Pre-emption of user data sent in signaling channels

Details Pre-emption of user data sent in signaling channels Pre-emption of user data sent in signaling channels

H - Electricity

04

W

H04W 8/18 (2009.01) H04W 4/20 (2009.01) H04L 29/06 (2006.01) H04L 29/08 (2006.01)

Patent

CA 2446698

In the LAPDm a short message service is implemented by pre-emption of every second signalling message when there is a short message to be sent. Same pre- emption mechanism is also needed when the RLC/MAC protocol is used on the data link layer instead of the LAPDm. The mechanism is provided by defining at least two different identities to be used with frames transmitted on the signalling channel; and pre-empting frames on the MAC at least on the basis of the identity relating to a frame. The identities are preferably identified on the basis of the signalling radio bearer of the frame.

Dans un protocole LAPDm, un service d'envoi de messages courts et mis en oeuvre par préemption d'un message de signalisation sur deux lorsqu'il y a un message court à envoyer. Le même mécanisme de préemption est également nécessaire lorsque le protocole RLC/MAC est utilisé sur la couche de liaison de données à la place du protocole LAPDm. Afin de mettre en oeuvre ce mécanisme, on définit au moins deux identités différentes à utiliser avec les trames transmises sur le canal de signalisation; et on effectue la préemption des trames sur le protocole MAC au moins sur la base de l'identité correspondant à une trame. Ces identités sont, de préférence, identifiées sur la base d'un support radio de signalisation de la trame.

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