WO2018083678A1 - Configuration de sous-trames non-mbms (services de diffusion et de multidiffusion multimédia) pour des informations de système supplémentaires - Google Patents

Configuration de sous-trames non-mbms (services de diffusion et de multidiffusion multimédia) pour des informations de système supplémentaires Download PDF

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Publication number
WO2018083678A1
WO2018083678A1 PCT/IB2017/056936 IB2017056936W WO2018083678A1 WO 2018083678 A1 WO2018083678 A1 WO 2018083678A1 IB 2017056936 W IB2017056936 W IB 2017056936W WO 2018083678 A1 WO2018083678 A1 WO 2018083678A1
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Prior art keywords
mbms
subframe
subframes
network
subframe configuration
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PCT/IB2017/056936
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English (en)
Inventor
Helka-Liina Määttanen
Mark Curran
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Telefonaktiebolaget Lm Ericsson (Publ)
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Publication of WO2018083678A1 publication Critical patent/WO2018083678A1/fr

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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
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • MBMS Multimedia Broadcast Multicast Services
  • MB S provides for a point-to-multipoint interface for existing and upcoming 3GPP cellular networks designed to deliver efficient broadcast and multicast services, both within a cell as we!! as within the core network.
  • MBMS also defines transmission via single-frequency network configurations.
  • the specification is referred to as Evolved Multimedia Broadcast Multicast Services (eMBMS) when transmissions are delivered through an LTE network.
  • eMBMS Evolved Multimedia Broadcast Multicast Services
  • eMBMS includes specification of a longer cyclic prefix (e.g., greater than 33.33 s) for use in a mixed unicast/eMBMS carrier for large single frequency network (SFN) delay spread environment (e.g., 15 km or larger inter-site distance), which guarantees coexistence of legacy and new prefixes on the same carrier, while achieving a spectral efficiency of at least 2 bps/Hz.
  • eMBMS may also specify use of subframes 0, 4, 5, 9 (FS1) and 0, 1 , 5, 6 (FS2) for multi- broadcast single frequency networks (MBSFN).
  • Non-MBSFN subframes for unicast may only be used as secondary cell (Scell).
  • eMBMS may also specify configuration of MBSFN subframes without a unicast control region and cell-specific reference signals. Both connected and idle mode operation are included.
  • eMBMS may include: (a) support for a standalone carrier with all downlink subframes dedicated to MBSFN transmission and self-contained eMBMS signaling, which includes information in SIB13, SIB15, SIB16; (b) support for multi-carrier eMBMS/unicast operation involving reception from one or more eMBMS cells that may be non-collocated and asynchronous with one or more cells that are simultaneously used for unicast; and (c) a user equipment (UE) may receive TV transport service without being authenticated.
  • UE user equipment
  • Enhancements may include UE and base station (BS) radio frequency (RF) core requirements for a new cyclic prefix (CP) length for eMBMS.
  • New time division duplex (TDD) uplink and downlink configurations for FS2 may or may not be included.
  • particular eMBMS enhancements e.g., using additional subframes and removing the unicast control region and cell-specific reference signals
  • a carrier that supports the use of more subframes for MBSFN, as well as completely excluding unicast regions in the MBSFN subframes may be referred to as a FeMBMS (further enhanced MBMS) carrier.
  • An FeMBMS carrier may use almost all subframes for MBSFN, and may completely exclude unicast regions in the MBSFN subframes.
  • To support idle mode FeMBMS operation on the carrier particular system information needs to be transmitted on the carrier.
  • MBMS MBSFN
  • one solution is to use all the subframes as MBSFN subframes.
  • MIB MasterlnformationBlock
  • SIB1 SystemlnformationBlockTypel
  • SIBs should be broadcasted on this carrier and describe the physical resources where the SI can be broadcasted.
  • the needed system information for MBSFN carrier inside SIB1 , SIB2 and SIB13 may be provided on the FeMBMS carrier.
  • SIB15 and SIB16 may be delivered on the FeMBMS carrier.
  • SIB10, SIB11 and SIB12 may also be delivered on the FeMBMS carrier.
  • the FeMBMS carrier For synchronization and acquisition of system information on a FeMBMS carrier with one- hundred percent MBSFN subframe allocation, the FeMBMS carrier transmits a periodic subframe cell acquisition subframe (CAS).
