WO2014181155A1 - Cell update events during connection reconfigurations - Google Patents

Cell update events during connection reconfigurations Download PDF

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Publication number
WO2014181155A1
WO2014181155A1 PCT/IB2013/053800 IB2013053800W WO2014181155A1 WO 2014181155 A1 WO2014181155 A1 WO 2014181155A1 IB 2013053800 W IB2013053800 W IB 2013053800W WO 2014181155 A1 WO2014181155 A1 WO 2014181155A1
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WO
WIPO (PCT)
Prior art keywords
access network
radio device
configuration
radio
radio access
Prior art date
Application number
PCT/IB2013/053800
Other languages
French (fr)
Inventor
Bindhya Vashini Tiwari
Alexander Sayenko
Sheyam Lal Dhomeja
Original Assignee
Nokia Siemens Networks Oy
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Publication date
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Priority to PCT/IB2013/053800 priority Critical patent/WO2014181155A1/en
Publication of WO2014181155A1 publication Critical patent/WO2014181155A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities

Definitions

  • Events that trigger cell update procedures may occur at a radio device whilst the radio device is processing a reconfiguration message from the radio access network with which it has an on-going connection.
  • a method comprising: detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and following a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a ceil update procedure; and wherein said predetermined rule is also stored at said radio access network.
  • a method comprising: controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detecting in a transmission by said radio device a eel!
  • said predetermined configuration is said first configuration.
  • a method comprising: detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; selecting at said radio device one of said first and second configurations for said connection; and controlling said radio device to transmit a cell update message including an indication for the radio access network of the selected configuration,
  • said method composes selecting said first configuration for said connection when detecting a ceil update event prior to transmitting a response message to said reconfiguration message.
  • a method comprising: controiiing a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detecting in a transmission by said radio device a cell update message, which cell update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and proceeding further with the connection according to the configuration seiected by the radio device.
  • a method comprising; detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detecting a cell update event before completing processing of said reconfiguration message at said radio device; controiiing said radio device to transmit a cell update message after detecting said cell update event; thereafter detecting in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and adopting at the radio device the configuration selected by the radio access network.
  • a method comprising: controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detecting at said radio access network in a transmission by said radio device a ceil update message indicating uncompleted processing of the reconfiguration message at the radio device; selecting at said radio access network a configuration for the connection; and controlling a transmitter of the radio access network to transmit a cell update confirm message including an indication of the configuration seiected by the radio access network for the connection.
  • an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: detect at a radio device In a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and follow a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network.
  • an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowiedgment for a response message to the reconfiguration message; and proceed further with the connection at least partly on the basis of information stored at the radio access network about a predetermined rule followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
  • said predetermined configuration is said first configuration.
  • an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; select at said radio device one of said first and second configurations for said connection; and control said radio device to transmit a cell update message including an Indication for the radio access network of the selected configuration.
  • the memory and computer program code are further configured to, with the processor, cause the apparatus to: select said first configuration for said connection when detecting a ceil update event prior to transmitting a response message to said reconfiguration message.
  • an apparatus comprising; a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message, which eel! update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and proceed further with the connection according to the configuration selected by the radio device.
  • an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event before completing processing of said reconfiguration message at said radio device; control said radio device to transmit a cell update message after detecting said cell update event; thereafter detect in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and adopt at the radio device the configuration selected by the radio access network.
  • an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect at said radio access network in a transmission by said radio device a cell update message indicating uncompleted processing of the reconfiguration message at the radio device; select at said radio access network a configuration for the connection; and control a transmitter of the radio access network to transmit a cell update confirm message including an indication of the configuration selected by the radio access network for the connection.
  • said cell update event is a radio link failure or an unrecoverable transmission error.
  • an apparatus comprising: means for detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; means for detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and means for following a predetermined ruie to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said eel! update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network.
  • an apparatus comprising: means for controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; means for thereafter detecting in a transmission by said radio device a cell update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowledgment for a response message to the reconfiguration message; and means for proceeding further with the connection at ieast partly on the basis of information stored at the radio access network about a predetermined ruie followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
  • an apparatus comprising: means for defecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; means for detecting a eel! update event at said radio device before completing processing of said reconfiguration message at said radio device; means for selecting at said radio device one of said first and second configurations for said connection; and means for controlling said radio device to transmit a cell update message including an indication for the radio access network of the seiected configuration.
  • an apparatus comprising: means for controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; means for thereafter detecting in a transmission by said radio device a celi update message, which ceil update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and means for proceeding further with the connection according to the configuration selected by the radio device.
  • an apparatus comprising: means for detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; means for detecting a ceil update event before comp!eting processing of said reconfiguration message at said radio device; means for controlling said radio device to transmit a ceil update message after detecting said cell update event; thereafter detecting in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and means for adopting at the radio device the configuration selected by the radio access network.
  • an apparatus comprising: means for controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; means for thereafter detecting at said radio access network in a transmission by said radio device a ceil update message indicating uncompleted processing of the reconfiguration message at the radio device; means for selecting at said radio access network a configuration for the connection; and means for controlling a transmitter of the radio access network to transmit a cell update confirm message including an indication of the configuration selected by the radio access network for the connection.
  • a computer program product comprising program code means which when loaded into a computer controls the computer to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and follow a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network.
  • a computer program product comprising program code means which when loaded into a computer controls the computer to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a ceil update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowledgment for a response message to the reconfiguration message; and proceed further with the connection at least partly on the basis of Information stored at the radio access network about a predetermined rule followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
  • a computer program product comprising program code means which when loaded into a computer controls the computer to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; select at said radio device one of said first and second configurations for said connection; and control said radio device to transmit a cell update message including an indication for the radio access network of the selected configuration.
  • a computer program product comprising program code means which when loaded into a computer controls the computer to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message, which cell update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and proceed further with the connection according to the configuration selected by the radio device.
  • a computer program product comprising program code means which when loaded into a computer controls the computer to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event before completing processing of said reconfiguration message at said radio device; control said radio device to transmit a cell update message after detecting said cell update event; thereafter detect in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and adopt at the radio device the configuration selected by the radio access network,
  • a computer program product comprising program code means which when loaded into a computer controls the computer to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect at said radio access network in a transmission by said radio device a cell update message indicating un
  • Figure 1 illustrates an example of a radio access network in which embodiments of the present invention can be implemented
  • Figure 2 illustrates an example of apparatus for use at a user equipment (UE) in Figure 1 ;
  • UE user equipment
  • Figures 3a and 3b illustrate examples of apparatus for use at an access node in Figure 1;
  • Figure 4 illustrates an example of apparatus for use at a radio network controller of Figure 1 ;
  • Figure 5 illustrates an example of operations at UE and RNC in accordance with a first embodiment of the present invention
  • Figure 6 illustrates an example of operations at UE and RNC in accordance with a second embodiment of the present invention.
