Communication system

• US 20060098599A1
• Filed: 06/06/2005
• Published: 05/11/2006
• Est. Priority Date: 06/08/2004
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Infineon Technologies AG
• Inventors: Schmidt, Holger, Eckert, Michael, Choi, Hyung-Nam, Wuschke, Martin
• Granted Patent: US 7,792,079 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection

Abstract

A mobile radio communication system, which has a communication network and at least one user terminal, which communication system has a memory apparatus which is set up to store, upon clear-down of a radio link using at least one physical channel between the user terminal and the communication network, values for parameters which specify properties of the at least one physical channel from the radio link; a loading apparatus which is set up to load stored values for parameters which specify properties of at least one physical channel from a radio link; and a control apparatus which is set up to control the setup of a radio link between the user terminal and the communication network on the basis of parameter values loaded using the loading apparatus.

Claims

1-17. -17. (canceled)

18. A communication system which is set up based on UMTS and which has a communication network and at least one user terminal, where, during a soft handover in UMTS-FDD mode, the user terminal has a plurality of radio links having at least one respective physical channel to the communication network, the communication system comprising:

a memory apparatus which is set up to store, upon clear-down of at least one radio link from the plurality of radio links, values for parameters which specify properties of a physical channel from the at least one radio link;

a loading apparatus which is set up to load stored values for parameters which specify properties of at least one physical channel from a radio link; and

a control apparatus which is set up to control the setup of a radio link between the user terminal and the communication network based on parameter values loaded using the loading apparatus.

19. The communication system as claimed in claim 18, wherein the communication network comprises a network memory, and the memory apparatus is set up to use the network memory to store the values of parameters which specify the properties of the at least one physical channel from the radio link.

20. The communication system as claimed in claim 18, wherein the user terminal comprises a user terminal memory, and the memory apparatus is set up to use the user terminal memory to store the values of parameters which specify the properties of the at least one physical channel from the radio link.

21. The communication system as claimed in claim 18, wherein the values of parameters which are stored using the memory apparatus specify the properties of the at least one physical channel in full.

22. The communication system as claimed in claim 18, wherein the values of parameters which are stored using the memory apparatus specify the properties of the at least one physical channel in part.

23. The communication system as claimed in claim 18, wherein stored physical channel parameters are transmitted from a Serving Radio Network Controller (SRNC) to a Target Radio Network Controller during an SRNS relocation.

24. The communication system as claimed in claim 18, wherein the memory apparatus is set up to store, for a physical uplink channel, the maximum permissible transmission power in the uplink, values for parameters for regulating transmission power in the uplink, the type of the uplink scrambling code, and the number of the uplink scrambling code, and the spreading factor for the uplink CDMA code.

25. The communication system as claimed in claim 18, wherein the memory apparatus is set up to store, for a physical downlink channel, values for parameters for regulating transmission power in the downlink, the number of the downlink scrambling code, the spreading factor for the downlink CDMA code, and the number of the downlink CDMA code.

26. The communication system as claimed in claim 18, wherein the control apparatus is set up to select at least one radio cell from a plurality of radio cells which is specified by the user terminal, with a radio link being set up between said selected radio cell and the user terminal.

27. The communication system as claimed in claim 26, wherein the control apparatus is set up to check whether the radio cells in the specified plurality of radio cells are each able to provide a radio link between the radio cell and the user terminal based on the stored values of parameters, and to select the at least one radio cell on the basis of this check.

28. The communication system as claimed in claim 26, wherein the control apparatus is set up to set up a radio link between the at least one selected radio cell and the user terminal based on the stored values of parameters.

29. The communication system as claimed in claim 26, wherein the user terminal has a specification apparatus which is set up to determine a first plurality of radio cells based on reception quality of radio links between the user terminal and a second plurality of radio cells, and also has a transmission apparatus which is set up to transmit the first plurality of radio cells to the control apparatus as the specified plurality of radio cells.

30. A method for controlling a communication system, which is set up based on UMTS and has a communication network and at least one user terminal, where, during a soft handover in UMTS-FDD mode, the user terminal has a plurality of radio links having at least one respective physical channel to the communication network, the method comprising the steps of:

a memory apparatus storing, upon clear-down of at least one radio link from the plurality of radio links, values for parameters which specify properties of a physical channel from the at least one radio link;

a loading apparatus loading stored values for parameters which specify properties of at least one physical channel from a radio link; and

a control apparatus controlling the setup of a radio link between the user terminal and the communication network based on parameter values loaded using the loading apparatus.

31. A user terminal in a communication system, which is set up based on UMTS and has a communication network, where, during a soft handover in UMTS-FDD mode, the user terminal has a plurality of radio links having at least one respective physical channel to the communication network, where the user terminal comprises:

a memory apparatus which is set up to store, upon clear-down of at least one radio link from the plurality of radio links, values for parameters which specify properties of a physical channel from the at least one radio link;

a loading apparatus which is set up to load stored values for parameters which specify properties of at least one physical channel from a radio link; and

a user terminal control apparatus which is set up to control the user terminal during the setup of a radio link between the user terminal and the communication network based on parameter values loaded using the loading apparatus.

32. A method for controlling a user terminal in a communication system, which is set up based on UMTS and has a communication network, where, during a soft handover in UMTS-FDD mode, the user terminal has a plurality of radio links having at least one respective physical channel to the communication network, the method comprising the steps of:

a memory apparatus in the user terminal storing, upon clear-down of at least one of the radio links from the plurality of radio links, values for parameters which specify properties of a physical channel from the at least one radio link;

a loading apparatus in the user terminal loading stored values for parameters which specify properties of at least one physical channel from a radio link; and

a user terminal control apparatus in the user terminal controlling the user terminal during the setup of a radio link between the user terminal and the communication network on the basis of parameter values loaded using the loading apparatus.

33. A control apparatus in a communication system, which is set up based on UMTS and has a communication network and a user terminal, where, during a soft handover in UMTS-FDD mode, the user terminal has a plurality of radio links having at least one respective physical channel to the communication network, wherein the control apparatus comprises:

a memory apparatus which is set up to store, upon clear-down of at least one radio link from the plurality of radio links, values for parameters which specify properties of a physical channel from the at least one radio link; and

a loading apparatus which is set up to load stored values for parameters which specify properties of at least one physical channel from a radio link;

wherein the control apparatus is set up to control the setup of a radio link between the user terminal and the communication network on the basis of parameter values loaded using the loading apparatus.

34. A method for controlling a control apparatus in a communication system, which is set up on the basis of UMTS and has a communication network, where, during a soft handover in UMTS-FDD mode, the user terminal has a plurality of radio links having at least one respective physical channel to the communication network, the method comprising the steps of:

a memory apparatus in the control apparatus storing, upon clear-down of at least one radio link from the plurality of radio links, values for parameters which specify properties of the at least one physical channel from the radio link;

a loading apparatus in the control apparatus loading stored values for parameters which specify properties of a physical channel from a radio link; and

the control apparatus controlling the setup of a radio link between the user terminal and the communication network on the basis of parameter values loaded using the loading apparatus.

35. A communication system which is set up based on UMTS and which has a communication network and at least one user terminal, where, during a soft handover in UMTS-FDD mode, the user terminal has a plurality of radio links having at least one respective physical channel to the communication network, the communication system comprising:

a memory means for storing, upon clear-down of at least one radio link from the plurality of radio links, values for parameters which specify properties of a physical channel from the at least one radio link;

a loading means for loading stored values for parameters which specify properties of at least one physical channel from a radio link; and

a control means for controlling the setup of a radio link between the user terminal and the communication network based on parameter values loaded using the loading means.