PHS(Personal Handyphone System,个人手提电话系统)进入国内市场已有5年多,全国PHS网络的设计容量已近5 000万,网上实际用户已近1500万。PHS凭借着低廉的资费吸引了众多本地用户,然而随着市场竞争的日益激烈,单凭资费已很难满足用户日益增长的需求,因此只有不断引入各类新业务才能获胜。 PHS系统最大的优势在于其单信道32kbit/s的高数据速率。目前,它可捆绑两个信道,提供64kbit/s的数据速率,因而即使在高话务区也能保证单用户稳定的 PHS (Personal Handyphone System) has been in the domestic market for more than five years. The design capacity of the PHS network nationwide has reached 50 million and the actual number of online users has nearly 15 million. PHS attracted a large number of local users due to its low tariffs. However, with the fierce market competition, tariffs alone can hardly meet the increasing demands of subscribers. Therefore, the introduction of various new businesses can only succeed. The biggest advantage of the PHS system is its high channel data rate of 32 kbit / s. Currently, it bundles two channels to provide 64 kbit / s data rates, ensuring single-user stability even in high traffic areas