EP0622911A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Diversity transmission strategy in mobile/indoor cellular radio communications
Assignee: International Business Machines Corp
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Filing: 1994-04-15
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Granted: —
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Expires: 2014-04-15
Abstract
Abstract In a mobile cellular communication system, a base station is wired to a Local Area Network (LAN), and has wireless communication with a plurality of mobile stations. Multipath fading is substantially reduced in the system by utilizing antenna diversity techniques at the base station and each of the plurality of mobile stations. The combination of the independent operation of antenna selection diversity at both a base station and a mobile station results in the selection of the best propagation path between the two stations.
Inventors
- 👤 David F. Bantz
- 👤 Frederic J. Bauchot
- 👤 Chia-Chi Huang
- 👤 Nicholas J.A. Moulton
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 16:49
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0817; H04B7/0805; H04B7/0814
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
In a diversity transmission system for wireless radio communications between a base station and at least one mobile station, the combination of: at least two antennas at each of said base station and said at least one mobile station for transmission of data between the respective stations; means for determining which one of said at least two antennas receives data most successfully, with this antenna being referred to as a preferred antenna; a preferred antenna storage means in which is stored indica indicative of which antenna is determined to be the preferred antenna; and a controller at each of said base station and said at least one mobile station which is responsive to the indica stored in the preferred antenna storage means for controlling the transmission of data between the respective stations by selecting the preferred antenna at the respective stations.
Claim 2
Dependent Claim
40 words
The combination claimed in claim 1, including: means for changing the preferred antenna if an acknowledgement of reception of data isn't received within a predetermined time, or if the acknowledgement is received more successfully on another than said preferred antenna.
Claim 3
Dependent Claim
22 words
The combination claimed in claim 2, including: means for updating the preferred antenna storage means to reflect the change in preferred antenna.
Claim 4
Dependent Claim
38 words
The combination claimed in at least one of claims 1 to 3, including: means for signalling a failure when an acknowledgment of reception of the data is not received after a predetermined number of transmissions of the data.
Claim 5
Dependent Claim
341 words
A diversity transmission system for determining the best wireless communication path between at least one base station and at least one mobile station, comprising: at least two base station antennas for transmission of data between said base station antenna and said mobile station; means for determining which of said at least two base station antennas receives transmitted data most successfully from said mobile station, with this antenna being referred to as a preferred base station antenna; a base station storage means for storing indicia indicative of which base station antenna is determined to be the preferred base station antenna; means responsive to the stored indicia in said base station storage means for selecting the preferred base station antenna for transmission of data from said base station to said mobile station; means for changing the preferred base station antenna if an acknowledgement of reception of data from said mobile station is not received, or if the acknowledgement is received more successfully on a base station antenna other than said preferred base station antenna; at least two mobile station antennas for transmission of data between said mobile station and said base station; means for determining which of said at least two mobile station antennas receives transmitted data most successfully from said base station, with this antenna being referred to as a preferred mobile station antenna; a mobile station storage means in which is stored indicia indicative of which mobile station antenna is determined to be the preferred mobile station antenna; means responsive to the stored indicia in said mobile station storage means for selecting the preferred mobile station antenna for transmission of data from said mobile station to said base station; means for changing the preferred mobile station antenna if an acknowledgement of reception of data isn't received from the base station, or if the acknowledgement is received more successfully on a mobile station antenna other than said preferred antenna; and means for updating the indicia stored in said mobile station storage means to reflect the change in said preferred mobile station antenna.
Claim 6
Dependent Claim
46 words
The combination claimed in claim 5, including: means for signalling a failure at said base station when an acknowledgement of reception of data is not received from said mobile station following a predetermined number of transmissions of data from said base station to said mobile station.
Claim 7
Dependent Claim
48 words
The combination claimed in claim 5 or 6, including: means for signalling a failure at said mobile station when an acknowledgement of reception of data is not received from said base station following a predetermined number of transmissions of data from said mobile station to said base station.
