EP0631450A1
Expired / Lapsed
EP
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Communication subsystem between base stations and base station controllers in burst communication systems
Assignee: Alcatel Lucent SAS
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Filing: 1994-06-22
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Granted: —
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Expires: 2014-06-22
Abstract
Abstract 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).
Inventors
- 👤 Carlos Hita De La Torre
- 👤 Francisco José Escrihuela Langa
- 👤 Francisco Jávier Martinez Garcia
- 👤 Carlos Hernandez Blanco
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 21:40
CPC Classifications
H; H04; H04W; H04W92/00; H04W92/04; H04W92/12; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2643; H04B7/2656; H04W88/00; H04W88/08; H04W88/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
190 words
COMMUNICATIONS SUBSYSTEM BETWEEN BASE STATIONS AND BASE STATION CONTROLLERS IN BURST COMMUNICATIONS SYSTEMS, in which each base station (2) establishes a radio link with at least one mobile terminal (3) making use of time division multiple access techniques in the air interface, the frame of which includes a series of bursts that comprise a guard field (G), a synchronisation field (S1) and an information field (D) and in which the communications between base stations (2) and base station controllers (1) are made by means of unidirectional transmission lines (10) and characterised in that the communications between any base station (2) and its base station controller (1) over unidirectional transmission lines (10) use a frame structure with the same bit rate as that of the radio link between the base station (2) and the mobile terminals (3), and in which the assembly formed by the guard field (G) and the synchronisation field (S1) is replaced by the assembly formed by a reduced synchronisation field (S2) and a control field (C) to carry out the interchange of control and/or signalling information between the base station (2) and its base station controller (1).
Claim 2
Dependent Claim
44 words
COMMUNICATIONS SUBSYSTEM according to claim 1, characterised in that the clock frequency used for transmitting information in both directions between the base station controller (1) and the base stations (2) is generated in a single master clock included in the base station controller (1).
Claim 3
Dependent Claim
45 words
COMMUNICATIONS SUBSYSTEM according to claim 1, characterised in that the control field (C) contains control and/or signalling information in both the direction from base station controller (1) to base station (2) and in the direction from base station (2) to its base station controller (1).
Claim 4
Dependent Claim
25 words
COMMUNICATIONS SUBSYSTEM according to claim 1, characterised in that the control field (C) includes a protective mechanism against errors in the unidirectional transmission line (10).
Claim 5
Dependent Claim
158 words
COMMUNICATIONS SUBSYSTEM according to claim 4, characterised in that the control field (C) comprises at least two subfields of control information in which one is a replica of the other and each includes a command area (CA,CB) that contains the control information and a parity bit (PA,PB) in order to have error detection by means of parity detection, such that: - if both parity bits (PA,PB) and both command areas (CA,CB) of both subfields of control information are equal, then both control information subfields (CA,CB) are considered error-free, - if only one of the parity bits (PA,PB) of either of the control subfields is correct, then the control subfield with the correct parity bit is considered to be error-free, and - if both parity bits (PA,PB) are erroneous, or if both are correct but the command areas (CA and CB) are not equal, then an error message is generated by the part receiving the control field (C) mentioned.
References Cited (Backward Citations)
EP0168647A2
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EP0189822A2
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