Cell reselection signalling method

• US 7,433,698 B2
• Filed: 01/17/2001
• Issued: 10/07/2008
• Est. Priority Date: 01/17/2000
• Status: Expired due to Term

• Current Assignee: Sisvel International S.A. (Fineur International S.A.)
• Original Assignee: Nokia Corporation
• Inventors: Turunen, Juha, Salonaho, Oscar, Iisakkila, Kaisu, Marjelund, Pekka
• Primary Examiner(s): D AGOSTA, STEPHEN M
• Application Number:
  US10/181,078
• Publication Number:
  US 20030003928A1
• Time in Patent Office: 2,820 Days
• Field of Search: 455/436, 455/437, 455/442, 455/432.1, 455/435.2, 455/438, 455450-453, 455/455, 455/464, 455/462, 370/332
• US Class Current: 455/462
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link

Abstract

The invention relates to methods pertaining to cell reselection in a cellular telecommunication system. According to the invention, a connection setup rejection message is used to direct a mobile communication means to attempt a new connection with certain parameter values such as a certain carrier frequency. A plurality of parameter values may as well be indicated in the message, which allows the network to direct the mobile communication means to make a connection setup request to a specific cell, for example. The connection setup rejection message can be for example the CONNECTION SETUP REJECT message of the RRC protocol.

Claims

1. A method for channel reselection signaling in a cellular telecommunications network, the method comprising the steps of:

generating a connection rejection message; and

sending the connection rejection message from the cellular telecommunications network to a mobile station;

wherein the connection rejection message includes information relating to a value of at least one frequency parameter relating to connection setup for use in a new connection setup attempt.

2. The method of claim 1, wherein said connection rejection message is a RRC CONNECTION REJECT message.

3. The method of claim 1, wherein said information comprises information which relates to a preferred channel for a next connection attempt.

4. The method of claim 1, wherein said information comprises information which relates to a reference time difference between a previously attempted connection to a channel and a preferred channel for a next connection attempt.

5. The method of claim 1, wherein said information comprises information which relates to a primary CPICH channel.

6. The method of claim 1, wherein said information comprises information which relates to a primary CCPCH channel.

7. The method of claim 1, wherein said information comprises scrambling code information corresponding to a specific preferred channel.

8. The method of claim 1, wherein said information comprises channel code information corresponding to a specific preferred channel.

9. The method of claim 1, wherein said information comprises information which relates to a second cellular telecommunication network.

10. A channel reselection method in a mobile communication means of a cellular telecommunication system, the method comprising the steps of:

receiving a connection rejection message;

observing at least one parameter of said connection rejection message; and

setting a value of at least one parameter for a new connection setup attempt based at least in part on information in at least one frequency parameter of said connection rejection message.

11. The method of claim 10, wherein said connection rejection message is a RRC CONNECTION REJECT message.

12. The method of claim 10, wherein if a predetermined parameter of said connection rejection message has a predetermined value, the value of at least one parameter for a new connection attempt is obtained from a system information message.

13. The method of claim 10, further comprising the steps of:

setting a reception frequency based on the value of said at least one frequency parameter of said connection rejection message;

selecting a channel transmitting on said reception frequency; and

initialing a connection setup procedure.

14. The method of claim 10, further comprising the steps of:

setting a reception frequency based on the value of said at least one frequency parameter of said connection rejection message;

setting a specific channel scrambling code based on the value of said at least one frequency parameter of said connection rejection message; and

initiating a connection setup procedure.

15. The method of claim 10, further comprising the steps of:

setting a reception frequency based on the value of said at least one frequency parameter of said connection rejection message;

setting a specific channel code based on the value of said at least one frequency parameter of said connection rejection message; and

initiating a connection setup procedure.

16. The method of claim 15, further comprising the step of:

setting a timing value based on the value of said at least one frequency parameter of said connection rejection message.

17. The method of claim 10, further comprising the step of:

setting a reception frequency based on the value of said at least one frequency parameter of said connection rejection message.

18. The method of claim 10, further comprising the step of:

setting a timing value based on the value of said at least one frequency parameter of said connection rejection message.

19. The method of claim 10, further comprising the step of:

setting a scrambling code parameter based on the value of said at least one frequency parameter of said connection rejection message.

20. The method of claim 10, further comprising the step of:

setting a channel code parameter based on the value of said at least one frequency parameter of said connection rejection message.

21. The method of claim 10, further comprising the step of:

setting a parameter describing a specific primary CPICH channel based on the value of said at least one frequency parameter of said connection rejection message.

22. The method of claim 10, further comprising the step of:

setting a parameter describing a specific primary CCPCH channel based on the value of a said at least one frequency parameter of said connection rejection message.

23. The method of claim 10, further comprising the step of:

setting a parameter identifying a second cellular telecommunication network based on the value of said at least one frequency parameter of said connection rejection message.

24. The method of claim 11, further comprising the step of:

starting the new connection attempt based at least on the value the said at least one frequency parameter of said connection rejection message.

25. A network element of a cellular telecommunications network, wherein the network element is configured to indicate, in a connection rejection message to a mobile station, information which relates to a value of at least one frequency parameter relating to connection setup for use in a new connection setup attempt.

26. The network element of claim 25, wherein the network element is an element of a radio access network of a cellular telecommunications network.

27. The network element of claim 25, wherein the network element is a radio network controller.

28. The network element of claim 25, wherein said connection rejection message is a RRC CONNECTION REJECT message.

29. The network element of claim 25, wherein said information comprises information which relates to a preferred channel for a next connection attempt.

30. The network element of claim 25, wherein said information comprises information which relates to a reference time difference between a previously attempted channel and a preferred channel for a next connection attempt.

31. The network element of claim 25, wherein said information comprises information which relates to a primary CPICH channel.

32. The network element of claim 25, wherein said information comprises information which relates to a primary CCPCH channel.

33. The network element of claim 25, wherein said information comprises scrambling code information corresponding to a specific preferred channel.

34. The network element of claim 25, wherein said information comprises channel code information corresponding to a specific preferred channel.

35. The network element of claim 25, wherein said information comprises information which relates to a second cellular telecommunication network.