WO2017004774A1 - 一种数据传输的方法、无线网络设备和通信系统 - Google Patents

一种数据传输的方法、无线网络设备和通信系统 Download PDF

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Publication number
WO2017004774A1
WO2017004774A1 PCT/CN2015/083388 CN2015083388W WO2017004774A1 WO 2017004774 A1 WO2017004774 A1 WO 2017004774A1 CN 2015083388 W CN2015083388 W CN 2015083388W WO 2017004774 A1 WO2017004774 A1 WO 2017004774A1
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WO
WIPO (PCT)
Prior art keywords
service
length
channel
common information
same
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PCT/CN2015/083388
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English (en)
French (fr)
Inventor
李元杰
王婷
薛丽霞
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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
Priority to BR112018000202-0A priority Critical patent/BR112018000202B1/pt
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN202010189670.8A priority patent/CN111698779A/zh
Priority to MYPI2017705133A priority patent/MY197768A/en
Priority to PCT/CN2015/083388 priority patent/WO2017004774A1/zh
Priority to CN201910172046.4A priority patent/CN110176980B/zh
Priority to CN201580081516.6A priority patent/CN107836129B/zh
Priority to EP15897430.3A priority patent/EP3306996B1/en
Priority to KR1020187002454A priority patent/KR20180021849A/ko
Priority to JP2018500527A priority patent/JP6737868B2/ja
Priority to KR1020207023100A priority patent/KR102282754B1/ko
Publication of WO2017004774A1 publication Critical patent/WO2017004774A1/zh
Priority to US15/863,476 priority patent/US10764886B2/en
Priority to US16/225,908 priority patent/US10652882B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • 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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method, a wireless network device, and a communication system.
  • VoIP voice over IP
  • IP Internet Protocol
  • MTC machine type communication
  • eMBMS enhanced multimedia broad cost/multicast service
  • D2D device to device
  • the current common solution is to transmit various services on different carriers or in different subframes of the same carrier, and the utilization rate of the carrier is low. There is a need for a service transmission scheme that improves carrier utilization and a corresponding public information transmission scheme.
  • the embodiment of the invention provides a frame structure for wireless communication, a method, a device and a communication system for data transmission, which are applicable to a scenario of service transmission with high carrier utilization.
  • the scenario of service transmission with high carrier utilization may include transmitting different services on different sub-bands of the same carrier.
  • an embodiment of the present invention provides a frame structure for wireless communication, including:
  • the at least two common information channels including a first common information channel and a second common information channel, where the first common information channel and the second common information channel are located On the same sub-band of the same carrier.
  • the common information includes at least one of a synchronization signal, a broadcast signal, and a system message.
  • the first common information channel has a first subcarrier spacing and a first cyclic prefix length
  • the second common information channel has a second subcarrier spacing and a second cyclic prefix length, the first subcarrier spacing and the second subcarrier spacing are different, and the first cyclic prefix length and the second cyclic prefix length are different .
  • the first common information channel has a first subcarrier spacing and a first cyclic prefix length
  • the second common information channel has a second subcarrier spacing and a second cyclic prefix length, the first subcarrier spacing and the second subcarrier spacing being the same and the first cyclic prefix length and the second cyclic prefix Different lengths.
  • the first common information channel and the The second common information channel is on an intermediate resource block on the different sub-bands.
  • the same carrier includes at least two The traffic channel, the at least two traffic channels include a first traffic channel and a second traffic channel, the first service has a first service characteristic, the second service has a second service characteristic, and the first service feature includes a a frame structure of a service or a first service type, where the second service feature includes a frame structure of the second service or a second service type;
  • the first traffic channel corresponds to the first common information channel
  • the second traffic channel corresponds to the second common information channel
  • the frame structure of the first service includes a first service subcarrier interval, a first service cycle prefix length, and The sub-band where the first service is located;
  • the first traffic channel corresponding to the first public information channel includes:
  • the first service subcarrier spacing is the same as the first subcarrier spacing, and the first service CP length is the same as the first CP length; or the first service subcarrier spacing and location The first subcarrier spacing is the same, and the first service CP length is different from the first CP length; and,
  • the sub-band in which the first service is located is the same as the sub-band in which the first common information channel is located.
  • the frame structure of the second service includes the second service subcarrier interval and the second service cyclic prefix The length and the sub-band where the second service is located;
  • the second traffic channel corresponding to the second public information channel includes:
  • the second service subcarrier spacing and the second subcarrier spacing are the same, and the second service CP length and the second CP length are the same; or the second service subcarrier spacing and location The second subcarrier spacing is the same, and the second service CP length is different from the second CP length; and,
  • the sub-band in which the second service is located is the same as the sub-band in which the second common information channel is located.
  • the at least two traffic channels further include a third traffic channel
  • the third service has a third service characteristic
  • the third service feature includes a third service frame structure or a third service type
  • the second common information channel also corresponds to the third service feature.
  • the frame structure of the third service includes a third service subcarrier interval, a third service cyclic prefix length, and a subband where the third service is located; the subband where the third service is located and the second common information channel Different sub-bands;
  • the second common information channel also corresponding to the third traffic channel includes:
  • the third service subcarrier interval and the second subcarrier interval are the same, and the third service CP length and the second CP length are the same; or the third service subcarrier interval and the second The subcarrier spacing is the same, and the third service CP length is different from the second CP length.
  • the embodiment of the present invention provides a data transmission method, where the wireless network device is according to the first aspect, or the foregoing any one of the first to the ninth possible implementation manners of the first aspect.
  • the frame structure carries out the transmission and/or reception of data, which includes public information and/or services.
  • an embodiment of the present invention provides a wireless network device, including a transceiver unit and a processing unit, where the processing unit performs the method provided by the second aspect, and performs data by using the transceiver unit in the process of executing Send and / or receive.
  • the wireless network device is a base station, or a terminal.
  • an embodiment of the present invention provides a data transmission method, including:
  • the first wireless network device transmits at least two common information channels in the same carrier, the at least two common information channels including a first common information channel and a second common information channel, the first common information channel and the first The two common information channels are on different sub-bands of the same carrier.
  • the first common information channel corresponds to a first service
  • the second common information channel corresponds to a second service
  • the method before the sending the at least two common information channels, the method further includes:
  • the service to be transmitted in the same carrier includes at least two services, where the at least two services include the first service and the second service, where the frame of the first service
  • the structure includes a first service subcarrier spacing, a first service cyclic prefix length, and a subband in which the first service is located;
  • the frame structure of the second service includes a second service subcarrier spacing, a second service cyclic prefix length, and a second service Sub-band.
  • the common information includes a synchronization signal, a broadcast signal, and a system message At least one of them.
  • the frame structure of the first service and the second service are different;
  • the types of the first service and the second service are different.
  • the different frame structures of the first service and the second service include: a sub-band in which the first service is located The sub-bands where the second service is located are different.
  • the frame structure of the first service and the second service are different, including: a first service subcarrier interval and a first The two service subcarrier spacings are different, and the first service CP length is different from the second service CP length; or the first service subcarrier spacing and the second service subcarrier spacing are the same and the first service CP length and the second service CP length are different.
  • the structure of the first common information channel includes a first subcarrier spacing, a cyclic prefix length, a first time domain resource, and a first frequency domain resource;
  • the first common information channel corresponding to the first service includes:
  • the first service subcarrier spacing is the same as the first subcarrier spacing, and the first service CP length is the same as the first CP length; or the first service subcarrier spacing and location The first subcarrier spacing is the same, and the first service CP length is different from the first CP length; and,
  • the first service sub-band is the same as the first sub-band.
  • the structure of the first common information channel includes a first subcarrier spacing, a cyclic prefix length and a first sub-band in which the first common information channel is located;
  • the first common information channel corresponding to the first service includes:
  • the first service sub-band is different from the first sub-band
  • the first service subcarrier spacing is the same as the first subcarrier spacing, and the first service CP length is the same as the first CP length; or the first service subcarrier spacing and location The first subcarrier spacing is the same, and the first service CP length is different from the first CP length.
  • the first public information includes information about the first service sub-band.
  • the structure of the second common information channel includes a second subcarrier spacing, a second cyclic prefix length, and a second subband in which the second common information channel is located;
  • the second common information channel corresponding to the second service includes:
  • the second service subcarrier spacing and the second subcarrier spacing are the same, and the second service CP length and the second CP length are the same; or the second service subcarrier spacing and location The second subcarrier spacing is the same, and the second service CP length is different from the second CP length; and,
  • the second common information channel structure includes a second subcarrier spacing, a second cyclic prefix length and a second sub-band in which the second common information channel is located;
  • the second common information channel corresponding to the second service includes:
  • the second service subcarrier spacing and the second subcarrier spacing are the same, and the second service CP length and the second CP length are the same; or the second service subcarrier spacing and location The second subcarrier spacing is the same, and the second service CP length is different from the second CP length.
  • the second public information includes information about the second service sub-band.
  • the at least two services further include a third service, where the second common information channel further corresponds to The third business,
  • the type of the third service is the same as the type of the second service, or
  • the frame structure of the third service includes a third service sub-carrier interval, a third service cyclic prefix length, and a third service sub-band in which the third service is located;
  • the frame structure of the second service includes a second service sub-carrier interval, and a second service cycle The prefix length and the sub-band where the second service is located;
  • the third service subcarrier spacing and the second service subcarrier spacing are the same and the third CP length and the second CP length are the same, or the third service subcarrier spacing and the second service sub-interval
  • the carrier spacing is the same and the third CP length and the second CP length are different and one subframe in the third service frame structure
  • the last symbol is aligned with the time domain boundary of the last symbol of a sub-frame in the second service frame structure.
  • the second common information channel further corresponding to the third service includes:
  • the second common information includes information of the third service sub-band.
  • the method further includes:
  • the first wireless network device transmits the second common information channel based on the second common information channel request.
  • the second common information channel request is used to trigger the second common information channel at a time Send in the window.
  • the second common information channel request includes the identifier of the second service .
  • the first wireless network device is receiving the Before the second common information channel request, the fourth common information channel is further sent on the same carrier, the fourth common information channel is a basic common information channel, and the structure of the fourth common information channel and the second The structure of the public information channel is different.
  • the structure of the fourth common information channel includes a fourth subcarrier spacing, a fourth cyclic prefix length, and a fourth subband where the fourth common information channel is located;
  • the structure of the second common information channel includes a second subcarrier spacing, and a second a cyclic prefix length and a second sub-band in which the second common information channel is located;
  • the structure of the fourth common information channel and the structure of the second common information channel include:
  • the fourth subcarrier spacing and the second subcarrier spacing are different and the first CP length and the second CP length are different Different; or, the fourth subcarrier spacing and the second subcarrier spacing are the same and the first CP length and the second CP length are different;
  • an embodiment of the present invention provides a wireless network device, including a transceiver unit and a processing unit, where the processing unit is configured to perform the fourth aspect, or any one of the first to the seventeenth aspects of the fourth aspect.
  • the transceiver unit performs data reception and/or transmission under the control of the processing unit.
  • the wireless network device is a base station.
  • an embodiment of the present invention provides a data transmission method, including:
  • the characteristics of the second service include a frame structure of the second service, or a type of the second service, or a type of the second wireless network device.
  • the second common information channel corresponding to the second service includes:
  • the second common information channel corresponds to a frame structure of the second service, or a type of the second service, or a type of the second wireless network device.
  • the frame structure of the second service includes a second service subcarrier interval, a second service cycle prefix length, and a second a second service sub-band in which the service is located;
  • the structure of the second common information channel includes a second sub-carrier interval, a second cyclic prefix length, and a second sub-band in which the second common information channel is located;
  • the frame structure of the second common information channel corresponding to the second service includes:
  • the second service subcarrier spacing and the second subcarrier spacing are the same, and the second service CP length and the second CP length are the same; or the second service subcarrier spacing and location Second The subcarrier spacing is the same, and the second service CP length is different from the second CP length;
  • the second service subcarrier spacing and the second subcarrier spacing are the same, and the second service CP length and the second CP length are the same; or the second service subcarrier spacing and location The second subcarrier spacing is the same, and the second service CP length is different from the second CP length.
  • the common information includes a synchronization signal, a broadcast signal, and a system message At least one of them.
  • the method further includes:
  • the third common information channel According to the characteristic of the third service that is required to be received, where the third common information channel corresponds to the third service; and the third service and the second service are transmitted on the same carrier
  • the third public information channel and the second public information channel are also transmitted on the carrier where the third service and the second service are located.
  • the feature of the third service is different from the feature of the second service, and specifically includes:
  • the frame structure of the third service is different from the frame structure of the second service.
  • the type of the third service is different from the type of the second service.
  • the frame structure of the third service includes a third service subcarrier interval, a third service cycle prefix length, and a third The third service sub-band in which the service is located;
  • the frame structure of the second service includes a second service sub-carrier spacing, a second service cyclic prefix length, and a second service sub-band in which the second service is located;
  • the frame structure of the third service and the frame structure of the second service include:
  • the third service subcarrier spacing and the second service subcarrier spacing are different, and the third service CP length is different from the second service CP length; or the third service subcarrier spacing is the same as the second service subcarrier spacing And the length of the third service CP is different from the length of the second service CP.
