US5555260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decentralized base station for reducing bandwidth requirements for communications to and from radio transmitter-receivers in a telecommunications network
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1995-08-24
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Granted: 1996-09-10
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Expires: 2015-08-24
Abstract
Abstract A TDMA cellular mobile radio system has at least one network control unit, at least one radio transceiver, and at least one multiplexor for multiplexing and demultiplexing digitally encoded and compressed speech data transmitted between the network control unit and radio transceiver. The bandwidth of the speech data is reduced through compression. The bandwidth of the speech data required on a radio transceiver side of the multiplexor is further reduced by buffering the speech data arriving at the multiplexor at a relatively high modulation rate, retransmitting the buffered speech data at a relatively lower modulation rate, buffering the speech data arriving from the multiplexor at a relatively lower modulation rate, and retransmitting the buffered speech data at a relatively higher modulation rate.
Inventors
- 👤 Hans L. Rinnback
- 👤 Hakan M. Halen
- 👤 Per V. Israelsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:55
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0435; H04J; H04J3/00; H04J3/16; H04J3/1605; H04J3/1623; H04J3/1635; H04J3/1682; H04J3/1688; H04W; H04W88/00; H04W88/08; H04W88/085
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
224 words
An apparatus for reducing bandwidth requirements in a cellular TDMA telecommunications network comprising: at least one network control unit; at least one base station connected to the at least one network control unit, the at least one base station comprising a multiplexing means and at least one transceiver means; means for digitally encoding and compressing speech data to be transmitted to the at least one base station and outputting the digitally encoded and compressed speech data to the at least one network control unit; a first communications link between the at least one network control unit and the multiplexing means comprising a high speed link adapted to transmit at a speed of at least 1 Mbps; a second communications link between the multiplexing means and the at least one transceiver means comprising a low speed link adapted to transmit at a speed under 1 Mbps; and the multiplexing means comprising: buffering means for buffering the digitally encoded and compressed speech data being transmitted toward the at least one transceiver at a relatively higher transmission rate and retransmitting the buffered speech data at a relatively lower transmission rate; and buffering means for buffering the digitally encoded and compressed speech data arriving from the at least one transceiver at a relatively lower transmission rate and retransmitting the buffered speech data at a relatively higher transmission rate.
Claim 2
Independent Claim
224 words
An apparatus for reducing bandwidth requirements in a cellular TDMA telecommunications network comprising: at least one network control unit; at least one base station connected to the at least one network control unit, the at least one base station comprising a multiplexing means and at least one transceiver means; means for digitally encoding and compressing speech data to be transmitted to the at least one base station and outputting the digitally encoded and compressed speech data to the at least one network control unit; a first communications link between the at least one network control unit and the multiplexing means comprising a high speed link adapted to transmit at a speed of at least 1 Mbps; a second communications link between the multiplexing means and the at least one transceiver means comprising a low speed link adapted to transmit at a speed under 1 Mbps; and the multiplexing means comprising: buffering means for buffering the digitally encoded and compressed speech data being transmitted toward the at least one transceiver at a relatively higher transmission rate and retransmitting the buffered speech data at a relatively lower transmission rate; and buffering means for buffering the digitally encoded and compressed speech data arriving from the at least one transceiver at a relatively lower transmission rate and retransmitting the buffered speech data at a relatively higher transmission rate.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1, wherein the second communications link comprises a 2-wire interface.
Claim 4
Dependent Claim
14 words
The apparatus of claim 1, wherein the second communications link comprises a 4-wire interface.
Claim 5
Dependent Claim
18 words
The apparatus of claim 1, wherein the low speed link transmits at a rate of about 192 kbps.
Claim 6
Dependent Claim
14 words
The apparatus of claim 1, wherein the second communications link comprises two 2-wire pairs.
Claim 7
Dependent Claim
14 words
The apparatus of claim 1, wherein the second communications link comprises ISDN interface lines.
Claim 8
Dependent Claim
17 words
The apparatus of claim 1, wherein the second communications link comprises a high-bit-rate digital subscriber interface line.
