WO2017107115A1 - 一种下行紧急业务传输方法、基站、用户设备及系统 - Google Patents

一种下行紧急业务传输方法、基站、用户设备及系统 Download PDF

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Publication number
WO2017107115A1
WO2017107115A1 PCT/CN2015/098516 CN2015098516W WO2017107115A1 WO 2017107115 A1 WO2017107115 A1 WO 2017107115A1 CN 2015098516 W CN2015098516 W CN 2015098516W WO 2017107115 A1 WO2017107115 A1 WO 2017107115A1
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Prior art keywords
base station
resource
emergency service
user equipment
reserved
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PCT/CN2015/098516
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English (en)
French (fr)
Inventor
王新征
邓天乐
周凯捷
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/098516 priority Critical patent/WO2017107115A1/zh
Priority to CN201580085354.3A priority patent/CN108432275B/zh
Priority to EP15911114.5A priority patent/EP3386224B1/en
Publication of WO2017107115A1 publication Critical patent/WO2017107115A1/zh
Priority to US16/015,628 priority patent/US10313863B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/50—Connection management for emergency connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a downlink emergency service transmission method, a base station, a user equipment, and a system.
  • Emergency service transmission such as transmission of certain alarm information in industrial control, is an application scenario for future 4.5G and 5G communication systems.
  • the amount of data to be transmitted by the emergency service is small each time, but it must be quickly transmitted. Short transmission delays are an important feature of emergency services.
  • a base station when a base station sends a non-emergency service to a user equipment (User Equipment, UE), that is, a traditional data service in an existing communication system, such as a mobile broadband (MBB) service, due to current TTI system resources. Already allocated, the base station usually needs to wait for the next Transmission Time Interval (TTI) to obtain idle resources, and finally use the idle resources to send downlink services.
  • TTI Transmission Time Interval
  • the transmission method of the downlink service of the prior art is inefficient. If the downlink emergency service is transmitted by using the prior art, the transmission of the downlink emergency service may be delayed, so that the UE cannot process the downlink emergency service in time.
  • the embodiment of the invention provides a downlink emergency service transmission method, a base station, a user equipment and a system.
  • the first aspect provides a downlink emergency service transmission method, which is applied to a base station side, and includes: the base station reserves reserved resources for transmitting downlink emergency services from the system resources, and sends the first indication information to the user equipment, The user equipment is instructed to receive the downlink emergency service by using the resource indicated by the first indication information, and then the base station sends the downlink emergency service to the user equipment by using the reserved resource.
  • the first indication information is used to indicate the reserved resource.
  • the base station when the base station has a downlink emergency service to be sent to the user equipment, the base station may directly send the reserved resource to the user equipment in the current transmission interval. Downstream emergency services, enabling timely delivery of downlink emergency services.
  • the user equipment is notified by the base station, that is, the indication information of the reserved resource, that is, the first indication information, that the user equipment only needs to monitor whether the emergency service is sent to the user on the reserved resource. It is not necessary to search for the emergency service sent to itself on the entire system resource. For example, in the LTE communication system, the user equipment can avoid obtaining the emergency service sent to itself through the full-band search, and reduce the design of the user equipment receiving the emergency service. Difficulty.
  • the second aspect provides a downlink emergency service transmission method, which is applied to the user equipment side, and includes: the user equipment receives the first indication information sent by the base station, and indicates, by using the first indication information, according to the first indication information.
  • the resource receives the downlink emergency service sent by the base station.
  • the first indication information is used to indicate a reserved resource;
  • the reserved resource is a reserved resource reserved by the base station from a system resource for transmitting a downlink emergency service.
  • the base station reserves resources for the downlink emergency service, and when the base station has an emergency service to be sent to the user equipment, the reserved resource may be directly used to the user in the current transmission interval.
  • the device sends the downlink emergency service to implement timely transmission of downlink emergency services.
  • the user equipment because the user equipment has already obtained the indication information of the reserved resource, that is, the first indication information, the user equipment only needs to monitor whether there is an emergency service sent to itself on the reserved resource. It is not necessary to search for the emergency service sent to itself on the entire system resource. For example, in the LTE communication system, the user equipment can avoid obtaining the emergency service sent to itself through the full-band search, and reduce the design difficulty of the user equipment receiving the emergency service. .
  • the reserved resources are not excessive, and the transmission of the emergency service can be supported, thereby avoiding wasting system resources.
  • the reserved resources need to be capable of supporting at least the transmission of control information of emergency services.
  • the base station may send, by using the resource indicated by the first indication information, control information of a downlink emergency service to the user equipment, where the control information includes second indication information, to indicate the user.
  • the device receives the data information of the downlink emergency service by using the resource indicated by the second indication information.
  • the second indication information is used to indicate resources occupied by data information of the downlink emergency service.
  • the user equipment can receive the control of the downlink emergency service by using the reserved resource.
  • the control information includes the second indication information, and receives the data information of the downlink emergency service by using the resource indicated by the second indication information according to the second indication information.
  • the second indication information is used to indicate resources occupied by data information of the downlink emergency service.
  • part or all of the data information of the downlink emergency service may be transmitted through the unreserved resource.
  • the base station may only transmit data information of the downlink emergency service through the conflicting resource, and not send the non-emergency service.
  • the base station may further send third indication information, that is, indication information of the conflicting resource, to the user equipment that originally received the non-emergency service by using the conflicting resource, to notify the The resource indicated by the third indication information of the user equipment is occupied, and the data transmitted on the occupied resource is not the non-emergency service that the user equipment expects to receive, so that the user equipment ignores the data on the occupied resource.
  • third indication information that is, indication information of the conflicting resource
  • a base station comprising means for performing the method of the first aspect.
  • a user equipment comprising means for performing the method of the second aspect.
  • a base station for performing the downlink emergency service transmission method described in the first aspect.
  • the base station can include: a memory and a processor, a transmitter, and a receiver coupled to the memory, wherein: the transmitter is configured to transmit a mobile communication signal to a user equipment, and the receiver is configured to receive the user equipment to transmit Mobile communication signal for storing implementation code of the downlink emergency service transmission method described in the first aspect, the processor for executing program code stored in the memory, that is, performing the downlink emergency service described in the first aspect Transmission method.
  • a user equipment for performing the downlink emergency service transmission method described in the second aspect.
  • the user equipment includes a memory and a processor, a transmitter and a receiver coupled to the memory, wherein: the transmitter is configured to transmit a mobile communication signal to a base station, and the receiver is configured to receive a mobile communication transmitted by the base station a signal for storing an implementation code of a downlink emergency service transmission method described in the second aspect, the processor for executing a process stored in the memory The sequence code, that is, the downlink emergency service transmission method described in the second aspect.
  • the seventh aspect provides a communication system, comprising: the base station according to the third aspect, and the user equipment according to the fourth aspect; or the base station according to the fifth aspect, User equipment.
  • the base station and the user equipment are in a long term evolution LTE communication system; in a single transmission interval, the reserved resource is M symbols in a time domain and N in a frequency domain.
  • the reserved resource may occupy all the symbols of the physical shared channel, and does not occupy the symbol of the physical control channel, so that an unpredictable burst of emergency services can be transmitted in time, and the non-intrusive Transmission of control information for emergency services.
  • the base station may send, by using the K resource factors RE, control information of the downlink emergency service to the user equipment, where the control information includes:
  • the second indication information is used to indicate which resource factor REs occupied by the data information are.
  • the downlink emergency service can be used to occupy the time-frequency resources of the LTE system as little as possible, thereby avoiding waste of system resources.
  • the user equipment can find the resource factor RE occupied by the data information according to the second indication information included in the control information, and can receive the resource factor RE occupied by the data information. Data information.
  • the base station may also pass the K The resource factor RE transmits part or all of the data information of the downlink emergency service, so that the K resource factor REs reserved may be fully utilized.
  • control information and the data information may occupy the same symbol, and synchronous transmission of the control information and the data information may be implemented.
  • the base station and the user equipment are in a unified mobile communication system UMTS; in a single transmission interval, the reserved resource is a downlink expansion of the base station from the unified mobile communication system.
  • the available spreading code for transmitting the downlink emergency service is reserved in the frequency code.
  • the base station may send, by using the reserved spreading code, control information of the downlink emergency service to the user equipment, where
  • the control information includes: indication information of a spreading code occupied by data information of the downlink emergency service, and a device identifier of the user equipment.
  • the downlink emergency service can be used to occupy the downlink spreading code resource of the UMTS system as little as possible, thereby avoiding waste of system resources.
  • the user equipment can find the spreading code occupied by the data information according to the second indication information included in the control information, and can receive the spreading code by using the spreading code occupied by the data information. Data information.
  • the base station may also pass The reserved spreading code sends part or all of the data information of the downlink emergency service to the user equipment, so that the reserved spreading code can be fully utilized.
  • the base station and the user equipment are in a global mobile communication system GSM; in a single transmission interval, the reserved resource is a data frame transmitted by the base station from the single transmission interval.
  • a time slot reserved for transmitting the downlink emergency service which is reserved in a plurality of time slots.
  • the base station may send, by using the reserved time slot, control information of the downlink emergency service to the user equipment, where the control information includes: The indication information of the time slot occupied by the data information of the downlink emergency service, and the device identifier of the user equipment.
  • the downlink emergency service can be used to occupy the time slot resources of the GSM system as little as possible, thereby avoiding waste of system resources.
  • the user equipment can find the time slot occupied by the data information according to the second indication information included in the control information, and can receive the data by using a time slot occupied by the data information. information.
  • the base station or the user equipment may also be transmitted through the reserved time slot, so that the reserved time slot can be fully utilized.
  • a computer readable storage medium storing program code for implementing the emergency service transmission method described in the first aspect, the program code comprising operating the emergency service transmission described in the first aspect The execution instruction of the method.
  • a ninth aspect a computer readable storage medium storing program code for implementing the emergency service transmission method described in the second aspect, the program code comprising operating the emergency service transmission described in the second aspect The execution instruction of the method.
  • the reserved resource may be a statically configured resource of the base station, and the reserved resource may also be a resource dynamically configured by the base station.
  • the base station may send the first indication information to the UE by using the following two manners, that is, notifying the UE by using the reserved resource: 1.
  • the base station sends the foregoing to the UE by using a radio resource control RRC message or a broadcast message.
  • An indication information which may be applicable to a static configuration of the reserved resource by the base station, that is, the scenario in which the reserved resource does not change in a long time; 2.
  • the base station sends the UE to the UE through the control channel.
  • the first indication information is used in this manner, so that the base station can re-select the resources reserved for the emergency service from the system resources according to the scheduling situation of the system resources every other transmission period, thereby realizing the dynamic configuration of the reserved resources.
  • the base station may send the re-adjusted indication information of the reserved resource to the user equipment by using a control channel in each transmission interval.
  • the base station may also distribute the indication information of the reserved resource in frequency and time to obtain a diversity gain.
  • the base station reserves the reserved resource for transmitting the downlink emergency service from the system resource.
  • the base station can directly send the reserved resource to the user equipment.
  • the downlink emergency service can improve the transmission efficiency of the downlink emergency service and ensure the timely transmission of the downlink emergency service.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a downlink emergency service transmission method according to an embodiment of the present invention
  • FIG. 3A is a schematic diagram of allocation of LTE downlink time-frequency resources according to an embodiment of the present invention.
  • FIG. 3B is a schematic diagram of another LTE time-frequency resource allocation according to an embodiment of the present invention.
  • FIG. 3C is a schematic diagram of another LTE time-frequency resource allocation according to an embodiment of the present invention.
  • 4A is a schematic diagram of a UMTS spreading code tree according to an embodiment of the present invention.
  • 4B is a schematic diagram of an HS-PDSCH data frame of a UMTS according to an embodiment of the present invention
  • 4C is a schematic diagram of a DPCH data frame of a UMTS according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a GSM data frame according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another base station according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 1 shows a communication system according to an embodiment of the present invention, in which a base station and a UE communicate with each other through some air interface technology.
  • the air interface technology may include: existing 2G (such as GSM), 3G (such as UMTS, WCDMA, TD-SCDMA), 4G (such as FDD LTE, TDD LTE), and upcoming 4.5G, 5G systems, and the like.
  • the base station may include an eNB in an LTE communication system, a NodeB in a UMTS communication system, and a BS (Base Station) in a GSM communication system.
  • the UE is a user terminal in a 3G and 4G network, which is equivalent to a mobile station (Mobile Station, MS) in a 2G network, and may include a wireless terminal such as a mobile phone or a tablet (with a SIM card), or may be a machine-to-machine ( M2M, Machine to Machine) Wireless terminals in communication (such as sensors, meters that can be metered remotely), and other mobile communication devices.
  • a wireless terminal such as a mobile phone or a tablet (with a SIM card)
  • M2M Machine to Machine
  • Wireless terminals in communication such as sensors, meters that can be metered remotely
  • M2M Machine to Machine
  • the base station reserves reserved resources for transmitting downlink emergency services from the system resources, that is, the reserved resources are not subjected to non-emergency services.
  • the base station can directly send the downlink emergency service to the user equipment through the reserved resource when the base station needs to send the emergency service to the user equipment.
