The present document studies the core network and NAS impacts in UE of extending DRX cycle for both idle mode and connected mode, solutions in the core network to support it, and interactions between GERAN/RAN and Core Network. Also, basic assumptions may be done for each solution on GERAN/RAN aspects of extending DRX cycle.
The main goal is to identify which open issues remained from the Rel 12 study for extended Idle and Connected mode DRX as described in TR 23.887
(as documented in clause 22.214.171.124 and 126.96.36.199 of TR 23.887
), document potential solutions and conclude on which feasible solutions would be adopted in core network (pending work in RAN regarding extension of DRX cycle).
No connected mode mobility enhancements for extended C-DRX are considered in this work, i.e., if a UE using extended C-DRX moves to a different cell, current connected mode mobility procedures apply.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
: "Vocabulary for 3GPP Specifications".
: "Service aspects; Service principles ".
: "Functional stage 2 description of Location Services (LCS)".
: "Study on Machine-Type Communications (MTC) and other mobile data applications communications enhancements)".
: "Study on Optimizations to Support High Latency Communications".
: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".
: "Mobile radio interface Layer 3 specification; Core network protocols; Stage 3".
: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3".
: "Mobile radio interface layer 3 specification; Radio Resource Control (RRC) protocol".