Claim 9
Dependent Claim
26 words
The apparatus of claim 1, wherein the high speed link comprises a transmission link transmitting at a rate of about 2048 kbps according to GSM specifications.
Claim 10
Dependent Claim
30 words
The apparatus of claim 1, comprising: wherein the cellular telecommunications network is a GSM system and the at least one network control unit comprises at least one base station controller.
Claim 11
Dependent Claim
195 words
A cellular TDMA telecommunications network, comprising: a decentralized base station; at least one mobile services switching center; transcoder means provided remotely from the base station for digitally encoding and compressing speech data to be transmitted to the base station; at least one transceiver for communicating with mobile stations; a network control unit adapted to receive the digitally encoded and compressed speech data from said transcoder means; a transceiver interface for interfacing between the network control unit and the at least one transceiver; a first communications link connected between the network control unit and the transceiver interface, the first communications link being adapted to transmit the digitally encoded and compressed speech data at a relatively high transmission rate; at least one second communications link connected between the transceiver interface and each of the at least one transceivers, the at least one second communications link being adapted to transmit the digitally encoded and compressed speech data at a rate relatively lower than the transmission rate of the first communications link; means provided in the transceiver interface, for adapting the rate of the first communications link to the lower rate of the at least one second communications link.
Claim 12
Dependent Claim
195 words
A cellular TDMA telecommunications network, comprising: a decentralized base station; at least one mobile services switching center; transcoder means provided remotely from the base station for digitally encoding and compressing speech data to be transmitted to the base station; at least one transceiver for communicating with mobile stations; a network control unit adapted to receive the digitally encoded and compressed speech data from said transcoder means; a transceiver interface for interfacing between the network control unit and the at least one transceiver; a first communications link connected between the network control unit and the transceiver interface, the first communications link being adapted to transmit the digitally encoded and compressed speech data at a relatively high transmission rate; at least one second communications link connected between the transceiver interface and each of the at least one transceivers, the at least one second communications link being adapted to transmit the digitally encoded and compressed speech data at a rate relatively lower than the transmission rate of the first communications link; means provided in the transceiver interface, for adapting the rate of the first communications link to the lower rate of the at least one second communications link.
Claim 13
Dependent Claim
21 words
The decentralized base station of claim 10, wherein the at least one second communications link comprises 2 or 4 wire connections.
Claim 14
Dependent Claim
27 words
The decentralized base station of claim 10, wherein at least one of the at least one transceiver is disposed at a location remote from the transceiver interface.
Claim 15
Dependent Claim
28 words
The decentralized base station of claim 10, wherein the at least one of the at least one transceiver is disposed at a location proximate to the transceiver interface.
Claim 16
Dependent Claim
28 words
The decentralized base station of claim 10, wherein the cellular telecommunications network is a GSM system and the network control unit comprises at least one base station controller.
Claim 17
Dependent Claim
35 words
The decentralized base station of claim 10, wherein the high transmission rate of the first communications link is about 2 Mbps and the low transmission rate of the second communications link is about 192 kbps.
Claim 18
Dependent Claim
43 words
The decentralized base station of claim 10, wherein said at least one transceiver comprise a first connector for low speed remote connection adapted to be connected to said at least one second communications link and a second connector for high speed local connection.
References Cited (Backward Citations)
US4322844A
Cited
US4377860A
Cited
US4589110A
Cited
US4589108A
Cited
US4660196A
Cited
US4797883A
Cited
US4771424A
Cited
EP0412583A2
Cited
EP0538546A2
Cited
US4922484A
Cited
US5029163A
Cited
US4987570A
Cited
US4965787A
Cited
US4975771A
Cited
US4964095A
Cited
US4995036A
Cited
US4965796A
Cited
US5161152A
Cited
US5235632A
Cited
EP0471246A2
Cited
US5111454A
Cited
US5278827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-10 | 2000-03-11 | 2000-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-10 | 2004-03-11 | 2004-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-10 | 2008-03-11 | 2008-09-10 | $7700.00 | Window Closed / Lapsed |