  • Figure 7 illustrates an example of operations at UE and RNC in accordance with a third embodiment of the present invention.
  • Embodiments of the present invention are described in detail below for the example of a UMTS Terrestial Radio Access Network (UTRAN). However, the same kind of techniques are also applicable to other types of radio access networks.
  • UTRAN UMTS Terrestial Radio Access Network
  • Figure 1 illustrates a UMTS Terrestial Radio Access Network.
  • the UTRAN comprises a collection of access nodes 2 respectively operating at least one cell.
  • access nodes 2 respectively operating at least one cell.
  • Only a single UE 8 is shown in Figure 1 , but a large number of UEs would typically be within the coverage area of an access node at any one time.
  • the access nodes 2 are base stations (NodeBs) of a UTRAN, typically comprising thousands of such base stations each operating one or more cells.
  • the coverage area of each cell depends on the transmission power and the directionality of the antenna by which the cell is operated.
  • the access nodes may be a combination of network entities such as a remote radio head and server or host.
  • a radio network controller RNC 8 controls the operation of the NBs 2. Only one RNC 8 is shown in Figure 1 , but a UTRAN would typically comprise a large number of RNCs 8 each controlling a respective group of NBs. The RNCs 8 are all connected to a core network (CN) 10.
  • CN core network
  • FIG 2 shows a schematic view of an example of user equipment or user device (UE) 6 that may be used for communicating with the NBs 2 of Figure 1 via a wireless interface.
  • the UE 6 may be any device capable of at least sending or receiving radio signals to or from the NBs 2 of Figure 1.
  • UE 8 may, for example, be a device designed for tasks involving human interaction such as making and receiving phone calls between users, and streaming multimedia or providing other digital content to a user.
  • Non-limiting examples include a smart phone, and a laptop computer/notebook computer/tablet computer/ e-reader device provided with a wireless interface facility.
  • the UE 8 may communicate via radio transceiver circuitry, unit or module 206 and associated antenna arrangement 205 comprising at least one antenna or antenna unit.
  • the antenna arrangement 205 may be arranged internally or externally to the UE 2.
  • the UE 6 may be provided with: a baseband unit comprising one or more baseband processors 203; and at least one memory or data storage entity 217,
  • the baseband processor 203 and one or more memory entities 217 may be provided on an appropriate circuit board and/or in chipsets,
  • the memory or data storage entity 217 is typically internal but may also be external or a combination thereof, such as in the case when additional memory capacity is obtained from a service provider.
  • the user may control the operation of the UE 6 by means of a suitable user Interface such as key pad 201 , voice commands, touch sensitive screen or pad, combinations thereof or the like.
  • a display 215, a speaker and a microphone may also be provided.
  • the UE 6 may comprise appropriate connectors (either wired or wireless) to other devices and/or for connecting external accessories, for example hands-free equipment, thereto.
  • Figure 3a shows one example of apparatus for use at the NBs 2 of Figure 1.
  • the apparatus comprises or is coupled to a radio frequency antenna array 301 (comprising at least one antenna or antenna unit) configured to receive and transmit radio frequency signals; radio transceiver circuitry, module or unit 303 configured to interface the radio frequency signals received and transmitted by the antenna array 301 ; and a baseband unit comprising one or more baseband processors 306.
  • the apparatus usually comprises an interface 309 via which, for example, the baseband processor 306 can communicate with other network elements such as the core network (not shown).
  • the baseband processor 308 is configured to process signals from the radio transceiver 303.
  • the radio transceiver 303 may also control the radio transceiver 303 to generate suitable RF signals to communicate Information to UEs or other eNBs via a wireless communications link, and also to exchange information with other network nodes such as RNC 8 across a wired link via the interface 309,
  • the one or more memory or data storage units 307 are used for storing data, parameters andior instructions for use by the baseband processor 306.
  • the memory or data storage entity may be internal or external (locating in another network entity) or a combination thereof.
  • Figure 3b illustrates another example of apparatus for use at the NBs of Figure 1.
  • the apparatus is the same as that of Figure 3a except that the baseband unit comprising the baseband processor 306 is located remotely from the radio transceiver 303 and the antenna array 301 , and is connected to the radio transceiver 303 by e.g. a fibre optic link 311.
  • FIG. 4 shows an example of apparatus for use at the RNC 8.
  • the apparatus 400 includes one or more memories 407 for storing program code, and one or more data processors 406 for controlling the actions described below in accordance with program code stored at the one or more memories 407.
  • the apparatus also comprises an interface 407 via which it can send and receive information to and from other network nodes, such as NBs 2 and a core network (CN) 10.
  • NBs 2 network nodes
  • CN core network
  • the memories 217, 307, 407 may be implemented using an suitable data storage technology, such as, for example, semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory,
  • the data processors 203, 308, 408 may, for example, include one or more of microprocessors, digital signal processors (DSPs) and processors based on a multi-core processor architecture.
  • DSPs digital signal processors
  • references below to processors 203, 306, 408 controlling the operation of other elements of UE and NBs refer to the baseband processors operating in accordance with program code stored at memories 217, 307, 407,
  • Embodiments of the invention are described below for the example of a UE 6 and radio access network operating in accordance with 3GPP TS 25.331, in which a ceil update event triggers a cell update procedure including the transmission of a RRC CELL UPDATE message by the UE 6.
  • the CELL UPDATE message includes an information element (IE) named "Reconfiguration Status Indicator" (RSI) if either (a) the UE 8 happens to have received a RRC reconfiguration message e.g.
  • the UE 8 happens to have transmitted a response message to a received reconfiguration message but has not already received the RLC acknowledgment for the response message.
  • the RSI IE is not included In the CELL UPDATE message if the UE 6 either (c) has not received a reconfiguration message sent by the radio access network, or (d) the reconfiguration process is already completed by the receipt of a RLC acknowledgment for a response message to a reconfiguration message.
  • the RSI IE Ss not included in the CELL UPDATE message for both cases (c) and (d), but the radio access network can determine which of these two cases (c) and (d) applies to UE from whether or not the radio access network has received a response to the reconfiguration message.
  • Examples of cell update events are the detection at UE of a radio link failure or an RLC unrecoverable error.
  • Radio Resource Control timer T313
  • RRC Radio Resource Control
  • timer T313 The occurrence of a radio link failure at UE 8 in CELLJ3GH state is determined as the expiry of a Radio Resource Control (RRC) timer (timer T313) which is started in response to receiving a predetermined number of consecutive "out of sync" indications from layer 1 for an established physical channel, and continues to run unless a predetermined number of successive "in sync" indications are received from layer 1.
