| 摘要 |
A code division multiple access (CDMA) mobile communications network in which a geographical area covered by the network is divided into macrocells and each macrocell has a node, whereby communications to and from a mobile terminal in a macrocell may take place via its node over one or more of a plurality of frequency channels allocated to the macrocell, wherein at least one macrocell has a microcell defined within it having its own node, whereby communications to and from a mobile terminal in a microcell may take place via its node over one or more of a plurality of frequency channels allocated to the macrocell, the macrocell sharing at least one frequency channel with its macrocell and at least one of the macrocell and the macrocell having at least one unshared frequency channel, the network comprises: means arranged to allocate calls to frequency channels arranged to allocate an unshared frequency channel to a call only if the or each shared frequency channel have insufficient capacity.
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