WO2013159620A1 - 一种下行数据传输方法及装置 - Google Patents

一种下行数据传输方法及装置 Download PDF

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Publication number
WO2013159620A1
WO2013159620A1 PCT/CN2013/073128 CN2013073128W WO2013159620A1 WO 2013159620 A1 WO2013159620 A1 WO 2013159620A1 CN 2013073128 W CN2013073128 W CN 2013073128W WO 2013159620 A1 WO2013159620 A1 WO 2013159620A1
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Prior art keywords
downlink data
data transmission
message
user terminal
group
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PCT/CN2013/073128
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English (en)
French (fr)
Inventor
陈东
张英
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Priority to EP13781566.8A priority Critical patent/EP2844010A4/en
Priority to US14/397,642 priority patent/US9516669B2/en
Publication of WO2013159620A1 publication Critical patent/WO2013159620A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • H04W72/1263Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W68/00User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02Arrangements for increasing efficiency of notification or paging channel
    • H04W68/025Indirect paging
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • M2M communication refers to the communication between machine and machine. Unlike traditional H2H communication, M2M can automatically collect, process and transmit data without manual intervention. An important feature of M2M communication is that there are many user terminals. The number of Machine Type Communication (MTC) terminals is much larger than that of H2H user terminals, which is usually several times that of H2H user terminals.
  • MTC Machine Type Communication
  • the M2M mode has been applied to many fields, for example, 7J table statistics, meter statistics, gas meter statistics, hydrological monitoring, etc.
  • These user terminals belong to the same user, for example, meters belonging to the same power company, belonging to the same water company. Water meters, etc., or are densely distributed within an area, for example, hydrological monitoring.
  • a user needs to send public information to a certain user terminal belonging to the user, or some user terminal belonging to the user in a certain area, if paging is performed on each user terminal belonging to the user, or Each user terminal belonging to the user sends the same content information, which will cause a certain amount of waste on the network resources.
  • the data transmission channel is a shared channel, and the uplink and downlink data transmission of the user terminal is implemented based on scheduling.
  • the user terminal needs to be addressed.
  • the user terminal addressing is mainly addressed by using a 16-bit Radio Network Temporary Identifier (RNTI).
  • RNTI has many different types for different purposes. Common ones are: Paging Radio Network Temporary Identifier (P-RNTI), which is mainly used for paging when paging messages; System Message Wireless Network Temporary The System Information Radio Network Temporary Identifier (SI-RNTI) is mainly used to schedule system message addressing.
  • SI-RNTI System Information Radio Network Temporary Identifier
  • the Cell Radio Network Temporary Identifier is mainly used to dynamically schedule user data. Time search Address.
  • the user terminal can receive a paging message and a system message, and both the paging message and the system message are broadcast.
  • the paging message and the system message are all transmitted through scheduling, that is, the network side firstly transmits and transmits the paging message through the Physical Downlink Control Channel (PDCCH) before sending the paging message and the system message.
  • the physical resource of the system message that is, the Physical Downlink Shared Channel (PDSCH) resource.
  • the network side scrambles the PDCCH through the P-RNTI; for the system message, the network side scrambles the PDCCH through the SI-RNTI.
  • the user terminal uses the P-RNTI corresponding to the paging message and the SI-RNTI corresponding to the system message to descramble the PDCCH, so that the scheduling information carried by the PDCCH is correctly solved.
  • the user terminal receives the paging message or the system message at the indicated physical resource location according to the scheduling information carried on the PDCCH.
  • the user terminal receives discontinuous reception according to a certain period in an idle state.
  • the Discontinuous Reception (DRX) form listens to the paging message, that is, wakes up at regular intervals to listen to the P-RNTI scrambled PDCCH scheduled paging message at a fixed location.
  • the period of listening to the scheduled paging message is called the Paging DRX cycle, and the timing of listening to the scheduled paging message is called Paging Occasion (PO).
  • Paging DRX cycle The period of listening to the scheduled paging message
  • Paging Occasion (PO) Paging Occasion
  • the formula for calculating the system frame number (SFN) of the user terminal is:
  • SFN mod T (T div N)*(UE_ID mod N) (Formula 1) where SFN is the radio frame position number at which the PO is located, T is the Paging DRX cycle, N is determined by the network side configuration, and UE_ID is the user terminal.
  • IMSI International Mobile Subscriber Identity
  • the network side calculates the number of the radio frame position of each user terminal to listen to the paging message according to formula 1, and calculates a specific subframe for each user terminal to listen to the scheduling of the paging message by the network side according to formula 2, Therefore, when the network side needs to send a paging message to the user terminal, the paging message of the user terminal may be scheduled at the location where the subframe is located.
  • Equation 1 and Equation 2 different user terminals may have different numbers of specific subframes in which POs calculated using different UE_IDs are different, but if different user terminals use the same UE_ID, the calculated POs are located.
  • the specific subframe number is definitely the same.
  • HSDPA High Speed Downlink Packet Access
  • HSUPA High Speed Uplink Packet Access
  • HSDPA Used for downlink data transmission, HSUPA is used for uplink data transmission.
  • HSDPA uses downlink-based data transmission for scheduling. It mainly includes two physical channels: High Speed Shared Control Channel (HS-SCCH) and High Speed Physical Downlink Shared Channel.
  • HS-SCSCH is used for scheduling, and carries the physical resources allocated for data transmission allocated by the network side, that is, HS-PDSCH resources, and the HS-PDSCH is specifically used for carrying data.
  • HS-SCCH uses high-speed downlink sharing.
  • High Speed Downlink Shared Channel Radio Network Temporary Identifier (H-RNTI) is scrambled.
  • H-RNTI is assigned by Radio Network Controller (RNC).
  • RNC Radio Network Controller
  • Each user terminal is entering the connection.
  • an H-RNTI is allocated by the RNC.
  • the user terminal uses the allocated H-RNTI to listen to the HS-SCCH. If the HS-SCCH is correctly descrambled, it can be received at the physical resource allocated by the network side. The data sent by the network side to itself.
  • the user terminal In the UMTS system, the user terminal also listens to the paging message in the DRX form in the idle state. However, the paging message transmission mechanism of the UMTS system is different from the paging message transmission mechanism of the LTE system.
  • a user terminal In a UMTS system, a user terminal needs to receive a Paging Indicator Channel (PICH) in the form of DRX.
  • PICH Paging Indicator Channel
  • J PI corresponds to 4, 8 or 16 consecutive bits.
  • N PIB 352 bits in the burst of the PICH are used to carry the paging indication.
  • the user terminal reads the paging indicator factor PI at the corresponding location, if the PI bit is full
  • 1 ⁇ 1, 1, 1.., 1 ⁇ means that the user terminal is required to receive the paging subchannel in the block after receiving the PICH channel to determine whether the paging message contains a page for the user terminal. Conversely, it is not necessary to receive subsequent paging messages.
  • the user terminal finds that it is being paged, it receives the paging on the selected physical resource, the Secondary Common Control Physical Channel (SCCPCH), at a fixed time interval (Ngap, the network side configures the value).
  • SCCPCH Secondary Common Control Physical Channel
  • the user terminal when the user terminal listens to its own paging message in an idle state, You also need to choose the resources you need to use in your public resources based on your IMSI. If a group of user terminals use the same identity, then the same message can be heard at the same time.
  • the manner of transmitting data to a group consisting of at least one user terminal includes: a system message broadcast, a paging message.
  • System message broadcast data transmission mode system message belongs to all user terminals of the same user to transmit data information, and is not suitable for transmitting data information to a certain group of user terminals; paging message data transmission mode, because of the limited resources it carries, and if When the data transmission mode carries more data, it affects the normal user terminal, and in particular, it affects the normal edge user terminal to receive the normal paging message.
  • Embodiments of the present invention provide a downlink data transmission method and apparatus, which are used to reduce network resource waste when a network side transmits data to a group of user terminals, and improve network resource utilization.
  • a downlink data transmission method includes:
  • a downlink data transmission method includes:
  • a first transmission unit configured to send downlink data transmission scheduling information to the user equipment
  • An acquiring unit configured to obtain a corresponding time for sending the first message, where the first message is used to instruct the terminal side to receive downlink data;
  • a second transmission unit configured to send a first message to the user terminal at the timing
  • the third transmission unit is configured to transmit downlink data to the user terminal according to the downlink data transmission scheduling information.
  • a downlink data transmission device includes:
  • a first communication unit configured to receive downlink data transmission scheduling information sent by the network side
  • An acquiring unit configured to obtain a corresponding time for receiving the first message, where the first message is used to instruct the terminal side to receive downlink data
  • a second communication unit configured to receive, at the timing, a first message sent by the network side
  • the third communication unit is configured to receive downlink data transmitted by the network side according to the downlink data transmission scheduling information.
  • the user terminals that belong to the same user or are relatively densely distributed within a region are grouped into groups.
  • the user terminal In addition to using the UE_ID of the user terminal to listen to the paging message sent by the user terminal according to the formula 1 and formula 2 introduced in the background, the user terminal also needs to use the group ID of the group to which the user belongs or its own UE ID, according to Equations 1 and 2 introduced in the background art monitor the first message transmitted for the home terminal belonging group.
  • FIG. 1 is a schematic diagram of a system operating environment in an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a network side according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a function of a user terminal according to an embodiment of the present invention.
  • FIG. 4A is a detailed flowchart of a first group-based downlink data transmission for an LTE system according to an embodiment of the present invention
  • FIG. 4B is a schematic diagram of a first group-based downlink data transmission for an LTE system according to an embodiment of the present invention
  • 5A is a detailed flowchart of a first group-based downlink data transmission for a UMTS system according to an embodiment of the present invention
  • FIG. 5B is a schematic diagram of a first group-based downlink data transmission for a UMTS system according to an embodiment of the present invention
  • FIG. 6A is a detailed flowchart of a second group-based downlink data transmission for an LTE system according to an embodiment of the present invention
  • 6B is a schematic diagram of a second group-based downlink data transmission for an LTE system according to an embodiment of the present invention
  • FIG. 7A is a detailed flowchart of a second group-based downlink data transmission for a UMTS system according to an embodiment of the present invention
  • FIG. 7B is a schematic diagram of a second group-based downlink data transmission for a UMTS system according to an embodiment of the present invention.
  • the embodiments of the present invention provide a downlink data transmission method, which is composed of user terminals that belong to the same user or are relatively densely distributed within a region, in order to reduce network resource waste in M2M communication and improve network resource utilization.
  • the group is uniquely identified by a group ID for each group, and the user terminal still listens to the first message in the idle state.
  • the first message may be a paging message or a control channel message, where the control channel may be a PDCCH. , can also be HS-SCCH.
  • the user terminal uses the UE_ID of its own according to the publicity described in the background art. Equation 1 and Equation 2, in addition to listening to the paging message for itself, also need to use the Group ID of the user terminal belonging group, and listen to the first message sent by the user terminal home group according to formula 1 and formula 2 introduced in the background art
  • the network side sends the first message to the user terminal through the set physical resource at the timing corresponding to the first message. If the first message is a paging message, the network side carries the Group ID of the belonging group of the user terminal in the paging message, or And carrying a group ID of the user terminal belonging group and a downlink data transmission indication (data-flag); if the first message is a control channel message, the network side carries the Group ID of the user terminal belonging group in the control channel message, where the network The side can be a base station or an RNC.
  • the group user terminal when the network side transmits downlink data to a group of user terminals, the group user terminal is paged at the paging occasion of the group, and the paging message carries the group ID of the group to notify all the groups.
  • the user terminal receiving the paging message can receive downlink data to a fixed physical resource location within a fixed duration (ie, a time window, also called a time window), and change the behavior of the user terminal, so that the user terminal does not need to enter the radio resource control (Radio Resource Control, RRC)
  • RRC Radio Resource Control
  • the connection status receives the downlink scheduling resources allocated by the network side.
  • the network side can transmit the same data multiple times within a fixed period of time to ensure the reliability of downlink data transmission.
  • the fixed duration, fixed physical resources, and downlink data transmission interval can be broadcast through system messages or through RRC messages. This set of parameters is available to all user terminals in all groups.
  • This fixed physical resource can be scheduled by the network side to be used by other user terminals when there is no downlink group data transmission. Once there is group data transmission, the network side does not schedule the fixed physical resource to be used by other user terminals during data transmission. .
  • the network side sends the fixed duration, the fixed physical resource, and the downlink data transmission interval through the RRC message.
  • the network side sends a fixed duration, a fixed physical resource, and a downlink data transmission interval by using an RRC message.
  • the user terminal saves the received fixed duration, fixed physical resources, and downlink data transmission interval.
  • the downlink scheduling resource allocated by the network side may be received according to the saved information.
  • the user terminal listens to the group paging occasion according to the foregoing method in the idle state, and when the network side transmits the downlink data to the group of user terminals, the group paging time carries the group ID to notify all users in the group. terminal.
  • the paging message carries the C-RNTI corresponding to the group (network-side dynamic allocation, same as normal C-RNTI) or H-RNTK RNC allocation).
  • the user terminal receiving the paging message can listen to the HS-SCCH scrambled by the received C-RNTI scrambled PDCCH or H-RNTI for a fixed period of time. After the timeout expires, the C-RNTI or H-RNTI is released.
  • This duration can be sent through system messages or through RRC messages. All user terminals in all groups are the same. After listening to the corresponding C-RNTI scrambled PDCCH or the corresponding H-RNTI scrambled HS-SCCH, the user terminal receives downlink data at the PDCCH or HS-SCCH scheduled physical resource location.
  • the embodiment of the present invention provides another downlink data transmission method, which is a group of user terminals that belong to the same user or are relatively densely distributed within a region.
  • the user terminal still listens to the first message in an idle state, and the first message may be a paging message, or So the control channel message.
  • the control channel may be a PDCCH or an HS-SCCH.
  • the user terminal needs to use its own UE_ID to listen to the message according to Equation 1 and Equation 2 introduced in the background art, so as to acquire the first message sent for the home terminal belonging group.
  • the network side sends the first message to the user terminal through the set physical resource at the timing corresponding to the first message. If the first message is the paging message, the network side carries the UE ID of the user terminal and the downlink data transmission in the paging message. If the first message is a control channel message, the network side carries the UE ID of the user terminal in the control channel message, where the network side may be a base station or an RNC.
