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WO2015139729A1 - Configuration de supports de raccordement - Google Patents

Configuration de supports de raccordement Download PDF

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Publication number
WO2015139729A1
WO2015139729A1 PCT/EP2014/055354 EP2014055354W WO2015139729A1 WO 2015139729 A1 WO2015139729 A1 WO 2015139729A1 EP 2014055354 W EP2014055354 W EP 2014055354W WO 2015139729 A1 WO2015139729 A1 WO 2015139729A1
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WO
WIPO (PCT)
Prior art keywords
backhaul
bearers
network
user
configuring
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2014/055354
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English (en)
Inventor
Pontus Wallentin
Martin HESSLER
Ioanna Pappa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to PCT/EP2014/055354 priority Critical patent/WO2015139729A1/fr
Publication of WO2015139729A1 publication Critical patent/WO2015139729A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/22—Manipulation of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/32—Release of transport tunnels

Definitions

  • Embodiments presented herein relate to wireless backhaul networks, and particularly to a method, a network node, a computer program, and a computer program product for configuring backhaul bearers in a wireless backhaul network providing backhaul to an end-user access network.
  • One way of addressing this increase is to deploy lower-power network nodes, such as micro network nodes or pico network nodes, within the coverage area of a macro cell served by a macro network node.
  • additional network nodes may be deployed are scenarios where end-users are highly clustered. Examples where end-users may be highly clustered include, but are not limited to, around a square, in a shopping mall, or along a road in a rural area.
  • Such a deployment of additional network nodes is referred to as a heterogeneous or multi-layered network deployment, where the underlying layer of low-power micro or pico network nodes does not need to provide full- area coverage. Rather, low-power network nodes may be deployed to increase capacity and achievable data rates where needed.
  • LTE Long Term Evolution
  • telecommunications standards may be carried either over normal IMT-bands, e.g. the 2.6 GHz frequency band, or by running LTE baseband communications on higher radio frequencies, such as in the 28 GHz frequency band.
  • LTE based backhauling implies that the pico network nodes are connected to a client node which is used to create a wireless link to a hub node. In any of these two cases, the wireless links are typically managed by LTE core control mechanisms.
  • the LTE Mobility Management Entity may be utilized for session control of the LTE links
  • the Home Subscription Service may be utilized for storing security and Quality of Service (QoS) characteristics of the wireless links individual wireless end-user terminals embedded in the pico network node.
  • QoS Quality of Service
  • RRM Radio Resource Management
  • any LTE compliant traffic may need to end up in nodes such as the serving gateway (SGW) or the MME and any WiFi compliant traffic may end up in an edge router or an Evolved Packet Data Gateway (ePDG).
  • SGW serving gateway
  • ePDG Evolved Packet Data Gateway
  • QoS differentiation is provided to the end-users (i.e., to the wireless end-user terminals of the end- users) so that e.g. guaranteed bitrate (GBR) services, such as voice calls, will not be disturbed by best effort (BE) services, such as web browsing.
  • GLR guaranteed bitrate
  • BE best effort
  • QoS differentiation is needed also on the backhaul links.
  • the wireless backhaul is based on LTE, there are tools that provide both the routing functions and QoS differentiation, such as based on the LTE bearer concept.
  • one GBR and one BE bearer are established on the backhaul links.
  • VoIP Voice over Internet protocol
  • the data rate for VoIP may be in the order of lokbit/s, and loMbit/s may be regarded as the aggregated VoIP traffic for one RAT.
  • the data rate for web-surfing may be in the order of io Mbit/s, and lOoMbit/s may be regarded as the aggregated web-surfing traffic for one RAT.
  • the backhaul network carries mainly end- user traffic, which is dynamic, and the radio resources in the backhaul network is limited, e.g. limited bitrate. There is also a trade-off between bitrate and packet delay.
  • the traffic on the backhaul bearers served by a given hub node is a result of the aggregated traffic of all end-users connected to all the radio stations served by this hub node. But, since the end-users themselves are typically not visible by the hub node, the hub node may itself not be able to adapt its configurations to the end-user traffic.
  • An object of embodiments herein is to provide efficient configuration of backhaul bearers.
  • a method for configuring backhaul bearers in a wireless backhaul network providing backhaul to an end-user access network is performed by a network node.
  • the method comprises acquiring measurements and configuration information for end-user bearers in the end-user access network.
