WO2016171602A1 - Station de base, entité de communication et procédés associés permettant d'acheminer un flux de données associé à un équipement utilisateur - Google Patents

Station de base, entité de communication et procédés associés permettant d'acheminer un flux de données associé à un équipement utilisateur Download PDF

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Publication number
WO2016171602A1
WO2016171602A1 PCT/SE2016/050278 SE2016050278W WO2016171602A1 WO 2016171602 A1 WO2016171602 A1 WO 2016171602A1 SE 2016050278 W SE2016050278 W SE 2016050278W WO 2016171602 A1 WO2016171602 A1 WO 2016171602A1
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WO
WIPO (PCT)
Prior art keywords
wlan
base station
indication
mobility event
communication entity
Prior art date
Application number
PCT/SE2016/050278
Other languages
English (en)
Inventor
Helka-Liina Määttanen
Torsten DUDDA
Stefan Wager
Riikka Susitaival
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Publication of WO2016171602A1 publication Critical patent/WO2016171602A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route
    • H04W40/36—Modification of an existing route due to handover

Definitions

  • the object is achieved by a method performed by a communication entity, for assisting a base station in controlling a data flow related to a user equipment, UE.
  • the data flow is routed according to any one out of: via a cellular radio network, via a Wireless Local Area Network, WLAN, and via both the cellular radio network, and the WLAN.
  • the method comprising:
  • the communication entity estimates a WLAN mobility event.
  • the communication entity assists the base station in controlling the data flow by sending an indication about the WLAN mobility event to the base station.
  • the object is achieved by a base station for controlling a data flow related to a user equipment, UE.
  • the data flow is adapted to be routed according to any one out of: via a cellular radio network, via a Wireless Local Area Network, WLAN, and via both the cellular radio network and the WLAN 102.
  • the base station is configured to: Obtain from a communication entity, an indication about a WLAN mobility event, and control the data flow based on the obtained indication.
  • Figure 1 shows an example of a potential LTE-WLAN aggregation architecture based on split bearer architecture.
  • the user plane data may be split at the Packet Data Convergence Protocol (PDCP) layer among LTE link to the UE such as Radio Link Control (RLC), LTE- Medium Access Control (MAC), LTE- Physical Layer (PHY), and WLAN link to the UE such as IEEE 802.1 1 logical link control (LLC), MAC, and PHY.
  • IEEE 802.1 1 is a set of MAC and PHY specifications for implementing WLAN computer communication e.g. in the 900 MHz and 2.4, 3.6, 5, and 60 GHz frequency bands.
  • PDUs Packet Data Convergence Protocol
  • data may need to be adapted.
  • an additional header identifying the logical channel the PDCP PDU belongs to may be added to the PDU.
  • the adaptation layer may reside as shown in Figure 1 in the eNB, or also in a WLAN node.
  • Non-access stratum NAS describes functions in the LTE wireless telecom protocol stack between the CN and the UE.
  • RRC protocol layer exists in a UE and an eNB, it is part of LTE air interface control plane.
  • WLAN mobility may be optimized with proprietary methods, e.g. WLAN mobility may be more seamless in terms of shorter data interruption or delays e.g. between APs that belong to the same so called mobility domain.
  • a mobility domain may be e.g. a list of APs, or all APs belonging to the same AC.
  • a mobility domain may include multiple ACs and thus all APs controlled by the ACs.
  • a UE/STA is able to transfer AP more seamlessly within a mobility domain.
  • the base station such as an eNB gets to know, preferably prior to handover about the coming WLAN mobility event. In this way, data interruption and delivery delays may be avoided during WLAN mobility as data may be routed to the UE using the LTE link while WLAN link has an interruption.
  • Two or more APs operate in the WLAN 102 whereof two, a first AP 11 l and a second AP 112 are depicted in Figure 2.
  • a data flow may be routed via the cellular radio network 101 such as e.g. LTE, via a WLAN 102 or via both the cellular radio network 101 such as e.g. LTE, and the WLAN 20 102.
  • the WLAN 102 may be aggregated to the cellular network 101 .
  • the base station 1 10 may route data such as PDCP data via LTE while there is an interruption on the WLAN side.
  • the signalling may also include estimated time to the interruption and estimated duration of the interruption.
  • the estimated duration for the interruption may for example be estimated by the time a WLAN authentication method typically takes.
  • the indication about the WLAN mobility event may be obtained explicitly or implicitly from the communication entity 120, 130, 140. This will be described more in detail below.
  • the WLAN mobility event may relate to any one or more out of:
  • the communication entity 140 is represented by the UE 120.
  • the indication about the WLAN mobility event is obtained from the UE 120 according to any one out of:
  • the base station 1 10 controls the data flow based on the obtained indication.
  • the controlling of the data flow may comprise controlling the routing of the data flow.
  • the base station 1 10 controls the data flow by routing the data related to the UE 120 only via the cellular radio network 101 .
