WO2017194089A1 - Détermination de la transmission d'un service mbms - Google Patents

Détermination de la transmission d'un service mbms Download PDF

Info

Publication number
WO2017194089A1
WO2017194089A1 PCT/EP2016/060323 EP2016060323W WO2017194089A1 WO 2017194089 A1 WO2017194089 A1 WO 2017194089A1 EP 2016060323 W EP2016060323 W EP 2016060323W WO 2017194089 A1 WO2017194089 A1 WO 2017194089A1
Authority
WO
WIPO (PCT)
Prior art keywords
service list
mbms
network node
cell
supporting
Prior art date
Application number
PCT/EP2016/060323
Other languages
English (en)
Inventor
Hawkins XU
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
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to PCT/EP2016/060323 priority Critical patent/WO2017194089A1/fr
Publication of WO2017194089A1 publication Critical patent/WO2017194089A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • 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
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS

Definitions

  • the invention relates to a method, network nodes, a computer program and a computer program product for determining Multimedia Broadcast Multicast Service, MBMS, service transmission in an MBMS Single Frequency
  • MBSFN Mobility Network
  • point-to- multipoint systems such as broadcasting and/or multicasting can be used.
  • network resources are shared between receiving wireless devices to a higher degree.
  • a set of related standards for point-to-multipoint content delivery using cellular communication systems is 3GPP MBMS (3rd
  • 3GPP eMBMS evolved MBMS
  • MBSFN MBMS Single Frequency Network
  • An MBSFN area comprises multiple cells in which transmission of the same waveforms is performed at the same time.
  • a property of MBSFN transmission is that all participating cells transmit the same content in a synchronized manner so it appears as one transmission to the wireless device. This gives the possibility for wireless devices to combine MBMS transmissions from multiple cells. Transmitting the same data to multiple wireless devices allows network resources to be shared.
  • the method is performed in one of a plurality of network nodes, the network node being associated with at least one cell identifier.
  • the method comprises the step of: receiving an MBMS session event.
  • the method comprises the steps of: obtaining a cell identifier list for each one of a plurality of MBMS services; generating a direct active service list containing any MBMS services having a cell identifier list containing the cell identifier associated with the network node; generating an indirect active service list containing any MBMS services not forming part of the direct active service list, but having a cell identifier list containing a cell identifier of an MBMS service forming part of the direct active service list; forming an active service list containing the items of the direct active service list and the indirect active service list; and transmitting MBMS service data for any MBMS services of the active service list.
  • the step of generating an indirect active service list may comprise also including in the indirect active service list any MBMS services being in a chain of overlaps with the network node, chained over MBMS services sharing at least one cell id.
  • the method may further comprise the steps of: generating, for each cell neighbouring the cell of the network node, a direct supporting service list containing any MBMS services not forming part of the active service list, but having a cell identifier list containing the cell identifier of a cell neighbouring a cell of the network node; generating, for each cell neighbouring the cell of the network node, an indirect supporting service list containing any MBMS services not forming part of the active service list nor the direct supporting service list, but having a cell identifier list containing a cell identifier of an MBMS service forming part of the active service list of the neighbour cell; forming a supporting service list containing the items of the direct supporting service list and the indirect supporting service list; and performing a supporting function for any MBMS services of
  • the step of performing a supporting function may comprise configuring the network node to mute transmissions on radio resources assigned to the MBMS services of the supporting service list.
  • the step of transmitting MBMS service data may comprise transmitting service announcement data for any MBMS services of the active service list only when the supporting service list is empty or only contains items forming part of the active service list.
  • the method may further comprise the steps of: determining whether there is a conflict by determining whether the supporting service list for two neighbour cells differ in their respective supporting service list; muting transmissions on radio resources assigned to the MBMS services of the supporting service lists of all neighbours. In such a case, the step of performing a supporting function is only performed when there is no conflict in the supporting service lists.
  • a network node for determining Multimedia Broadcast Multicast Service, MBMS, service transmission in an MBMS Single Frequency Network, MBSFN, the network node, when in operation, being associated with at least one cell identifier, and the network node being configured to be one of a plurality of network nodes.
