WO2010029827A1 - Procédé d’établissement d’une connexion dans un réseau de données par paquets et système associé - Google Patents

Procédé d’établissement d’une connexion dans un réseau de données par paquets et système associé Download PDF

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Publication number
WO2010029827A1
WO2010029827A1 PCT/JP2009/064083 JP2009064083W WO2010029827A1 WO 2010029827 A1 WO2010029827 A1 WO 2010029827A1 JP 2009064083 W JP2009064083 W JP 2009064083W WO 2010029827 A1 WO2010029827 A1 WO 2010029827A1
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WIPO (PCT)
Prior art keywords
network
resources
bearer
user equipment
data
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PCT/JP2009/064083
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English (en)
Inventor
Vincent Roger
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Nec Corporation
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Publication of WO2010029827A1 publication Critical patent/WO2010029827A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections

Definitions

  • the present invention relates to a packet data network (PDN) connection establishment method for a mobile radio communications network and to a related system and related network devices.
  • PDN packet data network
  • dynamic PDN connection establishment can be required between a User Equipment (UE) and the network and which commonly requires employment of a plurality of connection resources such as an initial bearer and a plurality of additional bearers, such establishment being controlled by separate core network signalling messages for each bearer.
  • UE User Equipment
  • connection resources such as an initial bearer and a plurality of additional bearers
  • such establishment being controlled by separate core network signalling messages for each bearer.
  • it is commonly found that such establishment can be disadvantageously complex, slow, generate relatively high signalling overhead, and be generally inefficient, in particular within a scenario where some additional bearers cannot be established immediately together with the initial bearer, e.g. due to sequential establishment of each bearer over the radio or due to radio bearer setup failure, and the associated signalling messages from network cannot be received at the UE and where attempted initiation of connection establishment can occur either in the network or the UE. Disadvantageous duplication and delay of such connection initiation can then arise.
  • the present invention seeks to provide for a method of seeking establishment of multiple bearer resources between UE and a mobile radio communications network, and related system and network communication devices, and having advantages over known such methods, systems and network communication devices.
  • a method of seeking establishment of additional bearer resources to be established between UE and a PDN for packet network connectivity including the step of identifying at the UE a plurality of those additional resources, that is combined resources, that are to be established by the network in combination with an initial bearer resource such that, at least for an initial period, the UE can be prevented from seeking initiation of the establishment of the same said plurality of additional resources.
  • a UE would not be able to identify the network initiated additional resources and would be aware of said resources only when they effectively succeed to be established, i.e. only when the UE receives the associated additional bearer resource request signaling messages from the network.
  • a UE could trigger the UE initiated additional bearer resource establishment for any UE requested additional resources immediately upon initial bearer resource setup, while the network is still trying to establish additional resources in combination with this initial resource during the PDN connection setup. This would lead to redundancy and signalling duplication when the UE initiates the same bearer resources allocation as the network.
  • the said network initiated additional resources can be identified by way of data associated therewith, and such as traffic flow data conveyed by said resources, and/or Quality of Services (QoS) data of the said resources.
  • QoS Quality of Services
  • This data comprises a particularly accurate and efficient means for identifying the said plurality of additional bearer resources being established by the network in combination with the initial bearer resource setting up the PDN connection.
  • the said data can be received by the UE together with the bearer context request core network signalling message sent by the network when establishing the initial bearer resource setting up the PDN connection.
  • the said data can be included within an Information Element (IE) of said bearer context request.
  • IE Information Element
  • the said data can be included within an IE in the radio access network message carrying said bearer context request signalling message.
  • the said data though re-describing the additional bearers to be established by the network, which description will later be received by the UE in the additional bearer resource request messages from the network, has much less redundancy and duplication than the UE requested bearer resource allocation request messages that would be sent by the UE otherwise, thereby leading to an efficient signalling load reduction.
  • the method can include the step in the UE of retrieving the said data from a storage element inserted within the UE.
  • said data can be provisioned by the network at subscription and later can be dynamically modified by the network via over the air (OTA) mechanisms.
  • OTA over the air
  • the said initial period can, if required, be effectively finite the said initial period can also be determined by way of a timer.
  • Further advantageous aspect of the method of the present invention is a step of identifying at the UE a plurality of those additional resources, that is UE requested additional resources, that are either pre-configured in the UE before the PDN connection or requested by applications during the PDN connection procedure and not identified as among the said plurality of network initiated additional resources, such that the UE can immediately seek initiation of those UE requested additional resources with the insurance that the network is not establishing the same resources.
  • a UE would not be able to identify whether one or more UE requested additional bearer resources are already being established by the network as part of the PDN connection.