  • the resource involved in the embodiment of the present invention may be a time-frequency resource (such as RB or RE) in the LTE system, or may be a spreading code in the UMTS system. It can also be a time slot resource in the GSM system.
  • the reserved resource may also be other types of air interface resources, which are not limited herein.
  • the transmission method of the downlink emergency service shown in FIG. 2 includes:
  • the base station reserves reserved resources for transmitting downlink emergency services from the system resources.
  • the base station sends the first indication information to the UE, to indicate that the UE receives the downlink emergency service by using the resource indicated by the first indication information, that is, the reserved resource.
  • the first indication information is used to indicate which resources the reserved resource is.
  • the base station receives an instruction to send a downlink emergency service to the UE.
  • the base station may send the downlink emergency service to the UE by using the resource indicated by the first indication information, in response to the instruction received in S105.
  • the UE may receive the downlink emergency service by using the resource indicated by the first indication information.
  • the UE may monitor whether there is an emergency service sent to the resource indicated by the first indication information, if the UE detects the first If there is a downlink emergency service sent to itself on the resource indicated by the indication information, execution S109 is triggered.
  • the UE due to the first indication information, the UE only needs to monitor whether there is an emergency service sent to itself on the reserved resource, and does not need to search for the emergency service sent to itself on the entire system resource, thereby reducing The complexity of the UE receiving emergency services.
  • the base station may send the first indication information to the UE by using the following two manners, that is, the reserved resource is notified to the UE:
  • the base station sends the first indication information to the UE by using a radio resource control (RRC) message or a broadcast message.
  • RRC radio resource control
  • the method may be applicable to the base station to statically configure the reserved resource, that is, the reserved resource. In a scene that does not change over a long period of time;
  • the base station sends the first indication information to the UE through the control channel. In this manner, the base station can re-select the resources reserved for the emergency service from the system resources according to the scheduling situation of the system resources every other transmission period. Dynamic configuration of reserved resources.
  • the base station can periodically configure the reserved resources, for example, every other TTI or one data frame, or a non-periodic configuration. Resources.
  • the base station By implementing the transmission method of the downlink emergency service shown in FIG. 2, when the emergency service is to be sent to the UE, the base station does not need to wait for the idle resource of the next TTI, but directly sends the downlink emergency to the UE through the reserved resource in the current TTI.
  • the service can implement the fast transmission of the downlink emergency service.
  • the UE can implement the simple and fast reception of the emergency service only by monitoring the reserved resource, thereby reducing the design complexity of the UE.
  • the downlink emergency service may include: control information and data information.
  • the control information of the downlink emergency service may include information indicating a modulation and coding mode, a redundancy version of the HARQ retransmission, and the like, and may also include indication information of the resource occupied by the data information.
  • the indication information is referred to as the second indication information. .
  • the second indication information related to the embodiment of the present invention is used to indicate which resources are occupied by the data information.
  • control information includes the second indication information, that is, the indication information of the data information of the emergency service
  • the UE can find the resource used by the data information of the emergency service according to the second indication information, and Data information can be received through resources used by data information.
  • the reserved resources are not excessive, and the transmission of the downlink emergency service can be supported, thereby avoiding wasting system resources.
  • the reserved resources need to support at least the transmission of control information of downlink emergency services.
  • the size of the reserved resource may be determined according to the data amount of the control information of the downlink emergency service and the total data amount of all the information (control information and data information), so that the reserved resource can support The amount of data transmitted is greater than or equal to the amount of data of the control information, and does not exceed the total amount of data of the downlink emergency service. It should be noted that the size of the reserved resource may be determined according to the actual application requirement or the transmission experience of the downlink emergency service, and the like, which is not limited in the embodiment of the present invention.
  • the base station may send the control information to the UE by using the resource indicated by the first information, that is, the reserved resource.
  • the UE may receive the control information by using the resource indicated by the first indication information, that is, the reserved resource, and, because the control information includes the second indication information, the UE may The second indication information receives the data information by using the resource indicated by the second indication information.
  • part or all of the data information of the downlink emergency service may be transmitted through the unreserved resource.
  • the non-reserved resource refers to system resources other than the reserved resource, and may include: Non-reserved resources allocated to non-emergency services and non-reserved resources not allocated to non-emergency services.
  • the base station may only send the downlink emergency service data information through the conflicting resource, instead of transmitting the non-emergency service.
  • Other non-emergency services that are not sent through the conflicting resources are still transmitted normally and are not affected.
  • the base station may further include the indication information indicating the conflicting resource, and the indication information is referred to as the third indication information in the embodiment of the present invention, and is sent to the user equipment that receives the non-emergency service.
  • the user equipment is notified that the resource indicated by the third indication information is occupied, and the data transmitted on the occupied resource is not the non-emergency service that the user equipment is expected to receive, so that the user equipment ignores the occupied Data on the resource.
  • the third indication information is used to indicate the occupied resource, and the occupied resource is the conflicting resource.
  • the base station may further notify the non-reserved resource occupied by the downlink emergency service, except that the third indication information is notified to the user equipment that receives the non-emergency service through the conflicting resource.
  • Other information such as occupied non-reserved resources is also notified to the user equipment that receives the non-emergency service.
  • the user equipment that receives the non-emergency service by using the conflicting resource may request the base station to retransmit the non-emergency service, to implement the correctness of the non-emergency service. receive.
  • the base station may transmit part of the data information of the downlink emergency service through the reserved resource, and another part. Data information is transmitted through the non-reserved resources.
  • the resource indicated by the second indication information may include two parts, where part is a reserved resource occupied by the data information, and another part is a non-reserved resource occupied by the data information.
  • Embodiments of the present invention are used to reserve downlink emergency services from system resources by using a base station.
  • the reserved resource the base station may directly send the downlink emergency service to the UE by using the reserved resource, improve the transmission efficiency of the downlink emergency service, and implement timely transmission of the downlink emergency service; and, the base station will reserve the The indication information of the resource is sent to the UE, so that the UE only needs to monitor whether there is a downlink emergency service sent to itself on the reserved resource, and does not need to search on the entire system resource, thereby reducing the design complexity of the UE.
  • Embodiments of the inventive method in an LTE (4G) communication system are described in detail below in conjunction with Figures 3A-3C.
  • FIG. 3A illustrates an allocation of downlink time-frequency resources in an LTE system.
  • the first N (N between 1-4) OFDM symbols are used to pass the PDCCH, and the remaining OFDM symbols are used to deliver the PDSCH.
  • one TTI is the transmission duration of one data frame.
  • the reserved resource 401 in FIG. 3A is a time-frequency resource reserved by the base station for downlink emergency services. As shown in FIG. 3A, within a single TTI, the reserved resource 401 may occupy X OFDM symbols in the time domain and Y subcarriers in the frequency domain.
  • the Z resource factors RE formed by the intersection of the X OFDM symbols and the Y subcarriers in the frequency domain; X, Y, and Z are positive integers, where Z X*Y. That is to say, the reserved resource 401 is composed of Z resource factors (REs).
  • the reserved resource 401 can occupy all the OFDM symbols of the PDSCH, and does not occupy the OFDM symbol of the PDCCH, so that the downlink emergency service with unpredictable bursts can be sent in time, and the control information of the non-emergency service is not affected.
  • control information 402 and the data information 403 may occupy the same OFDM symbol as shown in FIG. 3A, and synchronous transmission of the control information 402 and the data information 403 may be implemented.
  • control information 402 and the data information 403 may also occupy different SC-FDMA symbols, that is, there is a delay between the control information 402 and the data information 403.
  • the control information 402 occupies the i-th SC-FDMA symbol
  • the data information 403 occupies the i+1th SC-FDMA symbol
  • the control information 402 and the data information 403 can both pass the reserved resource 401.
  • Transmission, transmission of emergency services does not affect the transmission of non-emergency services, i is a positive integer.
  • i is a positive integer.
  • the example is only one implementation of the embodiment of the present invention, and may be different in practical applications.
  • the downlink emergency service since the downlink emergency service requires a short transmission time, the downlink emergency service needs to occupy as few SC-FDMA symbols as possible.
  • the control information 402 and the data information 403 occupy a total of one SC-FDMA symbol.
  • the reserved resource 401 if the RE on the SC-FDMA symbol is insufficient to support the transmission of all data (control information 402 and data information 403) of the downlink emergency service, the UE may pass the reserved resource 401.
  • the RE occupied by the non-emergency service on the SC-FDMA symbol transmits part or all of the data information 403. That is to say, the part or all of the data information 403 may use the same time-frequency resources as the downlink non-emergency services of other users, resulting in resource conflicts.
  • the base station may only send the part or all of the data information 403 on the RE where the resource conflict occurs, and not the downlink non-emergency service of the other user.
  • the base station may further send the third indication information to the user equipment that originally received the non-emergency service by using the conflicting resource, to notify the user equipment that the resource indicated by the third indication information is occupied, and is occupied.
  • the data transmitted on the resource is not the non-emergency service that the user equipment expects to receive, so that the user equipment ignores the data on the occupied resource.
  • the user equipment that originally received the non-emergency service through the conflicting resource may request the base station to retransmit the non-emergency service, to implement the non-emergency service. Correct reception.
  • the control information of the downlink emergency service further needs to carry the user equipment identifier (UE ID).
  • the user equipment identifier may be hidden in the CRC.
  • the CRC is scrambled by the amount related to the UE ID, so that the UE that receives the non-emergency service can be configured to parse the control information of the downlink emergency service.
  • FIG. 3B illustrates another allocation of downlink time-frequency resources in the LTE system.
  • the base station can simultaneously transmit downlink emergency services to two UEs, such as UE3 and UE4 in FIG. 3B, in one symbol.
  • the base station may also send downlink emergency services to two or more UEs simultaneously in one symbol.
  • the REs occupied by the reserved resources may be statically configured, that is, remain unchanged for a long time; It may also be that the base station dynamically selects from the system resources according to the scheduling situation of the system resources. Take it. It should be noted that the base station can reserve resources periodically, for example, every other TTI or one data frame, or dynamically allocate resources in a non-periodic manner.
  • the transmission period of the data frame may be changed.
  • the base station may send the indication information 404 of the reserved resource to the UE through the control channel (PDCCH) in each TTI, that is, the foregoing An indication message.
  • the indication information 404 of the reserved resource can also be distributedly transmitted in frequency and time to obtain the diversity gain.
  • the method for transmitting the downlink emergency service provided by the present invention is implemented in the LTE system, and the time-frequency resource for transmitting the downlink emergency service is reserved from the time-frequency resource of the LTE system, and the base station receives the transmission to the UE in the current TTI. After the downlink emergency service is instructed, the base station can directly send the downlink emergency service to the UE through the reserved time-frequency resource, improve the transmission efficiency of the downlink emergency service, and implement timely transmission of the downlink emergency service.
  • the implementation of the method of the present invention in a UMTS (3G) communication system is briefly described below in conjunction with Figures 4A-4C.
  • the UMTS communication system is a code division multiple access (CDMA) communication method, and the resources involved are mainly spreading codes.
  • CDMA code division multiple access
  • FIG. 4A shows a spreading code tree in a UMTS communication system, where the spreading code is expressed as: C ch, SF, k , SF is a Spreading Factor (SF), and k is a code channel. number.
  • the spreading code is expressed as: C ch, SF, k , SF is a Spreading Factor (SF), and k is a code channel. number.
  • the uplink code resources are very rich, and one UE corresponds to one spreading code tree.
  • the downlink code resource is very limited, and one cell corresponds to one spreading code tree.
  • the base station may reserve an available (not occupied) spreading code for transmitting the downlink emergency service from the downlink spreading code provided by the system, and the reserved extension The frequency code will not be occupied by non-emergency services.
  • the reserved spreading code is the reserved resource.
  • the base station may select a spreading code of C ch, 4, 0 from the downlink spreading code tree shown in FIG. 4A as a spreading code for transmitting downlink emergency services.
  • the base station may reserve a spreading code for transmitting the downlink emergency service from the High Speed Physical Downlink Shared Channel (HS-PDSCH).
  • the spreading factor of the high-speed physical downlink shared channel HS-PDSCH is 16, that is, each cell can allocate up to 15 HS-PDSCH channels.
  • the base station may reserve an HS-PDSCH spreading code for transmitting downlink emergency services from the 15 HS-PDSCH channels.
  • the base station reserves a spreading code for transmitting the downlink emergency service from the HS-PDSCH downlink spreading code tree: C ch, 16 , 3 , and reserves the 4th code channel of the HS-PDSCH for the downlink emergency service.
  • the examples are only one implementation of the present invention, and may be different in practical applications and should not be construed as limiting.
  • the base station may reserve a spreading code for transmitting downlink emergency services from a Dedicated Physical Channel (DPCH).
  • DPCH Dedicated Physical Channel
  • the SF of the DPCH is between 4 and 512, and the DPCH sent by the base station to different UEs has different spreading factors (determined by the service rate) and the spreading code. Then, the base station may reserve a spreading code for transmitting the downlink emergency service corresponding to each UE from the DPCH corresponding to each UE.
