Method for reduced-overhead short message transmission

摘要

For applications with very small data activities, connection of a UE to a wireless network for sending or receiving such small data traffic increments via conventional connection set-up processes is quite inefficient in terms of spectral resource utilization. The invention provides a new connectionless methodology for transmission of such small data increments between a UE and a serving eNB. In particular, the invention methodology contemplates identifying a set of preamble sequences among the pool of preamble sequences provided for access requests from a UE to an eNB via the Random Access Channel as corresponding to a request from the UE for access to transmit an increment of data smaller than a predetermined threshold data size. When a UE has data traffic to transmit of a size smaller than the predetermined threshold size, it selects one of the preamble sequences in the identified set and sends an access request, using the selected preamble sequence, to a serving eNB via the Random Access Channel. Upon receipt of the access request from the UE, the eNB determines an appropriate RF resource for the data increment sought to be transmitted by the UE, based on the use of the selected preamble sequence sent by the UE, and schedules an uplink connection for the transmission of that data increment by the UE.

主权项

1. A method in a wireless communication system comprising:
identifying a set of access preamble sequences used for transmitting a request in a wireless access channel as corresponding to a request for access to transmit an increment of data smaller than a predetermined threshold data size; causing a mobile station having data to transmit of a size smaller than the predetermined threshold size to select one of the access preamble sequences in the identified set for sending an access request, for transmission of said data, to a serving access node via an access channel; and causing the serving access node to allocate a transmission resource for connectionless transmission of said data based on the selected access preamble sequence sent from the mobile station; wherein the identified access preamble sequences are subdivided into multiple sub-groups corresponding to defined granularity in transmission characteristics of the data offered for transmission by the mobile station; wherein access preamble sequences in one of the sub-groups correspond to particular RF conditions existent at the mobile station offering the data for transmission; and wherein a subset of the RF conditions access preamble sequences is established to provide feedback from the mobile station to an access node of the wireless system in respect to RF conditions existent at the mobile station in respect to a paging message from the access node to the mobile station.