  • the method comprises determining a mapping between backhaul bearers in the wireless backhaul network and the end-user bearers based on the measurements and the configuration information.
  • the method comprises configuring the backhaul bearers based on the determined mapping.
  • this enables efficient utilization of radio backhaul resources.
  • this enables adaptation of backhaul links of the backhaul bearers to meet changing end-user traffic demands, e.g. when the load of one of the access types served by a client node in the wireless backhaul network is changed.
  • a network node for configuring backhaul bearers in a wireless backhaul network arranged to provide backhaul to an end-user access network.
  • the network node comprises a processing unit.
  • the processing unit is configured to execute a backhaul application server routine.
  • the backhaul application server routine comprises acquiring measurements and configuration information for end- user bearers in the end-user access network.
  • the backhaul application server routine comprises determining a mapping between backhaul bearers in the wireless backhaul network and the end-user bearers based on the
  • the backhaul application server routine comprises configuring the backhaul bearers based on the determined mapping.
  • a computer program for configuring backhaul bearers in a wireless backhaul network providing backhaul to an end-user access network the computer program comprising computer program code which, when run on a network node, causes the network node to perform a method according to the first aspect.
  • a computer program product comprising a computer program according to the third aspect and a computer readable means on which the computer program is stored.
  • any feature of the first, second, third and fourth aspects may be applied to any other aspect, wherever appropriate.
  • any advantage of the first aspect may equally apply to the second, third, and/or fourth aspect, respectively, and vice versa.
  • Other objectives, features and advantages of the enclosed embodiments will be apparent from the following detailed disclosure, from the attached dependent claims as well as from the drawings.
  • all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein.
  • All references to "a/an/the element, apparatus, component, means, step, etc.” are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise.
  • the steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
  • Figs la and lb are schematic diagrams illustrating a communications network according to embodiments
  • Fig 2a is a schematic diagram showing functional units of a network node according to an embodiment
  • Fig 2b is a schematic diagram showing functional modules of a network node according to an embodiment
  • Fig 3 shows one example of a computer program product comprising computer readable means according to an embodiment
  • Figs 4 and 5 are flowcharts of methods according to embodiments; and Fig 6 is a sequence diagram schematically illustrating data and control signalling between applications according to embodiments.
  • Fig la is a schematic diagram illustrating a communications network 10a where embodiments presented herein can be applied.
  • the communications network 10a comprises macro radio base stations (MBS) 12a, 12b providing wireless backhaul to pico radio base stations (PBS) 13a, 13b, 13c, 13d.
  • a pico radio base station may in this context be anything needing to communicate over a wireless backhaul network 10b (see, fig lb below); typical examples include, but are not limited to, 3GPP nodes, such as an LTE eNodeB, or a WiFi access point.
  • the macro radio base stations i2a-b are operatively connected to a core network 14 which in turn is operatively connected to a service providing Internet Protocol based network 15.
  • An end-user terminal (T) 11a, 11b served by a pico radio base station i3a-d is thereby able to access services and data provided by the IP network 15.
  • the pico radio base stations i3a-d and their respective links towards served end-user terminals 11a, 11b define an end-user access network 10c (see, Fig lb).
  • the pico radio base stations i3a-d may provide one or a combination of several radio access technologies over its radio access links, e.g. 3GPP LTE, 3GPP HSPA (high speed packet access), 3GPP GSM (global system for mobile communications) or IEEE 802.11X (WiFi).
  • the pico radio base stations I3a-d may have one or more wired interfaces towards the end-user terminals 11a, 11b. Each pico radio base station i3a-d needs to backhaul the end-user access network traffic and uses a wireless link towards a macro radio base station I2a-b for this purpose.
  • the communications network 10a further comprises a network node (NN) 21. Further details of the network node 21 will be provided below.
  • the pico radio base stations i3a-d may be backhauled by means of "client nodes" (CN) and "hub nodes" (HN). In general terms, the client node and the hub node are logical entities. The client node establishes a backhaul connection to the core network 14 via the hub node.
  • client node thus denotes the unit (or subunit within a micro or pico radio base station) that connects the micro or pico radio base station i3a-d to the hub node.
  • the hub node denotes the other end (with respect to the client node) of the wireless backhaul link where the wireless backhaul continues over a wired or wireless connection to the core network.
  • Fig lb is a schematic diagram illustrating a communications network where embodiments presented herein can be applied.