  • a UE could delay its UE requested additional bearer resources allocation procedure until a finite time controlled by a timer has expired, during which the UE would receive the network initiated additional bearer resources requests, such that the UE would only establish UE requested additional bearer resources that were not yet established by the network during this delay.
  • the UE could wait until all network initiated bearer resources are successfully established, provided that the UE is given the knowledge of the number of these additional resources and that said resources are successfully established before the waiting timer expired.
  • such an arrangement helps avoid delays that would otherwise occur for the establishment of those UE initiated additional resources not identified as among the said plurality of network initiated additional resources.
  • a further advantageous aspect of the method of the present invention is that of the UE can retrieve, before the PDN connection initiation, data identifying pre-configured additional resources for the PDN connection, and required to be set up and ready for use immediately upon PDN connection.
  • Such data corresponding to the pre-configured UE-requested additional resources can be sent by the UE to the network in the PDN connection request signalling message requesting the network to setup the PDN connection.
  • the network can then also immediately establish those UE-requested additional resources in combination with the initial bearer and the network initiated additional resources, so as to avoid the UE initiated bearer resource allocation procedures after the initial bearer allocation.
  • the said UE requested additional resources can be identified by way of data associated therewith, and such as traffic flow data conveyed by said resources, and/or Quality of Services (QoS) data of the said resources.
  • QoS Quality of Services
  • This data comprises a particularly accurate and efficient means for identifying the said plurality of UE requested additional bearer resources within the PDN connection request signalling message to enforce the network to establish such resources immediately at PDN connection instead of the UE establishing those resources after the initial bearer resource allocation, and thus helps avoiding signalling duplication and delays for establishing such resources.
  • mobile radio communications UE arranged for multiple bearer resources establishment with a packet data network, and including means for identifying a plurality of the additional resources that are to be established by the network in combination with the initial bearer setting up a PDN connection, and means arranged to prevent, at least for an initial period, the initiation by the UE of the establishment of the same said network initiated additional resources, thereby advantageously avoiding signalling duplication.
  • the UE can be arranged for operation in accordance with the various aspects of the method as outlined above.
  • the UE can be arranged for use with data associated with the resources, such data comprising traffic flow data and/or QoS data.
  • the UE can be arranged to receive a media element therein from which the said data can be received, or can be arranged to receive the said data from the network together with the initial bearer request signalling message.
  • the UE can include timing means for determining the said initial period.
  • the UE can be arranged to initiate establishment of UE requested additional resources not identified as among the said plurality of network initiated resources immediately after retrieving said data upon the initial bearer setup, thereby advantageously avoiding delay in the UE for establishing said UE requested additional resources
  • the UE can be arranged to retrieve data identifying additional bearer resource required by the UE and pre-configured in the UE before the PDN connection and transmitting said data to the network in the PDN connection request message such that the network can establish those UE requested additional resources during the PDN connection in addition to the network initiated initial and additional bearer resources, thereby avoiding subsequent UE initiated bearer resource allocation procedures after the initial bearer setup and thus achieving signalling reduction.
  • a mobile radio communications network element arranged for use in the establishment of multiple bearer resources between a user equipment and a packet data network, and arranged to deliver to the user equipment data identifying a plurality of the network initiated additional bearer resources that are to be established by the network in combination with the initial bearer at PDN connection such that, at least for an initial period, the user equipment can be prevented from seeking an initiation of the establishment of the said resources.
  • the network element can be arranged to deliver the said data at the beginning of a packet data network connection procedure, and further to deliver the said data together with the bearer context request signaling message establishing the initial bearer resource of the PDN connection.
  • the network element can be arranged to receive data identifying additional bearer resource required by the UE, together with the PDN connection request message such that the network can establish those UE requested additional resources during the PDN connection in addition to the network initiated bearer resources, such that the UE is prevented to initiate subsequent UE initiated bearer resource allocation procedures after the initial bearer setup and thus achieving signalling reduction.
  • the invention can also provide for a multiple bearer PDN communication system including a user equipment and a network element as outlined above.
  • a data structure including a portion serving to identify for a UE a plurality of network initiated additional resources that are to be established by the network such that, at least for an initial period, the user equipment can be prevented from seeking initiation of the establishment of the said plurality of network initiated additional resources.
  • the said portion can include traffic flow data and/or QoS data associated with the said plurality of network initiated additional resources.
  • the data structure can comprise the traffic flow and QoS data provided within an IE of the bearer context request signalling message establishing the initial bearer resource of the PDN connection, or alternatively within the radio access network message carrying the bearer context request message.
  • a data structure including a portion serving to identify for a network a plurality of UE requested additional resources that are to be established by the network during the PDN connection in addition to the network initiated initial bearer and additional bearer resources such that the UE is further not required to trigger the UE initiated bearer resource allocation procedures after the initial bearer establishment.
