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WO2018059703A1 - Communication de groupe au niveau de bordures de zone de couverture - Google Patents

Communication de groupe au niveau de bordures de zone de couverture Download PDF

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Publication number
WO2018059703A1
WO2018059703A1 PCT/EP2016/073373 EP2016073373W WO2018059703A1 WO 2018059703 A1 WO2018059703 A1 WO 2018059703A1 EP 2016073373 W EP2016073373 W EP 2016073373W WO 2018059703 A1 WO2018059703 A1 WO 2018059703A1
Authority
WO
WIPO (PCT)
Prior art keywords
wireless device
relay
group communication
access network
radio access
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/EP2016/073373
Other languages
English (en)
Inventor
Joakim ÅKESSON
Magnus TRÄNK
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/EP2016/073373 priority Critical patent/WO2018059703A1/fr
Publication of WO2018059703A1 publication Critical patent/WO2018059703A1/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
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0009—Control or signalling for completing the hand-off for a plurality of users or terminals, e.g. group communication or moving wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections

Definitions

  • Embodiments presented herein relate to a method, a client node, a computer program, and a computer program product for handling group
  • group communication means that the same information or media is delivered to multiple client nodes.
  • the client nodes receiving the same media constitute a group of client nodes.
  • These client nodes may be located at different locations in a radio coverage area served by one or more radio access network nodes. If many client nodes are located within the same area, the one or more radio access network nodes could use multicast or broadcast based transmission using e.g., Multicast-Broadcast Multimedia Services (MBMS) for efficient communication to the group of client nodes since communications resources, such as time and frequency resources, are shared among the client nodes.
  • MBMS Multicast-Broadcast Multimedia Services
  • MBMS provides a one-way communication channel, meaning that the data is broadcasted from a radio access network node towards all wireless devices.
  • a wireless device that receives data over an MBMS bearer is moving closer to the border of the radio coverage area served by the radio access network node, the wireless device will request to receive the group
  • a unicast bearer provides means for the wireless device to request link adaptation
  • An object of embodiments herein is to provide efficient handling of group communication for wireless devices.
  • a method for handling group communication is performed by a client node.
  • the client node is hosted by a host wireless device.
  • the method comprises determining that signal quality of broadcast group communication received from a radio access network node is below a signal quality threshold for reliable broadcast communication.
  • the method comprises attempting discovery of a relay wireless device for acting as group communication relay between the radio access network node and the host wireless device.
  • the method comprises initiating, when the relay wireless device is discovered, a connection between the host wireless device and the relay wireless device in order for the relay wireless device to act as relay for the group communication from the radio access network node to the client node.
  • this method provides efficient handling of group
  • packet loss is reduced compared to current methods handling of group communication since the herein presented method triggers the transfer before the wireless device is reaching the cell border.
  • a client node for handling group communication.
  • the client node comprises processing circuitry.
  • the client node is configured to be hosted by a host wireless device.
  • the processing circuitry is configured to cause the client node to determine that signal quality of broadcast group communication received from a radio access network node is below a signal quality threshold for reliable broadcast communication.
  • the processing circuitry is configured to cause the client node to attempt to discover a relay wireless device for acting as group communication relay between the radio access network node and the host wireless device.
  • the processing circuitry is configured to cause the client node to initiate, when the relay wireless device is discovered, a connection between the host wireless device and the relay wireless device in order for the relay wireless device to act as relay for the group communication from the radio access network node to the client node.
  • a client node for handling group communication.
  • the client node comprises processing circuitry and a storage medium.
  • the client node is configured to be hosted by a host wireless device.
  • the storage medium stores instructions that, when executed by the processing circuitry, causes the client node to perform operations, or steps.
  • the operations, or steps, cause the client node to determine that signal quality of broadcast group communication received from a radio access network node is below a signal quality threshold for reliable broadcast communication.
  • the operations, or steps cause the client node to attempt to discover a relay wireless device for acting as group communication relay between the radio access network node and the host wireless device.
