Classifications

• • 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
  • H04W36/0085—Hand-off measurements
  • H04W36/0088—Scheduling hand-off measurements
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/18—Arrangements for synchronising broadcast or distribution via plural systems
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
  • H04H20/24—Arrangements for distribution of identical information via broadcast system and non-broadcast system
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
  • H04H20/26—Arrangements for switching distribution systems
• • 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
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W36/00—Hand-off or reselection arrangements
  • H04W36/14—Reselecting a network or an air interface
  • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/30—Resource management for broadcast services

Definitions

• the present invention relates in general to a telecommunication system operable to enable handovers for mobile user equipments between DVB-H and UMTS networks.
• 3G cellular networks have already started to deliver multimedia services based on streaming, as video clips from sport events or TV programs, their offers are still limited due to the inefficiency of the current unicast point-to-point (p-t-p) architecture in transmitting the same content to a large number of users. This limits the maximum number of users such systems can handle and prevents mass-market deployment, as both radio and transport network resources are physically limited.
• the technology DVB-H Digital Video Broadcast - Handheld
• DVB-H Digital Video Broadcast - Handheld
• DVB-H is an extension of the European terrestrial digital TV standard DVB-T (Digital Video Broadcast - Terrestrial), to reach handheld terminals or user equipments (UEs) devices.
• DVB-H reuses the same physical layer as DVB-T, and adds new features at the link layer, being able to share the same network infrastructure (e.g., transmitters, multiplexes, etc.).
• One of the major concerns of DVB-H networks is the cost of infrastructure deployment, which could lead to a price for service that is unaffordable for most users. This concern is very justified if the dimensioning of the network infrastructure is performed to support real-time streaming services and nearly full area coverage, as in traditional broadcasting.
• DVB-H terminals suffer from more severe propagation conditions than DVB-T (especially for indoor and vehicular reception), reusing existing broadcasting towers for TV and radio is not enough to achieve a satisfactory DVB-H coverage.
• a large number of sites are then required to deploy additional DVB-H transmitters or repeaters (gap fillers, and forming dense Single Frequency Networks (SFNs), which implies a larger investment in infrastructure. This penalty is particularly evident for high coverage area targets (e.g., over 90 percent of service area locations).
• MFN Multi-Frequency Network
• the 3G standard was enhanced with Multimedia Broadcast Multicast Services (MBMS).
• MBMS Multimedia Broadcast Multicast Services
• UMTS Universal Mobile Telecommunication System
• LCR TDD Low Chip Rate Time Division Duplex
• HCR TDD High Chip Rate Time Division Duplex
• MBMS offers limited capacity (approximately 192 ⁇ 320kb/s per time slots), and gaps are needed between different MBMS broadcast clusters to reduce the adjacent cluster interference, thus it is unlikely that it will become a good option for mass multimedia services alone.
• DVB-H enables the convergence of services from broadcast and cellular domains, allowing mobile broadcast interactive services with cellular unicast channel.
• the convergence of DVB-H and cellular network also makes it possible to recover lost information in DVB-H session through the bidirectional cellular path.
• the invention proposes a telecommunication method for a mobile user equipment to seamlessly receive broadcast services available from a telecommunication network and a broadcast network while leaving a telecommunication network and being within the coverage of a broadcast network according to claims 1 to 5.
• the invention also proposes a telecommunication method for a mobile user equipment to seamlessly receive broadcast services available from a telecommunication network and a broadcast network while leaving a broadcast network and being within the coverage of a telecommunication network according to claims 6 to 10.
• the invention also relates to a telecommunication system for a mobile user equipment to seamlessly receive broadcast services available from a telecommunication network and a broadcast network while leaving a telecommunication network and being within the coverage of a broadcast network according to claims 1 1 to 15.
• the invention also relates to a telecommunication system for a mobile user equipment to seamlessly receive broadcast services available from a telecommunication network and a broadcast network while leaving a broadcast network and being within the coverage of a telecommunication network according to claims 16 to 20.
• the invention also relates to a mobile user equipment to seamlessly receive broadcast services available from a telecommunication network and a broadcast network while leaving a telecommunication network and being within the coverage of a broadcast network according to claims 21 to 25.
