WO2008029181A1 - Procédé de comptage pour un réseau de radiodiffusion mobile - Google Patents

Procédé de comptage pour un réseau de radiodiffusion mobile Download PDF

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Publication number
WO2008029181A1
WO2008029181A1 PCT/GB2007/050521 GB2007050521W WO2008029181A1 WO 2008029181 A1 WO2008029181 A1 WO 2008029181A1 GB 2007050521 W GB2007050521 W GB 2007050521W WO 2008029181 A1 WO2008029181 A1 WO 2008029181A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminals
cell
broadcast
surrounding
base station
Prior art date
Application number
PCT/GB2007/050521
Other languages
English (en)
Inventor
Thomas Malcolm Chapman
Kristan Barraclough
Original Assignee
Nokia Siemens Networks Gmbh & Co. Kg
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
Priority claimed from GBGB0617267.0A external-priority patent/GB0617267D0/en
Application filed by Nokia Siemens Networks Gmbh & Co. Kg filed Critical Nokia Siemens Networks Gmbh & Co. Kg
Publication of WO2008029181A1 publication Critical patent/WO2008029181A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • This invention relates to a counting method for a single frequency broadcast network.
  • SFN single frequency network
  • UMTS Universal Mobile Telecommunications System
  • UTRAN Universal Mobile Telecommunications System
  • LTE long term evolution
  • PtM point to multipoint
  • An example of a broadcast service is multimedia broadcast multicast service (MBMS), although the present invention is not limited to services of this type.
  • MBMS multimedia broadcast multicast service
  • the target cell were to stop transmitting MBMS and start transmitting something else, then there would be a double penalty for such user equipments (UEs), arising from the loss of broadcast signal energy and the increase in neighbour cell interference from any other signal that is sent instead. If there are no nearby UEs that would benefit from SFN from the target cell then it is a waste of resources to transmit PtM MBMS unnecessarily.
  • UEs user equipments
  • WCDMA wideband code division multiple access
  • RNC radio network controller
  • a base station in an empty cell of a single frequency network may still make a point to multipoint broadcast transmission to give those terminals the benefit of constructive combining of the signal.
  • the base station first counts terminals in its own cell; then counts terminals in one or more surrounding cells; and wherein a base station of any cell which determines that it has insufficient terminals in its own, or surrounding cells to justify a broadcast transmission notifies base stations in the surrounding cells that it will use a point to point transmission in its cell.
  • the surrounding cell is an adjacent cell.
  • Surrounding cells are not limited to being adjacent, but adjacent cells will typically have more impact than those further away.
  • a count occurs at a specified time, such that surrounding cells reduce their transmissions and listen to a count in the cell.
  • the base station notifies surrounding base stations that it is about to perform a count at the specified time, in order that the surrounding base stations can listen to the counting responses
  • power levels of counting responses from each terminal are predetermined and known to each base station and surrounding base stations are able to use received power levels of the counting responses, together with the number of terminals counted, to determine whether a broadcast is required.
  • the broadcast is transmitted using the Multimedia Broadcast &
  • MBMS Multicast
  • Figure 1 illustrates a first scenario in which the method of the present invention is applied
  • Figure 2 illustrates a second scenario in which the method of the present invention is applied.
  • Figure 3 illustrates a third scenario in which the method of the present invention is applied.
  • a counting method is applied in order to determine whether a base station of a cell should transmit a broadcast, a point to point transmission, or no transmission. If a cell has any terminals within it, then a broadcast would be made by that cell. However, for surrounding cells, the decision is less clear- cut, so the method of the present invention is applied.
  • Surrounding cells can include cells which have no direct border with a cell containing a terminal, but might still have some impact on that terminal if the base station of the surrounding cell transmits.
  • Fig. 1 there are a number of cells 1 to 10, all of which either contain a terminal, or are close enough to a terminal in a bordering cell to need to transmit, even although the cell itself is empty.
  • cells 1, 3, 4, 7 have terminals within them, so they will transmit.
  • the other cells 2, 5, 6, 8, 9, 10 have a boundary with a cell which contains a terminal.
  • FIG. 2 another example is given in which terminals 17, 18, 19 are clustered in cell 3 and one terminal is present in cell 4.
  • lower cells 6, 7 have no terminals nearby, so do not need to participate in the single frequency network transmission, but cells 1, 2 and 5 are close enough to have some effect, so the base stations in those cells do transmit a broadcast for the benefit of the terminals.
  • Fig. 3 illustrates an example where, in addition to terminals 23, 24, 25, 22 in cells 3, 4 there is a single terminal 21 present at the bottom of cell 6. Since only that one terminal 21 would benefit from SFN signals from the lower cells 6, 7 then terminal 21 is served by a point to point transmission from cell 6 in order that the lower cells do not need to broadcast using point to multipoint.
  • the decision on whether or not to broadcast from a cell is based on counting the number of terminals in the cell and in surrounding cells.
  • the received power level provides further refinement.
  • Neighbouring base stations or Node Bs of the cell are made aware of when another Node B plans to undertake an MBMS counting procedure.
  • the neighbouring cells reduce the amount of uplink transmissions in their own cells and listen for counting responses in the counting cell.
  • UEs transmit counting responses at a known power level. Hence by listening to the counting responses and examining the received power levels, neighbour Node Bs are able to determine how many UEs there are in neighbour cells that would benefit from the cell transmitting PtM MBMS in SFN.
  • the advantage is a more efficient management of radio resources, in which Node Bs in an SFN network do not transmit SFN MBMS where not necessary, but are able to take into account the reception requirements of UEs in neighbour cells, but close to the cell borders.
  • the UEs transmit counting responses with a known power level.
  • the information obtained on the number and positions of MBMS UEs in neighbour cells can be used by a cell in order to decide whether it is helpful to transmit point to multipoint MBMS.
  • the present invention provides a counting procedure, which can be used for MBMS, or for other defined broadcast protocols, in which the counting base station informs base stations in surrounding cells of the proposed timing of the count and the surrounding base stations respond by reducing the amount of uplink transmissions in their own cells during the counting time and listening to the responses of terminals in the counting cell.
  • a counting and power level related procedure include WiMAX, WLAN, or DVB-H.