  • the communications network of Fig lb comprises a macro radio base station (MBS) 12a, a pico radio base station (PBS) 13a, and a network node 21.
  • Fig lb further schematically illustrates a wireless backhaul network 10b and an end-user access network 10c.
  • an end-user terminal (T) 11a is served by the pico radio base station 13a over a wireless link as defined by end-user bearers 19.
  • the macro radio base station 12a establishes backhaul bearers 18 so as to provide wireless backhaul over wireless links to the pico radio base station 13a.
  • a hub node 16a may be co-located with a macro radio base station 12a and a client node 17a may be co-located with a pico radio base station 13a.
  • the hub node 16a may be implemented in a macro radio base station
  • the client node 17a may be implemented in a micro radio base station or a pico radio base station 13a.
  • the pico radio base station i3a-d and client node 17a do not have to be co-located.
  • the communications network of Fig lb further comprises an optional backhaul application server (BAS) 20a.
  • BAS backhaul application server
  • the BAS 20a may be co-located with the network node 21 or optionally with a hub node 16a.
  • the communications network of Fig lb further comprises an optional backhaul client application unit (BCA) 20b.
  • BCA 20b may be co-located with a client node 17a.
  • the communications network of Fig lb further comprises an optional backhaul access node application unit (BANA) 20c.
  • BANA 20c may be co-located with a pico radio base station 13a.
  • the BCA 20b may be configured to interface the client node 17a.
  • the BANA 20c may be configured to interface a client node 13a, 13b, 13c, 13d.
  • the BCA 20b and the BANA 20c may run on or being operatively connected to the client node 17a or the pico radio bases station 13a, respectively. These applications may communicate with the BAS 20a, typically over a backhaul data bearer that is routed to the BAS 20a.
  • the BCA 20b and the BANA 20c may be configured by the BAS 20a, either statically or semi-statically with, for example, which measurements and configuration information to report to the BAS 20a.
  • the BAS 20a may be regarded as a piece of software that is located above the normal LTE protocol stacks for the backhaul links.
  • the BAS 20a may receive information from the BCA 20b and the BANA 20c.
  • the BAS 20a may transmit resource
  • the BAS 20a may be, for example, be located in the hub node 16a or in a dedicated network node 21. In the latter case the hub node 16a may route the data between the BAS 20a and the BCA 20b and the BANA 20c. The data may be routed through the client node 17a operatively connected to the hub node 16 and/or the network node 21 from the pico radio base station 13a.
  • the BAS 20a may transmit configuration data to the backhaul radio link scheduler in the hub node 16a to control the behavior of the backhaul radio links. This backhaul radio link scheduler controls the transmission of uplink and downlink data packets for each backhaul radio link. Further details of how the BAS 20a may receive signaling from the BCA 20b and the BANA 20c and transmit configuration information will be disclosed below.
  • the embodiments disclosed herein for example address means to control Quality of Service (QoS) differentiation of the traffic on the wireless links of the wireless backhaul network 10b.
  • QoS Quality of Service
  • the traffic on a particular wireless links may be regarded as a result of the aggregated traffic of all end-users connected to all the radio access technologies provided by all the client nodes 17a served by a particular hub node 16a.
  • One issue when setting up the bearers on the wireless links is to configure them with correct parameters.
  • the wireless backhaul network 10b carries mainly end user traffic, which in general terms is dynamic, and the radio resources on the wireless backhaul network 10b is limited (e.g., limited bitrate), thus resulting in a trade-off between bitrate and packet delay.
  • the embodiments disclosed herein particularly relate to configuring backhaul bearers 18 in a wireless backhaul network 10b providing backhaul to an end- user access network 10c.
  • a network node 21 a method performed by the network node 21, and a computer program comprising code, for example in the form of a computer program product, that when run on a network node 21, causes the network node 21 to perform the method.
  • Fig 2a schematically illustrates, in terms of a number of functional units, the components of a network node 21 according to an embodiment.
  • a processing unit 22 is provided using any combination of one or more of a suitable central processing unit (CPU), multiprocessor, microcontroller, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate arrays (FPGA) etc., capable of executing software instructions stored in a computer program product 31 (as in Fig 3), e.g. in the form of a storage medium 23.
  • a suitable central processing unit CPU
  • multiprocessor microcontroller
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate arrays
  • the storage medium 23 may also comprise persistent storage, which, for example, can be any single one or combination of magnetic memory, optical memory, solid state memory or even remotely mounted memory.