  • the group of user terminals is paged at the paging occasion of the group.
  • the paging occasions of the groups may be different for different user terminals in the group.
  • the paging message sent to each user terminal in the group carries the UE ID of the user terminal and a downlink data transmission indication to notify the user terminal.
  • the user terminal receiving the paging message can receive downlink data to a fixed physical resource location within a fixed duration (ie, a time window, also called a time window), change the behavior of the user terminal, and prevent the user terminal from entering the RRC connection state receiving network.
  • the downlink scheduling resource allocated on the side ie, a time window, also called a time window
  • the network side can transmit the same data multiple times within a fixed period of time to ensure the reliability of downlink data transmission.
  • the fixed duration, fixed physical resources, and downlink data transmission interval can be broadcast through system messages or through RRC messages. This set of parameters is available to all user terminals in the group.
  • This fixed physical resource can be scheduled by the network side to be used by other user terminals when there is no downlink group data transmission. Once there is group data transmission, the network side does not schedule the fixed physical resource to be used by other user terminals during data transmission. .
  • system side broadcast system information such as a System Information Broadcast (SIB) message
  • SIB System Information Broadcast
  • the system running environment includes a network side and a thousand user terminals, wherein, as shown in FIG. 2, in the embodiment of the present invention, the network side includes a first transmission unit 10 and an acquisition unit 11 a second transmission unit 12, a third transmission unit 13, wherein
  • the first transmission unit 10 is configured to send downlink data transmission scheduling information to the user equipment;
  • the obtaining unit 11 is configured to obtain a corresponding time for sending the first message, where the first message is used to instruct the terminal side to receive downlink data;
  • a second transmission unit 12 configured to send a first message to the user terminal at the timing
  • the third transmission unit 13 is configured to transmit downlink data to the user terminal according to the downlink data transmission scheduling information.
  • the user terminal includes a first communication unit 20, an obtaining unit 21, a second communication unit 22, and a third communication unit 23, where
  • the first communication unit 20 is configured to receive downlink data transmission scheduling information sent by the network side;
  • the obtaining unit 21 is configured to obtain a corresponding timing for receiving the first message, where the first message is used to indicate that the terminal is connected Receiving downlink data;
  • a second communication unit 22 configured to receive, at the timing, a first message sent by the network side
  • the third communication unit 23 is configured to receive downlink data transmitted by the network side according to the downlink data transmission scheduling information.
  • the above system architecture as shown in FIG. 4A, in the embodiment of the present invention, one of the detailed processes of group-based downlink data transmission for the LTE system is as follows:
  • Step 200 The base station broadcasts the group-based downlink data transmission scheduling information by using the SIB message, where the downlink data transmission scheduling information carries at least the resource indication that the user terminal uses to receive the downlink data.
  • the base station can also send the group-based downlink data transmission scheduling information by using the RRC message.
  • the SIB message in broadcast form is taken as an example.
  • the specific content of the downlink data transmission scheduling information may include: a duration in which the user terminal in the group receives the downlink data transmitted by the base station (that is, a time window, also called a time window), a physical resource that receives downlink data transmitted by the base station, and a downlink data transmission interval. Further, it may further include receiving a subframe offset of the downlink data transmitted by the base station.
  • the duration of the downlink data transmitted by the base station that is, the downlink data transmission duration indicated in the downlink data transmission scheduling information.
  • the subframe position determined by the subframe offset of the downlink data transmitted by the base station that is, the location of the starting subframe carrying the downlink data transmission.
  • SIB message In the embodiment of the present invention, the specific form of the SIB message may be as follows:
  • Step 210 In the idle state, the user terminal needs to use the UE ID to listen to its own paging message, and also needs to calculate the paging occasion of the home group of the user terminal by using the group ID of the home terminal belonging group.
  • the paging occasion of the user terminal belonging to the group that is, the timing of sending/receiving the paging message.
  • the formula for calculating the radio frame position number of the paging moment of the home group by the user terminal is:
  • SFN mod T (T div N)*(Group ID mod N) (Formula 6)
  • SFN is the radio frame position number of the paging occasion of the belonging group
  • T is the Paging DRX cycle
  • N is determined by the base station configuration.
  • the group ID is the identifier of the home terminal belonging to the user terminal.
  • the user terminal can calculate, according to formula 6, the timing at which the user terminal belongs to the group to listen to the scheduled paging message.
  • i_s is the user terminal attribution
  • N and Ns are determined by the configuration of the base station.
  • the group ID of the user terminal belonging group is set in the card of the user terminal, and the card may be a Subscriber Identity Module (SIM) card or a Universal Subscriber Identity Module (USIM) card.
  • SIM Subscriber Identity Module
  • USIM Universal Subscriber Identity Module
  • the paging occasion of the listening home group can be calculated according to the group ID of the home terminal belonging group, and the paging occasion of the monitoring home group can be calculated according to the user terminal identifier (UE ID).
  • UE ID user terminal identifier
  • the user terminal calculates the paging occasion according to formula 1 and formula 2 introduced in the background art.
  • the paging occasion is the paging of the belonging group. opportunity.
  • the paging occasions of the belonging groups may be different for different user terminals in a group.
  • the base station calculates the paging occasion of the belonging group of the corresponding user terminal according to the formula 1 and formula 2 introduced in the background, respectively, for the user terminal identifier of each user terminal in a group.
  • Step 220 The user terminal receives the control signaling sent by the base station by using the PDCCH, where the control signaling carries the physical resource location that is sent by the base station to monitor the paging message.
  • the base station uses the P-RNTI to scramble the control signaling sent by the PDCCH. Since the P-RNTI is specified in the protocol, the user terminal can use the corresponding P-RNTI to solve the received control signaling according to the relevant protocol.
  • the physical resource location for the paging message sent by the base station is obtained.
  • Step 230 The user terminal receives the paging message sent by the base station at the physical resource location notified by the base station in the paging occasion corresponding to the home group.
  • the user terminal may periodically monitor the paging message at the physical resource location notified by the base station in the paging occasion corresponding to the home group, and the paging message carries the Group ID of the user terminal belonging group, or carries the user.
  • each paging message carries only one or a few Group IDs.
  • the specific form of the paging message may be as follows:
  • Paging-vb00-IEs:: SEQUENCE ⁇
  • PagingGroupRecord SEQUENCE ⁇
  • the base station can also notify the user terminal to start receiving the downlink data of the group through a special control channel.
  • the special control channel mentioned here may be a PDCCH, and the PDCCH carries a corresponding Group ID.
  • the paging occasion of the monitoring belonging group can also be calculated according to the user terminal identifier.
  • the paging occasion of the home group is monitored based on the user terminal identity. For the user terminal, it does not distinguish between the paging occasion of the home group and the paging occasion for itself.
  • step 220 is to calculate the paging occasion of the listening home group according to the user terminal identifier. Then, in a practical application, the user terminal may periodically monitor the paging message at the physical resource location notified by the base station in the paging occasion corresponding to the home group, and the paging message carries the UE ID of the user terminal and Downstream data transmission indication (data-flag).
  • Step 240 After listening to the corresponding paging message, the user terminal receives the downlink data transmitted by the base station according to the downlink data transmission scheduling information notified by the SIB message.
  • the user terminal detects that the paging message carries the group ID of the own home group, or the user terminal detects that the paging message carries the group ID of the own home group and the downlink data transmission indication (data-flag), To the next subframe of the paging message (may also be the next subframe + offset subframe), the downlink data transmission duration (ie time window, also called time window) notified by the SIB message, and the downlink
  • the data transmission interval repeats receiving downlink data transmitted by the base station at a fixed physical resource location notified by the SIB message.
  • the fixed physical resource location notified by the SIB message that is, the starting subframe position carrying the downlink data transmission, and the UE included in the downlink data transmission scheduling information receives the physical resource of the downlink data transmitted by the base station.
  • the location of the initial subframe that carries the downlink data transmission that is, the subframe position determined by the “subframe offset of the downlink data transmitted by the receiving base station” included in the downlink data transmission scheduling information in step 200.
  • the duration of receiving the downlink data is configured by the base station in the SIB message.
  • the base station transmits the downlink data of the group at the same physical resource as the user terminal of the group receiving the downlink data from the same time.
  • the base station may periodically transmit the downlink data repeatedly to ensure the reliability of downlink data transmission. If the duration expires, the base station stops transmitting downlink data, and the group of user terminals also stops receiving downlink data. If the paging message received by the user terminal includes its own UE_ID and the group ID of its own home group, the user terminal triggers the RRC connection establishment process and does not perform the downlink data receiving operation.
  • the base station transmits the downlink data to the user terminal according to the downlink data transmission duration indicated in the downlink data transmission scheduling information, the initial subframe position of the downlink data transmission, and the downlink data transmission interval.
  • the paging occasion of the monitoring belonging group can be calculated according to the user terminal identifier.
  • the step 220 is to calculate the paging occasion of the listening home group according to the user terminal identifier. Then, the step 240 is specifically: when the user terminal detects that the paging message carries its own UE ID and the downlink data transmission indication, the following formula (8) is used to determine the time when the data is started to be received, and the time point determined by the formula (8) is used.
  • the downlink data transmission duration ie, the time window, also called the time window
  • the downlink data transmission interval repeatedly receive the downlink data transmitted by the base station at the fixed physical resource location notified by the SIB message.
  • m is the length of time specified by the network side configuration or protocol, and the length of time is an integer multiple of the paging period, so that all user terminals in the home group receive the time.
  • the first SFN that satisfies the formula is the time of receiving data.
  • the duration of receiving the downlink data is configured by the base station in the SIB message.
  • the base station determines the time at which to start transmitting data according to the above formula (8), and transmits the downlink data of the group at the same physical resource as the user terminal of the group receiving the downlink data from the same time.
  • the base station may periodically transmit the downlink data repeatedly to ensure the reliability of downlink data transmission. If the duration expires, the base station stops transmitting downlink data, and the group of user terminals also stops receiving downlink data. If the paging message received by the user terminal includes its own UE_ID and the group ID of its own home group, the user terminal triggers the RRC connection establishment process and does not perform the downlink data receiving operation.
  • the base station determines, by using the above formula (8), the time when the data is started to be transmitted. At the time point determined by the formula (8), according to the downlink data transmission duration indicated in the downlink data transmission scheduling information, the initiator of the downlink data transmission is carried. The frame position, and the downlink data transmission interval, transmit downlink data to the user terminal.
  • the first group-based downlink data transmission diagram is shown in Figure 4B.
  • one of the detailed processes of group-based downlink data transmission for the UMTS system is as follows:
  • Step 300 The base station broadcasts the group-based downlink data transmission scheduling information by using the SIB message, where the downlink data transmission scheduling information carries at least the resource indication that the user terminal uses to receive the downlink data.
  • the base station can also send the group-based downlink data transmission scheduling information by using the RRC message.
  • the SIB message in broadcast form is taken as an example.
  • the specific content of the downlink data transmission scheduling information may include: receiving, by the user terminal in the group, the duration of the downlink data transmitted by the base station, receiving the physical resource of the downlink data transmitted by the base station, and the downlink data transmission interval, and further, The subframe offset of the downlink data.
  • the duration of the downlink data transmitted by the base station that is, the downlink data transmission duration indicated in the downlink data transmission scheduling information.
  • the subframe position determined by the subframe offset of the downlink data transmitted by the base station that is, the location of the initial subframe carrying the downlink data transmission.
  • the specific form of the SIB message may be as shown in Table 1:
  • Step 310 In the idle state, the user terminal needs to use the UE ID to listen to its own paging message, and also needs to calculate the paging occasion of the monitoring home group by using the group ID of the home terminal belonging group.
  • the user terminal calculates the radio frame position number SFN of the home group paging occasion according to formula 6.
  • the formula 7 determines, in particular, which subframe in the radio frame monitors the scheduling of the paging message by the base station.
  • the group ID of the user terminal belonging group is set in the card of the user terminal, and the card may be a SIM card or a USIM card, and the group ID of each group is uniquely determined.
  • the user terminal can also calculate the paging occasion of the home group by using the UE_ID.
  • the user terminal can also calculate the paging occasion of the home group by using the UE_ID.
  • Step 320 The user terminal receives control signaling sent by the base station through the PICH, where the control signaling carries an identifier indicating whether the user terminal is paged.
  • Step 330 The user terminal receives, in a paging occasion corresponding to the home group, a paging message sent by the base station at a predetermined physical resource location according to the notification of the base station.
  • the user terminal may periodically monitor the paging message at the predetermined physical resource location according to the notification of the base station in the paging occasion corresponding to the home group, and the paging message carries the Group ID of the belonging group of the user terminal. Or carrying the Group ID of the user terminal belonging group and the downlink data transmission indication (data-flag).
  • each paging message carries only one or a few Group IDs.
  • the specific form of the paging message may be as shown in Table 2:
  • the base station can also notify the user terminal to start receiving the downlink data of the group through a special control channel.
  • the special control channel mentioned here may be HS-SCCH, which carries the corresponding Group ID.
  • the paging message carries the UE ID of the user terminal and the downlink data transmission indication; if the user terminal passes its UE ID The paging moment of the listening home group is calculated, and the control channel is used, and the control channel carries the UE ID of the user terminal.
  • Step 340 After monitoring the corresponding paging message, the user terminal receives the downlink data transmitted by the base station according to the downlink data transmission scheduling information notified by the SIB message.
  • the user terminal detects that the paging message carries the group ID of the own home group, or the user terminal detects that the paging message carries the group ID of the own home group and the downlink data transmission indication (data-flag),
  • the next subframe of the paging message may also be the next subframe + offset subframe
  • the downlink data transmission duration notified by the SIB message may also be the next subframe + offset subframe
  • the downlink data transmission duration notified by the SIB message may also be the next subframe + offset subframe
  • the downlink data transmission duration notified by the SIB message
  • the downlink data transmission interval fixed in the SIB message notification
  • the physical resource of the downlink data transmitted by the base station is received by the UE included in the downlink data transmission scheduling information at the fixed physical resource location notified by the SIB message, that is, at the starting subframe position of the downlink data transmission.