  • RRC Radio Resource Control
  • a possible scenario in which a RLC unrecoverable error is considered to have occurred is when RLC acknowledge mode is used for transmissions of transport blocks, and an error in the transmission of a transport block cannot be recovered even after the maximum permitted number of retransmissions of the transport block have been done and the subsequent RLC RESET procedure has also failed.
  • the processor 208 at UE follows a predetermined rule to select a predetermined one of the old and new configurations (STEP 508 of Figure 5).
  • the predetermined rule may be that UE 6 seiects the old configuration (i.e. the configuration without the change indicated in the reconfiguration message received from RNC 8).
  • the predetermined rule is also stored at RNC 8, and when the processor 406 at RNC receives the CELL UPDATE message via the NB 2 operating the serving cell and via interface 409 (STEP 508 of Figure 5), and detects the inclusion of the RSI IE in the CELL UPDATE message, the processor 408 at RNC 8 can be certain about which configuration has been selected by UE 6; and the processor 406 at RNC 8 proceeds with the connection to UE 6 according to the configuration decided by the predetermined ru!e (STEP 510 of Figure 5).
  • the processor 208 at UE 6 may, when first attaching to the UTRAN, control the transceiver 208 at UE 6 to make a transmission including an indication for RNC 8 that UE 6 follows the predetermined rule described above.
  • Such indication could take the form of a new capability bit in the UE Radio Access Capability Information that a UE transmits to UTRAN when first attaching to UTRAN.
  • the processor 203 at UE 8 whenever the processor 203 at UE 8 detects a cell update event has occurred during the processing of a reconfiguration message (STEP 802 of Figure 8), and the processor 203 at UE 6 determines that it is to include the RSI IE in the CELL UPDATE message in accordance with the extent of processing of the reconfiguration message (STEP 806 of Figure 8), the processor 203 al UE 8 first selects either the old or new configuration (STEP 604 of Figure 6), and additionally controls transceiver 208 to make a transmission including an indication for RNC 8 about which of the two configurations has been setected by UE 6 (STEP 808 of Figure 6). Such indication could take the form of an additional information element in the CELL UPDATE message.
  • the additional information element could be named "SELECTED NEW CONFIGURATION" and is included in the CELL UPDATE message only if the RSI IE Is included in the CELL UPDATE message and UE 8 has selected the new configuration.
  • the RNC 8 receives the CELL UPDATE message via the NB 2 operating the serving cell and via interface 409. If the processor 406 at RNC 8 detects that both the RSI IE and the "SELECTED NEW CONFIGURATION" IE are included in the received CELL UPDATE message, then the processor 408 at RNC 8 proceeds with the connection to UE 6 according to the new configuration (i.e. including the change identified in the reconfiguration message sent earlier by RNC 8 to the UE 6).
  • the processor 408 at RNC 8 detects that the RSI IE is included ire the received CELL UPDATE message but is not accompanied by the "SELECTED NEW CONFIGURATION" IE, the processor 406 at RNC 8 proceeds with the connection according to the old configuration (i.e. without the change identified in the reconfiguration message sent earlier by the RNC to the UE) (STEP 810 of Figure 6).
  • the additional IE could be named "SELECTED CONFIGURATION", and set to "NEW” or OLD” according to the configuration that the processor 203 at UE 8 has selected.
  • the addition is accompanied by an indication that "RSI" in the "Need” column means that this IE is mandatory if (i) the IE “Reconfiguration Status Indicator” is Included (I.e. set to "TRUE") and (ii) the UE has selected the new configuration; but that this IE is not needed otherwise.
  • the addition is accompanied by an indication that "RSI” in the "Need” column means that this IE is mandatory if the IE “Reconfigu ration Status Indicator” is Included (i.e. set to "TRUE"), but that this IE is not needed otherwise.
  • the processor 203 at UE 6 may, when first attaching to the UTRAN, control the transceiver 208 at UE 6 to make a transmission including an indication for RNC 8 that UE 6 uses the new SE described above.
  • Such indication could take the form of a new capability bit in the UE Radio Access Capability Information that a UE transmits to UTRAN when first attaching to UTRAN,
  • the processor 406 at RNC 8 decides what configuration to use for a connection with UE 8 in the event that RNC 8 receives a CELL UPDATE message from UE 6 including the RSI IE; the processor 406 at RNC sends out a message for UE 6 indicating the configuration decided by RNC 8; and the processor 203 at UE 6 follows the RNG's decision.
  • FIG. 7 One example of the operations at RNC 8 and UE 8 is illustrated in Figure 7,
  • the processor 203 of UE 8 In response to the detection at the processor 203 of UE 6 of a cell update event during an early stage of processing a reconfiguration message received from RNC 8 (STEP 702 of Figure 7), the processor 203 of UE 8 controis the transceiver 208 of UE 8 to transmit a cell update message Including the RSI IE (STEP 704 of Figure 7).
  • the processor 406 at RNC 8 receives the CELL UPDATE message via the NB 2 operating the cell serving UE 8 and via interface 409; and detects the inclusion of the RSI IE in the CELL UPDATE message (STEP 708 of Figure 7).
  • the processor 408 at RNC 8 decides what configuration to use for the continuation of the connection with UE 8 (STEP 708 of Figure 7).
  • the processor 406 at RNC 8 sends out a CELL UPDATE CONFIRM message for UE 6 including a new Information element indicating the configuration selected by RNC (STEP 710 of Figure 7),
  • the selected configuration could be the old configuration (i.e. without the configuration change Indicated in the reconfiguration message sent earlier by the RNC), or the new configuration (I.e. including the configuration change indicated in the reconfiguration message sent earlier by the RNC), or a third configuration that differs in some aspect to both the old and new configurations.
  • the processor 203 at UE 8 controls the transceiver at UE 6 to receive the CELL UPDATE CONFIRM message via NB 2, and the processor 203 at UE 8 proceeds with the connection according to the configuration indicated in the CELL UPDATE CONFIRM message (STEP 712 of Figure 7). If the configuration indicated in the CELL UPDATE CONFIRM message is different to the one currently adopted by UE 6, the processor 203 at UE 6 aborts the configuration if currently adopts and switches to the configuration indicated in the CELL UPDATE CONFIRM message.
  • the processor 406 at RNC 8 may include in the CELL UPDATE CONFIRM message complete details of the configuration that the UE 6 should adopt after completion of the cell update procedure, in response to detecting such instruction in the CELL UPDATE CONFIRM message, the processor 203 at UE 6 aborts the previous reconfiguration procedure, and restarts a reconfiguration process to the new configuration indicated in the CELL UPDATE CONFIRM message. For example, if the third configuration indicated in the CELL UPDATE CONFIRM message happens to include one or more changes ⁇ such as e.g.
