System for transmitting packet data in radio telephone TDMA systems
First Claim
1. A time division multiple access (TDMA) radio telephone system for transmitting packet data including:
- a base station and a mobile station, andat least one logical channel comprising TDMA slots for transmitting packet data communication between the base station and the mobile station, individual ones of the TDMA slots of the at least one logical channel occurring in a succession of physical TDMA frames,the at least one logical channel having a control channel (C) comprising slots that are temporally spaced apart by a group of consecutive slots, and an information channel (I) comprising the group of consecutive slots that occur in successive physical TDMA frames and that separate the slots comprising the control channel (C), wherein the control channel (C) includes an acknowledge/retransmission request burst (ARQ) for indicating error-free received data.
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Accused Products
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.
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Citations
39 Claims
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1. A time division multiple access (TDMA) radio telephone system for transmitting packet data including:
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a base station and a mobile station, and at least one logical channel comprising TDMA slots for transmitting packet data communication between the base station and the mobile station, individual ones of the TDMA slots of the at least one logical channel occurring in a succession of physical TDMA frames, the at least one logical channel having a control channel (C) comprising slots that are temporally spaced apart by a group of consecutive slots, and an information channel (I) comprising the group of consecutive slots that occur in successive physical TDMA frames and that separate the slots comprising the control channel (C), wherein the control channel (C) includes an acknowledge/retransmission request burst (ARQ) for indicating error-free received data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A time division multiple access (TDMA) radio telephone system for transmitting packet data including:
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a base station and a mobile station, and at least one logical channel comprising TDMA slots for transmitting packet data communication between the base station and the mobile station, individual ones of the TDMA slots of the at least one logical channel occurring in a succession of physical TDMA frames, the at least one logical channel having a control channel (C) comprising slots that are temporally spaced apart by a group of consecutive slots, and an information channel (I) comprising the group of consecutive slots that occur in successive physical TDMA frames and that separate the slots comprising the control channel (C), 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, and wherein the packet paging (PP) data includes a bitmap indicating which time slots are reserved for downlink packet data transmission. - View Dependent Claims (14, 15, 16)
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17. A time division multiple access (TDMA) radio telephone system for transmitting packet data including:
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a base station and a mobile station, and at least one logical channel comprising TDMA slots for transmitting packet data communication between the base station and the mobile station, individual ones of the TDMA slots of the at least one logical channel occurring in a succession of physical TDMA frames, the at least one logical channel having a control channel (C) comprising slots that are temporally spaced apart by a group of consecutive slots, and an information channel (I) comprising the group of consecutive slots that occur in successive physical TDMA frames and that separate the slots comprising the control channel (C), 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, 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, and wherein the packet access grant (PAG) signal includes a bitmap indicating which time slots have been reserved for uplink packet data transmission.
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18. A time division multiple access (TDMA) radio telephone system for transmitting packet data including:
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a base station and a mobile station, and at least one logical channel comprising TDMA slots for transmitting packet data communication between the base station and the mobile station, the at least one logical channel having a control channel (C) comprising slots that are 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), 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, and wherein the packet paging (PP) data includes a bitmap indicating which time slots are reserved for downlink packet data transmission, wherein a mobile station listens to normal paging calls of the system for an identifier indicating an incoming packet data transmission, and responsive to a detection of said identifier the mobile station starts listening to said packet paging (PP) data.
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- 19. A system for the radio transmission of packet data in a digital time division multiple access (TDMA) based cellular system of a type that includes at least one base station and at least one mobile station, wherein downlink direction logical channels from a base station to a mobile station comprise channels for the transmission of information (I) and control channels (C) including a paging channel for sending packet paging (PP) data with which the network informs the mobile station about an incoming packet data transmission and also a reservation request acknowledge channel on which the network transmits a packet access grant (PAG) to acknowledge a channel reservation request (PRA) transmitted by a mobile station on an uplink direction logical channel from the mobile station to the base station, wherein a number of time slots in a TDMA frame dedicated for packet data transmission is variable according to packet data transmission needs, wherein packet data is encoded into an information channel frame comprising N-1 information bursts and between information channel frames there is one control channel (C) burst, wherein the information transmission channel frames and the control channel bursts form N burst sequences, and wherein on the control channel is transmitted an acknowledge/retransmission request (ARQ) burst reporting one of that a received frame was error-free or requesting retransmission.
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39. A time division multiple access (TDMA) radio telephone system for transmitting packet data, comprising:
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a base station and N packet data mobile stations, and at least N logical channels each comprising M TDMA time slots that define a logical TDMA frame for transmitting packet data communications between the base station and individual ones of said N mobile stations, individual ones of said M TDMA time slots of a logical TDMA frame occurring during a same physical time slot number in a succession of physical TDMA frames;
whereineach of said at least N logical channels comprises a control channel (C) and an information channel (I), said control channel (C) being transmitted during physical time slots that are temporally spaced apart by M-1 consecutive same numbered physical time slots of M-1 consecutive physical TDMA frames, said information channel (I) being transmitted during same numbered M-1 consecutive physical time slots of said M-1 consecutive TDMA physical frames; and
whereinat least one of said N logical channels is used for transmitting packet data communications between the base station and an individual one of said N mobile stations.
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Specification