  • the said portion can include traffic flow data and/or QoS data associated with the said plurality of UE requested additional resources.
  • the data structure can comprise the traffic flow and QoS data for each traffic flow provided within an IE of the PDN connection request signalling message sent by the UE to the network.
  • the present invention can provide for further information containing reference to the network initiated additional traffic flows and QoS associated with the dedicated bearers established by the network in combination with the default bearer and which is conveyed between the UE and the network together with the default bearer request from the network.
  • This advantageously prevents the UE from requesting allocation of the same-network initiated additional resources, and as an alternative allows the network to control such establishment of these resources so as to avoid duplication of allocation requests.
  • This also advantageously allows the UE to start immediately the establishment of UE initiated additional resources not identified among the network initiated additional resources so as to avoid delays for initiating allocation of those additional resources.
  • the present innovation can further provide further information containing reference to the UE requested additional traffic flows and QoS associated with resources pre-configured in the UE, and which is conveyed between the UE and the network in the PDN connection request from the UE, advantageously avoiding signalling duplication and delays that would otherwise occur when the UE is required to initiate subsequent UE requested bearer resource establishment procedures after the initial bearer setup.
  • This can achieve simplified and faster PDN connection with the multiple bearers and with an advantageously reduced signalling load on the air interface.
  • Fig. 1 is a signalling diagram of an example of resource allocation illustrating signalling duplication disadvantages as currently known
  • Fig. 2 is a signalling diagram of an example of resource allocation illustrating signalling delay disadvantages as currently known
  • Fig. 3 is a signalling diagram of an example of resource allocation in accordance with one embodiment of the present invention illustrating advantageous avoidance of signalling duplication;
  • Fig. 4 is a signalling diagram of an example of resource allocation in accordance with one embodiment of the present invention illustrating advantageous avoidance of signalling delay
  • Fig. 5 is a flow diagram indicating implementation of one embodiment of the present invention within a user equipment
  • Fig. 6 illustrates the structure for the further data arising in accordance with the present invention and referred to as the network initiated additional resources which is sent by the network together with the initial bearer request signalling message
  • Fig. 7 illustrates an example of structure for the further data arising in accordance with an embodiment of the present invention, and referred to as the UE requested additional resources which is sent by the UE together with the PDN connectivity request signalling message
  • Fig. 6 illustrates the structure for the further data arising in accordance with the present invention and referred to as the network initiated additional resources which is sent by the network together with the initial bearer request signalling message
  • Fig. 7 illustrates an example of structure for the further data arising in accordance with an embodiment of the present invention, and referred to as the UE requested additional resources which is sent by the UE together with the PDN connectivity request signalling message
  • Fig. 8 is a schematic diagram of a user equipment arranged for use in accordance with an embodiment of the present invention.
  • Fig. 1 and Fig. 2 comprise a signalling diagram relating to resource-allocation requests arising in relation to a prior art scenario for PDN connection.
  • Fig. 1 and Fig. 2 are discussed further below and, as will be appreciated, such a scenario has arisen out of particular 3GPP-related requirements for IP connectivity between a User Equipment (UE) and a Public Land Mobile Network (PLMN) external Packet Data Network (PDN) by way of a PDN connectivity service, such connectivity being provided by way of an Evolved Packet System (EPS) as described in section 4.7 of 3GPP SA2 TS 23.401 v 8.2.0.
  • EPS Evolved Packet System
  • a so-called "attach” procedure is employed to allow connectivity to an initial PDN to be established when the UE first attaches to the EPS. Any required connectivity to an additional PDN can be initiated by the UE by way of a so- called "UE requested PDN connectivity” procedure as is known from Section 5.10 of the aforementioned 3GPP reference and also from Section 6.5.1 of 3GP CT1 TS 24.301 v 0.4.0.
  • EPS bearer is established and is arranged to remain active throughout the lifetime of the PDN connection so as to provide for "always-on" IP connectivity to that particular PDN.
  • SDF Service Data Flows
  • QoS Quality of Service
  • Such additional EPS bearers i.e. the so-called dedicated bearers, are always established by the network as is known from the Section 5.4.1 of reference 3GPP SA2 TS 23.401 v 8.2.0.
  • the establishment can be triggered by the network itself, the said establishment can alternatively be triggered by the UE and by way of a "UE-requested bearer resource allocation" procedure known from Section 5.4.5 of SA2 TS23.401 v 8.2.0.
  • the UE can be arranged to inform the network concerning the traffic flows and associated QoS to be established, and the network is then arranged to decide upon which of the existing, or new, dedicated bearers such traffic flows are to be met and then initiates the dedicated bearers activation or modification procedure towards the UE.
  • the said dedicated bearers are only established subsequent to the establishment of the PDN connection, that is, once the said default bearer has been established.