  • the network node 21 may further comprise a communications interface 24 for communications with any of at least one hub node 16a, at least one client node 17a, a BAS 20a, a BCA 20b, and a BANA 20c.
  • the communications interface 24 may comprise one or more transmitters and receivers, comprising analogue and digital
  • the processing unit 22 controls the general operation of the network node 21 e.g. by sending data and control signals to the communications interface 24 and the storage medium 23, by receiving data and reports from the communications interface 24, and by retrieving data and instructions from the storage medium 23.
  • Other components, as well as the related functionality, of the network node 21 are omitted in order not to obscure the concepts presented herein.
  • Fig 2b schematically illustrates, in terms of a number of functional modules, the components of a network node 21 according to an embodiment.
  • the network node 21 of Fig 2b comprises a number of functional modules; an acquire module 22a, a determine module 22b, and a configure module 22c.
  • the network node 21 of Fig 2b may further comprises any number of optional functional modules, such as a re-configure module 22d, an establish module 22e, a terminate module 22f, a maintain module 22g, an associate module 22h, and a transmit module 22j.
  • the functionality of each functional module 22a-j will be further disclosed below in the context of which the functional units may be used.
  • each functional module 22a-j may be implemented in hardware or in software.
  • the processing unit 22 may thus be arranged to from the storage medium 23 fetch instructions as provided by a functional module 22a-j and to execute these instructions, thereby
  • the network node 21 may be provided as a standalone device or as a part of a further device.
  • the network node 21 may be provided as part of a radio base station (MBS i2a-b or PBS i3a-d), such as an evolved Node B.
  • the network node 21 may be co-located with a radio resource management (RRM) functionality or with a Operation and Maintenance (O&M)
  • RRM radio resource management
  • O&M Operation and Maintenance
  • the network node 21 may be provided as an integral part of the radio base station. That is, the components of the network node 21 may be integrated with other components of the radio base station some components of the radio base station and the network node 21 may be shared. For example, if the radio base station as such comprises a processing unit, this processing unit may be arranged to perform the actions of the processing unit 22 of the network node 21. Alternatively the network node 21 may be provided as a separate unit in the radio base station.
  • Figs 4 and 5 are flow chart illustrating embodiments of methods for configuring backhaul bearers 18 in a wireless backhaul network 10b providing backhaul to an end-user access network 10c.
  • the methods are performed by the network node 21.
  • the methods are advantageously provided as computer programs 32.
  • Fig 3 shows one example of a computer program product 31 comprising computer readable means 33. On this computer readable means 33, a computer program 32 can be stored, which computer program 32 can cause the processing unit 21 and thereto
  • the computer program 32 and/or computer program product 31 may thus provide means for performing any steps as herein disclosed.
  • the computer program product 31 is illustrated as an optical disc, such as a CD (compact disc) or a DVD (digital versatile disc) or a Blu-Ray disc.
  • the computer program product 31 could also be embodied as a memory, such as a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or an electrically erasable programmable read-only memory (EEPROM) and more particularly as a non-volatile storage medium of a device in an external memory such as a USB (Universal Serial Bus) memory.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • the computer program 32 is here schematically shown as a track on the depicted optical disk, the computer program 32 can be stored in any way which is suitable for the computer program product 31.
  • Fig 4 illustrating a method for configuring backhaul bearers 18 according to an embodiment.
  • Parallel references are made to Figs la, lb, 2a, and 2b.
  • the backhaul bearers 18 are established in a wireless backhaul network 10b providing backhaul to an end-user access network 10c.
  • measurements and configuration information is collected in the client nodes 17a or in each of the pico radio base stations I3a-d.
  • the load from each end-user terminal 11a, 11b or each backhaul bearer 18 may be assumed to be associated to some QoS (the associated QoS can also be specified as a dynamic service requirement).
  • the measurements and configuration information is sent to the network node 21.
  • the processing unit 22 of the network node 21 is configured to, in a step S102, acquire measurements and configuration information for end-user bearers 19 in the end-user access network 10c. Triggered by the received measurements and configuration information, the network node 21 reconfigures the backhaul bearers 18 and their
  • the processing unit 22 of the network node 21 is configured to, in a step S104, determine a mapping between backhaul bearers 18 in the wireless backhaul network 10b and the end-user bearers 19 based on the measurements and the configuration information.
  • the processing unit 22 of the network node 21 is then configured to, in a step S106, configure the backhaul bearers 18 based on the determined mapping.
