NODE AND METHOD FOR BUFFERING DOWNLINK DATA

摘要

Example embodiments presented herein are directed towards a mobility management node and SGW or Gn/Gp-SGSN, and corresponding methods therein, for downlink data buffering in a wireless communications network. Such buffering is useful when the wireless device is in a power saving state e.g. PSM or eDRX. Thus, since the downlink data is buffered, there is no longer a need for multiple Downlink Data Notifications to be sent.

主权项

1. A method, in a mobility management node, for downlink data buffering in a wireless communications network, the method comprising:
receiving, from a Serving Gateway, SGW, or a Serving General Packet Radio Service Support Node, SGSN, a Downlink Data Notification, DDN, for a downlink data packet for a wireless device in an idle mode; determining if the wireless device is also in a power saving state; and if the wireless device is in a power saving state, sending, to the SGW or the SGSN, a DDN Acknowledge with one or more of a cause code, a flag and a buffer time value indicating that the downlink data packet is to be buffered in memory.