  • the establishment of the dedicated bearer(s) is typically triggered by the launch of a new application, or by an existing application requiring new traffic flows with specific QoS, such as VoIP requirements, on an existing PDN connection such as, for example, a PDN for IP Multimedia Subsystem (IMS) services.
  • IMS IP Multimedia Subsystem
  • Annex F of 3GPP SA2 TS 23.401 v 8.2.0 discloses a combined procedure wherein the network can initiate the activation of dedicated bearers either as part of the above-mentioned "attach” procedure or as part of the UE requested "PDN connectivity" procedure over the EUTRAN.
  • the dedicated bearers are established by the network in combination with the default bearer and so as to prevent the UE requesting establishment of the same dedicated resources immediately following the default-bearer establishment.
  • the Non-Access Stratum Packet Data Units (NAS-PDUs) conveying the signalling messages for the dedicated bearer establishment as defined in section 8.3.3 of 3GPP CT1 TS 24.301 v 0.4. 0 are then handled together with the NAS-PDU for the default bearer establishment as defined in section 8.3.6 of the aforementioned reference 3GPP CT1 TS 24. 301 v 0.4.0.
  • the other proposal employs the serial transfer of multiple successful NAS PDUs and with the NAS PDUs sent sequentially, each of them is transported in one SI-AP and one RRC message. It is appreciated however that a single SI-AP message could also be used to transport all NAS-PDUs.
  • the UE is still not aware of all additional bearer resources to be established by the network in combination with the initial bearer resource, either because the associated additional NAS-PDUs are not received by the UE when radio bearer setup fails or because these additional NAS-PDUs are sent after the initial NAS-PDU for the initial bearer resource.
  • the UE cannot then identify the reason for the non-establishment of the traffic flows and QoS for additional resources which are not established at PDN connection in additional bearers combined with the initial bearer and which are required by the UE that is the UE cannot identify whether the network intends to establish such traffic flows/QoS during the PDN connection, or whether the network does not initiate their establishment.
  • current UE could alternatively delay its UE-requested bearer resource allocation procedures.
  • Such UE is arranged to wait either for the expiration of finite time controlled by a timer or for the reception of all dedicated bearer activation messages from the network, provided that the UE is given the knowledge of the number of these bearers and that these bearers are successfully established before the waiting timer expired.
  • the UE would receive some additional network-initiated bearer resource requests, and then establish only additional bearers which are requested by UE and not established by the network during this PDN connection period, and this impact is described further below with reference to Fig. 2 and using the second alternative as example (multiple successful NAS PDUs transmitted sequentially over the air).
  • Fig. 1 there is illustrated signalling arising between the User Equipment Non-Access-Stratum UE NAS 10, the User Equipment Access- Stratum UE AS 12, an radio network element eNB14 and a core network element MME (Mobility Management Entity, associated with a serving Gateway and a PDN-Gateway) 16 in accordance with a known proposal.
  • MME Mobility Management Entity
  • the UE NAS 10 issues a PDN connectivity request 18 and which can be delivered either at the time of attachment for an initial PDN connection, or in a stand alone manner for additional PDN connections.
  • the UE 10 has an expectation to have the following traffic flows (Service Data Flows SDF)/QoS available for reader use, namely (SDF-a (packet filters - a), QoS-1),and (SDF-b (packet filters - b), QoS- 2).
  • Packet filters are commonly described in Traffic Flow Template (TFT) information element.
  • the default bearer is established together with the required dedicated bearers such as, for example:
  • Bearer-1 (dedicated): TFT with SDF-a (packet filter-a), QoS-1 ,
  • Bearer-2 TFT with SDF-b (packet filter-b), QoS-2.
  • An initial context set-up request, or bearer set-up request 20 is then delivered from the MME 16 to the eNB 14.
  • the aforementioned setup request 20 includes a list of SAE bearers to be setup which can comprise the following:
  • SAE Bearer ID1 Activate Dedicated Bearer Context Request
  • the SAE bearers 0 and 2 are accepted, while SAE bearer 1 is rejected.
  • a Radio Resource Controller (RRC) connection reconfiguration signal 24 is then sent from the eNB 14 to the UE AS 12 and which contains a list of radio bearers to be setup comprising: RB IDO, NAS-PDUO RB ID2, NAS-PDU2 and which, does not therefore contain an entry for bearer 1 as suggested by step 22.
  • RRC Radio Resource Controller
  • a bearer establishment indication signal 26 is delivered from the UE AS12 to the UE NAS 10 and which again has no entry for the rejected bearer 1 and so comprises:
  • NAS-PDU2 Activate Dedicated Bearer Context Request.
  • bearer resource allocation request signal 32 delivered to the network
  • NAS- PDU 1 Activate Dedicated Bearer Context Request signal 34 delivered to the UE NAS 10.
