公开(公告)号：BR0004560A

公开(公告)日：2001-04-03

申请号：BR0004560

申请日：2000-08-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KIM KYOUNG II ,  SALVARANI ALEXANDRO FEDERICO

IPC: H04B17/00 ,  H04B7/005 ,  H04B7/26 ,  H04M3/00 ,  H04W52/34 ,  H04W72/08 ,  H04Q7/38

Abstract: A method for preventing overload conditions in a communication system. The communication system performs a call load analysis and admits a subscriber requesting admission (or responding to a page) to the system based on the result of the call load analysis. The call load analysis is based on the signal to noise power ratios of all subscribers already admitted to the communication system. External jammer signals that interfere with subscriber signals thus reducing the coverage of the communication system do not affect the call load analysis. The jammer signals therefore, do not hinder an efficient use of the capacity of the communication system. A threshold value is established and such threshold value is compared to an average call load value calculated from a plurality of instantaneous call load values. When the calculated average call load value is substantially equal to or above the established threshold, no subscribers are admitted to the communication system; subscribers are admitted when the calculated average call load value is below the established threshold. Individual subscribers whose contributions to the average call load value are deemed significant (tending to cause or actually causing overload conditions) are identified and removed from the system.

公开(公告)号：CA2320534A1

公开(公告)日：2001-03-23

申请号：CA2320534

申请日：2000-09-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KIM KYOUNG II

IPC: H04B7/155 ,  H04W72/00 ,  H04Q3/64 ,  H04Q7/36

Abstract: A system and method for controlling call admission in a wireless communications network recursively estimates reverse link load levels as a function of changes in base station receive power and/or the number of mobiles served in the cell/sector. In one implementation, a call admission controller utilizes multiple load level estimating methods, whereby a first method estimates load as a function of changes in base station receive power and changes in the number of served mobiles. The call admission controller uses a second method to recursively update load level estimates as proportionally changing with number of users. The call admission controller may utilize a third estimate method as an accuracy check based on a changes in base station receive power measurements. The call admission controller outputs a call blocking command when load level estimates exceed a threshold to avoid cell/sector overload conditions and network instability.