• the invention also relates to a mobile user equipment to seamlessly receive broadcast services available from a telecommunication network and a broadcast network while leaving a broadcast network and being within the coverage of a telecommunication network according to claims 26 to 30.
• the invention also relates to a computer program to perform a method for a mobile user equipment to seamlessly receive broadcast services available from a telecommunication network and a broadcast network while leaving a telecommunication network and being within the coverage of a broadcast network according to claim 31.
• the invention also relates to a computer program to perform a method for a mobile user equipment to seamlessly receive broadcast services available from a telecommunication network and a broadcast network while leaving a broadcast network and being within the coverage of a telecommunication network according to claim 32.
• Figure 1 schematically illustrates a hybrid cellular and broadcasting network incorporating two clusters of the cellular cells and a DVB-H cell according to an embodiment of the present invention
• FIGS. 2a-2b schematically illustrate a timing to process a DVB-H and MBMS monitor according to an embodiment of the present invention
• Figure 3 schematically illustrates a converged network architecture with shared media server according to an embodiment of the present invention
• Figure 4 schematically illustrates a terminal with the capability of receiving DVB-H and MBMS signal according to an embodiment of the present invention
• Figure 5 schematically illustrates a flow chart of a method for the handover process from Cellular system to DVB-H according to an embodiment of the present invention
• Figure 6 schematically illustrates a flow chart of a method for the handover process from DVB-H to Cellular MBMS system according to an embodiment of the present invention.
• This proposal aims at providing a new hybrid location based broadcast architecture based on terrestrial digital broadcast (such as DVB-H) and MBMS technology. Broadcast channel handover scheme between terrestrial broadcasting networks (such as DVB-H, MEDIA-FLO, DMB and etc.) and the TDD MBMS networks (such as UMTS LCR TDD, UMTS HCR TDD, and etc.).
• terrestrial broadcasting networks such as DVB-H, MEDIA-FLO, DMB and etc.
• TDD MBMS networks such as UMTS LCR TDD, UMTS HCR TDD, and etc.
• the present invention relates to a method and system to improve the continuity of the location based broadcast network, which enable different programs broadcasted in different geographic areas, targeting the need of different users.
• the present invention relates to network and cell handover procedures in hybrid wireless communications systems. More particularly, aspects of the invention are based on a hybrid terrestrial broadcast network (such as DVB-H, DMB, CMMB etc.) and cellular MBMS network architecture.
• a new broadcast channel handover procedure between the terrestrial broadcast network (such as DVB-H, DMB, CMMB, etc.) and cellular MBMS network are proposed.
• the content synchronization scheme between MBMS network and terrestrial broadcast network are proposed.
• the Multimedia Broadcast/Multicast Service (MBMS) technical specification defines mobile multimedia services over 3G cellular networks.
• MBMS represents a way for 3G network operators to offer multimedia content over their GPRS/EDGE or UMTS networks without unnecessarily consuming capacity for voice communications.
• MBMS multimedia content is delivered via IP packets; either as a streaming service or as a file downloads service to the end user. It is a unidirectional point-to-multipoint service in which data is transmitted from a single source entity to a group of users in a specific area. With MBMS, the same content is transmitted to multiple users in a unidirectional fashion, typically by multiple cells in order to cover the large area in which the service is provided.
• UMTS TDD (TD-SCDMA and TD-CDMA) base stations are inherently synchronized, as required for a TDD air interface.
• GPS Global Positioning System
• LCR and HCR the base station of the UMTS TDD
• the content is synchronized on all base stations in a service area.
• the new enhancement of UMTS TDD MBMS is composed a synchronised, single frequency broadcast network, therefore mobile devices can combine signals from a cluster of cells and thus the signal is re-enforced, neighbouring cells do not interfere, a higher C/l gains can be achieved.
• the service can be delivered based on one or several time slots of one or a group of carriers of the cellular network, thus both broadcast and the unicast services will be provided on the same group of carriers.
• DVB-H is backward compatible with DVB-T
• time slicing results in off-periods in DVB-H, which makes the adjacent cell monitor possible in the off-period of DVB-H.