  • CAS subframe cell acquisition subframe
  • CAS supports primary synchronization signal (PSS), secondary synchronization signal (SSS), cell-specific reference signal (CRS), physical broadcast channel (PBCH), physical downlink control channel (PDCCH), and physical downlink shared channel (PDSCH) (e.g., for system information (SI)).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • CRS cell-specific reference signal
  • PBCH physical broadcast channel
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • SI system information
  • CAS is typically transmitted in subframe 0 with a period of 40 ms.
  • the MIB is provided by the PBCH in every CAS.
  • the SI is provided by the PDSCH in CAS.
  • the first SI may be a combination of SIBs.
  • MCCH change notification and SI modification notification are sent in PDCCH region of the CAS.
  • Particular solutions may transmit multiple SI messages in the same subframe by using different RNTIs.
  • SI modification notification may be conveyed to the UE with Direct Indication signaling.
  • SIB1 SystemlnformationBlockTypel
  • SI Carrying other SIBs
  • SIB1 is a message in itself whereas the other SIB types are Information Elements that are included in the SI message.
  • SIB1 may be combined with other SIBs from a size perspective.
  • the SIB1 message for the FeMBMS carrier may contain also other system information relevant for MBMS reception, such as content of SIB13 and even relevant content from SIB2.
  • TS36.331 may include new message class and message structure for FeMBMS similar to SC-PTM, because sending only the SIB1 content in the SIB1 message is not efficient.
  • the new message may be referred to as new SIB1 or SI1 message.
  • SIBs may typically need to be transmitted on the FeMBMS carrier, such as the SIB15 with MBMS service continuity information, the SIB16 with time information and SIB10, SIB1 1 and SIB12 with ETWS and CMAS warning information.
  • FIGURE 1 Prior Art showing a sequence diagram with MIB and SI scheduling. The horizontal axis represents time.
  • the existing conventional MBSFN subframe configuration is reproduced below:
  • MBSFN-SubframeConfig :: SEQUENCE ⁇
  • radioframeAllocationPeriod ENUMERATED ⁇ n1 , n2, n4, n8, n16, n32 ⁇ ,
  • adding a bit string increases signaling load and adds unnecessary overhead because the need for the additional SI subframes may be sparse.
  • non-MBSFN subframes for SI broadcasting may be configured flexibly depending on the need of a particular network configuration. For example, according to certain embodiments, when a WD is in range of an access node in a MSBNSFN, the access node broadcasts towards the WD a subframe configuration for an MBMS network, the subframe configuration indicating additional non-MBMS subframes that include additional system information (SI), e.g. SI repetitions. This allows the WD to be informed it will receive additional SI in the yet-to-come non-MBMS subframes.
  • SI system information
  • the WD When the WD then receives a subframe, it determines, using the received subframe configuration, that the subframe is a non-MBMS subframe; and obtains the additional SI from the received subframe. This allows for extra SI to be sent flexibly to the WD, when needed, while preventing the loss of additional bandwidth dedicated to the extra SI when this extra SI is not needed.
  • a method in a WD where the method starts by receiving a subframe configuration for an MBMS network, the subframe configuration indicating non- MBMS subframes that include system information (SI). Then the WD receives a subframe and determines, using the received subframe configuration, that the subframe is a non-MBMS subframe, and obtains SI from the received subframe.
  • SI system information
  • a Wireless Device comprising a processing circuitry, the processing circuitry being operable to first receive a subframe configuration for an MBMS network, the subframe configuration indicating non-MBMS subframes that include system information (SI), then receive a subframe, and determine, using the received subframe configuration, that the subframe is a non-MBMS subframe, and to obtain SI from the received subframe.
  • SI system information
  • a Wireless Device that comprises a receiving module adapted to i) receive a subframe configuration for an MBMS network, the subframe configuration indicating non-MBMS subframes that include system information (SI); and ii) receive a subframe.
  • the WD further comprises a determining module adapted to determine, using the received subframe configuration, that the subframe is a non-MBMS subframe; and the WD further comprises an obtaining module adapted to obtain SI from the received subframe.
  • a method in a network node starting by obtaining a subframe configuration for an MBMS network, the subframe configuration indicating non-MBMS subframes that include system information (SI). The method then transmits the subframe configuration to a wireless device (WD); and transmits a non-MBMS subframe to the WD, the non-MBMS subframe comprising System Information (SI).
