In this work, distributed dynamic channel assignment strategies with violation to the reuse pattern using vehicular mobility information for highway microcellular environments are proposed. It is shown that, when vehicular mobility information is included in the acquisition channel policy, the outage probability degradation because of the use of channels with one violation to the reuse pattern is negligible. Also, it is shown that, using different moving direction strategies it is possible to control the tradeoff between capacity and quality of service. The local packing algorithm (LP), was modified to allow the use of two different moving direction strategies with violation to the reuse pattern, resulting the VDLP1 and VDLP2 algorithms. The characteristics of user mobility are considered and a free-flowing vehicular traffic is assumed. Simulation results show that the use of vehicular mobility information in the distributed dynamic channel algorithms with violation to the reuse pattern, produce a considerable increase in the system capacity at the expense of an insignificant degradation of the quality of service. For a grade of service (GOS) of 0.1, the VDLP1 and VDLP2 carry 4% and 1.5% more traffic than the maximum packing algorithm, respectively. For the same GOS, the VDLP1 and VDLP2 carry 68% and 64% more traffic than the fixed channel assignment algorithm, respectively.

The influence of cochannel, adjacent channel and intermodulation constraints on the capacity of the frequency band in the dynamic channel allocation problem is estimated. Algorithms including a backtracking phase with partial reassignment of currently assigned requirements are proposed. Numerical examples show a strong possibility of a 20% capacity improvement compared to the conventional strategies.

CDMA cellular land network (CCLN) consists of base stations connected to selector bank subsystem. In the case of considering only the voice traffics, CCLN can be designed based on E1/T1 physical line and HDLC protocol with fixed or variable length. However, it is necessary to support not only voice but also data traffics in CDMA cellular system. Thus, it is needed to use physical lines efficiently to increase bandwidth efficiency and transmission speed. However, the conventional CCLN has some problems that the bandwidth is wasted because each BTS has its own private line. In this paper, the method using Distributed Queue Dual Bus (DQDB) Metropolitan Area Network (MAN) as a CDMA interconnect subsystem (CIS) is considered, and the performances of conventional and proposed methods constructing CIS are analyzed by computer simulation. According to the simulation results, if the traffics from all mobile stations are uniformly distributed among all BTSs, the performances of both conventional and proposed methodology have turned out to be almost equal. However, the performance of methodology using the DQDB MAN is much better than that of conventional method, in the case that the traffics from all mobile stations are nonuniformly distributed.