  • any one of the first to sixth possible implementation manners of the sixth aspect, the seventh possible implementation manner of the sixth aspect, the method further includes:
  • the second wireless network device sends a request for the second common information channel to the first wireless network device according to the characteristics of the second service that is required to be received, and the second public information channel is delivered based on the request.
  • the second common information channel request is used to trigger the second common information channel in a time window send.
  • the second common information channel request includes an identifier of the second service.
  • the method before the receiving the second common information channel, the method further includes:
  • the second wireless network device receives the first common information channel, where the first common information channel and the second common information channel are transmitted on the same carrier, the first common information channel is a basic public information channel, and the structure of the first common information channel is The structure of the second common information channel is different.
  • the structure of the first common information channel includes a first subcarrier spacing, a first cyclic prefix length, and a first a first sub-band in which the common information channel is located;
  • the structure of the second common information channel includes a second sub-carrier interval, a second cyclic prefix length, and a second sub-band in which the second common information channel is located;
  • the structure of the first common information channel and the structure of the second common information channel are different:
  • the first subcarrier spacing and the second subcarrier spacing are different and the first CP length and the second CP length are different; or the first subcarrier spacing and the second subcarrier spacing are the same and the first CP length and the second CP are Different lengths;
  • the method further includes:
  • the second wireless network device Receiving, by the second wireless network device, the second common information channel according to the characteristic of the fourth service that is required to be received, where the second common information channel further corresponds to the fourth service; and the characteristic of the fourth service includes the frame structure of the fourth service, Or, the type of the fourth business;
  • the type of the fourth service is the same as the type of the second service; or,
  • the frame structure of the fourth service includes a fourth service subcarrier interval, a fourth service cyclic prefix length, and a fourth service subband in which the fourth service is located;
  • the frame structure of the second service includes a second service subcarrier interval, and a second service cycle a prefix length and a second service sub-band in which the second service is located;
  • the fourth service subcarrier spacing and the second service subcarrier spacing are the same and the fourth CP length and the second CP length are the same, or
  • the fourth service subcarrier spacing and the second service subcarrier spacing are the same and the fourth CP length and the second CP length are different and the last symbol in the one of the frame structures of the fourth service and the The time domain boundary alignment of the last symbol in one subframe in the frame structure of the second service.
  • the structure of the second common information channel includes a second subcarrier interval, a second cyclic prefix length, and a a second sub-band in which the second common information channel is located; and the second common information channel further corresponding to the fourth service includes:
  • the fourth service subcarrier spacing and the second subcarrier spacing are the same, and the fourth service CP length and the second CP length are the same; or the fourth service subcarrier spacing and location The second subcarrier spacing is the same, and the fourth service CP length is different from the second CP length; and,
  • the second public information includes information about the fourth service sub-band.
  • a seventh aspect of the present invention provides a wireless network device, including a transceiver unit and a processing unit;
  • the processing unit is configured to perform the method of the sixth aspect, or the method provided in any one of the first to the thirteenth aspects of the sixth aspect, wherein the transceiver unit is in the processing unit Receive and/or transmit data under control.
  • the wireless network device is a terminal.
  • the embodiment of the present invention provides a communication system, including the wireless network device provided in any one of the possible embodiments of the fifth aspect or the fifth aspect, and any one of the seventh aspect or the seventh aspect
  • the wireless network device provided in a possible implementation.
  • the frame structure for wireless communication, the method, device and communication system for data transmission provided by the embodiments of the present invention transmit different common information channels on different sub-bands on the same carrier, thereby achieving multiple transmissions on the same carrier. Effective transmission of public information in a business scenario.
  • 3GPP Third Generation Partnership Project
  • 3GPP Third Generation Partnership Project
  • 3GPP related organization is referred to as a 3GPP organization.
  • a wireless communication network is a network that provides wireless communication functions.
  • Wireless communication networks may employ different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), and time division multiple access (TDMA).
  • Code division multiple access CDMA
  • WCDMA wideband code division multiple access
  • TDMA time division multiple access
  • Frequency division multiple access (FDMA) orthogonal frequency-division multiple access
  • OFDMA orthogonal frequency-division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • carrier sense Carrier sense multiple access with collision avoidance According to the capacity, rate, delay and other factors of different networks, the network can be divided into 2G (generation) network, 3G network or 4G network.
  • a typical 2G network includes a global system for mobile communications/general packet radio service (GSM) network or a general packet radio service (GPRS) network.
  • GSM general packet radio service
  • GPRS general packet radio service
  • a typical 3G network includes a universal mobile communication system (universal mobile communication system).
  • a typical 4G network includes a long term evolution (LTE) network.
  • the UMTS network may also be referred to as a universal terrestrial radio access network (UTRAN).
  • the LTE network may also be referred to as an evolved universal terrestrial radio access network (E-).
  • E- evolved universal terrestrial radio access network
  • UTRAN Universal Terrestriality
  • it can be divided into a cellular communication network and a wireless local area networks (WLAN), where The cellular communication network is dominated by scheduling, and the WLAN is dominated by competition.
  • WLAN wireless local area networks
  • the aforementioned 2G, 3G and 4G networks are all cellular communication networks.
  • embodiments of the present invention are equally applicable to other wireless communication networks, such as 4.5G or 5G networks, or other non-cellular communication networks.
  • embodiments of the present invention sometimes refer to a wireless communication network as a network.
  • the cellular communication network is a type of wireless communication network, which adopts a cellular wireless networking mode, and is connected between the terminal device and the network device through a wireless channel, thereby enabling users to communicate with each other during activities. Its main feature is the mobility of the terminal, and it has the function of handoff and automatic roaming across the local network.
  • a wireless network device refers to a device in a wireless communication network, which may be a terminal, such as a user device, or a network-side device, such as a base station, a network controller, or a mobile switching center.
  • the terminal can communicate with the network side device, or can communicate with another terminal, such as D2D (device to device) or M2M (machine to machine) scenario, and the network side device can communicate with the terminal, or can Another network side device communicates, such as communication between the macro base station and the access point.
  • a user equipment is a terminal device, which may be a mobile terminal device or a non-mobile terminal device.
  • the device is mainly used to receive or send business data.
  • User equipment can be distributed in the network.
  • User equipments have different names in different networks, such as: terminals, mobile stations, subscriber units, stations, cellular phones, personal digital assistants, wireless modems, wireless communication devices, handheld devices, knees.
  • the user equipment can communicate with one or more core networks via a radio access network (RAN) (access portion of the wireless communication network), such as exchanging voice and/or data with the radio access network.
  • RAN radio access network
  • a base station (BS) device also referred to as a base station, is a device deployed in a wireless access network to provide wireless communication functions.
  • a device providing a base station function in a 2G network includes a base transceiver station (BTS) and a base station controller (BSC), and the device providing the base station function in the 3G network includes a Node B (NodeB) and the wireless device.
  • a radio network controller (RNC) which provides a base station function in a 4G network, includes an evolved NodeB (eNB).
  • eNB evolved NodeB
  • a device that provides a base station function is an access point (AP). ).
  • IP Internet Protocol
  • Wireless local area networks refer to local area networks that use radio waves as a data transmission medium.
  • the transmission distance is generally only a few tens of meters.
  • An access point that connects to a wireless network and can also connect to a wired network device. It can be used as an intermediary point to connect wired and wireless Internet devices to each other and transmit data.
  • System information broadcast can be simply referred to as system information, mainly provides the main information of the accessed network, so as to establish a wireless connection with the UE, so that the UE obtains sufficient access information, public configuration of cell selection and reselection. parameter.
  • System messages in LTE are divided into multiple system information blocks (SIBs), one of which is called a master information block (MIB), which is also called a broadcast signal, and other SIBs are called system messages.
  • SIBs system information blocks
  • the LTE system information broadcast and the 3G system information broadcast are functionally identical, but there is still a big difference in scheduling and specific information content.
  • the MIB usually includes a limited number of the most important and most commonly used transmission parameters.
  • Other SIBs usually include cell radio configuration, cell reselection information, neighbor list, home eNB identifier, earthquake tsunami warning (ETWS) or public. Notification information such as alarm (CMAS), multimedia multicast (MBMS) control information and other parameters.
  • CMAS alarm
  • Synchronization signal A signal used by the receiver to implement at least one of frequency synchronization and time synchronization with the sender.
  • the process of establishing an initial connection between wireless network devices The specific wireless network device can be unlimited. It is commonly used between a UE and a base station, between a micro base station and a macro base station. It is also applied between the UE and the UE in the embodiment of the present invention.
  • the frame structure is a structure in which the time resource (time domain) of the signal transmission is divided.
  • the time unit in the frame structure generally used has a radio frame, a subframe and a time slot in descending order.
  • the specific length of time corresponding to each time unit can be determined according to specific protocol requirements.
  • LTE A frame structure is taken as an example: a radio frame has a length of 10 ms and contains 10 subframes, each subframe has a length of 1 ms, and each subframe further includes two slots, each of which ( Slot) 0.5ms.
  • the symbol is the smallest unit in the signal time domain. Taking an LTE network as an example, as shown in FIG. 11, each OFDM subcarrier corresponds to one OFDM symbol.
  • the length of one OFDM symbol (the time taken) is 1/subcarrier spacing.
  • the time occupied by one OFDM symbol is the sum of the length of the OFDM symbol and the length of the cyclic prefix (CP).
  • a guard interval is inserted between each OFDM symbol, and the guard interval length Tg is generally larger than the maximum delay spread of the wireless channel, such that the multipath component of a symbol is Will not cause interference to the next symbol.
  • the guard interval is an idle transmission period.
  • inter-channel interference occurs, that is, the orthogonality between subcarriers is destroyed, causing interference between different subcarriers.
  • the OFDM symbol of the original width T is periodically extended, and the guard interval is filled with the spread signal.
  • Frame number The number of each radio frame. Take the LTE network as an example. The frame number in LTE is from 0-1023, and then renumbered from 0.
  • Resource at least one of a time resource, a frequency domain resource, a code resource, and a space resource
  • Time resource A resource whose signal is measured by time, for example, the signal occupies 2 OFDM symbols in time, or 1 subframe, or 3 radio frames.
  • the time resource may include an absolute time resource and a relative time resource, and the relative time resource may be, but not limited to, at least one of a radio frame number, a relative position of the subframe in the radio frame, and a relative position of the symbol in the subframe. .
  • the time resources are usually described as fixed or variable and are described for relative time resources. Generally, when the time resources are the same, the absolute time resources may be the same, or the relative time resources may be the same.
  • Frequency domain resource A resource whose signal is measured by frequency, for example, the signal accounts for frequency. With 10 MHz, in OFDM systems, the number of subcarriers is usually used to describe the occupied frequency domain resources.
  • Time-frequency resource A resource whose signal is occupied by time and frequency. For example, the signal occupies 2 OFDM symbols in time and occupies 10 MHz on the frequency.
  • Code resource A resource whose signal is occupied by a code, such as a spreading code in WCDMA, or a sequence resource used by a signal is also called a code resource. For example, the sequence used by the synchronization signal.
  • Sequence A type of code resource.
  • Space resources resources occupied by signals are measured by beams.
  • beams with different directions can be transmitted in parallel on the same time-frequency resource.
  • Frame structure of the service including the subcarrier spacing used when transmitting the service data, the CP length, and the frequency domain resources and time domain resources occupied by the service.
  • the frame structure of the service includes at least the subcarrier spacing, the CP length, and the subband in which the service is located.
  • the structure of the channel including the subcarrier spacing used for the transmission channel, the CP length, the time domain resource and the frequency domain resource.
  • the structure of the channel includes at least the subcarrier spacing used for the transmission channel, the CP length, and the subband in which the channel is located.
  • the channel of the basic public information may be a common information channel type predefined by the system or protocol, such as a legacy synchronization channel in LTE; or a service type defined in advance, and the corresponding public information channel is a basic public information channel.
  • Carrier Consists of a contiguous range of frequency domain resources on the spectrum.
  • the bandwidth of this carrier is the system bandwidth.
  • current LTE can support system bandwidths of 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz.
  • Sub-band The resources on the above carrier are subdivided, and the continuous frequency domain resources obtained by each segment are called sub-bands of the carrier.
  • FIG. 1 is a schematic structural diagram of a resource grid in an OFDM system according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a base station sending different service data to multiple UEs according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a frame structure corresponding to four common services according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a frame structure of a synchronization channel corresponding to multiple carriers and multiple services corresponding to multiple carriers in an FDD according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a frame structure of a synchronization channel corresponding to multiple carriers and multiple services corresponding to multiple carriers in a TDD according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a time domain location of a synchronization signal of a unicast service according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a frequency domain location of a synchronization signal of a unicast service according to an embodiment of the present disclosure
  • FIG. 8 is a schematic diagram of a time domain location of a synchronization signal of a 7.5 KHz dedicated broadcast multicast service according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a frequency domain location of a synchronization signal of a 7.5 KHz dedicated broadcast multicast service according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of a triggering process of a specific service synchronization channel SCH according to an embodiment of the present disclosure
  • FIG. 11 is a schematic diagram of three UEs in a base station according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of a frame structure of four synchronization signals and four services transmitted by a base station in the scenario of FIG. 11 according to an embodiment of the present disclosure
  • FIG. 13 is a schematic flowchart diagram of a method for sending public information according to Embodiment 1 of the present invention.
