Method of assigning transmission channels in a telecommunications network and user station

• US 7,551,932 B2
• Filed: 11/10/2003
• Issued: 06/23/2009
• Est. Priority Date: 12/01/1999
• Status: Active Grant

• Current Assignee: IPCom GmbH & Co KG
• Original Assignee: IPCom GmbH & Co KG
• Inventors: Lechner, Detlef, Beckmann, Mark, Kowalewski, Frank, Laumen, Josef, Hans, Martin, Schmidt, Gunnar, Baer, Siegfried
• Primary Examiner(s): Corsaro; Nick
• Assistant Examiner(s): LAM, DUNG LE
• Application Number:
  US10/705,523
• Publication Number:
  US 20050037766A1
• Time in Patent Office: 2,052 Days
• Field of Search: 455/464, 455/452.1, 455/452.2, 455/63, 455/62.11, 455/63.13, 455/161.3, 455/185.1, 455/465, 455/450, 455/434
• US Class Current: 455/465
• CPC Class Codes: H04W 16/16 for PBS [Private Base Station] arrangements
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A method of assigning transmission channels in a telecommunications network and a user station are provided, which facilitate an increase in the capacity of a telecommunications network. The telecommunications network may include multiple base stations and mobile stations, the transmission channels being provided for transmitting signals between the base stations and the mobile stations. In uncoordinated operation of the base stations, at least one of the transmission channels is assigned for transmitting signals between one of the base stations and one of the mobile stations as a function of a channel measurement, in which the transmission power on all possible transmission channels is measured, if the previously measured transmission power on this transmission channel is minimal.

Claims

1. A method of assigning transmission channels in a telecommunications network having a plurality of base stations and a plurality of mobile stations, the transmission channels being provided for transmitting signals between the plurality of base stations and the plurality of mobile stations, the method comprising:

in an uncoordinated operation of the base stations for establishing a connection between one of the base stations and one of the mobile stations, assigning an uplink and a downlink transmission channel for the transmission of signals between the one of the base stations and the one of the mobile stations;

wherein said one of the base stations and said one of the mobile stations each perform a channel measurement on all possible transmission channels to determine whether such transmission channels are below a pre-selected value for connection quality and said uplink and downlink transmission channels are assigned based on said measurement, and thereafter said one of the base stations and said one of the mobile stations repeatedly re-measure all of the possible transmission channels not previously used to determine whether such transmission channels are below a pre-selected value for connection quality;

wherein the channel measurement on all possible transmission channels is performed prior to the assigning of the uplink channel and the downlink channel, and wherein the mobile station performs the channel measurement for channel transmissions in the downlink direction and the base station performs the channel measurement for channel transmissions in the uplink direction with independent assignment of the uplink channel and the downlink channel.

2. The method according to claim 1, further comprising use of codes to spread at least one transmission resource into a plurality of the transmission channels, wherein the channel measurement includes a code measurement, in which a received signal for each transmission resource is despread using allowed ones of the codes to measure the transmission power in each of the transmission channels.

3. The method according to claim 2, wherein the codes are provided for spreading at least one of a time slot and a frequency band.

4. The method according to claim 1, wherein a connection quality of the existing connection is measured in parallel, and, if the connection quality falls below a preselected value, a channel change is performed and at least one new transmission channel is assigned as a function of a channel measurement of the existing connection.

5. The method according to claim 1, wherein at least one of the base stations transmits specific information via a broadcast channel to all of the mobile stations within a reception range of the at least one of the base stations, and the broadcast channel is changed if an interference detected on the broadcast channel exceeds a preselected value.

6. The method according to claim 5, wherein at least one of the transmission channels is reserved for use as the broadcast channel.

7. The method according to claim 1, wherein the following steps are performed if a transmission capacity of the transmission channels established for assignment is not sufficient:

(A) scrambling at least one of the transmission channels with a new scrambling code; and

(B) assigning the at least one scrambled transmission channel for transmitting signals between one of the base stations and one of the mobile stations as a function of a channel measurement, wherein a transmission power on all possible ones of the transmission channels is measured after scrambling the at least one transmission channel, if a transmission power measured on the at least one transmission channel is minimal.