Landscapes

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

Abstract

Un procédé de comptage destiné à un réseau de radiodiffusion monofréquence comprenant au moins une station de base et une pluralité de terminaux consiste à compter le nombre de terminaux (21, 22, 23, 24, 25) présents dans une cellule (6, 4, 3) de la station de base, lesdits terminaux nécessitant des services de radiodiffusion. Le nombre de terminaux présents dans les cellules voisines des stations de base voisines, ces terminaux nécessitant des services de radiodiffusion, est ensuite compté et il est déterminé si le nombre de terminaux présents dans n'importe quelle cellule est suffisant pour que la station de base utilise une transmission de radiodiffusion.
PCT/GB2007/050521 2006-09-04 2007-09-03 Procédé de comptage pour un réseau de radiodiffusion mobile WO2008029181A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB0617267.0A GB0617267D0 (en) 2006-09-04 2006-09-04 Counting procedure
GB0617267.0 2006-09-04
GB0716033A GB2441425A (en) 2006-09-04 2007-08-17 A counting method for a single frequency broadcast network
GB0716033.6 2007-08-17

Publications (1)

Publication Number Publication Date
WO2008029181A1 true WO2008029181A1 (fr) 2008-03-13

Family

ID=38813719

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2007/050521 WO2008029181A1 (fr) 2006-09-04 2007-09-03 Procédé de comptage pour un réseau de radiodiffusion mobile

Country Status (1)

Country Link
WO (1) WO2008029181A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012000332A1 (fr) * 2010-06-29 2012-01-05 中兴通讯股份有限公司 Procédé et système permettant à un équipement utilisateur de transmettre une réponse de comptage dans un service de diffusion multidiffusion multimédia
CN102595336A (zh) * 2012-03-05 2012-07-18 信源通科技（深圳）有限公司 小区微播应用系统及方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040162071A1 (en) * 2003-02-18 2004-08-19 Francesco Grilli Method and apparatus to track count of broadcast content recipients in a wireless telephone network
EP1475973A1 (fr) * 2003-05-09 2004-11-10 Siemens Mobile Communications S.p.A. Méthode de transmission de services multimédia dans des réseaux UMTS par multidiffusion immédiate d'un sous-ensemble d'un flux de données
FR2866188A1 (fr) * 2004-02-11 2005-08-12 Nec Technologies Uk Ltd Procede d'optimisation des ressources radio allouees a un service mbms

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040162071A1 (en) * 2003-02-18 2004-08-19 Francesco Grilli Method and apparatus to track count of broadcast content recipients in a wireless telephone network
EP1475973A1 (fr) * 2003-05-09 2004-11-10 Siemens Mobile Communications S.p.A. Méthode de transmission de services multimédia dans des réseaux UMTS par multidiffusion immédiate d'un sous-ensemble d'un flux de données
FR2866188A1 (fr) * 2004-02-11 2005-08-12 Nec Technologies Uk Ltd Procede d'optimisation des ressources radio allouees a un service mbms

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012000332A1 (fr) * 2010-06-29 2012-01-05 中兴通讯股份有限公司 Procédé et système permettant à un équipement utilisateur de transmettre une réponse de comptage dans un service de diffusion multidiffusion multimédia
EP2568725A1 (fr) * 2010-06-29 2013-03-13 ZTE Corporation Procédé et système permettant à un équipement utilisateur de transmettre une réponse de comptage dans un service de diffusion multidiffusion multimédia
EP2568725A4 (fr) * 2010-06-29 2014-03-19 Zte Corp Procédé et système permettant à un équipement utilisateur de transmettre une réponse de comptage dans un service de diffusion multidiffusion multimédia
US8879459B2 (en) 2010-06-29 2014-11-04 Zte Corporation Method and system for sending counting response by user equipment in multimedia broadcast multicast service
CN102595336A (zh) * 2012-03-05 2012-07-18 信源通科技（深圳）有限公司 小区微播应用系统及方法

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