  • the operations, or steps cause the client node to initiate, when the relay wireless device is discovered, a connection between the host wireless device and the relay wireless device in order for the relay wireless device to act as relay for the group communication from the radio access network node to the client node.
  • a client node for handling group communication.
  • the client node is configured to be hosted by a host wireless device.
  • the client node comprises a determine module configured to determine that signal quality of broadcast group communication received from a radio access network node is below a signal quality threshold for reliable broadcast communication.
  • the client node comprises a discover module configured to attempt to discover a relay wireless device for acting as group communication relay between the radio access network node and the host wireless device.
  • the client node comprises an initiate module configured to initiate, when the relay wireless device is discovered, a connection between the host wireless device and the relay wireless device in order for the relay wireless device to act as relay for the group communication from the radio access network node to the client node.
  • a computer program for handling group communication comprising computer program code which, when run on a client node hosted by a host wireless device, causes the client node to perform a method according to the first aspect.
  • a computer program product comprising a computer program according to the fifth aspect and a computer readable storage medium on which the computer program is stored.
  • the computer readable storage medium could be a non-transitory computer readable storage medium.
  • any advantage of the first aspect may equally apply to the second, third, fourth, fifth and/or sixth 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.
  • FIG. 1 and 2 are schematic diagram illustrating communications systems according to embodiments
  • FIGS. 3 and 4 are flowcharts of methods according to embodiments
  • Fig. 5 is a signalling diagram according to an embodiment
  • Fig. 6 is a schematic diagram showing functional units of a client node according to an embodiment
  • Fig. 7 is a schematic diagram showing functional modules of a client node according to an embodiment
  • Fig. 8 shows one example of a computer program product comprising computer readable storage medium according to an embodiment.
  • Figs, l and 2 are schematic diagrams illustrating communications systems looa, loob where embodiments presented herein can be applied.
  • the communications systems 100a, 100b are assumed to provide services for group communication and may hence be regarded as group communications systems.
  • the group communications systems 100a, 100b are, according to some aspects, a push to talk (PTT) system.
  • the group communication could thus comprise a push to talk service.
  • the communications systems 100a, 100b comprise a radio access network (as represented by its radio coverage area 120), a core network 140, and a service network 150.
  • the communications systems 100a, 100b further comprises at least one control node 300 and at least one client node 200a, 200b, 200c.
  • Each client node 200a, 200b, 200c could be a mission critical (MC) service client.
  • the at least one control node 300 may be provided in, or installed on, at least one radio access network (RAN) node 110a, 110b or in another entity or device in the radio access network, in an entity or device of the core network 140, or in an entity or device of the service network 150.
  • the at least one control node 300 could implement the functionality of a group
  • Each client node 200a, 200b, 200c may be hosted by, provided in, or installed on, a respective wireless device 160a, 160b, 160c.
  • the radio access network is operatively connected to the core network 140 which in turn is operatively connected to the service network 150.
  • the at least one radio access network node 110a, 110b thereby enables the wireless devices 160a, 160b, 160c, and hence the client nodes 200a, 200b, 200c, to access services and exchange data as provided by the service network 150.
  • wireless devices 160a, 160b, 160c include, but are not limited to, mobile stations, mobile phones, handsets, wireless local loop phones, user equipment (UE), smartphones, laptop computers, and tablet computers.
  • radio access network nodes 110a, 110b include, but are not limited to, radio base stations, base transceiver stations, node Bs, evolved node Bs, and access points. As the skilled person understands, the
  • communications systems 100a, 100b may comprise a plurality of radio access network nodes 110a, 110b (as illustrated by a single radio access network node 110a in Fig. 1 and two radio access network nodes 110a, 110b in Fig. 2), each providing network access to a plurality of wireless devices 160a, 160b, 160c.
  • the herein disclosed embodiments are not limited to any particular number of radio access network nodes 110a, 110b, client nodes 200a, 200b, 200c, or wireless devices 160a, 160b, 160c.
  • Fig. 1 illustrates a single cell MBMS broadcast area
  • Fig. 2 illustrates multiple cells contributing to the same MBMS bearer, typically known as an MBMS signal frequency network (MBSFN). That is, the communications system 100b could be a MBSFN.
