Code resource wastage is caused by the reason that many Hopping Frequency (FH) sequences are unused, which occurs under the condition that the number of the actual subnets needed for the tactical network is far smaller than the networking capacity of code division networking. Dual-Channel Network (DCN), consisting of one single control channel and multiple data channels, can solve the code resource wastage effectively. To improve the anti-jamming capability of the control channel of DCN, Code Division Multiple Access (CDMA) technology was introduced and a Carrier Sense Random Packet (CSRP) CDMA protocol based on Random Packet CDMA (RP-CDMA) was proposed.