Method and system for increasing frequency assignment in a mobil telecommunication system

• US 6,212,388 B1
• Filed: 06/11/1999
• Issued: 04/03/2001
• Est. Priority Date: 06/15/1998
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Seo, Seong-ju
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): VUONG, QUOCHIEN B
• Application Number:
  US09/330,880
• Time in Patent Office: 662 Days
• Field of Search: 455/450, 455/452, 455/62, 455/509, 455/513, 455/514, 455/422, 455/447, 370/329, 370/330, 370/331, 370/332
• US Class Current: 455/450
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

A method for adding frequency assignment in a mobile telecommunication system is disclosed. The method according to the present invention includes a step of getting a mobile station to receive the communication services through the presently serviceable FAs in such a way that the BTS transmits the channel list including the information of the presently serviceable FAs to the mobile station; a step of adding a new FA by the BTS; a step of generating a first channel list having only information for the added FA; a step of optimizing the new FA by getting the operating mobile station to be provided with the communication services through only the new FA; a step of generating a second channel list including the information of all FAs, which are presently serviceable by the BTS and the new FA after completion of the optimization of the new FA; and, a step of getting the mobile station to be provided with the communication services through all the FAs to the mobile station based on the second channel list.

Claims

1. A method for adding a new frequency assignment (FA) in a cellular communication system of the type having a plurality of cells with each cell containing a plurality of sectors and each sector having a group of frequencies assigned to it that is the same as the group of frequencies assigned to other sectors within that same cell, a plurality of base stations each generating a channel list having a plurality of identifiable location for various frequencies, and a least one mobile station for communicating with at least one of said base stations on a channel frequency selected from said channel list for said one base station, wherein a current channel list is based on program loaded data (PLD) containing system configuration information such as the current channel quality, current channel frequency assignments (FAs), and the number of unassigned channels, said method comprising the steps of:

(a) transmitting communication signals between said one of said base stations and said at least one mobile station via a frequency selected from said current channel list;

(b) receiving a request for a new FA at said one of said base stations from said at least one mobile station;

(c) generating a new channel list identifying only said new FA; and

,

(d) generating a combined channel list including information from both said current channel list and said new channel list, for transmitting communication signals between said one of said base stations and said at least one mobile station through a frequency selected from said combined channel list.

2. The method as set forth in claim 1, wherein generating said new channel list further comprises steps of:

(e) compiling and storing said program loaded data (PLD) based upon said new FA, wherein said PLD having a first message identifying when said PLD is in an access attempt mode which indicates that said at least one mobile station is not communicating with said one of said base stations via said new FA, and a second message identifying when said PLD is in an acknowledgement mode which indicates that said at least one mobile station is communicating with said one of said base stations via said new FA;

(f) determining whether said PLD is in said acknowledgement mode in response to said new FA;

(g) generating a separate channel list and adding said new FA to said separate channel list when said PLD is in said acknowledgement mode;

(h) determining whether said PLD is in said access attempt mode when said PLD is not in said acknowledgement mode;

(i) determining the location of channel frequency for said new FA to be assigned in said new channel list when said PLD is in said access attempt mode;

(j) generating said new channel list containing only said new FA in accordance with said determined location of channel frequency;

(k) optimizing whether channel signal quality of said new FA selected from said new channel list is acceptable;

(l) updating said PLD by switching said access attempt mode to said acknowledgement mode following completion of said step (k); and

,

(m) repeating said step (f) and said step (g) following completion of said step (l).

3. The method as set forth in claim 2, wherein the process initiated in claim 2 is terminated when said PLD is not in said attempt mode.

4. The method as set forth in claim 2, wherein the channel frequency assigned to each of said current channel list, said new channel list, and said separate channel list are transmitted via a paging channel between said one of said base stations and said at least one mobile station.

5. The method as set forth in claim 2, wherein the location of channel frequency for said new FA in said step (i) is set up to a first location in said new channel list.

6. The method as set forth in claim 2, wherein the process initiated in claim 2 is terminated when the location for said new FA in said step (i) is not assigned.

7. Method as in claim 2, wherein generating said separate list in said step (g) further comprising the steps of:

determining the location of channel frequency for said new FA to be assigned in said separate channel list when said PLD is in said acknowledgement mode;

determining whether said separate channel list is updated to include said new FA when said PLD is in said acknowledgement mode;

generating a primary channel list to include all FAs when the updated information on said separate channel list does not exist; and

,

generating an updated separate channel list to include all FAs when the updated information on said separate channel list exists.

8. The method as set forth in claim 7, wherein the process initiated in claim 7 is terminated when the location of channel frequency for said new FA is not assigned.

9. The method as set forth in claim 7, wherein the channel frequency assigned to said primary channel list and said updated channel list are transmitted via a paging channel between said one of said base stations and said at least one mobile station.

10. The method as set forth in claim 9, wherein the process initiated in claim 7 is determined to be completed when said at least mobile station receives either said primary channel list or said updated channel list via said paging channel from said one of base stations.

11. Method as in claim 2 or 7, wherein generating said separate list in said step (g) further comprises the steps of:

periodically checking said PLD to determine whether the channel signal quality of a frequency in said each sector is acceptable;

updating the separate channel list when the channel signal quality of the frequency in said each sector is acceptable; and

,

updating the separate channel list when the channel signal quality of the frequency in said each sector is not acceptable.

12. A method for adding a new frequency assignment (FA) in a cellular communication system of the type having a plurality of cells with each cell containing a plurality of sectors and each sector having a group of frequencies assigned to it that is the same as the group of frequencies assigned to other sectors within that same cell, a plurality of base stations each generating a channel list having a plurality of identifiable location for various frequencies, and a least one mobile station for communicating with at least one of said base stations on a channel frequency selected from said channel list for said one base station, wherein a current channel list is based on program loaded data (PLD) containing system configuration information such as the current channel quality, current channel frequency assignments (FAs), and the number of unassigned channels, said method comprising the steps of:

(a) transmitting communication signals between said one of said base stations and said at least one mobile station via a frequency selected from said current channel list;

(b) receiving a request for a new FA at said one of said base stations from said at least one mobile station;

(c) generating a new channel list identifying only said new FA;

(d) optimizing whether channel signal quality of said new FA selected from said new channel is acceptable; and

,

(e) generating a combined channel list including information from both said current channel list and said new channel list, for transmitting communication signals between said one of base stations and said at least one mobile station through a frequency selected from said combined channel list.

13. The method as set forth in claim 12, updating said PLD by switching said access attempt mode to said acknowledgement mode when the channel signal quality of said new FA selected from said new channel list is acceptable.

14. The method as set forth in claim 12, wherein the location of channel frequency for said new FA is set to a first location of said new channel list.

15. The method as set forth in claim 12, wherein the channel frequency assigned to each of said current channel list, said new channel list, and said combined channel list are transmitted via a paging channel between said one of base stations and said at least one mobile station.