  • the SF of the DPCH of the UE1 is 256
  • the spreading code reserved for the UE1 for transmitting the downlink emergency service is: C ch, 256 , 127 , that is, the 128th code channel of the DPCH of the UE1 is reserved for the downlink corresponding to the UE1.
  • Downstream emergency services are only one implementation of the present invention, and may be different in practical applications and should not be construed as limiting.
  • the base station may reserve other types of downlink spreading codes for the downlink emergency service, for example, the shared control channel (HS-SCCH) corresponding to the shared control channel (HS-SCCH).
  • HS-SCCH shared control channel
  • Frequency code there is no limit here.
  • the base station may reserve one or at least two spreading codes for transmitting downlink emergency services.
  • the data transmission rate of the code channel corresponding to the reserved spreading code for transmitting the downlink emergency service is not excessive, and the transmission of the downlink emergency service can be supported, thereby avoiding wasting system resources.
  • the code channel corresponding to the reserved spreading code needs to support at least the transmission of the control information of the downlink emergency service.
  • the base station may send the downlink emergency service to the UE by using the reserved spreading code in the current TTI.
  • the base station may transmit the downlink emergency service through the reserved spreading code (the spreading code corresponding to the HS-PDSCH) in the slot 1 of the HS-PDSCH data frame shown in FIG. 4B.
  • the base station may pass the reserved spread spectrum in the time slot i (i is a positive integer) of the DPCH data frame shown in FIG. 4C.
  • the code (which belongs to the spreading code corresponding to the DPCH) transmits the downlink emergency service.
  • the example is only one implementation manner of the embodiment of the present invention, and may be different in practical applications, and should not be construed as limiting.
  • the base station may transmit part or all of the data information of the downlink emergency service by using the downlink spreading code other than the reserved spreading code, and the part or all of the data information may be downlinked with other users.
  • Non-emergency services use the same spreading code, causing resource conflicts.
  • the base station may only send the part or all of the data information on the spreading code in which the resource conflict occurs, and not the downlink non-emergency service of the other user.
  • the base station may also pass the reserved The spreading code sends part or all of the data information of the downlink emergency service to the UE.
  • the amount of data that the base station can transmit in slot 1 (Slot1) of the HS-PDSCH data frame shown in FIG. 4B is 320 bits, and if the control information of the downlink emergency service is 64 bits (less than 320 bits), the base station also Part or all of the data information of the downlink emergency service can be transmitted in the time slot 1 through the reserved spreading code.
  • 4C is 80 bits, and if the control information of the downlink emergency service is 64 bits (less than 80 bits), the base station It is also possible to transmit part or all of the data information of the downlink emergency service through the reserved spreading code in the time slot i.
  • the example is only one implementation manner of the embodiment of the present invention, and may be different in practical applications, and should not be construed as limiting.
  • the control information of the downlink emergency service needs to carry the user equipment identifier (UE ID).
  • UE ID user equipment identifier
  • the method for transmitting the downlink emergency service provided by the present invention is implemented in the UMTS system, and the spreading code for transmitting the downlink emergency service is reserved from the downlink spreading code resource of the UMTS system, and the base station receives the direction in the current TTI. After the UE transmits the downlink emergency service command, the base station can directly send the downlink emergency service to the UE by using the reserved spreading code, so that the downlink emergency service can be transmitted in time.
  • the implementation of the method of the present invention in a GSM (2G) communication system is briefly described below in conjunction with FIG.
  • the GSM communication system is a Time Division Multiple Access (TDMA) communication method, and the resources involved are mainly time slots.
  • TDMA Time Division Multiple Access
  • a data frame includes 8 time slots, that is, 8 physical channels.
  • the time length of one time slot is 0.577 ms.
  • Multiple frames may constitute a multiframe.
  • 26 multiframes consist of 26 TDMA multiframes with a time interval of 120 ms.
  • the base station may reserve time slots for transmitting downlink emergency services from multiple time slots included in the data frame (such as time slot 3 in FIG. 5).
  • the reserved time slot is the reserved resource.
  • the base station may reserve one or at least two time slots for transmitting downlink emergency services.
  • the time slot reserved for transmitting the downlink emergency service is not excessive, and the transmission of the downlink emergency service can be supported, thereby avoiding wasting system resources.
  • the reserved time slots need to support at least the transmission of control information of downlink emergency services.
  • the base station may transmit part or all of the data information of the downlink emergency service by using the time slot other than the reserved time slot, and the part or all of the data information may be related to the downlink non-emergency service of other users. Using the same time slot results in resource conflicts. In order to ensure the priority transmission of the downlink emergency service, the base station may only send the part or all of the data information in the time slot in which the resource conflict occurs, and not the downlink non-emergency service of the other user.
  • the base station may further use the reserved time slot to The UE sends part or all of the data information of the downlink emergency service.
  • the amount of data that the base station can transmit in time slot 3 of the GSM data frame shown in FIG. 5 is 156.25 bits, and if the control information of the downlink emergency service is 64 bits (less than 156.25 bits), the base station can also pass the time slot. 3 Transmit some or all of the data information of the downlink emergency service.
  • the example is only one implementation manner of the embodiment of the present invention, and may be different in practical applications, and should not be construed as limiting.
  • the control information of the downlink emergency service needs to carry the user equipment identifier (UE ID).
  • the method for transmitting the downlink emergency service provided by the present invention in the GSM system by reserving the time slot resource for transmitting the downlink emergency service, after the base station receives the instruction for transmitting the downlink emergency service to the UE in the current TTI, the base station
  • the downlink tightness can be directly sent to the UE through the reserved time slot. Urgent business, can achieve timely transmission of downlink emergency services.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station 60 may include: a reservation unit 601 and a sending unit 603, where:
  • a reservation unit 601 configured to reserve reserved resources for transmitting downlink emergency services from system resources;
  • the sending unit 603 is configured to send the first indication information to the user equipment, to indicate that the user equipment receives the downlink emergency service by using the resource indicated by the first indication information, where the first indication information is used to indicate the reserved resource;
  • the sending unit 603 is further configured to send the downlink emergency service to the user equipment by using the reserved resource.
  • the downlink emergency service may include: control information and data information.
  • the control information of the downlink emergency service may include information indicating a modulation and coding mode, a redundancy version of the HARQ retransmission, and the like, and may also include indication information of resources occupied by the data information, that is, the second indication information.
  • the reserved resources are not excessive, and the transmission of the downlink emergency service can be supported, thereby avoiding wasting system resources.
  • the reserved resources need to support at least the transmission of control information of downlink emergency services.
  • the sending unit 603 may be specifically configured to: send the control information of the downlink emergency service to the user equipment by using the reserved resource, where the control information includes second indication information, And the user equipment is used to receive the data information of the downlink emergency service by using the resource indicated by the second indication information.
  • the second indication information may be used to indicate resources occupied by the data information.
  • the resource occupied by the data information of the downlink emergency service may include: a non-reserved resource, where the non-reserved resource is a system resource other than the reserved resource.
  • the sending unit 603 may be specifically configured to send only the data information by using a non-reserved resource that conflicts, and not send the downlink non-emergency service.
  • the sending unit 603 is further configured to send third indication information to the user equipment that receives the non-emergency service, to notify the user that receives the non-emergency service.
  • the resource indicated by the third indication information is occupied, and the data transmitted on the occupied resource is not the non-emergency service that the user equipment expects to receive, so that the user equipment ignores the data on the occupied resource.
  • the third indication information is used to indicate the non-reserved resources that are occupied.
  • the sending unit 603 may be specifically used to pass the pre-control, in addition to the control information of the emergency service.
  • the resource is reserved to transmit part or all of the data of the downlink emergency service.
  • the reserved resource may be a statically configured resource of the reservation unit 601; or the reserved resource may be a resource dynamically configured by the reservation unit 601.
  • the reserved resource involved in the embodiment of the present invention may be a time-frequency resource (such as an RB or an RE) in the LTE system, a spreading code in the UMTS system, or a time slot resource in the GSM system.
  • the reserved resource may also be other types of air interface resources, which are not limited herein.
  • a user equipment is provided in the embodiment of the present invention, where the user equipment may include: a receiving unit, where:
  • the receiving unit is configured to receive first indication information that is sent by the base station, where the first indication information is used to indicate a reserved resource, and the reserved resource is reserved by the base station from the system resource for transmitting downlink Reserved resources for emergency services;
  • the receiving unit is further configured to receive the downlink emergency service sent by the base station by using the resource indicated by the first indication information according to the first indication information.
  • the downlink emergency service may include: control information and data information.
  • the control information of the downlink emergency service may include information indicating a modulation and coding mode, a redundancy version of the HARQ retransmission, and the like, and may also include indication information of resources occupied by the data information, that is, the second indication information.
  • the reserved resources are not excessive, and the transmission of the downlink emergency service can be supported, thereby avoiding wasting system resources.
  • the reserved resources need to support at least the transmission of control information of downlink emergency services.
  • the base station may use the reserved resource to use the The user equipment sends control information of the downlink emergency service.
  • the receiving unit is configured to: receive the control information of the downlink emergency service by using the resource indicated by the first indication information according to the first indication information.
  • the receiving unit may be further configured to receive, according to the second indication information, the data information by using the resource indicated by the second indication information, according to the second indication information.
  • the second indication information may be used to indicate resources occupied by data information of the downlink emergency service.
  • the base station further transmits the part of the downlink emergency service by using the reserved resource or All data information.
  • the receiving unit is further configured to receive part or all of the data information of the downlink emergency service by using the reserved resource.
  • the reserved resource may be a statically configured resource of the base station; or the reserved resource may be a dynamically configured resource of the base station.
  • the reserved resource involved in the embodiment of the present invention may be a time-frequency resource (such as an RB or an RE) in the LTE system, a spreading code in the UMTS system, or a time slot resource in the GSM system.
  • the reserved resource may also be other types of air interface resources, which are not limited herein.
  • the specific implementation manner of the receiving unit may refer to the content of the foregoing method embodiments and the implementation details of the foregoing methods in the existing communication systems, and details are not described herein again.
  • the present invention provides a base station and user equipment, which are used in the downlink emergency service transmission method provided by the embodiment of the present invention.
  • the base station 1100 can include a network interface 1102, a base station processor 1104, a transmitter 1106, a receiver 1108, a coupler 1110, an antenna 1112, and a memory 1114.
  • these components may be connected by a bus or other means, wherein the connection by bus is exemplified in FIG.
  • the network interface 1102 is used for base station 1100 to perform data communication with user equipments (UEs in mobile stations MS, 3G, and 4G in 2G).
  • the network interface 1102 may include one or more of a GSM (2G) wireless network interface, a WCDMA (3G) wireless network interface, and an LTE (4G) wireless network interface, etc., or may be 4.5G or 5G wireless network interface.
  • the antenna 1112 is used to convert electromagnetic energy in the transmission line into electromagnetic waves in free space, or The electromagnetic waves in the space are converted into electromagnetic energy in the transmission line; the coupler 1110 is used to divide the mobile signal into multiple channels and distribute it to a plurality of receivers 1108.
  • the transmitter 1106 is configured to perform a transmission process (eg, modulation) on the mobile communication signal generated by the base station processor 1104, and the receiver 1108 is configured to perform a reception process (eg, demodulation) on the mobile communication signal received by the antenna 1112, which can be regarded as A wireless modem.
  • the number of transmitters 1106 or receivers 1108 may be one or more.
  • the memory 1114 is configured to store program code.
  • the memory 1114 can be a read only memory (ROM), and can be used to store program code.
  • the base station processor 1104 is configured to perform radio channel management, implement call establishment and teardown of the communication link, and control the handover of the user equipment in the control area.
  • the base station processor 1104 may include: an AM/CM module (a center for voice exchange and information exchange), and a BM module (for completing call processing, signaling processing, radio resource management, and wireless link management). And circuit maintenance functions), TCSM module (for multiplexing and demultiplexing and code conversion functions) and other modules.
  • the base station processor 1104 is further configured to invoke the program code stored in the memory 1114 to perform the following steps:
  • the first indication information is sent to the user equipment by the transmitter 1106, to indicate that the user equipment receives the downlink emergency service by using the resource indicated by the first indication information; the first indication information is used to indicate the reserved resource;
  • the downlink emergency service is sent to the user equipment by using the reserved resource by the transmitter 1106.
  • the downlink emergency service may include: control information and data information.
  • the control information of the downlink emergency service may include information indicating a modulation and coding mode, a redundancy version of the HARQ retransmission, and the like, and may also include indication information of resources occupied by the data information, that is, the second indication information.
  • the reserved resources are not excessive, and the transmission of the downlink emergency service can be supported, thereby avoiding wasting system resources.
  • the reserved resources need to support at least the transmission of control information of downlink emergency services.
  • the base station processor 1104 may use the transmitter 1106 to send control information of the downlink emergency service to the user equipment by using the preset resource.
  • the control information includes second indication information, which is used to indicate that the user equipment receives the data information of the downlink emergency service by using the resource indicated by the second indication information. This The second indication information may be used to indicate resources occupied by the data information.
  • the resource occupied by the data information of the downlink emergency service may include: a non-reserved resource, where the non-reserved resource is a system resource other than the reserved resource.
