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US 6,487,420 B1Granted
Adaptive rach power determination for mobile telecommunications user equipment unit
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorErik Jönsson
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AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorErik Jönsson
Estimating the term…
A transmit power value (PRACH) for a connection request message (RACH) from a mobile user equipment unit (20) to a telecommunications network (18) is determined using a target ratio of received energy to interference value [(Eb/I0)RACH—target] and a modification factor [(Eb/I0)MEAN—DELTA]. The modification factor is a sliding mean differential between the target ratio and an actual ratio [(Eb/I0)ACTUAL] of received energy to interference as determined by the telecommunications network. The modification factor allows for the calculation of the transmit power for the connection request message to be adaptive with respect to a changing characteristic of the mobile user equipment unit (e.g., aging of the mobile user equipment unit). In one embodiment, the transmit power value determination is made at the mobile user equipment unit.
A mobile user equipment unit having an on-board unit which makes a calculation of a transmit power for a connection request message to a telecommunications network by evaluating the expression:
A method of operating a mobile user equipment unit which transmits a connection request message to a telecommunications network, the method comprising:
A mobile user equipment unit which has an on-board unit which makes a calculation of a transmit power for a connection request message to a telecommunications network, wherein the on-board unit makes the calculation of the transmit power using a target ratio of received energy to interference value and a modification factor, the modification factor being a differential between the target ratio of received energy to interference and an actual ratio of received energy to interference as determined by the telecommunications network.
A method of operating a mobile user equipment unit which transmits a connection request message to a telecommunications network, the method characterized by:
A mobile user equipment unit having an on-board unit which makes a calculation of a transmit power for a connection request message to a telecommunications network using a set of differentials, each of the differentials being a difference between a target ratio of received energy to interference and an actual ratio of received energy to interference as determined by the telecommunications network.
Dependencies are inferred from the claim text.