  • SI System Information
  • a network node comprising processing circuitry adapted to obtain a subframe configuration for an MBMS network, the subframe configuration indicating non-MBMS subframes that include system information (SI), to transmit the subframe configuration to a wireless device (WD); and to transmit a non-MBMS subframe to the WD, the non-MBMS subframe comprising System Information (SI).
  • SI system information
  • WD wireless device
  • SI System Information
  • a network node comprising an obtaining module adapted to obtain a subframe configuration for an MBMS, the subframe configuration indicating non-MBMS subframes that include system information (SI), and a transmitting module adapted to transmit the subframe configuration to a wireless device (WD), and to further transmit a non-MBMS subframe to the WD, the non-MBMS subframe comprising System Information (SI).
  • SI system information
  • the subframe configuration comprises scheduling information pointing to the one or more non-MBMS subframes comprising the SI.
  • the SI is additional SI provided by the access node in addition to the SI provided in the periodic CAS.
  • the non-MBMS subframes that include the SI are consecutive to other
  • the SI is comprised in one or more CAS.
  • the network is a Multimedia Broadcast Single Frequency Network (MBFSN) implementing a Further enhanced MBMS (FeMBMS) carrier.
  • MMFSN Multimedia Broadcast Single Frequency Network
  • FeMBMS Further enhanced MBMS
  • FIGURE 1 (Prior Art) is a sequence diagram illustrating MIB and SI scheduling
  • FIGURE 2 is a block diagram illustrating an example wireless network, according to a particular embodiment
  • FIGURE 3 is a flow diagram of an exemplary method in a wireless device, according to some embodiments.
  • FIGURE 4 is a flow diagram of an exemplary method in a network node, according to some embodiments.
  • FIGURE 5A is a block diagram illustrating an exemplary embodiment of a wireless device
  • FIGURE 5B is a block diagram illustrating exemplary components of a wireless device
  • FIGURE 6A is a block diagram illustrating an exemplary embodiment of a network node
  • FIGURE 6B is a block diagram illustrating exemplary components of a network node
  • FIGURE 7A and 7B are block diagrams illustrating an exemplary frame structure and resources scheduling according to certain embodiments.
  • Particular embodiments obviate the limitations of the prior art by providing configurability for additional subframes for transmission of SI or SI repetitions.
  • Particular embodiments may include a configurable non-MBSFN subframe allocation which flexibly allocates non-MBSFN subframes with additional SI in addition to the CAS subframes.
  • Particular embodiments provide configurability for subframes to carry additional SI or SI repetitions that may not fit in a single CAS subframe.
  • This may include a configurable non-MBSFN subframe allocation which flexibly allocates non-MBSFN subframes in addition to the CAS subframes.
  • the CAS periodicity may be 40 ms in some example embodiments, but in other embodiments may be any other number of ms.
  • the access node when a WD is in communication range of an access node in a MSBNSFN, the access node broadcasts to the WD a subframe configuration for an MBMS network, the subframe configuration indicating additional non-MBMS subframes that include system information (SI).
  • SI system information
  • the WD receives a subframe, it determines, using the received subframe configuration, that the subframe is a non-MBMS subframe; and obtains the additional SI from the received subframe.
  • the CAS periodicity may be 40 ms, but in other embodiments may be any number of ms.
  • the additional non-MBSFN subframes with the additional SI may be configured in consecutive subframes after a CAS, e.g. for better performance.
  • the additional non-MBMS subframes may not be immediately consecutive to the CAS.
  • the additional non-MBSFN subframes may be configured after every CAS, or after every second CAS, every fourth CAS, and so on.
  • an exemplary FeMBMS subframe configuration is provided below:
  • NonMBSFN-SubframeConfig :: SEQUENCE ⁇
  • radioFrameAllocationPeriodCas ENUMERATED ⁇ casl, cas2, cas4, cas8, cas16, cas32, cas64 ⁇ ,
  • NonMBSFN-SubframeConfig Particular fields of NonMBSFN-SubframeConfig may be described as follows.
  • Value n1 for radioframeAllocationPeriodCas denotes value 1
  • n2 denotes value 2, and so on.
  • subframeAllocationCas For subframeAllocationCas, it defines the subframes that are allocated for non-MBSFN within the radio frame allocation period defined by the radioFrameAllocationPeriodCas and the subFrameAllocationOffsetCas.
  • subframeAllocationAfterCas "1" denotes that the corresponding subframe is allocated for non-MBSFN. The following mapping applies.
  • the first/leftmost bit defines the non-MBSFN allocation for subframe #1 , the second bit for #2, third bit for #3, and so on.