  • FIG. 14 is a schematic flowchart of a method for sending public information according to Embodiment 2 of the present invention.
  • FIG. 15 is a schematic structural diagram of a communication system according to Embodiment 4 of the present invention.
  • FIG. 16 is a schematic diagram of a frame structure of an LTE network according to an embodiment of the present invention.
  • a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread in execution, a program, and/or a computer.
  • an application running on a computing device and the computing device can be a component.
  • One or more components can reside within a process and/or thread of execution, and a component can be located in a computer and/or distributed between two or more computers. Moreover, these components can execute from various computer readable media having various data structures thereon.
  • These components may be passed, for example, by having one or more data packets (eg, data from one component that interacts with the local system, another component of the distributed system, and/or signaled through, such as the Internet)
  • the network interacts with other systems to communicate in a local and/or remote process.
  • the present application describes various aspects in connection with a wireless network device, which may be a base station or a terminal, such as a user equipment.
  • the user equipment may also be referred to as a user terminal, and may include a system, a subscriber unit, a subscriber station, a mobile station, a mobile wireless terminal, a mobile device, a node, a device, a remote station, a remote terminal, a terminal, a wireless communication device, and a wireless communication.
  • User equipment can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, smart phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), laptop computers, handheld communication devices, handheld computing Devices, satellite wireless devices, wireless modem cards, and/or other processing devices for communicating over wireless systems.
  • a base station may also be referred to as an access point, a node, a Node B, an evolved Node B (eNB), or some other network entity, and may include some or all of the functions of the above network entities.
  • the base station can communicate with the wireless terminal over the air interface. This communication can be done by one or more sectors.
  • the base station can act as a router between the wireless terminal and the rest of the access network by converting the received air interface frame to an IP packet, wherein the access network includes an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate the management of air interface attributes and can also be a gateway between the wired network and the wireless network.
  • the application will present various aspects, embodiments, or features in a system that can include multiple devices, components, modules, and the like. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules, etc. discussed in connection with the figures. In addition, a combination of these schemes can also be used.
  • exemplary is used to mean an example, an illustration or a description. Any embodiment or design described as "exemplary” in this application should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of an exemplary term is intended to present a concept in a specific manner.
  • the various disclosed embodiments can be incorporated into a communication system.
  • the communication system uses Orthogonal Frequency Division Multiplexing (OFDM), where OFDM effectively partitions the overall system bandwidth into multiple sub-carriers, where these sub-carriers are also referred to as frequency sub-channels, tones, or frequency bands.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the network architecture and the service scenario described in the embodiments of the present invention are used to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute a limitation of the technical solutions provided by the embodiments of the present invention.
  • the technical solutions provided by the embodiments of the present invention are equally applicable to similar technical problems.
  • the following describes the scenario of a 4G network in a wireless communication network as an example.
  • the LTE network employs OFDM technology.
  • OFDM is a multi-carrier transmission method in which the multiplexed signals (each subcarrier) are orthogonal.
  • OFDM technology converts high-speed data streams into multiple parallel low-speed data streams by serial/parallel conversion, and then distributes them to sub-channels on several sub-carriers of different frequencies for transmission.
  • the OFDM technology utilizes mutually orthogonal subcarriers, and each subcarrier corresponds to one symbol, so that the spectrum of the subcarriers is overlapped, which can greatly improve the spectrum utilization.
  • the subcarrier spacing ⁇ f refers to the frequency difference of two adjacent subcarriers in an OFDM system.
  • the OFDM system bandwidth is equal to the subcarrier spacing multiplied by the system theoretical maximum number of subcarriers.
  • the maximum number of subcarriers in the system theory is the maximum number of subcarriers without considering the frequency guard band, but in reality, the OFDM system usually reserves about 10% of the guard bandwidth, so the number of subcarriers actually configured by the system will be smaller than the maximum subcarrier. number.
  • the frame type Type1 is suitable for full-duplex and half-duplex FDD (frequency division duplexing).
  • Two consecutive time slots labeled 2i and 2i+1 form one subframe i, and the subframe length is 1 ms, and the number is 0-9.
  • the resources available for both downlink and uplink transmissions are 10 subframes because their uplink and downlink transmissions are separated in the frequency domain.
  • the frame type Type2 is used for TDD.
  • the lengths of DwPTS and UpPTS are configurable, but the total length of DwPTS, UpPTS, and GP is 1 ms.
  • Subframes 1 and 6 contain DwPTS, GP and UpPTS; other subframes are defined as: slot 2i and slot 2i+1 form subframe i.
  • Subframe 0 and subframe 5 can only be used for downlink transmission. Support flexible uplink and downlink configuration, support 5ms and 10ms switching point cycle.
  • a cyclic prefix CP is introduced.
  • the cyclic prefix refers to a cyclic copy in which the guard interval between subcarriers is set to a symbol sequence, that is, a sample in the last Tg time of each OFDM symbol is copied to the front of the OFDM symbol to form a prefix, where Tg is the length of the guard interval. Since the multipath delay spread is related to the cell radius and the radio channel propagation environment, the cell radius is generally larger and the delay spread is larger, and the SF SFN (single-Frequency network) also needs a larger CP length.
  • LTE defines two types of CP lengths: a short CP, which is applied to a small cell environment, and optimizes the CP overhead; a long CP (also called an extended CP), which is applied to a case where time dispersion is large or SFN operation is performed.
  • Number of OFDM symbols in one slot Depending on the CP length and the subcarrier spacing, specifically, the time occupied by one OFDM symbol is the sum of the OFDM symbol length (time occupied) and the CP length, and the OFDM symbol length is 1/subcarrier spacing. In the case where the subcarrier spacing is 15 kHz, there are two CP lengths corresponding to 7 OFDM symbols and 6 OFDM symbols per slot, respectively. In the case where the subcarrier spacing is 7.5 KHz, there is only one CP length corresponding to 3 OFDM symbols per slot.
  • Subcarriers and The OFDM symbol composition is called a resource grid, and the structure of the resource grid is shown in Figure 1. The value depends on the bandwidth of the downlink transmission and is satisfied among them with Minimum and maximum downlink transmission bandwidth supported.
  • An element of the resource cell of the antenna port p is called a resource element, and is uniquely determined by the frequency domain and the time domain coordinates (k, l), wherein The physical meaning is a modulation symbol on a certain subcarrier in one slot in the LTE system.
  • a resource block (RB) is used to describe a mapping of a specific physical channel to a resource unit.
  • a physical resource block is defined as occupied in the time domain Continuous OFDM symbols, occupying consecutive channels in the frequency domain
  • the resources of the subcarriers Illustrative, with Can be given by the table below.
  • a physical resource block contains The resource unit has a duration of one slot in the time domain and 180 kHz in the frequency domain.
  • the number of physical resource blocks in the frequency domain is from 0 to
  • the correspondence between the number n PRB and the resource unit (k, l) of the physical resource block in the frequency domain is: Where k is the frequency domain index and l is the time domain index.
  • the UE In the existing wireless communication network, taking the LTE network as an example, if the UE wants to access the LTE cell, it must perform a cell search process, that is, the UE detects the cell identifier (ID) and obtains the small The process of time-frequency synchronization.
  • ID cell identifier
  • the cell search is a process in which the UE implements downlink time-frequency synchronization with the E-UTRAN and acquires the serving cell ID.
  • the basic cell search process is divided into two steps:
  • Step 1 The UE demodulates the primary synchronization signal to implement symbol synchronization, and obtains the ID of the intra-cell group to implement coarse frequency offset estimation;
  • Step 2 The UE demodulates the secondary synchronization signal to implement frame synchronization, and acquires the CP length and the cell group ID to implement precise frequency offset estimation.
  • the serving cell ID is called the physical layer cell ID (represented as )
  • the ID in the cell group is called the physical layer ID (represented as ) refers to the physical layer ID in the physical layer cell ID group
  • the cell group ID is called the physical layer cell ID group (represented as ).
  • the cell search is started, and the bandwidth and frequency of the network are not known when the UE is powered on for the first time;
  • the UE repeats the basic cell search process and traverses the frequency points of the entire spectrum to try to demodulate the synchronization signal. This process takes a long time, but generally the time requirement is not strict, and the UE initialization time can be shortened by some methods. If the UE stores the previously available network information, the network is preferentially searched after booting;
  • the serving cell ID is obtained, that is, after the cell search is completed, the UE demodulates the downlink physical broadcast channel (PBCH), and acquires system information such as system bandwidth and number of transmitting antennas;
  • PBCH downlink physical broadcast channel
  • the UE demodulates the physical downlink control channel (PDCCH), acquires a paging cycle assigned by the network to the UE, and then demodulates from the IDLE state in a fixed paging cycle.
  • PDCCH physical downlink control channel
  • PDCCH listening for paging.
  • Demodulation designation if there is a page belonging to the UE Physical downlink shared channel (PDSCH) resources, receiving paging;
  • the UE initiates a call, the UE initiates a random access (such as a physical random access channel (PRACH)), and requires allocation of an uplink resource, and acquires an uplink resource by reading a control channel, such as a PDCCH, and then performs uplink transmission (eg, by physical uplink).
  • a random access such as a physical random access channel (PRACH)
  • PRACH physical random access channel
  • PDCCH physical downlink control channel
  • PUSCH Physical uplink
  • the carrier is composed of a contiguous frequency domain resource in the spectrum, and the resources on the carrier are subdivided.
  • the contiguous frequency domain resource obtained in each segment is referred to as a sub-band of the carrier in the embodiment of the present invention.
  • the information available for cell synchronization includes timing information of symbols and radio frames, frequency information, cell ID, CP length, system bandwidth, and antenna configuration (read from PBCH).
  • the synchronization process uses two physical signals, a primary synchronization signal (PSS, also called primary synchronization channel PSCH) and a secondary synchronization signal (SSS, also called secondary synchronization channel SSCH).
  • PSCH primary synchronization signal
  • SSCH secondary synchronization channel SSCH
  • the primary synchronization signal is used to acquire a 5 ms clock and an intra-cell ID
  • the secondary synchronization signal is used to acquire a radio frame clock and a cell group ID.
  • the existing LTE synchronization channel is located in subframes 0 and 5 of each radio frame, and in the frequency domain, it occupies 6 PRBs in the middle of the bandwidth.
  • the primary synchronization signal is mapped to the last symbol of the first time slot (time slot 0) and the eleventh time slot (time slot 10) of each radio frame, that is, In the frequency domain, the primary synchronization signal is mapped to 62 subcarriers in the vicinity of a DC (direct current) subcarrier (no data symbols are transmitted on the carrier).
  • the secondary synchronization signal is mapped to slot 0 of each radio frame and the penultimate symbol of slot 10; in the frequency domain, the secondary synchronization signal is also mapped to 62 subcarriers near the DC subcarrier.
  • the primary synchronization signal is located on the third symbol of the third and thirteenth slots, and the secondary synchronization signal is three symbols earlier than the primary synchronization signal, that is, the secondary synchronization signal is located at the second and the twelfth.
  • the primary synchronization channel and the secondary synchronization channel are collectively referred to as a synchronization channel.
  • the scattered carrier refers to a free portion with a small bandwidth distributed on the carrier.
  • a base station can simultaneously send multiple types of services to multiple UEs, and can also send to one UE.
  • Many types of business include MTC services, D2D services, unicast services, and multicast services.
  • 2 is a schematic diagram of a base station transmitting different service data to multiple UEs.
  • the frame structure of the service includes a subcarrier spacing, a CP length, and a frequency domain resource and a time domain resource used by the service.
  • the structure of the channel includes subcarrier spacing, CP length, time domain resources and frequency domain resources used in transporting the channel.
  • the time domain resource may include an absolute time or a relative time, where the relative time may include a relative position of the occupied symbol in the subframe, or a relative position of the occupied subframe in the radio frame, or a radio frame occupied by Frame number, etc.
  • the frequency domain resources may also include absolute frequencies or relative frequencies, where the relative frequencies may include the locations of the frequencies of the occupied RBs in one carrier.
  • Figure 3 shows the frame structure of several common services. From top to bottom, the subcarrier spacing is 15KHz, and the frame structure of the normal CP unicast service is 1 (normal CP (NCP), 15KHz).
  • subcarrier spacing 15KHz subcarrier spacing 15KHz
  • frame structure 2 corresponding to the multicast service of the extended CP (extended CP (ECP), 15KHz
  • frame structure 3 corresponding to the narrowband MTC service with subcarrier spacing of 1.25KHz (NW (narrow bandwidth) ), 1.25 kHz)
  • a frame structure 4 WW (wide bandwidth), 150 kHz) corresponding to a high frequency broadband service with a subcarrier spacing of 150 kHz.
  • WW wide bandwidth
  • 150 kHz corresponding to a high frequency broadband service with a subcarrier spacing of 150 kHz.
  • the frame structure corresponding to various types of services may not be aligned in the time domain due to the difference of the subcarrier spacing and the CP length corresponding to various types of services, such as frame structure 1 and frame structure 3. Align.