  • the base station 1 10 may route the data flow only via the WLAN 102, or via both the cellular radio network 101 such as e.g. LTE, and the WLAN 102.
  • the data flow may be routed via a cellular radio network 101 such as e.g. LTE, via a WLAN 102 or via both the cellular radio network 101 such as e.g. LTE, and the WLAN 102.
  • a cellular radio network 101 such as e.g. LTE
  • WLAN 102 may be aggregated to the cellular network 101 .
  • the cellular radio network 101 is a wireless communication network or cellular communications network such as an LTE, WCDMA, GSM network, any 3GPP cellular network, Wimax, or any cellular network or system.
  • the base station 1 10 may be a radio base station, for example an eNB, an eNodeB, or an Home Node B, an Home eNode B or any other network node capable to serve a user equipment or a machine type communication device in a cellular radio network.
  • a radio base station for example an eNB, an eNodeB, or an Home Node B, an Home eNode B or any other network node capable to serve a user equipment or a machine type communication device in a cellular radio network.
  • the WLAN 102 may e.g. be a WiFi network.
  • the base station 1 10 may e.g. explicitly or implicitly, obtain from a communication entity 120, 130 such as e.g. a WT node 130 or a UE 120, an indication about an upcoming WLAN mobility event such as a change from a first AP 1 1 1 of the WLAN 102 to a second AP 1 12 of the WLAN 102 for the UE 120.
  • a communication entity 120, 130 such as e.g. a WT node 130 or a UE 120
  • an indication about an upcoming WLAN mobility event such as a change from a first AP 1 1 1 of the WLAN 102 to a second AP 1 12 of the WLAN 102 for the UE 120.
  • the indication about the WLAN mobility event may further comprise any one or more out of: estimated time to the interruption related to the change to the second AP 1 12, and estimated duration of the interruption related to the change to the second AP 1 12.
  • the communication entity may be represented by any one or more out of a communication node or wireless communication network node.
  • the communication entity may be represented by any one out of: a WLAN
  • Termination, WT, node 130 which WT node 130 e.g. may be co-located with any one out of the base station 1 10, the first AP 1 1 1 , the second AP 1 12, a WLAN Access Controller, AC.
  • the communication entity may further be represented by the UE 120.
  • the base station or an obtaining module 710 therein may be configured to perform this action.
  • the base station 1 10 may route the data related to the UE 120 only via the cellular radio network 101 such as e.g. LTE.
  • the base station or a routing module 720 therein may be configured to perform this action.
  • the base station 1 10 may re-route the data or part of the data related to the UE 120 via the WLAN 102 again.
  • the base station or the routing module 720 therein may be configured to perform this action.
  • the data flow is routed according to any one out of: via a cellular radio network 101 , via a Wireless Local Area Network, WLAN, 102, and via both the cellular radio network 101 and the WLAN.
  • WLAN Wireless Local Area Network
  • the method may comprise the following actions, which actions may be taken in any suitable order.
  • the communication entity 120, 130 estimates a WLAN mobility event. How this is done will be described more in detail below.
  • the WLAN mobility event may comprise a change from a first, AP 1 1 1 of the WLAN
  • the communication entity 120, 130 assists the base station 1 10 in controlling the data flow by sending an indication about the WLAN mobility event to the base station 1 10.
  • Assisting the base station 1 10 in controlling the data flow may comprise assisting the base station 1 10 in controlling the routing of the data flow.
  • the indication about the WLAN mobility event may comprise an indication that no more data shall be forwarded to the WT node 130 of the WLAN 102 and an indication of packets of the data flow that are lost.
  • the indication about the WLAN mobility event may relates to an interruption of the data routed via the WLAN 102.
  • the indication about the WLAN mobility event further comprises any one or more out of: Estimated time to the interruption related to the change to the second AP 1 12, and estimated duration of the interruption related to the change to the second AP 1 12.
  • the indication about the WLAN mobility event may be sent explicitly or implicitly to the base station 1 10.
  • the communication entity 140 is represented by a WT node
  • the indication about the WLAN mobility event may be sent to the base station 1 10 according to any one out of: Implicitly, by sending flow control feedback message elements for an FC protocol to the base station 1 10, and explicitly, by sending a signalling message over an application layer protocol to the base station 1 10.
  • the communication entity 140 is represented by the UE 120.
  • the indication about the WLAN mobility event may be sent to the base station 1 10 from the UE 120 according to any one out of:
  • the communication entity 140 is represented by the WT node 130.
  • the WT node 130 may be co-located with any one out of: The base station 1 10, the first AP 1 1 1 , the second AP 1 12, a WLAN Access Controller, AC.
  • the data flow may be routed via a cellular radio network 101 such as e.g. LTE, via a WLAN 102 or via both the cellular radio network 101 such as e.g. LTE, and the WLAN 102.
  • a cellular radio network 101 such as e.g. LTE
  • WLAN 102 or via both the cellular radio network 101 such as e.g. LTE, and the WLAN 102.