  • the network node comprises: a processor; and a memory storing instructions that, when executed by the processor, causes the network node to: receive an MBMS session event; and, for each cell of the network node: obtain a cell identifier list for each one of a plurality of MBMS services; generate a direct active service list containing any MBMS services having a cell identifier list containing the cell identifier associated with the network node; generate an indirect active service list containing any MBMS services not forming part of the direct active service list, but having a cell identifier list containing a cell identifier of an MBMS service forming part of the direct active service list; form an active service list containing the items of the direct active service list and the indirect active service list; and transmit MBMS service data for any MBMS services of the active service list.
  • the instructions to generate an indirect active service list may comprise instructions that, when executed by the processor, causes the network node to also include in the indirect active service list any MBMS services being in a chain of overlaps with the network node, chained over MBMS services sharing at least one cell id.
  • the network node may further comprise instructions that, when executed by the processor, causes the network node to: generate, for each cell
  • a direct supporting service list containing any MBMS services not forming part of the active service list, but having a cell identifier list containing the cell identifier of a cell neighbouring a cell of the network node; generate, for each cell neighbouring the cell of the network node, an indirect supporting service list containing any MBMS services not forming part of the active service list nor the direct supporting service list, but having a cell identifier list containing a cell identifier of an MBMS service forming part of the active service list of the neighbour cell; form a supporting service list containing the items of the direct supporting service list and the indirect supporting service list; and perform a supporting function for any MBMS services of the supporting service list when the active service list is empty and there is at least one item in the supporting service list.
  • the instructions to perform a supporting function may comprise instructions that, when executed by the processor, causes the network node to configuring the network node to act as an active supporting cell, comprising transmitting MBMS service data for which the supporting function is applied.
  • the instructions to perform a supporting function may comprise instructions that, when executed by the processor, causes the network node to configure the network node to mute transmissions on radio resources assigned to the MBMS services of the supporting service list.
  • the instructions to transmit MBMS service data may comprise instructions that, when executed by the processor, causes the network node to transmit service announcement data for any MBMS services of the active service list only when the supporting service list is empty or only contains items forming part of the active service list.
  • the network node may further comprise instructions that, when executed by the processor, causes the network node to: determine whether there the supporting service list for two neighbour cells differ sis a conflict in the supporting service list; mute transmissions on radio resources assigned to the MBMS services of the support service lists of all neighbours; and only execute the instructions to perform a supporting function when there is no conflict in the supporting service list.
  • a network node comprising: means for receiving a Multimedia Broadcast Multicast Service, MBMS, session event in an MBMS Single Frequency Network, MBSFN; means for, for each cell of the network node, the network node being associated with at least one cell identifier, obtaining a cell identifier list for each one of a plurality of MBMS services; means for, for each cell of the network node, generating a direct active service list containing any MBMS services having a cell identifier list containing the cell identifier associated with the network node; means for, for each cell of the network node, generating an indirect active service list containing any MBMS services not forming part of the direct active service list, but having a cell identifier list containing a cell identifier of an MBMS service forming part of the direct active service list; means for, for each cell of the network node, forming an active service list containing the items of the direct active service list and the indirect active service list
  • a computer program for determining Multimedia Broadcast Multicast Service, MBMS, service transmission in an MBMS Single Frequency Network, MBSFN comprises computer program code which, when run on the network node, being one of a plurality of network nodes, the network node being associated with at least one cell identifier, causes the network node to: receive an MBMS session event; and, for each cell of the network node: obtain a cell identifier list for each one of a plurality of MBMS services; generate a direct active service list containing any MBMS services having a cell identifier list containing the cell identifier associated with the network node; generate an indirect active service list containing any MBMS services not forming part of the direct active service list, but having a cell identifier list containing a cell identifier of an MBMS service forming part of the direct active service list; form an active service list containing the items of the direct active service list and the indirect active service list; and transmit