  • the initial subframe position carrying the downlink data transmission that is, the subframe position determined according to the “subframe offset of the downlink
  • the duration of receiving the downlink data is configured by the base station in the SIB message.
  • the base station transmits the downlink data of the group at the same physical resource as the user terminal of the group receiving the downlink data from the same time.
  • the base station may periodically transmit the downlink data repeatedly to ensure the reliability of downlink data transmission. If the timeout expires, the base station stops transmitting. Row data, the group of user terminals also stop receiving downlink data. If the paging message received by the user terminal includes its own UE_ID and the group ID of its own home group, the user terminal triggers the RRC connection establishment process and does not perform the downlink data receiving operation.
  • the step 340 is specifically: when the user terminal detects that the paging message carries its own UE ID and the downlink data transmission indication, the following formula (8) is used to determine the time when the data is started to be received, and the time point determined by the formula (8) is used.
  • the downlink data transmission duration ie, the time window, also referred to as the time window
  • the downlink data transmission interval repeatedly receive the downlink data transmitted by the base station at the fixed physical resource location notified by the SIB message.
  • m is the length of time specified by the network side configuration or protocol, and the length of time is an integer multiple of the paging period.
  • the first group-based downlink data transmission diagram is shown in Figure 5B.
  • the detailed flow of the group-based downlink data transmission is as follows:
  • Step 400 The base station broadcasts the group-based downlink data transmission scheduling information by using the SIB message, where the downlink data transmission scheduling information carries at least the resource indication that the user terminal is used to receive the downlink data.
  • the base station can also send the group-based downlink data transmission scheduling information by using the RRC message.
  • the SIB message in broadcast form is taken as an example.
  • the specific content of the downlink data transmission scheduling information may include: a control channel listening duration of the user terminal in the group, and a physical resource location of the PDCCH scheduling the downlink data transmission, and further, may further include receiving a subframe of the downlink data transmitted by the base station. Offset.
  • Step 410 In the idle state, the user terminal needs to use the UE ID to listen to its own paging message, and also needs to calculate the paging occasion of the listening home group by using the group ID of the home terminal belonging group.
  • the user terminal calculates the radio frame position number SFN of the home group paging occasion according to formula 6.
  • the formula 7 determines, in particular, which subframe in the radio frame monitors the scheduling of the paging message by the base station.
  • the group ID of the user terminal belonging group is set in the card of the user terminal, and the card may be a SIM card or a USIM card, and the group ID of each group is uniquely determined.
  • Step 420 The user terminal receives the control signaling sent by the base station by using the PDCCH, where the control signaling carries the physical resource location that is sent by the base station to monitor the paging message.
  • the base station uses the P-RNTI to scramble the control signaling sent by the PDCCH. Since the P-RNTI is specified in the protocol, the user terminal can use the corresponding P-RNTI to solve the received control signaling according to the relevant protocol.
  • the physical resource location for the paging message sent by the base station is obtained. Step 430: The user terminal receives the paging message sent by the base station at the physical resource location notified by the base station in the paging occasion corresponding to the home group.
  • the user terminal may periodically monitor the paging message at the physical resource location notified by the base station in the paging occasion corresponding to the home group, and the paging message may not only carry the group ID of the group, but also The group ID and the downlink data transmission indication (data-flag) of the home terminal belonging to the user terminal are further carried, and further, the C-RNTI that notifies the user terminal to perform control channel addressing may also be carried.
  • the specific form of the paging message is as follows:
  • Paging-vxxx-IEs:: SEQUENCE ⁇
  • PagingGroupRecordList PagingGroupRecordList OPTIONAL, - Need ON nonCriticalExtension SEQUENCE ⁇ OPTIONAL Need OP
  • PagingGroupRecordList SEQUENCE (SIZE (L.maxPageGruop)) OF
  • PagingGroupRecord SEQUENCE ⁇
  • Step 440 After monitoring the corresponding paging message, the user terminal monitors the PDCCH for scheduling downlink data transmission according to the information carried in the paging message.
  • the base station scrambles the PDCCH by using the C-RNTI carried in the paging message in the process of scheduling the downlink data transmission to the user equipment through the PDCCH.
  • the user terminal detects that the paging message carries the Group ID of the group to which the group belongs, or when the paging message carries the Group ID of the own home group and the downlink data transmission indication (data-flag), the user terminal can receive the At the next subframe of the paging message (which may also be at the next subframe + offset subframe), according to the control channel listening duration (ie, time window, also called time window) notified by the SIB message,
  • the paging message carries the C-RNTI to monitor the PDCCH for scheduling the downlink data transmission, and uses the C-RNTI to descramble the corresponding PDCCH to obtain the downlink data scheduling mode, so as to receive the downlink data transmitted by the base station according to the downlink data scheduling manner.
  • the user terminal receives the paging message at the next subframe (may also be the next subframe + offset subframe), and the control channel listening duration according to the SIB message (ie, the time window, also called time) a window for monitoring a physical resource location of a control channel for scheduling downlink data transmission; wherein, the C-RNTI carried in the paging message is used to demodulate the PDCCH in the listening duration, and the demodulation is correct to indicate that it is scheduled for scheduling
  • Step 450 The user equipment receives downlink data transmitted by the base station according to scheduling of the PDCCH.
  • the scheduling of the PDCCH is the downlink data scheduling manner acquired as described above.
  • the user terminal releases the C-RNTI allocated by the base station after the control channel listening timeout expires.
  • the base station releases the C-RNTL after the control channel listening timeout expires.
  • the base station schedules downlink data transmission to the user terminal through the control channel according to the physical resource location indicated by the downlink data transmission scheduling information, within the control channel listening duration indicated by the downlink data transmission scheduling information;
  • the downlink data is transmitted to the user terminal according to the resource scheduled by the control channel.
  • the RNTI is carried in the paging message to notify the user terminal to perform control channel addressing, and in the process of scheduling downlink data transmission to the user terminal through the control channel, the corresponding RNTI pair is used.
  • the implementation of the control channel for scrambling is not limited to this, and the RNTI may be specified by a standard agreement or a pre-agreed by the base station and the user terminal, and the corresponding RNTI is used to control the downlink data transmission to the user terminal through the control channel. Channel scrambling.
  • the corresponding control channel can also be descrambled by using the specified RNTI.
  • the second group-based downlink data transmission diagram is shown in Figure 6B.
  • Step 500 The base station broadcasts the group-based downlink data transmission scheduling information by using the SIB message, where the downlink data transmission scheduling information carries at least the resource indication that the user terminal uses to receive the downlink data.
  • the base station can also send the group-based downlink data transmission scheduling information by using the RRC message.
  • the SIB message in broadcast form is taken as an example.
  • the specific content of the downlink data transmission scheduling information may include: a control channel listening duration of the user terminal in the group, and a physical resource location of the HS-SCCH that schedules the downlink data transmission, and further, may further include receiving downlink data transmitted by the base station. Subframe offset.
  • Step 510 In the idle state, the user terminal needs to monitor the paging occasion of the home group through the group ID of the home group of the user terminal, in addition to monitoring the paging message of the UE_ID.
  • the user terminal calculates the radio frame position number SFN of the home group paging occasion according to the formula 6.
  • the formula 7 determines, in particular, which subframe in the radio frame monitors the scheduling of the paging message by the base station.
  • the group ID of the user terminal belonging group is set in the card of the user terminal, and the card may be a SIM card or a USIM card, and the group ID of each group is uniquely determined.
  • Step 520 The user terminal receives control signaling sent by the base station through the PICH, where the control signaling carries an identifier indicating whether the user terminal is paged.
  • Step 530 The user terminal receives, at a paging occasion corresponding to the home group, a paging message sent by the base station at a predetermined physical resource location according to the notification of the base station.
  • the user terminal may periodically monitor the paging message at a predetermined physical resource location according to the notification of the base station in the paging occasion corresponding to the home group, and the paging message may not only carry the group ID of the group.
  • the group ID and the downlink data transmission indication (data-flag) of the group to which the user terminal belongs may also be carried.
  • the H-RNTI that notifies the user terminal to perform control channel addressing may also be carried.
  • Step 540 After monitoring the corresponding paging message, the user terminal monitors the HS-SCCH that schedules downlink data transmission according to the information carried in the paging message.
  • the base station scrambles the HS-SCCH by using the H-RNTI carried in the paging message.
  • the user terminal detects that the paging message carries the Group ID of the own home group, or when the paging message carries the Group ID of the own home group and the downlink data transmission indication (data-flag), the user terminal can receive the The next subframe of the paging message (which may also be the next subframe + offset subframe), according to the control channel listening duration notified by the SIB message, the paging message carries the H-RNTI to monitor the scheduled downlink data.
  • the HS-SCCH is transmitted, and the corresponding HS-SCCH is descrambled by using the H-RNTI to obtain a downlink data scheduler. And, in order to receive the downlink data transmitted by the base station according to the downlink data scheduling manner.
  • Step 550 The user terminal receives downlink data transmitted by the base station according to the scheduling of the HS-SCCH.
  • the scheduling of the HS-SCCH is the downlink data scheduling mode described above.
  • the user terminal releases the H-RNTI allocated by the base station after the control channel listening timeout expires. Similarly, the base station releases the H-RNTI after the control channel listening timeout expires.
  • the second group-based downlink data transmission diagram is shown in Figure 7B.
  • the working mode of the network side of the embodiment of the present invention is as follows.
  • the specific working mode of the embodiment of the present invention can be referred to the description of the method embodiment, and details are not described herein again.
  • the first transmission unit 10 transmits the downlink data transmission scheduling information to the user equipment by using a system message or a radio resource control RRC message.
  • the downlink data transmission scheduling information sent by the first transmission unit 10 is group-based downlink data transmission scheduling information, and the timing of sending the first message obtained by the acquiring unit is based on the network side architecture shown in FIG. The timing calculated according to the group identifier Group ID corresponding to the group.
  • the second transmission unit 12 when the second transmission unit 12 sends the first message to the user terminal at the timing, if the first message is a paging message, the second transmission unit 12 is The paging message carries the Group ID of the home group of the user terminal, or the Group ID and the downlink data transmission indication of the home group of the user terminal, and if the first message is a control channel message, the second transmission The unit 12 carries the Group ID of the home terminal belonging group in the control channel message.
  • the third transmission unit 13 transmits downlink data to the user terminal according to the downlink data transmission scheduling information, including:
  • the third transmission unit 13 transmits the downlink data to the user terminal according to the downlink data transmission duration indicated in the downlink data transmission scheduling information, the initial subframe position of the downlink data transmission, and the downlink data transmission interval.
  • the third transmission unit 13 transmits downlink data to the user terminal according to the downlink data transmission scheduling information, including:
  • the third transmission unit 13 schedules downlink data transmission to the user equipment through the control channel according to the physical resource location indicated by the downlink data transmission scheduling information, within the control channel listening duration indicated by the downlink data transmission scheduling information;
  • the downlink data is transmitted to the user terminal according to the resource scheduled by the control channel.
  • the second transmission unit 12 may perform downlink data transmission to the user terminal through the control channel. And using the RNTI to scramble the corresponding control channel.
  • the third transmission unit 13 may scramble the corresponding control channel by using a predetermined RNTI in the process of scheduling downlink data transmission to the user terminal through the control channel.
  • the downlink data transmission scheduling information is group-based downlink data transmission scheduling information
  • the timing of transmitting the first message is based on user terminal identifiers of the user terminal, based on the network side architecture shown in FIG. Calculate the timing.
  • the second transmission unit 12 when the second transmission unit 12 sends the first message to the user terminal at the timing, if the first message is a paging message, the second transmission unit 12 is The paging message carries the user terminal identifier of the user terminal and the downlink data transmission indication. If the first message is a control channel message, the second transmission unit 12 carries the user terminal in the control channel message. User terminal identifier.
  • the third transmission unit 13 transmits downlink data to the user terminal according to the downlink data transmission scheduling information, including:
  • the third transmission unit 13 determines the time at which to start transmitting data by using the following formula, and according to the time point determined by the following formula, according to the downlink data transmission duration indicated in the downlink data transmission scheduling information, carrying the initial subframe position of the downlink data transmission, and Downlink data transmission interval, transmitting downlink data to the user terminal;
  • m is the length of time, which is an integer multiple of the paging period.
  • each functional module of the user terminal in the embodiment of the present invention is as follows.
  • the specific working mode can be referred to the description of the method embodiment, and details are not described herein again.
  • the first communication unit 20 preferably receives the downlink data transmission scheduling information sent by the network side by using a system message or a radio resource control RRC message.
  • the downlink data transmission scheduling information received by the first communication unit 20 is group-based downlink data transmission scheduling information; and the second communication unit sends a timing of the first message. It is the timing calculated according to the group identifier Group ID corresponding to the group.
  • the second communication unit 22 in the process of receiving the first message sent by the network side, is the second message, if the first message is a paging message, the second The communication unit 22 monitors the group ID of the local home group in the paging message, or monitors the group ID of the local home group and the downlink data transmission indication. If the first message is a control channel message, the second communication unit 22 The Group ID of the local home group is monitored in the control channel message.
  • the second communication unit 22 when receiving the first message sent by the network side, detects that the first message carries the local terminal identifier UE_ID and The group ID of the local home group triggers the RRC connection establishment process.
  • the third communication unit 23 receives the downlink data transmitted by the network side according to the downlink data transmission scheduling information, and includes:
  • the third communication unit 23 starts the next subframe of the first message, according to the downlink data transmission duration indicated in the downlink data transmission scheduling information, carries the initial subframe position of the downlink data transmission, and downlink data.
  • the transmission interval receives the downlink data transmitted by the network side.
  • the third communication unit 23 receives the downlink data transmitted by the network side according to the downlink data transmission scheduling information, and includes:
  • the third communication unit 23 monitors the physical resource location of the control channel for scheduling the downlink data transmission according to the control channel listening duration indicated by the downlink data transmission scheduling information, starting from the next subframe in which the first message is received;
  • the physical resource location receives the downlink data transmitted by the network side according to the control channel signaling.
  • the second communication unit 22 further carries the radio network temporary identifier RNTI for performing control channel addressing in the first message, in monitoring the physical resource location of the control channel for scheduling downlink data transmission, It also includes using the RNTI to descramble the corresponding control channel.
