Use of packet status report from secondary base station to master base station in wireless network

Patent metadata

Field	Value
Publication number	US-2016183103-A1
Application number	US-201314910572-A
Country	US
Kind code	A1
Filing date	Aug 9, 2013
Priority date	Aug 9, 2013
Publication date	Jun 23, 2016
Grant date	—

Abstract

Various example embodiments are disclosed herein. A technique is provided for detecting, by a secondary base station (BS), a trigger condition in a wireless network, the wireless network including a mobile station (MS) that is connected to both a master base station (master BS) and a secondary base station (secondary BS), and sending a protocol data unit (PDU) status report from the secondary BS to the master BS in response to the secondary BS detecting the trigger condition, the PDU status report identifying one or more PDUs or portions thereof for further transmission to the MS.

First claim

1 . A method comprising:
detecting, by a secondary base station (BS), a trigger condition in a wireless network, the wireless network including a mobile station (MS) that is connected to both a master base station (master BS) and a secondary base station (secondary BS); and sending a protocol data unit (PDU) status report from the secondary BS to the master BS in response to the secondary BS detecting the trigger condition, the PDU status report identifying one or more PDUs or portions thereof for further transmission to the MS.

2 .- 9 . (canceled)

10 . The method of claim 1 wherein the PDU status report comprises a reason code that identifies a reason why the PDU status report is being sent to the master BS, wherein the reason code identifies one of the following reasons:
a radio link failure of a radio link or radio bearer between MS and secondary BS;
PDU status report requested by master BS;
a traffic overload condition at the secondary BS;
detecting that an amount of traffic over a radio link or radio bearer between the MS and the secondary BS is less than a threshold;
a message received from the master BS requesting that the secondary BS cease operating on a radio link or radio bearer between the secondary BS and the MS;
a message received from the master BS requesting that the secondary BS deactivate or deconfigure a radio link or radio bearer between the secondary BS and the MS based on the MS moving via handover to a new secondary BS;
a message received from another BS, that is not the master BS, requesting that the secondary BS cease operating on a radio link or radio bearer between the secondary BS and the MS;
a message received from the MS requesting that the secondary BS cease operating on a radio link or radio bearer between the secondary BS and the MS;
a message received from the master BS indicating that a radio link or radio bearer between the secondary BS and the MS has been deactivated or deconfigured; and
a message received from another BS, that is not the master BS, indicating that a radio link or radio bearer between the secondary BS and the MS has been deactivated or deconfigured based on the MS moving via handover to a new secondary BS.

11 . (canceled)

12 . The method of claim 1 wherein the detecting the trigger condition comprises the secondary BS detecting a failure of a radio link or radio bearer between the secondary BS and the MS.

13 . The method of claim 1 wherein the detecting the trigger condition comprises receiving by the secondary BS from the master BS a message requesting that the secondary BS cease operating on one or more radio links or radio bearer between the secondary BS and the MS.

14 . The method of claim 1 wherein the detecting the trigger condition comprises receiving by the secondary BS a message indicating that a radio link or radio bearer between the secondary BS and the MS has been deactivated or deconfigured.

15 . The method of claim 1 wherein the detecting the trigger condition comprises receiving by the secondary BS a message indicating that a radio link or radio bearer between the secondary BS and the MS has been deactivated or deconfigured based on the MS moving via handover to a new secondary BS.

16 . The method of claim 1 wherein the detecting the trigger condition comprises receiving by the secondary BS a message received from another BS, that is not the master BS, requesting that the secondary BS cease operating on a radio link or radio bearer between the secondary BS and the MS.

17 . The method of claim 1 wherein the detecting the trigger condition comprises receiving by the secondary BS a message received from the MS requesting that the secondary BS cease operating on a radio link or radio bearer between the secondary BS and the MS.

18 . (canceled)

19 . The method of claim 1 wherein the detecting the trigger condition comprises receiving by the secondary BS from the master BS a message requesting that the secondary BS deactivate or deconfigure a radio link or radio bearer between the secondary BS and the MS.

20 . (canceled)

21 . The method of claim 1 wherein the detecting the trigger condition comprises detecting an overload condition where secondary BS has become overloaded with sending or receiving packets.

22 . The method of claim 1 wherein the detecting the trigger condition comprises detecting that an amount of traffic over a radio link between the MS and the secondary BS is less than a threshold.

23 . The method of claim 1 wherein the detecting the trigger condition comprises receiving by the secondary BS a message requesting that the secondary BS deactivate or deconfigure a radio link or radio bearer between the secondary BS and the MS based on the MS moving via handover to a new secondary BS.

24 . The method of claim 1 wherein the detecting the trigger condition comprises receiving by the secondary BS from the master BS a message requesting that the secondary BS deactivate or deconfigure a radio link or radio bearer between the secondary BS and the MS based on no further data to be transmitted to the MS.

25 . The method of claim 1 wherein the PDU status report identifying one or more PDUs or portions thereof for further transmission to the MS causes the master BS to transmit or cause another secondary BS to transmit at least some of the PDUs or portions thereof identified for further transmission to the MS.

26 . An apparatus comprising at least one processor and at least one memory including computer instructions, when executed by the at least one processor, cause the apparatus to:
detect, by a secondary base station (BS), a trigger condition in a wireless network, the wireless network including a mobile station (MS) that is connected to both a master base station (master BS) and a secondary base station (secondary BS); and send a protocol data unit (PDU) status report from the secondary BS to the master BS in response to the secondary BS detecting the trigger condition, the PDU status report identifying one or more PDUs or portions thereof for further transmission to the MS.

27 . The apparatus of claim 26 wherein the instructions causing the apparatus to detect the trigger condition comprises instructions causing the apparatus to receive by the secondary BS from the master BS a message requesting that the secondary BS cease operating on one or more radio links or radio bearer between the secondary BS and the MS.

28 . The apparatus of claim 26 wherein the instructions causing the apparatus to detect the trigger condition comprises instructions causing the apparatus to receive by the secondary BS a message indicating that a radio link or radio bearer between the secondary BS and the MS has been deactivated or deconfigured.

29 . The apparatus of claim 26 wherein the instructions causing the apparatus to detect the trigger condition comprises instructions causing the apparatus to receive by the secondary BS a message received from another BS, that is not the master BS, requesting that the secondary BS cease operating on a radio link or radio bearer between the secondary BS and the MS.

30 .- 32 . (canceled)

33 . The apparatus of claim 26 wherein the PDU status report comprises a reason code that identifies a reason why the PDU status report is being sent to the master BS, wherein the reason code identifies at least one of the following reasons:
a radio link failure of a radio link or radio bearer between MS and secondary BS;

Assignees

• Nokia Solutions & Networks Oy

Inventors

• Saily Mikko
• Koskinen Henri Markus
• Rosa Claudio

Classifications

• H04W28/0205

  at the air interface (dynamic wireless traffic scheduling H04W72/12) · CPC title

• H04L47/34

  ensuring sequence integrity, e.g. using sequence numbers · CPC title

• H04W76/15

  Setup of multiple wireless link connections · CPC title

• H04L1/1671

  the supervisory signal being transmitted together with control information · CPC title

• H04L1/1877

  for semi-reliable protocols, e.g. for less sensitive applications like streaming video (buffer level management for video bitstream control arrangements H04N21/44004) · CPC title