Method for controlling call access of terminal in mobile communication system

• US 6,973,062 B1
• Filed: 05/03/1999
• Issued: 12/06/2005
• Est. Priority Date: 05/04/1998
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Information & Communications Ltd. (LG Corporation)
• Inventors: Han, Jong Sun
• Primary Examiner(s): Pham, Chi
• Assistant Examiner(s): ABELSON, RONALD B
• Application Number:
  US09/303,554
• Time in Patent Office: 2,409 Days
• Field of Search: 370/335, 370/209, 370341-342, 370/312, 370/432, 370/441
• US Class Current: 370/335
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04W 48/12 using downlink control channel

Abstract

In a method for controlling call access of a terminal in a mobile communication system based on cellular communication system, call access of mobile terminals can efficiently be controlled depending on the state of individual resources of Walsh code classes assigned to each mobile terminal from the base station and the state of a reverse link in a communication system which supports multi-transmission rate depending on service options of the mobile terminals. The method for controlling call access of a terminal in a mobile communication system includes the steps of permitting a base station to periodically broadcast call access control information including traffic information of a reverse link and information of at least one or more code classes in which Walsh codes assigned to a mobile station from the base station are classified depending on transmission rate, to a plurality of mobile terminals in its cell or sector, and permitting the mobile terminal to periodically receive the call access control information and requesting call access of the base station depending on the call access control information.

Claims

1. A method for controlling call access of a terminal in a communication system, comprising:

broadcasting from a base station a call access control signal including interference information of a reverse link and state information of at least one or more code classes in which Walsh codes assigned to mobile stations from the base station are classified depending on transmission rate, to a plurality of mobile stations in its cell or sector on a paging channel or broadcast channel,

wherein the call access control signal is broadcast independently from an uplink access channel request, and

wherein a corresponding mobile station of the plurality of mobile stations uses the call access control signal to determine which code class to use when performing an uplink call access to uplink data from the corresponding mobile terminal to the base station.

2. The method as claimed in claim 1, wherein the information of each code class indicates whether the state of each code class is idle or busy.

3. The method as claimed in claim 1, wherein the call access control signal is transmitted through at least one of a broadcasting channel per super frame period and a paging channel per slot cycle period.

4. The method as claimed in claim 1, wherein the mobile station uses a code class having the highest priority if the mobile station requests call access of the base station.

5. A method of a call access control, comprising:

transmitting a first status and a second status to a mobile terminal; and

requesting an uplink call access using the received first and second status,

wherein the first status is interference information and the second status is code class availability information, and

wherein the first and second transmitted statuses are independently transmitted from the requested uplink call access.

6. The method of claim 5, wherein the first status is interference information of a reverse link.

7. The method of claim 5, wherein the second status indicates if a code class is idle or busy.

8. The method of claim 5, wherein the second status indicates if a plurality of code classes are idle or busy.

9. The method of claim 8, wherein the requested call access is based on a priority of the plurality of available code classes based on the second status.

10. The method as claimed in claim 5, wherein the first and second statuses are transmitted through at least one of a broadcasting channel per super frame period and a paging channel per slot cycle period.

11. The method as claimed in claim 5, wherein the mobile terminal uses a code class having the highest priority if the mobile terminal requests call access of the base station.

12. The method as claimed in claim 5, wherein the first status and second status is transmitted on a paging channel or broadcast channel.

13. A method for controlling call access in a communication system, comprising:

repeatedly broadcasting from a base station uplink call access control information to a plurality of mobile stations, the call access control information including interference information and code class information,

wherein the repeatedly broadcast call access control information transmitted independent of to a specific mobile station call access request, and

wherein a corresponding mobile station uses the call access control information to determine which code class to use when performing an uplink call access to uplink data from the corresponding mobile terminal to the base station.

14. The method of claim 13, wherein the interference information is information of a reverse link and the code class information is information of at least one code class representing a set of Walsh codes assigned to the plurality of mobile stations and classified based on a transmission rate.

15. The method as claimed in claim 13, wherein the interference information of the reverse link compares overall received power from the plurality of mobile stations in the cell or sector of the base station with a predefined threshold value, and then selectively indicates whether a current reverse channel is idle or busy.

16. The method as claimed in claim 13, wherein the code class information indicates individually whether the state of each code class is idle or busy.

17. The method as claimed in claim 13, wherein the call access control information are transmitted through a broadcasting channel per super frame period.

18. The method as claimed in claim 13, wherein the call access control information are transmitted through a paging channel per slot cycle period.

19. The method as claimed in claim 13, wherein the mobile station uses a code class having the highest priority if the mobile station requests call access of the base station.

20. The method as claimed in claim 13, wherein, if the interference information of the reverse link in the call access control information is idle, the mobile station identifies the state of an individual resource of the code class so as to implement call access using a code class assigned to oneself among code classes which are idle.

21. A method for accessing a base station, comprising:

receiving call access control information including reverse link state information and Walsh code class state available information without requesting call access on a paging channel or a broadcast channel transmitted from the base station; and

accessing the base station using an available code class based on the received Walsh code class state information and the reverse link state information.

22. The method as claimed in claim 21, wherein the code class information includes information on a plurality of code classes have relative priority orders if a code length of each code class is different.

23. The method of claim 21, wherein the reverse link state information is interference information.

24. The method of claim 21, wherein the reverse link state information indicates if a reverse link is idle or busy.

25. The method as claimed in claim 21, wherein the call access control information is transmitted through at least one of a broadcasting channel per super frame period and a paging channel per slot cycle period.

26. The method as claimed in claim 21, wherein a mobile terminal uses a code class having the highest priority if the mobile terminal requests call access of the base station.

27. A method for controlling call access in a communication system, comprising:

repeatedly broadcasting from a base station call access control information to a plurality of mobile stations on a paging channel or broadcast channel, the call access control information including interference information and code class state information; and

performing an uplink call access using an available code class based on the call access control information,

wherein the call access control information is repeatedly broadcast from the base station to the plurality of mobile stations independently from the uplink call access request.

28. The method as claimed in claim 27, wherein the mobile station uses a code class having the highest priority of available code classes based on the call access control information, if the mobile station requests call access of the base station.