Method for system registration and cell reselection

• US 5,768,267 A
• Filed: 10/18/1995
• Issued: 06/16/1998
• Est. Priority Date: 10/18/1995
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Bohaychuk, Laura E., Diachina, John, Raith, Alex Krister, Andersson, Karl-Erik, Sicher, Alan Eric, Henry, Raymond C., Prokup, Steven, Bilstrom, Lars
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): HYUN, SOON D
• Application Number:
  US08/544,488
• Time in Patent Office: 972 Days
• Field of Search: 370/326, 370/329, 370/337, 370/344, 370/349, 370/442, 370/331, 370/328, 370/345, 370/347, 370/436, 370/496, 370/522, 379/59, 379/60, 455/33.2, 455/422, 455/433, 455/434, 455/435, 455/450, 455/455, 455/464, 455/466
• US Class Current: 370/329
• CPC Class Codes: H04B 7/18545 Arrangements for managing station mobility, i.e. for station registration or localisation
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A method for registering a mobile station when the mobile station first enters a communication system which supports packet data channels is disclosed. The mobile station receives system information broadcasted on a digital control channel. The mobile station is then assigned to a beacon packet data channel over which the mobile station registers with the communication system.

Claims

1. A method for registering a mobile station when the mobile station first enters a communication system which supports packet data channels, comprising the steps of:

receiving at said mobile station system information broadcast on a digital control channel;

assigning said mobile station to a beacon packet data channel;

registering with said communication system over said beacon packet data channel.

2. A method according to claim 1, wherein said mobile station is assigned to the beacon packet data channel by a packet data channel pointer assigned to said digital control channel.

3. A method according to claim 1, further comprising the step of:

reassigning said mobile station from said beacon packet data channel to a second packet data channel.

4. A method according to claim 1, wherein said mobile station is reassigned based on past service requests.

5. A method according to claim 1, wherein said mobile station is reassigned based on current service requests.

6. A method according to claim 1, wherein said mobile station is reassigned based on past and current service requests.

7. A method according to claim 1, wherein said system information includes a neighbor list containing frequencies of other digital control channels used in neighboring cells.

8. A cell reselection method for a mobile station operating in a communication system which supports packet data channels, comprising the steps of:

receiving at said mobile station system information broadcast on a digital control channel;

assigning said mobile station to a beacon packet data channel;

registering with said communication system over said beacon packet data channel;

measuring signal strength of digital control channels of neighboring cells listed on a neighbor list included in said system information and said first digital control channel;

assigning said mobile station to a digital control channel of a neighboring cell when the signal strength of the neighboring digital control channel is higher than the signal strength of said first digital control channel.

9. A method according to claim 8, wherein said mobile station is assigned to the beacon packet data channel by a packet data channel pointer assigned to said digital control channel.

10. A method according to claim 8, further comprising the step of:

reassigning said mobile station from said beacon packet data channel to a second packet data channel.

11. A method according to claim 8, wherein said mobile station is reassigned based on past service requests.

12. A method according to claim 8, wherein said mobile station is reassigned based on current service requests.

13. A method according to claim 8, wherein said mobile station is reassigned based on past and current service requests.

14. A method according to claim 8, wherein each packet data channel provides a mobile station local information.

15. A method according to claim 14, wherein said local information includes a bit map vector which indicates which of the neighboring cells supports packet data channels.