• handover can occur within MFN networks, between two different SFN areas that are part of the same network.
• MFN Mobility Management Function
• Said hybrid broadcast network is composed of several cellular cells and DVB-H cells, the DVB-H cells are assumed (as it generally the case) to be larger than cellular cells.
• the DVB-H cells are assumed (as it generally the case) to be larger than cellular cells.
• the DVB-H coverage there are some clusters of cellular cells, one cluster is generally composed of several continuous cells, all the cells share the same cell ID inside a cluster, the same content is broadcasted synchronously in a cluster.
• the signals from different cells of a cluster can be combined in the receiver to get a higher broadcast gain. This way, different contents may be broadcasted into different clusters. To eliminate inter- cluster interferences, there should be some distance between the different clusters.
• the apparent drawback comes from the discontinuous broadcast when user equipments move from one location to another location.
• users When users move away from a cluster, they may be able to receive the DVB-H broadcast service in order to continue the broadcast service by a broadcast channel handover scheme.
• cellular cells clusters are used to cover areas such as e.g. densely populated areas, commercial centers, office buildings, kindergartens, campus, hospitals, hotels, traffic route, entertainment centers etc... which generally need a good indoor coverage and a diversity of the message broadcast, such as emergence notification and location based advertisements.
• a gap is needed between these different clusters to prevent inter-cluster interferences.
• the location based mobile broadcast may be realized in a spectrum efficient way without looking for more frequency to construct a MFN.
• Using cellular MBMS broadcast channels for location based broadcast services bear on two advantages: - cellular broadcast channels complement the DVB-H for indoor coverage thanks to the better indoor coverage of cellular network;
• - localized content may be broadcasted cluster by cluster with no requirement of extra spectrum for building DVB-H MFN (multi-frequency network) network.
• DVB-H MFN multi-frequency network
• Figure 1 describes cellular UMTS and DVB-H networks coverage.
• DVB-H coverage is generated by a DVB-H transmitter 100.
• Cluster C1 is composed of UMTS TDD LCR cells 101 , 102 and 103.
• Cluster C2 is composed of UMTS TDD LCR cells 201 , 202, 203.
• Different dedicated information may be broadcasted in cluster C1 and C2. For instance, instructions may be broadcasted to some clusters during emergency events, such as e.g. fire or traffic jam, in the related area.
• the terminals or user equipments (UEs) 1 a, 2a and 3a may receive both UMTS TDD LCR MBMS broadcast signals and terrestrial broadcast DVB-H signals.
• Terminal or UE 1 a is within the coverage of cluster C1 and may only receive broadcast signals from cluster C1 and DVB-H (if DVB-H signal is strong enough), but the terminal 1 a is not able to receive the broadcast services from the cluster C2.
• Terminal 2a is within the coverage of cluster C2 and may only receive broadcast signals from C2 and DVB-H (if DVB-H signal is strong enough), but 2a is not able to receive the broadcast service from the cluster C1.
• Terminal 3a is in the gap between cluster C1 and cluster C2 and within the coverage of DVB-H signals transmitted by the DVB- H transmitter 100. Terminal 3a can thus be only provided with DVB-H broadcast services.
• a broadcast channels handover has to be considered when a user moves from one cluster to another area. For instance, when the terminal 1 a is moving away from the area covered by the cluster C1 , it detects that the cellular signal is lower than the predetermined threshold MBMS_THD at the edge of cluster C1.
• the DVB-H signals monitoring is triggered thereafter. As shown in the figure 3, DVB-H signal could be monitored by DVB-H receiver 503, while MBMS signals could be received simultaneously.
• DVB-H signal monitor is quite different from the signal monitor in MFN, as no offtime is used in the DVB-H signal monitor. However, the "lower than MBMSJ ⁇ D" event will wakeup the DVB-H receiver.
• a sub-frame with a period of 5 ms is composed of 10 time slots, in which TSO, DWPTS,TS3, TS4, TS5 and TS6 are downlink time slots; and UPPTS, TS1 and TS2 are uplink time slots.
• TSO is used for system message broadcasting.
• TS3 is configured as a point-to-multicast (p-to-m) broadcasting slot, meaning that every terminal in the cluster is able to receive the same broadcasting service through TS3.
