Method of allocating links in a 1x evdo system

• US 20070197244A1
• Filed: 07/26/2004
• Published: 08/23/2007
• Est. Priority Date: 07/25/2003
• Status: Active Grant

• Current Assignee: Utstarcom Korea Limited
• Original Assignee: Utstarcom Korea Limited
• Inventors: Cho, Kye
• Granted Patent: US 7,406,325 B2
• Time in Patent Office: Days
• US Class Current: 455/509
• CPC Class Codes: H04B 7/264 for data rate control
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

The present invention is directed to a method of allocating links in a base station of a 1×EVDO (EVolution Data Only) system. Conventionally, since a 1×EVDO system sequentially allocates a link to a user who requested a call setup irrespective of the link status, some of the allocated links may suffer from overload that eventually decreases the data transmission rate for the user. However, in order to perform the link allocation in due consideration of the link status, the present invention uses a link database including various status information, such as an equipment confirmation flag, a block flag, a current status, the total call user number, and the current call user number. With the status information, a base station control processor (BCP) in the 1×EVDO system of the present invention distributes traffic loads among the links and ensures an optimized data transmission rate.

Claims

1. A method of allocating links in a base station of a 1×

EVDO system comprising a link database, wherein the link database includes an equipment confirmation item for representing equipment information of the link, a link status item for representing a status of the link, a total call user number item for representing the total number of users to whom the link is allocated, and a current call user number item for representing in each sub-cell the number of users to whom the link is allocated, said method comprising the steps of;

checking the equipment confirmation item upon request for a call allocation from a user;

checking the total call user number item to determine whether there remains a link that has not been used by any of other users;

if it is determined that there remains an unused link, checking the link status item to determine whether the link is in a normal status; and

if it is determined that the link is in a normal status, allocating the link to the user.

2. The method as claimed in claim 1, said method further comprising the steps of:

if it is determined that there remains no link that has not been used by any of the other users, checking the current call user number item to determine whether there remains a link allocated to the other users sharing the sub-cell with the user; and

if it is determined that there remains a link allocated to the other users sharing the sub-cell with the user, allocating to the user the link allocated to a maximum number of the other users sharing the sub-cell with the user.

3. The method as claimed in claim 2, said method further comprising the step of:

if it is determined that there remains no link allocated to the other users sharing the sub-cell with the user, checking the total call user number item to allocate to the user the link allocated to a minimum number of the other users.