Method for measuring confusion rate of a common packet channel in a CDMA communication system

• US 20030103476A1
• Filed: 04/10/2001
• Published: 06/05/2003
• Est. Priority Date: 04/10/2000
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Park, Seong-Ill, Jung, Ki-Ho, Choi, Sung-Ho, Lee, Hyun-Woo, Choi, Ho-Kyu
• Granted Patent: US 7,233,577 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/322 Power control of broadcast channels
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/008 with additional processing of random access related information at receiving side
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A method is disclosed for determining by a UTRAN a persistence value having a value between 0 and 1 for adjusting a number of access preambles from a plurality of UEs requiring assignment of a common packet channel (CPCH). The method includes the steps of counting a number of the access preambles detected in an access preamble period having a predetermined period; and determining the persistence value based on the number of counted access preambles. The persistence value is determined in a unit of transport format (TF), physical common packet channel (PCPCH), or CPCH set.

Claims

1. A method for determining by a UTRAN a persistence value for adjusting a number of access preambles from a plurality of UEs requiring assignment of a common packet channel (CPCH), the method comprising the steps of:

counting the number of the access preambles detected in an access preamble period having a predetermined period; and

determining the persistence value based on the number of counted access preambles.

2. The method as claimed in claim 1, wherein the persistence value is determined in a unit of transport format (TF).

3. The method as claimed in claim 1, wherein the persistence value is determined in a unit of physical common packet channel (PCPCH).

4. The method as claimed in claim 1, wherein the persistence value is determined in a unit of CPCH set.

5. A method for determining by a UTRAN a persistence value for adjusting a number of CD (Collision Detection) preambles from a plurality of UEs requiring a CPCH, the method comprising the steps of:

counting the number of CD access preambles detected in an access preamble period having a predetermined period; and

determining the persistence value based on the number of counted CD access preambles.

6. The method as claimed in claim 5, wherein the persistence value is determined in a unit of TF.

7. The method as claimed in claim 5, wherein the persistence value is determined in a unit of PCPCH.

8. The method as claimed in claim 5, wherein the persistence value is determined in a unit of CPCH set.

9. A method for determining by a UTRAN a persistence value for adjusting a number of assigned CPCHs at a CPCH assignment request of UEs, the method comprising the steps of:

counting the number of the CPCHs assigned by the UTRAN in an access preamble period having a predetermined period; and

determining the persistence value based on the number of counted CPCHs.

10. The method as claimed in claim 9, wherein the persistence value is determined in a unit of TF.

11. The method as claimed in claim 9, wherein the persistence value is determined in a unit of PCPCH.

12. The method as claimed in claim 9, wherein the persistence value is determined in a unit of CPCH set.

13. A method for adjusting CPCH access attempts depending on a number of CPCH access attempts from a plurality of UEs requiring assignment of CPCH, comprising the steps of:

requesting measurement of the CPCH access attempts;

upon receipt of a measurement request, counting the number of the CPCH access attempts from the UEs per unit time and reporting the counted value;

determining, in a CRNC (Control Radio Network Controller), a persistence value depending on the number of the CPCH access attempts reported; and

providing the determined persistence value to a UTRAN.

14. The method as claimed in claim 13, wherein the number of the CPCH access attempts is equivalent to a number of access preambles from the UEs.

15. The method as claimed in claim 13, wherein the number of CPCH access attempts is equivalent to a number of CD preambles from the UEs.

16. The method as claimed in claim 13, wherein the step of counting the number of CPCH access attempts is performed in a unit of TF.

17. The method as claimed in claim 13, wherein the step of counting the number of CPCH access attempts is performed in a unit of PCPCH.

18. The method as claimed in claim 13, wherein the step of counting the number of CPCH access attempts is performed in a unit of CPCH set.