  • the base station processor 1104 can utilize the transmitter 1106 to transmit only the data information through conflicting non-reserved resources without transmitting downlink non-emergency services.
  • the base station processor 1104 may use the transmitter 1106 to send the third indication information to the user equipment that receives the non-emergency service, to notify the user equipment that receives the non-emergency service that the third The resource indicated by the indication information is occupied, and the data transmitted on the occupied resource is not the non-emergency service expected by the user equipment, so that the user equipment ignores the data on the occupied resource.
  • the third indication information is used to indicate the non-reserved resource in which the conflict occurs.
  • the base station processor 1104 can use the transmitter 1106 to pass the control information in addition to the emergency service control information.
  • the reserved resource transmits part or all of the data information of the downlink emergency service.
  • the reserved resource may be a statically configured resource of the base station processor 1104; or the reserved resource may be a resource dynamically configured by the base station processor 1104.
  • the reserved resource involved in the embodiment of the present invention may be a time-frequency resource (such as an RB or an RE) in the LTE system, a spreading code in the UMTS system, or a time slot resource in the GSM system.
  • the reserved resource may also be other types of air interface resources, which are not limited herein.
  • the base station 60 can be applied to a 2G communication system (such as GSM), a 3G communication system (such as UMTS), and a 4G communication system (LTE), or a future 4.5G or 5G communication system.
  • a 2G communication system such as GSM
  • a 3G communication system such as UMTS
  • a 4G communication system LTE
  • the user equipment 1200 may include: an input and output module (including an audio input and output module) 1218, key input module 1216 and display 1220, etc.), user interface 1202, mobile processor 1204, transmitter 1206, receiver 1208, coupler 1210, antenna 1214, and memory 1212.
  • these components may be connected by a bus or other means, wherein the connection by bus is exemplified in FIG.
  • the antenna 1214 is configured to convert electromagnetic energy in the transmission line into electromagnetic waves in free space, or convert electromagnetic waves in free space into electromagnetic energy in the transmission line;
  • the coupler 1210 is configured to divide the mobile communication signal into multiple channels and distribute the signals to multiple Receiver 1208.
  • the transmitter 1206 is configured to perform a transmission process (eg, modulation) on the mobile communication signal generated by the mobile processor 1204, and the receiver 1208 is configured to perform a reception process (eg, demodulation) on the mobile communication signal received by the antenna 1214, which can be regarded as A wireless modem.
  • the number of the transmitters 1206 or the receivers 1208 may be one or more.
  • the input and output module is mainly used to implement the interaction function between the user equipment 1200 and the user/external environment, and mainly includes an audio input and output module 1218, a key input module 1216, and a display 1220.
  • the input and output module may further include: a camera, a touch screen, a sensor, and the like.
  • the input and output modules communicate with the mobile processor 1204 through the user interface 1202.
  • Memory 1212 is coupled to mobile processor 1204 for storing various software programs and/or sets of instructions.
  • memory 1212 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
  • the mobile processor 1204 is mainly used to call a program stored in the memory 1212, and performs the following steps:
  • the receiver 1208 Receiving, by the receiver 1208, the first indication information sent by the base station; the first indication information is used to indicate a reserved resource; the reserved resource is reserved by the base station from the system resource for transmitting the downlink emergency service. Reserve resources;
  • the downlink emergency service may include: control information and data information.
  • the control information of the downlink emergency service may include information indicating a modulation and coding mode, a redundancy version of the HARQ retransmission, and the like, and may also include indication information of resources occupied by the data information, that is, the second indication information.
  • the reserved resources are not excessive, and the transmission of the downlink emergency service can be supported, thereby avoiding wasting system resources.
  • the reserved resources need to support at least the transmission of control information of downlink emergency services.
  • the base station may send, by using the reserved resource, control information of the downlink emergency service to the user equipment 1200.
  • the mobile processor 1204 can use the receiver 1208 to receive the control information of the downlink emergency service through the reserved resource. Since the control information includes second indication information, the mobile processor 1204 can also receive, by the receiver 1208, the data information by using the resource indicated by the second indication information.
  • the second indication information may be used to indicate resources occupied by data information of the downlink emergency service.
  • the base station further transmits the part of the downlink emergency service by using the reserved resource or All data information. Then, correspondingly, the mobile processor 1204 can also use the receiver 1208 to receive some or all of the data information of the downlink emergency service through the reserved resource.
  • the reserved resource may be a statically configured resource of the base station; or the reserved resource may be a dynamically configured resource of the base station.
  • the reserved resource involved in the embodiment of the present invention may be a time-frequency resource (such as an RB or an RE) in the LTE system, a spreading code in the UMTS system, or a time slot resource in the GSM system.
  • the reserved resource may also be other types of air interface resources, which are not limited herein.