• the other time slots in the sub- frame can be used for voice calls or other unicast services.
• the broadcast time slots are configured dynamically with the increasing need of such kind of service or diminished requirements of this service for different time and places, this is different from the current existing technology that using the fix resources used for broadcast services, which may lead to under-utilized spectrum for different scenarios.
• the apparent advantage of the broadcast or unicast resources configurable flexibility is that it could minimize the underutilized spectrum with best effort, thus potentially increasing the practical spectrum efficiency.
• the handover measurement in DVB-H system has to be performed in the off- time as shown in Figure 2b; no off time is scheduled in the broadcast channel of the cellular MBMS system, the handover measurement can be implemented in the idle time slot of the cellular system.
• the scheme makes a more cost efficient handover than DVB-H handover in MFN scenarios.
• terminal 1 a detects that the broadcast signal from the UMTS LCR TDD cellular system, and reports the monitor results to the Radio Network Controller periodically.
• the Radio network controller finds that the signal strength is lower than a predetermined threshold, it will wake up the DVB-H receiver 503 for signal monitor.
• DVB-H receiver 503 will receive the MPE sections for monitoring after the DVB-H synchronization process.
• terminal can power down the DVB-H receiver when DVB-H monitor process is completed.
• it is necessary to define a special DVB-H monitor mode During this mode, several MPEs of DVB-H could be monitored continuously under the control of central controller 500.
• the DVB-H monitor mode is different from the DVB-H working mode, as no inter-burst off time is available in the DVB-H monitor mode, however, inter-burst offtime is necessary to prolong the battery life for DVB-H work mode.
• the average value of DVB-H monitor results are submitted to RNC. Radio Network Controller makes the decision according to the measurement results. If RNC finds that the MBMS signal is weaker than the threshold or according to predetermined decision algorithms, it decides to switch to DVB-H, to make the seamless handover, it will transfer a HANDOVERtoDVB-H command to the terminal 1 a, 1a processes the handover process after receiving this command.
• One mode is seamless handover; another mode is automatic channel switch handover.
• Mobile MBMS and DVB-H network share the same broadcast content source 300. Both MBMS network and the DVB-H network can get the synchronization from GPS. As the network delay for MBMS and DVB-H may be different, a synchronization scheme should be developed to guarantee the content synchronization of the two networks at the UE receiving side.
• Pair channels should be defined for MBMS and DVB-H network to hold the same contents synchronously. Assuming two regional channels are available in Cluster C1 , C1_ch1 and C1_ch2, the counterpart pair channels in DVB-H network should be defined accordingly, channel PAIR_C1_ch1 in DVB-H network defined as pair channel with channel C1_ch1 in cluster C1 of MBMS network; Channel PAIR_C1_ch2 in DVB-H network defined as pair channel with channel C1_ch2 in cluster C2 of MBMS network.
• the unified SERVICE ID should be defined for the same service that is broadcasted in MBMS network and DVB-H network.
• SYNC-U 600 receives the source packet data from the Multicast and Broadcast Multimedia Source 300, and makes the synchronization preprocessing before distributing the packet data to the MBMS system and DVB-H system.
• SYNC-U 600 receives the reference synchronization signal, such as GPS as a reference to process the received source data from 300.
• the pre-processing functions in SYNC-U include:
• Timing stamp processing add the timing stamp information to the transmission stream data packet from the source 300.
• the time stamp indicates the time instant when packet has to be transmitted to the radio.
• Propagation delay variance elimination process the stamped data has to be sent early enough to the concerned systems, such as MBMS or DVB- H systems in this embodiment so as different systems are able to buffer the data until the radio transmission time occurs.
• SYNC-U 600 is able to receive the delay configuration information through the connection between SYNC-U 600 and GGSN 302. on the other hand, SYNC-U is able to receive the delay configuration from DVB-
• SYNC-U is able to calculate the TA (time advance)
• the stamped data is distributed to the corresponding systems.
• SYNC-MAP units can be introduced to adapt the different transmission format and transmission delay in different systems.
• the stamped data is fed into MB-SC or GGSN.
