Patent Document ID: 20170111816
Application ID: 14945306
Patent Flag: 0

Claim One:
1. A computer-implemented method for providing admission control to a wireless network system, the system having one or more high-priority (HP) nodes, one or more low-priority (LP) nodes, contending for access to an access point, the method comprising: categorizing the system into one LP access category (AC) and I HP ACs, wherein the LP AC has n 0 LP nodes, and each of the LP nodes has a same packet size L 0 and generates a random backoff count uniformly distributed in [0,CW 0 ] for each of new transmission or retransmission, where CW 0 is a pre-configured contention window (CW) size required by a fixed-CW algorithm, and wherein the HP AC i, where 1≦i≦l, has n i HP nodes, where n 1 +L+n 1 =n is a total number of HP nodes, and each of the HP nodes in the HP AC i has a same packet size L i and a same packet arrival rate λ i , and generates a random backoff count uniformly distributed in [0,CWD] for each of new transmission or retransmission, where CWD is a contention window size dynamically set by a dynamic-CW algorithm; setting all of the LP and HP nodes having the packet size with L; determining an optimal asymptotic HP attempt rate as follows: β opt + = W 0 ( C 0 ( σ - T c )  T c ) + 1 where w 0 (·) is a Lambert W(z) function, W(z)e W(z) =z, for any complex number z, σ is a length of a media access control MAC slot, C 0 (1−β 0 ) n 0 , n 0 is the total number of LP nodes, β 0 is an average attempt rate per slot for each of the LP AC nodes, T c is a mean time in slots for an unsuccessful transmission; determining an optimal asymptotic HP throughput Γ 1 (β opt + ) by substituting the β opt + for β + in Γ 1 (β + ) as follows: Γ 1 ( β + ) =  - β + β + C 0 L T c +  - β + [ σ - T c ] C 0 where Γ 1 (β + ) is an asymptotic total HP throughput, and β + is a total asymptotic HP attempt rate; determining one or more numerical values of operating parameters including λ i such that Σ i=1 I n i λ i L<Γ 1 (β opt + ), where Σ i=1 I n i λ i L is a total traffic load of all of the HP ACs; determining the CWD based on a requirement of total delay of a flow.