  • the user equipment 1200 may be a mobile station in a 2G communication system (such as GSM), a UE in a 3G communication system (such as UMTS) and a 4G communication system (LTE), or may be a future 4.5G or User terminal in a 5G communication system.
  • a 2G communication system such as GSM
  • a UE in a 3G communication system such as UMTS
  • a 4G communication system LTE
  • LTE 4G communication system
  • an embodiment of the present invention further provides a communication system (shown in FIG. 1), where the communication system includes: a base station and a user equipment.
  • the base station may also be the base station 1100 described in FIG. 7
  • the user equipment may also be the user equipment 1200 described in FIG.
  • the base station may be a base station involved in all the foregoing content, where the user equipment may The user equipment involved in all the above contents is not described here.
  • the base station reserves the reserved resource for transmitting the downlink emergency service from the system resource, and the base station can directly send the downlink emergency service to the user equipment by using the reserved resource.
  • the transmission efficiency of the downlink emergency service is improved, and the downlink emergency service can be transmitted in time; and the indication information of the reserved resource is notified to the user equipment by the base station, so that the user equipment only needs to monitor whether the reserved resource is on the reserved resource.
  • the downlink emergency service is sent to itself without searching on the entire system resources, which reduces the design complexity of the user equipment.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明实施例公开一种下行紧急业务传输方法及系统。所述方法包括：基站从系统资源中预留出用于传输下行紧急业务的预留资源；所述基站向用户设备发送第一指示信息，用以指示所述用户设备通过第一指示信息指示的资源接收下行紧急业务；所述第一指示信息用于指示所述预留资源；所述基站通过所述预留资源向所述用户设备发送下行紧急业务。本发明方案可提高下行紧急业务的传输效率，保证下行紧急业务的及时传输。

Description

一种下行紧急业务传输方法、基站、用户设备及系统 技术领域
本发明涉及通信技术领域，尤其涉及一种下行紧急业务传输方法、基站、用户设备及系统。
背景技术
紧急业务传输，例如传输工业控制中的某些告警信息，是未来4.5G和5G通信系统的一个应用场景。紧急业务每次所要传输的数据量小，但是必须快速传完。传输时延短是紧急业务的一个重要特征。
现有技术中，当基站向用户设备(User Equipment，UE)发送非紧急业务时，即现有通信系统中的传统数据业务，如移动宽带(Mobile Broadband，MBB)业务，由于当前TTI的系统资源已经被分配占用，基站通常需要等待下一个传输间隔(Transmission Time Interval，TTI)甚至更久来获得空闲资源，最后利用空闲资源发送下行业务。现有技术的这种下行业务的发送方法效率低，如果利用现有技术传输下行紧急业务，会导致下行紧急业务的传输出现延迟，使得UE无法及时处理下行紧急业务。
发明内容
本发明实施例提供了一种下行紧急业务传输方法、基站、用户设备及系统。
第一方面，提供了一种下行紧急业务传输方法，应用于基站侧，包括：基站从系统资源中预留出用于传输下行紧急业务的预留资源，并向用户设备发送第一指示信息，用以指示所述用户设备通过第一指示信息指示的资源接收下行紧急业务，之后所述基站通过所述预留资源向所述用户设备发送下行紧急业务。
这里，所述第一指示信息用于指示所述预留资源。
通过实施第一方面描述的方法，当所述基站有下行紧急业务要发送给所述用户设备时，可直接在当前传输间隔内通过所述预留资源向用户设备发送所述 下行紧急业务，实现下行紧急业务的及时发送。
并且，通过所述基站将所述预留资源的指示信息，即所述第一指示信息，告知用户设备，所述用户设备只需要在所述预留资源上监测是否有发向自己的紧急业务，而不需要在整个系统资源上搜索发向自己的紧急业务，例如，在LTE通信系统中用户设备可以避免通过全频段搜索来获取发向自己的紧急业务，降低了用户设备接收紧急业务的设计难度。
第二方面，提供了一种下行紧急业务传输方法，应用于用户设备侧，包括：用户设备接收基站发送的第一指示信息，并根据所述第一指示信息，通过所述第一指示信息指示的资源接收所述基站发送的下行紧急业务。
这里，所述第一指示信息用于指示预留资源；所述预留资源是所述基站从系统资源中预留出的用于传输下行紧急业务的预留资源。
通过实施第二方面描述的方法，通过基站为下行紧急业务预留资源，当所述基站有紧急业务要发送给所述用户设备时，可直接在当前传输间隔内通过所述预留资源向用户设备发送所述下行紧急业务，实现下行紧急业务的及时发送。
并且，可以理解的，由于用户设备已经获知所述预留资源的指示信息，即所述第一指示信息，因此用户设备只需要在所述预留资源上监测是否有发向自己的紧急业务，而不需要在整个系统资源上搜索发向自己的紧急业务，例如，在LTE通信系统中用户设备可以避免通过全频段搜索来获取发向自己的紧急业务，降低了用户设备接收紧急业务的设计难度。
可以理解的，所述预留资源不宜过多，能够支撑紧急业务的传输即可，避免浪费系统资源。但是，为了保证紧急业务的正确高效的传输，所述预留资源需要至少能够支持紧急业务的控制信息的传输。
在一种实现方式中，所述基站可以通过所述第一指示信息指示的资源向所述用户设备发送下行紧急业务的控制信息，所述控制信息包括第二指示信息，用以指示所述用户设备通过所述第二指示信息指示的资源接收下行紧急业务的数据信息。这里，所述第二指示信息用于指示所述下行紧急业务的数据信息占用的资源。
相应的，所述用户设备可以通过所述预留资源接收所述下行紧急业务的控 制信息，所述控制信息包括第二指示信息，并根据所述第二指示信息，通过所述第二指示信息指示的资源接收下行紧急业务的数据信息。这里，所述第二指示信息用于指示所述下行紧急业务的数据信息占用的资源。
在本发明实施例中，下行紧急业务的部分或全部数据信息可以通过非预留资源传输。
在一种实现方式中，如果下行紧急业务的数据信息占用的非预留资源也被分配给了非紧急业务，则会存在下行资源冲突。在发生下行资源冲突时，为了优先保证下行紧急业务的正确传输，所述基站可以通过发生冲突的资源仅发送下行紧急业务的数据信息，而不发送非紧急业务。
在一种实现方式中，如果下行资源冲突，所述基站还可以向原来通过所述冲突资源接收非紧急业务的用户设备发送第三指示信息，即所述冲突资源的指示信息，用以告知该用户设备所述第三指示信息指示的资源被占用，被占用的资源上传输的数据不是该用户设备预期接收的非紧急业务，以使该用户设备忽略所述被占用的资源上的数据。
第三方面，提供了一种基站，所述基站包括用于执行第一方面所述方法的单元。
第四方面，提供了一种用户设备，所述用户设备包括用于执行第二方面所述方法的单元。
第五方面，提供了一种基站，用于执行第一方面描述的下行紧急业务传输方法。所述基站可包括：存储器以及与所述存储器耦合的处理器、发射器和接收器，其中：所述发射器用于与向用户设备发送移动通信信号，所述接收器用于接收所述用户设备发送的移动通信信号，所述存储器用于存储第一方面描述的下行紧急业务传输方法的实现代码，所述处理器用于执行所述存储器中存储的程序代码，即执行第一方面描述的下行紧急业务传输方法。
第六方面，提供了一种用户设备，用于执行第二方面描述的下行紧急业务传输方法。所述用户设备包括存储器以及与所述存储器耦合的处理器、发射器和接收器，其中：所述发射器用于与向基站发送移动通信信号，所述接收器用于接收所述基站发送的移动通信信号，所述存储器用于存储第二方面描述的下行紧急业务传输方法的实现代码，所述处理器用于执行所述存储器中存储的程 序代码，即执行第二方面描述的下行紧急业务传输方法。
第七方面，提供了一种通信系统，所述通信系统包括：第三方面所述的基站和第四方面所述的用户设备；或者，第五方面所述的基站和第六方面所述的用户设备。
在一种可能的实现方式中，所述基站与所述用户设备处于长期演进LTE通信系统中；在单个传输间隔内，所述预留资源是时域上的M个符号和频域上的N个子载波相交形成的K个资源因子RE；M，N，K均是正整数，其中K＝M*N。
可选的，在单个传输间隔内，所述预留资源可占用物理共享信道的全部符号，不占用物理控制信道的符号，可实现及时传输不可预料的突发的紧急业务，同时也不影响非紧急业务的控制信息的传输。
在LTE通信系统中的一种可能的实施方式中，所述基站可以通过所述K个资源因子RE向所述用户设备发送所述下行紧急业务的控制信息；其中，所述控制信息包括：所述第二指示信息，所述第二指示信息用于指示数据信息占用的资源因子RE是哪些。
这样可实现所述下行紧急业务尽量少的占用LTE系统的时频资源，避免系统资源浪费。并且，可以理解的，所述用户设备能够根据所述控制信息包含的所述第二指示信息找到所述数据信息占用的资源因子RE，并能通过所述数据信息占用的资源因子RE接收到所述数据信息。
在LTE通信系统中的一种可能的实施方式中，如果预留出的所述K个资源因子RE能够支持传输的数据量大于所述控制信息的数据量，所述基站还可以通过所述K个资源因子RE传输所述下行紧急业务的部分或全部数据信息，可实现充分利用预留出的所述K个资源因子RE。
在LTE通信系统中的一种可能的实施方式中，所述控制信息和所述数据信息可以占用相同的符号，可实现所述控制信息和所述数据信息的同步发送。
在一种可能的实现方式中，所述基站与所述用户设备处于统一移动通信系统UMTS中；在单个传输间隔内，所述预留资源是所述基站从所述统一移动通信系统的下行扩频码中预留出的可用的用于传输所述下行紧急业务的扩频码。
在UMTS通信系统中的一种可能的实施方式中，所述基站可以通过所述预留出的扩频码向所述用户设备发送所述下行紧急业务的控制信息；其中，所述 控制信息包括：所述下行紧急业务的数据信息占用的扩频码的指示信息，以及所述用户设备的设备标识。
这样可实现所述下行紧急业务尽量少的占用UMTS系统的下行扩频码资源，避免系统资源浪费。并且，可以理解的，所述用户设备能够根据所述控制信息包含的所述第二指示信息找到所述数据信息占用的扩频码，并能通过所述数据信息占用的扩频码接收到所述数据信息。
在UMTS通信系统中的一种可能的实施方式中，如果所述预留出的扩频码能够支持传输的数据量大于所述下行紧急业务的控制信息的数据量，则所述基站还可以通过所述预留出的扩频码向所述用户设备发送所述下行紧急业务的部分或全部数据信息，可实现充分利用所述预留出的扩频码。
在一种可能的实现方式中，所述基站与所述用户设备处于全球移动通信系统GSM中；在单个传输间隔内，所述预留资源是所述基站从所述单个传输间隔传输的数据帧包括的多个时隙中预留出的用于传输所述下行紧急业务的时隙。
在GSM通信系统中的一种可能的实施方式中，所述基站可以通过所述预留出的时隙向所述用户设备发送所述下行紧急业务的控制信息；其中，所述控制信息包括：所述下行紧急业务的数据信息占用的时隙的指示信息，以及所述用户设备的设备标识。
这样可实现所述下行紧急业务尽量少的占用GSM系统的时隙资源，避免系统资源浪费。并且，可以理解的，所述用户设备能够根据所述控制信息包含的所述第二指示信息找到所述数据信息占用的时隙，并能通过所述数据信息占用的时隙接收到所述数据信息。
在GSM通信系统中的一种可能的实施方式中，如果所述预留出的时隙能够传输的数据量大于所述下行紧急业务的控制信息的数据量，则所述基站或所述用户设备还可以通过所述预留出的时隙传输所述下行紧急业务的部分或全部数据信息，可实现充分利用所述预留出的时隙。
第八方面，提供了一种计算机可读存储介质，所述可读存储介质上存储有实现第一方面描述的紧急业务传输方法的程序代码，该程序代码包含运行第一方面描述的紧急业务传输方法的执行指令。
第九方面，提供了一种计算机可读存储介质，所述可读存储介质上存储有实现第二方面描述的紧急业务传输方法的程序代码，该程序代码包含运行第二方面描述的紧急业务传输方法的执行指令。
在本发明实施例的一些可能的实现方式中，所述预留资源可以是所述基站静态配置的资源，所述预留资源也可以是所述基站动态配置的资源。
具体的，所述基站可以通过下述2种方式向UE发送所述第一指示信息，即将所述预留资源告知UE：1.基站通过无线资源控制RRC消息或广播消息向UE发送所述第一指示信息，此方式可以适用于基站对所述预留资源进行静态配置中，即所述预留资源在较长时间内不会发生改变的场景中；2.基站通过控制信道向UE发送所述第一指示信息，采用这种方式使得基站可以每隔一个传输周期根据系统资源的调度情况重新从系统资源中选取出预留给紧急业务的资源，实现预留资源的动态配置。
例如，所述基站可以在每个传输间隔中通过控制信道向所述用户设备发送重新调整的所述预留资源的指示信息。并且，与非紧急业务的控制信息一样，所述基站也可以在频率和时间上分散发送所述预留资源的指示信息，以获得分集增益。
