Handling of downlink IP packet transmission switching on dual USIM UE

Abstract

A process for handling downlink transmission to a User Equipment (UE) (10) from a Service Provider (3), said UE (10) being adapted to be associated with at least two Subscriber Identities Modules (SIM) respectively associated with a first and a second communication Network (1, 2), said process involving the steps of: - establishing (21) a first connection between said UE (10) and said first communication network (1); and - requesting (22) a second connection between said UE (10) and said second communication network (2) by issuing a specific command associated with a specific value or parameter representative of a request of switching between said first and second communication network the downlink transmission from said Service provider (3); - issuing (23) from said second communication network a specific request to said Service Provider (3) for establishing a new connection between said second communication network and the Service Provider and informing the service provider that a switching of network is requested by the UE; - transmitting (24) an acknowledgment from said Service Provider (3) to said second communication network (2) confirming the establishment of the connection between the second communication network and the SP (3) without starting data transfer through said second communication network (2); - transmitting (25) from the second communication network to the User Equipment (10) an acknowledgment related to said second communication network (2) and said Service Provider (3); - issuing (26) by said UE a request to said SP (3) to data communication, e.g. through said first communication network and the request being associated with a sequence number of a first packet to be communicated through said second communication network (2); - performing (27) data storage for said SP and said UE; - transmitting (28, 29) downlink data communication through said second communication network; - transmitting NACK / ACK messages (30, 31) to said SP through said second communication network; - transmitting (32) to said first communication network a request to release the connection issued by the Service Provider; - transmitting (33) a connection release between the UE and the first communication network.

Description

technical field [0001] The present invention relates to the field of wireless communications, and in particular to a method for handling downlink transmissions from a service provider to a user equipment (UE). The UE is adapted to be associated with at least two subscriber identities (eg at least two Subscriber Identity Modules (SIMs)) respectively associated with the first communication network and the second communication network. Background technique [0002] Given the higher communication speeds, new services and the large number of wireless communication networks becoming available in a given field (for example, Global System for Mobile Communications (GSM) networks, General Packet Radio Service (GPRS) networks, high-speed For consumers of Downlink Packet Access (HSDPA) networks and Long Term Evolution (LTE) networks), the advent of mobile telephony and the development of wireless communications have opened up new possibilities and new perspectives. [0003] To take ad...

AI Technical Summary

Problems solved by technology

[0008] Contrary to the uplink, since the party (user equipment) that initiates the handover process does not transmit data but receives data from the base station, it is necessary to extend the use of two existing SIM cards to other scenarios, especially causing Additional Questions Downlink

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