Node and method for buffering downlink data
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsHans RÖNNEKE, Peter HEDMAN
Life of this patent
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Abstract
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.
Claims29
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.
A mobility management node for downlink data buffering in a wireless communications network, the mobility management node comprising:
- a receiver configured to receive, 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;
- a processing circuitry configured to determine if the wireless device is also in a power saving mode;
- and
- if the wireless device is in a power saving mode, a transmitter is configured to send, to the SGW or the SGSN, a DDN Acknowledge with one or more of a cause code and a buffer time value indicating that the downlink data packet is to be buffered in memory.
A method, in a Serving Gateway, SGW, or a Gn/Gp-Serving General Packet Radio Service Support Node, Gn/Gp-SGSN, for downlink data buffering in a wireless communications network, the method comprising:
- sending, to a mobility management node, a Downlink Data Notification, DDN, for a downlink data packet for a wireless device in an idle mode;
- receiving, from the mobility management node, a DDN Acknowledgement comprising one or more of a flag, a cause code and a buffer time value indicating the downlink data packet is to be buffered in memory;
- and
- buffering the downlink data packet within the SGW or Gn/Gp-SGSN until a connection with the wireless device has been established for the downlink data packet to be delivered to the wireless device or until a time indicated by the buffer time value has expired.
A Serving Gateway, SGW, or a Gn/Gp-Serving General Packet Radio Service Support Node, Gn/Gp-SGSN, for downlink data buffering in a wireless communications network, the SGW or Gn/Gp-SGSN comprising:
- a transmitter configured to send, to a mobility management node, a Downlink Data Notification, DDN, for a downlink data packet for a wireless device in an idle mode;
- a receiver configured to receive, from the mobility management node, a DDN Acknowledgement comprising one or more of a flag, a cause code and a buffer time value indicating the downlink data packet is to be buffered in memory;
- and
- processing circuitry configured to buffer the downlink data packet within the SGW or Gn/Gp-SGSN until the connection with the wireless device has been established for the downlink data packet to be delivered to the wireless device or until a time indicated by the buffer time value has expired.
Dependencies are inferred from the claim text.