  • the radio access network node 110a, 110b could be part of a MBSFN.
  • a broadcast technology such as MBMS.
  • MBMS allows group communication data to be broadcasted while the wireless devices 160a, 160b, 160c are in idle mode, i.e. only listening to the broadcasted data.
  • the area 130, 130' inside the radio coverage area 120 represents the radio coverage area where the wireless devices 160a, 160b, 160c are able to receive broadcasted group communication data as transmitted by the radio access network nodes iioa, nob using (uni-directional) broadcast, such as MBMS.
  • the radio access network nodes iioa, nob using (uni-directional) broadcast such as MBMS.
  • Figs. 1 and 2 further illustrates schematic connections 170, 180, 190 on which group communication is provided from the radio access network node 110a to the wireless device 160a; a direction connection 170 is between the radio access network node 110a and the wireless device 160a, and an indirection connection has a first connection part 180 between the radio access network node 110a and the wireless device 160b, and a second connection part 190 between the wireless device 160b and the wireless device 160a.
  • wireless device 160a listens to broadcast group communication (via connection 170) and moves outside the area 130, 130', as illustrated by arrow 195.
  • the wireless device 160a could therefore use wireless device 160b as Device-To-Network relay for receiving the group communication via the relay wireless device 160b (via connections 180 and 190).
  • wireless device 160b As will be described next, there is currently no service continuity procedure defined for this scenario.
  • Device-to-Network relay This allows a wireless device that is moving outside the radio coverage area to setup a communication path to another wireless device acting as a relay.
  • the relay wireless device must be located in radio coverage of the network and will relay the traffic of the wireless device outside coverage to the network.
  • One application of Device-to-Network relay is specified in 3GPP TS 23.303 V13.4.0 "Proximity-based services (ProSe); Stage 2".
  • ProSe Proximity-based services
  • Stage 2 When MBMS is used in group communication it is possible for the wireless devices that listen to the group communication to stay in idle mode. This means that the wireless device only receives the group communication data and the transmitter of the wireless device could thus be turned off, which saves both battery resources in the wireless device and traffic resources in the communication system.
  • a wireless device that is out of coverage may also receive group communication over an MBMS bearer towards a relay wireless device, and the relay wireless device will forward the data on a device-to- device channel. This can be done in a one-to-one communication path or in a one-to-many communication path.
  • the wireless device that is (potentially) leaving the coverage area could set up a relay connection too late.
  • the wireless device would typically try to establish a connection towards a relay wireless device when the radio signal is becoming weak or is lost, and via that relay connection inform the network about the newly established network connection. Packet loss probability is therefore comparatively high.
  • a wireless device that is at cell border is very costly from a network resources perspective; typically robust coding and intense retransmission is used, which results in high consumption of communication resources. That is, it could be challenging to handle group communication for wireless devices close to coverage area borders.
  • the client node 200a of wireless device 160a (hereinafter denoted host wireless device 160a) receiving broadcast group communication data (such as PTT over an MBMS bearer) triggers a transfer of the connection to another wireless device 160b (hereinafter denoted relay wireless device 160b) when the quality of the MBMS bearer is below a certain threshold.
  • broadcast group communication data such as PTT over an MBMS bearer
  • relay wireless device 160b another wireless device 160b
  • the client node 200a may switch to the relay wireless device 160b before the wireless device 160a loses the network connection completely, which might not be acceptable.
  • a switch to reception of the group communication using a unicast bearer at this stage may be costly from a resource efficiency
  • the wireless device 16 oa that is close to the cell border could be a heavy consumer of network resources.
  • the embodiments disclosed herein particularly relate to mechanisms for handling group communication.
  • a client node 200a a method performed by the client node 200a, a computer program product comprising code, for example in the form of a computer program, that when run on a client node 200a, causes the client node 200a to perform the method.
  • Figs. 3 and 4 are flow charts illustrating embodiments of methods for handling group communication. The methods are performed by the client node 200a. The methods are advantageously provided as computer programs 820.
  • Fig. 3 illustrating a method for handling group communication as performed by the client node 200a according to an embodiment.
  • the client node 200a is hosted by the host wireless device 160a.
  • the client node 200a determines that signal quality of broadcast group communication received from the radio access network node 110a is below a signal quality threshold for reliable broadcast communication.
