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AssigneeEnsemble Communications, Inc.
InventorsSheldon L. Gilbert, Rami Hadar, Israel J. Klein
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An adaptive time division duplexing (ATDD) method and apparatus for duplexing transmissions on a communication link in wireless communication systems. Communication link efficiency is enhanced by dynamically adapting to the uplink and downlink bandwidth requirements of the communication channels. Time slots are flexibly and dynamically allocated for uplink or downlink transmissions depending upon the bandwidth needs of a channel. Communication link bandwidth requirements are continuously monitored using sets of pre-determined bandwidth requirement parameters. Communication channels are configured to have either symmetric or asymmetric uplink/downlink bandwidths depending upon the needs of the channel. Channel bandwidth asymmetry can be configured alternatively in favor of the uplink transmissions (i.e., more time slots are allocated for uplink transmissions than for downlink transmissions) or in favor of the downlink transmissions (i.e., more time slots are allocated for downlink transmissions than for uplink transmissions). A myriad of time slot allocation schemes are possible. One simplified time slot allocation scheme uses a "frame-based" approach. A preferred channel bandwidth analysis technique is disclosed which monitors and updates bandwidth requirement parameters associated with communication sessions, base stations and cell cluster controllers. In accordance with this technique, a communication session is preferably assigned both an "initial" and an "actual" set of bandwidth parameters.
A method for adaptively duplexing transmissions in a communication link using a time division duplexing scheme wherein transmissions are communicated in an uplink direction during uplink time slots and wherein transmissions are communicated in a downlink direction during downlink time slots, comprising the steps of:
A method for monitoring and updating uplink and downlink bandwidth requirements of a selected base station in a wireless communication system, wherein the communication system includes a plurality of base stations arranged into a plurality of associated cell clusters, and wherein the uplink and downlink transmissions of each base station within a cell cluster is controlled by an associated cell cluster controller, comprising the steps of:
A method for monitoring and updating uplink and downlink bandwidth requirements of a plurality of communication links in a wireless communication system, wherein the communication system includes a plurality of base stations arranged into a plurality of associated cell clusters, and wherein the uplink and downlink transmissions of each base station within a cell cluster are controlled by an associated cell cluster controller, and wherein the transmissions occur during frames comprising N time slots wherein N.sub.1, N.sub.2, . . . N.sub.M are positive integers, and wherein ##EQU13## comprising the steps of:
An apparatus for adaptively duplexing transmissions in a communication link of a wireless communication system using a time division duplexing scheme wherein transmissions are communicated in an uplink direction during uplink time slots and wherein transmissions are communicated in a downlink direction during downlink time slots, comprising:
A method for duplexing transmissions in a communication link using a time division duplexing scheme wherein transmissions are communicated in an uplink direction during uplink time slots and wherein transmissions are communicated in a downlink direction during downlink time slots, comprising the steps of:
A method for adaptively duplexing uplink and downlink transmissions of a selected base station in a wireless communication system, wherein the communication system includes a plurality of base stations arranged into a plurality of respective and associated cell clusters, and wherein the uplink and downlink transmissions of each base station within a cell cluster are controlled by an associated cell cluster controller, comprising the steps of:
An apparatus for adaptively duplexing uplink and downlink transmissions of a selected base station in a wireless communication system, wherein the communication system includes a plurality of base stations arranged into a plurality of respective and associated cell clusters, and wherein the uplink and downlink transmissions of each base station within a cell cluster are controlled by an associated cell cluster controller, comprising:
A method for monitoring and updating uplink and downlink bandwidth requirements of a selected base station in a wireless communication system, wherein the communication system includes a plurality of base stations arranged into a plurality of respective and associated cell clusters, and wherein the uplink and downlink transmissions of each base station within a cell cluster are controlled by an associated cell cluster controller, comprising the steps of:
A method for monitoring and updating uplink and downlink bandwidth requirements of a plurality of communication links in a wireless communication system, wherein the communication system includes a plurality of base stations arranged into a plurality of respective and associated cell clusters, and wherein the uplink and downlink transmissions of each base station within a cell cluster are controlled by an associated cell cluster controller, and wherein the transmissions occur during frames comprising N time slots, comprising the steps of:
An apparatus for adaptively duplexing transmissions in a communication link of a wireless communication system using a time division duplexing scheme wherein transmissions are communicated in an uplink direction during uplink time slots and wherein transmissions are communicated in a downlink direction during downlink time slots, comprising:
Dependencies are inferred from the claim text.