  • casl cas2, cas3, cas4, cas5, cas6, cas7 ⁇ ;
  • sib-Mappinglnfo-r14 SIB-Mappinglnfo-CAS
  • si-Periodicity refers to the periodicity of the Sl-message in CAS periodicity, such that casl denotes 1 x Xms, cas2 denotes 2 x Xms, and so on, where X is CAS periodicity in ms.
  • LTE Long Term Evolution
  • FIG. 1 LTE is used throughout this disclosure as an exemplary cellular system, but the ideas presented herein may apply to other wireless communication systems as well.
  • FIGURE 2 is a block diagram illustrating an exemplary wireless network, according to a particular embodiment.
  • Wireless network 100 includes one or more wireless devices 110 (such as mobile phones, smart phones, laptop computers, tablet computers, MTC/M2M/IOT devices, User Equipment (UE), sensors, tablets, mobile terminals, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles, Customer Premises Equipment (CPE), or any other devices that can provide wireless communication) and a plurality of network nodes 120 (such as base stations or eNodeBs).
  • Network node 120 serves coverage area 115 (also referred to as cell 115).
  • wireless devices 110 that are within coverage of radio network node 120 (e.g., within cell 115 served by network node 120) communicate with radio network node 120 by transmitting and receiving wireless signals 130.
  • wireless devices 110 and radio network node 120 may communicate wireless signals 130 containing voice traffic, data traffic (e.g., broadcast video), and/or control signals.
  • a network node 120 communicating voice traffic, data traffic, and/or control signals to wireless device 110 may be referred to as a serving network node 120 for the wireless device 110.
  • Wireless signals 130 may include both downlink transmissions (from radio network node 120 to wireless devices 110) and uplink transmissions (from wireless devices 110 to radio network node 120).
  • network node 120 may include any type of network node such as a base station, radio base station, base transceiver station, base station controller, network controller, evolved Node B (eNB), Node B, multi-RAT base station, Multi-cell/multicast Coordination Entity (MCE), relay node, access point, radio access point, Remote Radio Unit (RRU) Remote Radio Head (RRH), a core network node (e.g., MME, SON node, a coordinating node, etc.), or even an external node (e.g., 3rd party node, a node external to the current network), etc.
  • a core network node e.g., MME, SON node, a coordinating node, etc.
  • an external node e.g., 3rd party node, a node external to the current network
  • Wireless network 100 may include an FeMBMS network.
  • wireless signals 130 may include an FeMBMS carrier.
  • a FeMBMS carrier may use almost all subframes for MBSFN, and may completely exclude unicast regions in the MBSFN subframes.
  • network node 120 may transmit the FeMBMS carrier with a periodic CAS.
  • the CAS may support PSS, SSS, CRS, PBCH, PDCCH, and PDSCH (e.g., for system information (SI)).
  • SI system information
  • Wireless device 110 may receive the FeMBMS carrier.
  • Each network node 120 may have a single transmitter or multiple transmitters for transmitting wireless signals 130 to wireless devices 110.
  • network node 120 may comprise a multi-input multi-output (MIMO) system.
  • each wireless device 110 may have a single receiver or multiple receivers for receiving signals 130 from network nodes 120.
  • MIMO multi-input multi-output
  • each radio network node 120 may use any suitable radio access technology, such as long term evolution (LTE), LTE-Advanced, NR, UMTS, HSPA, GSM, cdma2000, WiMax, WiFi, and/or other suitable radio access technology.
  • Wireless network 100 may include any suitable combination of one or more radio access technologies. For purposes of example, various embodiments may be described within the context of certain radio access technologies. However, the scope of the disclosure is not limited to the examples and other embodiments could use different radio access technologies.
  • embodiments of a wireless network may include one or more wireless devices and one or more different types of radio network nodes capable of communicating with the wireless devices.
  • the network may also include any additional elements suitable to support communication between wireless devices or between a wireless device and another communication device (such as a landline telephone).
  • a WD 110 may include any suitable combination of hardware and/or software.
  • FIGURE 3 is a flow diagram of an exemplary method implemented in a wireless device, according to some embodiments.
  • Method 300 begins at step 312, where WD 110 receives a subframe configuration for an MBMS network.
  • the subframe configuration is indicative of which subframes comprise non-MBMS (also referred to as non-MBSFN) subframes.
  • the subframe configuration may comprise an indication of the subframes that comprises the SI, and/or the CAS, which itself comprises the SI in an SIB.