  • a mechanism to measure the signal quality of broadcast group communication is measurements of Reference Signal Received Quality (RSRQ), for example MBSFN RSRQ as defined in 3GPP TS 36.214 V13.1.0.
  • RSS Reference Signal Received Quality
  • MBSFN RSRQ MBSFN RSRQ as defined in 3GPP TS 36.214 V13.1.0.
  • BLER Transport Block Error Rate
  • the signal quality could, for example, be determined with the Reference Signal Received Quality, RSRQ, or Signal to Interference and Noise Ratio, SINR, for the MBMS bearer.
  • Reliable broadcast communication could be defined by the area 130, 130'. That the signal quality of the broadcast group communication received from the radio access network node 110a is below the signal quality threshold for reliable broadcast communication could thus indicate that the host wireless device 160a is outside the area 130, 130' but still inside the radio coverage area 120 (defining reliable unicast communication).
  • the client node 200a Upon having determined that the signal quality is below the signal quality threshold the client node 200a seeks to find a wireless device 160b to act as a group communication relay. Hence, the client node 200a is configured to perform step S104:
  • the client node 200a attempts discovery of the relay wireless device 160b for acting as group communication relay between the radio access network node 110a and the host wireless device 160a.
  • the client node 200a attempts discovery of the relay wireless device 160b for acting as group communication relay between the radio access network node 110a and the host wireless device 160a prior to the determining in step S102.
  • the client node 200a could be configured to continuously monitor its surroundings in search of a potential relay wireless device 160b for acting as group communication relay between the radio access network node 110a and the host wireless device 160a.
  • the client node 200a is configured to maintain, and periodically update, a list of potential relay wireless devices 160b for acting as group communication relay between the radio access network node 110a and the host wireless device 160a. Due to the above described aspects of the attempting discovery, it is appreciated that steps S102 and S104 can be performed in any order, be performed in parallel, or be performed simultaneously or concurrently.
  • step S104 a relay wireless device 160b is discovered in step S104.
  • the client node 200a therefore initiates establishment of a connection with the relay wireless device 160b.
  • the client node 200a is configured to perform step S106:
  • the client node 200a initiates, when the relay wireless device 160b is discovered, a connection between the host wireless device 160a and the relay wireless device 160b in order for the relay wireless device 160b to act as relay for the group communication from the radio access network node 110a to the client node 200a.
  • the client node 200a could be configured to perform when a relay wireless device 160b is not discovered in step S104 will be disclosed below.
  • a client node 200a of a host wireless device 160a that is leaving the area of MBMS coverage may thus according to steps S102, S104, S106 trigger a discovery procedure to initiate the establishment of a relay communication path to the relay wireless device 160b.
  • the signal quality threshold could be defined as being above a reference threshold given by outage of reception of the broadcast group communication from the radio access network node 110a. In some aspects the signal quality threshold represents a signal quality higher than the signal quality where a unicast connection to the radio access network node 110a is in jeopardy. Embodiments relating to further details of handling group communication as performed by the client node 200a will now be disclosed.
  • the client node 200a could be different ways for the client node 200a to receive the group communication.
  • the group communication is received on an MBMS bearer from the radio access network node 110a, and the signal quality is then determined for the MBMS bearer. That is, according to some embodiments it is assumed that the host wireless device 160a is not using a unicast bearer for receiving the group communication when any of steps S102, S104, S106 are performed.
  • the host wireless device 160a is in idle mode during the determining step S102.
  • the host wireless device 160a could be different ways for the host wireless device 160a to discover the relay wireless device 160b in step S104.
  • the relay wireless device 160b is discovered by the host wireless device 160a using a ProSe (where ProSe is short for Proximity Services) Direct Discovery procedure.
  • ProSe where ProSe is short for Proximity Services
  • a ProSe Direct Discovery procedure is defined in 3GPP TS 23.303 V13.4.0. That is, the relay wireless device 160b could be discovered during a ProSe Direct Discovery procedure over interface PC 5 .
  • connection between the host wireless device 160a and the relay wireless device 160b is a ProSe direct communication as defined in 3GPP TS 23.303 V13.4.0.
  • connection between the host wireless device 160a and the relay wireless device 160b is a WiFi® connection as standardized in IEEE 802.11 (where IEEE is short for Institute of Electrical and Electronics Engineers).