  • the synchronization channel is only transmitted in six PRBs in the middle of one carrier frequency band, and the time-frequency position of the synchronization channel and the sub-carrier spacing are 15 kHz, and the frame structure of the normal CP corresponds, which may result in some types.
  • the business cannot achieve access synchronization through existing solutions.
  • the time-frequency position and the sub-carrier spacing are 15 kHz, and the synchronization channel corresponding to the frame structure of the normal CP is called a legacy synchronization channel.
  • the embodiment of the invention provides a method for transmitting public information, which can be used for a field where multiple services exist. view.
  • the public information may include at least one of a synchronization signal, a broadcast signal, and a system message.
  • a description is made by taking a wireless network device as a base station and a UE as an example.
  • multiple services are transmitted in the same carrier, and channels of common information corresponding to any one of the multiple services are also transmitted in the same carrier.
  • the channel of the public information refers to a channel for carrying public information.
  • multiple services can be transmitted on the same subframe of the same carrier.
  • the channels of the two common information corresponding to the at least two services in the multiple services may also be transmitted in the same subframe of the same carrier, where the carrier of the channel transmitting the common information and the carrier transmitting the foregoing service the same.
  • multiple services may be services between multiple UEs, or may be services with the same UE.
  • the structure of the channel of the public information may correspond to a service feature, where the service feature may include at least one of a type of the service and a frame structure of the service.
  • the service feature may include at least one of a type of the service and a frame structure of the service.
  • the relationship between the type of the normal service (which can be abbreviated as the service type) and the frame structure of the service (which can be abbreviated as the service frame structure) may be: multiple types of services correspond to one frame structure, or different types of services.
  • one type of service may correspond to multiple frame structures, which is not limited herein.
  • the structure of the channel of the public information corresponds to the frame structure of the service:
  • the structure of the channel of the common information may correspond to the frame structure of the service, so that the service with a certain frame structure (such as the service of the frame structure A) may be based on the public information corresponding thereto.
  • the access of the channel avoids the problem that some types of services in the prior art cannot access the channel of the existing public information.
  • the structure of the channel of the public information may correspond to the frame structure of the service, including: having a certain A frame-structured service (such as the service of frame structure A) and its corresponding common information channel (such as channel A) have the same subcarrier spacing and CP length.
  • a certain A frame-structured service such as the service of frame structure A
  • its corresponding common information channel such as channel A
  • the channel having the certain frame structure and the channel corresponding to the common information can be aligned in the time domain to facilitate access of the service.
  • the structure of the channel of the common information may correspond to the frame structure of the service, including: a service having a certain frame structure (such as the service of the frame structure A) and a channel (such as channel A) corresponding to the common information.
  • the corresponding frequency domain resources e.g., the sub-band occupied by the channel corresponding to the common information and the sub-band occupied by the service having a certain frame structure are the same. In this way, the UE can perform blind detection only for the frequency band corresponding to the service to be accessed when the UE accesses, which can reduce the complexity and power saving of the UE.
  • the structure of the channel of the common information may correspond to the frame structure of the service, where the service having a certain frame structure (such as the service of the frame structure A) and the channel (such as the channel A) corresponding to the common information have the same Subcarrier spacing, different CP lengths.
  • the synchronization channel in the channel of the common information occupies at least the last symbol in one subframe, and the subframe in which the symbol is located is aligned with the time domain boundary of the subframe in the frame structure of the service.
  • the channel with the certain frame structure and the channel corresponding to the common information can be aligned in the time domain to facilitate the access of the service, and on the other hand, the channel of the common information can be the service with the different frame structure. Sharing can reduce the resources occupied by the channel of public information.
  • the structure of the channel of the public information may correspond to the frame structure of the service: a channel having the same type of service corresponding to the same common information.
  • the channel of the common information can be allocated according to the type of the service, so that the UE can only pay attention to the service of the type received by the UE when receiving different types of services.
  • the channel of public information can be.
  • the public information transmitted on the sub-band of one of the services may carry the sub-band information of the other service. It can be understood that if the offset of the sub-bands of the two is fixed, the information of the sub-band may not be carried.
  • the structure of the channel of the common information may correspond to the frame structure of the service, where the service having the same subcarrier interval and the same CP length corresponds to the same common information channel, or has a phase Traffic with the same subcarrier spacing and different CP lengths corresponds to the same common information channel.
  • the channel of the common information can be allocated according to the frame structure of the service, instead of the channel for allocating the common information according to the type of the service. Since different types of services may have the same frame structure, the resources occupied by the channel of the common information can be reduced. .
  • the common information transmitted on the sub-band of one of the services may carry the sub-band information of another service. It can be understood that if the offset of the sub-bands of the two is fixed, the information of the sub-band may not be carried.
  • the structure of the channel of the common information may correspond to the frame structure of the service, including: a service having a certain frame structure (such as the service of the frame structure A) and a channel (such as channel A) corresponding to the common information.
  • the codeword resources correspond. That is, the services of different frame structures have different codeword resources used for the channels of the corresponding common information. In this way, it is convenient for the UE to identify the channel of the corresponding public information when receiving the service of a certain frame structure.
  • the structure of the channel of the public information may correspond to the frame structure of the service, if the service with a certain frame structure (such as the service of the frame structure A) and the channel corresponding to the common information (such as the channel A)
  • the frequency domain resources used correspond to each other, and the codeword resources used by the services of different frame structures and the channels corresponding to the common information may be the same or different.
  • the UE can identify the channel of its corresponding public information through the frequency domain resource when receiving the service of a certain frame structure.
  • the service of the different frame structure and the codeword resource used by the channel corresponding to the common information may be the same, the use of the codeword resource may be reduced, and the implementation complexity of the transmitting side and the receiving side may be reduced.
  • the structure of the channel of the public information may correspond to the frame structure of the service, if the service with a certain frame structure (such as the service of the frame structure A) and the channel corresponding to the common information (such as the channel A)
  • the frequency domain resources used correspond to each other, and the services of different frame structures and the time domain resources used by the channels corresponding to the common information may be the same or different.
  • the UE can identify the channel of its corresponding public information through the frequency domain resource when receiving the service of a certain frame structure.
  • the implementation complexity of the transmitting side and the receiving side can be reduced.
  • the service of a certain frame structure (such as the frame structure B)
  • the information of the corresponding public information channel (such as channel B) carrying the service for other frame structures (such as the service of frame structure C) for access (channel B carrying the access information is called channel C)
  • channel C For example, in a channel of a common information, frequency information required for accessing another frame structure service, such as an offset from a frequency of a channel of existing common information, and/or
  • the time information of a channel of a common information carrying a service of another frame structure for accessing such as the time difference with the channel of the existing common information, in order to realize service access of different frame structures while reducing Use of resources.
  • the transmission of the channel (such as channel A or channel C) of the common information corresponding to the service of a certain frame structure may be triggered by the UE and then sent.
  • the triggering of the UE is sent after the UE synchronizes with the base station through the channel of another common information.
  • the channel of the common information (such as channel B) can be synchronized with the base station first, for example, through the channel of the existing common information, and then the service needs to be transmitted.
  • the base station is triggered to deliver a channel of public information corresponding to the service, thereby implementing transmission of the service.
  • the structure of the channel of public information may correspond to the type of service.
  • the service type is the same, the frame structure of the service is the same (for example, the subcarrier spacing is the same and the CP length is the same, or the subcarrier spacing is the same and the CP length is different), and the service type is different, the service frame structure may be the same. It may be different, that is, when the number of service types is larger than the frame structure of the corresponding service, the configuration of the channel of the common information is performed in a manner corresponding to the type of the service using the structure of the channel of the common information.
  • the method (2) differs from the above method (1) in that the structure of the channel of the public information can correspond to the type of the service, so that a certain type of service (such as service A) can be based on the channel corresponding to the public information (eg, The access of the channel A) avoids the problem that some types of services in the prior art cannot access the channel of the existing public information.
  • a certain type of service such as service A
  • the service of a certain frame structure mentioned in the above method correspondingly becomes a certain type of service.
  • Other descriptions of the frame structure related to this type of service can be referred to the description in the above method, and will not be described herein.
  • the correspondence between the type of the service and the frame structure of the service may be one-to-many, one-to-one, or many-to-one, and the type and service considering the service may be adopted when configuring the channel of the public information.
  • the frame structure is combined in a way.
  • the frame structure may be further considered to configure the channel of the common information.
  • the system is designed to configure two channels of common information, and the system configures two channels of common information for the two types of services, respectively. The transmission of public information corresponding to these two services.
  • the frame structure can be further considered to perform the common information channel after considering the service type.
  • the configuration may be such that the channels for configuring two common information are respectively located in the respective sub-bands of the two services according to preset rules or requirements, or the channel for configuring one public information is located in the sub-band of one of the services, and A service shares a channel of the public information, and the channel of the public information carries frequency domain resource information of the other service.
  • the frame structure can be considered first, and then the service type is considered.
  • the principle and method are the same as the foregoing considering the frame structure or the service type separately, or considering the service type and then considering the frame structure, which will not be repeated here.
  • the configuration or transmission of the common information channel provided by the embodiment of the present invention is related to (corresponding to) the transmitted service, the reception of the required common information before transmission of a plurality of different services can be realized.
  • the UE may perform corresponding public information channel reception according to the service to be transmitted, for example, in the case that the frequency synchronization time is out of synchronization, the cell search may be performed only in a certain sub-band related to the service to be transmitted, thereby The implementation complexity of the UE can be reduced, and the resource consumption of the UE can be saved.
  • the first embodiment of the present invention provides a structure of a channel of public information, which can be used in a scenario where multiple types of services exist.
  • the public information may include, but is not limited to, at least one of a synchronization signal, a broadcast signal, and a system message.
  • the structure of the channel includes:
  • a channel including at least two pieces of common information on a same carrier the channel of the at least two common information including a channel of the first common information and a channel of the second common information, a channel of the first common information, and a channel
  • the channels of the two common information are on different sub-bands.
  • the first public information and the second public information may have the same function.
  • both are primary synchronization signals, or both are secondary synchronization signals.
  • the channels of the two common information occupy different time domain resources and/or codeword resources.
  • the channels of the two common information occupy intermediate resource blocks (RBs) of the respective sub-bands.
  • the channel structure of the first common information and the channel structure of the second common information are different.
  • the primary synchronization signal and the secondary synchronization signal since the primary synchronization signal and the secondary synchronization signal are used together to achieve synchronization, the primary synchronization signal and the secondary synchronization signal form a common information channel (i.e., a synchronization channel). It can be understood that in some networks, such as future networks, the synchronization channel may include only one synchronization signal (not distinguishing between primary and secondary). This embodiment of the present invention does not limit this.
  • the at least two services may also be included in the same carrier.
  • the first and second are used to distinguish between a channel and a description corresponding to the channel.
  • any one of the channel structures includes a subcarrier spacing, a CP length, a time domain resource, and a frequency domain resource used for transmitting the channel.
  • the frequency domain resource includes the occupied sub-band.
  • the channel structure of the first common information includes at least a first subcarrier spacing used for transmitting the channel, a first CP length and a first subband; and a channel structure of the second common information includes a second sub Carrier spacing, second CP length and second sub-band.
  • the above public information includes at least one of a synchronization signal, a broadcast signal, and a system message.
  • the channel structure of the first common information and the channel structure of the second common information may include: the first subcarrier spacing and the second subcarrier spacing are different, and the first cyclic prefix length and the second cyclic prefix length are different.
  • the channel structure of the first common information and the channel structure of the second common information may include: the first subcarrier spacing and the second subcarrier spacing are the same and the first cyclic prefix length and the second cyclic prefix length are different.
  • the foregoing structure further includes:
  • the channel structure of the first public information corresponds to the first service characteristic
  • the channel structure of the second common information corresponds to the second service characteristic
  • the first or second service characteristic may include a service type and a service At least one of the frame structures. It can be understood that, when the first service feature is a service type, the description of the second service feature is also for the service type. When the first service feature is a service frame structure, the description of the second service feature is also for the service frame structure. .
  • the structure of the channel includes:
  • the sub-carrier spacing of the channel of the first common information and the channel of the second common information is the same and the CP length is different, or the channel of the first common information and the channel of the second common information
  • the carrier spacing is different and the CP length is different.
  • the first public information and the second public information may have the same function.
  • both are primary synchronization signals, or both are secondary synchronization signals.
  • the channels of the two common information occupy different time domain resources and/or codeword resources.
  • the time domain resource herein may refer to the relative position of the occupied symbol position in the subframe in which it is located.
  • the channels of the two common information occupy the intermediate resource blocks (RBs) of the sub-bands in which they are located.
  • the channel structure of the first common information and the channel structure of the second common information are different.
  • the at least two services may also be included in the same carrier.
  • the first and second are used to distinguish between a channel and a description corresponding to the channel.
  • any one of the channel structures includes a subcarrier spacing, a CP length, a time domain resource, and a frequency domain resource used for transmitting the channel.
  • the frequency domain resource includes the occupied sub-band.
  • the time domain resource includes the time period occupied.
  • the channel structure of the first common information includes at least a first subcarrier spacing used for transmitting the channel, a first CP length and a first time period; and a channel structure of the second common information includes a second sub Carrier spacing, second CP length and second time period.
