EP0687078A2
Expired / Lapsed
EP
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A system for transmitting packet data in radio telephone TDMA systems
Assignee: Nokia Oyj
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Filing: 1995-06-05
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Granted: —
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Expires: 2015-06-05
Abstract
Abstract The invention relates to a method for transmitting packet data in a cellular system. The number of time slots in a TDMA frame dedicated for packet transmission varies according to transmission needs and each logical channel consisting of corresponding time slots in consecutive TDMA frames is independent of the other logical channels. A data packet is encoded in an information channel frame consisting of N-1 information bursts, and between the frames there can be an acknowledge/retransmission request burst (ARQ) reporting that a received frame was error-free or requesting retransmission. Thus, the information channel consists of repeated sequences of N bursts. Also disclosed are the structure of a packet paging burst (PP), packet random access burst (PRA), packet access grant burst (PAG), acknowledge/retransmission request burst (ARQ) as well as the use of the bursts in starting and maintaining the transmission.
Inventors
- 👤 Jari Hamalainen
- 👤 Arto Karppanen
- 👤 Zhi Chun Honkasalo
- 👤 Harri Jokinen
- 👤 Wang Ling
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:34
CPC Classifications
H; H04; H04W; H04W72/00; H04W72/20; H04W72/23; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2643; H04B7/2656; H04W68/00; H04W72/21
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
83 words
A time division multiple access (TDMA) radio telephone system for transmitting packet data including a base station and a mobile station, at least one logical channel comprising a TDMA slot for packet data communication between the base station and the mobile state, the at least one logical channel having a control channel (C) comprising slots temporally spaced apart by a group of consecutive slots, and an information channel (I) comprising the group of consecutive slots separating the slots comprising the control channel (C).
Claim 2
Dependent Claim
22 words
A system according to claim 1, wherein the control channel (C) includes an acknowledge/retransmission request burst (ARQ) for indicating error-free received data.
Claim 3
Dependent Claim
50 words
A system according to claim 1 or claim 2, wherein the logical channel is a downlink logical channel for transmitting from the base station to the mobile station, and the control channel (C) is capable of transmitting packet paging (PP) data for informing the mobile station of incoming packet data.
Claim 4
Dependent Claim
33 words
A system according to claim 3, wherein the control channel (C) is capable of transmitting a packet access grant PAG signal for acknowledging a channel reservation request (PRA) transmitted from the mobile station.
Claim 5
Dependent Claim
28 words
A system according to claim 4, wherein the packet access grant (PAG) signal includes a bitmap indicating which time slots have been reserved for uplink packet data transmission.
Claim 6
Dependent Claim
29 words
A system according to claim 3 or claim 4, wherein the packet paging (PP) data includes a bitmap indicating which time slots are reserved for downlink packet data transmission.
Claim 7
Independent Claim
42 words
A system according to any preceding claim, responsive to a channel reservation request (PRA) in the form of a system access type burst and including information on how many time slots the mobile station wants to be reserved for packet data transmission.
Claim 8
Dependent Claim
38 words
A system according to claim 4 wherein in the downlink direction the acknowledge/retransmission request burst (ARQ) is part of a combined control channel burst (C) which includes both a packet paging (PP) and a packet access grant (PAG).
Claim 9
Dependent Claim
30 words
A system according to claim 3, wherein in the downlink direction the acknowledge/retransmission request burst (ARQ) is part of a control burst (C) which also includes a packet paging (PP).
Claim 10
Dependent Claim
31 words
A system according to claim 2 wherein in the downlink direction the acknowledge/retransmission request burst (ARQ) is part of a control burst (C) which also includes a packet access grant (PAG).
Claim 11
Independent Claim
29 words
A system according to any of claims 8, 9 or 10, wherein the control burst (C) includes a bitmap indicating free and reserved logical channels in the uplink direction.
Claim 12
Independent Claim
48 words
A system according to claims 9 and 10 wherein the packet paging (PP) and the packet access grant (PAG) signal are sent in alternate time slots of the control channel (C) and both bursts include an identifier with which a mobile station can distinguish one from the other.
Claim 13
Independent Claim
52 words
A system according to claims 9 and 10 wherein only packet access grant (PAG) signals are sent in the time slots of the control channel (C) if there are no packet pagings (PP) to send and the burst includes an identifier with which a mobile station can distinguish one from the other.
Claim 14
Independent Claim
95 words
A system according to any preceding claim wherein for transmitting packet data from a mobile station to a base station the mobile station is adapted to monitor control bursts transmitted on the downlink channel until a free channel dedicated for information transfer is identified in the bitmap, in a time slot of said identified channel the mobile station is adapted to transmit a channel reservation request (PRA), and in response to receiving a packet access grant (PAG) signal from the base station the mobile station is adapted to transmit packet data on the identified channel.
Claim 15
Dependent Claim
37 words
A system according to claim 14, wherein the channel reservation request (PRA) signal comprises data indicative of a mobile station identifier, the number of time slots required for packet data transmission, and the priority of the request.
Claim 16
Dependent Claim
28 words
A system according to claim 15, wherein the channel reservation request (PRA) signal further comprises data indicative of whether or not the time slots have to be consecutive.
Claim 17
Dependent Claim
26 words
A system according to any claim dependent on claim 3 , wherein a mobile station listens to packet pagings (PP) only on channel assigned to it.
Claim 18
Dependent Claim
40 words
A system according to claim 17 wherein on said channel, packet pagings (PP) are transmitted only in predetermined control time slots known to the mobile station and the mobile station listens to packet pagings (PP) only during those time slots.
Claim 19
Dependent Claim
48 words
A system according to any claim dependent on claim 3, wherein a mobile station listens to normal paging calls of the system for an identifier indicating an incoming packet data transmission, and responsive to detection of said identifier the mobile station starts listening to packet data pagings (PP).
Claim 20
Dependent Claim
32 words
A system according to claim 7, wherein the channel reservation request (PRA) signal includes an identifier indicating how many information channel time slots there has to be immediately one after the other.
Claim 21
Dependent Claim
25 words
A system according to any claim dependent on claim 3 wherein a packet paging (PP) is transmitted in every time slot of a TDMA frame.
References Cited (Backward Citations)
No citation records indexed.
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