  • connection between the host wireless device 160a and the relay wireless device 160b is a Land Mobile Radio (LMR) device to device connection or a Private Mobile Radio (PMR) device to device connection.
  • LMR Land Mobile Radio
  • PMR Private Mobile Radio
  • Fig. 4 illustrating methods for handling group communication as performed by the client node 200a according to further embodiments. It is assumed that steps S102, S104, S106 are performed as described above with reference to Fig. 3 and a thus repeated description thereof is therefore omitted.
  • the client node 200 could, by means of the host wireless device 160a, inform the relay wireless device 160b about the client node's 200 interested in data sent on a specific group over MBMS.
  • the client node 200a is configured to perform step S108: S108: The client node 200a notifies the relay wireless device 160b to act as relay for the group communication from the radio access network node 110a to the client node 200a.
  • the relay wireless device 160b could then inform the control node 300 of its ability to relay group communication data to the client node 200a.
  • the client node 200a is configured to perform step S110: S110: The client node 200a receives the group communication from the radio access network node 110a on the connection between the host wireless device 160a and the relay wireless device 160b.
  • the client node 200a may still be able to receive the group communication on the MBMS bearer. Hence, according to an embodiment the client node 200a is configured to perform step Sii2a after the initiating step S106:
  • Sii2a The client node 200a maintains reception of the broadcast group communication from the radio access network node 110a.
  • the client node 200a determines to terminate reception of the group communication on the MBMS bearer.
  • the client node 200a is configured to perform step Sii2b after the initiating step S106:
  • Sii2b The client node 200a terminates reception of the broadcast group communication from the radio access network node 110a.
  • the relay wireless device 160b is not discovered in step S104.
  • the client node 200a is configured to perform step S114 in case a relay wireless device 160b is not discovered in step S104:
  • the client node 200a initiates a unicast bearer connection between the host wireless device 160a and the radio access network node 110a to provide group communication from the radio access network node 110a to the client node 200a.
  • the relay wireless device 160b may have respective connections to more than one host wireless device.
  • a relay wireless device 160b acting as a ProSe Device-to-Network Relay may relay evolved MBMS (eMBMS) traffic using a one-to-many ProSe Direct
  • the relay wireless device 160b could act as relay for group communication from the radio access network node 110a to a plurality of client nodes.
  • the relay wireless device 160b could have unicast bearer connection with the radio access network node 110a and have a broadcast bearer connection with the host wireless devices.
  • step S201 The client node 200a estimates the MBMS bearer quality.
  • the client node 200a also measures on reference signals transmitted from a radio access network node of another cell to estimate the possibilities to transfer to unicast and handover to another cell.
  • One way to implement step S201 is to perform step S102.
  • step S202 If the MBMS bearer quality has reach a certain threshold (i.e., is below the signal quality threshold for reliable broadcast communication) the client node 200a performs a ProSe Device-To-Network relay discovery procedure over interface PC5 and establishes a secure point-to-point link with the relay wireless device 160b (denoted UE-R) over interface PC5. As part of the process to establish a ProSe Direct Communication the host wireless device 160a is mutually authenticated at PC5 layer with either the relay wireless device 160b or with the network as specified in 3GPP TS 23.303 V13.4.0 "Proximity-based services (ProSe); Stage 2".
  • One way to implement step S202 is to perform any of steps S104, S106.
  • step S203 Normal service continues for the Device-To-Network connection as disclosed in Annex A of 3GPP TS 23.179 V13.3.0.
  • One way to implement step S203 is to perform step S110.
  • step S204 The client node 200a informs the relay wireless device 160b about the service continuity needs for the media that it is receiving over the MBMS bearer by sending a request for reception of media over MBMS bearer.
  • One way to implement step S204 is to perform step S108.
  • the relay wireless device 160b will request the group communication service for the client node 200a to be transferred over an MBMS bearer to the relay wireless device 160b on behalf of the client node 200a by sending a message with request for MC service over the MBMS bearer on behalf of the MC service client (i.e., on behalf of client node 200a).
  • the wireless device 160a thereafter uses wireless device 160b as Device-To- Network relay for receiving the group communication via the relay wireless device 160b (via connections 180 and 190).
  • Fig. 6 schematically illustrates, in terms of a number of functional units, the components of a client node 200a according to an embodiment.
  • Processing circuitry 210 is provided using any combination of one or more of a suitable central processing unit (CPU), multiprocessor, microcontroller, digital signal processor (DSP), etc., capable of executing software instructions stored in a computer program product 810 (as in Fig. 8), e.g. in the form of a storage medium 230.
