Abstract
IEEE 802.16 uses the code division multiple access (CDMA) method as the channel access method to decrease the collision probability of data delivery. However, IEEE 802.16 does not regulate a ranging code allocation scheme in its specification. In this paper, we propose the adaptive ranging code allocation (ARCA) scheme, a novel ranging code allocation scheme for IEEE 802.16. According to the traffic sent to the base station (BS) from the mobile station (MS), the ARCA scheme not only forecasts the traffic quantity of the MS but also finds the optimal ranging code allocation value for the MS to improve the transmission success rate next time. The ARCA scheme is verified with simulation and compared with other schemes in performance differences. According to the simulation results, the ARCA scheme is proved to have better performance than other schemes.
Highlights
Due to the remarkable advance of networks, people have many requirements in wireless networks
The adaptive ranging code allocation (ARCA) scheme works like the DRCA scheme to distribute ranging codes among four ranging subgroups according to the Ranging and bandwidth request (BR) messages received by a base station (BS), we have a new equation in the ARCA scheme to find the parameters capable of making the system have the optimal total transmission success rate
When administrators want to alleviate the overhead of a BS executing the ARCA scheme, they can use (4) to build a table composed of the numbers of the four messages and the numbers of ranging codes allocated to the four messages for achieving pmax
Summary
Due to the remarkable advance of networks, people have many requirements in wireless networks. EURASIP Journal on Wireless Communications and Networking type incurring the high traffic in order to decrease the MSs’ chances of choosing the same ranging code and has proved with simulation to have a better total transmission success rate. To overcome the weakness of the DRCA scheme and get the optimal transmission success rate, in this paper we propose an algorithm named the adaptive ranging code allocation (ARCA) scheme, a new ranging code allocation scheme. The ARCA scheme works like the DRCA scheme to distribute ranging codes among four ranging subgroups according to the Ranging and BR messages received by a BS, we have a new equation in the ARCA scheme to find the parameters capable of making the system have the optimal total transmission success rate.
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