实施本发明实施例，通过基站从系统资源中预留出用于传输下行紧急业务的预留资源，当基站需要向用户设备发送紧急业务时，基站可以直接通过所述预留资源向用户设备发送所述下行紧急业务，可提高下行紧急业务的传输效率，保证下行紧急业务的及时传输。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍。
图1是本发明实施例涉及的通信系统的示意图；
图2是本发明实施例提供的一种下行紧急业务传输方法的流程示意图；
图3A是本发明实施例提供的一种LTE下行时频资源的分配示意图；
图3B是本发明实施例提供的另一种LTE时频资源的分配示意图；
图3C是本发明实施例提供的再一种LTE时频资源的分配示意图；
图4A是本发明实施例提供的一种UMTS扩频码树的示意图；
图4B是本发明实施例涉及的UMTS的HS-PDSCH数据帧示意图；
图4C是本发明实施例涉及的UMTS的DPCH数据帧示意图；
图5是本发明实施例涉及的GSM数据帧示意图
图6是本发明实施例提供的一种基站的结构示意图；
图7是本发明实施例提供的另一种基站的结构示意图；
图8是本发明实施例涉及的一种用户设备的结构示意图。
具体实施方式
本发明的实施方式部分使用的术语仅用于对本发明的具体实施例进行解释，而非旨在限定本发明。下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚地描述。
参见图1，图1示出了本发明实施例涉及的通信系统，其中，基站与UE通过某种空口技术相互通信。所述空口技术可包括：现有的2G(如GSM)、3G(如UMTS、WCDMA、TD-SCDMA)、4G(如FDD LTE、TDD LTE)以及未来即将面市的4.5G、5G系统等。基站可包括：LTE通信系统中的eNB、UMTS通信系统中的NodeB和GSM通信系统中的BS(Base Station)。UE即是3G和4G网络中的用户终端，相当于2G网络中的移动台(Mobile Station，MS)，可包括：手机、平板电脑(携带SIM卡)等无线终端，也可以是机器对机器(M2M，Machine to Machine)通信中的无线终端(例如传感器，能远程抄表的仪表)，以及其他移动通信设备。
下面先介绍本发明提供的下行紧急业务发送方法的总体构思，后续再详细说明本发明方法分别在LTE(4G)、UMTS(3G)和GSM(2G)这三种通信系统中的实施方式。
首先，结合图2说明本发明提供的下行紧急业务发送方法的总体构思：基站从系统资源中预留出用于传输下行紧急业务的预留资源，即所述预留资源不会被非紧急业务占用，当基站需要向用户设备发送紧急业务时，基站可直接通过所述预留资源向用户设备发送下行紧急业务。本发明实施例涉及的资源可以是LTE系统中的时频资源(如RB或RE)，也可以是UMTS系统中的扩频码， 还可以是GSM系统中的时隙资源。实际应用中，所述预留资源还可以是其他形式的空中接口资源，这里不作限制。
参见图2，图2示出的下行紧急业务的传输方法包括：
S101，基站从系统资源中预留出用于传输下行紧急业务的预留资源。
S103，基站向UE发送第一指示信息，用以指示UE通过所述第一指示信息指示的资源，即所述预留资源，接收下行紧急业务。这里，所述第一指示信息用于指示所述预留资源是哪些资源。
S105，基站接收到向UE发送下行紧急业务的指令。
S107，响应S105中接收到的指令，基站可以通过所述第一指示信息指示的资源向UE发送所述下行紧急业务。
S109，相应的，UE可以通过所述第一指示信息指示的资源接收所述下行紧急业务。
在一种实现方式中，在接收到基站发送的所述第一指示信息之后，UE可以监测所述第一指示信息指示的资源上是否有发向自己的紧急业务，如果UE监测到所述第一指示信息指示的资源上存在发向自己的下行紧急业务，则触发执行S109。
可以理解的，由于有所述第一指示信息，UE只需要在所述预留资源上监测有无发给自己的紧急业务，而不需要在整个系统资源上搜索发向自己的紧急业务，降低了UE接收紧急业务的复杂度。
具体的，基站可以通过下述2种方式向UE发送所述第一指示信息，即将所述预留资源告知UE：
1.基站通过无线资源控制(Radio Resource Control，RRC)消息或广播消息向UE发送所述第一指示信息，此方式可以适用于基站对所述预留资源进行静态配置，即所述预留资源在较长时间内不会发生改变的场景中；
2.基站通过控制信道向UE发送所述第一指示信息，采用这种方式使得基站可以每隔一个传输周期根据系统资源的调度情况重新从系统资源中选取出预留给紧急业务的资源，实现预留资源的动态配置。
需要说明的，在实现预留资源的动态配置时，基站既可以周期性的配置预留资源，例如每隔1个TTI或1个数据帧进行配置，也可以非周期性的配置预留 资源。
通过实施图2所示的下行紧急业务的传输方法，基站有紧急业务要发送给UE时，无需等待下一个TTI的空闲资源，而是直接在当前TTI通过所述预留资源向UE发送下行紧急业务，实现下行紧急业务的快速发送；相应的，UE可以仅通过监测所述预留资源来实现紧急业务的简单快速的接收，降低了UE的设计复杂度。
本发明实施例中，下行紧急业务可以包括：控制信息和数据信息。下行紧急业务的控制信息既可以包括指示调制编码方式、HARQ重传的冗余版本等信息，也可以包含数据信息占用的资源的指示信息，本发明实施例将该指示信息称为第二指示信息。本发明实施例涉及的所述第二指示信息用于指示数据信息占用的资源是哪些。
可以理解的，由于所述控制信息包含所述第二指示信息，即紧急业务的数据信息的指示信息，因此，UE能够根据所述第二指示信息找到紧急业务的数据信息所使用的资源，并能通过数据信息使用的资源接收到数据信息。
本发明实施例中，所述预留资源不宜过多，能够支撑下行紧急业务的传输即可，避免浪费系统资源。但是，为了保证下行紧急业务的正确高效的传输，所述预留资源需要至少能够支持下行紧急业务的控制信息的传输。在一种实现方式中，可以根据下行紧急业务的控制信息的数据量和全部信息(控制信息和数据信息)的总数据量确定出所述预留资源的大小，使得所述预留资源能够支撑传输的数据量大于或等于控制信息的数据量，且不超过下行紧急业务的所述总数据量。需要说明的，也可以根据实际应用需求或者下行紧急业务的传输经验等来确定出所述预留资源的大小，本发明实施例不作限制。
具体的，基站可通过所述第一信息指示的资源，即所述预留资源，向UE发送所述控制信息。相应的，UE可以通过所述第一指示信息指示的资源，即所述预留资源，接收到所述控制信息，并且，由于所述控制信息包含所述第二指示信息，因此，UE可以根据所述第二指示信息，通过所述第二指示信息指示的资源接收所述数据信息。
在本发明实施例中，下行紧急业务的部分或全部数据信息可以通过非预留资源传输。这里，非预留资源是指所述预留资源之外的系统资源，可包括：已 经分配给非紧急业务的非预留资源、未分配给非紧急业务的非预留资源。
本发明实施例中，如果下行紧急业务的数据信息占用的非预留资源也被分配给了非紧急业务，则会存在下行资源冲突。也即是说，分配给下行的非紧急业务的资源与分配给所述部分或全部数据信息的资源存在部分或全部相同时，则出现下行资源冲突。在发生下行资源冲突时，为了优先保证下行紧急业务的正确传输，基站可以通过冲突资源仅发送下行紧急业务的数据信息，而不发送非紧急业务。其他未通过所述冲突资源发送的非紧急业务依旧正常传输，不受影响。
实际应用中，如果下行资源冲突，所述基站还可以将指示所述冲突资源的指示信息，本发明实施例将该指示信息称为第三指示信息，发送给接收所述非紧急业务的用户设备，用以告知该用户设备所述第三指示信息指示的资源被占用，被占用的资源上传输的数据不是该用户设备预期接收的所述非紧急业务，以使该用户设备忽略所述被占用资源上的数据。这里，所述第三指示信息用于指示所述被占用的资源，所述被占用的资源即所述冲突资源。
另外，如果下行资源冲突，除了将所述第三指示信息告知通过所述冲突资源接收所述非紧急业务的用户设备外，所述基站还可以将下行紧急业务占用的非预留资源、未被占用的非预留资源等其他信息也告知所述接收非紧急业务的用户设备。
具体实现中，在接收到所述第三指示信息之后，通过所述冲突资源接收非紧急业务的用户设备可以请求所述基站重传所述非紧急业务，用以实现所述非紧急业务的正确接收。
本发明实施例中，如果所述预留资源能够支持传输的数据量大于所述控制信息的数据量，那么，基站可以将下行紧急业务的一部分数据信息也通过所述预留资源传输，另一部分数据信息通过所述非预留资源传输。可以理解的，此时，所述第二指示信息指示的资源可包括2部分，其中，一部分是所述数据信息占用的预留资源，另一部分是所述数据信息占用的非预留资源。
需要说明的，本发明实施例中使用的第一、第二、第三等表述方式仅用于区别说明本发明实施例涉及的各种指示信息，不用于限制顺序。
实施本发明实施例，通过基站从系统资源中预留出用于传输下行紧急业务 的预留资源，基站可以直接通过所述预留资源向UE发送所述下行紧急业务，提高了下行紧急业务的传输效率，可实现下行紧急业务的及时传输；并且，通过基站将所述预留资源的指示信息告知UE，使得UE只需要在所述预留资源上监测有无发给自己的下行紧急业务，而不需要在整个系统资源上进行搜索，降低了UE的设计复杂度。
下面结合图3A-3C详细说明本发明方法在LTE(4G)通信系统中的实施方式。
参见图3A，图3A示出了LTE系统中的下行时频资源的一种分配情况。
如图3A所示，在单个TTI内，前N(N在1-4之间)个OFDM符号用来传递PDCCH，其余OFDM符号用来传递PDSCH。图3A中的PDCCH占用3(即N＝3)个OFDM符号。这里，1个TTI即1个数据帧的传输时长。
图3A中的预留资源401是基站为下行紧急业务预留的时频资源。如图3A所示，在单个TTI内，预留资源401可以在时域上占用X个OFDM符号，在频域上占用Y个子载波。所述X个OFDM符号和频域上的Y个子载波相交形成的Z个资源因子RE；X，Y，Z均是正整数，其中Z＝X*Y。也即是说，预留资源401由Z个资源因子(RE)构成。优选的，预留资源401可占用PDSCH的全部OFDM符号，不占用PDCCH的OFDM符号，可实现及时发送不可预料的突发的下行紧急业务，同时也不影响非紧急业务的控制信息的传输。
本发明实施例中，在下行紧急业务的传输过程中，控制信息402和数据信息403可以如图3A所示占用相同的OFDM符号，可实现控制信息402和数据信息403的同步发送。
需要说明的，实际应用中，控制信息402和数据信息403也可以占用不同的SC-FDMA符号，即控制信息402和数据信息403之间存在时延。例如，在预留资源401中，控制信息402占用第i个SC-FDMA符号，数据信息403占用第i+1个SC-FDMA符号，可实现控制信息402和数据信息403均通过预留资源401发送，紧急业务的传输不会影响非紧急业务的传输，i为正整数。示例仅仅是本发明实施例的一种实现方式，实际应用中还可以不同，例如控制信息402与数据信息403之间存在2个SC-FDMA符号的时延，这里不作限制。
本发明实施例中，由于下行紧急业务需要传输时间短的特点，因此，下行紧急业务需要占用尽量少的SC-FDMA符号。
以图3A为例，控制信息402和数据信息403共占用1个SC-FDMA符号。在预留资源401内，如果该SC-FDMA符号上的RE不足够支持下行紧急业务的全部数据(控制信息402和数据信息403)的传输，则在预留资源401之外，UE可以通过该SC-FDMA符号上的非紧急业务占用的RE发送部分或全部数据信息403。也即是说，所述部分或全部数据信息403可能会与其他用户的下行非紧急业务使用相同的时频资源，导致资源冲突。
为了保证下行紧急业务的优先传输，基站可以在发生资源冲突的RE上只发送所述部分或全部数据信息403，而不发送所述其他用户的下行非紧急业务。
如果下行资源冲突，所述基站还可以向原来通过所述冲突资源接收非紧急业务的用户设备发送第三指示信息，用以告知该用户设备所述第三指示信息指示的资源被占用，被占用的资源上传输的数据不是该用户设备预期接收的非紧急业务，以使该用户设备忽略所述被占用资源上的数据。具体实现中，在接收到所述冲突资源的指示信息之后，原来通过所述冲突资源接收非紧急业务的用户设备可以请求所述基站重传所述非紧急业务，用以实现所述非紧急业务的正确接收。
可以理解的，为了使UE知道下行紧急业务的发送对象，所述下行紧急业务的控制信息还需要携带用户设备标识(UE ID)。可选的，用户设备标识可以隐藏在CRC中，例如，用与UE ID有关的量对CRC进行加扰，可避免其他接收非紧急业务的UE解析所述下行紧急业务的控制信息。
参见图3B，图3B示出了LTE系统中的下行时频资源的另一种分配情况。
如图3B所示，基站可以在一个符号中同时向两个UE，例如图3B中的UE3和UE4，发送下行紧急业务。实际应用中，基站还可以在一个符号中同时向两个以上UE发送下行紧急业务
本发明实施例中，在LTE系统的下行紧急业务的传输过程中，所述预留资源所占用的RE可以是静态配置的，即较长时间保持不变；所述预留资源所占用的RE也可以是基站动态的根据系统资源的调度情况重新从系统资源中选 取的。需要说明的，基站既可以周期性，例如每隔1个TTI或1个数据帧，的动态配置预留资源，也可以非周期性的动态配置预留资源。
为了实现预留资源可以做到按数据帧的传输周期改变，如图3C所示，基站可以在每个TTI中通过控制信道(PDCCH)向UE发送预留资源的指示信息404，即所述第一指示信息。并且，与非紧急业务的控制信息一样，预留资源的指示信息404也可以在频率和时间上分散发送以获得分集增益。
需要说明的，前述图3A-3C所示的分配时频资源的实施方式均可适用未来通信系统(如4.5G、5G)，所述未来通信系统在频率方向也有子载波的概念，在时间方向也有符号(类似OFDM符号、SC-FDMA符号)的概念。
在LTE系统中实施本发明提供的下行紧急业务的传输方法，通过从LTE系统的时频资源中预留出用于传输下行紧急业务的时频资源，当基站在当前TTI中接收到向UE传输下行紧急业务的指令后，基站可以直接通过该预留出的时频资源向UE发送所述下行紧急业务，提高了下行紧急业务的传输效率，可实现下行紧急业务的及时传输。
下面结合图4A-4C简要说明本发明方法在UMTS(3G)通信系统中的实施方式。UMTS通信系统是码分多址(Code Division Multiple Access，CDMA)的通信方式，其涉及的资源主要是扩频码。
参见图4A，图4A示出了UMTS通信系统中的扩频码树，其中，扩频码表示为：Cch，SF，k，SF是扩频因子(Spreading Factor，SF)，k是码道号。
在UMTS通信系统中，上行码资源非常丰富，一个UE对应一个扩频码树。但是，下行码资源十分有限，一个小区才对应一个扩频码树。为了保证下行紧急业务的及时传输，基站可以从系统提供的下行扩频码中预留出可用的(没有被占用)用于传输所述下行紧急业务的扩频码，所述预留出的扩频码不会被非紧急业务占用。这里，所述预留出的扩频码即是所述预留资源。例如，基站可以从图4A所示的下行扩频码树中选取Cch，4，0的扩频码作为用于传输下行紧急业务的扩频码。