  • the processing circuitry 210 may further be provided as at least one application specific integrated circuit (ASIC), or field programmable gate array (FPGA).
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • the processing circuitry 210 is configured to cause the client node 200a to perform a set of operations, or steps, S102-S114, S201-S204, as disclosed above.
  • the storage medium 230 may store the set of operations
  • the processing circuitry 210 may be configured to retrieve the set of operations from the storage medium 230 to cause the client node 200a to perform the set of operations.
  • the set of operations may be provided as a set of executable instructions.
  • the processing circuitry 210 is thereby arranged to execute methods as herein disclosed.
  • the storage medium 230 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 client node 200a may further comprise a
  • the communications interface 220 at least configured for communications with the host wireless device 160a, the relay wireless device 16b (or its hosted client node 200b) and the control node 300.
  • the communications interface 220 may comprise one or more transmitters and receivers, comprising analogue and digital components.
  • the processing circuitry 210 controls the general operation of the client node 200a e.g. by sending data and control signals to the communications interface 220 and the storage medium 230, by receiving data and reports from the communications interface 220, and by retrieving data and instructions from the storage medium 230.
  • Other components, as well as the related functionality, of the client node 200a are omitted in order not to obscure the concepts presented herein.
  • Fig. 7 schematically illustrates, in terms of a number of functional modules, the components of a client node 200a according to an embodiment.
  • the client node 200a of Fig. 7 comprises a number of functional modules; a l8 determine module 210a configured to perform step S102, a discover module 210b configured to perform step S104, and an initiate module 210c configured to perform step S106.
  • the client node 200a of Fig. 7 schematically illustrates, in terms of a number of functional modules, the components of a client node 200a according to an embodiment.
  • the client node 200a of Fig. 7 comprises a number of functional modules; a l8 determine module 210a configured to perform step S102, a discover module 210b configured to perform step S104, and an initiate module 210c configured to perform step S106.
  • 7 may further comprises a number of optional functional modules, such as any of a notify module 2iod configured to perform step S108, a receive module 2ioe configured to perform step S110, a maintain module 2iof configured to perform step Sii2a, a terminate module 2iog configured to perform step Sii2b, and an initiate module 2ioh configured to perform step S114.
  • a notify module 2iod configured to perform step S108
  • a receive module 2ioe configured to perform step S110
  • a maintain module 2iof configured to perform step Sii2a
  • a terminate module 2iog configured to perform step Sii2b
  • an initiate module 2ioh configured to perform step S114.
  • each functional module 2ioa-2ioh may in one embodiment be implemented only in hardware or and in another embodiment with the help of software, i.e., the latter embodiment having computer program instructions stored on the storage medium 230 which when run on the processing circuitry makes the client node 200a perform the corresponding steps mentioned above in conjunction with Fig 7.
  • the modules correspond to parts of a computer program, they do not need to be separate modules therein, but the way in which they are implemented in software is dependent on the programming language used.
  • one or more or all functional modules 2ioa-2ioh may be implemented by the processing circuitry 210, possibly in cooperation with functional units 220 and/or 230.
  • the processing circuitry 210 may thus be configured to from the storage medium 230 fetch instructions as provided by a functional module 2ioa-2ioh and to execute these instructions, thereby performing any steps as disclosed herein.
  • the client node 200a may be provided as a standalone device or as a part of at least one further device.
  • the client node 200a may be hosted by, provided in, or installed on a wireless device 160a
  • Fig. 8 shows one example of a computer program product 810 comprising computer readable storage medium 830.
  • a computer program 820 can be stored, which computer program 820 can cause the processing circuitry 210 and thereto operatively coupled entities and devices, such as the communications interface 220 and the storage medium 230, to execute methods according to embodiments described herein.
  • the computer program 820 and/or computer program product 810 may thus provide means for performing any steps as herein disclosed.
  • the computer program product 810 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 810 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 or a Flash memory, such as a compact Flash memory.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • the computer program 820 is here schematically shown as a track on the depicted optical disk, the computer program 820 can be stored in any way which is suitable for the computer program product 810.