  • Network node is to be construed as a node in a cellular network.
  • the network node can e.g. be a radio base station and can have one or more radio cells.
  • Wireless device is to be construed as a user device which can be portable or fixed and can communicate over a wireless interface to a mobile
  • the communication network Can e.g. be a mobile phone, smart phone or a tablet/laptop with wireless connectivity.
  • the wireless device can also be referred to as User Equipment.
  • MBMS service is to be construed as a media service intended to be received by wireless devices, e.g. a video service, audio service or a combination of both.
  • MBMS service data is to be construed as user data of an MBMS service, e.g. video data and/or audio data.
  • MBMS single frequency network is to be construed as an MBSFN area comprising multiple cells in which transmission of the same MBMS service data is performed over the same radio resources.
  • MBMS session event is to be construed as an event relating to a change of an MBMS service, e.g. start, update, stop of the MBMS service.
  • Cell identifier is to be construed as an identifier of a radio cell belonging to a network node.
  • Service announcement data is to be construed as data transmitted in a cell announcing to UEs which MBMS services that are transmitted in the cell.
  • 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 l is a schematic diagram illustrating an environment with distributed MCEs in which embodiments presented herein can be applied;
  • Fig 2 is a schematic diagram illustrating how MBMS services from different cells affect wireless devices
  • Fig 3 is a schematic diagram illustrating available radio resources for MBMS services in the environment of Fig l;
  • Figs 4A-B are schematic diagrams illustrating two different subframe allocations in the structure of Fig 3 which can be applied in the environment of Fig 1;
  • Figs 5A-B are flow charts illustrating methods for determining MBMS service transmission in an MBSFN according to various embodiments;
  • Figs 6-9 are schematic diagrams showing MBMS service allocations across cells e.g. in the environment equivalent to that shown in Fig 1, in various scenarios;
  • Fig 10 is a schematic diagram illustrating components of any of the network nodes of Figs 1 or 2;
  • Fig 11 is a schematic diagram illustrating functional modules of any of the network nodes of Figs l or 2; and
  • Fig 12 shows one example of a computer program product comprising computer readable means.
  • Embodiments presented herein relate to an improved determination of MBMS service transmission in an MBSFN.
  • an active service list is generated, for each cell in question, which comprises not only MBMS services allocated to the cell in question, but also MBMS services which overlap in at least one other cell with an MBMS service allocated to the cell in question.
  • the allocations of MBMS services are consistent in the set of cells, which eliminates any inconsistencies of MBMS service resource allocation between cells within the set of cells, thus reducing or even eliminating any
  • a wireless communication network 300 comprises one or more network nodes I05a-b, here each in the form of a radio base station such as an evolved Node B, also known as an eNode B or eNB.
  • Each one of the network nodes I05a-b could also be in the form of a Node B, BTS (Base Transceiver Station) and/or BSS (Base Station Subsystem), etc., as long as the embodiments presented herein are applicable.
  • the network nodes losa-b provide radio connectivity to one or more wireless devices 2.
  • the wireless device 2 shown here is capable of receiving a broadcast and/or a multicast content feed.
  • the term wireless device is also known as mobile communication terminal, user equipment, mobile terminal, user terminal, user agent, machine-to-machine device etc., and can be, for example, what today are commonly known as a mobile phone, smart phone or a tablet/laptop with wireless connectivity or a fixed mounted terminal.
  • the wireless communication network 300 may e.g. comply with any one or a combination of LTE-SAE (Long Term Evolution - System Architecture Evolution), W-CDMA (Wideband Code Division Multiplex), EDGE
  • GSM Global System for Mobile communication
  • GPRS General Packet Radio Service
  • CDMA2000 Code Division Multiple Access 2000
  • the wireless communication network 300 further comprises components to support broadcast content, in a broadcast or a multicast way, i.e. multiple wireless devices 2 can receive the same content in a point-to-multipoint fashion. This increases network efficiency, e.g. compared to point-to-point streaming, also known as unicast.
  • the components for broadcast comply with any suitable standard, e.g. 3GPP MBMS (3 rd Generation Partnership Project Multimedia Broadcast Multicast Service), 3 GPP MBMS Evolution, 3GPP 1MB (Integrated Mobile Broadcast), 3 GPP eMBMS (Evolved MBMS), DVB-H (Digital Video Broadcasting - Handheld), DVB-NGH (Digital Video Broadcasting - Next Generation Handheld), or any other current or future broadcast system over wireless networks, as long as the principles described hereinafter are applicable.