  • TFT Traffic Flow Template
  • the UE knows which traffic flows/QoS are expected to be established by the network in the dedicated bearers established in combination with the default network. Then, . advantageously, the UE will not initiate the UE-requested bearer resource establishment procedure for the traffic flows/QoS that have not been received at the UE, for example due to radio bearer establishment failure and so will wait the network to establish them.
  • the network establishes these bearers in combination with the default bearer during PDN connection, and for those that failed to be established, the network will try to re-establish them at a later stage when more appropriate without any request from the UE. This advantageously avoids unnecessary signalling load from the UE.
  • a PDN connectivity request signal 44 is again delivered from the UE NAS 36 to the MME 42 which, as with the signalling illustrated in Fig. 1 , can originate at the time of attachment for an initial PDN connection, or in a stand alone manner for an additional PDN connection. Indeed, the same traffic flows/QoS "SDF-a (packet filter - a), QoS -1" and "SDF-b (packet filter- b), QoS - 2" is likewise expected to be available for immediate use at the UE 36, 38.
  • the network serves to establish the default bearers together with the dedicated bearers which again particularly for comparative purposes can comprise:
  • Bearer-1 (dedicated): TFT with SDF-a (packet filters-a), QoS-1
  • Bearer-2 TFT with SDF-b (packet filters-b), QoS-2
  • the MME 42 In response to the receipt of the PDN connectivity request 44, the MME 42 returns an initial context setup request or bearer setup request 46 which, as will be appreciated below, is configured in accordance with a particular embodiment of the present invention.
  • the request 46 contains a list of SAE bearers to be setup and which again can comprise:
  • NAS-PDU2 Activate Dedicated Bearer Context Request.
  • the NAS-PDUO contains an additional data element according to an embodiment of the invention, or so called “combined resource information" and which serves to describe the traffic flows/QoS to be established by the network 42 and as associated with the required dedicated bearers.
  • step 48 it is confirmed that the eNB 40 is arranged to accept the SAE bearers 0 and 2, while rejecting the SA bearer 1.
  • an RRC connection configuration signal 50 is again delivered from the eNB40 to the UE AS 38 and having a list of radio bearers to be setup comprising:
  • the UE AS 38 delivers a bearer establishment indication signal 52 to the UE NAS 36 and which can comprise:
  • NAS-PDU2 Activate Dedicated Bearer Context Request.
  • a pair of signals 54, 56 are delivered from the UE NAS 36 to the network and in particular the MME 42 and which comprise, respectively, NAS - PDUs - "activate default bearer context accept” for bearer 0 and NAS - PDUs - "activate dedicated bearer context accept” for bearer 2.
  • the UE 36, 38 readily identifies that "SDF-a (packet filter-a) QoS-1" is not available, but also that the network is trying to establish that bearer resource.
  • Fig. 2 The further limitation of the prior art relating to signaling-delay disadvantages is illustrated in Fig. 2.
  • the same user equipment 10, 12 and network elements 14, 16 are illustrated and the signalling discussed below arises in relation to an initial PDN connection request 11 from the UE at the time of attachment for an initial PDN connection, or indeed a stand alone for an additional PDN connection as will be noted, when this PDN connection is to be established, the UE is prearranged for immediate use of the following traffic flows/QoS:
  • Bearer-1 (dedicated); TFT with SDF-a (packet filter-a), QoS-1 ,
  • Bearer-2 TFT with SDF-b (packet filter-b), QoS-2.
  • an RRC connection reconfiguration signal 15 (RB IDO, NAS-PDUO) is delivered from the eNB 14 to the UE AS 12 which in turn delivers a bearer establishment indication signal 17 (SAE Bearer IDO, NAS-PDUO- Activate Default Bearer Context Request) from the UE AS12 to the UE NAS 10.
  • the UE Upon reception of the initial bearer setup indication 17, the UE sends back an Activate Default Bearer Context Accept to the MME, not shown in the figure for simplicity purpose, and then, to avoid duplicating allocation requests for additional resources that may also be initiated by the network, the UE does not trigger UE initiated bearer resource requests but instead starts a "wait timer 1 and only after expiry of such timer decides if resource allocation requests will be required for currently missing resources such as:
  • the network continues to establish the additional bearer resources that are configured to be established in combination with the initial bearer.
  • two subsequent bearer setup requests 19 (SAE Bearer ID1 , NAS-PDU 1 - Activate Dedicated Bearer Context Request) and then 21 (SAE Bearer ID2, NAS PDU2 -Activate Dedicated Bearer Context Request) are delivered from the MME 16 to the eNB 14.
  • eNB 14 rejects bearer 1 and accepts bearer 2 and thus eNB sends an RRC connection Reconfiguration 23 (RB ID2, NAS-PDU2) to the UE AS 12 which sends and indication of bearer 2 establishment 25 (SAE Bearer ID2, NAS-PDU2) to the UE NAS 10.
