Adaptive digital wireless communications network apparatus and process
First Claim
1. In a single channel, star configuration, wireless digital communication network of cellular topology wherein a central unit is radio frequency linked to a plurality of remote units and multiple access is synchronously controlled by the central unit through a time division multiplexed cycle,wherein the improvement comprises:
- the cycle having a total cycle time of variable duration divided into two phases, one phase being an up-link phase and the other phase being a down-link phase which follows the up-link phase, each phase having a plurality of time slots in which information is transferred from the central unit to the remote units and from the remote units to the central unit,in the up-link phase, a variable number of fixed size data transfer time slots, each pre-assigned on request of a remote unit in an up-link phase of an immediately preceding cycle for use by the requesting remote in uploading data to the central unit in the up-link phase of the next succeeding cycle, andin the down-link phase, a variable number of variable size data transfer time slots for downloading data from the central unit to selected ones of the remote units.
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Abstract
A single channel wireless digital communication network [10] has a cellular topology which includes a central unit [12] ("CW") controlling communications with a plurality of remote units [14] ("TU") in a star configuration. Network access is synchronously controlled through a time division multiplexed cycle [20] of variable total duration having an up-link phase [21] of a variable number of fixed size time slots [25, 27, 27a], each pre-assigned by reservation by a remote unit, and a down-link phase [22] of a variable number of variable size slots [31a, 31b] which are adaptively utilized. The CU adaptively manages all slot assignments according to a variety of parameters. RU up-link slot reservations are confirmed by the CU in a variety of ways. During the up-link phase, RU'"'"'s which did not reserve a slot on the previous up-link cycle are temporarily suspended and are then polled or periodically tested for re-entry. A repeater unit [15] ("RU") having a back-to-back coupled ccu-tu pair operates as a minicell within the major cell where major cell coverage is not broad enough to reach all major cell TU'"'"'s.
381 Citations
50 Claims
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1. In a single channel, star configuration, wireless digital communication network of cellular topology wherein a central unit is radio frequency linked to a plurality of remote units and multiple access is synchronously controlled by the central unit through a time division multiplexed cycle,
wherein the improvement comprises: -
the cycle having a total cycle time of variable duration divided into two phases, one phase being an up-link phase and the other phase being a down-link phase which follows the up-link phase, each phase having a plurality of time slots in which information is transferred from the central unit to the remote units and from the remote units to the central unit, in the up-link phase, a variable number of fixed size data transfer time slots, each pre-assigned on request of a remote unit in an up-link phase of an immediately preceding cycle for use by the requesting remote in uploading data to the central unit in the up-link phase of the next succeeding cycle, and in the down-link phase, a variable number of variable size data transfer time slots for downloading data from the central unit to selected ones of the remote units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. In a single channel, star configuration, wireless digital communication network of cellular topology wherein a central unit is radio frequency linked to a plurality of remote units and multiple access is synchronously controlled by the central unit through a time division multiplexed cycle,
wherein the improvement comprises: -
the cycle having a total cycle time of variable duration divided into two phases, one phase being an up-link phase and the other phase being a down-link phase which follows the up-link phase, each phase having a plurality of time slots in which information is transferred from the central units to the remote units and from the remote units to the central units, in the up-link phase, a variable number of fixed size time slots, each pre-assigned on request of a remote unit in a prior up-link phase for use by the requesting remote unit in uploading information to the central unit in the next up-link phase, in the down-link phase, a variable number of variable size time slots for downloading information from the central unit to selected ones of the remote units the central unit and its associated plurality of remote units forming a major cell, a repeater unit having a local remote unit-local central unit pair coupled back to back to operate as a mini-cell within the major cell, and frames from the major cell central unit received by the local remote unit of the back to back pair being passed through a UART channel of the local remote unit to a UART channel of the local central unit which in turn acts as a central unit to other remote units in the minicell and vice versa whereby the local remote unit acts as a regular remote unit in the major cell.