  • 3GPP MBMS 3 rd Generation Partnership Project Multimedia Broadcast Multicast Service
  • 3 GPP MBMS Evolution 3GPP 1MB (Integrated Mobile Broadcast)
  • 3 GPP eMBMS Evolution
  • DVB-H Digital Video Broadcasting - Handheld
  • DVB-NGH Digital Video Broadcasting - Next Generation Handheld
  • a Broadcast Multicast Service Center (BM-SC) 101 is provided to control the general flow of content from content providers 113 to the wireless devices 2, including providing both content and metadata at appropriate points in time.
  • BM-SC Broadcast Multicast Service Center
  • An MBMS-GW 110 connects the BM-SC 101 with the wireless communication network 300 and network nodes I05a-b. Moreover, the MBMS-GW 110 is responsible for session management, etc.
  • a Mobility Management Entity (MME) 107 is a control node for the wireless telecommunications network 300.
  • An MBMS Gateway (MBMS GW) 110 is an entity that is provided between the BM-SC 101 and network nodes losa-b.
  • the function of the MBMS GW is to send/broadcast of MBMS packets to each one of the network nodes I05a-b transmitting the service.
  • the MBMS GW 110 performs MBMS Session Control Signaling towards the radio access network, such as E-UTRAN (Evolved Universal Terrestrial Radio Access Network), via the MME 107.
  • An MBMS session corresponds to an MBMS service, i.e. one media transmission.
  • An MCE function is distributed to the network nodes I05a-b in distributed MCEs 103.
  • the functions of the distributed MCEs 103 are admission control and the allocation of radio resources used by all network nodes losa-b in the MBSFN network.
  • the distributed MCEs 103 form part of the respective network nodes I05a-b, using software and/or hardware components of the network nodes I05a-b.
  • An M3 interface 115 is provided between the MME 107 and each one of the network nodes losa-b housing the distributed MCEs 103.
  • the allocation of available radio resources for the radio transmission can be configured by another configuration node, such as by an Operation Support Systems (OSS) node. It is then up to each of the network nodes I05a-b in the same MBSFN area to transmit the allocation of radio resources to wireless devices.
  • OSS Operation Support Systems
  • One advantage of the distributed MCEs 103, compared to a standalone MCE (not shown) is that no extra node (the MCE) is required to coordinate the corresponding network nodes, simplifying network architecture and reducing deployment cost compared to the stand-alone MCE.
  • An interface 117 between the MBMS GW 110 and the network nodes I05a-b is called Mi, and is a user plane interface, as indicated by the solid line.
  • IP multicast or broadcast is used for point-to-multipoint delivery of user packets from the MBMS GW 110 to the network nodes losa-b.
  • the point to multipoint delivery of content is an efficient way to deliver the same content to large number of wireless devices in terms of frequency spectrum usage.
  • this can be based on single frequency network (SFN) technology.
  • SFN single frequency network
  • the wireless telecommunications network 300 comprises the first network node 105a serving a first cell Ci and the second network node 105b serving a second cell C2.
  • Each one of the first network node 105a and the second network node 105b is of the type shown in Fig 2, i.e. comprising distributed MCE functionality.
  • a first wireless device 2a is located in an overlapping area of the two cells Ci, C2 while a second wireless device 2b is located in the second cell C2.
  • the first wireless device 2a receives synchronised MBMS service transmissions from both the first network node 105a and the second network node 105b, thereby increasing received signal strength.
  • the first wireless device will receive conflicting signals on some radio resources. As is explained in more detail below, the risk for such conflicts is reduced by careful selection of what MBMS services each cell will transmit.
  • Fig 3 is a schematic diagram illustrating available radio resources for MBMS services in the environment of Fig 1.
  • Each column represents one radio frame 150, divided in 10 subframes (in this example).
  • Sixteen radio frames 150 make up one CSP (Common sub-frames allocation Period, a.k.a. commonSF- AllocPeriod) 152.
  • a certain bandwidth for an MBMS service thus corresponds to a certain number of subframes in the CSP 152, when applying a Modulation and Coding Scheme (MCS) which is associated with the MBMS service.
  • MCS Modulation and Coding Scheme
  • the rightward slanting dashed subframes are blacklist subframes 160, which are not to be available for eMBMS according to 3GPP.
  • the dotted subframes are whitelist subframes 162 which are potential subframes for the MBSFN, as preconfigured.
  • Fig 3 thus illustrates the maximum number of frames that are available for the MBSFN.
  • Figs 4A-B are schematic diagrams illustrating two different subframe allocations in the structure of Fig 3 which can be applied in the environment of Fig 1. Looking first to Fig 4A, the subframes which were allocated as white list subframes 162 in Fig 3 are now used for three different MBMS services. Subframes used for a first MBMS service are indicated with vertically striped subframes 171. Subframes used for a second MBMS service are indicated with cross striped subframes 172. Subframes used for a third MBMS service are indicated with densely dotted subframes 173.