  • the processor 203 at UE 8 restarts the process of making these one or more changes to the old configuration (Le, the configuration without the changes indicated in the reconfiguration message received in STEP 702).
  • the techniques described above can all help to avoid an undesirable situation in which the UTRAM makes incorrect assumptions about the configuration of the connection with the UE at the end of the cell update process, resulting in failure to recover a call for which the connection was being used, and a waste of resources (e.g. transport channei and/or radio bearer) until the UE 8 enters the idle mode.
  • the techniques can thus improve the call re-establishment success rate if and when a cell update event occurs during an on-going reconfiguration procedure.
  • Program code may include software routines, applets and macros.
  • Program code may, for example, be copied into the one or more memories 203, 307 from any apparatus-readable non-transitory data storage medium,
  • Computer program codes may be coded by a programming language, which may be a high-level programming language, such as objective-C, C t C++, C#, Java, etc., or a low-level programming language, such as a machine language, or an assembler.
  • ASICs application specific integrated circuits
  • the design of integrated circuits is by and large a highly automated process. Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate. Programs, such as those provided by Synopsys, Inc. of Mountain View, California and Cadence Design, of San Jose, California automatically route conductors and locate components on a semiconductor chip using well established rules of design as well as libraries of pre stored design modules. Once the design for a semiconductor circuit has been completed, the resultant design, in a standardized electronic format (e.g., Opus, GDSII, or the like) may be transmitted to a semiconductor fabrication facility or "fab" for fabrication,
  • a standardized electronic format e.g., Opus, GDSII, or the like

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Abstract

A technique, comprising: detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and following a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network.

Description

CELL UPDATE EVENTS DURING CONNECTION RECONFIGURATIONS
Events that trigger cell update procedures may occur at a radio device whilst the radio device is processing a reconfiguration message from the radio access network with which it has an on-going connection.
There has been identified the problem of coordinating the adoption of the same configuration at the radio device and the radio access network in the event that the extent of uncompleted processing of the reconfiguration message at the radio device is unknown to the radio access network.
There is hereby provided a method, comprising: detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and following a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a ceil update procedure; and wherein said predetermined rule is also stored at said radio access network. There is also hereby provided a method, comprising: controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detecting in a transmission by said radio device a eel! update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio iink control acknowledgment for a response message to the reconfiguration message; and proceeding further with the connection at least partly on the basis of information stored at the radio access network about a predetermined rule followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
According to one embodiment, said predetermined configuration is said first configuration.
There is also hereby provided a method, comprising: detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; selecting at said radio device one of said first and second configurations for said connection; and controlling said radio device to transmit a cell update message including an indication for the radio access network of the selected configuration, According to one embodiment, said method composes selecting said first configuration for said connection when detecting a ceil update event prior to transmitting a response message to said reconfiguration message.
There is also hereby provided a method, comprising: controiiing a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detecting in a transmission by said radio device a cell update message, which cell update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and proceeding further with the connection according to the configuration seiected by the radio device.
There is also hereby provided a method, comprising; detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detecting a cell update event before completing processing of said reconfiguration message at said radio device; controiiing said radio device to transmit a cell update message after detecting said cell update event; thereafter detecting in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and adopting at the radio device the configuration selected by the radio access network.
There is also hereby provided a method, comprising: controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detecting at said radio access network in a transmission by said radio device a ceil update message indicating uncompleted processing of the reconfiguration message at the radio device; selecting at said radio access network a configuration for the connection; and controlling a transmitter of the radio access network to transmit a cell update confirm message including an indication of the configuration seiected by the radio access network for the connection.
There is also hereby provided an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: detect at a radio device In a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and follow a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network.
There is also hereby provided an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowiedgment for a response message to the reconfiguration message; and proceed further with the connection at least partly on the basis of information stored at the radio access network about a predetermined rule followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
According to one embodiment, said predetermined configuration is said first configuration.
There is also hereby provided an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; select at said radio device one of said first and second configurations for said connection; and control said radio device to transmit a cell update message including an Indication for the radio access network of the selected configuration.
According to one embodiment, the memory and computer program code are further configured to, with the processor, cause the apparatus to: select said first configuration for said connection when detecting a ceil update event prior to transmitting a response message to said reconfiguration message.
There is also hereby provided an apparatus comprising; a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message, which eel! update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and proceed further with the connection according to the configuration selected by the radio device.
There is also hereby provided an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event before completing processing of said reconfiguration message at said radio device; control said radio device to transmit a cell update message after detecting said cell update event; thereafter detect in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and adopt at the radio device the configuration selected by the radio access network.
There is also hereby provided an apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect at said radio access network in a transmission by said radio device a cell update message indicating uncompleted processing of the reconfiguration message at the radio device; select at said radio access network a configuration for the connection; and control a transmitter of the radio access network to transmit a cell update confirm message including an indication of the configuration selected by the radio access network for the connection.
According to one embodiment, said cell update event is a radio link failure or an unrecoverable transmission error.
There is also hereby provided an apparatus comprising: means for detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; means for detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and means for following a predetermined ruie to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said eel! update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network.
There is also hereby provided an apparatus comprising: means for controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; means for thereafter detecting in a transmission by said radio device a cell update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowledgment for a response message to the reconfiguration message; and means for proceeding further with the connection at ieast partly on the basis of information stored at the radio access network about a predetermined ruie followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
There is also hereby provided an apparatus comprising: means for defecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; means for detecting a eel! update event at said radio device before completing processing of said reconfiguration message at said radio device; means for selecting at said radio device one of said first and second configurations for said connection; and means for controlling said radio device to transmit a cell update message including an indication for the radio access network of the seiected configuration.
There is also hereby provided an apparatus comprising: means for controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; means for thereafter detecting in a transmission by said radio device a celi update message, which ceil update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and means for proceeding further with the connection according to the configuration selected by the radio device.
There is also hereby provided an apparatus comprising: means for detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; means for detecting a ceil update event before comp!eting processing of said reconfiguration message at said radio device; means for controlling said radio device to transmit a ceil update message after detecting said cell update event; thereafter detecting in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and means for adopting at the radio device the configuration selected by the radio access network.
There is also hereby provided an apparatus comprising: means for controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; means for thereafter detecting at said radio access network in a transmission by said radio device a ceil update message indicating uncompleted processing of the reconfiguration message at the radio device; means for selecting at said radio access network a configuration for the connection; and means for controlling a transmitter of the radio access network to transmit a cell update confirm message including an indication of the configuration selected by the radio access network for the connection.
There is also hereby provided a computer program product comprising program code means which when loaded into a computer controls the computer to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and follow a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network.