  • the indication of the non-MBMS subframes may implicitly point out to the receiving WD that these frames contain further CAS and SI, as in many implementations non-MBMS subframes may only include CAS (with SI).
  • the subframe configuration may include an indication of the MBMS subframe including the additional CAS and an indication of the non-MBMS subframes including the SI.
  • the 2 indications may be different while in others they may be the same.
  • wireless device 110 may a receive a subframe configuration for a MBMS network from network node 120 according to any of embodiments described herein.
  • the subframe 702 may include a CAS 702 every 40 ms, which includes in turn the subframe configuration 701 according to present embodiments.
  • the subframe 704 after the CAS may be a non-MBMS subframe 704 that includes additional SI, e.g. an additional e.g. SIB, such as for example SIB15.
  • Figure 7B shows resources scheduling according to certain embodiments.
  • the CAS 702 is broadcasted by the access node towards WDs in its coverage with a certain periodicity 710, within certain SI windows 712, which are known to the WDs.
  • Embodiments herein allow for the subframe configuration 701 to inform the WDs that additional resources (e.g. non-MBMS subframes 704) provide for additional SI, when this is needed.
  • additional resources e.g. non-MBMS subframes 704
  • Such non-MBMS subframes may be consecutive to the CAS subframes, or be placed at other locations in the window.
  • the subframe configuration tells the WDs where to expect non-MBMS subframes 704 with the additional SI.
  • the SI periodicity further informs the WDs of the scheduling to be used to listen for the non-MBMS subframes 704 sent by the access node.
  • the WD is provided with an indication of the non-MBMS subframes and with another indication of the scheduling periodicity of the SI.
  • the wireless device 110 receives a subframe.
  • wireless device 110 may receive a subframe from network node 120 according to any of the embodiments described herein.
  • the subframe may be a MBMS subframe or a non-MBMS subframe.
  • the wireless device determines, using the received subframe configuration 701 , that the subframe is a non-MBMS subframe. For example, WD 110 may determine the received subframe is a non-MBMS subframe based on the received configuration and, for example, comparing a system frame number of the received subframe with the received configuration.
  • the wireless device obtains at least one of MIB or SIB from the received subframe.
  • wireless device 110 may obtain SIB15 from the received subframe.
  • FIGURE 4 is a flow diagram of an exemplary method in a network node 120, according to some embodiments.
  • Method 400 begins at step 410, where a network node 120 obtains a subframe configuration for an MBMS network.
  • the subframe configuration indicates non-MBMS subframes that include additional system information (SI) for the WD.
  • SI system information
  • the subframe configuration may comprise an indication of the subframes that comprises the CAS, which itself comprises the SI in an SIB.
  • the indication of the non-MBMS subframes may implicitly point out to the receiving WD that these frames contain further CAS and SI, as in many implementations non-MBMS subframes may only include CAS (with SI).
  • the subframe configuration may include an indication of the non-MBMS subframes including the additional CAS and an indication of the non-MBMS subframes including the SIB.
  • the 2 indications may be different while in others they may be the same
  • the network node 120 may create the subframe configuration itself, while in other embodiments it may receive the configuration from another element of the network.
  • the network node 120 broadcasts the subframe configuration to the WD 110.
  • the network node 120 transmits a periodical and fixed non-MBMS CAS subframe to the wireless device 110.
  • the subframe includes SI, e.g. an SIB or an MIB as shown in Figure 7A.
  • the network node transmits a non-MBMS subframe that includes additional SI, e.g. an SIB, to the wireless device 110, as per the embodiments described herein.
  • a non-MBMS subframe that includes additional SI, e.g. an SIB
  • network node 120 may broadcast a non-MBMS subframe that includes SIB15 to wireless device 110.
  • FIGURE 5A is a block diagram illustrating an exemplary embodiment of a WD 110.
  • WD 110 include a mobile phone, a smart phone, a PDA (Personal Digital Assistant), a portable computer (e.g., laptop, tablet), a sensor, a modem, a machine type (MTC) device / machine to machine (M2M) device, laptop embedded equipment (LEE), laptop mounted equipment (LME), USB dongles, a device-to-device capable device, a NB-loT device, or any other device that can provide wireless communication.
  • the wireless device 110 includes processing circuitry 500, that is operable to receive a subframe configuration for the MBMS network indicating non-MBMS subframes that include system information (SI).
