Method for reduced resource usage in system synchronization, data delivery and asynchronous real-time access mobile communications systems with multiple low complexity terminals
AssigneeVodafone Holding GmbH
InventorsStefan Krone, Gerhard Fettweis, Walter Nitzold
Life of this patent
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Abstract
A radio communication method and a corresponding system are described. Time frequency resources are divided into a grid of resources. For communicating with a plurality of non-synchronized terminals the timing offset of each terminal is measured and a joint message is asynchronously transmitted to a subset of terminals, wherein the subset comprises at least two terminals.
Claims14
A radio communication method for communicating between locally fixed base stations and terminals, where an available radio resource is divided into a grid of radio resource units, comprising the steps of:
- allocating at a base station a plurality of at least two blocks of radio resource units, each block of allocated radio resource units comprising at least two radio resource units consecutive in time;
- and
- at the base station, receiving a plurality of scheduled messages in the allocated plurality of at least two blocks of radio resource units, each message transmitted asynchronously in time or in frequency by one of a corresponding plurality of terminals;
- measuring at least one of a timing offset from the beginning of the block of allocated radio resource units or a frequency offset of each of the messages;
- determining a subset of at least two terminals having one of the timing offset within one predefined range or the frequency offset within one predefined range, the predefined range of timing offset exceeding the duration of one radio resource unit and the predefined range of frequency offset exceeding the frequency bandwidth of one radio resource unit;
- and
- transmitting a multicast message from the base station to the determined subset of at least two terminals.
A radio communication system comprising locally fixed base stations and terminals, and wherein an available radio resource is divided into a grid of radio resource units, wherein a base station comprises means for performing the steps of:
- allocating at a base station a plurality of at least two blocks of radio resource units, each block of allocated radio resource units comprising at least two radio resource units consecutive in time or adjacent in frequency;
- and
- at the base station, receiving a plurality of scheduled messages in the allocated plurality of at least two blocks of radio resource units, each message transmitted asynchronously in time or in frequency by one of a corresponding plurality of terminals;
- measuring at least one of a timing offset from the beginning of the block of allocated radio resource units or a frequency offset of each of the messages;
- determining a subset of at least two terminals having one of the timing offset within one predefined range or the frequency offset within one predefined range, the predefined range of timing offset exceeding the duration of one radio resource unit and the predefined range of frequency offset exceeding the frequency bandwidth of one radio resource unit;
- and
- transmitting a multicast message from the base station to the determined subset of at least two terminals.
Dependencies are inferred from the claim text.