighboring the congested first cell, said step of identifying a second cell comprising: -29-
measuring received signal strength between a first mobile station operating in the congested first cell, and a plurality of cells neighboring the congested first cell; and identifying a cell neighboring the congested first cell with the highest measured received signal strength of the plurality of cells neighboring the congested first cell; determining that the occupied voice channel is needed by a second mobile station within the congested first cell; and forcing a handoff of the first mobile station from the congested first cell to the second cell when the occupied voice channel is needed by the second mobile station, said step of forcing the handoff being performed before the cellular telecommunication system automatically performs a handoff of the first mobile station based on predetermined criteria.
13. A method of freeing a first voice channel in a congested first cell in a cellular telecommunication system upon demand and without dropping an ongoing call, said method comprising the steps of: identifying a second cell, said second cell neighboring said congested first cell; identifying a third cell, said third cell neighboring said second cell; identifying a first mobile station, said first mobile station operating in said congested first cell; identifying a second mobile station, said second mobile station operating in said second cell; determining whether said second cell is congested; forcing a handoff of said second mobile station from said second cell to said third cell upon determining that said second cell is congested, thereby freeing a second voice channel located in said second cell; and -30-
forcing a handoff of said first mobile station from said congested first cell to said second cell, utilizing said second voice channel, thereby freeing said first voice channel m said congested first cell .
14. The method of freeing a first voice channel in a congested first cell in a cellular telecommunication system of claim 13 wherein said step of identifying a third cell neighboring said second cell includes identifying a third cell that does not neighbor said congested first cell .
15. The method of freeing a voice channel in a congested first cell in a cellular telecommunication system of claim 13 wherein said step of identifying a second cell neighboring said congested first cell includes measuring received signal strength between said first mobile station and a plurality of cells neighboring said congested first cell .
16. The method of freeing a voice channel in a congested first cell in a cellular telecommunication system of claim 15 wherein said step of identifying a second cell neighboring said congested first cell includes identifying a cell neighboring said congested first cell with the highest measured received signal strength of said plurality of cells neighboring said congested first cell.
17. The method of freeing a voice channel m a congested first cell in a cellular telecommunication system of claim 13 wherein said step of identifying a first mobile station operating in said congested first cell includes identifying a first mobile station operating in said congested first cell near a boundary of said second cell. -31-
18. The method of freeing a voice channel in a congested first cell in a cellular telecommunication system of claim 16 wherein said step of identifying a first mobile station operating in said congested first cell includes identifying a first mobile station with sufficient received signal strength from said second cell to maintain a call in said second cell .
19. The method of freeing a voice channel in a congested first cell in a cellular telecommunication system of claim 13 wherein said steps of forcing a handoff of said second mobile station from said second cell, and forcing a handoff of said first mobile station from said congested first cell include forcing said handoffs when an occupied voice channel is needed in said congested first cell by a third mobile station.
20. The method of freeing a voice channel in a congested first cell in a cellular telecommunication system of claim 19 wherein said step of forcing said handoffs when an occupied voice channel is needed in said congested first cell by a third mobile station includes forcing said handoffs before said cellular telecommunication system automatically performs said handoffs based on predetermined criteria.
21. A method of freeing a first voice channel in a congested first cell in a cellular telecommunication system upon demand and without dropping an ongoing call, said method comprising the steps of: identifying a second cell, said second cell neighboring said congested first cell, said step of identifying a second cell comprising the steps of: measuring received signal strength between a first mobile station operating in said congested first cell, and a plurality of cells neighboring said congested first cell; and -32-
identifying a cell neighboring said congested first cell with the highest measured received signal strength of said plurality of cells neighboring said congested first cell; identifying a third cell, said third cell neighboring said second cell, but not neighboring said congested first cell ; identifying a second mobile station, said second mobile station operating in said second cell, said second mobile station having sufficient received signal strength from said third cell to maintain a call in said third cell ; determining whether said second cell is congested; forcing a handoff of said second mobile station from said second cell to said third cell upon determining that said second cell is congested, thereby freeing a second voice channel located in said second cell, said handoff of said second mobile station being forced before said cellular telecommunication system automatically performs said handoff of said second mobile station based on predetermined criteria; and forcing a handoff of said first mobile station from said congested first cell to said second cell, utilizing said second voice channel, thereby freeing said first voice channel in said congested first cell, said handoff of said first mobile station being forced before said cellular telecommunication system automatically performs said handoff of said first mobile station based on predetermined criteria.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU37131/97A AU724174B2 (en) | 1996-07-29 | 1997-07-11 | Method of freeing a voice channel in a radio telecommunications network |