  • the allocation of subframes differ. For instance, looking now to Fig 4B, compared to the scenario of Fig 4A, the first MBMS service is here omitted. This results in the remaining MBMS services being moved forward, so that the second MBMS service is allocated from the first available subframe. This results in some free subframes being available in radio frame 13.
  • the first wireless device 2a of Fig 2 if the structure of Fig 4A is transmitted by the first network node 105a and the structure of Fig 4B is transmitted by the second network node 105b, there are conflicts where different MBMS services are transmitted in different subframes. Moreover, the MBMS services which are common are shifted in relation to each other, whereby no subframes for MBMS services of the structure of Fig 4A contain the same data as the structure of Fig 4B.
  • Figs 5A-B are flow charts illustrating methods for determining MBMS service transmission in an MBSFN according to various embodiments.
  • the method is performed in one of a plurality of network nodes of the system of Fig 1 and the network node is associated with at least one cell identifier.
  • Embodiments of methods can be performed for each cell in the network and will yield the same result. In other words, using this method, a logical and predictable outcome is achieved for each cell without any need communicating results of the method between cells.
  • a receive MBMS event step 40 an MBMS session event is received.
  • the MBMS session event is an event relating to a change of an MBMS service, e.g. start, update, stop of the MBMS service.
  • the remaining steps are performed separately for each one of the cells of the network node.
  • a cell identifier list is obtained for each one of a plurality of MBMS services.
  • a generate direct active service list step 42 a direct active service list is generated, containing any MBMS services having a cell identifier list containing the cell identifier associated with the network node.
  • an indirect active service list is generated, containing any MBMS services not forming part of the direct active service list, but having a cell identifier list containing a cell identifier of an MBMS service forming part of the direct active service list.
  • the indirect active service list contains MBMS services with at least one overlapping cell (using the cell identifier lists of the MBMS services) of the direct active service list. This can comprise also including in the indirect active service list any MBMS services being in a chain of overlaps with the network node, chained over MBMS services sharing at least one cell id. For instance, consider the following example: MBMS service A has a cell identifier list of cells Ci, C2 and C3.
  • MBMS service B has a cell identifier list of cells C3 and C4.
  • MBMS service C has a cell identifier list of cells C4, C5 and C6.
  • MBMS service A is a direct active service
  • MBMS service B is an indirect active service (overlapping in cell C3 with the direct active service MBMS service A)
  • MBMS service C is an indirect active service (chained to Ci via MBMS service B).
  • aform active service list step 46 an active service list is formed containing the items of the direct active service list and the indirect active service list.
  • MBMS service data is transmitted for any MBMS services of the active service list.
  • Fig 5B only steps which are new or amended compared to Fig 5A will be described.
  • an optional addition of supporting service list is used, to further improve transmissions in relation to neighbouring cells.
  • the network node In an optional generate direct supporting service list step 50, the network node generates, for each cell neighbouring the cell of the network node, a direct supporting service list.
  • the direct supporting service list contains any MBMS services not forming part of the active service list, but having a cell identifier list containing the cell identifier of a cell neighbouring a cell of the network node.
  • the network node In an optional generate indirect supporting service list 52, the network node generates, for each cell neighbouring the cell of the network node, an indirect supporting service list.
  • the indirect supporting service list contains any MBMS services not forming part of the active service list nor the direct supporting service list, but having a cell identifier list containing a cell identifier of an MBMS service forming part of the active service list of the neighbour cell.
  • the indirect supporting service list contains the items of the indirect active service list of the neighbour cell in question.
  • a supporting service list is formed, containing the items of the direct supporting service list and the indirect supporting service list. This supporting service list is formed for each neighbouring cell.
  • a total supporting service list is formed containing the items of all supporting service lists.
  • the network node determines whether there are any items in the active service list. If this is the case, the method proceeds to an optional conditional support service list empty or subset of active service list step 47. Otherwise, the method proceeds to an optional conditional any item in supporting service list step 53 ⁇