• SYNC-MAP unit 601 is introduced in UNTRAN MBMS system to extract the synchronization timing in the data packets and calculate the CFN for the data packet.
• MAC-m in UTRAN configures the beginning CFN for data packets in one TTI then copy it to the Node Bs corresponding to the FACH FP channel. Based on the unified SFN frame number and identical CFN, Node Bs obtain the transmission time in radio interface, as a result, the synchronization transmission between multi cells is realized.
• the transmission delay for different UTRAN can be considered as usual.
• the stamped data could be fed into the GGSN directly for further processing.
• the stamped data packet is fed into IPE, the corresponding timing is extracted at SYNC-MAP unit 602 and fed into the SFN-adapter 403 to form the DVB-H specific timing according to different path delay.
• the advantage of this scheme is that inter-GGSN synchronization can be achieved. What's more, by introducing the SYNC-MAP unit, the synchronization between MBMS and DVB-H can be achieved. This should not limit to MBMS or DVB-H system, as SYNC_MAP can be adapt to different system. Thus the content synchronization between MBMS and DVB-H can be achieved.
• the service is able to be sent out simultaneously from MBMS and DVB-H modulator and transmitter 404. And the services in paired channels can be received simultaneously by the terminal 1 a.
• specific SERVICEJD format has been defined in different systems, such as UMTS MBMS and DVB-H, there is a need to define the common SERVICEJD format for the share services to facilitate the seamless handover between different systems. Therefore, the SERVICE_ID_U is introduced in SYNC-U 600 and Multicast and Broadcast Multicast Source 300.
• the SERVICEJDJJ is defined as following:
• SERVICEJDJJ is the unique identifier of a service within a TS globally.
• the format of SERVICE_ID_U is out of the scope of this patent and therefore can be defined in another literature.
• 1 a first checks the list of SERVICEJDJJ of the DVB-H, when the value of a SERVICEJD_U of DVB-H network is the same as that of the Cluster C1 of the MBMS network, that means the two channels are paired channels.
• the broadcast channel is switched from cellular MBMS system to the terrestrial broadcast channel.
• the seamless handover can be implemented in the location based broadcasting network.
• Figure 4 describes a flowchart of a seamless handover from cellular system UMTS MBMS to DVB-H is shown in figure 4.
• the handover procedure starts and terminal, or UE 1 a receives in an act 420 the broadcast program through TS3, TS3 is configured as a broadcast Time Slot, which is also called C1_ch1.
• the SERVICEJDJJ of the channel is read out by System control 500 and stored in the memory 501 of the terminal 1 a.
• the quality of the broadcasting signal in TS3 is reported by the terminal 1 a periodically to RNC.
• the RNC checks to find if the quality of the broadcast signal is lower than the predetermined threshold, then the RNC sends the message DVB-H_MEA to 1 a in an act 440.
• 1 a activates the integrated DVB-H receiver 503 as shown in figure 4 and synchronizes with the DVB-H system.
• This consists in the user equipment synchronizing the idle time slot of the UMTS network with the time-slice burst of the DVB-H network in order for the UE to be able to monitor said burst during the allocated idle time slot.
• the monitoring of said burst of DVB-H broadcasting allows measuring the level of the signal corresponding to the DVB-H broadcast services.
• UE 1 a receives the broadcast signal from DVB-H, calculates the Received Signal Strength Indicator (RSSI) of the received DVB-H signal and reports the measurement to RNC.
• RSSI Received Signal Strength Indicator
• the RNC checks to find if the DVB-H measurement is greater than the threshold, then it will instruct 1 a to check the SERVICEJDJJ list of DVB-H in an act 470.
• the matching SERVICEJD_U of the broadcast service is found out in DVB-H signal in an act 480, then the paired channel of C1 -Ch1 , that is Pair_C1_ch1 has been found and, in an act 490, 1a switches to the paired DVB-H channel, pair_C1_ch1 , and power down the MBMS transceiver 502.
• terminal 3a When terminal 3a moves from the DVB-H coverage area to cluster C2, it reports the DVB-H receiving signal strength RSSI periodically to the UMTS
• the RNC uses a DVB-H_REPORT message.