  • Steps S102, S104, S106 may be part of a backhaul application server routine.
  • a bearer (backhaul bearers 18 as well as end-user bearers 19) may be any combination of a 3GPP Evolved Packet System (EPS) bearer, a 3GPP radio bearer, a 3GPP radio access bearer, a 3GPP Packet Data
  • EPS Evolved Packet System
  • PDP Point-to-Point Protocol
  • DRB 3GPP Data Radio Bearer
  • SRB 3GPP Signalling Radio Bearer
  • IP IP data flow
  • TCP Transmission Control Protocol
  • UDP User Datagram Protocol
  • PPP Protocol layer 2 connection
  • FIG. 5 illustrating methods for configuring backhaul bearers according to further embodiments. Continued parallel references are made to Figs la, lb, 2a, and 2b.
  • the measurements and the configuration information may be acquired from at least one of the BCA 20b and the BANA 20c.
  • the configuration performed in step S106 may involve messages to be exchanged.
  • the configuring in step S106 may comprise an optional step Sio6h of transmitting resource reconfiguration messages related to the configuring to at least one of a BCA 20b and a BANA, 20c.
  • the measurements and the configuration information may be acquired independently of network operator of the pico radio base stations i3a-d.
  • the configuring in step S106 may additionally or alternatively comprise an optional step Sio6j of transmitting configuration information to a backhaul radio link scheduler of a hub node 16a in the wireless backhaul network 16a.
  • the resource reconfiguration messages may be end-user access technology agnostic and may be handled either using an application running in each pico radio base station I3a-d or client node 17a or by means of a centralized approach where a centralized node is assumed to provide measurements and configuration information to the network node 21. For both cases the the measurements and the
  • Non-configured settings may be treated in a default way, for example, as best-effort.
  • the measurements and the configuration information as acquired in step S102 may comprise load information and/or QoS indicators.
  • the load information and/or QoS indicators may relate to uplink and/or downlink load for each end-user bearer in the end-user access network 10c.
  • the load information and/or QoS indicators may relate to uplink and/or downlink queue length for each end-user bearer in the end-user access network 10c.
  • the load information and/or QoS indicators may relate to the number of end- users terminals 11a, 11b operatively connected to a pico radio base station 13a, 13b, 13c, 13d in the wireless backhaul network 10b for each type of radio access technology.
  • the load information and/or QoS indicators may relate to end-user terminal QoS settings and measurements related to a QoS
  • the load information and/or QoS indicators may relate to a combination of the above.
  • the load information and/or QoS indicators may be transmitted to the BAS 20a contained in signaling messages. These signaling messages may be transmitted to the BAS 20a using the backhaul bearers 18.
  • the network node 21 (and/or the BAS 20a) may be configured to, while collecting the measurements and the configuration information, evaluate the measurements against different criteria (such as thresholds) which in turn may trigger resource reconfiguration procedures.
  • resource reconfiguration procedures messages are transmitted (for example using the backhaul bearers 18) to the client node 17a and the pico radio base station 13a (and/or the BCA 20b and the BANA 20c).
  • the client node 17a and the pico radio base station 13a (and/or the BCA 20b and the BANA 20c) receive the messages and perform the needed actions to complete the resource reconfiguration, such as configuring end-user bearers 19.
  • the configuring in step S106 may be based on prioritization considerations. Different embodiments relating thereto will now be described in turn.
  • the configuring in step S106 comprises an optional step Sio6g of associating each one of the backhaul bearers 18 with a prioritization value.
  • the prioritization value may be embedded in at least one of the measurements and the configuration information. Alternatively the prioritization value is provided separately from the measurements and the configuration information.
  • the prioritization value may for example be provided from a management information base (MIB) via Simple Network Management Protocol (SNMP) signalling.
  • MIB management information base
  • SNMP Simple Network Management Protocol
  • the prioritization value may be based on the end-user terminal QoS settings.
  • step S106 may be triggered by the prioritization value.
  • the end-user bearers 19 may be configured with a value given the prioritization from the end users QoS settings.
  • This information may be implemented by forwarding relevant QoS measures for all the wireless terminals 11a, 11b operatively connected to the pico radio base stations 13a operatively connected to the client node 17a.
