Patent ID: 6393030
Filing Date: 2002-05-21
Classification: H04B,H04W

Abstract:
A method for receiving a new call so as to maximize a capacity of a code divisional multiple access (CDMA) system wherein a base station communicates messages with a plurality of mobile subscribers, a call indicates a physical signal for communicating messages via voice or data in the system, a plurality of calls exist at an instant communicating between the base station and mobile subscribers, a currently progressing call indicates a data call existing at an instant, and the new call indicates an incoming call in addition to the currently processing call, said method comprising steps of:(a) providing a service with a maximum transmission rate for the data call in case that a load of the system is smaller than the system capacity when all calls are transmitted at a fixed rate; and (b) decreasing the transmission rate of the data in case the system is overload, maintaining a total interference quantity to a target value of service quality, and receiving the new call; wherein said step (a) comprises steps of: (a-1) checking whether the new call is acceptable by employing a system drain probability expression when the new call is required for a receipt; and (a-2) computing the maximum transmission rate of the data call through a use of the system drain probability expression and servicing the new call, in case the new call is acceptable.