  • the downlink data transmission scheduling information is group-based downlink data transmission scheduling information
  • the timing of transmitting the first message is a timing calculated according to its own user terminal identifier.
  • the second communication unit 22 monitors the paging message if the first message is a paging message.
  • the user terminal identifier and the downlink data transmission indication if the first message is a control channel message, the second communication unit 22 monitors its own user terminal identifier in the control channel message.
  • the third communication unit 23 receives the downlink data transmitted by the network side according to the downlink data transmission scheduling information, and includes:
  • the third communication unit determines, by using the following formula, a time when the data is to be transmitted, at a time point determined by the following formula, according to the downlink data transmission duration indicated in the downlink data transmission scheduling information, carrying the initial subframe position of the downlink data transmission, and a downlink data transmission interval, and receiving downlink data transmitted by the network side;
  • m is the length of time, which is an integer multiple of the paging period.
  • user terminals that belong to the same user or are relatively densely distributed within a region are grouped, and each group is uniquely identified by a Group ID.
  • the user terminal still listens to the first message in the idle state, where the first message may be a paging message or a control channel message.
  • the user terminal In addition to listening to the paging message sent by the user terminal, the user terminal also needs to use the Group ID of the belonging group to listen to the first message sent for the user terminal home group.
  • a base station transmits downlink data to a user terminal in a group
  • paging the group of user terminals at a paging occasion of the group and the paging message carries the group ID of the group to notify the group.
  • the user terminal receiving the paging message can receive downlink data to a fixed physical resource location within a fixed duration (ie, a time window, also called a time window), thereby reducing transmission of data by the base station to a group of user terminals in the M2M communication.
  • a time window also called a time window
  • embodiments of the present invention can be provided as a method, system, or computer program.
  • Product may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • present invention is in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Description

一种下行数据传输方法及装置 本申请要求在 2012年 4月 28日提交中国专利局、 申请号为 201210133375.6、 发明名称为
"一种下行数据传输方法及装置" 的中国专利申请的优先权, 本申请还要求在 2012年 9月 26曰 提交中国专利局、 申请号为 201210364556.X、 发明名称为 "一种下行数据传输方法及装置" 的中国专利申请的优先权, 这两件中国申请的全部内容均通过引用结合在本申请中。 技术领域 本发明涉及通信技术领域, 特别涉及一种下行数据传输方法及装置。 背景技术 近年来, 随着通信技术的不断发展, 除了传统的人与人(Human to Human, H2H )之 间的沟通和交流更加便捷外, 机器与机器(Machine to Machine, M2M )之间的连接和对 话也日渐成为通信发展的主流。
M2M通信是指机器和机器之间的通信, 与传统的 H2H通信不同, M2M能够自动完 成数据的釆集、 处理与传输, 并不需要人工千预。 M2M通信的一个重要特征是用户终端 比较多, 机器类型通信(Machine Type Communication, MTC )终端的数目远远大于 H2H 的用户终端, 通常是 H2H的用户终端的几十倍。
M2M模式已经应用于很多领域, 例如, 7J表统计, 电表统计, 煤气表统计, 水文监 测等, 这些用户终端或者属于同一个用户, 例如, 属于同一个电力公司的电表, 属于同一 个自来水公司的水表等, 或者在一个区域内分布比较密集, 例如, 水文监测。 当用户需要 对属于该用户的某个用户终端, 或某个区域内属于该用户的某些用户终端发送公共信息 时, 如果通过对属于该用户的每个用户终端进行寻呼, 或者, 通过对属于该用户的每个用 户终端发送相同内容的信息, 就会对网络资源造成一定程度的浪费。
在长期演进( Long Term Evolution, LTE ) 系统中, 数据传输信道为共享信道, 用户 终端的上下行数据传输都是基于调度来实现的。 在调度的过程中, 需要对用户终端寻址。 目前, 对用户终端寻址主要使用 16bit的无线网络临时标识符(Radio Network Temporary Identifier, RNTI ) 方式进行寻址。 RNTI有用于不同目的的多种不同类型, 常见的有: 寻 呼无线网络临时标识符(Paging Radio Network Temporary Identifier, P-RNTI ), 主要用于 调度寻呼消息时寻址; 系统消息无线网络临时标识符(System Information Radio Network Temporary Identifier, SI-RNTI ), 主要用于调度系统消息时寻址; 小区无线网络临时标识 符( Cell Radio Network Temporary Identifier, C-RNTI ), 主要用于动态调度用户数据时寻 址。
当用户终端处于空闲状态时, 用户终端可以接收寻呼消息和系统消息, 寻呼消息和系 统消息都是广播的。 对于 LTE系统, 寻呼消息和系统消息都是通过调度传输的, 即网络侧 在发送寻呼消息和系统消息之前首先会通过物理下行控制信道( Physical Downlink Control Channel, PDCCH )调度传输寻呼消息和系统消息的物理资源, 即物理下行链路共享信道 ( Physical Downlink Shared Channel, PDSCH ) 资源。 对于寻呼消息, 网络侧通过 P-RNTI 加扰 PDCCH;对于系统消息, 网络侧通过 SI-RNTI加扰 PDCCH。用户终端在解扰 PDCCH 时,会分别使用与寻呼消息对应的 P-RNTI以及与系统消息对应的 SI-RNTI来解扰 PDCCH , 这样才会正确解出 PDCCH所携带的调度信息。用户终端根据 PDCCH上携带的调度信息, 在指示的物理资源位置处接收寻呼消息或系统消息。
为了降低功率消耗, 用户终端在空闲状态下按照一定的周期以非连续接收
( Discontinuous Reception, DRX )形式来监听寻呼消息, 即每隔一段时间醒来在固定的位 置监听 P-RNTI加扰的 PDCCH调度的寻呼消息。监听调度寻呼消息的周期叫作 Paging DRX 周期, 监听调度寻呼消息的时机叫作寻呼时机(Paging Occasion, PO )。 用户终端计算系 统帧号 ( System Frame Number, SFN ) 的公式为:
SFN mod T= (T div N)*(UE_ID mod N) (公式一) 其中, SFN是 PO所处的无线帧位置编号, T是 Paging DRX周期, N由网络侧配置 决定, UE_ID为该用户终端的国际移动用户标识码( International Mobile Subscriber Identity, IMSI )。
用户终端可以根据公式一来计算用户终端监听调度寻呼消息的时机的 SFN, 但是具体 是在该无线帧中的哪个子帧监听网络侧对寻呼消息的调度, 还需要由 i_s = floor(UE_ID/N) mod Ns (公式二) 来确定; 其中, i_s是 PO所处的无线帧的子帧的位置编号, N与 Ns 由网络配置决定。
同样, 网络侧会根据公式一来计算每一个用户终端监听寻呼消息的时机的无线帧位置 的编号, 根据公式二来计算每一个用户终端监听网络侧对寻呼消息的调度的具体子帧, 从 而当网络侧需要对该用户终端发送寻呼消息时, 在该子帧所在的位置调度该用户终端的寻 呼消息即可。
由公式一、 公式二可知, 不同的用户终端, 若使用不同的 UE_ID计算得到的 PO所在 的具体子帧的编号可能是不同的,但是如果不同的用户终端,使用相同的 UE_ID计算得到 的 PO所在的具体子帧的编号肯定是相同的。
对于通用移动通信系统( Universal Mobile Telecommunications System, UMTS )系统, R5版本后引入了高速的数据传输技术——高速下行分组接入( High Speed Downlink Packet Access, HSDPA ) /高速上行包接入(High Speed Uplink Packet Access, HSUPA )。 HSDPA 用于下行数据传输, HSUPA用于上行数据传输。 HSDPA釆用基于调度的数据传输方式进 行下行数据传输, 主要包括两个物理信道: 高速下行共享控制信道(High Speed Shared Control Channel, HS-SCCH )和高速下行物理共享信道( High Speed Physical Downlink Shared Channel, HS-PDSCH )„ 其中, HS-SCCH用于调度, 携带网络侧分配的用于数据传输的物 理资源, 即 HS-PDSCH资源, HS-PDSCH具体用于承载数据。 HS-SCCH使用高速下行共 享信道无线网络临时标识符 (High Speed Downlink Shared Channel Radio Network Temporary Identifier , H-RNTI ) 加扰。 H-RNTI 是由无线网络控制器 (Radio Network Controller , RNC ) 分配的。 每一个用户终端在进入连接状态时都会由 RNC 分配一个 H-RNTI。 在下行数据传输过程中, 用户终端使用分配的 H-RNTI监听 HS-SCCH, 如果正 确解扰 HS-SCCH, 则可在网络侧分配的物理资源处接收网络侧发送给自己的数据。
在 UMTS系统中, 用户终端在空闲状态下同样以 DRX形式来监听寻呼消息, 但是, UMTS系统的寻呼消息传输机制却不同于 LTE系统的寻呼消息传输机制。 在 UMTS系统 中, 用户终端需要以 DRX形式来接收寻呼指示信道( Paging Indicator Channel , PICH )。 PICH不携带具体的寻呼消息的内容, 仅仅会指示该用户终端是否被寻呼。 PICH的内容由 一系列 (NPI )寻呼指示因子 Ρψ = 0, ..., NPI-1 , Pq {0, l}组成, PICH块中寻呼指示因子 的长度 JPi可为 2、 4或 8个数据符号。 在四相相移键控 ( Quadrature Phase Shift Keying, QPSK )调制下, JPI对应 4、 8或 16个连续比特。 PICH的突发中 NPIB=352个比特用于承 载寻呼指示。 寻呼指示因子的个数 ^¾可以由: NPI = NPIB / ( 2LPI ) (公式三)来计算。 NPICH 个连续的寻呼指示帧可以组成一个 PICH块, NPICH由高层配置。 因此, 在一个 PICH块内 寻呼指示因子的个数为: NP=NPICH*NPI。 基于以上描述, 本用户终端寻呼因子的计算公式 为:
PI = ( IMSI div 8192 ) mod NP。 (公式四)
PI值与一个 PICH块的第 n帧的寻呼指示 Pq相关联, q, n由以下关系式获得: q = PI mod NPI以及 n = PI div Npio
根据公式四可知, 用户终端读取相应位置上的寻呼指示因子 PI, 如果 PI的比特为全
1 { 1, 1, 1.., 1 } , 则意味着用户终端被要求接收 PICH信道之后寻呼块内的寻呼子信道, 以确 定寻呼消息中是否包含着对本用户终端的寻呼。 反之, 则不必接收后面的寻呼消息。
如果用户终端发现被寻呼, 则在固定的时间间隔 (Ngap, 网络侧配置该值), 在选定 的物理资源——辅公共控制物理信道 ( Secondary Common Control Physical Channel , SCCPCH )上接收寻呼消息。 网络侧会配置多条 SCCPCH信道, 用户终端选择接收寻呼消 息的 SCCPCH信道的方法是根据 S-CCPCH 索引 = IMSI mod K (公式五) 来确定的, S-CCPCH索弓 I是标识 SCCPCH信道的编号。
根据以上论述可知,在 UMTS系统中,用户终端在空闲状态下监听自己的寻呼消息时, 同样需要根据自己的 IMSI在公共资源中选择自己需要使用的资源。 如果一组用户终端使 用相同的标识, 那么就可以在同样的时刻监听到同样的消息。
现有技术中, 向至少由一个用户终端构成的群组传输数据的方式有: 系统消息广播、 寻呼消息。 系统消息广播数据传输方式, 系统消息属于同一用户的所有用户终端传输数据 信息, 并不适合向某一组用户终端传输数据信息; 寻呼消息数据传输方式, 由于其承载的 资源有限, 而且若该数据传输方式承载较多的数据时会影响到正常的用户终端, 特别是会 影响到正常的边缘用户终端接收正常寻呼消息。 基于以上分析可知, 通过现有技术向某一 组用户终端传输下行数据时, 存在网络资源利用率低的问题, 因此, 目前没有适合向某一 组用户终端传输数据的基于组的下行数据传输方式。 发明内容 本发明实施例提供一种下行数据传输方法及装置, 用以减少网络侧向某组用户终端传 输数据时的网络资源浪费, 提高网络资源利用率。
本发明实施例提供的具体技术方案如下:
一种下行数据传输方法, 包括:
向用户终端发送下行数据传输调度信息;
获得相应的发送第一消息的时机, 所述第一消息用以指示终端侧接收下行数据; 在所述时机向用户终端发送第一消息;
按照所述下行数据传输调度信息, 向用户终端传输下行数据。
一种下行数据传输方法, 包括:
接收网络侧发送的下行数据传输调度信息;
获得相应的接收第一消息的时机, 所述第一消息用以指示终端侧接收下行数据; 在所述时机接收网络侧发送的第一消息;
按照所述下行数据传输调度信息, 接收网络侧传输的下行数据。
—种下行数据传输装置, 包括:
第一传输单元, 用于向用户终端发送下行数据传输调度信息;
获取单元, 用于获得相应的发送第一消息的时机, 所述第一消息用以指示终端侧接收 下行数据;
第二传输单元, 用于在所述时机向用户终端发送第一消息;
第三传输单元, 用于按照所述下行数据传输调度信息, 向用户终端传输下行数据。 一种下行数据传输装置, 包括:
第一通信单元, 用于接收网络侧发送的下行数据传输调度信息; 获取单元, 用于获得相应的接收第一消息的时机, 所述第一消息用以指示终端侧接收 下行数据;
第二通信单元, 用于在所述时机接收网络侧发送的第一消息;
第三通信单元, 用于按照所述下行数据传输调度信息, 接收网络侧传输的下行数据。 本发明实施例中, 将属于同一用户, 或者, 在一个区域范围内分布比较密集的用户终 端组成组。 用户终端除了使用自己的 UE_ ID根据背景技术中介绍的公式一和公式二来监听 针对用户终端发送的寻呼消息外, 同时还需要使用自己所归属的组的 Group ID或者自己 的 UE ID, 根据背景技术中介绍的公式一和公式二来监听针对用户终端归属组发送的第一 消息。 通过对组进行管理和控制, 将会优化信令传输, 实现了减少在 M2M通信中网络侧向 某组用户终端传输数据时的网络资源浪费, 提高网络资源利用率的效果。 附图说明 图 1为本发明实施例中系统运行环境示意图;
图 2为本发明实施例中网络侧功能结构示意图;
图 3为本发明实施例中用户终端功能结构示意图;
图 4A为本发明实施例中,对于 LTE系统,第一种基于组的下行数据传输详细流程图; 图 4B为本发明实施例中, 对于 LTE系统, 第一种基于组的下行数据传输示意图; 图 5A为本发明实施例中, 对于 UMTS系统, 第一种基于组的下行数据传输详细流程 图;
图 5B为本发明实施例中, 对于 UMTS系统, 第一种基于组的下行数据传输示意图; 图 6A为本发明实施例中,对于 LTE系统,第二种基于组的下行数据传输详细流程图; 图 6B为本发明实施例中, 对于 LTE系统, 第二种基于组的下行数据传输示意图; 图 7A为本发明实施例中, 对于 UMTS系统, 第二种基于组的下行数据传输详细流程 图;
图 7B为本发明实施例中, 对于 UMTS系统, 第二种基于组的下行数据传输示意图。 具体实施方式 为了减少在 M2M通信中的网络资源浪费, 提高网络资源利用率, 本发明实施例提供 一种下行数据传输方法, 将属于同一用户, 或在一个区域范围内分布比较密集的用户终端 组成组,对于每一个组用一个 Group ID来唯一标识, 用户终端在空闲状态下仍然监听第一 消息, 上述第一消息可以是寻呼消息, 也可以是控制信道消息, 其中, 控制信道可以是 PDCCH, 也可以是 HS-SCCH。 用户终端除了使用自身的 UE_ID根据背景技术中介绍的公 式一和公式二来监听针对自身的寻呼消息外, 同时还需要使用用户终端归属组的 Group ID , 根据背景技术中介绍的公式一和公式二来监听针对用户终端归属组发送的第一消息。
网络侧在第一消息对应的时机通过设定的物理资源向用户终端发送第一消息, 若第一 消息为寻呼消息, 则网络侧在寻呼消息中携带用户终端归属组的 Group ID , 或者, 携带用 户终端归属组的 Group ID及下行数据传输指示 ( data-flag ); 若第一消息为控制信道消息, 则网络侧在该控制信道消息中携带用户终端归属组的 Group ID ,其中,网络侧可以为基站, 也可以为 RNC。
以寻呼消息为例, 网络侧向某组用户终端传输下行数据时, 在该组的寻呼时机处寻呼 该组用户终端,寻呼消息携带该组的 Group ID来通知该组内的所有用户终端。接收到该寻 呼消息的用户终端可以在固定时长(即时间窗口, 也称时间窗) 内到固定的物理资源位置 处接收下行数据, 改变用户终端行为, 令用户终端无需进入无线资源控制( Radio Resource Control, RRC )连接状态接收网络侧分配的下行调度资源。 网络侧可以在固定时长内多次 传输相同的数据来保证下行数据传输的可靠性。 固定时长、 固定的物理资源及下行数据传 输间隔均可以通过系统消息进行广播, 也可以通过 RRC 消息发送。 所有组的所有用户终 端都可以使用这套参数。 这个固定的物理资源在没有下行组数据传输时可以被网络侧调度 给其它用户终端使用, 一旦有组数据传输, 在数据传输过程中, 网络侧不会调度该固定的 物理资源给其它用户终端使用。
如果用户终端无需进入 RRC 连接状态接收网络侧分配的下行调度资源, 且网络侧通 过 RRC 消息发送固定时长、 固定的物理资源及下行数据传输间隔。 具体的, 在用户终端 处于 RRC连接状态时, 网络侧通过 RRC消息发送固定时长、 固定的物理资源及下行数据 传输间隔。 用户终端保存接收到的固定时长、 固定的物理资源及下行数据传输间隔。 当用 户终端退出 RRC连接状态后, 可以根据保存的这些信息接收网络侧分配的下行调度资源。
或者, 用户终端在空闲状态下按照上述方法监听组寻呼时机, 网络侧向该组用户终端 传输下行数据时,在组寻呼时机,通过寻呼消息携带该 Group ID来通知组内的所有用户终 端。 该寻呼消息中同时携带与该组对应的 C-RNTI (网络侧动态分配, 同正常的 C-RNTI ) 或 H-RNTK RNC分配)。收到寻呼消息的用户终端可以在固定时长内监听由收到的 C-RNTI 加扰的 PDCCH或 H-RNTI加扰的 HS-SCCH。 时长超时后, C-RNTI或 H-RNTI被释放。 这个时长可以通过系统消息, 也可以通过 RRC 消息发送, 所有组的所有用户终端都是相 同的。监听到对应的 C-RNTI加扰的 PDCCH或对应的 H-RNTI加扰的 HS-SCCH后, 用户 终端在 PDCCH或 HS-SCCH调度的物理资源位置处接收下行数据。
为了减少在 M2M通信中的网络资源浪费, 提高网络资源利用率, 本发明实施例提供 另一种下行数据传输方法, 将属于同一用户, 或在一个区域范围内分布比较密集的用户终 端组成组。 用户终端在空闲状态下仍然监听第一消息, 该第一消息可以是寻呼消息, 也可 以是控制信道消息。 其中, 控制信道可以是 PDCCH, 也可以是 HS-SCCH。 用户终端需要 使用自身的 UE_ID, 根据背景技术中介绍的公式一和公式二来监听消息, 以便获取针对用 户终端归属组发送的第一消息。
网络侧在第一消息对应的时机通过设定的物理资源向用户终端发送第一消息, 若第一 消息为寻呼消息, 则网络侧在寻呼消息中携带用户终端的 UE ID 及下行数据传输指示 ( data-flag ); 若第一消息为控制信道消息, 则网络侧在该控制信道消息中携带用户终端的 UE ID, 其中, 网络侧可以为基站, 也可以为 RNC。
以寻呼消息为例, 网络侧向某组用户终端传输下行数据时, 在该组的寻呼时机处寻呼 该组用户终端。 其中, 对于该组中的不同用户终端, 组的寻呼时机可能不相同。 向该组中 的各用户终端发送的寻呼消息携带用户终端的 UE ID和下行数据传输指示来通知该用户终 端。 接收到该寻呼消息的用户终端可以在固定时长(即时间窗口, 也称时间窗) 内到固定 的物理资源位置处接收下行数据, 改变用户终端行为, 令用户终端无需进入 RRC 连接状 态接收网络侧分配的下行调度资源。 网络侧可以在固定时长内多次传输相同的数据来保证 下行数据传输的可靠性。 固定时长、 固定的物理资源及下行数据传输间隔均可以通过系统 消息进行广播, 也可以通过 RRC 消息发送。 该组的所有用户终端都可以使用这套参数。 这个固定的物理资源在没有下行组数据传输时可以被网络侧调度给其它用户终端使用, 一 旦有组数据传输, 在数据传输过程中, 网络侧不会调度该固定的物理资源给其它用户终端 使用。
下面以网络侧釆用系统消息, 如, 系统信息广播( System Information Broadcast , SIB ) 消息, 向用户终端通知下行数据传输调度信息, 以及釆用寻呼消息通知用户终端接收传输 的下行数据为例, 结合附图对本发明优选的实施方式进行详细说明, 其中,
参阅图 1所示, 本发明实施例中, 系统运行环境包括网络侧和若千用户终端, 其中, 参阅图 2所示, 本发明实施例中, 网络侧包括第一传输单元 10、 获取单元 11、 第二传 输单元 12、 第三传输单元 13 , 其中,
第一传输单元 10, 用于向用户终端发送下行数据传输调度信息;
获取单元 11 , 用于获得相应的发送第一消息的时机, 所述第一消息用以指示终端侧接 收下行数据;
第二传输单元 12, 用于在所述时机向用户终端发送第一消息;
第三传输单元 13 , 用于按照所述下行数据传输调度信息, 向用户终端传输下行数据。 参阅图 3所示, 本发明实施例中, 用户终端包括第一通信单元 20、 获取单元 21、 第 二通信单元 22、 第三通信单元 23 , 其中,
第一通信单元 20 , 用于接收网络侧发送的下行数据传输调度信息;
获取单元 21 , 用于获得相应的接收第一消息的时机, 所述第一消息用以指示终端侧接 收下行数据;
第二通信单元 22 , 用于在所述时机接收网络侧发送的第一消息;
第三通信单元 23 ,用于按照所述下行数据传输调度信息,接收网络侧传输的下行数据。 基于上述系统架构, 参阅图 4A所示, 本发明实施例中, 对于 LTE系统, 基于组的下 行数据传输详细流程之一如下:
步骤 200 , 基站通过 SIB消息来广播基于组的下行数据传输调度信息, 该下行数据传 输调度信息中至少携带用户终端用于接收下行数据的资源指示。
当然, 基站还可以通过 RRC 消息来发送基于组的下行数据传输调度信息, 本实施例 中仅以广播形式的 SIB消息为例。
该下行数据传输调度信息的具体内容可以包括: 组内的用户终端接收基站传输的下行 数据的时长(即时间窗口, 也称时间窗), 接收基站传输的下行数据的物理资源, 下行数 据传输间隔, 进一步地, 还可以包括接收基站传输的下行数据的子帧偏移量。
其中, 用户终端接收基站传输的下行数据的时长, 即该下行数据传输调度信息中指示 的下行数据传输时长。
接收基站传输的下行数据的子帧偏移量确定的子帧位置, 即承载下行数据传输的起始 子帧的位置。
本发明实施例中, SIB消息的具体形式可以如下所示:
Group-scheduling-info: := SEQUENCE {
scheduling-Config SEQUENCE {
duration ENUMERATED {rB2, rf64, rfl28},
RepetitionPeriod ENUMERATED {rf4,rf8,rfl6} OPTIONAL
Offset INTEGER (0..159) OPTIONAL
},
Phy-resource-Config SEQUENCE {
}
}
步骤 210, 用户终端在空闲状态下, 除了釆用 UE_ID监听自身的寻呼消息外, 还需要 通过该用户终端归属组的 Group ID计算监听用户终端归属组的寻呼时机。
其中, 用户终端归属组的寻呼时机, 即发送 /接收寻呼消息的时机。
用户终端计算归属组的寻呼时机所处的无线帧位置编号 SFN的公式为:
SFN mod T= (T div N)*(Group ID mod N) (公式六) 其中, SFN是归属组的寻呼时机所处的无线帧位置编号, T是 Paging DRX周期, N 由基站配置决定, Group ID为该用户终端归属组的标识。
用户终端可以根据公式六来计算用户终端归属组监听调度寻呼消息的时机所处的 SFN, 但是具体是在该无线帧中的哪个子帧监听基站对寻呼消息的调度, 还需要由 i_s = floor(Group_ID/N) mod Ns (公式七)来确定; 其中, i_s是用户终端归属组的寻呼时机所 处的无线帧的子帧的位置编号, N与 Ns由基站配置决定。