  • the information may either be collected, for example, directly from the pico radio base stations 13a, 13b, 13c, 13d or through reuse of available operations, administration and
  • the configuring in step S106 thus comprises an optional step Sio6a of re-configuring at least one existing backhaul bearer, an optional step Sio6b of establishing at least one new backhaul bearer, and/or an optional step Sio6c of terminating at least one existing backhaul bearer.
  • One bearer prioritization parameter which may be regarded as a trigger for resource reconfiguration is the load of the backhaul bearers 18.
  • the load may be defined in a number of ways, both in terms of bits but also in terms of value.
  • the load reporting may also be on a finer granularity than per backhaul bearer 18, for example per end-user bearer 19.
  • a group of services may be mapped by default to a best effort backhaul bearer 18 in order to have a basic service quality.
  • both WiFi traffic and best-effort LTE traffic is mapped to the same backhaul bearer 18.
  • a dedicated backhaul bearer 18 may be setup in the wireless backhaul network 10b.
  • the QoS indicators may correspond to the QoS classes.
  • a service i may also be an aggregation of a number of end-users services and classes.
  • all guaranteed bitrate end-user services for all the pico radio base stations 13a operatively connected to a client node 17a could form a single aggregated guaranteed bitrate backhaul service for the client node 17a.
  • This process may also include the possibility of removing a backhaul bearer 18.
  • Backhaul bearers 18 may then be jointly setup and removed in order to keep the number of backhaul bearer 18 at a specific number, such as 8 (eight) backhaul bearers 18.
  • the configuring as in any of steps S106, Sio6a, Sio6b, and Sio6c thus involves an optional step Sio6d l8 of maintaining a predetermined number of the backhaul bearers 18.
  • a backhaul bearer 18 dedicated to services i may be removed and a bearer for service types j may be setup if:
  • the configuring in step S106 may thus be based on service types.
  • the configuring in any of steps S106, Sio6a, Sio6b, Sio6c, and Sio6d may comprise an optional step Sio6f of configuring the backhaul bearers 18 also based on the service type information.
  • the end-user bearers 19 are associated with different radio access technology (RAT) types the configuring in any of steps S106, Sio6a, Sio6b, Sio6c, Sio6d, and Sio6f may comprise an optional step Sio6e of configuring the backhaul bearers 18 also based on the RAT type.
  • RAT radio access technology
  • the RAT type may be considered when configuring the backhaul bearers 18.
  • end-user bearers 19 for example a WiFi bearer should be dynamically setup when used.
  • One reason for separate end-user bearers 19 for different access technologies is to enable a QoS and prioritization differences between different access technologies. This is a special case of the above where T("WiFi bearer") is zero or relatively small.
  • T("WiFi bearer) is zero or relatively small.
  • the WiFi access point may have a different packet data network gateway (P-GW) compared to LTE. This is because the wireless terminal 11a, 11b will have separate IP connections (i.e., flows with different IP addresses).
  • P-GWs maybe physically situated at different physical location or logical entities, which imply that the bearers (backhaul bearers 18 as well as end-user bearers 19) may be routed differently.
  • Fig 6 is a sequence diagram schematically illustrating data and control signalling between applications according to any of the above disclosed embodiments for configuring backhaul bearers 18 in a wireless backhaul network 10b providing backhaul to an end-user access network 10c.
  • at least one of the BANA 20c, the BCA 20b, and the BAS 20a performs measurements.
  • At least the measurements of the BANA 20c and the BCA 20b relates to measurements and configuration information for end-user bearers 19 in the end-user access network 10c.
  • at least one criteria for at least one of these measurements and configuration information is fulfilled a
  • measurement report criterion is triggered at the BANA 20c and/or the BCA 20b for the herein disclosed configuration to be performed.
  • the configuration may alternatively or additionally be triggered by a reporting criteria of the BAS 20a being fulfilled.
  • the configuring may itself be based on checking of at least one resource (re-)configuration criterion is fulfilled. If not, further measurement reports may be checked. If the at least one resource (reconfiguration criterion is fulfilled resource (re-)configuration requests may be transmitted to the BCA 20b and/or the BANA 20c. Upon reception of the resource (re-)configuration request the BCA 20b and/or the BANA 20c may perform the (re-)configuration according to the resource (re-)configuration request.
  • the herein disclosed embodiments are applicable to further scenarios than those provided above. Examples of additional scenarios where the herein disclosed embodiments are applicable are summarized next.
  • the herein disclosed embodiments are applicable to issues relating to buffer status report using the Medium Access Control (MAC) protocol in LTE.
