Staggered channelization code allocation for multi-carrier networks

摘要

In order to provide load balancing in a wireless network that includes a cell with two or more carriers, sequential service requests for radio resources are allocated to respective ones of the two or more carriers in a staggered manner (i.e., a round robin, or least recently used (LRU) approach). In an embodiment, the sequential requests are directed so as to allocate channelization codes of respective code trees associated with the two or more carriers substantially equally. The signal strength of a carrier may be checked prior to allocation. Trigger conditions may be checked prior to allocating a request to a carrier using the LRU approach. The trigger conditions may include power utilization of a first carrier compared to a second carrier, channelization code tree offset between two or more code trees respectively associated with the two or more carriers, and/or average bit rate per subscriber load of the carriers.

主权项

1. A method for load balancing in a wireless network including a cell having two or more carrier frequencies, comprising:
receiving service requests from mobile devices in the cell; assigning during call setup for each of the service requests, if one or more trigger conditions are satisfied, a respective one of the two or more carrier frequencies to respective service requests in a round robin manner; determining whether at least one of the one or more trigger conditions are satisfied according to a difference in power between the two or more carrier frequencies reaching a predetermined level; and if the one or more trigger conditions are not satisfied for a call corresponding to a first service request of the service requests initiated on a first of the carrier frequencies, continuing the call on the first of the carrier frequencies until the call is complete; and if the one or more trigger conditions are satisfied for the call corresponding to the first service request on the first of the carrier frequencies, assigning the call to a second of the carrier frequencies in the round robin manner and the second of the carrier frequencies instead of the first of the carrier frequencies is used to complete the call.