用户终端归属组的 Group ID在该用户终端的卡中进行了设置,卡可以为用户身份识别 ( Subscriber Identity Module , SIM )卡, 也可以是全球用户识别卡(Universal Subscriber Identity Module , USIM )卡, 且每个组的 Group ID是唯一确定的。
实际应用中, 除了可以根据用户终端归属组的 Group ID计算监听归属组的寻呼时机, 还可以根据用户终端标识(UE ID )计算监听归属组的寻呼时机, 本发明实施例仅以前者 为例进行说明, 但实际操作时并不局限于此。
如果根据用户终端标识计算监听归属组的寻呼时机, 具体的, 用户终端按照背景技术 中介绍的公式一和公式二来计算寻呼时机, 本申请中, 该寻呼时机是归属组的寻呼时机。 其中, 一组中不同的用户终端, 其归属组的寻呼时机可能各不相同。 在基站侧, 基站分别 针对一组中每个用户终端的用户终端标识, 按照背景技术中介绍的公式一和公式二来计算 相应的用户终端的归属组的寻呼时机。
步骤 220, 用户终端接收基站通过 PDCCH发送的控制信令, 控制信令中携带有基站 下发的用于监听寻呼消息的物理资源位置。
基站釆用 P-RNTI对 PDCCH发送的控制信令加扰, 由于 P-RNTI是协议中规定的, 因 此, 用户终端根据相关协议即可以釆用相应的 P-RNTI对接收的控制信令进行解扰, 从而 获得基站下发的用于监听寻呼消息的物理资源位置。
步骤 230, 用户终端在归属组对应的寻呼时机内, 在基站通知的物理资源位置处接收 基站发送的寻呼消息。
实际应用中, 用户终端可以在归属组对应的寻呼时机内, 在基站通知的物理资源位置 处, 周期性地监听寻呼消息, 寻呼消息中携带用户终端归属组的 Group ID, 或者携带用户 终端归属组的 Group ID与下行数据传输指示(data-flag )。 考虑到寻呼消息大小受限, 较佳 的, 每个寻呼消息中仅携带一个或少数的 Group ID。
本发明实施例中, 寻呼消息的具体的形式可以如下所示:
Paging-vb00-IEs:: = SEQUENCE {
pagingGroupRecordList PagingGroupRecordList OPTIONAL, -- Need ON
nonCriticalExtension SEQUENCE {}
OPTIONAL - Need OP
}
PagingGroupRecordList:: = SEQUENCE (SIZE (L.maxPageGruop)) OF PagingGroupRecord PagingGroupRecord ::: SEQUENCE {
group-Identity Group-Identity,
data-flag ENUMERATED {true} OPTIONAL 除了可以通过寻呼消息通知用户终端开始接收组的下行数据, 基站还可以通过特殊的 控制信道来通知用户终端开始接收组的下行数据。 这里提到的特殊的控制信道可以是 PDCCH, 该 PDCCH携带对应的 Group ID。
如上所述, 除了可以根据用户终端归属组的 Group ID计算监听归属组的寻呼时机,还 可以根据用户终端标识计算监听归属组的寻呼时机。
应当指出的是, 如果根据用户终端标识计算监听归属组的寻呼时机。 对于用户终端而 言, 其并不对归属组的寻呼时机和针对其自身的寻呼时机进行区分。
如果步骤 220中根据用户终端标识计算监听归属组的寻呼时机。 那么, 步骤 230在实 际应用中, 用户终端可以在归属组对应的寻呼时机内, 在基站通知的物理资源位置处, 周 期性地监听寻呼消息,寻呼消息中携带用户终端的 UE ID与下行数据传输指示( data-flag )。
步骤 240, 用户终端监听到相应的寻呼消息后, 根据 SIB消息通知的下行数据传输调 度信息, 接收基站传输的下行数据。
具体为: 用户终端监测到寻呼消息中携带自己归属组的 Group ID, 或者, 用户终端监 测到寻呼消息中携带自己归属组的 Group ID及下行数据传输指示 (data-flag ) 时, 在收到 该寻呼消息的下一个子帧处 (也可以是下一个子帧 +偏移子帧处), 釆用 SIB 消息通知的 下行数据传输时长(即时间窗口, 也称时间窗), 以及下行数据传输间隔, 在 SIB 消息通 知的固定的物理资源位置处, 重复接收基站传输的下行数据。 SIB 消息通知的固定的物理 资源位置处,即承载下行数据传输的起始子帧位置上,下行数据传输调度信息中包括的 UE 接收基站传输的下行数据的物理资源。 其中, 承载下行数据传输的起始子帧位置, 即根据 步骤 200中, 下行数据传输调度信息中包括的 "接收基站传输的下行数据的子帧偏移量" 确定的子帧位置。
其中, 接收下行数据的时长由基站在 SIB消息中配置。 基站从同一时刻开始, 在与该 组的用户终端接收下行数据的同样的物理资源处传输该组的下行数据。 基站可能会周期性 地重复传输上述下行数据, 保证下行数据传输的可靠性。 如果时长超时, 基站停止传输下 行数据, 该组用户终端同样停止接收下行数据。 如果用户终端接收的寻呼消息中包含自身 的 UE_ID以及自己归属组的 Group ID, 则用户终端触发 RRC连接建立过程, 不执行下行 数据接收操作。
具体的, 基站按照所述下行数据传输调度信息中指示的下行数据传输时长, 承载下行 数据传输的起始子帧位置, 以及下行数据传输间隔, 向用户终端传输下行数据。
如上所述, 除了可以根据用户终端归属组的 Group ID计算监听归属组的寻呼时机,还 可以根据用户终端标识计算监听归属组的寻呼时机。
如果步骤 220中根据用户终端标识计算监听归属组的寻呼时机。 那么, 步骤 240具体 为:用户终端监测到寻呼消息中携带自己 UE ID及下行数据传输指示时,利用如下公式(八) 确定开始接收数据时刻, 在公式(八)确定的时间点, 釆用 SIB消息通知的下行数据传输 时长(即时间窗口, 也称时间窗), 以及下行数据传输间隔, 在 SIB 消息通知的固定的物 理资源位置处, 重复接收基站传输的下行数据。
SFN mod m=0 公式(八)
其中, m为网络侧配置或协议规定的时间长度, 该时间长度是寻呼周期的整数倍, 用 来使归属组内的所有用户终端对其接收时刻。 用户终端监测到寻呼消息中携带自己的 UE ID及下行数据传输指示后第一个满足该公式的 SFN即为接收数据时刻。
其中, 接收下行数据的时长由基站在 SIB消息中配置。 基站按照上述公式(八)确定 开始发送数据的时刻, 从同一时刻开始, 在与该组的用户终端接收下行数据的同样的物理 资源处传输该组的下行数据。 基站可能会周期性地重复传输上述下行数据, 保证下行数据 传输的可靠性。 如果时长超时, 基站停止传输下行数据, 该组用户终端同样停止接收下行 数据。 如果用户终端接收的寻呼消息中包含自身的 UE_ID以及自己归属组的 Group ID , 则用户终端触发 RRC连接建立过程, 不执行下行数据接收操作。
具体的, 基站利用上述公式(八)确定开始发送数据时刻, 在公式(八)确定的时间 点, 按照所述下行数据传输调度信息中指示的下行数据传输时长, 承载下行数据传输的起 始子帧位置, 以及下行数据传输间隔, 向用户终端传输下行数据。
对于 LTE系统, 第一种基于组的下行数据传输示意图为图 4B所示。
基于上述系统架构, 参阅图 5A所示, 本发明实施例中, 对于 UMTS系统, 基于组的 下行数据传输详细流程之一如下:
步骤 300 , 基站通过 SIB消息来广播基于组的下行数据传输调度信息, 该下行数据传 输调度信息中至少携带用户终端用于接收下行数据的资源指示。
当然, 基站还可以通过 RRC 消息来发送基于组的下行数据传输调度信息, 本实施例 中仅以广播形式的 SIB消息为例。
该下行数据传输调度信息的具体内容可以包括: 组内的用户终端接收基站传输的下行 数据的时长, 接收基站传输的下行数据的物理资源, 下行数据传输间隔, 进一步地, 还可 以包括接收基站传输的下行数据的子帧偏移量。
其中, 用户终端接收基站传输的下行数据的时长, 即该下行数据传输调度信息中指示 的下行数据传输时长。
接收基站传输的下行数据的子帧偏移量确定的子帧位置, 即承载下行数据传输的起始 子帧的位置。 本发明实施例中, SIB消息的具体形式可以如表 1所示:
Figure imgf000014_0001
表 1
步骤 310, 用户终端在空闲状态下, 除了釆用 UE_ID监听自身的寻呼消息外, 还需要 通过该用户终端归属组的 Group ID计算监听归属组的寻呼时机。
用户终端根据公式六计算归属组寻呼时机所处的无线帧位置编号 SFN, 由公式七来确 定具体是在该无线帧中的哪个子帧监听基站对寻呼消息的调度。
用户终端归属组的 Group ID在该用户终端的卡中进行了设置, 卡可以为 SIM卡, 也 可以是 USIM卡, 且每个组的 Group ID是唯一确定的。
当然, 用户终端也可以通过其 UE_ID计算监听归属组的寻呼时机,其具体实现方式可 以参照上述实施例的描述, 这里不再赘述。
步骤 320, 用户终端接收基站通过 PICH发送的控制信令, 控制信令中携带表示用户 终端是否被寻呼的标识。
步骤 330, 用户终端在归属组对应的寻呼时机内, 根据基站的通知在预定的物理资源 位置处接收基站发送的寻呼消息。
实际应用中, 用户终端可以在归属组对应的寻呼时机内, 根据基站的通知在预定的物 理资源位置处, 周期性地监听寻呼消息, 寻呼消息中携带用户终端归属组的 Group ID, 或 者携带用户终端归属组的 Group ID与下行数据传输指示(data-flag )。考虑到寻呼消息大小 受限, 较佳的, 每个寻呼消息中仅携带一个或少数的 Group ID。
本发明实施例中, 寻呼消息的具体形式可以如表 2所示:
Figure imgf000015_0001
表 2
除了可以通过寻呼消息通知用户终端开始接收组的下行数据, 基站还可以通过特殊的 控制信道来通知用户终端开始接收组的下行数据。 这里提到的特殊的控制信道可以是 HS-SCCH, 该 HS-SCCH携带对应的 Group ID。
如上所述,如果用户终端通过其 UE_ID计算监听归属组的寻呼时机,且釆用寻呼消息, 那么寻呼消息中携带用户终端的 UE ID与下行数据传输指示; 如果用户终端通过其 UE ID 计算监听归属组的寻呼时机, 且釆用控制信道, 则该控制信道中携带用户终端的 UE ID。
步骤 340 , 用户终端监听到相应的寻呼消息后, 根据 SIB消息通知的下行数据传输调 度信息, 接收基站传输的下行数据。
具体为: 用户终端监测到寻呼消息中携带自己归属组的 Group ID, 或者, 用户终端监 测到寻呼消息中携带自己归属组的 Group ID及下行数据传输指示 (data-flag ) 时, 在收到 该寻呼消息的下一个子帧处 (也可以是下一个子帧 +偏移子帧处), 釆用 SIB 消息通知的 下行数据传输时长, 以及下行数据传输间隔, 在 SIB消息通知的固定的物理资源位置处, 重复接收基站传输的下行数据。 SIB 消息通知的固定的物理资源位置处, 即承载下行数据 传输的起始子帧位置上, 下行数据传输调度信息中包括的 UE接收基站传输的下行数据的 物理资源。 其中, 承载下行数据传输的起始子帧位置, 即根据步骤 200中, 下行数据传输 调度信息中包括的 "接收基站传输的下行数据的子帧偏移量" 确定的子帧位置。
其中, 接收下行数据的时长由基站在 SIB消息中配置。 基站从同一时刻开始, 在与该 组的用户终端接收下行数据的同样的物理资源处传输该组的下行数据。 基站可能会周期性 地重复传输上述下行数据, 保证下行数据传输的可靠性。 如果时长超时, 基站停止传输下 行数据, 该组用户终端同样停止接收下行数据。 如果用户终端接收的寻呼消息中包含自身 的 UE_ID以及自己归属组的 Group ID, 则用户终端触发 RRC连接建立过程, 不执行下行 数据接收操作。
如上所述,如果用户终端通过其 UE_ID计算监听归属组的寻呼时机,且釆用寻呼消息。 那么, 步骤 340具体为: 用户终端监测到寻呼消息中携带自己 UE ID及下行数据传输指示 时, 利用如下公式(八)确定开始接收数据时刻, 在公式(八)确定的时间点, 釆用 SIB 消息通知的下行数据传输时长(即时间窗口, 也称时间窗), 以及下行数据传输间隔, 在 SIB消息通知的固定的物理资源位置处, 重复接收基站传输的下行数据。
SFN mod m=0 公式(八)
其中, m为网络侧配置或协议规定的时间长度, 该时间长度为寻呼周期的整数倍。 用 户终端监测到寻呼消息中携带自己的 UE ID及下行数据传输指示后第一个满足该公式的 SFN即为接收数据时刻。
对于 UMTS系统, 第一种基于组的下行数据传输示意图为图 5B所示。
基于上述系统架构, 参阅图 6A所示, 本发明实施例中, 对于 LTE系统, 基于组的下 行数据传输详细流程之二如下:
步骤 400 , 基站通过 SIB消息来广播基于组的下行数据传输调度信息, 该下行数据传 输调度信息中至少携带用户终端用于接收下行数据的资源指示。
当然, 基站还可以通过 RRC 消息来发送基于组的下行数据传输调度信息, 本实施例 中仅以广播形式的 SIB消息为例。
该下行数据传输调度信息的具体内容可以包括: 组内的用户终端的控制信道监听时 长, 以及调度下行数据传输的 PDCCH的物理资源位置, 进一步地, 还可以包括接收基站 传输的下行数据的子帧偏移量。
步骤 410, 用户终端在空闲状态下, 除了釆用 UE_ID监听自身的寻呼消息外, 还需要 通过该用户终端归属组的 Group ID计算监听归属组的寻呼时机。
用户终端根据公式六计算归属组寻呼时机所处的无线帧位置编号 SFN, 由公式七来确 定具体是在该无线帧中的哪个子帧监听基站对寻呼消息的调度。
用户终端归属组的 Group ID在该用户终端的卡中进行了设置, 卡可以为 SIM卡, 也 可以是 USIM卡, 且每个组的 Group ID是唯一确定的。
步骤 420, 用户终端接收基站通过 PDCCH发送的控制信令, 控制信令中携带有基站 下发的用于监听寻呼消息的物理资源位置。
基站釆用 P-RNTI对 PDCCH发送的控制信令加扰, 由于 P-RNTI是协议中规定的, 因 此, 用户终端根据相关协议即可以釆用相应的 P-RNTI对接收的控制信令进行解扰, 从而 获得基站下发的用于监听寻呼消息的物理资源位置。 步骤 430, 用户终端在归属组对应的寻呼时机内, 在基站通知的物理资源位置处接收 基站发送的寻呼消息。
实际应用中, 用户终端可以在归属组对应的寻呼时机内, 在基站通知的物理资源位置 处, 周期性地监听寻呼消息, 上述寻呼消息中不仅可以携带该组的 Group ID , 也可以携带 用户终端归属组的 Group ID与下行数据传输指示(data-flag ), 进一步地, 还可以携带通知 用户终端进行控制信道寻址的 C-RNTI。
