| 摘要 |
In a TDMA cellular network, there is provided a mechanism for shared-carrier fre quency-hopping. It comprises: allocating on a frame basis within a reuse diameter to one coverage area (A-I) during certa in timeslot(s) at least one from a pool of TDM frame-hopped carriers and allocating on a frame basis within that carrier re use diameter to another coverage area (A-I) during certain other, substantially non-overlapping timeslot(s) that frame-hoppe d carrier, all in substantially non-interfering time-synchronism with any proximal reuse of that carrier, whereby the advantages of frequency hopping are obtained. Stated differently, it comprises: at one instant in time, allocating within a reuse dia meter to one coverage area (A-I) at least one of a plurality of hopped carriers and at that same instant in time, allocating within that carr ier reuse diameter to another coverage area (A-I) another of that plurality of hopped carriers, all in time-synchronism with any p roximal reuse of that carrier. The control and access carriers may also be included in the hopping pool, causing certain timesl ots to be hopped on a sequence different from the others. The pool of hopped carriers is further apportioned among co-located site s into hopping groups, thereby reducing intra-system synchronization requirements. To solve the near/far problem, TDM ti meslots bordering hopping boundaries are preferentially allocated to less distant mobile users.
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