  • This means that the WLAN 102 may be aggregated to the cellular network 101 .
  • the method may comprise the following actions, which actions may be taken in any suitable order.
  • the communication entity 120, 130 such as the WT node 130 or the UE 120 may estimate an upcoming WLAN mobility event such as a change from a first AP 1 1 1 of the WLAN 102 to a second AP 1 12 of the WLAN 102 for the UE 120.
  • the communication entity 120, 130 such as the WT node 130 or the UE 120, or an estimating module 810 therein may be configured to perform this action.
  • the communication entity 120, 130 such as the WT node 130 or the UE 120 may send, e.g. explicitly or implicitly, an indication about the upcoming AP change to the base station 1 10.
  • the indication may enable the base station 1 10 to route the data related to the UE 120 only via the cellular radio network 101 such as e.g. LTE.
  • the indication about the AP change may relate to an interruption of the data routed 10 via the WLAN 102.
  • the indication about the AP change may further comprise any one or more out of: estimated time to the interruption related to the change to the second AP 1 12, and estimated duration of the interruption related to the change to the second AP 1 12.
  • the communication entity may be represented by a WLAN Termination, WT, node 15 130, which WT node 130 e.g. may be co-located with any one out of the base station 1 10, the first AP 1 1 1 , the second AP 1 12, a WLAN Access Controller, AC.
  • WT Wireless Local Area Network
  • the communication entity may further be represented by the UE 120
  • the communication entity 120, 130 such as the WT node 130 or the UE 120, or a sending module 820 therein may be configured to perform this action.
  • the eNB such as the base station 1 10 may be informed about an upcoming WLAN mobility event potentially associated with a data interruption if not properly dealt with.
  • the eNB such as the base station 1 10 may mitigate the potential data interruption based on the obtained information.
  • the eNB such as the base station 110 informed by the WT such as the WT node 130
  • the WT such as the WT node 130 informs the eNB, such as 35 the base station 1 10, of a change of WLAN AP for a given UE such as the UE 120.
  • the change of WLAN AP may e.g. relate to an upcoming change or an ongoing change.
  • the change of WLAN AP may e.g. be from the first AP1 1 1 also referred to as a source AP, to the second AP 1 12 also referred to as the target AP.
  • the WT such as e.g. the WT node 130 to which the source AP belongs may estimate the upcoming mobility event.
  • the WT may inform the eNB such as the base station 1 10 in different ways, e.g.:
  • the base station 1 10 may be informed, such as receiving the indication about the WLAN mobility event from the WT node 130 inband, i.e. no explicit signaling is needed meaning that the indication is provided within existing signaling.
  • the WT node 130 may reuse flow control feedback message elements for a Flow Control (FC) protocol between the eNB such as the base station 1 10 and WT node 130.
  • FC Flow Control
  • feedback information may include following information:
  • Advertising desired buffer size as 0, that is no data packets in the buffer.
  • feedback information may include following information:
  • the UE 120 may also inform Basic Service Set Identifier (BSSID) or other details of the target AP if seen needed. This may be done even if the indication of HO is not included with the measurement reports which would likely include these by default.
  • BSSID Basic Service Set Identifier
  • base station 1 10 may comprise the following arrangement depicted in Figure 7. As mentioned above the data flow is adapted to be routed according to any one out of: via a cellular radio network 101 , via a Wireless Local Area Network, WLAN, 102, and via both the cellular radio network 101 and the WLAN 102.
  • the communication entity 140 is configured to be
  • the indication about the WLAN mobility event may be adapted to be obtained from the WT node 130 according to any one out of:
  • the base station 1 10 further being configured to, e.g. by means of the routing module 730 configured to, when the first AP 1 1 1 has been changed to the second AP 1 12 for the UE 120, re-route the data related to the UE 120 via the WLAN 102 again.
  • the communication entity 120, 130, 140 may comprise the following arrangement depicted in Figure 8.
  • the data flow is routed according to any one out of: via a cellular radio network 101 , via a Wireless Local Area Network, WLAN, 102, and via both the cellular radio network 101 and the WLAN 102.
  • the communication entity 120, 130, 140 is configured to, e.g. by means of an estimating module 810 configured to, estimate a WLAN mobility event.
  • the communication entity 120, 130, 140 further is configured to send the indication about the WLAN mobility event explicitly or implicitly to the base station 1 10.
  • a computer program comprises instructions, which when executed by the at least one processor 830, cause the at least one processor 830 to perform actions according to any of the Actions 501 -502 and 601 -602.
  • a carrier comprises the computer program, wherein the
  • the embodiments herein comprising the process of controlling a data flow related to a UE 120 and assisting the base station 1 10 in controlling a data flow related to a UE 120, may be implemented through one or more processors, such as the processor 720 in the base station 1 10 depicted in Figure 7 and a processor 830 in the communication entity

