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US 6,205,133 B1Granted
Flexible wideband architecture for use in radio communications systems
AssigneeEricsson Inc.
InventorRonald L. Bexten
Life of this patent
Estimating the term…
Abstract
A wideband digital architecture for use in radio communications systems. In an exemplary embodiment, a central hub station is coupled by high speed digital data transports to multiple distributed radio transceivers. The radio transceivers are designed to perform relatively little signal processing, while the central hub is designed to perform computationally intensive signal processing tasks. By exchanging wideband data between the radio transceivers and the hub, by centralizing key system resources at the hub, and by adaptively allocating the system resources in accordance with actual system usage, the radio architecture of the present invention maximizes overall system capacity, flexibility, and resource usage efficiency while minimizing the overall system cost.
Claims20
A radio communications system, comprising:
- a plurality of distributed radio transceivers, wherein each of said transceivers includes a wideband radio transmitter for transmitting multiple information signals on multiple frequency channeling multiple system users, and wherein each of said transceivers includes a wideband radio receiver for receiving multiple information signals on multiple frequency channels from the multiple system users;
- a plurality of high speed data transports, each one of said data transports connected to a corresponding one of said transceivers, for carrying wideband signals containing multiple information signals;
- and
- a hub station, connected to each one of said data transports and exchanging wideband signals with each of one said transceivers, wherein said hub station includes a) a downlink channelizer for coupling information signals received from a mobile switching center to said data transports, b) an uplink channelizer for coupling information signals received at said data transports to the mobile switching center, and c) a resource manager for monitoring system activity and for controlling said downlink channelizer and said uplink channelizer to adaptively allocate and utilize channelizer resources in selecting and processing information signals.
1 more element
A radio transceiver, comprising:
- a wideband radio transmitter for simultaneously transmitting multiple information signals on multiple frequency channels to multiple mobile stations in a radio communications system;
- a wideband radio receiver for simultaneously receiving multiple information signals on multiple frequency channels from the multiple mobile stations in the system,
- a high speed data transport interface for exchanging, through a high speed data transport, wideband signals containing multiple information signals with a hub station in the radio communications system;
- and
- an uplink channelizer for converting wideband frequency-division multiplexed signals received at the transceiver to time-division multiplexed signals which are delivered to the hub station.
2 more elements
A radio transceiver, comprising:
- a wideband radio transmitter for simultaneously transmitting multiple information signals on multiple frequency channels to multiple mobile stations in a radio communications system;
- a wideband radio receiver for simultaneously receiving multiple information signals on multiple frequency channels from the multiple mobile stations in the system,
- a high speed data transport interface for exchanging, through a high speed data transport, wideband signals containing multiple information signals with a hub station in the radio communications system;
- and
- a downlink channelizer for converting time-division multiplexed signals received from the hub station to wideband frequency-division multiplexed signals which are transmitted to the mobile stations.
2 more elements
A hub station, comprising:
- a plurality of high speed data transport interfaces for receiving a plurality of wideband uplink signals, each wideband uplink signal containing multiple uplink information signals, from a plurality of distributed radio transceivers and for transmitting a plurality of wideband downlink signals, each wideband downlink signal containing multiple downlink information signals, to the plurality of distributed radio transceivers;
- a communication interface for transmitting a formatted uplink signal containing multiple uplink information signals to a mobile switching center and for receiving a formatted downlink signal containing multiple downlink information signals from the mobile switching center;
- an uplink channelizer disposed between said high speed data transport interfaces and said communication interface for processing uplink information signals received from the distributed radio transceivers and for arranging selected uplink information signals to form a formatted uplink signal which is delivered to the mobile switching center;
- a downlink channelizer disposed between said communication interface and said high speed data transport interfaces for processing downlink information signals received from the mobile switching center and for arranging selected downlink information signals to form a plurality of wideband downlink signals which are delivered to the distributed radio transceivers;
- and
- a resource manager coupled to said uplink and downlink channelizers for monitoring system activity and for controlling said uplink and downlink channelizers to adaptively allocate and utilize channelizer components in selecting, processing, and arranging the uplink and downlink information signals.
3 more elements
A method for conducting radio communications in a system including a centralized hub station and a plurality of distributed radio transceivers, comprising the steps of:
- using a plurality of high speed data transports to pass wideband frequency division multiplexed signals, each wideband frequency division multiplexed signal including a number of information signals modulated on a number of carrier frequencies, serially between the hub station and the distributed radio transceivers;
- continually measuring system activity;
- and
- dynamically allocating, based on said step of measuring, hub station resources in processing and directing the information signals
- wherein each of the distributed radio transceivers includes a wideband radio transmitter for transmitting multiple information signals on multiple frequency channels to multiple system users and a wideband radio receiver for receiving multiple information signals on multiple frequency channels from the multiple system users,
- wherein the centralized hub station includes a downlink channelizer for coupling information signals received from a mobile switching center to the data transports and an uplink channelizer for coupling information signals received from the data transports to the mobile switching center, and
- wherein said step of dynamically allocating hub station resources includes the step of controlling the downlink channelizer and the uplink channelizer in passing information signals between the distributed radio transceivers and the hub station.
4 more elements
Dependencies are inferred from the claim text.