Claim 8
Dependent Claim
533 words
In a diversity transmission system for wireless radio communications between a base station and a plurality of mobile stations, the combination of: at least two base station antennas at said base station for transmission of data between said base station and said plurality of mobile stations; at least two base station radio transceivers located at said base station with each such transceiver being connected to a different one of said at least two base station antennas; means for determining which one of said at least two base station transceivers receives data most successfully from each of said plurality mobile stations, with this transceiver being referred to as a preferred base station transceiver with respect to the mobile station it is receiving data from; a preferred base station transceiver storage means in said base station controller, in which is stored indica indicative of which base station transceiver is determined to be the preferred base station transceiver with respect to each of said plurality of mobile stations; means responsive to the stored indicia in said preferred base station transceiver storage means for selecting the preferred base station transceiver for transmission of data from said base station to a given one of said plurality of mobile stations; means for changing the preferred base station transceiver for said given mobile station if an acknowledgement of reception of data from said given mobile station isn't received, or if the acknowledgement is received more successfully on a base station transceiver other than said preferred transceiver; means for updating the indicia stored in said preferred base station to reflect the change in preferred antenna for said given mobile station; at least two mobile station antennas at each of said plurality of mobile stations for transmission of data between said plurality of mobile stations and said base station; a mobile station radio transceiver located at each of said plurality of mobile stations, which is selectively connected to said at least two mobile station antennas; means for determining which one of said at least two mobile station antennas at each of said plurality of mobile stations, receives data most successfully from said base station, with this mobile station antenna being referred to as a preferred mobile station antenna; a preferred mobile station antenna storage means in which is stored indicia indicative of which mobile station antenna is determined to be the preferred mobile station antenna; means, at each of said plurality of mobile stations which is responsive to the stored indicia in said preferred mobile station antenna storage means for selectively connecting said mobile station radio transceiver to the preferred mobile station antenna for controlling the transmission of data between a mobile station and said base station; means for signalling a failure at said base station when an acknowledgement of reception of data is not received from a given mobile station following a predetermined number of transmissions of the data from said base station to said given mobile station; and means for signalling a failure at said given mobile station when an acknowledgement of reception of data is not received from said base station following a predetermined number of transmissions of the data from said given mobile station to said base station.
Claim 9
Dependent Claim
521 words
In a diversity transmission system for wireless radio communications between a base station and a plurality of mobile stations, the combination of: at least two base station antennas at said base station for transmission of data between said base station and said plurality of mobile stations; a base station radio transceiver which is selectively connected to said at least two base station antennas; means for determining which one of said at least two base station antennas receives data most successfully from each of said plurality of mobile stations, with this antenna being referred to as a preferred base station antenna with respect to the mobile station it is receiving data from; a preferred base station antenna storage means, in which is stored indica indicative of which base station antenna is determined to be the preferred base station antenna with respect to each of said plurality of mobile stations; means responsive to the stored indicia in said preferred base station antenna storage means for selectively connecting said base station radio transceiver to the preferred antenna for controlling the transmission of data from said base station to teach of said plurality of mobile stations; means for changing the preferred base station antenna for a given mobile station if an acknowledgement of reception of data from said given mobile station isn't received within a predetermined time, or if the acknowledgement is received more successfully on a base station antenna other than said preferred antenna; means for updating the indicia stored in said preferred base station antenna storage means to reflect the change in preferred antenna for said given mobile station; at least two mobile station antennas at each one of said plurality of mobile stations for transmission of data between said plurality of mobile stations and said base station; a mobile station radio transceiver located at each of said plurality of mobile stations, which is selectively connected to said at least two mobile station antennas; means for determining which one of said at least two mobile station antennas at each of said plurality of mobile stations receives data most successfully from said base station, with this mobile station antenna being referred to as a preferred mobile station antenna; a preferred mobile station antenna storage means in which is stored indicia indicative of which mobile station antenna is determined to be the preferred mobile station antenna; means at each of said plurality of mobile stations, which is responsive to the stored indicia in said preferred mobile station antenna storage means for selectively connecting said mobile station radio transceiver to the preferred mobile station antenna for controlling the transmission of data between a mobile station and said base station; means for signalling a failure at said base station when an acknowledgement is not received from a given mobile station following a predetermined number of transmissions of the data from said base station to said given mobile station; and means for signalling a failure at said given mobile station when an acknowledgement is not received from said base station following a predetermined number of transmissions of the data from said given mobile station to said base station.