  • the network node determines whether the all support service lists (or the total support service list) are empty or the support service lists are true subsets of the active service list. If this is the case, the method proceeds to the transmit MBMS data step 48. Otherwise, the method proceeds to an optional perform supporting function step 56.
  • the network node determines whether there are any items in any of the supporting service lists for the cell. If this is the case, the method proceeds to an optional conditional conflict step 55. Otherwise, the method ends.
  • the network node determines whether there is a conflict by determining whether there are any supporting service lists for two neighbour cells differ in their respective supporting service lists. If there is a conflict, the method proceeds to an optional mute step 58. Otherwise, the method proceeds to an optional perform supporting function step 56.
  • transmissions are muted on radio resources assigned to the MBMS services of the supporting service lists of all
  • Steps 55 and 58 are optional from the rest of the method of Fig 5B and can be performed to further improve handling of scenarios with many different supporting service lists for different neighbours.
  • the optional perform supporting function step 56 a supporting function is performed in the cell.
  • This step can comprise configuring the network node to act as an active supporting cell, comprising transmitting MBMS service data for which the supporting function is applied.
  • This allows wireless devices to receive the MBMS signal from another source, providing an improved signal to noise (and interference) ratio, whereby reception of MBMS services in the neighbouring cell is improved.
  • This step can comprise configuring the network node to mute transmissions on radio resources assigned to the MBMS services of the supporting service list. This prevents wireless devices to receive interference from the cell in question when receiving the MBMS signal, providing an improved signal to noise and interference ratio, whereby reception of MBMS services in the neighbouring cell is improved.
  • the transmit MBMS data step 48 step comprises transmitting service announcement data for any MBMS services of the active service list only when the supporting service list is empty or only contains items forming part of the active service list.
  • Figs 6-9 are schematic diagrams showing MBMS service allocations across cells e.g. in the environment equivalent to that shown in Fig 1, in various scenarios. These will now be described, one by one, with reference to the methods of Figs 5A-B.
  • Each cell is referred to as the character 'C and a reference number.
  • C12 refers to a cell number 12
  • C9 refers to a cell number 9.
  • a first MBMS service has a cell identifier list containing cells C1-C8.
  • cells Ci-C8 are commanded to transmit the first MBMS service.
  • a second MBMS service has a cell identifier list containing cells C5-C8. If the services do not align in the radio resources, e.g. as described above with reference to Figs 4 A and 4B, there is a conflict where these two areas meet, specifically between cells C3-C4 on one side and cells C5-C6 on the other side.
  • each cell generates an indirect active service list.
  • the active indirect service list comprises the second MBMS service, since the second MBMS service has a cell identifier list which contains a cell also forming part of the direct active service list.
  • all of cells C1-C8 then transmit both the first MBMS service and the second MBMS service, whereby the conflicting use of radio resources between cells C3-C4 and C5-C6 is avoided.
  • the direct supporting service list in step 50 contains the direct active services of neighbouring cells, i.e. both the first MBMS service and the second MBMS service.
  • Cells C14-C15 and C28-C31 are not neighbours to cells C5-C8 but to cells Ci- C4. These cells determine in step 50 that the first MBMS service forms part of the direct supporting service list in steps 50. In step 52, the second MBMS service is determined to form part of the indirect supporting service list.
  • the supporting service list formed in step 54, contains both the first MBMS service and the second MBMS service.
  • the first set of cells C9, C10, C12 and C23-C27 and the second set of cells C14-C15 and C28-C31 will all perform a supporting function in step 56, e.g. by actively transmitting the MBMS services of the supporting service list or muting its radio resources assigned to the MBMS services of the supporting service list.
  • MBSFNs MBSFNs.
  • the transmission occurs according to the following:
  • a first MBMS service Si is broadcasted in cells Ci, C2, C3, C4 in a first MBSFN.
  • a second MBMS service S2 is broadcasted in cells C5, C6, C7, C8 in a second MBSFN.
  • a third MBMS service S3 is broadcasted in cells C12, C13, C14, C15, C16 in a third MBSFN.
  • a fourth MBMS service S4 is broadcasted in cells C9, Cio, C11 using the first MBSFN.
  • cells C5, C6, C27, C28, C29, C30, C31, C32, C14, C12 each performs a supporting function in step 56 for MBSFNi with the first MBMS service.
  • Cells C7, C16, C15, C18, C19, C20, C21, C22, C23 each performs a supporting function in step 56 for MBSFNi, but here for the fourth MBMS service.
  • Cells C3, C4, C27, C26, C25, C24, C23, C9, C16, C12 each performs a supporting function in step 56 for MBSFN2 with the second MBMS service.
