Method of optimizing an implementation of fast-dynamic channel allocation call admission control in radio resource management

• US 20040192318A1
• Filed: 12/23/2003
• Published: 09/30/2004
• Est. Priority Date: 02/27/2003
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.), UTC Fuel Cells, LLC
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Fisher, Xiaochun Xu
• Granted Patent: US 7,107,060 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 72/0466 the resource being a scrambling code
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method of optimizing a fast dynamic channel allocation call admission control algorithm in a wireless communication system includes a pre-code allocation process, a signal-independent code allocation process, and a post-code allocation process. The pre-code allocation process includes receiving and processing a request message and obtaining system measurements and information from a centralized database. The code allocation process begins by checking the availability of a code set in the cell and generating timeslot sequences for the available timeslots. A code set is assigned to the available timeslots in a timeslot sequence, wherein a successful assignment is a solution. The interference signal code power (ISCP) is calculated for each solution and the solution having the lowest weighted ISCP is selected as an optimal solution. The post-code allocation process includes storing allocation information in a centralized database and creating a response message.

Claims

1. A method of optimizing a fast dynamic channel allocation call admission control algorithm in a wireless communication system, comprising:

a pre-code allocation process;

a signal-independent code allocation process, including;

checking the availability of a code set in the cell;

generating timeslot sequences for the available timeslots;

assigning a code set to the available timeslots in a timeslot sequence, wherein a successful assignment is a solution;

calculating the interference signal code power (ISCP) for each solution; and

selecting the solution having the lowest weighted ISCP as an optimal solution; and

a post-code allocation process.

2. The method according to claim 1, wherein the pre-code allocation process includes:

receiving a request message;

processing the request message;

obtaining Node B measurements from a centralized database; and

obtaining available timeslots from the centralized database.

3. The method according to claim 2, wherein the processing step includes:

reading wireless transmit/receive unit (WTRU) measurements from the request message;

reading WTRU coded composite transport channel information and dedicated channel information from the request message;

reading WTRU capability information from the request message; and

obtaining code sets from the centralized database, based upon a requested data rate contained in the request message.

4. The method according to claim 1, wherein the post-code allocation process includes:

storing allocation information in a centralized database; and

creating a response message.

5. The method according to claim 4, wherein the storing step includes:

creating a wireless transmit/receive unit (WTRU) entity in the database;

recording WTRU information from the request message in the database; and

recording physical channel information in the database.

6. The method according to claim 4, wherein the creating step includes:

adding power control information to the response message; and

adding physical channel information to the response message.

7. A method for a fast dynamic channel allocation call admission control (CAC) in a wireless communication system, comprising the steps of:

receiving a request message to initiate the CAC function;

processing the request message;

obtaining Node B measurements from a centralized database;

retrieving a list of available timeslots and a list of code sets from the centralized database;

allocating a code set to the available timeslots in a timeslot sequence;

storing the allocation information in the centralized database; and

sending a response message with the results of the code allocation process.

8. The method according to claim 7, wherein the processing step includes reading wireless transmit/receive unit (WTRU) measurements, WTRU coded composite transport channel information, and dedicated channel information from the request message.

9. The method according to claim 8, wherein the WTRU measurements include downlink interference signal code power.

10. The method according to claim 7, wherein the retrieving step further includes reading Node B measurements from the centralized database.

11. The method according to claim 10, wherein the Node B measurements include:

common measurements, including uplink interference signal code power and downlink transmitted carrier power; and

dedicated measurements, including downlink transmitted code power.

12. The method according to claim 7, wherein the allocating step includes the steps of:

checking the availability of a code set in the cell;

generating timeslot sequences from the list of available timeslots; and

assigning a code set to the available timeslots in a timeslot sequence to find a solution, wherein a successful assignment is a solution.

13. The method according to claim 12, wherein the allocating step further includes the steps of:

calculating an interference signal code power (ISCP) value for the solution; and

selecting the solution having the lowest weighted ISCP value as an optimal solution.

14. The method according to claim 7, wherein the storing step includes:

creating a wireless transmit/receive unit (WTRU) entity in the centralized database;

recording WTRU information from the request message in the centralized database; and

recording physical channel information in the centralized database.

15. The method according to claim 14, wherein the WTRU information recorded in the centralized database includes:

the WTRU identification;

a transaction identification;

uplink WTRU capability information, including;

the maximum number of timeslots per frame; and

the maximum number of uplink physical channels per timeslot;

downlink WTRU capability information, including;

the maximum number of timeslots per frame; and

the maximum number of downlink physical channels per timeslot; and

radio link information.

16. The method according to claim 15, wherein the radio link information includes:

the radio link identification;

a cell identification;

uplink code composite transport channel (CCTrCH) information; and

downlink CCTrCH information.

17. The method according to claim 16, wherein the CCTrCH information includes:

a CCTrCH identification;

a CCTrCH status;

a CCTrCH signal to interference ratio target;

a guaranteed data rate;

an allowed data rate; and

dedicated physical channel information.

18. The method according to claim 17, wherein the dedicated physical channel information includes:

dedicated physical channel timeslot information;

a repetition period value; and

a repetition length value.

19. The method according to claim 18, wherein the dedicated physical channel information includes:

a timeslot number;

a midamble shift and burst type;

a transport format combination indicator presence; and

code information.

20. The method according to claim 19, wherein the code information includes:

a channelized code;

a code usage status;

a dedicated physical channel identification; and

a code signal to interference target.

21. The method according to claim 7, wherein the sending step includes filling the response message with power control information and physical channel information.

22. The method according to claim 21, wherein the power control information includes:

an uplink (UL) target signal to interference ratio (SIR);

a maximum UL SIR;

a minimum UL SIR;

an initial downlink (DL) transmission power;

a minimum DL transmission power; and

a maximum allowed UL transmission power.

23. The method according to claim 21, wherein the physical channel information includes:

a list of timeslots; and

the channelized codes in each timeslot.