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7598results about "Radio transmission for post communication" patented technology

Spatial multiplexing in a cellular network

The present invention provides methods and apparatus for implementing spatial multiplexing in conjunction with the one or more multiple access protocols during the broadcast of information in a wireless network. A wireless cellular network for transmitting subscriber datastream(s) to corresponding ones among a plurality of subscriber units located within the cellular network is disclosed. The wireless cellular network includes base stations and a logic. The base stations each include spatially separate transmitters for transmitting, in response to control signals, selected substreams of each subscriber datastream on an assigned channel of a multiple access protocol. The logic communicates with each of the base stations. The logic assigns an available channel on which to transmit each subscriber datastream. The logic routes at least a substream of each datastream to at least a selected one of the base stations. The logic also generates control signals to configure the at least a selected one of the base stations to transmit the selected substreams to a corresponding one among the plurality of subscriber units on the assigned channel. A subscriber unit for use in a cellular system is also disclosed. The subscriber unit includes: spatially separate receivers, a spatial processor, and a combiner. The spatially separate receivers receive the assigned channel composite signals resulting from the spatially separate transmission of the subscriber downlink datastream(s). The spatial processor is configurable in response to a control signal transmitted by the base station to separate the composite signals into estimated substreams based on information obtained during the transmission of known data patterns from at least one of the base stations. The spatial processor signals the base stations when a change of a spatial transmission configuration is required. The combiner combines the estimated substreams into a corresponding subscriber datastream.

Method for configuring and routing data within a wireless multihop network and a wireless network for implementing the same

A method for configuring a wireless network comprised of a control node and a multiplicity of individual nodes includes the steps of logically organizing the network into a plurality of bands Bi, wherein each of the bands Bi includes a plurality of the individual nodes and is located a number i of hops away from the control node, where i=0 through N, and N≧1, and then assigning a logical address to each of the individual nodes, and storing the assigned logical addresses in the respective individual nodes. The assigned logical address for each individual node includes a first address portion which indicates the band Bi in which that individual node is located, and a second address portion that identifies that node relative to all other individual nodes located in the same band. The network is preferably a packet-hopping wireless network in which data is communicated by transferring data packets from node-to-node over a common RF channel. Each of the individual nodes is preferably programmed to perform the step of comparing its own logical address to a routing logical address contained in each packet which it receives, and to either discard, re-transmit, or process the packet based upon the results of the comparison. The routing logical address contained in a received packet contains the full routing information required to route the packet from a sending node to a destination node along a communication path prescribed by the routing logical address. The control node is programmed to control the routing of packets by inserting the routing logical address into each packet which it transmit, detecting any unsuccessfully transmitted packets, detecting a faulty node in the communication path prescribed by the routing logical address in response to detecting an unsuccessfully transmitted packet, and changing the routing logical address of the unsuccessfully transmitted packet to a new routing logical address which prescribes a new communication path which does not include the detected faulty node. Also disclosed are a wireless network and a network node which are designed to implement the foregoing network configuration and/or routing methods.

Method for radio resource control

In order to control the use of physical radio resources, the physical radio resources are divided into chronologically consecutive frames (14), so that a frame contains slots (16, 17, 18) of various sizes, which slots represent a given share of the physical radio resources contained in the frame and can be individually allocated to different radio connections. The first dimension of a frame is time and the second dimension can be time, frequency or code. In the direction of the second dimension the slots represent various sizes, and a given first integral number of slots of the first size can be modularly replaced by another integral number of slots of another size. A certain number of consecutive frames form a superframe (19), in which case frames with corresponding locations in consecutive superframes are equal in slot division and allocations, if the data transmission demands do not change. Changes in the state of occupancy of the slots are possible at each superframe. In order to form an uplink connection, the mobile station sends a capacity request, where it indicates the type of requested connection and the demand of resources. In order to form a downlink connection, the base station subsystem sends a paging call, where it indicates the location in the superframe of the slots allocated to the connection. In order to indicate the state of occupancy, the base station subsystem maintains a superframe-size parametrized reservation table.
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