  • Cells Ci, C3, C5, C7, C9, Cio, C18, C17, C34, C33, C32 each performs a supporting function in step 56 for MBSFN3 with the third MBMS service.
  • the broadcasting application covers the whole targeted area with four small MBSFN broadcast areas with three pre-configured MBSFN resources based on the actual broadcast coverage needs in that specific moment, i.e. MBSFNi resources are re-used in two isolated areas.
  • MBSFNi resources are re-used in two isolated areas.
  • Fig 9 this illustrates when there is a conflict. In this scenario, there is one MBSFN.
  • a first MBMS service Si has cell identifier list
  • a second MBMS service S2 has cell identifier list containing C2, C3 and C4.
  • a third MBMS service S3 has cell identifier list containing C5, C6 and C7.
  • a fourth MBMS service S4 has cell identifier list containing C11, C12 and C13.
  • a fifth MBMS service S5 has cell identifier list containing C8, C9 and Cio.
  • cell Ci has one direct active service in Si.
  • Cell Ci also has an indirect active service in S2 (overlapping with Si in C2, C3 and C4).
  • Direct supporting services are S5, due to cell C10, S2 due to cell C2 and S2 due to cell C3. There are no indirect supporting services for cell Ci.
  • Cell 10 has one direct active service in S5.
  • Cell C10 has no indirect active services (no cells have both S5 and another MBMS service).
  • Direct supporting service is Si, due to cell Ci.
  • Indirect supporting service is S2 due to cell Ci.
  • Cell C14 has no direct active service and thus no indirect active service.
  • Direct supporting services are S3 due to cell C5 and S4 dues to cell C11. There are no indirect supporting services for cell C14.
  • cell C14 has different supporting services for neighbouring cell C5 and neighbouring cell C11. This situation is detected in step 55 and step 58 will be performed. Hence cell C14 mutes the corresponding subframes which are occupied by S3 or S4 as if they are broadcasted alone in the pre-configured MBSFN. This is an error handling scenario, and wireless devices will have worse coverage at the cell border between cells C5 and C14, and between cells C11 and C14.
  • step 45 the method proceeds from step 45 to step 47, since cell C10 has an active service. From step 47, the method proceeds to step 56, since the support service list is not empty, nor a subset of the active service list.
  • step 56 cell Cio performs a supporting function for the active service(s), in this case S5. Analogously, cell Cio performs a supporting function for its active service(s), i.e. Si and S2.
  • FIG 10 is a schematic diagram illustrating components of any of the network nodes losa-b, of Figs 1 or 2, here represented by a single network node 105.
  • a processor 60 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 etc., capable of executing software instructions 67 stored in a memory 64, which can thus be a computer program product.
  • the processor 60 can be configured to execute the method described with reference to Figs 5A-B above.
  • the memory 64 can be any combination of read and write memory (RAM) and read only memory (ROM).
  • the memory 64 also comprises 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.
  • a data memory 66 is also provided for reading and/or storing data during execution of software instructions in the processor 60.
  • the data memory 66 can be any combination of read and write memory (RAM) and read only memory (ROM).
  • the network node 105 further comprises an I/O interface 62 for
  • the I/O interface 62 also includes a user interface.
  • a transceiver 61 comprises suitable analogue and digital components to allow signal transmission and signal reception with a wireless device using one or more antennas 63.
  • network node 105 Other components of the network node 105 are omitted in order not to obscure the concepts presented herein.
  • Fig 11 is a schematic diagram illustrating functional modules of any of the network nodes of Figs 1 or 2.
  • the modules are implemented using software instructions such as a computer program executing in the network node 105.
  • the modules correspond to the steps in the methods illustrated in Figs 5A-B.
  • a receiver 70 corresponds to step 40.
  • An obtainer 71 corresponds to step 41, a generator corresponds to steps 42, 44, 50 and 52.
  • a former 76 corresponds to steps 46 and 54.
  • a list determiner 75 corresponds to steps 45, 47 and 53.
  • a transmitter 78 corresponds to step 48.
  • a supporter 79 corresponds to step 56.
  • a conflict determiner 80 corresponds to step 55.
  • Fig 12 shows one example of a computer program product comprising computer readable means.
  • a computer program 91 can be stored, which computer program can cause a processor to execute a method according to embodiments described herein.
  • the computer program product is an optical disc, such as a CD (compact disc) or a DVD (digital versatile disc) or a Blu-Ray disc.
  • the computer program product could also be embodied in a memory of a device, such as the computer program product 64 of Fig 10. While the computer program 91 is here schematically shown as a track on the depicted optical disk, the computer program can be stored in any way which is suitable for the computer program product, such as a removable solid state memory, e.g. a Universal Serial Bus (USB) drive.
  • USB Universal Serial Bus