• the RNC sends back an MBMS-
• the RNC sends an MBMS signal in slot TS3 after receiving the MBMSJvIEA command and reports the measurement results to the RNC.
• the RNC sends an
• Figure 6 describes a flowchart of handover execution process from DVB-H to UMTS MBMS.
• the handover procedure starts and terminal 3a receives in an act 520 the broadcast program through DVB-H.
• the SERVICEJDJJ of the channel is read out by the system control 500 and stored in the memory 501 of the terminal 3a as shown in Figure 4.
• the quality of the DVB-H broadcast signal is reported by the terminal 3a periodically to the RNC when the UE is in the coverage of the UMTS network.
• the RNC checks to find if the quality of the broadcast signal is lower than the predetermined threshold DVB_THD. If so, the RNC sends the message MBMS_MEA to 3a in an act 540.
• 3a activates the integrated MBMS transceiver 502 and synchronizes with the DVB-H system.
• This consists in the user equipment synchronizing at least one time slot used for broadcasting MBMS broadcasted services of the UMTS network with an off-peak interval of the DVB-H network in order for the UE to be able to monitor said time slot used for broadcasting MBMS broadcasted services during the off-peak interval of the DVB-H
• the monitoring of said time slot used for broadcasting MBMS broadcasted services allows measuring the level of the signal corresponding to MBMS broadcasted services.
• 3a receives the broadcast signal from DVB-H, calculates the RSSI of the received MBMS signal and reports the measurement to RNC. In an act 560, the RNC checks to find if the MBMS measurement is greater than the threshold MBMS_THD.
• pair relationship is not defined for all the channels between MBMS and DVB-H broadcast network, no identical SERVICE_ID_U is available for both networks.
• the seamless handover is not possible for this case.
• Channels with random SERVICE_ID_U could be picked for the automatic channel switch handover when the subscribers move between MBMS coverage area to DVB-H coverage area.
• some rules could be defined for automatic channel switch when subscribers move from one geographic broadcast area to another.
• service switch table could be defined in RNC or terminal, which is stored in the memory 501 of the terminal.
• DVB-H is taken as an example for embodiment description
• the other terrestrial broadcast technologies such as DVB-T, T-DMB, MedioFlo, CMMB and etc.
• UMTS LCR TDD MBMS is taken as an example for embodiment description
• the other TDD based MBMS technologies such as LTE TDD E- MBMS, MBMS over WiMAX and etc...
• the RNC is taken as an example for signal measurement reporting, threshold comparing and handover decision making in this embodiment description, thus the related signaling and procedures are defined as a reference.
• the other network entities in the different network architecture such as BM-SC centre could also be used for this function.
• the network entities could be used for signal measurement reporting, threshold comparing and handover decision making. It is apparent that they belong to the scope of this invention.
• the signal measurement reporting, threshold comparing and handover decision making can also be undertaken by related terminal.
• the threshold parameter has to be set or updated by the network through the system information or control channel periodically.
• Terminal receives the threshold information and store in the memory of terminal for measurement results comparing with threshold and making handover decision between MBMS and terrestrial broadcast network.
• signal strength such as RSSI
• the other parameters related to the error rate measurement and the radio reception measurement are also belong to the scope of this invention.
• the method according to the invention wherein the broadcasted services are broadcasted from the broadcast network in bursts separated by off-peak intervals, said method further comprises, prior to the measurement of the second level by the user equipment during the idle time slot an act of synchronizing the idle time slot with a burst received from the broadcasted network.
• the broadcasted services are broadcasted from the broadcast network in bursts separated by off-peak intervals and wherein the telecommunication network broadcasted services are broadcasted on at least one broadcasting time slot, said method further comprising, prior to the act of determining an off-peak interval allowing the measurement of the second signal level by the user equipment, an act of synchronizing an off-peak interval with at least one broadcasting time slot of the telecommunication network.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=40824805

Family Applications (1)

Country Status (2)

Families Citing this family (4)

• 2008
  • 2008-12-29 WO PCT/IB2008/055697 patent/WO2009083938A2/en active Application Filing
  • 2008-12-29 EP EP08866155A patent/EP2241132A2/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events