  • the above public information includes at least one of a synchronization signal, a broadcast signal, and a system message.
  • the channel structure of the first common information and the channel structure of the second common information may include: the first subcarrier spacing and the second subcarrier spacing are different and the first cyclic prefix length and the second loop before The length of the patch is different.
  • the channel structure of the first common information and the channel structure of the second common information may include: the first subcarrier spacing and the second subcarrier spacing are the same and the first cyclic prefix length and the second cyclic prefix length are different.
  • the foregoing structure further includes:
  • the channel structure of the first public information corresponds to the first service characteristic
  • the channel structure of the second common information corresponds to the second service characteristic.
  • the first or second service characteristic may include at least one of a service type and a service frame structure. It can be understood that, when the first service feature is a service type, the description of the second service feature is also for the service type. When the first service feature is a service frame structure, the description of the second service feature is also for the service frame structure. .
  • a specific description of a channel structure or a transmission method is performed by taking a channel of a common information as a synchronization channel as an example.
  • the resource may include at least one or more of a time domain resource, a frequency domain resource, and a codeword resource.
  • the occupation of different resources includes at least one of the three resources of the occupied time domain resource, the frequency domain resource, and the codeword resource.
  • At least two synchronization channels may be transmitted on different sub-bands of the same carrier, that is, frequency division multiplexing.
  • the first synchronization channel is transmitted on the first sub-band (sub-band 1) of the same carrier
  • the second synchronization channel is transmitted on the second sub-band (sub-band 2) of the carrier.
  • the first service is also sent in the first sub-band (sub-band 1).
  • the first synchronization channel occupies the middle position of the first sub-band
  • the second service is in the second sub-band (child Transmitted on the frequency band 2)
  • the second synchronization channel occupies an intermediate position of the second sub-band (ie, an intermediate resource block).
  • the first synchronization channel and the second synchronization channel may be located at the same or different symbol positions of the same subframe, or at the same symbol position of different subframes, or bits. Different symbol positions for different sub-frames.
  • At least two synchronization channels may be transmitted on different time periods of the same sub-band (sub-band 3) of the same carrier, and are separately multiplexed.
  • the first service and the second service are also sent on different time periods of the sub-band 3, and are instantaneously divided and multiplexed.
  • the first synchronization channel is sent in a time period in which the first service is located
  • the second synchronization channel is sent in a time period in which the second service is located
  • the specific locations of the first synchronization channel and the second synchronization channel may be determined according to implementation.
  • the first synchronization channel may be located in the middle of the sub-band 3 in frequency
  • the second synchronization channel may also be located in the middle of the sub-band 3 in frequency.
  • the first synchronization channel and the second synchronization channel may use the same sequence or different sequences.
  • the time domain resources of the first synchronization channel and the second synchronization channel may be the same or different.
  • the 15 Mbps FDD frame type, the unicast service of the extended CP, and the 7.5 kHz extended broadcast multicast service of the CP are taken as an example.
  • the time-frequency location, resource mapping, and corresponding sequence of the synchronization channels of the two may be as shown in FIG. 6. -9 is shown.
  • FIG. 6 is a schematic diagram of a time domain location of a synchronization signal of a unicast service
  • FIG. 7 is a schematic diagram of a frequency domain location of a synchronization signal of a unicast service.
  • the subframe length is 1 ms
  • one subframe includes two slots, and each slot is 0.5 ms as an example.
  • the unicast synchronization signal time domain is located in the last two symbols of the first slot
  • the frequency domain is located in the middle of six resource blocks (RB) (1.08 M) (primary synchronization signal) Same as the frequency domain resource used by the secondary synchronization signal).
  • RB resource blocks
  • the primary synchronization signal (P-SCH) adopts the ZC sequence (the specific sequence generation can refer to the prior art), the root index is 25, 29, 34, and the resource mapping is mapped to 62 subcarriers near the DC, and the reciprocal of the first slot. The first symbol.
  • the secondary synchronization signal (S-SCH) adopts the M sequence (the specific sequence generation can refer to the prior art), and the resource is mapped to 62 subcarriers near DC, and the second last symbol of the first slot.
  • FIG. 8 is a schematic diagram of a time domain location of a synchronization signal of a 7.5 KHz dedicated broadcast multicast service
  • FIG. 9 is a schematic diagram of a frequency domain location of a synchronization signal of a 7.5 KHz dedicated broadcast multicast service.
  • the sub-frame in Figure 8 The length is 1 ms, and one subframe includes two slots, and each slot is 0.5 ms as an example.
  • one slot contains three symbols, and the synchronization signal includes a primary synchronization signal and a secondary synchronization signal.
  • the time domain is located on the last symbol of the first slot, and the frequency domain is located in the middle 12 RBs (1.08). M).
  • the primary synchronization signal uses a ZC sequence, and the root index may be a different root index (e.g., 23, 27, 37) than the aforementioned unicast traffic to generate different primary synchronization signals.
  • Mapped to 62 subcarriers near DC Figure 6 shows PSC.
  • the secondary synchronization signal adopts an M sequence, which may be the same as the sequence generated by the foregoing unicast service (the generation manner is unchanged) or different, and is mapped to 62 subcarriers on both sides of the primary synchronization signal, as shown in FIG. 9 (as shown in FIG. 9). ).
  • At least two services are transmitted in the same carrier, and at least two services include a first service and a second service.
  • the first frame structure corresponding to the first service and the second frame structure corresponding to the second service may be different: the first frame structure and the second frame structure have different subcarrier spacings and different CP lengths.
  • a first synchronization channel is allocated for the first service and a second synchronization channel is allocated for the second service in the same carrier.
  • the subcarrier spacing and the CP length of the first synchronization channel are the same as those of the first service, and the subcarrier spacing and CP length of the second synchronization channel are the same as those of the second service.
  • the third service corresponds to a third frame structure
  • the third frame structure and the second frame structure have the same subcarrier spacing, and the CP length is different, but one subframe
  • the second synchronization channel corresponding to the second frame structure may also correspond to the third frame structure, that is, corresponding to the third service. That is to say, the second service and the third service share one synchronization channel.
  • the fourth service corresponds to the fourth frame structure
  • the fourth frame structure and the second frame structure have the same subcarrier spacing
  • the second synchronization corresponding to the second frame structure The channel may also correspond to a fourth frame structure, ie corresponding to the fourth service. That is to say, the second service and the fourth service share one synchronization channel.
  • the first service is shared with other services, and the first service can be shared with other services when the first service has a relationship with a frame structure corresponding to other services.
  • the first service or the second service is generally referred to, and the first and second are used to distinguish the descriptions of the two services, and no other limited.
  • the sharing principle of the synchronization channel is more severe.
  • the third service corresponds to the third frame structure, and when only the third frame structure and the second frame structure have the same subcarrier spacing and the CP length is the same, the second frame structure corresponds to the second frame structure.
  • the synchronization channel may also correspond to a third frame structure, ie corresponding to the third service. That is to say, the second service and the third service share one synchronization channel.
  • the fourth service corresponds to the fourth frame structure, the fourth frame structure and the second frame structure have the same subcarrier spacing, and the CP length is different, regardless of the last symbol included in the subframe.
  • the fourth frame structure and the second frame structure do not share one synchronization channel, but the fourth synchronization channel corresponding to the fourth service is allocated to the fourth service in the same carrier.
  • the first service is shared with other services, and the first service can be shared with other services when the first service has a relationship with a frame structure corresponding to other services.
  • a synchronization channel The first service or the second service is generally referred to, and the first and second descriptions for distinguishing two services are not limited.
  • the principle of whether the synchronization channels described above are shared is to see whether the subcarrier spacing corresponding to the service is the same.
  • the synchronization channels cannot be shared; when the subcarrier spacing is the same, the further If the time domain boundary of the last symbol in one subframe of the frame structure corresponding to the service is aligned, and the time domain boundaries of the last symbol in one subframe are not aligned, the synchronization channels may not be common.
  • the lengths of the CPs may be the same. If they are the same, the synchronization channels may be common.
  • the time domain boundaries of the last symbol in the frame are aligned.
  • the time domain boundaries of the last symbol in one subframe are aligned, and the synchronization channel can be shared; when a stricter sharing principle is adopted, the time domain boundaries of the last symbol in one subframe are aligned.
  • the sync channel is also not shared.
  • some modifications or additions to the existing LTE protocol may be used in a subframe of a frame structure corresponding to each service sharing a carrier in the new protocol. The time domain boundaries of the last symbol are aligned.
  • the subframe length in the existing LTE protocol may be modified, so that the subframe length is defined as being available in the new protocol.
  • N times the least common multiple of the symbol length (including the CP length) of multiple services that can share the same carrier (the value of N is selected in a positive integer greater than or equal to 1, and the specific value may be determined by other factors) In this way, the time domain boundaries of the last symbol in one subframe of the frame structure corresponding to the multiple services sharing the same carrier can be aligned.
  • the length of the CP in the existing LTE protocol may be supplemented or modified, so that the CP length in the new protocol is designed for the CP length of multiple services that may share the same carrier, so that the frame structure corresponding to each service is The time domain boundaries of the last symbol within a sub-frame are aligned.
  • the subframe length and the CP length in the existing LTE protocol are modified or supplemented such that the time domain boundaries of the last symbol in one subframe of the frame structure corresponding to each service in the new protocol are aligned. Specific modifications or additions will not be repeated here.
  • a unicast service for example, there are four types of services: a unicast service, a multicast service, a narrowband MTC service, and a high frequency bandwidth service, where
  • the service feature is 15KHz subcarrier spacing, normal CP, then there are 14 symbols in 1ms, each symbol length is 1/14ms;
  • the service feature is 15KHz subcarrier spacing, extended CP, 1ms has 12 symbols, each symbol length is 1/12ms;
  • Narrowband MTC service service feature is 1.25KHz subcarrier spacing, extended CP, 1ms with 1 symbol, each symbol length 1ms;
  • the service feature is 3.75KHz subcarrier spacing, extended CP, 1ms has 3 symbols, each symbol length is 1/3ms;
  • the subframe length can be selected to be 2 ms, and the existing one subframe includes two slots. Compatible with the case of an even number of symbols.
  • whether the synchronization channel is shared may be determined only by determining whether the types of services transmitted in the same carrier are the same. If different types of services are different, different synchronization channels are allocated. If the types are the same, the synchronization channel is shared.
  • determining a frame structure of the service and a type of the service may also be combined to determine whether to share the synchronization channel.
  • the synchronization channel is shared.
  • the service type is different, it is determined whether the frame structure of the different service satisfies the condition of the shared synchronization channel. For the condition that the frame structure of different services satisfies the shared synchronization channel, refer to the foregoing description.
  • the first synchronization channel and the second synchronization channel are periodically transmitted.
  • the UE side can synchronize with the corresponding synchronization channel according to the service it receives. For example, when the service is the first service, it is synchronized with the first synchronization channel, and when it is the second service, the second synchronization channel is used. Synchronize. After the UE side and the wireless network side are out of synchronization, they only need to resynchronize with the corresponding synchronization channel according to the received service. In this way, the UE side may not receive the information of the entire carrier bandwidth, and only receives information on the sub-band corresponding to the received service.
  • the first synchronization channel is periodically sent, and the second synchronization channel is sent according to the synchronization request sent by the UE, as shown in FIG.
  • the second synchronization channel may be set to be transmitted within a time window.
  • the time window is opened, and when the time T set by the time window arrives, the time window is closed.
  • the time window is opened.
  • the time T set by the time window arrives, if the synchronization time is not reached, the UE sends the synchronization request again and triggers the time window to be turned on until the synchronization succeeds.
  • a synchronization request is sent to trigger the opening of the time window.
  • the UE side can perform synchronization through the first synchronization channel, and after the synchronization, the UE needs to receive other services.
  • the UE's upper layer knows what services it will receive later, and if there is no demand, it can synchronize according to the unicast service.
  • the base station After receiving the synchronization request, the base station sends a second synchronization channel corresponding to the service, such as sending the second synchronization channel in the sub-band where the service is located, or carrying the UE to receive other information in the previously sent first synchronization channel.
  • the synchronization information required by the service (which can also be considered as the second synchronization channel).
  • the service request sent by the UE may include information identifying the service, so that the base station determines which communication channel corresponding to the service is sent.
  • the search can be performed on the frequency band of the service, if there is synchronization of the service.
  • the signal is synchronized with the service. If there is no synchronization signal of the service in the service frequency band, it is first synchronized to the basic synchronization channel, such as the legacy synchronization channel, and then the synchronization request of the service is sent, and the base station is requested to send the synchronization channel of the service, thereby implementing synchronization.
  • the UE can achieve synchronization with different types of services while reducing the overhead of the synchronization channel.
  • the first synchronization channel is a legacy synchronization channel
  • the second synchronization channel is a synchronization channel corresponding to other services.
  • the compatibility of the UE that does not support the multi-service synchronization channel can be ensured, and the UE that does not support the multi-service synchronization channel still adopts the previous access mode.
  • the UE receives at least two synchronization channels sent by the base station, and according to its service frame structure, the service type or the terminal type, implements downlink time synchronization through the corresponding synchronization channel and synchronizes the frequency to the corresponding sub-band, for example, the synchronization channel is frequency division multiplexing.