There is also hereby provided a computer program product comprising program code means which when loaded into a computer controls the computer to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a ceil update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowledgment for a response message to the reconfiguration message; and proceed further with the connection at least partly on the basis of Information stored at the radio access network about a predetermined rule followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
There is also hereby provided a computer program product comprising program code means which when loaded into a computer controls the computer to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; select at said radio device one of said first and second configurations for said connection; and control said radio device to transmit a cell update message including an indication for the radio access network of the selected configuration.
There is also hereby provided a computer program product comprising program code means which when loaded into a computer controls the computer to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message, which cell update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and proceed further with the connection according to the configuration selected by the radio device.
There is also hereby provided a computer program product comprising program code means which when loaded into a computer controls the computer to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event before completing processing of said reconfiguration message at said radio device; control said radio device to transmit a cell update message after detecting said cell update event; thereafter detect in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and adopt at the radio device the configuration selected by the radio access network, There is also hereby provided a computer program product comprising program code means which when loaded into a computer controls the computer to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect at said radio access network in a transmission by said radio device a cell update message indicating uncompleted processing of the reconfiguration message at the radio device; select at said radio access network a configuration for the connection; and control a transmitter of the radio access network to transmit a cell update confirm message including an indication of the configuration selected by the radio access network for the connection.
Some embodiments of the present invention are described in detail hereunder, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 illustrates an example of a radio access network in which embodiments of the present invention can be implemented;
Figure 2 illustrates an example of apparatus for use at a user equipment (UE) in Figure 1 ;
Figures 3a and 3b illustrate examples of apparatus for use at an access node in Figure 1;
Figure 4 illustrates an example of apparatus for use at a radio network controller of Figure 1 ;
Figure 5 illustrates an example of operations at UE and RNC in accordance with a first embodiment of the present invention; Figure 6 illustrates an example of operations at UE and RNC in accordance with a second embodiment of the present invention; and
Figure 7 illustrates an example of operations at UE and RNC in accordance with a third embodiment of the present invention.
Embodiments of the present invention are described in detail below for the example of a UMTS Terrestial Radio Access Network (UTRAN). However, the same kind of techniques are also applicable to other types of radio access networks.
Figure 1 illustrates a UMTS Terrestial Radio Access Network. The UTRAN comprises a collection of access nodes 2 respectively operating at least one cell. For simplicity, only a single UE 8 is shown in Figure 1 , but a large number of UEs would typically be within the coverage area of an access node at any one time.
In this example, the access nodes 2 are base stations (NodeBs) of a UTRAN, typically comprising thousands of such base stations each operating one or more cells. The coverage area of each cell depends on the transmission power and the directionality of the antenna by which the cell is operated. Alternatively, the access nodes may be a combination of network entities such as a remote radio head and server or host.
A radio network controller RNC 8 controls the operation of the NBs 2. Only one RNC 8 is shown in Figure 1 , but a UTRAN would typically comprise a large number of RNCs 8 each controlling a respective group of NBs. The RNCs 8 are all connected to a core network (CN) 10.
Figure 2 shows a schematic view of an example of user equipment or user device (UE) 6 that may be used for communicating with the NBs 2 of Figure 1 via a wireless interface. The UE 6 may be any device capable of at least sending or receiving radio signals to or from the NBs 2 of Figure 1.
UE 8 may, for example, be a device designed for tasks involving human interaction such as making and receiving phone calls between users, and streaming multimedia or providing other digital content to a user. Non-limiting examples include a smart phone, and a laptop computer/notebook computer/tablet computer/ e-reader device provided with a wireless interface facility.
The UE 8 may communicate via radio transceiver circuitry, unit or module 206 and associated antenna arrangement 205 comprising at least one antenna or antenna unit. The antenna arrangement 205 may be arranged internally or externally to the UE 2.
The UE 6 may be provided with: a baseband unit comprising one or more baseband processors 203; and at least one memory or data storage entity 217, The baseband processor 203 and one or more memory entities 217 may be provided on an appropriate circuit board and/or in chipsets, The memory or data storage entity 217 is typically internal but may also be external or a combination thereof, such as in the case when additional memory capacity is obtained from a service provider.
In the cases of devices designed for human interaction, the user may control the operation of the UE 6 by means of a suitable user Interface such as key pad 201 , voice commands, touch sensitive screen or pad, combinations thereof or the like. A display 215, a speaker and a microphone may also be provided. Furthermore, the UE 6 may comprise appropriate connectors (either wired or wireless) to other devices and/or for connecting external accessories, for example hands-free equipment, thereto. Figure 3a shows one example of apparatus for use at the NBs 2 of Figure 1. The apparatus comprises or is coupled to a radio frequency antenna array 301 (comprising at least one antenna or antenna unit) configured to receive and transmit radio frequency signals; radio transceiver circuitry, module or unit 303 configured to interface the radio frequency signals received and transmitted by the antenna array 301 ; and a baseband unit comprising one or more baseband processors 306. The apparatus usually comprises an interface 309 via which, for example, the baseband processor 306 can communicate with other network elements such as the core network (not shown). The baseband processor 308 is configured to process signals from the radio transceiver 303. It may also control the radio transceiver 303 to generate suitable RF signals to communicate Information to UEs or other eNBs via a wireless communications link, and also to exchange information with other network nodes such as RNC 8 across a wired link via the interface 309, The one or more memory or data storage units 307 are used for storing data, parameters andior instructions for use by the baseband processor 306. The memory or data storage entity may be internal or external (locating in another network entity) or a combination thereof.
Figure 3b illustrates another example of apparatus for use at the NBs of Figure 1. The apparatus is the same as that of Figure 3a except that the baseband unit comprising the baseband processor 306 is located remotely from the radio transceiver 303 and the antenna array 301 , and is connected to the radio transceiver 303 by e.g. a fibre optic link 311.
Figure 4 shows an example of apparatus for use at the RNC 8. The apparatus 400 includes one or more memories 407 for storing program code, and one or more data processors 406 for controlling the actions described below in accordance with program code stored at the one or more memories 407. The apparatus also comprises an interface 407 via which it can send and receive information to and from other network nodes, such as NBs 2 and a core network (CN) 10.
The memories 217, 307, 407 may be implemented using an suitable data storage technology, such as, for example, semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, The data processors 203, 308, 408 may, for example, include one or more of microprocessors, digital signal processors (DSPs) and processors based on a multi-core processor architecture.
References below to processors 203, 306, 408 controlling the operation of other elements of UE and NBs refer to the baseband processors operating in accordance with program code stored at memories 217, 307, 407,
It would be appreciated that the apparatus shown in each of figures 2, 3 and 4 described above may comprise further elements which are not directly involved with the embodiments of the invention described hereafter.