  • the UE 10, 12 Upon receipt of the signalling related to NAS-PDU2, the UE 10, 12 serves to remove SDF-b(packet filter-b), QoS-2 from the missing resources, and sends back an activate dedicated bearer context accept to the MME 16, which signal is not shown here for simplicity purpose.
  • the UE 10, 12 can await further resource establishment signalling from the network.
  • An application within the UE 10, 12 is arranged to request a new resource during the PDN connection such as, (SDF-d (packet filter-d), QoS-4).
  • SDF-d packet filter-d
  • QoS-4 QoS-4
  • the 'wait timer 1 is still running and thus the UE adds this new resource to the list of UE requested missing additional bearer resources instead of starting UE requested bearer resource allocation. In this manner, the UE 10, 12 waits for expiry of the aforementioned timer before initiating the associated resource allocation request.
  • the network continues to establish additional resources in combination with the initial resource and, in the illustrated example the network attempts to re-establish SAE Bearer-1 (SDF-a (packet filter-a), QoS-1).
  • SDF-a packet filter-a
  • QoS-1 SAE Bearer-1
  • the UE 10, 12 serves to identify the missing additional resources and initiate the related bearer resource allocation: (SDF-a (packet filter-a), QoS-1), (SDF-c (packet filter-c, QoS-3), (SDF-d (packet filter-d, QoS-4).
  • SDF-a packet filter-a
  • QoS-1 packet filter-a
  • SDF-c packet filter-c, QoS-3
  • SDF-d packet filter-d, QoS-4
  • Bearer resource allocation requests 27, 29, 31 having delivered from the UE 10,12 to the MME 16 and comprising respectively, "SDF-a (packet filter- a), QoSI", “SDF-c(packet filter-c), QoS-3” and “SDF-d (packet filter-d), QoS-4".
  • the bearer resource allocation procedures for the UE 10 requested resource SDF c (packet filter-c), QoS-3 (pre-configured in UE) and (SDF-d (packet filter-d), QoS-4) (requested during the PDN connection) are delayed until "wait timer 1 expiry.
  • the UE when receiving the NAS-PDU for the default bearer activation, the UE already knows which traffic flows/QoS the network is trying to establish via the subsequent ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST. On this basis, if the UE needs to request additional resources which are not being established by the network, the UE can immediately start the UE-requested bearer resource allocation procedure without waiting for the reception of all NAS-PDUs associated with the combined dedicated bearers or timer period expiry. Resolution of this further limitation is illustrated in Fig. 4.
  • UE 10, 12 is again illustrated and PDN connection request 11 from UE 10, 12 is followed by the establishment of the initial bearer (default bearer) with the same signaling 13, 15 and 17 as previously illustrated in relation to Fig. 2.
  • the UE 10, 12 is prearranged for immediate use of the following traffic flows/QoS:
  • SDF-a packetet filter-a
  • QoS-1 packet filter-a
  • SDF-b packetet filter-b
  • QoS-2 packet filter-b
  • SDF- c packet filter-c
  • QoS-3 the network is arranged to establish the additional resources (SDF-a (packet filter-a), QoS-1), (SDF-b (packet filter-b), QoS-2) in combination with the initial bearer.
  • the UE 10, 12 Upon reception of the initial bearer setup indication 17, the UE 10, 12 sends back an activate default bearer context accept to the MME 16, not shown here for simplicity purpose.
  • the UE 10, 12 serves to identify that the sources (SDF-a (packet filter-a, QoS-1) and (SDF-b (packet filter-b), QoS-2) are not available and that the network is trying to establish it. Thus, the UE does not initiate the associated UE-requested bearer resource allocation procedures for these additional resources.
  • the UE 10, 12 upon initial bearer setup, the UE 10, 12 immediately commences its bearer resource allocation for the UE-requested resource not identified as being established by the network. Thus, the UE initiates a bearer resource allocation request 33 for the additional resource (SDF-c (packet filter- c), QoS-3) to the network element 16.
  • SDF-c packet filter- c
  • QoS-3 the additional resource
  • the network continues to establish the additional bearers and initiates the bearer setup request messages 35 and 37 for the resources (SDF-a (packet filter-a, QoS-1) and (SDF-b (packet filter-b), QoS-2) respectively.
  • the UE 10, 12 Upon reception of the additional bearer setup indication 41 , 47, the UE 10, 12 sends back an activate default bearer context accept for each bearer to the MME 16, not shown here for simplicity purpose.
  • an application requests new resource during PDN connection: (SDF-d (packet filter-d), QoS-4).
