EP0522631A2
Expired / Lapsed
EP
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Interspersed traffic and control information transmission system
Assignee: Philips Electronics UK Ltd
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Filing: 1992-06-30
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Granted: —
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Expires: 2012-06-30
Abstract
Abstract An information transmission system comprises a primary station and a number of secondary stations, information being transmitted from the primary station during traffic time periods which are interspersed in time with control time slots. The control time slots contain control data (CD) which contains a number of identifying indications (CMD1,CMD2,CMD3,CMD4) which each may include an address relating to a secondary station for which succeeding traffic information is intended. The identifying indications may be configured in a number of different ways, for example (E1), it may contain an address (A) and a traffic position identifier (XN). It may also contain, for example (E2), a channel identifier (CH). The information in the control slots allows secondary stations, which may be powered down for substantial periods of time, to prepare for reception of succeeding information if an address identifying that secondary station is included in the control data (CD).
Inventors
- 👤 Peter John c/o Philips Telecom-Private Mabey
- 👤 Diana Margaret C/O Philips Telecom-Private Ball
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 20:04
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607; H04B1/1615; H04B7/00; H04B7/24; H04B7/26; H04B7/2643; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0212; H04W52/0216; H04W52/0219; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
An information transmission system comprising at least one primary station and a plurality of secondary stations, the primary station comprising means for transmitting traffic information in packets during traffic time periods and means for transmitting control information during control time slots interspersed amongst the traffic time periods, the secondary stations comprising means for receiving information transmitted by the primary station, characterised in that the means for transmitting control information is arranged to transmit an indication for identifying each secondary station for which succeeding traffic information is intended, and in that at least one secondary station further comprises means to energise the receiving means during the control slots and means responsive to the reception of an indication identifying that secondary station to energise receiving means during at least part of a following traffic time period.
Claim 2
Dependent Claim
38 words
A system as claimed in Claim 1, characterised in that the means for transmitting traffic information is arranged to transmit information in packets during a plurality of traffic time slots of equal length within a traffic time period.
Claim 3
Dependent Claim
54 words
A system as claimed in Claim 2, characterised in that the means for transmitting control information is arranged to transmit at least one indication for identifying a secondary station, the indication being located at a position in a control slot, which position identifies the location of the traffic time slot containing succeeding traffic information.
Claim 4
Dependent Claim
34 words
A system as claimed in Claim 1 or Claim 2, characterised in that the means for transmitting control information is arranged to additionally transmit a location indication for the start of succeeding traffic information.
Claim 5
Independent Claim
34 words
A system as claimed in any one of the Claims 1 to 4, characterised in that the means for transmitting control information is additionally arranged to transmit a channel indication for succeeding traffic information.
Claim 6
Independent Claim
102 words
A method of transmitting information from a primary station to a plurality of secondary stations, said method comprising transmitting traffic information in packets during traffic time periods, transmitting control information during control time slots interspersed amongst the traffic time periods, and receiving at least a portion of the transmitted information at the secondary stations, characterised in that the control information includes an indication for identifying each secondary station for which succeeding traffic information is intended, and in that in response to the reception of an indication for identifying that secondary station, the secondary station is energised to receive the succeeding traffic information.
Claim 7
Dependent Claim
80 words
A primary station for use in an information transmission system which further comprises a plurality of secondary stations, the primary station comprising means for transmitting traffic information in packets during traffic time periods and means for transmitting control information during control time slots interspersed amongst the traffic time periods, characterised in that the means for transmitting control information is arranged to transmit in a control slot an indication for identifying each secondary station for which succeeding traffic information is intended.
Claim 8
Dependent Claim
75 words
A secondary station for use with an information transmission system as claimed in Claim 1, the secondary station comprising means for receiving information transmitted by the primary station, characterised in that the secondary station further comprises means to energise the receiving means during the control time slots and means responsive to the reception of an indication identifying that secondary station for energising the receiving means during at least part of a following traffic time period.
Claim 9
Dependent Claim
48 words
A secondary station as claimed in Claim 8, characterised in that the station further comprises means responsive to the reception of a location indication during the control time slot for energising receiving means during at least part of a following traffic time period indicated by the location indication.
Claim 10
Dependent Claim
48 words
A secondary station as claimed in Claim 8, characterised in that the station further comprises means responsive to the position of an indication identifying that secondary station for energising receiving means during at least part of a following traffic time period derived from the position of the indication.
References Cited (Backward Citations)
No citation records indexed.
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