Landscapes

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

Abstract

L'invention concerne des mécanismes de gestion de communication de groupe. Un procédé est réalisé par un nœud client. Le nœud client est hébergé par un dispositif sans fil hôte. Le procédé consiste à déterminer que la qualité de signal d'une communication de groupe de diffusion reçue en provenance d'un nœud de réseau d'accès radio est inférieure à un seuil de qualité de signal pour une communication de diffusion fiable. Le procédé comprend la tentative de découverte d'un dispositif sans fil relais pour agir en tant que relais de communication de groupe entre le nœud de réseau d'accès radio et le dispositif sans fil hôte. Le procédé consiste à établir, lorsque le dispositif sans fil relais est découvert, une liaison entre le dispositif sans fil hôte et le dispositif sans fil de relais afin que le dispositif sans fil relais agisse comme relais pour la communication de groupe depuis le nœud de réseau d'accès radio vers le nœud de client.
PCT/EP2016/073373 2016-09-29 2016-09-29 Communication de groupe au niveau de bordures de zone de couverture Ceased WO2018059703A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/073373 WO2018059703A1 (fr) 2016-09-29 2016-09-29 Communication de groupe au niveau de bordures de zone de couverture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/073373 WO2018059703A1 (fr) 2016-09-29 2016-09-29 Communication de groupe au niveau de bordures de zone de couverture

Publications (1)

Publication Number Publication Date
WO2018059703A1 true WO2018059703A1 (fr) 2018-04-05

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Country Status (1)

Country Link
WO (1) WO2018059703A1 (fr)

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Functional architecture and information flows to support mission critical communication services; Stage 2 (Release 13)", 3GPP STANDARD; 3GPP TS 23.179, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. SA WG6, no. V13.3.0, 26 September 2016 (2016-09-26), pages 1 - 228, XP051172555 *
"3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on extended architecture support for proximity-based services (Release 13)", 4 March 2015 (2015-03-04), XP050961131, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_sa/WG2_Arch/Latest_SA2_Specs/Latest_draft_S2_Specs/> [retrieved on 20150304] *
ZTE ET AL: "Discussion on Remote UE's Relay discovery, selection and reselection", vol. RAN WG2, no. Beijing, China; 20150824 - 20150828, 23 August 2015 (2015-08-23), XP051004412, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN2/Docs/> [retrieved on 20150823] *

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