第三章曾经提到，在车载无线通信中，SCH信道用于非交通安全消息的通信，

Chapter 3 mentioned that in the vehicle-mounted wireless communication, the SCH channel is used for the communication of non-traffic safety messages, that is, the communication of traditional data services. It is precisely because of the existence of the SCH channel that it is possible for passengers to use the in-vehicle communication network for Internet access. However, due to the periodic switching of CCH and SCH channels, a certain amount of bandwidth is wasted, and it may have an adverse effect on the performance of upper-layer services. In this chapter, aiming at the problem of bandwidth waste on the SCH channel, a frame-length selection transmission strategy is proposed.

The third chapter mentions that in in-vehicle wireless communication, the SCH channel is used for the communication of non-traffic safety messages, that is, the communication of traditional data services. It is the presence of THE SCH channel that makes it possible for passengers to use the in-vehicle communication network for Internet access. However, the periodic switching of CCH and SCH channels results in a certain amount of bandwidth waste and may adversely affect the performance of the upper-level business. This chapter puts forward a frame-by-length selection sending strategy for bandwidth waste on THE SCH channel.

In the third chapter, it has been mentioned that in vehicle wireless communication, sch channel is used for the communication of non traffic safety messages, that is, the communication of traditional data services. It is the existence of SCH channel that makes it possible for passengers to access the Internet by using the vehicle communication network. However, due to the periodic handoff between CCH and sch channels, a certain amount of bandwidth is wasted, and the performance of upper layer services may be adversely affected. In this chapter, a frame length selection strategy is proposed to solve the problem of bandwidth waste in Sch channel.<br>