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23. In a single channel, star configuration, wireless digital communication network of cellular topology wherein a central unit is radio frequency linked to a plurality of remote units and multiple access is synchronously controlled by the central unit through a time division multiplexed cycle,
wherein the improvement comprises: -
the cycle having a total cycle time of variable duration divided into two phases, one phase being an up-link phase and the other phase being a down-link phase which follows the up-link phase, each phase having a plurality of time slots in which information is transferred from the central unit to the remote units and from the remote units to the central unit, in the up-link phase, a variable number of fixed size data transfer time slots for use in uploading data information to the central unit, and, in the down-link phase, a variable number of variable size time slots for use in downloading data information to the remote units, and the up-link variable being adaptively allocated by the central unit on demand by remote units with non-requesting units being temporarily suspended from the entire up-link phase of the cycle of the network until a predetermined condition is satisfied. - View Dependent Claims (24, 25)
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26. In a process of a central unit, radio frequency linked in a star configuration to a plurality of remote units, synchronously controlling multiple access of the remote units to a single channel, wireless, digital, communication network of cellular topology through a cyclic time division multiplexed process,
wherein the improvement comprises the steps of: -
providing a total cycle time of variable duration, dividing the cycle into two phases, one phase being an up-link phase and the other phase being a down-link phase which follows the up-link phase, each phase having a plurality of time slots in which information is transferred from the central unit to the remote units and from the remote units to the central unit, pre-assigning each of a variable number of fixed size up-link phase data transfer time slots on reservation by a remote unit in an up-link phase of an immediately preceding cycle for use by the reserving remote unit in uploading data to the central unit in the up-link phase of the next succeeding cycle, and providing a variable number of variable size down-link phase data transfer time slots for downloading data from the central unit to selected ones of the remote units. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 48)
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47. In a process of a central unit, radio frequency linked in a star configuration to a plurality of remote units, synchronously controlling multiple access of the remote units to a single channel, wireless, digital, communication network of cellular topology through a cyclic time division multiplexed process,
wherein the improvement comprises the steps of: -
providing a total cycle time of variable duration, dividing the cycle into two phases, one phase being an up-link phase and the other phase being a down-link phase which follows the up-link phase, each phase having a plurality of time slots in which information is transferred from the central unit to the remote units and from the remote units to the central unit, pre-assigning each of a variable number of fixed size up-link phase time slots on reservation by a remote unit in a prior up-link phase for use by the requesting remote unit in uploading information to the central unit in the next up-link phase, providing a variable number of variable size down-link phase time slots for downloading data from the central unit to selected ones of the remote units configuring the central unit and its associated plurality of remote units as a major cell, providing a repeater unit having a local remote unit-local central unit pair coupled back to back to operate as a mini-cell within the major cell, and passing frames from the major cell central unit received by the local remote unit of the back to back pair through a UART channel of the local remote unit to a UART channel of the local central unit which in turn operates as a central unit to other remote units in the minicell and vice versa whereby the local remote unit operates as a regular remote unit in the major cell.
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49. In a single channel, star configuration, wireless digital communication network of cellular topology wherein a central unit is radio frequency linked to a plurality of remote units and multiple access is synchronously controlled by the central unit through a time division multiplexed cycle,
wherein the improvement comprises: -
the cycle having a total cycle time of variable duration divided into two phases, one phase being an up-link phase and the other phase being a down-link phase which follows the up-link phase, each phase having a plurality of time slots in which information is transferred from the central unit to the remote units and from the remote units to the central unit, in the up-link phase, a variable number of fixed size data transfer time slots, each pre-assigned on request of a remote unit in one up-link phase of a cycle for use by the requesting remote in uploading data to the central unit in another up-link phase of a cycle, and in the down-link phase, a variable number of variable size data transfer time slots for downloading data from the central unit to selected ones of the remote units.
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50. In a single channel, star configuration, wireless digital communication network of cellular topology wherein a central unit is radio frequency linked to a plurality of remote units and multiple access is synchronously controlled by the central unit through a time division multiplexed cycle,
wherein the improvement comprises: -
the cycle having a total cycle time of variable duration divided into two phases, one phase being an up-link phase and the other phase being a down-link phase which follows the up-link phase, each phase having a plurality of time slots in which information is transferred from the central unit to the remote units and from the remote units to the central unit, in the up-link phase, a variable number of data transfer time slots, each pre-assigned on request of a remote unit in an up-link phase of an immediately preceding cycle for use by the requesting remote in uploading data to the central unit in the up-link phase of the next succeeding cycle, and in the down-link phase, a variable number of variable size data transfer time slots for downloading data from the central unit to selected ones of the remote units.
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Specification