Abstract

L'invention concerne un procédé réalisé par une station de base, pour commander un flux de données associé à un équipement utilisateur (UE). Le flux de données est acheminé selon n'importe lequel des réseaux suivants : par l'intermédiaire d'un réseau radio cellulaire, par l'intermédiaire d'un réseau local sans fil (WLAN) et par l'intermédiaire à la fois du réseau radio cellulaire et du WLAN. Lorsque la station de base a obtenu (301), à partir d'une entité de communication, une indication concernant un événement de mobilité de WLAN, la station de base commande (302) le flux de données sur la base de l'indication obtenue.
PCT/SE2016/050278 2015-04-20 2016-04-04 Station de base, entité de communication et procédés associés permettant d'acheminer un flux de données associé à un équipement utilisateur WO2016171602A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562149702P 2015-04-20 2015-04-20
US62/149,702 2015-04-20

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WO2016171602A1 true WO2016171602A1 (fr) 2016-10-27

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Citations (3)

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Publication number Priority date Publication date Assignee Title
US20130088983A1 (en) * 2011-10-07 2013-04-11 Interdigital Patent Holdings, Inc. Method and apparatus for integrating different radio access technologies using carrier aggregation
US20140241183A1 (en) * 2013-02-27 2014-08-28 Telefonaktiebolaget L M Ericsson (Publ) Aggregation of carriers of a cellular radio network with carriers of an auxiliary network
US20140328318A1 (en) * 2013-05-06 2014-11-06 Qualcomm Incorporated Routing modification based on handover detection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130088983A1 (en) * 2011-10-07 2013-04-11 Interdigital Patent Holdings, Inc. Method and apparatus for integrating different radio access technologies using carrier aggregation
US20140241183A1 (en) * 2013-02-27 2014-08-28 Telefonaktiebolaget L M Ericsson (Publ) Aggregation of carriers of a cellular radio network with carriers of an auxiliary network
US20140328318A1 (en) * 2013-05-06 2014-11-06 Qualcomm Incorporated Routing modification based on handover detection

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"R2-151438 LTE-WLAN aggregation;", 3GPP TSG-RAN WG2 #89BIS;, Bratislava, Slovakia, XP050936366 *
"R2-152739 WLAN Selection and Mobility;", 3GPP TSG-RAN WG2 MEETING #90;, 25 May 2015 (2015-05-25), Fukuoka, Japan, XP050972996 *

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