在一种可能的实现方式中，基站可以从高速物理下行共享信道(High Speed Physical Downlink Shared Channel，HS-PDSCH)中预留出用于传输下 行紧急业务的扩频码。高速物理下行共享信道HS-PDSCH的扩频因子为16，也即是说，每个小区最多可分配15个HS-PDSCH信道。那么，基站可以从所述15个HS-PDSCH信道中预留出用于传输下行紧急业务的HS-PDSCH扩频码。例如，基站从HS-PDSCH下行扩频码树中预留出用于传输下行紧急业务的扩频码：Cch，16，3，即将HS-PDSCH的第4条码道预留给下行紧急业务。示例仅仅是本发明的一种实现方式，实际应用中还可以不同，不应构成限定。
在另一种可能的实现方式中，基站可以从专用物理信道(Dedicated Physical Channel，DPCH)中预留出用于传输下行紧急业务的扩频码。DPCH的SF在4到512之间，基站发向不同UE的DPCH有不同的扩频因子(由业务速率决定)和扩频码。那么基站可以从各个UE对应的DPCH中预留出用于传输各个UE对应的下行紧急业务的扩频码。例如，UE1的DPCH的SF＝256，为UE1预留的用于传输下行紧急业务的扩频码是：Cch，256，127，即将UE1的DPCH的第128条码道预留给UE1对应的下行紧急业务。又例如，UE2的DPCH的SF＝32，为UE1预留的用于传输下行紧急业务的扩频码是：Cch，32，15，即将UE2的DPCH的第15条码道预留给UE2对应的下行紧急业务。示例仅仅是本发明的一种实现方式，实际应用中还可以不同，不应构成限定。
需要说明的，除了前述HS-PDSCH、DPCH，基站还可以为下行紧急业务预留出其他类型的下行扩频码，例如共享控制信道(Shared Control Channel for HS-DSCH，HS-SCCH)对应的扩频码，这里不作限制。
需要说明的，基站可以预留出1个或至少2个用于传输下行紧急业务的扩频码。
本发明实施例中，预留出的用于传输下行紧急业务的扩频码对应的码道的数据传输速率不宜过大，能够支撑下行紧急业务的传输即可，避免浪费系统资源。但是，为了保证下行紧急业务的正确高效的传输，预留的所述扩频码对应的码道需要至少能够支持下行紧急业务的控制信息的传输。具体的，基站可以在当前TTI通过所述预留的扩频码向UE发送下行紧急业务。
例如，基站可以在图4B所示的HS-PDSCH数据帧的时隙1通过所述预留出的扩频码(属于HS-PDSCH对应的扩频码)传输下行紧急业务。又例如，基站可以在图4C所示的DPCH数据帧的时隙i(i是正整数)通过所述预留出的扩频 码(属于DPCH对应的扩频码)传输下行紧急业务。示例仅仅是本发明实施例的一种实现方式，实际应用中还可以不同，不应构成限定。
本发明实施例中，基站可以通过所述预留出的扩频码之外的下行扩频码传输下行紧急业务的部分或全部数据信息，所述部分或全部数据信息可能会与其他用户的下行非紧急业务使用相同的扩频码，导致资源冲突。为了保证下行紧急业务的优先传输，基站可以在发生资源冲突的扩频码上只发送所述部分或全部数据信息，而不发送所述其他用户的下行非紧急业务。
在一种可能的实现方式中，如果基站通过所述预留出的扩频码能够传输的数据量大于所述下行紧急业务的控制信息的数据量，则基站还可以通过所述预留出的扩频码向所述UE发送所述下行紧急业务的部分或全部数据信息。
例如，假设基站在图4B所示的HS-PDSCH数据帧的时隙1(Slot1)能够传输的数据量是320比特，如果下行紧急业务的控制信息是64比特(小于320比特)，则基站还能够在所述时隙1通过所述预留出的扩频码传输下行紧急业务的部分或全部数据信息。又例如，假设基站在图4C所示的DPCH数据帧的时隙i(i是正整数)能够传输的数据量是80比特，如果下行紧急业务的控制信息是64比特(小于80比特)，则基站还能够在所述时隙i通过所述预留出的扩频码传输下行紧急业务的部分或全部数据信息。示例仅仅是本发明实施例的一种实现方式，实际应用中还可以不同，不应构成限定。
可以理解的，为了使UE知道下行紧急业务的发送对象，下行紧急业务的控制信息还需要携带用户设备标识(UE ID)。
在UMTS系统中实施本发明提供的下行紧急业务的传输方法，通过从UMTS系统的下行扩频码资源中预留出用于传输下行紧急业务的扩频码，当基站在当前TTI中接收到向UE传输下行紧急业务的指令后，基站可以直接通过该预留出的扩频码向UE发送所述下行紧急业务，可实现下行紧急业务的及时传输。
下面结合图5简要说明本发明方法在GSM(2G)通信系统中的实施方式。GSM通信系统是时分多址(Time Division Multiple Access，TDMA)的通信方式，其涉及的资源主要是时隙。
参见图5，如图5所示的GSM数据帧，一个数据帧包括8个时隙，即8个物理信道。其中，一个时隙的时间长度为0.577ms。多个帧可以组成复帧，例如，26复帧由26个TDMA复帧组成，时间间隔为120ms。
为了保证下行紧急业务的及时传输，基站可以从数据帧包括的多个时隙中预留出的用于传输下行紧急业务的时隙(如图5中的时隙3)。这里，所述预留出的时隙即是所述预留资源。
需要说明的，基站可以预留出1个或至少2个用于传输下行紧急业务的时隙。
本发明实施例中，预留出的用于传输下行紧急业务的时隙不宜过多，能够支撑下行紧急业务的传输即可，避免浪费系统资源。但是，为了保证下行紧急业务的正确高效的传输，预留的所述时隙需要至少能够支持下行紧急业务的控制信息的传输。
本发明实施例中，基站可以通过所述预留出的时隙之外的时隙传输下行紧急业务的部分或全部数据信息，所述部分或全部数据信息可能会与其他用户的下行非紧急业务使用相同的时隙，导致资源冲突。为了保证下行紧急业务的优先传输，基站可以在发生资源冲突的时隙上只发送所述部分或全部数据信息，而不发送所述其他用户的下行非紧急业务。
在一种可能的实现方式中，如果基站通过所述预留出的时隙能够传输的数据量大于下行紧急业务的控制信息的数据量，则基站还可以通过所述预留出的时隙向UE发送所述下行紧急业务的部分或全部数据信息。
例如，基站在图5所示的GSM数据帧的时隙3能够传输的数据量是156.25比特，如果下行紧急业务的控制信息是64比特(小于156.25比特)，则基站还能够通过所述时隙3传输下行紧急业务的部分或全部数据信息。示例仅仅是本发明实施例的一种实现方式，实际应用中还可以不同，不应构成限定。
可以理解的，为了使UE知道下行紧急业务的发送对象是哪一个UE，下行紧急业务的控制信息还需要携带用户设备标识(UE ID)。
在GSM系统中实施本发明提供的下行紧急业务的传输方法，通过预留出用于传输下行紧急业务的时隙资源，当基站在当前TTI中接收到向UE传输下行紧急业务的指令后，基站可以直接通过该预留出的时隙向UE发送所述下行紧 急业务，可实现下行紧急业务的及时传输。
参见图6，图6是本发明实施例提供的一种基站的结构示意图。如图6所示，基站60可包括：预留单元601和发送单元603，其中：
预留单元601，用于从系统资源中预留出的用于传输下行紧急业务的预留资源；
发送单元603，用于向用户设备发送第一指示信息，用以指示所述用户设备通过第一指示信息指示的资源接收下行紧急业务；所述第一指示信息用于指示所述预留资源；
发送单元603，还用于通过所述预留资源向所述用户设备发送下行紧急业务。
本发明实施例中，下行紧急业务可以包括：控制信息和数据信息。下行紧急业务的控制信息既可以包括指示调制编码方式、HARQ重传的冗余版本等信息，也可以包含数据信息占用的资源的指示信息，即所述第二指示信息。
本发明实施例中，所述预留资源不宜过多，能够支撑下行紧急业务的传输即可，避免浪费系统资源。但是，为了保证下行紧急业务的正确高效的传输，所述预留资源需要至少能够支持下行紧急业务的控制信息的传输。
具体实现中，在下行紧急业务传输时，发送单元603可具体用于：通过所述预留资源向所述用户设备发送所述下行紧急业务的控制信息，所述控制信息包括第二指示信息，用以指示所述用户设备通过所述第二指示信息指示的资源接收所述下行紧急业务的数据信息。这里，所述第二指示信息可用于指示所述数据信息占用的资源。
本发明实施例中，下行紧急业务的数据信息占用的资源可包括：非预留资源，所述非预留资源是所述预留资源之外的系统资源。具体实现中，如果所述数据信息占用的非预留资源与调度给下行非紧急业务的资源发生冲突。发送单元603可具体用于通过发生冲突的非预留资源仅发送所述数据信息，而不发送下行非紧急业务。
实际应用中，如果下行资源冲突，发送单元603还可用于向接收所述非紧急业务的用户设备发送第三指示信息，用以告知接收所述非紧急业务的用户设 备所述第三指示信息指示的资源被占用，被占用的资源上传输的数据不是该用户设备预期接收的非紧急业务，以使该用户设备忽略所述被占用资源上的数据。这里，所述第三指示信息用于指示被占用的所述非预留资源。
本发明实施例中，如果所述预留资源能够支持传输的数据量大于紧急业务的控制信息的数据量，那么，除了紧急业务的控制信息外，发送单元603还可具体用于通过所述预留资源传输下行紧急业务的部分或全部数据信息。
本发明实施例中，所述预留资源可以是预留单元601静态配置的资源；或者，所述预留资源可以是预留单元601动态配置的资源。本发明实施例涉及的预留资源可以是LTE系统中的时频资源(如RB或RE)，也可以是UMTS系统中的扩频码，还可以是GSM系统中的时隙资源。具体可以参考方法实施例部分中的详细内容，这里不再赘述。实际应用中，所述预留资源还可以是其他形式的空中接口资源，这里不作限制。
需要说明的，基站60包括的各个功能单元的实现方式可参考前述方法实施例的内容以及前述方法在现有的各个通信系统中的实施细节，这里不再赘述。
另外，本发明实施例提供的一种用户设备，所述用户设备可包括：接收单元，其中：
所述接收单元，用于接收基站发送的第一指示信息；所述第一指示信息用于指示预留资源；所述预留资源是所述基站从系统资源中预留出的用于传输下行紧急业务的预留资源；
所述接收单元，还用于根据所述第一指示信息，通过所述第一指示信息指示的资源接收所述基站发送的下行紧急业务。
本发明实施例中，下行紧急业务可以包括：控制信息和数据信息。下行紧急业务的控制信息既可以包括指示调制编码方式、HARQ重传的冗余版本等信息，也可以包含数据信息占用的资源的指示信息，即所述第二指示信息。
本发明实施例中，所述预留资源不宜过多，能够支撑下行紧急业务的传输即可，避免浪费系统资源。但是，为了保证下行紧急业务的正确高效的传输，所述预留资源需要至少能够支持下行紧急业务的控制信息的传输。
具体的，在下行紧急业务传输时，所述基站可通过所述预留资源向所述用 户设备发送下行紧急业务的控制信息。相应的，所述接收单元可用于：根据所述第一指示信息，通过所述第一指示信息指示的资源接收所述下行紧急业务的控制信息。由于所述控制信息包括第二指示信息，所述接收单元还可用于根据所述第二指示信息，通过所述所述第二指示信息指示的资源接收所述数据信息。这里，所述第二指示信息可用于指示所述下行紧急业务的数据信息占用的资源。
本发明实施例中，如果所述基站通过所述预留资源能够传输的数据量大于所述控制信息的数据量，所述基站通过所述预留资源还传输了所述下行紧急业务的部分或全部数据信息。那么，相应的，所述接收单元还可具体用于通过所述预留资源接收所述下行紧急业务的部分或全部数据信息。
本发明实施例中，所述预留资源可以是所述基站静态配置的资源；或者，所述预留资源可以是所述基站动态配置的资源。本发明实施例涉及的预留资源可以是LTE系统中的时频资源(如RB或RE)，也可以是UMTS系统中的扩频码，还可以是GSM系统中的时隙资源。具体可以参考方法实施例部分中的详细内容，这里不再赘述。实际应用中，所述预留资源还可以是其他形式的空中接口资源，这里不作限制。
需要说明的，所述接收单元的具体实现方式可参考前述方法实施例的内容以及前述方法在现有的各个通信系统中的实施细节，这里不再赘述。
为了便于实施本发明实施例，本发明提供了一种基站和用户设备，用于本发明实施例提供的下行紧急业务传输方法。
参见图7，基站1100可包括：网络接口1102、基站处理器1104、发射器1106、接收器1108、耦合器1110、天线1112和存储器1114。在本发明的一些实施例中，这些部件可通过总线或者其它方式连接，其中，图7中以通过总线连接为例。
其中，网络接口1102用于基站1100与用户设备(2G中的移动台MS、3G和4G中的UE)进行数据通信。具体实现中，网络接口1102可包括：GSM(2G)无线网络接口、WCDMA(3G)无线网络接口以及LTE(4G)无线网络接口等等中的一种或几种，也可以是未来4.5G或5G的无线网络接口。
天线1112用于将传输线中的电磁能转换成自由空间中的电磁波，或者将自 由空间中的电磁波转换成传输线中的电磁能；耦合器1110用于将移动通信号分成多路，分配给多个的接收器1108。
发射器1106用于对基站处理器1104生成的移动通信信号进行发射处理(例如调制)，接收器1108用于对天线1112接收的移动通信信号进行接收处理(例如解调)，二者可看作一个无线调制解调器。具体实现中，发射器1106或接收器1108的数量可以是一个或多个。
存储器1114用于存储程序代码，具体实现中，存储器1114可以采用只读存储器(Read Only Memory，ROM)，可用于存储程序代码。
基站处理器1104，用于进行无线信道管理、实施呼叫和通信链路的建立和拆除，并为本控制区内用户设备的过区切换进行控制等。具体实现中，基站处理器1104可包括：AM/CM模块(用于话路交换和信息交换的中心)、BM模块(用于完成呼叫处理、信令处理、无线资源管理、无线链路的管理和电路维护功能)、TCSM模块(用于完成复用解复用及码变换功能)等模块。具体信息可参考移动通讯相关知识。本发明实施例中，基站处理器1104还用于调用存储于存储器1114中程序代码执行如下步骤：
从系统资源中预留出的用于传输下行紧急业务的预留资源；
利用发射器1106向用户设备发送第一指示信息，用以指示所述用户设备通过第一指示信息指示的资源接收下行紧急业务；所述第一指示信息用于指示所述预留资源；
利用发射器1106通过所述预留资源向所述用户设备发送下行紧急业务。
本发明实施例中，下行紧急业务可以包括：控制信息和数据信息。下行紧急业务的控制信息既可以包括指示调制编码方式、HARQ重传的冗余版本等信息，也可以包含数据信息占用的资源的指示信息，即所述第二指示信息。
本发明实施例中，所述预留资源不宜过多，能够支撑下行紧急业务的传输即可，避免浪费系统资源。但是，为了保证下行紧急业务的正确高效的传输，所述预留资源需要至少能够支持下行紧急业务的控制信息的传输。具体的，基站处理器1104可以利用发射器1106通过所述预设资源向所述用户设备发送下行紧急业务的控制信息。所述控制信息包括第二指示信息，用以指示所述用户设备通过所述第二指示信息指示的资源接收所述下行紧急业务的数据信息。这 里，所述第二指示信息可用于指示所述数据信息占用的资源。
本发明实施例中，下行紧急业务的数据信息占用的资源可包括：非预留资源，所述非预留资源是所述预留资源之外的系统资源。具体实现中，如果所述数据信息占用的非预留资源与调度给下行非紧急业务的资源发生冲突。基站处理器1104可以利用发射器1106通过发生冲突的非预留资源仅发送所述数据信息，而不发送下行非紧急业务。