  • SDF-d packet filter-d
  • QoS-4 packet filter-d
  • the network element 16 then continues to re-establish the failed resources (SDF-a (packet filter-a), QoS-1) and additionally proceeds with the UE requested bearer resource allocation requested 49 for SDF-d (packet filter- d), QoS-4.
  • the UE 10, 12 was able to initiate the UE requested bearer resource allocation for additional resources not identified as being establish by the network, immediately after the reception of the initial bearer setup as illustrated in signal 33 for resources preconfigured in the UE (SDF-c (packet filter-c), QoS-3), and immediately when required by the application as illustrated in signal 49 for resources required after the initial bearer setup (SDF- d (packet filter-d), QoS-4).
  • SDF-c packetet filter-c
  • QoS-3 resources preconfigured in the UE
  • SDF- d packetet filter-d
  • QoS-4 the disadvantageous signalling delay of the prior art does not arise in accordance with the present invention.
  • the new 'combined resources info 1 used to avoid signaling duplication as illustrated in Fig. 3 and further used to avoid signaling delay as illustrated in Fig. 4 contains following new information:
  • this information can be provisioned in the USIM, and eventually can be modified by the network operator over the air.
  • This information is specific for a particular PDN and is provided by the network to the UE upon PDN connection at attach procedure or UE-requested PDN connection procedure.
  • the UE could also inform the network about the requested traffic flows & QoS to be established by the network during PDN connection.
  • This additional traffic flow & QoS data may be pre-configured in the UE and not known by the network.
  • a new "requested combined resources info 1 can be provided by the UE to the network in PDN CONNECTIVITY REQUEST, signal 44 in Fig. 3 and signal 11 in Fig. 4, corresponding to the UE requested additional resources described above in the present invention.
  • the network may directly establish these additional resources during the PDN connection without the need for the UE to initiate UE-requested bearer resource allocation procedure afterwards.
  • FIG. 5 there is provided a flow diagram illustrating the steps required for implementing an embodiment of the present invention within the UE.
  • the PDN connection procedure commences at 60 where the UE retrieves the UE request additional resources pre-configured in the UE for that PDN connection and sends this data in the PDN connection request to the network.
  • the UE retrieves the new information 'combined resources info 1 either from a new information element from the NAS-PDU or from USIM. If it is retrieved from USIM, it can be retrieved upon SIM insertion.
  • the UE checks 64 if they are present in 'combined resources info 1 . If present at 66, the process continues via 68 and the UE does not initiate the UE-requested bearer resource allocation procedure, and the UE waits at 70 for the network to establish.
  • the process continues via 72 and the UE initiates the UE-requested bearer resource allocation procedure 74 immediately after receiving the NAS PDU ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST.
  • the UE may start a timer during which the UE waits the network to re-establish these resources. If the timer expires, the UE may initiate the UE- requested bearer resource allocation procedure to force the network to reestablish these resources.
  • the method proposed in this innovation consists of following steps for the Network side:
  • the MME adds together with the NAS PDU ACTIVATE DEFAULT EPS BEARER CONTEXT REQUEST the 'combined resources info' containing the network initiated additional resources and, if any, the UE requested additional resource received in the PDN connection request and accepted by the network
  • the MME memorises that these dedicated bearers have failed and that the MME shall try to re-establish when more appropriate (eNodeB change, random retries... ).
  • Fig. 6 there is provided an indication of one, of many possible examples, of the structure for the "combined resources information" data arising in accordance with the present invention and in which Packet filter identifier and Packet filter contents contain an aggregation of all packet filters of the TFT information elements of all ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST associated to the dedicated bearers that are established by the network in combination with the default bearer.
  • the QoS aggregate contains an aggregation of all QoS (QCI, GBR) of the SDF QoS information elements of all ACTIVATE DEDICATED EPS BEARER CONTEXT REQUEST associated to the dedicated bearers that are established by the network in combination with the default bearer.
  • QCI QoS Class Identifier
  • GBR Guard Bit Rate
  • Fig. 7 there is provided an illustrated embodiment of the data structure for the "requested combined resource information" data that can be sent as described above within the PDN connectivity request.
  • the network ideally needs to know the QoS for each packet filter to be established in order to map these flows on dedicated bearers and so that a possible structure is as illustrated in Fig. 7.
  • the data structure used for the 'requested combined resource info 1 as illustrated in Fig. 7 could also be used for the 'combined resource info' instead of the smaller data structure as illustrated in Fig. 6 in order to allow the UE to know the mapping of Traffic flow/QoS for each bearer to be established. This would alternatively give additional information to the UE, but achieve less signaling reduction.
  • FIG. 8 there is provided a schematic diagram of a mobile radio communications UE according to that embodiment of the present invention.
  • a mobile radio communications device handset 76 including standard transmit/receive 78 functionality and arranged to operate under the control of a processor 80 and related memory functionality 82.