  • MAC Medium Access Control
  • the client node 17a serves multiple radio access technologies, for example a radio bases station using LTE, a radio bases station using HSPA, and/or a WiFi Access Point
  • the traffic originating from the different RATs is typically mapped on the same backhaul bearer 18. For example, best effort traffic using LTE, HSPA and WiFi is typically mapped on a best effort backhaul bearer.
  • each RAT each serves a multiple of wireless terminals na, lib.
  • the hub node 16a is responsible for prioritization of the different backhaul bearers 18 and as part of that it performs QoS reconfiguration of the backhaul bearers 18 as well as schedules the data transmitted on the backhaul bearers 18 according to the QoS configuration.
  • the hub node 16a will, according to the state of the art, receive "buffer status report” (BSR) messages from the client nodes 17a.
  • BSR buffer status report
  • the client node 17a indicates how much uplink data has been queued for each backhaul bearer 18.
  • the traffic on each backhaul bearer may represent traffic from different RATs (e.g.
  • LTE, HSPA and WiFi LTE, HSPA and WiFi
  • this information is not carried in the BSR message.
  • the hub node 17a will, according to the state of the art, not know which RAT that originated the traffic which triggered the BSR message. For example, it may be so that traffic from LTE or HSPA should be prioritized compared with traffic from WiFi.
  • the hub node 16a will not know the number of wireless terminals 11a, lib that are using each RAT. It may be so that traffic originating from a RAT with many connected wireless terminals 11a, lib should be prioritized compared with a RAT with few connected wireless terminals 11a, 11b.
  • OSPF Open Shortest Path First
  • a routing protocol such as OSPF may be used between the hub node 16a and its operatively connected client nodes 17a.
  • OSPF may typically be used to implement load-sensitive routing to ensure that the best route is selected in order to meet QoS even during high load or even congestion.
  • RRC 5340 a router may inform another router using a Link State Advertisement (LSA).
  • LSA Link State Advertisement
  • An LSA may contain information that represents e.g., the load and/or QoS for a given route. Using OSPF flooding, this information may traverse several steps.
  • OSPF may be used in the context of wireless backhauling.
  • OSPF is typically used between routers, not hosts or end-systems.
  • RSVP Resource Reservation Protocol
  • RSVP or RSVP-TE, RFC3209
  • RSVP is, according to the state of the art, used to reserve resources for an IP path with a given QoS along a path over a communications network.
  • RSVP may, according to the state of the art, also be used in traffic engineering scenarios, typically in combination with Multi- Path Label Switching (MPLS), to record information such as current traffic load along a path, using a so-called Record Route feature.
  • MPLS Multi- Path Label Switching
  • Record Route feature a so-called Record Route feature.
  • MPLS Multi- Path Label Switching
  • the state of the art fails to disclose how RSVP may be used in the context of wireless backhauling.

Landscapes

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

Abstract

L'invention concerne la configuration de supports de raccordement dans un réseau sans fil de raccordement assurant un raccordement vers un réseau d'accès d'usagers. Des mesures et des informations de configuration relatives à des supports d'usagers dans le réseau d'accès d'usagers sont acquises. Un mappage entre des supports de raccordement dans le réseau sans fil de raccordement et les supports d'usagers est déterminé sur la base des mesures et des informations de configuration. Les supports de raccordement sont configurés d'après le mappage déterminé.
PCT/EP2014/055354 2014-03-17 2014-03-17 Configuration de supports de raccordement Ceased WO2015139729A1 (fr)

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US10958511B2 (en) 2018-11-01 2021-03-23 At&T Intellectual Property I, L.P. Integrated access backhaul network architecture to support bearer aggregation for 5G or other next generation network
US11057791B2 (en) 2018-10-30 2021-07-06 At&T Intellectual Property I, L.P. Configuration and reconfiguration of aggregated backhaul bearers in a multi-hop integrated access backhaul network for 5G or other next generation network
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WO2020056749A1 (fr) * 2018-09-21 2020-03-26 Lenovo (Beijing) Limited Procédé et appareil pour sélection de nœud d'accès et de liaison terrestre intégré
CN112689973A (zh) * 2018-09-21 2021-04-20 联想(北京)有限公司 用于集成接入及回程节点选择的方法及设备
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CN114144979A (zh) * 2019-07-09 2022-03-04 瑞典爱立信有限公司 用于集成接入和回程的映射信息

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