| GB9901707A GB2331673B (en) | 1996-07-29 | 1997-07-11 | Method of freeing a voice channel in a radio telecommunications network |
| DE19781897T DE19781897T1 (en) | 1996-07-29 | 1997-07-11 | Method for releasing a voice channel in a radio telecommunications network |
| DE19781897A DE19781897B4 (en) | 1996-07-29 | 1997-07-11 | A method for releasing a voice channel in a radio telecommunications network |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68166896A | 1996-07-29 | 1996-07-29 | |
| US08/681,668 | 1996-07-29 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO1998005175A2 WO1998005175A2 (en) | 1998-02-05 |
| WO1998005175A3 WO1998005175A3 (en) | 1998-03-05 |
| WO1998005175B1 true WO1998005175B1 (en) | 1998-05-14 |
Family
ID=24736242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE1997/001269 WO1998005175A2 (en) | 1996-07-29 | 1997-07-11 | Method of freeing a voice channel in a radio telecommunications network |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN1100457C (en) |
| AU (1) | AU724174B2 (en) |
| DE (2) | DE19781897B4 (en) |
| GB (1) | GB2331673B (en) |
| WO (1) | WO1998005175A2 (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2762166B1 (en) * | 1997-04-10 | 1999-06-11 | Alsthom Cge Alcatel | METHOD AND DEVICE FOR THE PREDICTION OF RADIO RESOURCE IN A CELLULAR RADIOCOMMUNICATION SYSTEM WITH MOBILES |
| SE522542C2 (en) * | 1998-03-26 | 2004-02-17 | Telia Ab | Method for redistributing traffic load on a cellular cellular telephone system |
| US6381458B1 (en) | 1998-05-15 | 2002-04-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and system for soft handoff control based on access network capacity |
| US6081713A (en) * | 1998-05-18 | 2000-06-27 | Telefonaktiebolaget Lm Ericsson | Method of selectively directing a mobile station to retry system access in a radio telecommunication system |
| WO2002045450A1 (en) * | 2000-11-28 | 2002-06-06 | Nokia Corporation | A method for determining neighboring cells in a communication network |
| US7945266B2 (en) | 2000-12-05 | 2011-05-17 | Qualcomm Incorporated | Method and apparatus for call recovery in a wireless communication system |
| US7567781B2 (en) | 2001-01-05 | 2009-07-28 | Qualcomm, Incorporated | Method and apparatus for power level adjustment in a wireless communication system |
| CN1159878C (en) * | 2000-12-07 | 2004-07-28 | 华为技术有限公司 | Macrodiversity-based direct retry method for CDMA system |
| US6882677B2 (en) * | 2001-02-28 | 2005-04-19 | Motorola, Inc. | Method and apparatus for facilitating handoff in a wireless local area network |
| US6725044B2 (en) * | 2002-08-15 | 2004-04-20 | Thomson Licensing S.A. | Technique seamless handoff of a mobile terminal user from a wireless telephony network to a wireless LAN |
| GB2395632B (en) * | 2002-11-23 | 2006-01-11 | Motorola Inc | Communication system and method for reducing congestion therein |
| JPWO2005025253A1 (en) * | 2003-08-27 | 2006-11-16 | 富士通株式会社 | HANDOVER METHOD AND BASE STATION CONTROL DEVICE |
| KR100689508B1 (en) | 2003-09-04 | 2007-03-02 | 삼성전자주식회사 | Method for performing handover in a communication system |
| JP4367493B2 (en) * | 2007-02-02 | 2009-11-18 | ソニー株式会社 | Wireless communication system, wireless communication apparatus, wireless communication method, and computer program |
| IL260171B (en) | 2018-06-20 | 2021-10-31 | Omnistream | Systems and methods for triggering a handover in wireless communication networks |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1230663A (en) * | 1968-12-10 | 1971-05-05 | ||
| SE458734B (en) * | 1984-10-31 | 1989-04-24 | Ericsson Telefon Ab L M | PROCEDURE TO PROVIDE THE NUMBER OF CALL OPPORTUNITIES IN A MOBILE PHONE SYSTEM |
| DE3441722A1 (en) * | 1984-11-15 | 1986-05-15 | Robert Bosch Gmbh, 7000 Stuttgart | RADIO TELEPHONE NETWORK |
| US4670899A (en) * | 1985-05-31 | 1987-06-02 | Northern Telecom Limited | Load balancing for cellular radiotelephone system |
| US5241685A (en) * | 1991-03-15 | 1993-08-31 | Telefonaktiebolaget L M Ericsson | Load sharing control for a mobile cellular radio system |
| US5428816A (en) * | 1993-09-09 | 1995-06-27 | Hughes Aircraft Company | Method and apparatus for mobile assisted handoff |
| US5633915A (en) * | 1995-05-16 | 1997-05-27 | Southern Methodist University | Multilayered arrangement for load sharing in a cellular communication system |
| US5790954A (en) * | 1995-05-30 | 1998-08-04 | Motorola, Inc. | Methods of requesting volunteers for handoff in a cellular system |
-
1997
- 1997-07-11 WO PCT/SE1997/001269 patent/WO1998005175A2/en active Application Filing
- 1997-07-11 AU AU37131/97A patent/AU724174B2/en not_active Ceased
- 1997-07-11 DE DE19781897A patent/DE19781897B4/en not_active Expired - Fee Related
- 1997-07-11 DE DE19781897T patent/DE19781897T1/en active Pending
- 1997-07-11 CN CN97196843A patent/CN1100457C/en not_active Expired - Fee Related
- 1997-07-11 GB GB9901707A patent/GB2331673B/en not_active Expired - Fee Related
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