There is a subtle difference between Max. no. of retransmissions & Tx-Integer.
Tx: It indicates the number of time slots in an interval when an MS sends continuously multiple channel requests.To reduce the collisions on the RACH and to raise the efficiency of the RACH, access algorithm is defined This parameter works together with the configuration of the CCCH(parameter S)When T increases, the interval between two adjacent channel requests increases, and RACH conflicts decrease.
When S increases, the interval between two adjacent channel requests increases, and RACH conflicts decrease, thus improving the usage of AGCH and SDCCH.
The access time of the MS, however, is prolonged and the network performance is threatened when T and S increase. Thus, an appropriate T value should be adopted to ensure that S is as low as possible, and that AGCH and SDCCH are not overloaded