本发明实施例中, 寻呼消息的具体形式如下:
Paging-vxxx-IEs:: = SEQUENCE {
PagingGroupRecordList PagingGroupRecordList OPTIONAL, - Need ON nonCriticalExtension SEQUENCE {} OPTIONAL Need OP
}
PagingGroupRecordList SEQUENCE (SIZE (L.maxPageGruop)) OF
PagingGroupRecord
PagingGroupRecord ::= SEQUENCE {
group-Identity Group-Identity,
c-R TI C-RNTI,
}
步骤 440, 用户终端监听到相应的寻呼消息后, 根据寻呼消息携带的信息监测调度下 行数据传输的 PDCCH。
基站在通过 PDCCH 向用户终端调度下行数据传输的过程中, 釆用寻呼消息携带的 C-RNTI对 PDCCH进行加扰。 用户终端监测到寻呼消息中携带自己所属组的 Group ID, 或者, 监测到寻呼消息中携带自己归属组的 Group ID及下行数据传输指示( data-flag )时, 用户终端可以在接收到该寻呼消息的下一个子帧处(也可以是下一个子帧 +偏移子帧处), 才艮据 SIB 消息通知的控制信道监听时长(即时间窗口, 也称时间窗), 釆用该寻呼消息中 携带 C-RNTI监测调度下行数据传输的 PDCCH, 并釆用 C-RNTI对相应的 PDCCH进行解 扰, 获得下行数据调度方式, 以便按照该下行数据调度方式接收基站传输的下行数据。 即, 用户终端在接收到该寻呼消息的下一个子帧处(也可以是下一个子帧 +偏移子帧处), 根据 SIB消息通知的控制信道监听时长(即时间窗口, 也称时间窗), 监测调度下行数据传输的 控制信道的物理资源位置; 其中, 具体通过寻呼消息中携带的 C-RNTI尝试解调监听时长 内的 PDCCH, —旦解调正确说明监测到为其调度的 PDCCH, 解调成功也就获得了数据传 输的物理资源。
步骤 450 , 用户终端按照 PDCCH的调度, 接收基站传输的下行数据。
其中, PDCCH的调度即上述获取的下行数据调度方式。 用户终端在控制信道监听时长超时后释放由基站分配的 C-RNTI, 同样, 基站在控制 信道监听时长超时后释放 C-RNTL
相应的, 基站在所述下行数据传输调度信息指示的控制信道监听时长内, 按照所述下 行数据传输调度信息指示的物理资源位置, 通过控制信道向用户终端调度下行数据传输; 以及
基于所述控制信道调度的资源向用户终端传输下行数据。
应当指出的是, 上述例举了在寻呼消息中携带用以通知用户终端进行控制信道寻址的 RNTI, 并在通过控制信道向用户终端调度下行数据传输的过程中, 釆用该 RNTI对相应的 控制信道进行加扰的实现方式。 但本发明实施例不仅限于此, 还可以通过标准约定或者基 站与用户终端的预先约定, 规定 RNTI, 在通过控制信道向用户终端调度下行数据传输的 过程中, 釆用规定的 RNTI对相应的控制信道加扰。 相应的, 在用户终端侧, 在监测调度 下行数据传输的控制信道的物理资源位置的过程中, 还可以釆用规定的 RNTI对相应的控 制信道进行解扰。
对于 LTE系统, 第二种基于组的下行数据传输示意图为图 6B所示。
基于上述系统架构, 参阅图 7A所示, 本发明实施例中, 对于 UMTS系统, 基于组的 下行数据传输详细流程之二如下:
步骤 500 , 基站通过 SIB消息来广播基于组的下行数据传输调度信息, 该下行数据传 输调度信息中至少携带用户终端用于接收下行数据的资源指示。
当然, 基站还可以通过 RRC 消息来发送基于组的下行数据传输调度信息, 本实施例 中仅以广播形式的 SIB消息为例。
该下行数据传输调度信息的具体内容可以包括: 组内的用户终端的控制信道监听时 长, 以及调度下行数据传输的 HS-SCCH的物理资源位置, 进一步地, 还可以包括接收基 站传输的下行数据的子帧偏移量。
本发明实施例中, 系统消息的具体形式可以如表 3所示:
Figure imgf000018_0001
表 3
步骤 510, 用户终端在空闲状态下, 除了釆用 UE_ID监听自身的寻呼消息外, 还需要 通过该用户终端归属组的 Group ID计算监听归属组的寻呼时机。 用户终端根据公式六计算归属组寻呼时机所处的无线帧位置编号 SFN, 由公式七来确 定具体是在该无线帧中的哪个子帧监听基站对寻呼消息的调度。
用户终端归属组的 Group ID在该用户终端的卡中进行了设置, 卡可以为 SIM卡, 也 可以是 USIM卡, 且每个组的 Group ID是唯一确定的。
步骤 520, 用户终端接收基站通过 PICH发送的控制信令, 控制信令中携带表示用户 终端是否被寻呼的标识。
步骤 530, 用户终端在归属组对应的寻呼时机, 根据基站的通知在预定的物理资源位 置处接收基站发送的寻呼消息。
实际应用中, 用户终端可以在归属组对应的寻呼时机内, 根据基站的通知在预定的物 理资源位置处, 周期性地监听寻呼消息, 上述寻呼消息中不仅可以携带该组的 Group ID, 也可以携带用户终端所属组的 Group ID与下行数据传输指示(data-flag ), 进一步地, 还可 以携带通知用户终端进行控制信道寻址的 H-RNTI。
本发明实施例中, 寻呼消息的具体形式如表 4所示:
Figure imgf000019_0001
表 4
步骤 540, 用户终端监听到相应的寻呼消息后, 根据寻呼消息携带的信息监测调度下 行数据传输的 HS-SCCH。
基站在通过控制信道向用户终端调度下行数据传输的过程中, 釆用寻呼消息携带的 H-RNTI对 HS-SCCH进行加扰。 用户终端监测到寻呼消息中携带自己归属组的 Group ID, 或者, 监测到寻呼消息中携带自己归属组的 Group ID及下行数据传输指示( data-flag )时, 用户终端可以在接收到该寻呼消息的下一个子帧处(也可以是下一个子帧 +偏移子帧处), 根据 SIB消息通知的控制信道监听时长, 釆用该寻呼消息中携带 H-RNTI监测调度下行数 据传输的 HS-SCCH, 并釆用 H-RNTI对相应的 HS-SCCH进行解扰, 获得下行数据调度方 式, 以便按照该下行数据调度方式接收基站传输的下行数据。
步骤 550 , 用户终端根据 HS-SCCH的调度, 接收基站传输的下行数据。
其中, HS-SCCH的调度即上述的下行数据调度方式。
用户终端在控制信道监听时长超时后释放由基站分配的 H-RNTI, 同样, 基站在控制 信道监听时长超时后释放 H-RNTI。
对于 UMTS系统, 第二种基于组的下行数据传输示意图为图 7B所示。
基于图 2所示的网络侧架构, 本发明实施例网络侧各功能模块的工作方式如下, 其具 体工作方式可以参照方法实施例的描述, 这里不再赘述。
基于图 2所示的网络侧架构, 较佳地, 第一传输单元 10釆用系统消息或者无线资源 控制 RRC消息向用户终端发送所述下行数据传输调度信息。
基于图 2所示的网络侧架构, 较佳地, 所述第一传输单元 10发送的下行数据传输调 度信息是基于组的下行数据传输调度信息; 所述获取单元获得的发送第一消息的时机的是 根据所述组对应的组标识 Group ID计算得到的时机。
基于上述任一装置实施例, 较佳地, 第二传输单元 12在所述时机向用户终端发送所 述第一消息时, 若所述第一消息为寻呼消息, 则第二传输单元 12在所述寻呼消息中携带 所述用户终端归属组的 Group ID,或者,携带所述用户终端归属组的 Group ID及下行数据 传输指示, 若所述第一消息为控制信道消息, 则第二传输单元 12在所述控制信道消息中 携带所述用户终端归属组的 Group ID。
基于图 2所示的网络侧架构, 较佳地, 第三传输单元 13按照所述下行数据传输调度 信息, 向用户终端传输下行数据, 包括:
第三传输单元 13 按照所述下行数据传输调度信息中指示的下行数据传输时长, 承载 下行数据传输的起始子帧位置, 以及下行数据传输间隔, 向用户终端传输下行数据。
基于图 2所示的网络侧架构, 较佳地, 第三传输单元 13按照所述下行数据传输调度 信息, 向用户终端传输下行数据, 包括:
第三传输单元 13 在所述下行数据传输调度信息指示的控制信道监听时长内, 按照所 述下行数据传输调度信息指示的物理资源位置, 通过控制信道向用户终端调度下行数据传 输; 以及
基于所述控制信道调度的资源向用户终端传输下行数据。
进一步的, 第二传输单元 12可以在所述第一消息中携带用以通知用户终端进行控制 信道寻址的无线网络临时标识符 RNTI时, 在通过控制信道向用户终端调度下行数据传输 的过程中, 釆用所述 RNTI对相应的控制信道进行加扰。
进一步的, 所述第三传输单元 13 可以在通过控制信道向用户终端调度下行数据传输 的过程中, 釆用规定的 RNTI对相应的控制信道加扰。 基于图 2所示的网络侧架构, 较佳地, 所述下行数据传输调度信息是基于组的下行数 据传输调度信息, 所述发送第一消息的时机的是根据所述用户终端的用户终端标识计算得 到的时机。
基于上述任一装置实施例, 较佳地, 第二传输单元 12在所述时机向用户终端发送所 述第一消息时, 若所述第一消息为寻呼消息, 则第二传输单元 12在所述寻呼消息中携带 所述用户终端的用户终端标识及下行数据传输指示, 若所述第一消息为控制信道消息, 则 第二传输单元 12在所述控制信道消息中携带所述用户终端的用户终端标识。
基于图 2所示的网络侧架构, 较佳地, 第三传输单元 13按照所述下行数据传输调度 信息, 向用户终端传输下行数据, 包括:
第三传输单元 13 利用如下公式确定开始发送数据时刻, 在如下公式确定的时间点, 按照所述下行数据传输调度信息中指示的下行数据传输时长, 承载下行数据传输的起始子 帧位置, 以及下行数据传输间隔, 向用户终端传输下行数据;
SFN mod m=0
其中, m为时间长度, 该时间长度为寻呼周期的整数倍。
基于图 3所示的装置架构, 本发明实施例用户终端的各功能模块的工作方式如下, 其 具体工作方式可以参照方法实施例的描述, 这里不再赘述。
基于图 3所示的装置架构, 较佳地, 第一通信单元 20通过系统消息或者无线资源控 制 RRC消息接收网络侧发送的所述下行数据传输调度信息。
基于图 3所示的装置架构, 较佳地, 所述第一通信单元 20接收的下行数据传输调度 信息为基于组的下行数据传输调度信息; 所述第二通信单元发送第一消息的时机的是根据 所述组对应的组标识 Group ID计算得到的时机。
基于图 3的上述任一实施例中, 较佳地, 第二通信单元 22在所述时机接收网络侧发 送的第一消息的过程中, 若所述第一消息为寻呼消息, 则第二通信单元 22在所述寻呼消 息中监测本地归属组的 Group ID ,或者,监测本地归属组的 Group ID及下行数据传输指示, 若所述第一消息为控制信道消息, 则第二通信单元 22在所述控制信道消息中监测本地归 属组的 Group ID。
基于图 3所示的装置架构, 较佳地, 第二通信单元 22在所述时机接收网络侧发送的 第一消息的过程中,若监测到所述第一消息中携带本地的终端标识 UE_ID和本地归属组的 Group ID , 则触发 RRC连接建立过程。
基于图 3所示的装置架构, 较佳地, 第三通信单元 23按照所述下行数据传输调度信 息, 接收网络侧传输的下行数据, 包括:
第三通信单元 23 在接收到所述第一消息的下一个子帧开始, 按照所述下行数据传输 调度信息中指示的下行数据传输时长, 承载下行数据传输的起始子帧位置, 以及下行数据 传输间隔, 接收网络侧传输的下行数据。
基于图 3所示的装置架构, 较佳地, 第三通信单元 23按照所述下行数据传输调度信 息, 接收网络侧传输的下行数据, 包括:
第三通信单元 23 在接收到所述第一消息的下一个子帧开始, 按照所述下行数据传输 调度信息指示的控制信道监听时长, 监测调度下行数据传输的控制信道的物理资源位置; 在所述物理资源位置接收到网络侧发送的控制信道信令时, 根据该控制信道信令接收 网络侧传输的下行数据。
进一步的, 第二通信单元 22在所述第一消息中进一步携带用以进行控制信道寻址的 无线网络临时标识符 RNTI时, 在监测调度下行数据传输的控制信道的物理资源位置的过 程中, 还包括釆用所述 RNTI对相应的控制信道进行解扰。
较佳地, 所述下行数据传输调度信息是基于组的下行数据传输调度信息, 所述发送第 一消息的时机的是根据自身的用户终端标识计算得到的时机。
较佳地, 第二通信单元 22在所述时机接收网络侧发送的第一消息的过程中, 若所述 第一消息为寻呼消息, 则第二通信单元 22在所述寻呼消息中监测自身的用户终端标识及 下行数据传输指示, 若所述第一消息为控制信道消息, 则第二通信单元 22在所述控制信 道消息中监测自身的用户终端标识。
较佳地, 第三通信单元 23 按照所述下行数据传输调度信息, 接收网络侧传输的下行 数据, 包括:
第三通信单元利用 23 如下公式确定开始发送数据时刻, 在如下公式确定的时间点, 按照所述下行数据传输调度信息中指示的下行数据传输时长, 承载下行数据传输的起始子 帧位置, 以及下行数据传输间隔, 接收网络侧传输的下行数据;
SFN mod m=0
其中, m为时间长度, 该时间长度为寻呼周期的整数倍。
综上所述, 本发明实施例中, 将属于同一用户, 或在一个区域范围内分布比较密集的 用户终端组成组,对于每一个组用一个 Group ID来唯一标识。用户终端在空闲状态下仍然 监听第一消息, 其中, 第一消息可以是寻呼消息, 也可以是控制信道消息。 用户终端除了 监听针对用户终端发送的寻呼消息外,同时还需要使用所归属组的 Group ID监听针对用户 终端归属组发送的第一消息。以寻呼消息为例,基站向某组中的用户终端传输下行数据时, 在该组的寻呼时机处寻呼该组用户终端,寻呼消息携带该组的 Group ID来通知该组内的所 有用户终端。 接收到该寻呼消息的用户终端可以在固定时长(即时间窗口, 也称时间窗) 内到固定的物理资源位置处接收下行数据 , 实现了减少在 M2M通信中基站向某组用户终 端传输数据时的网络资源浪费, 提高网络资源利用率的效果。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或计算机程序产 品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实 施例的形式。 而且, 本发明可釆用在一个或多个其中包含有计算机可用程序代码的计算机 可用存储介盾 (包括但不限于磁盘存储器、 CD-ROM、 光学存储器等)上实施的计算机程 序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实 施例的精神和范围。 这样, 倘若本发明实施例的这些修改和变型属于本发明权利要求及其 等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种下行数据传输方法, 其特征在于, 包括:
