Communications subsystem between base stations and base station controllers in burst communications systems
First Claim
1. In a burst communications system, a communications subsystem comprising a base station (2) and a base station controller (1) interconnected by a pair of unidirectional transmission lines, one for each direction of communication, wherein the base station (2) communicates by a radio link with a mobile terminal (3) using a time division multiple access protocol at a bit transmission rate, wherein a frame of said protocol includes a series of bursts each of which comprises a guard field (G), a synchronisation field (S1) and a radio link information field (D), and characterised in that the base station (2) and the base station controller (1) each have means by which to communicate, at a bit rate equal to the bit transmission rate for the radio link, in frames each of which is transmitted as a series of bursts that correspond one-for-one to the bursts of the radio link, and wherein each burst comprises an information field (F) that conveys information that is the same as is conveyed by the radio link information field (D), a reduced synchronisation field (S2) and a control field (C) to convey control and signalling information between the base station (2) and its base station controller (1).
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Accused Products
Abstract
A communications subsystem between base stations and base station controllers in burst communications system of the type that links a set of base stations (2) with a base station controller (1) by means of unidirectional transmission lines (10). These base stations communicate by radio with at least one mobile terminal (3) making use of time division multiple access techniques. Communications between any base station (2) and its base station controller (1) over unidirectional transmission lines (10) make use of a frame structure with the same bit rate as that of the radio link between the base stations (2) and the mobile terminals (3), and in which the assembly formed by the guard field and the synchronisation field is replaced by a reduced synchronisation field and a control field to carry out the interchange of control and/or signalling information between the base station (2) and its base station controller (1).
29 Citations
5 Claims
- 1. In a burst communications system, a communications subsystem comprising a base station (2) and a base station controller (1) interconnected by a pair of unidirectional transmission lines, one for each direction of communication, wherein the base station (2) communicates by a radio link with a mobile terminal (3) using a time division multiple access protocol at a bit transmission rate, wherein a frame of said protocol includes a series of bursts each of which comprises a guard field (G), a synchronisation field (S1) and a radio link information field (D), and characterised in that the base station (2) and the base station controller (1) each have means by which to communicate, at a bit rate equal to the bit transmission rate for the radio link, in frames each of which is transmitted as a series of bursts that correspond one-for-one to the bursts of the radio link, and wherein each burst comprises an information field (F) that conveys information that is the same as is conveyed by the radio link information field (D), a reduced synchronisation field (S2) and a control field (C) to convey control and signalling information between the base station (2) and its base station controller (1).
Specification