EP0332818A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cellular telephone system with shared radio data channels
Assignee: Motorola Solutions Inc
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Filing: 1989-01-23
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Granted: —
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Expires: 2009-01-23
Abstract
Abstract A unique packet-switched cellular telephone system includes a cellular switch (140) and base sites (110) for providing packet-switched data services to cellular data telephones (102). Cellular switch (140) includes packet access points (152, 153) coupled to a packet network and T1 span lines (160, 161) coupled to the landline telephone network. Base sites (110) are coupled to cellular switch (140) by T1 span lines (164, 165) in which all time slots are clear channels and one time slot is dedicated for common channel signalling. Multiple data calls are assigned to each packet-mode radi channel thereby conserving valuable radio channel spectrum. Data calls are handed off from one packet-mode radio channel to another on the basis of cellular data telephone movement, signal strength, and/or bit-error rate, or on the basis of radio channel data packet capacity, data packet traffic, and/or data packet throughout.
Inventors
- 👤 Kenneth A. Felix
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 20:23
CPC Classifications
H; H04; H04W; H04W72/00; H04W72/04; H04W72/044; H04W72/0446; H04W36/00; H04W36/24; H04W36/06; H04W36/08; H04W74/00; H04W74/04; H04W84/00; H04W84/02; H04W84/04; H04W84/042; H04W92/00; H04W92/02; Y; Y10; Y10S; Y10S370/00; Y10S370/912; Y10S370/913
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
136 words
A cellular telephone system for switching telephone calls between cellular telephones and a landline network and switching data between cellular telephones and a data network, comprising: a plurality of base sites each including: transceiver means having at least one signalling radio channel for receiving voice radio channel requests and data radio channel requests from cellular telephones, and having voice radio channels and shared data radio channels for communications with the cellular telephones; and control means responsive to a voice radio channel request for assigning a cellular telephone to a voice radio channel and responsive to a data channel request for assigning a cellular telephone to a shared data radio channel; and switching means coupled to each base site for coupling voice radio channels to the landline network and shared data radio channels to the data network.
Claim 2
Dependent Claim
136 words
A cellular telephone system for switching telephone calls between cellular telephones and a landline network and switching data between cellular telephones and a data network, comprising: a plurality of base sites each including: transceiver means having at least one signalling radio channel for receiving voice radio channel requests and data radio channel requests from cellular telephones, and having voice radio channels and shared data radio channels for communications with the cellular telephones; and control means responsive to a voice radio channel request for assigning a cellular telephone to a voice radio channel and responsive to a data channel request for assigning a cellular telephone to a shared data radio channel; and switching means coupled to each base site for coupling voice radio channels to the landline network and shared data radio channels to the data network.
Claim 3
Dependent Claim
105 words
The cellular telephone system according to claim 1, wherein said data is contained in one or more packets, and said control means includes buffer means for storing inbound packets received on a shared data radio channel by said transceiver means from a cellular telephone and storing outbound packets from said switching means for said cellular telephone, said control means reading out said inbound packets and coupling said read-out inbound packets to said switching means, and said control means reading out said outbound packets and coupling said read-out outbound packets to said transceiver means for transmission on said shared data radio channel to said cellular telephone.
Claim 4
Dependent Claim
71 words
The cellular telephone system according to claim 1, wherein said data is contained in one or more packets, and said control means monitors the number of inbound packets received from all active cellular telephones in a predetermined time interval and initiates handoff of one of said active cellular telephones to another base site when the number of inbound packets received in the predetermined time interval is less than a predetermined number.
Claim 5
Dependent Claim
59 words
The cellular telephone system according to claim 1, wherein said control means monitors the signal strength and bit-error rate of data received from a cellular telephone and initiates handoff of said cellular telephone to another base site when the signal strength is less than a predetermined signal strength or the bit-error rate is greater than a predetermined bit-error rate.
Claim 6
Dependent Claim
171 words
A packet-switched cellular telephone system for switching telephone calls between cellular telephones and a landline network and switching data packets between cellular telephones and a data network, comprising: a plurality of base sites each including: transceiver means having at least one signalling radio channel for receiving voice radio channel requests and packet-mode radio channel requests from cellular telephones, and having voice channels and shared packet-mode radio data channels for communications with the cellular telephones; and control means responsive to a voice radio channel request for assigning a cellular telephone to a voice radio channel and responsive to a packet-mode radio channel request for assigning a cellular telephone to a shared packet-mode radio channel; packet access point means for multiplexing packets from a shared packet-mode radio channel to the data network and demultiplexing packets from the data network to said shared packet-mode radio channel; and switching means coupled to each base site for coupling voice radio channels to the landline network and shared packet-mode radio channels to said packet access point means.
