This paper discusses a routing protocol for supporting communication in a wireless LAN with base stations. Though a base station is critical for transmission of a message through a wired network, high cost and overhead for construction and maintenance of base stations are required to achieve a network in which a mobile computer always communicates with a base station directly. Hence, communication between a mobile computer and a base station is sporadic. If a mobile computer m changes a location with a low speed |\vec v| < v, sufficient number of messages might be exchanged between m and a base station b. However, if m changes a location with a high speed |\vec v| > v, especially when messages carry multimedia data, required number of messages might not be exchanged between m and b while m is in a transmission range of b and vice versa. Hence, this paper proposes a routing protocol CB-WSCP (Cluster to Base Station Wireless Sporadic Communication Protocol) for supporting sporadic communication and achieving transmission of more messages between a base station and a cluster of mobile computers changing locations with high speed.