Temporary frame identification for ARQ in a reservation-slotted-ALOHA type of protocol
First Claim
1. In a mobile packet communications system using a reservation slotted-ALOHA protocol in which data frames are exchanged between a base station and mobile stations, a method of implementing automatic repeat request (ARQ), comprising the steps of assigning, to each data frame transmitted to a mobile station, a temporary frame identity (TFI);
- wherein the TFI assigned is unique among other TFIs assigned to data frames concurrently transmitted to other mobile stations;
including the assigned TFI in every data block in the data frame to which the TFI is assigned; and
resuming transmission of an uncompleted data frame, wherein transmission was interrupted, by the base station'"'"'s transmitting a predetermined message that includes the TFI assigned to the uncompleted data frame.
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Accused Products
Abstract
Automatic repeat request (ARQ) functionality in a cellular mobile packet data communication system using a reservation slotted-ALOHA protocol is provided by assigning a temporary frame identity (TFI) to each data frame transmitted to or from a mobile station. The assigned TFI is unique among concurrent frame transfer sequences in a cell, and may be assigned based on information in a data frame sent to the mobile station or based on information in a channel reservation message that precedes the data frame sent to the mobile station. The TFI may also be assigned based on information in a channel reservation message that precedes a data frame sent from the mobile station, and the TFI assigned is unique among concurrent frame transfer sequences in a cell. The TFI is included in every block belonging to a particular frame, a block being the unit of data on which ARQ is based. A partial data frame to be retransmitted in case of a transmission error contains only the blocks determined by the ARQ protocol type (e.g., selective or Go-back-N) used, whereby a primary block need not be added to identify the mobile station. Blocks belonging to frames destined for different mobile stations can be multiplexed on the downlink based on the TFI. The mobile station may include, in its random access request, an indication that a TFI is already assigned.
109 Citations
18 Claims
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1. In a mobile packet communications system using a reservation slotted-ALOHA protocol in which data frames are exchanged between a base station and mobile stations, a method of implementing automatic repeat request (ARQ), comprising the steps of assigning, to each data frame transmitted to a mobile station, a temporary frame identity (TFI);
- wherein the TFI assigned is unique among other TFIs assigned to data frames concurrently transmitted to other mobile stations;
including the assigned TFI in every data block in the data frame to which the TFI is assigned; and
resuming transmission of an uncompleted data frame, wherein transmission was interrupted, by the base station'"'"'s transmitting a predetermined message that includes the TFI assigned to the uncompleted data frame. - View Dependent Claims (2, 3, 4, 5, 6, 9)
- wherein the TFI assigned is unique among other TFIs assigned to data frames concurrently transmitted to other mobile stations;
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7. In a mobile packet communications system using a reservation slotted-ALOHA protocol in which data frames are exchanged between a base station and mobile stations, a method of implementing automatic repeat request (ARO), comprising the steps of:
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assigning, to each data frame transmitted to a mobile station, a temporary frame identity (TFI), wherein the TFI assigned is unique among other TFIs assigned to data frames concurrently transmitted to other mobile stations; including the assigned TFI in every data block in the data frame to which the TFI is assigned, wherein each data frame comprises a plurality of data blocks; and resuming transmission of an uncompleted data frame, wherein transmission was interrupted by an acknowledgment message erroneously transmitted by the mobile station, by the base station'"'"'s transmitting a predetermined message that includes the TFI assigned to the uncompleted data frame. - View Dependent Claims (8)
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10. In a mobile packet communications system using a reservation slotted-ALOHA protocol in which data frames are exchanged between a base station and mobile stations, a method of implementing automatic repeat request (ARQ), comprising the steps of assigning, to each data frame transmitted by a mobile station, a temporary frame identity (TFI);
- wherein the TFI is assigned based on information in a channel reservation message that precedes a data frame transmitted by the mobile station, the TFI assigned is unique among other TFIs assigned to data frames concurrently transmitted by other mobile stations;
including the assigned TFI in every data block in the data frame to which the TFI is assigned; and
resuming transmission of an uncompleted data frame, wherein transmission was interrupted, by the base station'"'"'s transmitting a predetermined message that includes the TFI assigned to the uncompleted data frame. - View Dependent Claims (11, 12, 13)
- wherein the TFI is assigned based on information in a channel reservation message that precedes a data frame transmitted by the mobile station, the TFI assigned is unique among other TFIs assigned to data frames concurrently transmitted by other mobile stations;
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14. In a mobile packet communications system using a reservation slotted-ALOHA protocol in which data frames are exchanged between a base station and mobile stations, a method of implementing automatic repeat request (ARO), comprising the steps of:
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assigning, to each data frame transmitted by a mobile station, a temporary frame identity (TFI), wherein the TFI is assigned based on information in a channel reservation message that precedes a data frame transmitted by the mobile station, and the TFI assigned is unique among other TFIs assigned to data frames concurrently transmitted by other mobile stations; including the assigned TFI in every data block in the data frame to which the TFI is assigned, wherein each data frame comprises a plurality of data blocks; and resuming transmission of an uncompleted data frame, wherein transmission was interrupted by an acknowledgment message erroneously transmitted by the mobile station, by the base station'"'"'s transmitting a predetermined message that includes the TFI assigned to the uncompleted data frame. - View Dependent Claims (15)
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16. In a mobile packet communications system using a reservation slotted-ALOHA protocol in which data frames are exchanged between a base station and mobile stations, a method of implementing automatic repeat request (ARO), comprising the steps of:
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assigning, to each data frame transmitted by a mobile station, a temporary frame identity (TFI), wherein the TFI is assigned based on information in a channel reservation message that precedes a data frame transmitted by the mobile station, and the TFI assigned is unique among other TFIs assigned to data frames concurrently transmitted by other mobile stations; including the assigned TFI in every data block in the data frame to which the TFI is assigned, wherein each data frame comprises a plurality of data blocks; and resuming transmission of an uncompleted data frame transfer, wherein transmission was interrupted by an acknowledgment message erroneously transmitted by the base station, by the mobile station'"'"'s carrying out the steps of;
transmitting a random access request;
receiving a channel reservation message; and
sending a predetermined message that includes the TFI assigned to the uncompleted data frame. - View Dependent Claims (17, 18)
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Specification