Method for processing ndi in random access procedure and a...

Details Method for processing ndi in random access procedure and a... Method for processing ndi in random access procedure and a...

H - Electricity

04

B

H04B 7/26 (2006.01) H04W 74/08 (2009.01)

Patent

CA 2722058

A method for processing NDI in a random access procedure and a method for transmitting and receiving a signal using the same are disclosed. The method for transmitting an uplink signal from a user equipment (UE) to a base station comprises receiving a first uplink (UL) grant signal through a message identified by a temporary cell identifier (Temporary C-RNTI) from a base station, the first uplink grant signal including a new data indicator (NDI) toggled if the base station indicates new transmission; receiving a second uplink grant signal through a downlink control channel identified by a cell identifier (C-RNTI) from the base station, the second uplink grant signal including a new data indicator (NDI) with a predetermined value; and determining uplink signal retransmission of the user equipment depending on whether the NDI of the second uplink grant signal has been toggled, wherein the UE ignores the NDI received using the temporary cell identifier.

L'invention concerne un procédé de traitement de NDI dans une procédure daccès aléatoire et un procédé démission et de réception dun signal à laide de celui-ci. Le procédé démission dun signal montant dun équipement dutilisateur (UE) à une station de base comporte les étapes consistant à recevoir dune station de base un premier signal dattribution de voie montante (UL) via un message identifié par un identifiant temporaire de cellule (C-RNTI temporaire), le premier signal dattribution de voie montante comprenant un indicateur de nouvelles données (NDI) qui change de valeur si la station de base indique une nouvelle émission; à recevoir de la station de base un deuxième signal dattribution de voie montante via un canal de commande en voie descendante identifié par un identifiant de cellule (C-RNTI), le deuxième signal dattribution de voie montante comprenant un indicateur de nouvelles données (NDI) de valeur prédéterminée; et à déterminer la réémission du signal montant de léquipement dutilisateur selon que le NDI du deuxième signal dattribution de voie montante a changé de valeur ou non, lUE ignorant le NDI reçu à laide de lidentifiant temporaire de cellule.

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