Claim 10
Dependent Claim
580 words
In a diversity transmission system for wireless radio communications between a base station and a plurality of mobile stations, the combination of: at least two base station antennas at said base station for transmission of data between said base station and said plurality of mobile stations; at least two base station radio transceivers located at said base station with each such transceiver being connected to a different one of said at least two base station antennas; means for determining which one of said at least two base station transceivers receives data most successfully from each of said plurality of mobile stations, with this transceiver being referred to as a preferred base station transceiver with respect to the mobile station it is receiving data from; a preferred base station transceiver storage means in which is stored indica indicative of which base station transceiver is determined to be the preferred base station transceiver with respect to each of said plurality of mobile stations; means responsive to the stored indicia in said preferred base transceiver storage means for selecting the preferred base station transceiver for transmission of data from said base station to a given one of said plurality of mobile stations; means for changing the preferred base station transceiver for said given mobile station if an acknowledgement of reception of data from said given mobile station isn't received within a predetermined time, or if the acknowledgement is received more successfully on a base station transceiver other than said preferred transceiver; means for updating the indicia stored in said preferred base station transceiver storage means to reflect the change in preferred antenna for said given mobile station; at least two mobile station antennas at each one of said plurality of mobile stations for transmission of data between said plurality of mobile stations and said base station; at least two mobile station radio transceivers located at each of said plurality of mobile stations with each such transceiver being connected to a different one of said at least two base mobile antennas; means for determining which one of said at least two mobile station transceivers receives data most successfully from said base station, with this transceiver being referred to as a preferred mobile station transceiver; a preferred mobile station transceiver storage means in which is stored indica indicative of which mobile station transceiver is determined to be the preferred mobile station transceiver; means at each of said plurality of mobile stations which is responsive to the stored indicia in said preferred mobile station transceiver storage means for selectively connecting the preferred mobile station radio transceiver for transmission of data a mobile station to said base station; means for changing the preferred mobile station transceiver if an acknowledgement of reception of data from said base station isn't received within a predetermined time, or if the acknowledgement is received more successfully on a mobile station transceiver other than said preferred mobile station transceiver; means for updating the preferred mobile station transceiver storage means to reflect the change in preferred transceiver; means for signalling a failure at said base station when an acknowledgement is not received from a given mobile station following a predetermined number of transmissions of the data from said base station to said given mobile station; and means for signalling a failure at said given mobile station when an acknowledgement is not received from said base station following a predetermined number of transmissions of the data from said given mobile station to said base station.
Claim 11
Independent Claim
163 words
A method of operating a diversity transmission system for wireless radio communications between a base station and at least one mobile station, with at least two antennas at each of said base station and said at least one mobile station for transmission of data between each other, with a controller at each of said base station and said at least one mobile station for controlling the transmission of data between each other, said method comprising the steps of: determining which one of said at least two antennas receives data most successfully, with this antenna being referred to as a preferred antenna; storing indica in a preferred antenna storage device in said controller which is indicative of which antenna is determined to be the preferred antenna; and selecting by said controller at each of said base stations and said at least one mobile station, the preferred antenna for transmission of data, in response to the stored indicia in the respective preferred antenna storage devices.
Claim 12
Independent Claim
418 words
A method of operating a diversity transmission system for determining the best wireless communications path between a base station having at least two base station antennas and a mobile station having at least two mobile station antennas, said method comprising the steps of: determining which of said at least two base stations antennas received transmitted data from said mobile station most successfully, with this antenna being referred to as a preferred base station antenna; storing indicia in a base station storage device which is indicative of which base station antenna is determined to be the preferred base station antenna; responding to the stored indicia in said base station storage device for selecting the preferred base station antenna for transmission of data from said base station to said mobile station; changing the preferred base station antenna if an acknowledgement of reception of data is not received from said mobile station, or if an acknowledgement of reception of data is received from said mobile station more successfully on a base station antenna other than said preferred base station antenna; updating the indicia stored in said base station storage means to reflect the change in the preferred base station antenna; determining which of said at least two mobile station antennas received transmitted data from said base station most successfully, with this antenna being referred to as a preferred mobile station antenna; storing indicia in a mobile station storage device which is indicative of which mobile station antenna is determined to be the preferred mobile station antenna; responding to the stored indicia in said mobile station storage device for selecting the preferred mobile station antenna for transmission of data from said mobile station to said base station; changing the preferred mobile station antenna if an acknowledgement of reception of data by said base station is not received, or if an acknowledgement is received more successfully on a mobile station antenna other than the presently preferred base station antenna; updating the indicia stored in said mobile station storage means to reflect the change in preferred mobile station antenna; signalling a failure at said base station when an acknowledgement of reception of data is not received from said mobile station following a predetermined number of transmissions of data from said base station to said mobile station; and signalling a failure at said mobile station when an acknowledgement of reception of data is not received from said base station following a predetermined number of transmissions of data from said mobile station to said base station.
References Cited (Backward Citations)
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