  • the service type is the first type
  • the UE can implement downlink time synchronization through the first synchronization channel and synchronize the frequency to the first sub-band (sub-band 1).
  • the service type is In the second type
  • the UE can implement downlink time synchronization through the second synchronization channel and frequency synchronization to the second sub-band (sub-band 2).
  • the UE can perform transmission and reception of the service only in the corresponding synchronized sub-band.
  • the synchronization channel is in the time division multiplexing mode
  • the UE can implement downlink time synchronization through the first synchronization channel and synchronize the frequency to the first sub-band (sub-band 1)
  • the UE can implement downlink time synchronization through the second synchronization channel and frequency synchronization to the first sub-band (sub-band 1).
  • the UE determines what service to access, and then correlates with the synchronization channel sent by the base station according to the subcarrier spacing and sequence corresponding to the service, and then synchronizes to the corresponding sub-band.
  • the UE may scan on the entire carrier or in the sub-band of the service in the case of a sub-band of the known service.
  • the terminal type may correspond to a certain service characteristic.
  • the service is a narrowband MTC service
  • the terminal type determines the service characteristic.
  • the UE before the UE receives the second synchronization channel, the UE has implemented downlink time synchronization and frequency synchronization according to the first synchronization channel, and the UE may also be based on the service to be received by the UE.
  • the frame structure, the service type, or the terminal type sends a synchronization request to the base station to trigger the base station to send the second synchronization channel.
  • the UE may set a time period. If the time period is not synchronized, the request sending and the time period may be set again. If the synchronization is successful, the sending request is stopped.
  • the synchronization channel may be synchronized first.
  • the synchronization of the first synchronization channel can be implemented on the UE side.
  • the first synchronization channel is a legacy synchronization channel
  • the second synchronization channel is a synchronization channel corresponding to other types of services.
  • the UE may first synchronize a basic synchronization channel, and then send a synchronization request to the wireless network device according to the determined service frame structure, the service type or the terminal type, to trigger the wireless network device to deliver the second synchronization channel.
  • the UE can achieve synchronization with different services while reducing the overhead of the synchronization channel.
  • the UE may also, after synchronizing the legacy synchronization channel, if it wants to receive other services, may use a difference for time synchronization notified by the base station, such as offset of symbol synchronization, and/or a difference for frequency synchronization.
  • the value such as the offset of the center frequency of the corresponding frequency band of other services.
  • the notification of the base station may be completed by using RRC (radio resource control) signaling or physical layer signaling.
  • the notification of the base station may also be sent at the request of the UE.
  • the search may be performed directly on the sub-band of the service, and if the synchronization signal of the service exists, the synchronization signal of the service is synchronized. If there is no synchronization signal of the service in the sub-band of the service, the synchronization synchronization channel is first synchronized, then the synchronization request of the service is sent, and the eNB is requested to send the synchronization channel of the service, thereby implementing synchronization.
  • one base station eNB has three UEs, UE A, UE B, and UE C, where the current service of UE A is MTC service (ECP, 1.25 KHz), UE B The current service is multicast (ECP, 15 kHz).
  • MTC service ECP, 1.25 KHz
  • UE B The current service is multicast (ECP, 15 kHz).
  • NCP unicast service
  • NCP broadband service
  • FIG. 12 the case where one subframe length is 1 ms is taken as an example.
  • the eNB transmits four kinds of synchronization signals in one subframe in one carrier according to the current requirement, which are respectively four kinds of synchronization signals in FIG.
  • the four types of synchronization signals respectively correspond to four service frame structures: Narrowband subcarrier spacing 1.25KHz (narrowband MTC service); subcarrier spacing 15KHz, extended CP (multicast service); subcarrier spacing 15KHz, normal CP (unicast service); wideband subcarrier spacing 150KHz (broadband service). And at least one of the time-frequency position of the four synchronization signals, the resource mapping and the corresponding sequence is different.
  • different time-frequency positions may include different occupied bandwidths, or different relative positions of time domain resources (eg, different symbol intervals between the primary synchronization signal and the secondary synchronization signal).
  • a resource map can refer to a feature of a signal mapped to a subcarrier or symbol.
  • the design of the synchronization signal may also be different.
  • a certain synchronization signal may include only the primary synchronization signal, or only the secondary synchronization signal, or both the primary and secondary synchronization signals.
  • the UE A will blindly check the 20M carrier according to the current service MTC service, and determine the third synchronization signal in the carrier as the frequency band to be accessed according to the subcarrier spacing of 1.25 kHz and the corresponding sequence.
  • the UE knows in advance a plurality of synchronization sequences corresponding to the frame structure, determines whether the synchronization signal is the synchronization signal of the service through the sequence correlation, and knows that the bandwidth of the currently accessed frequency band is 1.4M through the broadcast signal, and then The business data is only transmitted on this 1.4M.
  • the UE can also obtain information such as a cell ID, a CP length, and the like through synchronization.
  • synchronization with the eNB can be achieved only by blindly checking the 1.4M frequency domain resources.
  • the UE B will blindly check the 20M carrier according to the current service multicast service, and determine the second synchronization signal in the carrier as the frequency band to be accessed according to the 15KHz and the corresponding sequence. Specifically, the UE will Knowing a plurality of synchronization sequences corresponding to the frame structure in advance, determining whether the synchronization signal is a synchronization signal of the service through sequence correlation, and knowing that the bandwidth of the currently accessed frequency band is 3M through the broadcast signal, and the next service data is only Transfer on this 3M. The UE can also obtain information such as a cell ID, a CP length, and the like through synchronization. When UE B is out of synchronization, synchronization with the eNB can be achieved only by blindly checking the 3M frequency domain resources.
  • the UE C blindly checks the 20M carrier according to the current service unicast service and the broadband service, and determines that the first synchronization signal in the carrier is the frequency band to be accessed according to the 15 kHz and the corresponding sequence. In addition, the remaining bandwidth portion is continuously detected, and the fourth synchronization signal in the carrier is also determined to be the frequency band to be accessed according to the 150 kHz and the corresponding sequence. Learn about the unicast industry through broadcast signals
  • the bandwidth of the access frequency band is 5M, and the next unicast service data is transmitted only on this 5M.
  • the bandwidth of the broadband service access frequency band is 10M, and the next broadband service data is transmitted only on this 10M.
  • the first 5M frequency domain resource can be blindly detected to synchronize with the eNB.
  • the last 10M frequency domain resources can be blindly checked to achieve synchronization with the eNB.
  • the second embodiment of the present invention provides a method for sending public information.
  • the method is described from the perspective of the sending side. As shown in FIG. 13, the method may include:
  • the first wireless network device sends at least two common information channels in the same carrier.
  • the at least two synchronization channels include a channel of the first common information and a channel of the second common information.
  • the first common information channel and the second common information channel are on different sub-bands of the same carrier.
  • the first wireless network device may be configured to determine that the service to be sent in the same carrier includes at least two services, where the at least two services may include the first service and the second service;
  • the first wireless network device determines that the first frame structure corresponding to the first service is different from the second frame structure corresponding to the second service; or, the types of the first service and the second service are different.
  • the channel of the first public information corresponds to the first service
  • the channel of the second public information corresponds to the second service.
  • the public information includes at least one of a synchronization signal, a broadcast message, and a system message.
  • the first service is a unicast service
  • the second service is a narrowband MTC service.
  • the second wireless network device can be configured to receive the public information required for the service transmission, and further receive and transmit the subsequent service data with the first wireless network device.
  • the second embodiment of the present invention further provides a method for sending public information, which is from the perspective of the transmitting side.
  • Description, as shown in FIG. 14, may include:
  • the first wireless network device sends a channel of the first public information in one carrier.
  • the first wireless network device receives a request sent by the second wireless network device, where the request carries an identifier of the service.
  • the first wireless network device sends a channel of the second common information in the foregoing carrier according to the service identifier, where a channel of the second public information corresponds to the service.
  • the public information includes at least one of a synchronization signal, a broadcast message, and a system message.
  • the first wireless network device transmits the service within the foregoing carrier.
  • the channel of the second common information corresponds to the service
  • the channel of the first common information is the basic common information channel, the configuration of the time-frequency resource or the codeword resource, etc., and other embodiments of the present invention may be referred to. The description will not be repeated here.
  • the channel of the second common information and the channel of the first common information may be independent, or may be common information required to increase corresponding service access in the channel of the first common information, such as a time domain offset.
  • One or more of the frequency domain offset or other information to obtain the channel of the second common information (optionally, the channel of the first common information also exists at this time).
  • the third embodiment of the present invention provides a method for transmitting public information, which is described from the perspective of the receiving side, and may include:
  • the second wireless network device performs reception of a channel of the public information according to characteristics of the service to be received.
  • the public information includes at least one of a synchronization signal, a broadcast message, and a system message.
  • the characteristics of the service include a frame structure of the service, or a type of the service, or a type of the second wireless network device (such as when the type of the wireless network device is related to the type of the service).
  • the second wireless network device may be a UE.
  • the relationship between the characteristics of the service and the frame structure of the channel of the common information, and the channel of the service and the common information on the first wireless network device side The relationship between the frame structures is consistent. In this way, it is ensured that the second wireless network device side completes the correct reception of the channel of the public information.
  • the receiving of the channel of the common information is related to the characteristics of the service, so that the second wireless network device can selectively perform the channel receiving the common information according to the characteristics of the service, for example, the frequency synchronization time is out of synchronization.
  • the frequency band corresponding to the characteristics of a certain service is synchronously accessed, so that the information of the other frequency bands can be not received, and the complexity of the second wireless network device can be reduced and the power can be saved.
  • S302 may be specifically:
  • the second wireless network device performs reception of the channel of the second common information according to the characteristics of the second service that is required to be received.
  • S302 may further include:
  • the second wireless network device performs reception of the channel of the first common information according to the characteristics of the first service that is required to be received.
  • the first service and the second service are transmitted on the same carrier.
  • the channel of the first public information and the channel of the second common information are also transmitted on the carrier where the first service and the second service are located.
  • the method may further include:
  • the second wireless network device sends a request for a channel of the public information to the first wireless network device according to characteristics of the service to be received.
  • the second wireless network device receives the channel of the first public information.
  • the channel of the public information in S302 is specifically a channel of the second common information.
  • the channel of the second public information corresponds to the characteristics of the second service.
  • the first common information channel is different from the structure of the second common information channel.
  • the channel corresponding to the service of the public information or the transmission timing of the channel of the public information, or the configuration of the resource, or the channel sharing of the common information of other services, reference may be made to other embodiments of the present invention. Description will not be repeated here.
  • the channel of the second common information and the channel of the first common information may be independent, or may be common information required to increase corresponding service access in the channel of the first common information, such as a time domain offset.
  • One or more of the frequency domain offset or other information to obtain the channel of the second common information (optionally, the channel of the first common information also exists at this time).
  • a fourth embodiment of the present invention provides a communication system, as shown in FIG. 15, including the foregoing first wireless network device 1501 and the foregoing second wireless network device 1502.
  • the first wireless network device is a base station, and the second wireless network device is a terminal; in another scenario, the first wireless network device is a macro base station, and the second wireless network device is a micro base station, such as access Point AP; In still another scenario, the first wireless network device is the first terminal, and the second wireless network device is the second terminal.
  • the first wireless network device may include a transceiver unit 15011 and a processing unit 15012.
  • the wireless network device can be a base station or a terminal.
  • the processing unit 15012 is configured to send, by using the transceiver unit 15011, a channel of at least two common information in a same carrier, where the at least two synchronization channels include a channel of the first common information and a second common The channel of information.
  • the channel of the first common information and the channel of the second common information are on different sub-bands.
  • processing unit 15012 is further configured to: determine that the service to be sent in the same carrier includes at least two services, where the at least two services may include the first service and the second service; a channel of the common information, the second service corresponding to the channel of the second common information.
  • the public information includes at least one of a synchronization signal, a broadcast message, and a system message.
  • the second wireless network device can be configured to receive the public information required for the service transmission, and further perform the subsequent service with the first wireless network device. Receive and send data.
  • the transceiver unit 15011 is configured to send a channel of the first public information in one carrier, and is further configured to receive a request sent by the second wireless network device, where the request carries an identifier of the service;
  • the processing unit 15012 is configured to use the transceiver unit 15011 to send, according to the service identifier, a channel of the second common information in the foregoing carrier, where a channel of the second common information corresponds to the service.
  • transceiver unit 15011 is further configured to transmit the service within the foregoing carrier.
  • the specific description or processing unit and the function of the transceiver unit such as the channel corresponding to the service of the second common information, the channel of the first common information is the base channel, the configuration of the time-frequency resource or the codeword resource, etc. References to the description of the first wireless network device or the base station in other embodiments of the present invention are not described herein.
  • the function of the transceiver unit can be implemented by a dedicated chip through a transceiver circuit or a transceiver.
  • the processing unit can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.
  • a wireless access device provided by an embodiment of the present invention may be implemented by using a general-purpose computer.
  • the program code that is to implement the functions of the transceiver unit and the processing unit is stored in a memory, and the processor implements the functions of the transceiver unit and the processing unit by executing code in the memory.