Claim 7
Dependent Claim
171 words
A packet-switched cellular telephone system for switching telephone calls between cellular telephones and a landline network and switching data packets between cellular telephones and a data network, comprising: a plurality of base sites each including: transceiver means having at least one signalling radio channel for receiving voice radio channel requests and packet-mode radio channel requests from cellular telephones, and having voice channels and shared packet-mode radio data channels for communications with the cellular telephones; and control means responsive to a voice radio channel request for assigning a cellular telephone to a voice radio channel and responsive to a packet-mode radio channel request for assigning a cellular telephone to a shared packet-mode radio channel; packet access point means for multiplexing packets from a shared packet-mode radio channel to the data network and demultiplexing packets from the data network to said shared packet-mode radio channel; and switching means coupled to each base site for coupling voice radio channels to the landline network and shared packet-mode radio channels to said packet access point means.
Claim 8
Dependent Claim
102 words
The packet-switched cellular telephone system according to claim 5, wherein said control means includes buffer means for storing inbound data packets received on a shared packet-mode radio channel by said transceiver means from a cellular telephone and storing outbound data packets from said switching means for said cellular telephone, said control means reading out said inbound data packets and coupling said read-out inbound data packets to said switching means, and said control means reading out said outbound data packets and coupling said read-out outbound data packets to said transceiver means for transmission on said shared packet-mode radio channel to said cellular telephone.
Claim 9
Dependent Claim
64 words
The packet-switched cellular telephone system according to claim 5, wherein said control means monitors the number of inbound data packets received from all active cellular telephones in a predetermined time interval and initiates handoff of one of said active cellular telephones to another base site when the number of inbound data packets received in the predetermined time interval is less than a predetermined number.
Claim 10
Dependent Claim
64 words
The packet-switched cellular telephone system according to claim 5, wherein said control means monitors the signal strength and the bit-error rate of inbound data packets received from a cellular telephone and initiates handoff of said cellular telephone to another base site when the signal strength is less than a predetermined signal strength or the bit-error rate is greater than a predetermined bit error rate.
Claim 11
Independent Claim
67 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a cellular packet-switched radio channel of a cellular telephone system, said method comprising the steps of: storing outbound data packets for each cellular telephone in buffer means; and sending a handoff message to a cellular telephone when the stored number of outbound data packets therefor is greater than a predetermined number.
Claim 12
Independent Claim
67 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a cellular packet-switched radio channel of a cellular telephone system, said method comprising the steps of: storing outbound data packets for each cellular telephone in buffer means; and sending a handoff message to a cellular telephone when the stored number of outbound data packets therefor is greater than a predetermined number.
Claim 13
Independent Claim
89 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a cellular packet-switched radio channel of a cellular telephone system, said method comprising the steps of: monitoring the number of inbound packets received from all active cellular telephones sharing the cellular packet-switched radio channel to determine an inbound rate of transfer of data packets; and sending a handoff message to one of the active cellular telephones when the determined inbound rate of transfer of data packets is less than a predetermined inbound rate.
Claim 14
Independent Claim
89 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a cellular packet-switched radio channel of a cellular telephone system, said method comprising the steps of: monitoring the number of inbound packets received from all active cellular telephones sharing the cellular packet-switched radio channel to determine an inbound rate of transfer of data packets; and sending a handoff message to one of the active cellular telephones when the determined inbound rate of transfer of data packets is less than a predetermined inbound rate.
Claim 15
Independent Claim
103 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a cellular packet-switched radio channel of a cellular telephone system, said method comprising the steps of: monitoring the number of inbound packets received from all active cellular telephones sharing the cellular packet-switched radio channel to determine an inbound rate of transfer of data packets; polling at least one of the active cellular telephones when the determined inbound rate of transfer is less than a predetermined inbound rate; and sending a handoff message to one of the active cellular telephones when the polled cellular telephone does not respond.