向用户终端发送下行数据传输调度信息;
获得相应的发送第一消息的时机, 所述第一消息用以指示终端侧接收下行数据; 在所述时机向用户终端发送第一消息;
按照所述下行数据传输调度信息, 向用户终端传输下行数据。
2、 如权利要求 1所述的方法, 其特征在于, 釆用系统消息或者无线资源控制 RRC消 息向用户终端发送所述下行数据传输调度信息。
3、 如权利要求 1 所述的方法, 其特征在于, 所述下行数据传输调度信息是基于组的 下行数据传输调度信息, 所述发送第一消息的时机的是根据所述组对应的组标识 Group ID 计算得到的时机。
4、 如权利要求 1、 2或 3的方法, 其特征在于, 在所述时机向用户终端发送所述第一 消息时, 若所述第一消息为寻呼消息, 则在所述寻呼消息中携带所述用户终端归属组的 Group ID, 或者, 携带所述用户终端归属组的 Group ID及下行数据传输指示, 若所述第一 消息为控制信道消息, 则在所述控制信道消息中携带所述用户终端归属组的 Group ID。
5、 如权利要求 1 所述的方法, 其特征在于, 按照所述下行数据传输调度信息, 向用 户终端传输下行数据, 包括:
按照所述下行数据传输调度信息中指示的下行数据传输时长, 承载下行数据传输的起 始子帧位置, 以及下行数据传输间隔, 向用户终端传输下行数据。
6、 如权利要求 1 所述的方法, 其特征在于, 按照所述下行数据传输调度信息, 向用 户终端传输下行数据, 包括:
在所述下行数据传输调度信息指示的控制信道监听时长内 , 按照所述下行数据传输调 度信息指示的物理资源位置, 通过控制信道向用户终端调度下行数据传输; 以及
基于所述控制信道调度的资源向用户终端传输下行数据。
7、 如权利要求 6 所述的方法, 其特征在于, 在所述第一消息中携带用以通知用户终 端进行控制信道寻址的无线网络临时标识符 RNTI时, 在通过控制信道向用户终端调度下 行数据传输的过程中, 釆用所述 RNTI对相应的控制信道进行加扰。
8、 如权利要求 6 所述的方法, 其特征在于, 在通过控制信道向用户终端调度下行数 据传输的过程中, 釆用规定的 RNTI对相应的控制信道加扰。
9、 如权利要求 1 所述的方法, 其特征在于, 所述下行数据传输调度信息是基于组的 下行数据传输调度信息, 所述发送第一消息的时机的是根据所述用户终端的用户终端标识 计算得到的时机。
10、 如权利要求 1、 2或 9的方法, 其特征在于, 在所述时机向用户终端发送所述第 一消息时, 若所述第一消息为寻呼消息, 则在所述寻呼消息中携带所述用户终端的用户终 端标识及下行数据传输指示, 若所述第一消息为控制信道消息, 则在所述控制信道消息中 携带所述用户终端的用户终端标识。
11、 如权利要求 1所述的方法, 其特征在于, 按照所述下行数据传输调度信息, 向用 户终端传输下行数据, 包括:
利用如下公式确定开始发送数据时刻, 在如下公式确定的时间点, 按照所述下行数据 传输调度信息中指示的下行数据传输时长, 承载下行数据传输的起始子帧位置, 以及下行 数据传输间隔, 向用户终端传输下行数据;
SFN mod m=0
其中, m为时间长度, 所述时间长度为寻呼周期的整数倍。
12、 一种下行数据传输方法, 其特征在于, 包括:
接收网络侧发送的下行数据传输调度信息;
获得相应的接收第一消息的时机, 所述第一消息用以指示终端侧接收下行数据; 在所述时机接收网络侧发送的第一消息;
按照所述下行数据传输调度信息, 接收网络侧传输的下行数据。
13、 如权利要求 12所述的方法, 其特征在于, 通过系统消息或者无线资源控制 RRC 消息接收网络侧发送的所述下行数据传输调度信息。
14、 如权利要求 12 所述的方法, 其特征在于, 所述下行数据传输调度信息是基于组 的下行数据传输调度信息; 所述发送第一消息的时机的是根据所述组对应的组标识 Group ID计算得到的时机。
15、 如权利要求 12、 13或 14所述的方法, 其特征在于, 在所述时机接收网络侧发送 的第一消息的过程中, 若所述第一消息为寻呼消息, 则在所述寻呼消息中监测本地归属组 的 Group ID, 或者, 监测本地归属组的 Group ID及下行数据传输指示, 若所述第一消息为 控制信道消息, 则在所述控制信道消息中监测本地归属组的 Group ID。
16、 如权利要求 12 所述的方法, 其特征在于, 在所述时机接收网络侧发送的第一消 息的过程中,若监测到所述第一消息中携带本地的终端标识 UE_ID和本地归属组的 Group ID, 则触发 RRC连接建立过程。
17、 如权利要求 12 所述的方法, 其特征在于, 按照所述下行数据传输调度信息, 接 收网络侧传输的下行数据, 包括:
在接收到所述第一消息的下一个子帧开始, 按照所述下行数据传输调度信息中指示的 下行数据传输时长, 承载下行数据传输的起始子帧位置, 以及下行数据传输间隔, 接收网 络侧传输的下行数据。
18、 如权利要求 12 所述的方法, 其特征在于, 按照所述下行数据传输调度信息, 接 收网络侧传输的下行数据, 包括:
在接收到所述第一消息的下一个子帧开始, 按照所述下行数据传输调度信息指示的控 制信道监听时长, 监测调度下行数据传输的控制信道的物理资源位置;
在所述物理资源位置接收到网络侧发送的控制信道信令时, 根据该控制信道信令接收 网络侧传输的下行数据。
19、 如权利要求 18 所述的方法, 其特征在于, 在所述第一消息中进一步携带用以进 行控制信道寻址的无线网络临时标识符 RNTI时, 在监测调度下行数据传输的控制信道的 物理资源位置的过程中, 还包括釆用所述 RNTI对相应的控制信道进行解扰。
20、 如权利要求 18 所述的方法, 其特征在于, 在监测调度下行数据传输的控制信道 的物理资源位置的过程中, 还包括釆用规定的 RNTI对相应的控制信道进行解扰。
21、 如权利要求 12 所述的方法, 其特征在于, 所述下行数据传输调度信息是基于组 的下行数据传输调度信息, 所述发送第一消息的时机的是根据自身的用户终端标识计算得 到的时机。
22、 如权利要求 12、 13或 21所述的方法, 其特征在于, 在所述时机接收网络侧发送 的第一消息的过程中, 若所述第一消息为寻呼消息, 则在所述寻呼消息中监测自身的用户 终端标识及下行数据传输指示, 若所述第一消息为控制信道消息, 则在所述控制信道消息 中监测自身的用户终端标识。
23、 如权利要求 12 所述的方法, 其特征在于, 按照所述下行数据传输调度信息, 接 收网络侧传输的下行数据, 包括:
利用如下公式确定开始发送数据时刻, 在如下公式确定的时间点, 按照所述下行数据 传输调度信息中指示的下行数据传输时长, 承载下行数据传输的起始子帧位置, 以及下行 数据传输间隔, 接收网络侧传输的下行数据;
SFN mod m=0
其中, m为时间长度, 所述时间长度为寻呼周期的整数倍。
24、 一种下行数据传输装置, 其特征在于, 包括:
第一传输单元, 用于向用户终端发送下行数据传输调度信息;
获取单元, 用于获得相应的发送第一消息的时机, 所述第一消息用以指示终端侧接收 下行数据;
第二传输单元, 用于在所述时机向用户终端发送第一消息;
第三传输单元, 用于按照所述下行数据传输调度信息, 向用户终端传输下行数据。
25、 如权利要求 24所述的装置, 其特征在于, 第一传输单元釆用系统消息或者无线资 源控制 RRC消息向用户终端发送所述下行数据传输调度信息。
26、 如权利要求 24 所述的装置, 其特征在于, 所述第一传输单元发送的下行数据传 输调度信息是基于组的下行数据传输调度信息; 所述获取单元获得的发送第一消息的时机 的是根据所述组对应的组标识 Group ID计算得到的时机。
27、 如权利要求 24、 25或 26所述的装置, 其特征在于, 第二传输单元在所述时机向 用户终端发送所述第一消息时, 若所述第一消息为寻呼消息, 则第二传输单元在所述寻呼 消息中携带所述用户终端归属组的 Group ID, 或者, 携带所述用户终端归属组的 Group ID 及下行数据传输指示, 若所述第一消息为控制信道消息, 则第二传输单元在所述控制信道 消息中携带所述用户终端归属组的 Group ID。
28、 如权利要求 25 所述的装置, 其特征在于, 第三传输单元按照所述下行数据传输 调度信息, 向用户终端传输下行数据, 包括:
第三传输单元按照所述下行数据传输调度信息中指示的下行数据传输时长, 承载下行 数据传输的起始子帧位置, 以及下行数据传输间隔, 向用户终端传输下行数据。
29、 如权利要求 25 所述的装置, 其特征在于, 第三传输单元按照所述下行数据传输 调度信息, 向用户终端传输下行数据, 包括:
第三传输单元在所述下行数据传输调度信息指示的控制信道监听时长内, 按照所述下 行数据传输调度信息指示的物理资源位置, 通过控制信道向用户终端调度下行数据传输; 以及
基于所述控制信道调度的资源向用户终端传输下行数据。
30、 如权利要求 29 所述的装置, 其特征在于, 第二传输单元在所述第一消息中携带 用以通知用户终端进行控制信道寻址的无线网络临时标识符 RNTI时, 在通过控制信道向 用户终端调度下行数据传输的过程中, 釆用所述 RNTI对相应的控制信道进行加扰。
31、 如权利要求 29 所述的装置, 其特征在于, 所述第三传输单元在通过控制信道向 用户终端调度下行数据传输的过程中, 釆用规定的 RNTI对相应的控制信道加扰。
32、 如权利要求 24 所述的装置, 其特征在于, 所述下行数据传输调度信息是基于组 的下行数据传输调度信息, 所述发送第一消息的时机的是根据所述用户终端的用户终端标 识计算得到的时机。
33、 如权利要求 24、 25或 32的装置, 其特征在于, 第二传输单元在所述时机向用户 终端发送所述第一消息时, 若所述第一消息为寻呼消息, 则第二传输单元在所述寻呼消息 中携带所述用户终端的用户终端标识及下行数据传输指示, 若所述第一消息为控制信道消 息, 则第二传输单元在所述控制信道消息中携带所述用户终端的用户终端标识。
34、 如权利要求 33 所述的装置, 其特征在于, 第三传输单元按照所述下行数据传输 调度信息, 向用户终端传输下行数据, 包括: 第三传输单元利用如下公式确定开始发送数据时刻, 在如下公式确定的时间点, 按照 所述下行数据传输调度信息中指示的下行数据传输时长, 承载下行数据传输的起始子帧位 置, 以及下行数据传输间隔, 向用户终端传输下行数据;
SFN mod m=0
其中, m为时间长度, 所述时间长度为寻呼周期的整数倍。
35、 一种下行数据传输装置, 其特征在于, 包括:
第一通信单元, 用于接收网络侧发送的下行数据传输调度信息;
获取单元, 用于获得相应的接收第一消息的时机, 所述第一消息用以指示终端侧接收 下行数据;
第二通信单元, 用于在所述时机接收网络侧发送的第一消息;
第三通信单元, 用于按照所述下行数据传输调度信息, 接收网络侧传输的下行数据。
36、 如权利要求 35 所述的装置, 其特征在于, 第一通信单元通过系统消息或者无线 资源控制 RRC消息接收网络侧发送的所述下行数据传输调度信息。
37、 如权利要求 35 所述的装置, 其特征在于, 所述第一通信单元接收的下行数据传 输调度信息为基于组的下行数据传输调度信息; 所述第二通信单元发送第一消息的时机的 是根据所述组对应的组标识 Group ID计算得到的时机。
38、 如权利要求 35、 36或 38所述的装置, 其特征在于, 第二通信单元在所述时机接 收网络侧发送的第一消息的过程中, 若所述第一消息为寻呼消息, 则第二通信单元在所述 寻呼消息中监测本地归属组的 Group ID,或者,监测本地归属组的 Group ID及下行数据传 输指示, 若所述第一消息为控制信道消息, 则第二通信单元在所述控制信道消息中监测本 地归属组的 Group ID。
39、 如权利要求 35 所述的装置, 其特征在于, 第二通信单元在所述时机接收网络侧 发送的第一消息的过程中,若监测到所述第一消息中携带本地的终端标识 UE_ID和本地归 属组的 Group ID , 则触发 RRC连接建立过程。
40、 如权利要求 35 所述的装置, 其特征在于, 第三通信单元按照所述下行数据传输 调度信息, 接收网络侧传输的下行数据, 包括:
第三通信单元在接收到所述第一消息的下一个子帧开始, 按照所述下行数据传输调度 信息中指示的下行数据传输时长, 承载下行数据传输的起始子帧位置, 以及下行数据传输 间隔, 接收网络侧传输的下行数据。
41、 如权利要求 35 所述的装置, 其特征在于, 第三通信单元按照所述下行数据传输 调度信息, 接收网络侧传输的下行数据, 包括:
第三通信单元在接收到所述第一消息的下一个子帧开始, 按照所述下行数据传输调度 信息指示的控制信道监听时长, 监测调度下行数据传输的控制信道的物理资源位置; 在所述物理资源位置接收到网络侧发送的控制信道信令时, 根据该控制信道信令接收 网络侧传输的下行数据。
42、 如权利要求 41 所述的装置, 其特征在于, 第二通信单元在所述第一消息中进一 步携带用以进行控制信道寻址的无线网络临时标识符 RNTI时, 在监测调度下行数据传输 的控制信道的物理资源位置的过程中,还包括釆用所述 RNTI对相应的控制信道进行解扰。
43、 如权利要求 35 所述的装置, 其特征在于, 所述下行数据传输调度信息是基于组 的下行数据传输调度信息, 所述发送第一消息的时机的是根据自身的用户终端标识计算得 到的时机。
44、 如权利要求 35、 36或 43所述的装置, 其特征在于, 第二通信单元在所述时机接 收网络侧发送的第一消息的过程中, 若所述第一消息为寻呼消息, 则第二通信单元在所述 寻呼消息中监测自身的用户终端标识及下行数据传输指示, 若所述第一消息为控制信道消 息, 则第二通信单元在所述控制信道消息中监测自身的用户终端标识。
45、 如权利要求 35 所述的装置, 其特征在于, 第三通信单元按照所述下行数据传输 调度信息, 接收网络侧传输的下行数据, 包括:
第三通信单元利用如下公式确定开始发送数据时刻, 在如下公式确定的时间点, 按照 所述下行数据传输调度信息中指示的下行数据传输时长, 承载下行数据传输的起始子帧位 置, 以及下行数据传输间隔, 接收网络侧传输的下行数据;
SFN mod m=0
其中, m为时间长度, 所述时间长度为寻呼周期的整数倍。
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