Short message transmission and handover procedures
First Claim
1. A method for transmitting downlink small data packets to a user equipment subscribed to a mobile communication network comprising a base station, the method comprising the steps of:
- triggering the user equipment by a connectivity-related network entity to establish connectivity with the mobile communication network via the control plane only and not via user plane,establishing by the user equipment and the connectivity-related network entity control plane connectivity for the user equipment, in response to the triggering,transmitting the downlink small data packets to the user equipment using the established control plane connectivity, not using user plane connectivity,starting by the user equipment a control-plane establishment timer when initiating the establishing of the control plane connectivity, in response to the triggering, andstopping the control-plane establishment timer, upon establishing the control plane connectivity with the mobile communication network.
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Accused Products
Abstract
The present invention relates to an improved method for handover of a mobile node from E-UTRAN to UTRAN in a scenario where SMS is the only service of the mobile node. The improved handover method allows saving radio resources by establishing the signalling connection for SMS exchange in the target network, and avoiding the data connection in the target network, since it is not used. The MME takes the decision to establish or not the data connection in the target UTRAN, and accordingly instructs the SGSN and UE to set the corresponding PDP contexts for the data connection to a “preserved” state, so as to avoid the establishment of same. Embodiments further relate to improved SMS delivery for IDLE mode UEs that activate ISR so as to avoid the involvement of the MSC server. Instead, packet-switched domain nodes are to be involved only.
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Citations
18 Claims
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1. A method for transmitting downlink small data packets to a user equipment subscribed to a mobile communication network comprising a base station, the method comprising the steps of:
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triggering the user equipment by a connectivity-related network entity to establish connectivity with the mobile communication network via the control plane only and not via user plane, establishing by the user equipment and the connectivity-related network entity control plane connectivity for the user equipment, in response to the triggering, transmitting the downlink small data packets to the user equipment using the established control plane connectivity, not using user plane connectivity, starting by the user equipment a control-plane establishment timer when initiating the establishing of the control plane connectivity, in response to the triggering, and stopping the control-plane establishment timer, upon establishing the control plane connectivity with the mobile communication network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A user equipment for receiving downlink small data packets, the user equipment being subscribed to a mobile communication network comprising a base station, the user equipment comprising:
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a receiver configured to receive a trigger message from a connectivity-related network entity to establish connectivity with the mobile communication network via the control plane only and not via user plane, a processor, a transmitter and the receiver configured to establish control plane connectivity with the connectivity-related network entity, in response to the trigger message, the receiver is further configured to receive the downlink small data packets using the established control plane connectivity not using user plane connectivity, wherein the processor is further configured to start a control-plane establishment timer when initiating the establishing of the control plane connectivity, and to stop the control-plane establishment timer, upon establishing control plane connectivity with the mobile communication network. - View Dependent Claims (13, 14, 15, 16)
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17. A connectivity-related network entity for transmitting downlink small data packets to a user equipment subscribed to a mobile communication network comprising a base station, the connectivity-related network entity comprising:
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a transmitter configured to transmit a trigger message to the user equipment to establish connectivity with the mobile communication network via control plane only and not via user plane, a processor, receiver and the transmitter configured to establish control plane connectivity for the user equipment, the transmitter configured to transmit the downlink small data packets to the user equipment using the established control plane connectivity, not using user plane connectivity, wherein the processor is further configured to start a control-plane establishment timer when initiating the establishing of the control plane connectivity, and to stop the control-plane establishment timer, upon establishing control plane connectivity with the mobile communication network. - View Dependent Claims (18)
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Specification