US6791944B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile terminal and base station in a packet radio services network
Assignee: Google LLC
•
Filing: 1999-08-30
•
Granted: 2004-09-14
•
Expires: 2019-08-30
Abstract
Abstract A mobile terminal for communicating with a base station in a packet radio services network. The terminal has a processor for determining one of a plurality of channels for communication between the mobile terminal and the base station; for digitally coding speech to provide speech information; for assembling speech information into speech packets; and for generating channel allocation requests for a channel in which to send speech packets. A radio transmitter is provided for transmitting the requests and the packets to a base station in the network. A radio receiver receives identities of channels allocated by the base station for the mobile terminal to transmit on. The processor is responsive to each received channel allocation to determine that packets are sent on the allocated channel. In the GPRS since a channel is released when there is no packet to transmit, higher traffic levels can be obtained using the same number of radio channels.
Inventors
- 👤 Cristian Demetrescu
- 👤 Simon Fabri
- 👤 Said Tatesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:44
CPC Classifications
H; H04; H04W; H04W28/00; H04W28/02; H04W28/06; H04W28/065; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0059; H04L1/0001; H04L1/0009; H04L1/007; H04W72/00; H04W72/20; H04W72/23; H04W88/00; H04W88/02; H04W74/00; H04W74/08; H04W74/0866
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
177 words
A mobile terminal for communicating with a base station in a packet radio services network, said terminal comprising a processor for determining one of a plurality of channels for communication between the mobile terminal and the base station; for digitally coding speech to provide speech information; and for assembling speech information into speech packets; for generating channel allocation requests in which to send speech packets; a radio transmitter for transmitting the requests and the packets to a base station in the network; and a radio receiver for receiving identities of channels allocated by the base station for the mobile terminal to transmit on, said processor being responsive to each received channel allocation to determine that packets are sent on the allocated channel wherein if a request to send is not granted, the processor is arranged to discard speech information until a further request is granted and the further request is delayed by a predetermined period where the delay is increased if successive requests are not granted and where following a predetermined maximum delay, the delay is reduced.
Claim 2
Dependent Claim
177 words
A mobile terminal for communicating with a base station in a packet radio services network, said terminal comprising a processor for determining one of a plurality of channels for communication between the mobile terminal and the base station; for digitally coding speech to provide speech information; and for assembling speech information into speech packets; for generating channel allocation requests in which to send speech packets; a radio transmitter for transmitting the requests and the packets to a base station in the network; and a radio receiver for receiving identities of channels allocated by the base station for the mobile terminal to transmit on, said processor being responsive to each received channel allocation to determine that packets are sent on the allocated channel wherein if a request to send is not granted, the processor is arranged to discard speech information until a further request is granted and the further request is delayed by a predetermined period where the delay is increased if successive requests are not granted and where following a predetermined maximum delay, the delay is reduced.
Claim 3
Dependent Claim
39 words
A mobile terminal as claimed in claim 1 , wherein the processor is arranged to implement a layered protocol, and wherein each packet is given a network and transport layer header in a subnetwork dependent convergence protocol layer (SNDCP).
Claim 4
Dependent Claim
87 words
A mobile terminal in accordance with claim 1 further comprising a voice activity detector, wherein the processor is responsive to detection of voice activity by the voice activity detector, to generate a request for a channel allocation in which to send voice packets, and on receipt of a channel identity, to send an address header uncompressed on that channel and subsequently to send packets with compressed headers which do not contain the destination address on the identified channel, until the voice activity detector detects no voice activity.
Claim 5
Dependent Claim
84 words
A mobile terminal as claimed in claim 3 , wherein the processor is arranged to construct packets of an equal number n of frames, the processor being further arranged to implement a logical link layer protocol (LLC) which adds its own LLC header information comprising a service access point identifier defining speech service to each packet, and to divide the total LLC plus an SNDCP header into n parts of equal length and to place one header part before each frame in the packet.
Claim 6
Dependent Claim
49 words
A mobile terminal as claimed in claim 4 , wherein in the physical layer, in each frame, the header and the most important bits speech information are coded using a convolutional code, and a subset of important bits of the speech information are coded using a cyclic redundancy check.
References Cited (Backward Citations)
US4516239A
Cited
US4864564A
Cited
US4887265A
Cited
US5299198A
Cited
US5506848A
Cited
US5742640A
Cited
US5659541A
Cited
US5974106A
Cited
US5642354A
Cited
US5757772A
Cited
GB2306858A
Cited
JPH09200265A
Cited
WO1997032441A2
Cited
EP0841831A2
Cited
US6031832A
Cited
US6240083B1
Cited
WO1998044755A2
Cited
US6438122B1
Cited
US6359904B1
Cited
KR19980019518A
Cited
US6278706B1
Cited
US6130883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-09-14 | 2008-03-15 | 2008-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-09-14 | 2012-03-15 | 2012-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-09-14 | 2016-03-15 | 2016-09-14 | $7700.00 | Window Closed / Lapsed |