  • location control functionality 84 is provided for controlling the manner in which the UE -requested bearer resource allocation is deployed.
  • the resource control functionality includes processing means 86 for identifying the traffic flows and QoS associated with dedicated bearers to be established by the network during a PDN connection procedure, and in combination with the establishment of the default bearer.
  • processing means 86 for identifying the traffic flows and QoS associated with dedicated bearers to be established by the network during a PDN connection procedure, and in combination with the establishment of the default bearer.
  • inhibiting means 88 which serves to prevent the handset 76 from seeking initiation of the UE-requested bearer resource allocation procedure for those identified resources as to be established by the network.
  • the handset 76 can include a timer function 90 serving to control the duration of the period for which the inhibited means 86 serves to prevent such handset - initiated resource allocation procedure.
  • This information allows the UE to avoid initiating the UE-requested bearer resource allocation procedure for the same resources being established by the network if they failed to be established during the PDN connection.
  • This information allows the network to establish immediately during the PDN connection the resources pre-configured in the UE, thereby avoiding the UE to initiate the UE-requested bearer resource allocation procedure after the initial bearer establishment.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé visant à établir des ressources supplémentaires de supports multiples entre un équipement d’utilisateur et un réseau de données par paquets, les supports multiples étant généralement appelés à être mis en place par le réseau pendant l’établissement d’une connexion sur le réseau de données par paquets en combinaison avec une ressource initiale de support et comprenant la fourniture d’un élément d’information supplémentaire contenant des données de flux de trafic et de qualité de service associées aux ressources de supports, acheminé entre l’équipement d’utilisateur et l’élément de réseau au début de la procédure de connexion des supports de données par paquets et servant à empêcher l’équipement d’utilisateur de demander l’allocation de ces ressources à la suite de la connexion de données par paquets et, au lieu de cela, à permettre au réseau de contrôler l’établissement de ces ressources, et servant également à permettre à l’équipement d’utilisateur de déclencher immédiatement une demande d’allocation de ressources supplémentaires portant sur des ressources non établies par le réseau, de façon à éviter la duplication et les retards liés à ces demandes d’allocation.
PCT/JP2009/064083 2008-09-15 2009-08-04 Procédé d’établissement d’une connexion dans un réseau de données par paquets et système associé WO2010029827A1 (fr)

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WO2018175893A3 (fr) * 2017-03-23 2018-10-25 Qualcomm Incorporated Configurations de qualité de service pour des supports radio comprenant de multiples flux de données
WO2019096393A1 (fr) * 2017-11-16 2019-05-23 Huawei Technologies Co., Ltd. Dispositif client, dispositif de réseau d'accès, procédé et programme informatique pour établir un support radio de données
EP3512245A4 (fr) * 2016-09-30 2019-08-14 Huawei Technologies Co., Ltd. Procédé de communication sans fil, équipement utilisateur et dispositif de réseau d'accès
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CN110213799A (zh) * 2016-03-29 2019-09-06 电信科学技术研究院有限公司 一种下行小数据传输方法及装置
CN114760710A (zh) * 2016-08-01 2022-07-15 三星电子株式会社 用于管理无线通信网络中的数据通信的方法和设备
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EP3512245A4 (fr) * 2016-09-30 2019-08-14 Huawei Technologies Co., Ltd. Procédé de communication sans fil, équipement utilisateur et dispositif de réseau d'accès
US10917901B2 (en) 2017-03-23 2021-02-09 Qualcomm Incorporated Quality of service configurations for radio bearers with multiple data flows
WO2018175893A3 (fr) * 2017-03-23 2018-10-25 Qualcomm Incorporated Configurations de qualité de service pour des supports radio comprenant de multiples flux de données
US12010718B2 (en) 2017-03-23 2024-06-11 Qualcomm Incorporated Quality of service configurations for radio bearers with multiple data flows
CN110856223B (zh) * 2017-05-05 2020-10-27 华为技术有限公司 通信方法、集中式单元、分布式单元、基站及终端设备
CN110856223A (zh) * 2017-05-05 2020-02-28 华为技术有限公司 通信方法、集中式单元、分布式单元、基站及终端设备
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CN111373834A (zh) * 2017-11-16 2020-07-03 华为技术有限公司 用于建立数据无线承载的客户端设备、接入网设备、方法及计算机程序
CN111373834B (zh) * 2017-11-16 2022-05-24 华为技术有限公司 用于建立数据无线承载的客户端设备、接入网设备、方法及计算机程序
WO2019096393A1 (fr) * 2017-11-16 2019-05-23 Huawei Technologies Co., Ltd. Dispositif client, dispositif de réseau d'accès, procédé et programme informatique pour établir un support radio de données

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