Embodiments of the invention are described below for the example of a UE 6 and radio access network operating in accordance with 3GPP TS 25.331, in which a ceil update event triggers a cell update procedure including the transmission of a RRC CELL UPDATE message by the UE 6. The CELL UPDATE message includes an information element (IE) named "Reconfiguration Status Indicator" (RSI) if either (a) the UE 8 happens to have received a RRC reconfiguration message e.g. RADIO BEARER RECONFIGURATION, TRANSPORT CHANNEL RECONFiGURATION or PHYSICAL CHANNEL RECONFIGURATION messages etc., but has not already sent a response message to the reconfiguration message, or (b) the UE 8 happens to have transmitted a response message to a received reconfiguration message but has not already received the RLC acknowledgment for the response message. On the other hand, the RSI IE is not included In the CELL UPDATE message if the UE 6 either (c) has not received a reconfiguration message sent by the radio access network, or (d) the reconfiguration process is already completed by the receipt of a RLC acknowledgment for a response message to a reconfiguration message. As mentioned above, the RSI IE Ss not included in the CELL UPDATE message for both cases (c) and (d), but the radio access network can determine which of these two cases (c) and (d) applies to UE from whether or not the radio access network has received a response to the reconfiguration message. Examples of cell update events are the detection at UE of a radio link failure or an RLC unrecoverable error.
The occurrence of a radio link failure at UE 8 in CELLJ3GH state is determined as the expiry of a Radio Resource Control (RRC) timer (timer T313) which is started in response to receiving a predetermined number of consecutive "out of sync" indications from layer 1 for an established physical channel, and continues to run unless a predetermined number of successive "in sync" indications are received from layer 1.
A possible scenario in which a RLC unrecoverable error is considered to have occurred is when RLC acknowledge mode is used for transmissions of transport blocks, and an error in the transmission of a transport block cannot be recovered even after the maximum permitted number of retransmissions of the transport block have been done and the subsequent RLC RESET procedure has also failed.
According to a first embodiment: whenever the processor 203 at UE 6 detects a cell update event has occurred during the processing of a reconfiguration message (STEP 502 of Figure 5), and the processor 203 of UE 6 includes the RSI IE in the CELL UPDATE message in accordance with the extent of processing of the reconfsgu ration message (STEP 504 of Figure 5), the processor 208 at UE follows a predetermined rule to select a predetermined one of the old and new configurations (STEP 508 of Figure 5). For example, the predetermined rule may be that UE 6 seiects the old configuration (i.e. the configuration without the change indicated in the reconfiguration message received from RNC 8). The predetermined rule is also stored at RNC 8, and when the processor 406 at RNC receives the CELL UPDATE message via the NB 2 operating the serving cell and via interface 409 (STEP 508 of Figure 5), and detects the inclusion of the RSI IE in the CELL UPDATE message, the processor 408 at RNC 8 can be certain about which configuration has been selected by UE 6; and the processor 406 at RNC 8 proceeds with the connection to UE 6 according to the configuration decided by the predetermined ru!e (STEP 510 of Figure 5).
If some UEs 8 do not support this functionality, then in order to provide RNC 8 with certainty about whether any individual UE is configured to follow the predetermined rule described above and to bring more clarity in the network for different UE behaviours, the processor 208 at UE 6 may, when first attaching to the UTRAN, control the transceiver 208 at UE 6 to make a transmission including an indication for RNC 8 that UE 6 follows the predetermined rule described above. Such indication could take the form of a new capability bit in the UE Radio Access Capability Information that a UE transmits to UTRAN when first attaching to UTRAN.
Shown below is one example for a new IE to be included in the UE Radio Access Capability message described in 3GPP TS 25.331 if the UE supports the functionality described above, 10.3.3,42 UE radio access ca ability
Figure imgf000021_0001
According to a second embodiment: whenever the processor 203 at UE 8 detects a cell update event has occurred during the processing of a reconfiguration message (STEP 802 of Figure 8), and the processor 203 at UE 6 determines that it is to include the RSI IE in the CELL UPDATE message in accordance with the extent of processing of the reconfiguration message (STEP 806 of Figure 8), the processor 203 al UE 8 first selects either the old or new configuration (STEP 604 of Figure 6), and additionally controls transceiver 208 to make a transmission including an indication for RNC 8 about which of the two configurations has been setected by UE 6 (STEP 808 of Figure 6). Such indication could take the form of an additional information element in the CELL UPDATE message. For example, the additional information element could be named "SELECTED NEW CONFIGURATION" and is included in the CELL UPDATE message only if the RSI IE Is included in the CELL UPDATE message and UE 8 has selected the new configuration. The RNC 8 receives the CELL UPDATE message via the NB 2 operating the serving cell and via interface 409. If the processor 406 at RNC 8 detects that both the RSI IE and the "SELECTED NEW CONFIGURATION" IE are included in the received CELL UPDATE message, then the processor 408 at RNC 8 proceeds with the connection to UE 6 according to the new configuration (i.e. including the change identified in the reconfiguration message sent earlier by RNC 8 to the UE 6). On the other hand, if the processor 408 at RNC 8 detects that the RSI IE is included ire the received CELL UPDATE message but is not accompanied by the "SELECTED NEW CONFIGURATION" IE, the processor 406 at RNC 8 proceeds with the connection according to the old configuration (i.e. without the change identified in the reconfiguration message sent earlier by the RNC to the UE) (STEP 810 of Figure 6).
Alternatively, the additional IE could be named "SELECTED CONFIGURATION", and set to "NEW" or OLD" according to the configuration that the processor 203 at UE 8 has selected.
Examples of additions to the Other Information Elements" section of the CELL UPDATE message specified in Section 10.2.7 of 3GPP TS 25.331 are shown below.
Figure imgf000022_0001
In the upper example, the addition is accompanied by an indication that "RSI" in the "Need" column means that this IE is mandatory if (i) the IE "Reconfiguration Status Indicator" is Included (I.e. set to "TRUE") and (ii) the UE has selected the new configuration; but that this IE is not needed otherwise. In the lower example, the addition is accompanied by an indication that "RSI" in the "Need" column means that this IE is mandatory if the IE "Reconfigu ration Status Indicator" is Included (i.e. set to "TRUE"), but that this IE is not needed otherwise.