  • SI system information
  • the circuitry is further operable to receive a subframe, determine, using the received subframe configuration, that the subframe is a non-MBMS subframe; and to obtain SI from the received subframe, as described hereinbefore.
  • the processing circuitry 500 includes a transceiver 510, a processor 520, and a memory 530.
  • transceiver 510 facilitates transmitting wireless signals to and receiving wireless signals from wireless network node 120 (e.g., via an antenna)
  • processor 520 executes instructions to provide some or all of the functionality described herein as provided by the wireless device 110
  • memory 530 stores the instructions executed by processor 520.
  • Processor 520 includes any suitable combination of hardware and software implemented in one or more integrated circuits or modules to execute instructions and manipulate data to perform some or all of the described functions of the wireless device 110.
  • processor 520 may include, for example, one or more computers, one more programmable logic devices, one or more central processing units (CPUs), one or more microprocessors, one or more applications, and/or other logic, and/or any suitable combination of the preceding.
  • Processor 520 may include analog and/or digital circuitry configured to perform some or all of the described functions of wireless device 110.
  • processor 520 may include resistors, capacitors, inductors, transistors, diodes, and/or any other suitable circuit components.
  • Memory 530 is generally operable to store computer executable code and data.
  • Examples of memory 530 include computer memory (e.g., Random Access Memory (RAM) or Read Only Memory (ROM)), mass storage media (e.g., a hard disk), removable storage media (e.g., a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or or any other volatile or non-volatile, non-transitory computer-readable and/or computer-executable memory devices that store information.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • mass storage media e.g., a hard disk
  • removable storage media e.g., a Compact Disk (CD) or a Digital Video Disk (DVD)
  • CD Compact Disk
  • DVD Digital Video Disk
  • processor 520 in communication with transceiver 510 communicates a subframe configuration for an MBMS network with radio network node 120.
  • the subframes may be configured according to any of the embodiments described herein.
  • Other embodiments of the wireless device may include additional components (beyond those shown in FIGURE 5A) responsible for providing certain aspects of the wireless device's functionality, including any of the functionality described above and/or any additional functionality (including any functionality necessary to support the solution described above).
  • FIGURE 5B is a block diagram illustrating exemplary components of a wireless device 110 according to another embodiment.
  • the components may include receiving module 550, determining module 552, and obtaining module 554.
  • Receiving module 550 may perform the receiving functions of wireless device 110. For example, receiving module 550 may receive a subframe configuration according to any of the embodiments described herein. In certain embodiments, receiving module 550 may include or be included in processor 520. In particular embodiments, receiving module 550 may communicate with determining module 552 and obtaining module 556.
  • Determining module 552 may perform the determining functions of wireless device 110. For example, determining module 552 may determine whether a subframe is an MBMS subframe or a non- MBMS subframe. In certain embodiments, determining module 552 may include or be included in processor 520. In particular embodiments, determining module 552 may communicate with receiving module 550 and obtaining module 556.
  • Obtaining module 554 may perform the obtaining functions of wireless device 110. For example, obtaining module 554 may obtain additional SI, e.g. the MIB or SIB information from a subframe. In certain embodiments, obtaining module 554 may include or be included in processor 520. In particular embodiments, obtaining module 554 may communicate with receiving module 550 and determining module 552.
  • additional SI e.g. the MIB or SIB information from a subframe.
  • obtaining module 554 may include or be included in processor 520.
  • obtaining module 554 may communicate with receiving module 550 and determining module 552.
  • FIGURE 6A is a block diagram illustrating an example embodiment of a network node.
  • Network node 120 can be, for example, an eNodeB, a nodeB, a base station, a wireless access point (e.g., a Wi- Fi access point), a low power node, a base transceiver station (BTS), a transmission point or node, a remote RF unit (RRU), a remote radio head (RRH), or other radio access node.
  • Network node 120 includes processing circuitry 600.
  • Processing circuitry 600 may include at least one transceiver 610, at least one processor 620, at least one memory 630, and at least one network interface 640.
  • Transceiver 610 facilitates transmitting wireless signals to and receiving wireless signals from a wireless device, such as wireless devices 110 (e.g., via an antenna); processor 620 executes instructions to provide some or all of the functionality described above as being provided by a network node 120.