  • the first wireless network device may further include a common part such as a memory and/or a bus, and details are not described herein.
  • the second wireless network device includes a transceiver unit 15021 and a processing unit 15022.
  • the wireless network device can be a terminal or a base station.
  • the processing unit 15022 is configured to perform, by using the transceiver unit 15021, the channel of the public information according to the characteristics of the service to be received.
  • the processing unit may be specifically configured to perform, by using the transceiver unit, the channel of the second common information according to the characteristic of the second service that is required to be received.
  • the processing unit may be further configured to perform, by using the transceiver unit, according to characteristics of the first service that is required to be received.
  • the first service and the second service are transmitted on the same carrier.
  • the channel of the first public information and the channel of the second common information are also transmitted on the carrier where the first service and the second service are located.
  • the processing unit may be further configured to use the transceiver unit to send a request for the channel of the public information to the first wireless network device according to the characteristics of the service to be received.
  • the processing unit may be further configured to receive the channel of the first common information by using the transceiver unit.
  • the channel of the public information is specifically a channel of the second common information.
  • the channel of the second public information corresponds to the characteristics of the second service.
  • the channel of the first common information is different from the frame structure of the channel of the second common information.
  • Related definitions, disclosures, and detailed descriptions such as the function of the transceiver unit or processing unit, the channel corresponding to the service of the public information, or the timing of the transmission of the channel of the public information, or the configuration of the resource, or the public information of other services.
  • the second wireless network device or the UE in other embodiments of the present invention, and the details are not described herein.
  • the channel of the second common information and the channel of the first common information may be independent, or may be common information required to increase corresponding service access in the channel of the first common information, such as a time domain offset.
  • One or more of the frequency domain offset or other information to obtain the channel of the second common information (optionally, the channel of the first common information also exists at this time).
  • the function of the transceiver unit can be implemented by a dedicated chip through a transceiver circuit or a transceiver.
  • the processing unit can be implemented by a dedicated processing chip, a processing circuit, a processor, or a general purpose chip.
  • a wireless access device provided by an embodiment of the present invention may be implemented by using a general-purpose computer.
  • the program code that is to implement the functions of the transceiver unit and the processing unit is stored in a memory, and the processor implements the functions of the transceiver unit and the processing unit by executing code in the memory.
  • the second wireless network device may further include a common part such as a memory and/or a bus, and details are not described herein.
  • At least one or more of A, B and C herein includes A, or, B, or C, or A and B, or A and C, or B. And C, or, A and B and C.
  • at least one (or) or a plurality of (A), A, B, C, and D, or at least one or more of A, B, and D may be inferred. The meaning of at least one of the plurality of items is not described here.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本发明实施例提供一种数据传输的方法、无线网络设备和通信系统。其中方法包括第一无线网络设备在同一个载波内发送至少两个公共信息信道，所述至少两个公共信息信道包括第一公共信息信道和第二公共信息信道，所述第一公共信息信道和所述第二公共信息信道在所述同一个载波的不同子频段上，所述公共信息包括同步信号、广播信号和系统消息中的至少一种。这样，可以使得载波利用率较高的业务传输的场景也可以有效的进行公共信息的传输。

Description

一种数据传输的方法、无线网络设备和通信系统 技术领域
本发明涉及通信技术领域，特别是涉及一种数据传输的方法、无线网络设备和通信系统。
背景技术
随着无线通信需求的发展，网络服务会面临各种类型的业务，如基于互联网协议(internet protocol,IP)的语音传输(voice over IP，VoIP)业务，高清视频传输业务，高覆盖低数据量的机器类型通信(machine type communication，MTC)业务，时延敏感业务，增强型多媒体广播多播(enhanced multimedia broadcost/multicast service,eMBMS)业务以及设备间通信(device to device，D2D)传输业务等。
当前通常的方案是将各种业务在不同的载波上或者在同一载波的不同子帧发送，对载波的利用率较低。亟需一种提高载波利用率的业务传输的方案以及相应的公共信息传输的方案。
发明内容
本发明实施例提供一种用于无线通信的帧结构，一种数据传输的方法、装置和通信系统，适用于载波利用率较高的业务传输的场景。其中，载波利用率较高的业务传输的场景可以包括在同一个载波的不同子频段上传输不同的业务。
第一方面，本发明实施例提供一种用于无线通信的帧结构，包括：
在同一个载波包含至少两个公共信息信道，所述至少两个公共信息信道包括第一公共信息信道和第二公共信息信道，所述第一公共信息信道和所述第二公共信息信道在所述同一个载波的不同子频段上。
结合第一方面，在第一种可能的实施方式中，所述公共信息包括同步信号、广播信号和系统消息中的至少一种。
结合第一方面或第一方面的第一种可能的实施方式，在第一方面的第二种可能的实施方式中，第一公共信息信道具有第一子载波间隔和第一循环前缀长度，第二公共信息信道具有第二子载波间隔和第二循环前缀长度，所述第一子载波间隔和所述第二子载波间隔不同且所述第一循环前缀长度和所述第二循环前缀长度不同。
结合第一方面，或，第一方面的第一种可能的实施方式，在第一方面的第三种可能的实施方式中，第一公共信息信道具有第一子载波间隔和第一循环前缀长度，第二公共信息信道具有第二子载波间隔和第二循环前缀长度，所述第一子载波间隔和所述第二子载波间隔相同且所述第一循环前缀长度和所述第二循环前缀长度不同。
结合第一方面，或，第一方面的第一种至第三种中任意一种可能的实施方式，在第一方面的第四种可能的实施方式中，所述第一公共信息信道和所述第二公共信息信道在所述不同子频段上的中间资源块上。
结合第一方面，或，第一方面的第一种至第四种中任意一种可能的实施方式，在第一方面的第五种可能的实施方式中，在所述同一个载波包含至少两个业务信道，所述至少两个业务信道包括第一业务信道和第二业务信道，所述第一业务具有第一业务特性，所述第二业务具有第二业务特性，第一业务特性包括第一业务的帧结构或第一业务类型，第二业务特性包括第二业务的帧结构或第二业务类型；
所述第一业务信道对应于所述第一公共信息信道，所述第二业务信道对应于所述第二公共信息信道。
结合第一方面的第五种可能的实施方式，在第一方面的第六种可能的实施方式中，所述第一业务的帧结构包括第一业务子载波间隔、第一业务循环前缀长度和第一业务所在的子频段；
所述第一业务信道对应于所述第一公共信息信道包括：
(1)所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度相同；或者，所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度不同；和，
(2)所述第一业务所在的子频段与所述第一公共信息信道所在的子频段相同。
结合第一方面的第五种或第六种可能的实施方式，在第一方面的第七种可能的实施方式中，第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的子频段；
所述第二业务信道对应于所述第二公共信息信道包括：
(1)所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度相同；或者，所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度不同；和，
(2)所述第二业务所在的子频段与所述第二公共信息信道所在的子频段相同。
结合第一方面的第五种至第七种中任意一种可能的实施方式，在第一方面的第八种可能的实施方式中，所述至少两个业务信道还包括第三业务信道，所述第三业务具有第三业务特性，所述所述第三业务特性包括第三业务帧结构或第三业务类型；所述第二公共信息信道也对应于第三业务特性。
结合第一方面的第八种可能的实施方式，在第一方面的第九种可能的实施方式中，
所述第三业务的帧结构包括第三业务子载波间隔、第三业务循环前缀长度和第三业务所在的子频段；所述第三业务所在的子频段与所述第二公共信息信道所在的子频段不同；
所述第二公共信息信道也对应于第三业务信道包括：
所述第三业务子载波间隔和所述第二子载波间隔相同，且所述第三业务CP长度和所述第二CP长度相同；或者，所述第三业务子载波间隔和所述第二子载波间隔相同，且所述第三业务CP长度和所述第二CP长度不同。
第二方面，本发明实施例提供一种数据传输的方法，无线网络设备根据所述第一方面，或，第一方面的第一种至第九种中任意一种可能的实施方式中所述的帧结构进行数据的发送和/或接收，所述数据包括公共信息和/或业务。
第三方面，本发明实施例提供一种无线网络设备，包括收发单元和处理单元，所述处理单元执行第二方面提供的所述方法，并在执行的过程中，利用所述收发单元进行数据的发送和/或接收。
结合第三方面，在第三方面的第一种可能的实施方式中，所述无线网络设备为基站，或，终端。
第四方面，本发明实施例提供一种数据传输的方法，包括：
第一无线网络设备在同一个载波内发送至少两个公共信息信道，所述至少两个公共信息信道包括第一公共信息信道和第二公共信息信道，所述第一公共信息信道和所述第二公共信息信道在所述同一个载波的不同子频段上。
结合第四方面，在第四方面的第一种可能的实施方式中，所述第一公共信息信道对应第一业务，所述第二公共信息信道对应第二业务。
结合第四方面的第一种可能的实施方式，在第四方面的第二种可能的实施方式中，在发送至少两个公共信息信道之前，还包括：
第一无线网络设备确定在所述同一个载波内所需传输的业务包括至少两个业务，所述至少两个业务包括所述第一业务和所述第二业务，其中，第一业务的帧结构包括第一业务子载波间隔、第一业务循环前缀长度和第一业务所在的子频段；第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的子频段。
结合第四方面，或，第四方面的第一种或第二种可能的实施方式，在第四方面的第三种可能的实施方式中，所述公共信息包括同步信号、广播信号和系统消息中的至少一种。
结合第四方面的第一种至第三种可能的实施方式，在第四方面的第四种可能的实施方式中，所述第一业务和第二业务的帧结构不同；
或者，第一业务和第二业务的类型不同。
结合第四方面的第四种可能的实施方式，在第四方面的第五种可能的实施方式中，所述第一业务和第二业务的帧结构不同包括：第一业务所在的子频段和第二业务所在的子频段不同。
结合第四方面的第五种可能的实施方式，在第四方面的第六种可能的实施方式中，所述第一业务和第二业务的帧结构不同包括：第一业务子载波间隔和第二业务子载波间隔不同且第一业务CP长度和第二业务CP长度不同；或者，第一业务子载波间隔和第二业务子载波间隔相同且第一业务CP长度和第二业务CP长度不同。
结合第四方面的第一种至第六种中任意一种可能的实施方式，在第四方面的第七种可能的实施方式中，第一公共信息信道的结构包括第一子载波间隔、第一循环前缀长度、第一时域资源和第一频域资源；
所述第一公共信息信道对应第一业务包括：
(1)所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度相同；或者，所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度不同；和，