If some UEs do not support this functionality, then in order to provide RNC 8 with certainty about whether any individual UE is configured to use the additional IE described above and to bring more ciarity about different UE behaviours, the processor 203 at UE 6 may, when first attaching to the UTRAN, control the transceiver 208 at UE 6 to make a transmission including an indication for RNC 8 that UE 6 uses the new SE described above. Such indication could take the form of a new capability bit in the UE Radio Access Capability Information that a UE transmits to UTRAN when first attaching to UTRAN,
According to a third embodiment: the processor 406 at RNC 8 decides what configuration to use for a connection with UE 8 in the event that RNC 8 receives a CELL UPDATE message from UE 6 including the RSI IE; the processor 406 at RNC sends out a message for UE 6 indicating the configuration decided by RNC 8; and the processor 203 at UE 6 follows the RNG's decision. One example of the operations at RNC 8 and UE 8 is illustrated in Figure 7, In response to the detection at the processor 203 of UE 6 of a cell update event during an early stage of processing a reconfiguration message received from RNC 8 (STEP 702 of Figure 7), the processor 203 of UE 8 controis the transceiver 208 of UE 8 to transmit a cell update message Including the RSI IE (STEP 704 of Figure 7). The processor 406 at RNC 8 receives the CELL UPDATE message via the NB 2 operating the cell serving UE 8 and via interface 409; and detects the inclusion of the RSI IE in the CELL UPDATE message (STEP 708 of Figure 7). The processor 408 at RNC 8 decides what configuration to use for the continuation of the connection with UE 8 (STEP 708 of Figure 7). The processor 406 at RNC 8 sends out a CELL UPDATE CONFIRM message for UE 6 including a new Information element indicating the configuration selected by RNC (STEP 710 of Figure 7), The selected configuration could be the old configuration (i.e. without the configuration change Indicated in the reconfiguration message sent earlier by the RNC), or the new configuration (I.e. including the configuration change indicated in the reconfiguration message sent earlier by the RNC), or a third configuration that differs in some aspect to both the old and new configurations. The processor 203 at UE 8 controls the transceiver at UE 6 to receive the CELL UPDATE CONFIRM message via NB 2, and the processor 203 at UE 8 proceeds with the connection according to the configuration indicated in the CELL UPDATE CONFIRM message (STEP 712 of Figure 7). If the configuration indicated in the CELL UPDATE CONFIRM message is different to the one currently adopted by UE 6, the processor 203 at UE 6 aborts the configuration if currently adopts and switches to the configuration indicated in the CELL UPDATE CONFIRM message.
If the processor 406 at RNC 8 decides on a third configuration for the connection with UE, the processor 406 at RNC 8 may include in the CELL UPDATE CONFIRM message complete details of the configuration that the UE 6 should adopt after completion of the cell update procedure, in response to detecting such instruction in the CELL UPDATE CONFIRM message, the processor 203 at UE 6 aborts the previous reconfiguration procedure, and restarts a reconfiguration process to the new configuration indicated in the CELL UPDATE CONFIRM message. For example, if the third configuration indicated in the CELL UPDATE CONFIRM message happens to include one or more changes {such as e.g. deletion of a transport channel) that were part of the reconfiguration identified in the earlier reconfiguration message of STEP 702s the processor 203 at UE 8 restarts the process of making these one or more changes to the old configuration (Le, the configuration without the changes indicated in the reconfiguration message received in STEP 702).
The techniques described above can all help to avoid an undesirable situation in which the UTRAM makes incorrect assumptions about the configuration of the connection with the UE at the end of the cell update process, resulting in failure to recover a call for which the connection was being used, and a waste of resources (e.g. transport channei and/or radio bearer) until the UE 8 enters the idle mode. The techniques can thus improve the call re-establishment success rate if and when a cell update event occurs during an on-going reconfiguration procedure.
The program code mentioned above may include software routines, applets and macros. Program code may, for example, be copied into the one or more memories 203, 307 from any apparatus-readable non-transitory data storage medium, Computer program codes may be coded by a programming language, which may be a high-level programming language, such as objective-C, Ct C++, C#, Java, etc., or a low-level programming language, such as a machine language, or an assembler.
Alternatively, some of the above-described functions or other functions performed at the UEs or eNBs may be implemented by application specific integrated circuits (ASICs).
The design of integrated circuits is by and large a highly automated process. Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate. Programs, such as those provided by Synopsys, Inc. of Mountain View, California and Cadence Design, of San Jose, California automatically route conductors and locate components on a semiconductor chip using well established rules of design as well as libraries of pre stored design modules. Once the design for a semiconductor circuit has been completed, the resultant design, in a standardized electronic format (e.g., Opus, GDSII, or the like) may be transmitted to a semiconductor fabrication facility or "fab" for fabrication,
In addition to the modifications explicitly mentioned above, it will be evident to a person skilled in the art that various other modifications of the described embodiment may be made within the scope of the invention.

Claims

1. A method, comprising: detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and following a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network.
2. A method, comprising: controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detecting in a transmission by said radio device a cell update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowledgment for a response message to the reconfiguration message; and proceeding further with the connection at least partly on the basis of information stored at the radio access network about a predetermined rule followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
3. A method according to claim 1 or claim 2, wherein said predetermined configuration is said first configuration,
4. A method, comprising: detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; detecting a cell update event at said radio device before comp!eting processing of said reconfiguration message at said radio device; selecting at said radio device one of said first and second configurations for said connection; and controlling said radio device to transmit a cell update message including an indication for the radio access network of the selected configuration.
5. A method according to claim 4, wherein said method comprises selecting said first configuration for said connection when detecting a cell update event prior to transmitting a response message to said reconfiguration message.
6. A method, comprising: controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configure ion to a second configuration for a connection between a radio device and said radio access network; thereafter detecting in a transmission by said radio device a cell update message, which cell update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and proceeding further with the connection according to the configuration selected by the radio device.
7. A method, comprising: detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detecting a cell update event before completing processing of said reconfiguration message at said radio device; controlling said radio device to transmit a cell update message after detecting said cell update event; thereafter detecting in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and adopting at the radio device the configuration selected by the radio access network.
9. A method, comprising: controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detecting at said radio access network in a transmission by said radio device a cell update message indicating uncompleted processing of the reconfiguration message at the radio device; selecting at said radio access network a configuration for the connection; and controlling a transmitter of the radio access network to transmit a cell update confirm message including an indication of the configuration selected by the radio access network for the connection.
8. A method according to any of claims 1 , 4 and 7, wherein said cell update event is a radio link failure or an unrecoverable transmission error.
10. An apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and fo!!ow a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a cell update procedure; and wherein said predetermined rule Is also stored at said radio access network.
11. An apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowledgment for a response message to the reconfiguration message; and proceed further with the connection at least partly on the basis of information stored at the radio access network about a predetermined rule followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
12. An apparatus according to claim 10 or claim 11 , wherein said predetermined configuration is said first configuration.
13. An apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; select at said radio device one of said first and second configurations for said connection; and control said radio device to transmit a cell update message including an indication for the radio access network of the selected configuration,
14. An apparatus according to claim 13, wherein the memory and computer program code are further configured to, with the processor, cause the apparatus to: select said first configuration for said connection when detecting a cell update event prior to transmitting a response message to said reconfiguration message,
15. An apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: contra! a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message, which cell update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and proceed further with the connection according to the configuration selected by the radio device.