实际应用中，如果下行资源冲突，基站处理器1104可以利用发射器1106向接收所述非紧急业务的用户设备发送第三指示信息，用以告知接收所述非紧急业务的用户设备所述第三指示信息指示的资源被占用，被占用的资源上传输的数据不是该用户设备预期接收的非紧急业务，以使该用户设备忽略所述被占用资源上的数据。这里，所述第三指示信息用于指示发生冲突的所述非预留资源。
本发明实施例中，如果所述预留资源能够支持传输的数据量大于紧急业务的控制信息的数据量，那么，除了紧急业务的控制信息外，基站处理器1104还可以利用发射器1106通过所述预留资源传输下行紧急业务的部分或全部数据信息。
本发明实施例中，所述预留资源可以是基站处理器1104静态配置的资源；或者，所述预留资源可以是基站处理器1104动态配置的资源。本发明实施例涉及的预留资源可以是LTE系统中的时频资源(如RB或RE)，也可以是UMTS系统中的扩频码，还可以是GSM系统中的时隙资源。具体可以参考方法实施例部分中的详细内容，这里不再赘述。实际应用中，所述预留资源还可以是其他形式的空中接口资源，这里不作限制。
需要说明的，基站60可以适用2G通信系统(如GSM)、3G通信系统(如UMTS)以及4G通信系统(LTE)，也可以是未来的4.5G或5G通信系统。
可理解的，基站处理器1104在前述3种通信系统中的具体执行步骤可参考前述方法实施例部分的内容以及前述方法实施例在前述3种通信系统中的具体实施方式，此处不再赘述。
参见图8，用户设备1200可包括：输入输出模块(包括音频输入输出模块 1218、按键输入模块1216以及显示器1220等)、用户接口1202、移动处理器1204、发射器1206、接收器1208、耦合器1210、天线1214以及存储器1212。在本发明的一些实施例中，这些部件可通过总线或者其它方式连接，其中，图8中以通过总线连接为例。
其中：
天线1214用于将传输线中的电磁能转换成自由空间中的电磁波，或者将自由空间中的电磁波转换成传输线中的电磁能；耦合器1210用于将移动通信号分成多路，分配给多个的接收器1208。
发射器1206用于对移动处理器1204生成的移动通信信号进行发射处理(例如调制)，接收器1208用于对天线1214接收的移动通信信号进行接收处理(例如解调)，二者可看作一个无线调制解调器。具体实现中，发射器1206或接收器1208的数量可以是一个或多个。
所述输入输出模块主要用于实现用户设备1200和用户/外部环境之间的交互功能，主要包括音频输入输出模块1218、按键输入模块1216以及显示器1220等。具体实现中，所述输入输出模块还可包括：摄像头、触摸屏以及传感器等等。其中，所述输入输出模块均通过用户接口1202与移动处理器1204进行通信。
存储器1212与移动处理器1204耦合，用于存储各种软件程序和/或多组指令。具体实现中，存储器1212可包括高速随机存取的存储器，并且也可包括非易失性存储器，例如一个或多个磁盘存储设备、闪存设备或其他非易失性固态存储设备。移动处理器1204主要用于调用存储于存储器1212中的程序，并执行如下步骤：
利用接收器1208接收基站发送的第一指示信息；所述第一指示信息用于指示预留资源；所述预留资源是所述基站从系统资源中预留出的用于传输下行紧急业务的预留资源；
根据所述第一指示信息，利用接收器1208通过所述第一指示信息指示的资源接收所述基站发送的下行紧急业务。
本发明实施例中，下行紧急业务可以包括：控制信息和数据信息。下行紧急业务的控制信息既可以包括指示调制编码方式、HARQ重传的冗余版本等信息，也可以包含数据信息占用的资源的指示信息，即所述第二指示信息。
本发明实施例中，所述预留资源不宜过多，能够支撑下行紧急业务的传输即可，避免浪费系统资源。但是，为了保证下行紧急业务的正确高效的传输，所述预留资源需要至少能够支持下行紧急业务的控制信息的传输。
具体的，所述基站可以通过所述预留资源向用户设备1200发送下行紧急业务的控制信息。相应的，移动处理器1204可利用接收器1208通过所述预留资源接收所述下行紧急业务的控制信息。由于所述控制信息包括第二指示信息，移动处理器1204还可利用接收器1208通过所述所述第二指示信息指示的资源接收所述数据信息。这里，所述第二指示信息可用于指示所述下行紧急业务的数据信息占用的资源。
本发明实施例中，如果所述基站通过所述预留资源能够传输的数据量大于所述控制信息的数据量，所述基站通过所述预留资源还传输了所述下行紧急业务的部分或全部数据信息。那么，相应的，移动处理器1204还可利用接收器1208通过所述预留资源接收所述下行紧急业务的部分或全部数据信息。
本发明实施例中，所述预留资源可以是所述基站静态配置的资源；或者，所述预留资源可以是所述基站动态配置的资源。本发明实施例涉及的预留资源可以是LTE系统中的时频资源(如RB或RE)，也可以是UMTS系统中的扩频码，还可以是GSM系统中的时隙资源。具体可以参考方法实施例部分中的详细内容，这里不再赘述。实际应用中，所述预留资源还可以是其他形式的空中接口资源，这里不作限制。
需要说明的，用户设备1200可以是2G通信系统(如GSM)中的移动台，也可以是3G通信系统(如UMTS)和4G通信系统(LTE)中的UE，还可以是未来的4.5G或5G通信系统中的用户终端。
可理解的，移动处理器1204的的具体执行步骤可参考前述方法实施例部分的内容以及前述方法实施例在前述3种通信系统中的具体实施方式，此处不再赘述。
另外，本发明实施例还提供了一种通信系统(如图1所示)，所述通信系统包括：基站和用户设备。在一种实现方式中，所述基站还可以是图7描述的基站1100，所述用户设备还可以是图8描述的用户设备1200。
需要说明的，所述基站可以上述全部内容所涉及的基站，所述用户设备可 以是上述全部内容所涉及的用户设备，这里不再赘述。
综上所述，实施本发明实施例，通过基站从系统资源中预留出用于传输下行紧急业务的预留资源，基站可以直接通过所述预留资源向用户设备发送所述下行紧急业务，提高了下行紧急业务的传输效率，可实现下行紧急业务的及时传输；并且，通过基站将所述预留资源的指示信息告知用户设备，使得用户设备只需要在所述预留资源上监测有无发给自己的下行紧急业务，而不需要在整个系统资源上进行搜索，降低了用户设备的设计复杂度。
本领域普通技术人员可以理解实现上述实施例方法中的部分或全部流程，是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。

Claims (25)

  1. 一种下行紧急业务传输方法，其特征在于，包括：
    基站从系统资源中预留出用于传输下行紧急业务的预留资源；
    所述基站向用户设备发送第一指示信息，用以指示所述用户设备通过所述第一指示信息指示的资源接收下行紧急业务，其中，所述第一指示信息用于指示所述预留资源；
    所述基站通过所述预留资源向所述用户设备发送所述下行紧急业务。
  2. 如权利要求1所述的方法，其特征在于，所述基站通过所述预留资源向所述用户设备发送下行紧急业务，包括：所述基站通过所述预留资源向所述用户设备发送所述下行紧急业务的控制信息，所述控制信息包括第二指示信息，用以指示所述用户设备通过所述第二指示信息指示的资源接收所述下行紧急业务的数据信息，其中，所述第二指示信息用于指示所述数据信息占用的资源。
  3. 如权利要求2所述的方法，其特征在于，所述数据信息占用的资源包括：非预留资源，所述非预留资源是所述预留资源之外的系统资源；
    当所述数据信息占用的非预留资源与调度给非紧急业务的资源发生冲突时，所述方法还包括：所述基站通过发生冲突的非预留资源仅发送所述数据信息。
  4. 如权利要求3所述的方法，其特征在于，当所述数据信息占用的非预留资源与调度给非紧急业务的资源发生冲突时，所述方法还包括：所述基站向接收所述非紧急业务的用户设备发送第三指示信息，用以告知接收所述非紧急业务的用户设备所述第三指示信息指示的资源被占用；所述第三指示信息用于指示被占用的所述非预留资源。
  5. 如权利要求1-4中任一项所述的方法，其特征在于，所述基站与所述用户设备处于长期演进LTE通信系统中；在单个传输间隔内，所述预留资源是时 域上的M个符号和频域上的N个子载波相交形成的K个资源因子RE；M，N，K均是正整数，其中K＝M*N。
  6. 如权利要求1-4中任一项所述的方法，其特征在于，所述基站与所述用户设备处于统一移动通信系统UMTS中；在单个传输间隔内，所述预留资源是所述基站从所述统一移动通信系统的下行扩频码中预留出的可用的用于传输所述下行紧急业务的扩频码。
  7. 如权利要求1-4中任一项所述的方法，其特征在于，所述基站与所述用户设备处于全球移动通信系统GSM中；在单个传输间隔内，所述预留资源是所述基站从所述单个传输间隔传输的数据帧包括的多个时隙中预留出的用于传输所述下行紧急业务的时隙。
  8. 一种下行紧急业务传输方法，其特征在于，包括：
    用户设备接收基站发送的第一指示信息；所述第一指示信息用于指示预留资源；所述预留资源是所述基站从系统资源中预留出的用于传输下行紧急业务的预留资源；
    所述用户设备根据所述第一指示信息，通过所述第一指示信息指示的资源接收所述基站发送的下行紧急业务。
  9. 如权利要求8所述的方法，其特征在于，所述用户设备根据所述第一指示信息，通过所述第一指示信息指示的资源接收所述基站发送的下行紧急业务，包括：
    所述用户设备根据所述第一指示信息，通过所述第一指示信息指示的资源接收所述下行紧急业务的控制信息；所述控制信息包括第二指示信息；所述第二指示信息用于指示所述下行紧急业务的数据信息占用的资源；
    所述用户设备根据所述第二指示信息，通过所述所述第二指示信息指示的资源接收所述数据信息。
  10. 如权利要求8-9中任一项所述的方法，其特征在于，所述基站与所述用户设备处于长期演进LTE通信系统中；在单个传输间隔内，所述预留资源是时域上的M个符号和频域上的N个子载波相交形成的K个资源因子RE；M，N，K均是正整数，其中K＝M*N。
  11. 如权利要求8-9中任一项所述的方法，其特征在于，所述基站与所述用户设备处于统一移动通信系统UMTS；在单个传输间隔内，所述预留资源是所述基站从所述统一移动通信系统的下行扩频码中预留出的可用的用于传输所述下行紧急业务的扩频码。
  12. 如权利要求8-9中任一项所述的方法，其特征在于，所述基站与所述用户设备处于全球移动通信系统GSM中；在单个传输间隔内，所述预留资源是所述基站从所述单个传输间隔传输的数据帧包括的多个时隙中预留出的用于传输所述下行紧急业务的时隙。
  13. 一种基站，其特征在于，包括：存储器以及与所述存储器耦合的处理器、发射器，其中：所述处理器读取所述存储器中存储的指令，用于执行以下步骤：
    所述处理器从系统资源中预留出的用于传输下行紧急业务的预留资源；
    所述处理器利用所述发射器向用户设备发送第一指示信息，用以指示所述用户设备通过所述第一指示信息指示的资源接收下行紧急业务，其中，所述第一指示信息用于指示所述预留资源；
    所述发射器通过所述预留资源向所述用户设备发送所述下行紧急业务。
  14. 如权利要求13所述的基站，其特征在于，所述处理器利用所述发射器通过所述预留资源向所述用户设备发送下行紧急业务，包括：所述处理器利用所述发射器通过所述预留资源向所述用户设备发送所述下行紧急业务的控制信息，所述控制信息包括第二指示信息，用以指示所述用户设备通过所述第二指示信息指示的资源接收所述下行紧急业务的数据信息，其中，所述第二指示 信息用于指示所述数据信息占用的资源。
  15. 如权利要求14所述的基站，其特征在于，所述数据信息占用的资源包括：非预留资源，所述非预留资源是所述预留资源之外的系统资源；
    当所述数据信息占用的非预留资源与调度给非紧急业务的资源发生冲突时，所述处理器还利用所述发射器通过发生冲突的非预留资源仅发送所述数据信息。
  16. 如权利要求15所述的基站，其特征在于，当所述数据信息占用的非预留资源与调度给非紧急业务的资源发生冲突时，所述处理器还利用所述发射器向接收所述非紧急业务的用户设备发送第三指示信息，用以告知接收所述非紧急业务的用户设备所述第三指示信息指示的资源被占用；所述第三指示信息用于指示被占用的所述非预留资源。
  17. 如权利要求13-16中任一项所述的基站，其特征在于，所述基站与所述用户设备处于长期演进LTE通信系统中；在单个传输间隔内，所述预留资源是时域上的M个符号和频域上的N个子载波相交形成的K个资源因子RE；M，N，K均是正整数，其中K＝M*N。
  18. 如权利要求13-16中任一项所述的基站，其特征在于，所述基站与所述用户设备处于统一移动通信系统UMTS中；在单个传输间隔内，所述预留资源是所述基站从所述统一移动通信系统的下行扩频码中预留出的可用的用于传输所述下行紧急业务的扩频码。
  19. 如权利要求13-16中任一项所述的基站，其特征在于，所述基站与所述用户设备处于全球移动通信系统GSM中；在单个传输间隔内，所述预留资源是所述基站从所述单个传输间隔传输的数据帧包括的多个时隙中预留出的用于传输所述下行紧急业务的时隙。
  20. 一种用户设备，其特征在于，包括：存储器以及与所述存储器耦合的处理器、接收器，其中：所述处理器读取所述存储器中存储的指令，用于执行以下步骤：
    所述处理器利用所述接收器接收基站发送的第一指示信息；所述第一指示信息用于指示预留资源；所述预留资源是所述基站从系统资源中预留出的用于传输下行紧急业务的预留资源；
    所述处理器根据所述第一指示信息，利用所述接收器通过所述第一指示信息指示的资源接收所述基站发送的下行紧急业务。
  21. 如权利要求20所述的用户设备，其特征在于，所述处理器根据所述第一指示信息，通过所述第一指示信息指示的资源利用所述接收器接收所述基站发送的下行紧急业务，包括：
    所述处理器根据所述第一指示信息，利用所述接收器通过所述第一指示信息指示的资源接收所述下行紧急业务的控制信息；所述控制信息包括第二指示信息；所述第二指示信息用于指示所述下行紧急业务的数据信息占用的资源；
    所述处理器根据所述第二指示信息，利用所述接收器通过所述所述第二指示信息指示的资源接收所述数据信息。
  22. 如权利要求20-21中任一项所述的用户设备，其特征在于，所述基站与所述用户设备处于长期演进LTE通信系统中；在单个传输间隔内，所述预留资源是时域上的M个符号和频域上的N个子载波相交形成的K个资源因子RE；M，N，K均是正整数，其中K＝M*N。
  23. 如权利要求20-21中任一项所述的用户设备，其特征在于，所述基站与所述用户设备处于统一移动通信系统UMTS；在单个传输间隔内，所述预留资源是所述基站从所述统一移动通信系统的下行扩频码中预留出的可用的用于传输所述下行紧急业务的扩频码。
  24. 如权利要求20-21中任一项所述的用户设备，其特征在于，所述基站 与所述用户设备处于全球移动通信系统GSM中；在单个传输间隔内，所述预留资源是所述基站从所述单个传输间隔传输的数据帧包括的多个时隙中预留出的用于传输所述下行紧急业务的时隙。
  25. 一种通信系统，其特征在于，包括：基站、用户设备，其中：
    所述基站是权利要求13-19中任一项所述的基站；所述用户设备是权利要求20-24中任一项所述的用户设备。
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