  • the processing circuitry 600 may be adapted to obtain a subframe configuration (i.e. for example, either to read it from a storage, create it, or obtain it from another node) for an MBMS network, the subframe configuration indicating non-MBMS subframes that include system information (SI), to transmit the subframe configuration to the WD 110 and to further transmit one or more non-MBMS subframes to the WD 110, the non-MBMS subframe comprising System Information (SI).
  • SI System Information
  • the memory 630 stores the instructions executed by processor 620, and network interface 640 communicates signals to backend network components, such as a gateway, switch, router, Internet, Public Switched Telephone Network (PSTN), controller, and/or other network nodes 120.
  • backend network components such as a gateway, switch, router, Internet, Public Switched Telephone Network (PSTN), controller, and/or other network nodes 120.
  • PSTN Public Switched Telephone Network
  • Processor 620 and memory 630 can be of the same types as described with respect to processor 520 and memory 530 of FIGURE 5A above.
  • network interface 640 is communicatively coupled to processor 620 and refers to any suitable device operable to receive input for network node 120, send output from network node 120, perform suitable processing of the input or output or both, communicate to other devices, or any combination of the preceding.
  • Network interface 640 includes appropriate hardware (e.g., port, modem, network interface card, etc.) and software, including protocol conversion and data processing capabilities, to communicate through a network.
  • network node 120 include additional components (beyond those shown in FIGURE 6A) responsible for providing certain aspects of the network node's functionality, including any of the functionality described above and/or any additional functionality (including any functionality necessary to support the solution described above).
  • the various different types of radio network nodes may include components having the same physical hardware but configured (e.g., via programming) to support different radio access technologies, or may represent partly or entirely different physical components.
  • FIGURE 6B is a block diagram illustrating example components of a network node 120 according to further embodiments of the invention.
  • the components may include an obtaining module 650 and a transmitting module 652.
  • Obtaining module 650 may perform the obtaining functions of network node 120.
  • obtaining module 650 may obtain a subframe configuration according to any of the embodiments described herein.
  • obtaining module 650 may be adapted to obtain a subframe configuration for an MBMS network, the subframe configuration indicating non-MBMS subframes that include system information (SI).
  • SI system information
  • the obtaining module may include or be included in processor 620.
  • obtaining module 650 may communicate with transmitting module 652.
  • Transmitting module 652 may perform the sending functions of network node 120. For example, transmitting module 652 may transmit subframes and subframe configurations to wireless device 110 according to any of the embodiments described herein. In certain embodiments, transmitting module 652 is adapted to transmit the subframe configuration to the WD 110 and to further transmit a non-MBMS subframe to the WD, the non-MBMS subframe comprising System Information (SI). The transmitting module 652 may include or be included in processor 620. In particular embodiments, sending module 652 may communicate with obtaining module 650.
  • SI System Information
  • non-MBSFN subframes for SI broadcasting may be configured flexibly depending on the need of a particular network configuration. For example, when additional SI needs to be transmitted to one or more WDs, the subframe configuration transmitted from the access node informs the WDs to expect additional SI on certain subframes. In this manner, bandwidth is only used for the additional SI when needed, and not otherwise.

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

Abstract

L'invention concerne, lorsqu'un dispositif sans fil (WD) se situe dans une plage de diffusion d'un nœud d'accès dans un service de diffusion et de multidiffusion multimédia – réseau monofréquence (MBSFN), dans une certaine configuration de réseau, le nœud d'accès qui doit envoyer des informations de système (SI) supplémentaires. Selon des modes de réalisation, le nœud d'accès diffuse vers le WD une configuration de sous-trame pour le réseau, la configuration de sous-trame indiquant que des sous-trames non MBMS supplémentaires comprenant des informations de système (SI) doivent être attendues. Ainsi, le WD peut être informé qu'il doit recevoir des SI supplémentaires dans les sous-trames non MBMS à venir. Lorsque le WD reçoit par la suite une sous-trame, il détermine, à l'aide de la configuration de sous-trame reçue, que la sous-trame est une sous-trame non MBMS ; et obtient les SI supplémentaires en provenance de la sous-trame reçue. Ainsi, des SI supplémentaires peuvent être envoyées de manière flexible au WD si nécessaire tout en empêchant la perte de bande passante supplémentaire dédiée aux SI supplémentaires lorsque lesdites SI supplémentaires ne sont pas nécessaires.
PCT/IB2017/056936 2016-11-04 2017-11-06 Configuration de sous-trames non-mbms (services de diffusion et de multidiffusion multimédia) pour des informations de système supplémentaires WO2018083678A1 (fr)

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