16. An apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event before completing processing of said reconfiguration message at said radio device; control said radio device to transmit a cell update message after detecting said cell update event; thereafter detect in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and adopt at the radio device the configuration selected by the radio access network,
17. An apparatus comprising: a processor and memory including computer program code, wherein the memory and computer program code are configured to, with the processor, cause the apparatus to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect at said radio access network in a transmission by said radio device a cell update message indicating uncompleted processing of the reconfiguration message at the radio device; select at said radio access network a configuration for the connection; and control a transmitter of the radio access network to transmit a ceil update confirm message including an indication of the configuration selected by the radio access network for the connection.
18. An apparatus according to any of claims 10, 13 and 16, wherein said cell update event is a radio Sink failure or an unrecoverable transmission error.
19. An apparatus comprising: means for detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; means for detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and means for following a predetermined rule to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network,
20. An apparatus comprising; means for controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; means for thereafter detecting in a transmission by said radio device a cell update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowledgment for a response message to the reconfiguration message; and means for proceeding further with the connection at least partly on the basis of information stored at the radio access network about a predetermined rule followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
21. An apparatus comprising: means for detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; means for detecting a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; means for selecting at said radio device one of said first and second configurations for said connection; and means for controlling said radio device to transmit a cell update message including an indication for the radio access network of the selected configuration.
22, An apparatus comprising: means for controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio devsce and said radio access network; means for thereafter detecting in a transmission by said radio device a cell update message, which cell update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and means for proceeding further with the connection according to the configuration selected by the radio device.
23. An apparatus comprising: means for detecting at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; means for detecting a cell update event before completing processing of said reconfiguration message at said radio device; means for controlling said radio device to transmit a cell update message after detecting said cell update event; thereafter detecting in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and means for adopting at the radio device the configuration selected by the radio access network,
24. An apparatus comprising: means for controlling a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; means for thereafter detecting at said radio access network in a transmission by said radio device a ceil update message indicating uncompleted processing of the reconfiguration message at the radio device; means for selecting at said radio access network a configuration for the connection; and means for controlling a transmitter of the radio access network to transmit a cell update confirm message including an indication of the configuration selected by the radio access network for the connection.
25. A computer program product comprising program code means which when loaded into a computer controls the computer to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event at said radio device before completing processing of said reconfiguration message at said radio device; and follow a predetermined ruie to select at said radio device a predetermined one of said first and second configurations for said connection regardless of the extent of uncompleted processing of the reconfiguration message between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a control radio link control layer acknowledgment for a response message to the reconfiguration message; wherein said cell update event is an event triggering a cell update procedure; and wherein said predetermined rule is also stored at said radio access network,
28. A computer program product comprising program code means which when loaded into a computer controls the computer to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message indicating that uncompleted processing of the reconfiguration message at the radio device is somewhere between a stage (a) of receiving the reconfiguration message and a stage (b) of awaiting a radio link control acknowledgment for a response message to the reconfiguration message; and proceed further with the connection at least partly on the basis of information stored at the radio access network about a predetermined rule followed by the radio device and specifying the selection by the radio device of a predetermined one of said first and second configurations regardless of the extent of uncompleted processing of the reconfiguration message between stages (a) and (b).
27, A computer program product comprising program code means which when loaded into a computer controls the computer to: detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between the radio device and the radio access network; detect a ceil update event at said radio device before completing processing of said reconfiguration message at said radio device; select at said radio device one of said first and second configurations for said connection; and control said radio device to transmit a cell update message including an indication for the radio access network of the selected configuration.
28, A computer program product comprising program code means which when loaded into a computer controls the computer to: control a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect in a transmission by said radio device a cell update message, which cell update message indicates uncompleted processing of the reconfiguration message at the radio device, and indicates which of said first and second configurations has been selected by the radio device for the connection; and proceed further with the connection according to the configuration selected by the radio device.
29. A computer program product comprising program code means which when loaded into a computer controls the computer to; detect at a radio device in a transmission by a radio access network a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between said radio device and said radio access network; detect a cell update event before completing processing of said reconfiguration message at said radio device; control said radio device to transmit a cell update message after detecting said cell update event; thereafter detect in a transmission by the radio access network an indication of a configuration selected by the radio access network for the connection; and adopt at the radio device the configuration selected by the radio access network.
30, A computer program product comprising program code means which when loaded into a computer controls the computer to: controi a transmitter of a radio access network to transmit a reconfiguration message regarding a change from a first configuration to a second configuration for a connection between a radio device and said radio access network; thereafter detect at said radio access network in a transmission by said radio device a cell update message indicating uncompleted processing of the reconfiguration message at the radio device; select at said radio access network a configuration for the connection; and control a transmitter of the radio access network to transmit a cell update confirm message including an Indication of the configuration selected by the radio access network for the connection.
PCT/IB2013/053800 2013-05-10 2013-05-10 Cell update events during connection reconfigurations WO2014181155A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016171843A1 (en) * 2015-04-23 2016-10-27 Qualcomm Incorporated Resolving conflicting configuration parameters between cell reconfiguration and cell reselection procedures

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050068919A1 (en) * 2003-09-29 2005-03-31 M-Stack Limited Apparatus and method for handling cell update during reconfiguration in universal mobile telecommunications system user equipment
WO2006118717A1 (en) * 2005-04-28 2006-11-09 Motorola, Inc. Cell update process with reconfiguration status
WO2010125361A2 (en) * 2009-05-01 2010-11-04 Research In Motion Limited Methods and apparatus for handling measurement reports
WO2011091865A1 (en) * 2010-01-28 2011-08-04 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for managing security reconfiguration in a cellular communication system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050068919A1 (en) * 2003-09-29 2005-03-31 M-Stack Limited Apparatus and method for handling cell update during reconfiguration in universal mobile telecommunications system user equipment
WO2006118717A1 (en) * 2005-04-28 2006-11-09 Motorola, Inc. Cell update process with reconfiguration status
WO2010125361A2 (en) * 2009-05-01 2010-11-04 Research In Motion Limited Methods and apparatus for handling measurement reports
WO2011091865A1 (en) * 2010-01-28 2011-08-04 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement for managing security reconfiguration in a cellular communication system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016171843A1 (en) * 2015-04-23 2016-10-27 Qualcomm Incorporated Resolving conflicting configuration parameters between cell reconfiguration and cell reselection procedures
CN107534910A (en) * 2015-04-23 2018-01-02 高通股份有限公司 Solve cellular cell and reconfigure the configuration parameter to conflict between cell reselection code
US9949296B2 (en) 2015-04-23 2018-04-17 Qualcomm Incorporated Resolving conflicting configuration parameters between cell reconfiguration and cell reselection procedures

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