Claim 16
Independent Claim
103 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a cellular packet-switched radio channel of a cellular telephone system, said method comprising the steps of: monitoring the number of inbound packets received from all active cellular telephones sharing the cellular packet-switched radio channel to determine an inbound rate of transfer of data packets; polling at least one of the active cellular telephones when the determined inbound rate of transfer is less than a predetermined inbound rate; and sending a handoff message to one of the active cellular telephones when the polled cellular telephone does not respond.
Claim 17
Independent Claim
104 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a cellular packet-switched radio channel of a cellular telephone system, said method comprising the steps of: monitoring errors in data packets received from each cellular telephone sharing the cellular packet-switched radio channel to determine a bit-error rate therefor; determining the signal strength level of each cellular telephone on the cellular packet-switched radio channel; and sending a handoff message to a cellular telephone when the determined signal strength level is less than a predetermined signal strength level and the determined bit-error rate is greater than a predetermined bit-error rate.
Claim 18
Independent Claim
104 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a cellular packet-switched radio channel of a cellular telephone system, said method comprising the steps of: monitoring errors in data packets received from each cellular telephone sharing the cellular packet-switched radio channel to determine a bit-error rate therefor; determining the signal strength level of each cellular telephone on the cellular packet-switched radio channel; and sending a handoff message to a cellular telephone when the determined signal strength level is less than a predetermined signal strength level and the determined bit-error rate is greater than a predetermined bit-error rate.
Claim 19
Independent Claim
67 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a digital cellular radio channel of a cellular telephone system, said method comprising the steps of: storing outbound data packets for each cellular telephone in buffer means; and sending a handoff message to a cellular telephone when the stored number of outbound data packets therefor is greater than a predetermined number.
Claim 20
Independent Claim
67 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a digital cellular radio channel of a cellular telephone system, said method comprising the steps of: storing outbound data packets for each cellular telephone in buffer means; and sending a handoff message to a cellular telephone when the stored number of outbound data packets therefor is greater than a predetermined number.
Claim 21
Independent Claim
89 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a digital cellular radio channel of a cellular telephone system, said method comprising the steps of: monitoring the number of inbound packets received from all active cellular telephones sharing the digital cellular radio channel to determine an inbound rate of transfer of data packets; and sending a handoff message to one of the active cellular telephones when the determined inbound rate of transfer of data packets is less than a predetermined inbound rate.
Claim 22
Independent Claim
89 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a digital cellular radio channel of a cellular telephone system, said method comprising the steps of: monitoring the number of inbound packets received from all active cellular telephones sharing the digital cellular radio channel to determine an inbound rate of transfer of data packets; and sending a handoff message to one of the active cellular telephones when the determined inbound rate of transfer of data packets is less than a predetermined inbound rate.
Claim 23
Independent Claim
60 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a digital cellular radio channel of a cellular telephone system, said method comprising the steps of: monitoring the number of inbound packets received from all active cellular telephones sharing the digital cellular radio channel to determine an inbound rate of transfer of data packets;
Claim 24
Independent Claim
60 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a digital cellular radio channel of a cellular telephone system, said method comprising the steps of: monitoring the number of inbound packets received from all active cellular telephones sharing the digital cellular radio channel to determine an inbound rate of transfer of data packets;
Claim 25
Independent Claim
104 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a digital cellular radio channel of a cellular telephone system, said method comprising the steps of: monitoring errors in data packets received from each cellular telephone sharing the digital cellular radio channel to determine a bit-error rate therefor; determining the signal strength level of each cellular telephone on the digital cellular radio channel; and sending a handoff message to a cellular telephone when the determined signal strength level is less than a predetermined signal strength level and the determined bit-error rate is greater than a predetermined bit-error rate.
Claim 26
Independent Claim
104 words
A method of handoff for a plurality of cellular telephones each transceiving data packets and sharing a digital cellular radio channel of a cellular telephone system, said method comprising the steps of: monitoring errors in data packets received from each cellular telephone sharing the digital cellular radio channel to determine a bit-error rate therefor; determining the signal strength level of each cellular telephone on the digital cellular radio channel; and sending a handoff message to a cellular telephone when the determined signal strength level is less than a predetermined signal strength level and the determined bit-error rate is greater than a predetermined bit-error rate.
References Cited (Backward Citations)
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