Landscapes

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

Abstract

L'invention concerne un procédé de détermination de la transmission d'un service de radiodiffusion multimédia multidestinataire, MBMS, dans un réseau monofréquence MBMS, MBSFN. Le procédé est mis en œuvre dans un nœud de réseau associé à au moins un identificateur de cellule. Le procédé comprend l'étape de réception d'un événement de session de MBMS. De plus, pour chaque cellule du nœud de réseau, le procédé comprend les étapes suivantes : obtention d'une liste d'identificateurs de cellule pour chacun d'une pluralité de services MBMS; génération d'une liste de services actifs directs; génération d'une liste de services actifs indirects; formation d'une liste de services actifs contenant les éléments de la liste de services actifs directs et de la liste de services actifs indirects; et transmission de données de service MBMS pour tous les services MBMS de la liste de services actifs.
PCT/EP2016/060323 2016-05-09 2016-05-09 Détermination de la transmission d'un service mbms WO2017194089A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/060323 WO2017194089A1 (fr) 2016-05-09 2016-05-09 Détermination de la transmission d'un service mbms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/060323 WO2017194089A1 (fr) 2016-05-09 2016-05-09 Détermination de la transmission d'un service mbms

Publications (1)

Publication Number Publication Date
WO2017194089A1 true WO2017194089A1 (fr) 2017-11-16

Family

ID=55963353

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/060323 WO2017194089A1 (fr) 2016-05-09 2016-05-09 Détermination de la transmission d'un service mbms

Country Status (1)

Country Link
WO (1) WO2017194089A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110830919A (zh) * 2018-08-07 2020-02-21 成都鼎桥通信技术有限公司 业务组播资源控制方法和装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2124464A1 (fr) * 2007-03-16 2009-11-25 Da Tang Mobile Communications Equipment Co., Ltd. Procédé et dispositif pour déterminer un domaine de réseau à une seule fréquence
EP2434671A2 (fr) * 2006-11-07 2012-03-28 Qualcomm Incorporated Procédé et appareil pour renforcer des transmissions MBSFN
US20140036755A1 (en) * 2012-08-02 2014-02-06 Qualcomm Incorporated Mbms support in heterogeneous network and in-venue
WO2015065746A1 (fr) * 2013-10-31 2015-05-07 Motorola Solutions, Inc. Transmission dans un réseau monofréquence de services critiques pour la mission sur un réseau lte

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2434671A2 (fr) * 2006-11-07 2012-03-28 Qualcomm Incorporated Procédé et appareil pour renforcer des transmissions MBSFN
EP2124464A1 (fr) * 2007-03-16 2009-11-25 Da Tang Mobile Communications Equipment Co., Ltd. Procédé et dispositif pour déterminer un domaine de réseau à une seule fréquence
US20140036755A1 (en) * 2012-08-02 2014-02-06 Qualcomm Incorporated Mbms support in heterogeneous network and in-venue
WO2015065746A1 (fr) * 2013-10-31 2015-05-07 Motorola Solutions, Inc. Transmission dans un réseau monofréquence de services critiques pour la mission sur un réseau lte

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110830919A (zh) * 2018-08-07 2020-02-21 成都鼎桥通信技术有限公司 业务组播资源控制方法和装置
CN110830919B (zh) * 2018-08-07 2022-04-15 成都鼎桥通信技术有限公司 业务组播资源控制方法和装置

Similar Documents

Publication Publication Date Title
EP2894934B1 (fr) Procédé, dispositif et système de gestion de zone de groupe
RU2477580C2 (ru) Система и способ сигнализации о доступности нескольких вариантов абонентской услуги mbms
US20130170450A1 (en) Wireless broadcast/multicast service capacity over different link budgets and overlay networks
US8413201B2 (en) Method for deciding radio bearer of mobile IPTV system
US11234214B2 (en) Method and apparatus for providing broadcast/multicast services
US9510226B2 (en) Information acquiring method and base station
TWI719996B (zh) 針對多層ｍｂｓｆｎ的訊號傳遞支援
EP3437348A1 (fr) Réseau de communication mobile
WO2016107600A1 (fr) Procédé, dispositif et système prenant en charge une transmission de service de diffusion/multidiffusion multimédia
US20150358785A1 (en) Transmitting embms control information to wireless devices in a wireless telecommunications network
US20160013977A1 (en) Service Processing Method for New Carrier Type Cell, Apparatus, and Communications System
CN112584511B (zh) 一种网络切片的组播方法及装置
US9351280B2 (en) Apparatus and method for providing multicast and broadcast service in mobile communication environment
CN113016166B (zh) 一种多媒体业务的传输方法及装置
CN111372199B (zh) Mbms业务配置信息的发送方法
CN116250256A (zh) 用于组播通信的方法、第一网络设备和第二网络设备
US20180124838A1 (en) Group call setup in a group communications system
WO2017194089A1 (fr) Détermination de la transmission d'un service mbms
US10165549B2 (en) Allocating multimedia broadcast and multicast service sessions
CN112398605A (zh) 一种多播控制信道发送方法及装置
US20190059073A1 (en) Allocation of application signalling session
US20190116468A1 (en) Efficient broadcast to mobile device operating independently of a sim
EP4193612A1 (fr) Procédés et appareils de communication radio
CN107005816A (zh) 一种集群业务的处理方法及装置
US20130315123A1 (en) Method and Apparatus for Cellular Signaling

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16721798

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 16721798

Country of ref document: EP

Kind code of ref document: A1