(2)所述第一业务子频段和第一子频段相同。
结合第四方面的第一种至第六种中任意一种可能的实施方式，在第四方面的第八种可能的实施方式中，第一公共信息信道的结构包括第一子载波间隔、第一循环前缀长度和第一公共信息信道所在的第一子频段；
所述第一公共信息信道对应第一业务包括：
(1)所述第一业务子频段和第一子频段不同；且，
(2)所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度相同；或，所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度不同。
可选的，所述第一公共信息包含所述第一业务子频段的信息。
结合第四方面的第一种至第八种中任意一种可能的实施方式，在第四方面 的第九种可能的实施方式中，第二公共信息信道的结构包括第二子载波间隔、第二循环前缀长度和第二公共信息信道所在的第二子频段；
所述第二公共信息信道对应第二业务包括：
(1)所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度相同；或者，所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度不同；和，
(2)所述第二业务子频段和第二子频段相同。
结合第四方面的第一种至第八种中任意一种可能的实施方式，在第四方面的第十种可能的实施方式中，第二公共信息信道的结构包括第二子载波间隔、第二循环前缀长度和第二公共信息信道所在的第二子频段；
所述第二公共信息信道对应第二业务包括：
(1)所述第二业务子频段和第二子频段不同；和，
(2)所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度相同；或者，所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度不同。
可选的，所述第二公共信息包含所述第二业务子频段的信息。
结合第四方面的第十种可能的实施方式，在第四方面的第十一种可能的实施方式中，所述至少两个业务还包括第三业务，所述第二公共信息信道还对应所述第三业务，
所述第三业务的类型与所述第二业务的类型相同，或者，
第三业务的帧结构包括第三业务子载波间隔、第三业务循环前缀长度和第三业务所在的第三业务子频段；第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的子频段；
(1)所述第三业务子频段和所述第二业务子频段不同；且
(2)所述第三业务子载波间隔和所述第二业务子载波间隔相同且第三CP长度和第二CP长度相同，或者，所述第三业务子载波间隔和所述第二业务子载波间隔相同且第三CP长度和第二CP长度不同且第三业务帧结构中一个子帧的 最后一个符号和第二业务帧结构中一个子帧的最后一个符号的时域边界对齐。
结合第四方面的第十一种可能的实施方式，在第四方面的第十二种可能的实施方式中，所述第二公共信息信道还对应所述第三业务包括：
所述第二公共信息包含所述第三业务子频段的信息。
结合第四方面，或，第四方面的第一种至第十二种中任意一种可能的实施方式，在第四方面的第十三种可能的实施方式中，该方法还包括：
第一无线网络设备接收第二无线网络设备所发送的第二公共信息信道请求，
第一无线网络设备基于所述第二公共信息信道请求发送所述第二公共信息信道。
结合第四方面的第十三种可能的实施方式，在第四方面的第十四种可能的实施方式中，所述第二公共信息信道请求用于触发所述第二公共信息信道在一个时间窗内发送。
结合第四方面的第十三种或第十四种可能的实施方式，在第四方面的第十五种可能的实施方式中，所述第二公共信息信道请求包括所述第二业务的标识。
结合第四方面的第十三种至第十五种中任意一种可能的实施方式，在第四方面的第十六种可能的实施方式中，所述第一无线网络设备在接收所述第二公共信息信道请求之前，还在所述同一个载波上发送第四公共信息信道，所述第四公共信息信道为基础公共信息信道，且所述第四公共信息信道的结构和所述第二公共信息信道的结构不同。
结合第四方面的第十六种可能的实施方式，在第四方面的第十七种可能的实施方式中，
所述第四公共信息信道的结构包括第四子载波间隔、第四循环前缀长度和第四公共信息信道所在的第四子频段；第二公共信息信道的结构包括第二子载波间隔、第二循环前缀长度和第二公共信息信道所在的第二子频段；
第四公共信息信道的结构和第二公共信息信道的结构不同包括：
(1)第四子载波间隔和第二子载波间隔不同且第一CP长度和第二CP长度 不同；或者，第四子载波间隔和第二子载波间隔相同且第一CP长度和第二CP长度不同；
且
(2)第四子频段和第二子频段不同。
第五方面，本发明实施例提供一种无线网络设备，包括收发单元和处理单元，所述处理单元用于执行第四方面，或，第四方面的第一种至第十七种中任意一种可能的实施方式中提供的所述的方法，所述收发单元在所述处理单元的控制下进行数据的接收和/或发送。
第五方面的第一种可能的实施方式中，所述无线网络设备为基站。
第六方面，本发明实施例提供一种数据传输的方法，包括：
第二无线网络设备根据所需接收的第二业务的特性进行第二公共信息信道的接收，其中，所述第二公共信息信道对应于第二业务；
所述第二业务的特性包括第二业务的帧结构，或，第二业务的类型，或，第二无线网络设备的类型。
结合第六方面，在第六方面的第一种可能的实施方式中，所述第二公共信息信道对应于第二业务包括：
第二公共信息信道对应于第二业务的帧结构，或，第二业务的类型，或，第二无线网络设备的类型。
结合第六方面的第一种可能的实施方式，在第六方面的第二种可能的实施方式中，第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的第二业务子频段；第二公共信息信道的结构包括第二子载波间隔、第二循环前缀长度和第二公共信息信道所在的第二子频段；
所述第二公共信息信道对应于第二业务的帧结构包括：
(1)第二业务子频段和第二子频段相同；且
(2)所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度相同；或者，所述第二业务子载波间隔和所述第二 子载波间隔相同，且所述第二业务CP长度和所述第二CP长度不同；
或者，
(1)第二业务子频段和第二子频段不同，且
(2)所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度相同；或者，所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度不同。
结合第六方面，或，第六方面的第一种或第二种可能的实施方式，在第六方面的第三种可能的实施方式中，所述公共信息包括同步信号、广播信号和系统消息中的至少一种。
结合第六方面，或，第六方面的第一种至第三种中任意一种可能的实施方式，该方法还包括：
第二无线网络设备根据所需接收的第三业务的特性进行第三公共信息信道的接收，第三公共信息信道对应于第三业务；所述第三业务和第二业务在同一个载波上传输，第三公共信息信道和第二公共信息信道也在第三业务和第二业务所在的载波上传输。
结合第六方面的第四种可能的实施方式，在第六方面的第五种可能的实施方式中，所述第三业务的特性和第二业务的特性不同，具体包括：
第三业务的帧结构和第二业务的帧结构不同；或，
第三业务的类型和第二业务的类型不同。
结合第六方面的第五种可能的实施方式，在第六方面的第六种可能的实施方式中，第三业务的帧结构包括第三业务子载波间隔、第三业务循环前缀长度和第三业务所在的第三业务子频段；第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的第二业务子频段；
第三业务的帧结构和第二业务的帧结构不同包括：
(1)第三业务子频段和第二业务子频段不同；且
(2)第三业务子载波间隔和第二业务子载波间隔不同且第三业务CP长度和第二业务CP长度不同；或者，第三业务子载波间隔和第二业务子载波间隔相同 且第三业务CP长度和第二业务CP长度不同。
结合第六方面，第六方面的第一种至第六种中任意一种可能的实施方式，在第六方面的第七种可能的实施方式中，该方法还包括：
第二无线网络设备根据所需接收的第二业务的特性向第一无线网络设备发送第二公共信息信道的请求，所述第二公共信息信道基于所述请求下发。
结合第六方面的第七种可能的实施方式，在第六方面的第八种可能的实施方式中，所述第二公共信息信道请求用于触发所述第二公共信息信道在一个时间窗内发送。
结合第六方面的第七种或第八种可能的实施方式，在第六方面的第九种可能的实施方式中，所述第二公共信息信道请求包括所述第二业务的标识。
结合第六方面的第七种至第九种中任意一种可能的实施方式，在第六方面的第十种可能的实施方式中，所述进行第二公共信息信道的接收之前，还包括：
第二无线网络设备接收第一公共信息信道，第一公共信息信道和第二公共信息信道在同一个载波上传输，第一公共信息信道为基础公共信息信道，且第一公共信息信道的结构和第二公共信息信道的结构不同。
结合第六方面的第十种可能的实施方式，在第六方面的第十一种可能的实施方式中，第一公共信息信道的结构包括第一子载波间隔、第一循环前缀长度和第一公共信息信道所在的第一子频段；第二公共信息信道的结构包括第二子载波间隔、第二循环前缀长度和第二公共信息信道所在的第二子频段；
第一公共信息信道的结构和第二公共信息信道的结构不同包括：
(1)第一子载波间隔和第二子载波间隔不同且第一CP长度和第二CP长度不同；或者，第一子载波间隔和第二子载波间隔相同且第一CP长度和第二CP长度不同；
和，
(2)第一子频段和第二子频段不同。
结合第六方面，或，第六方面的第一种至第十一种中任意一种可能的实施方式，在第六方面的第十二种可能的实施方式中，该方法还包括：
第二无线网络设备根据所需接收的第四业务的特性进行第二公共信息信道的接收，第二公共信息信道还对应第四业务；所述第四业务的特性包括第四业务的帧结构，或，第四业务的类型；
第四业务的类型和第二业务的类型相同；或者，
第四业务的帧结构包括第四业务子载波间隔、第四业务循环前缀长度和第四业务所在的第四业务子频段；第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的第二业务子频段；
(1)第四业务子载波间隔和第二业务子载波间隔相同且第四CP长度和第二CP长度相同，或，
(2)第四业务子载波间隔和第二业务子载波间隔相同且第四CP长度和第二CP长度不同且所述第四业务的帧结构中的一个子帧中的最后一个符号和所述第二业务的帧结构中的一个子帧中的最后一个符号的时域边界对齐。
结合第六方面的第十二种可能的实施方式，在第六方面的第十三种可能的实施方式中，第二公共信息信道的结构包括第二子载波间隔、第二循环前缀长度和第二公共信息信道所在的第二子频段；所述第二公共信息信道还对应所述第四业务包括：
(1)所述第四业务子载波间隔和所述第二子载波间隔相同，且所述第四业务CP长度和所述第二CP长度相同；或者，所述第四业务子载波间隔和所述第二子载波间隔相同，且所述第四业务CP长度和所述第二CP长度不同；和，
(2)所述第二子频段和第四业务子频段不同。
可选的，所述第二公共信息包含所述第四业务子频段的信息。
第七方面，本发明实施例提供一种无线网络设备，包括收发单元和处理单元；
所述处理单元用于执行第六方面，或，第六方面的第一种至第十三种中任意一种可能的实施方式中所提供的所述方法，所述收发单元在所述处理单元的控制下进行数据的接收和/或发送。
第七方面的第一种可能的实施方式中，所述无线网络设备为终端。
第八方面，本发明实施例提供一种通信系统，包括如第五方面或第五方面任意一种可能的实施方式中所提供的所述无线网络设备和如第七方面或第七方面任意一种可能的实施方式中所提供的所述无线网络设备。
本发明实施例提供的用于无线通信的帧结构，数据传输的方法、装置和通信系统，通过在同一个载波上的不同子频段上传输不同的公共信息信道，从而实现在同一个载波传输多个业务的场景下公共信息的有效传输。
为了便于理解，示例性的给出了与部分与本发明相关概念的说明以供参考。如下所示：
第三代合作伙伴计划(3rd generation partnership project，3GPP)是一个致力于发展无线通信网络的项目。通常，将3GPP相关的机构称为3GPP机构。
无线通信网络，是一种提供无线通信功能的网络。无线通信网络可以采用不同的通信技术，例如码分多址(code division multiple access,CDMA)、宽带码分多址(wideband code division multiple access，WCDMA)、时分多址(time division multiple access，TDMA)、频分多址(frequency division multiple access,FDMA)、正交频分多址(orthogonal frequency-division multiple access,OFDMA)、单载波频分多址(single Carrier FDMA，SC-FDMA)、载波侦听多路访问/冲突避免(carrier sense multiple access with collision avoidance)。根据不同网络的容量、速率、时延等因素可以将网络分为2G(generation)网络、3G网络或者4G网络。典型的2G网络包括全球移动通信系统(global system for mobile communications/general packet radio service，GSM)网络或者通用分组无线业务(general packet radio service，GPRS)网络，典型的3G网络包括通用移动通信系统(universal mobile telecommunications system，UMTS)网络，典型的4G网络包括长期演进(long term evolution,LTE)网络。其中，UMTS网络有时也可以称为通用陆地无线接入网(universal terrestrial radio access network，UTRAN)，LTE网络有时也可以称为演进型通用陆地无线接入网(evolved universal terrestrial radio access network，E-UTRAN)。根据资源分配方式的不同，可以分为蜂窝通信网络和无线局域网络(wireless local area networks，WLAN)，其中， 蜂窝通信网络为调度主导，WLAN为竞争主导。前述的2G、3G和4G网络，均为蜂窝通信网络。本领域技术人员应知，随着技术的发展本发明实施例提供的技术方案同样可以应用于其他的无线通信网络，例如4.5G或者5G网络，或其他非蜂窝通信网络。为了简洁，本发明实施例有时会将无线通信网络简称为网络。
蜂窝通信网络是无线通信网络的一种，其采用蜂窝无线组网方式，在终端设备和网络设备之间通过无线通道连接起来，进而实现用户在活动中可相互通信。其主要特征是终端的移动性，并具有越区切换和跨本地网自动漫游功能。
无线网络设备，是指在无线通信网络中的设备，其可以是终端，如用户设备，也可以是网络侧设备，如基站，网络控制器或移动交换中心等。其中，终端可以跟网络侧设备进行通信，也可以跟另一终端进行通信，如D2D(device to device)或M2M(machine to machine)场景下的通信，网络侧设备可以跟终端通信，也可以跟另一网络侧设备通信，如宏基站和接入点之间的通信。
用户设备(user equipment，UE)是一种终端设备，可以是可移动的终端设备，也可以是不可移动的终端设备。该设备主要用于接收或者发送业务数据。用户设备可分布于网络中，在不同的网络中用户设备有不同的名称，例如：终端，移动台，用户单元，站台，蜂窝电话，个人数字助理，无线调制解调器，无线通信设备，手持设备，膝上型电脑，无绳电话，无线本地环路台等。该用户设备可以经无线接入网(radio access network，RAN)(无线通信网络的接入部分)与一个或多个核心网进行通信，例如与无线接入网交换语音和/或数据。
基站(base station，BS)设备，也可称为基站，是一种部署在无线接入网用以提供无线通信功能的装置。例如在2G网络中提供基站功能的设备包括基地无线收发站(base transceiver station,BTS)和基站控制器(base station controller,BSC)，3G网络中提供基站功能的设备包括节点B(NodeB)和无线网络控制器(radio network controller,RNC)，在4G网络中提供基站功能的设备包括演进的节点B(evolved NodeB，eNB)，在WLAN中，提供基站功能的设备为接入点(access point，AP)。
网络协议(Internet Protocol，IP)，是为计算机网络相互连接进行通信而设计的协议。在因特网中，它是能使连接到网上的所有计算机网络实现相互通信的一套规则，规定了计算机在因特网上进行通信是应当遵守的规则。
无线局域网络(wireless local area networks，WLAN)，是指采用无线电波作为数据传送媒介的局域网，传送距离一般只有几十米。
接入点(access point，AP)，连接无线网络，亦可以连接有线网络的设备。它能当作中介点，使得有线与无线上网的设备互相连接、传输数据。
系统信息广播(system information broadcast)：可以简称为系统信息，主要提供了所接入网络的主要信息，以便与UE建立无线连接，使得UE获得足够的接入信息，小区选择、重选的公共配置参数。LTE中的系统消息分为多个系统消息块(system information block，SIB)，其中一个块叫做主广播块(master information block，MIB)，该MIB也称为广播信号，其他SIB称为系统消息。LTE系统信息广播与3G的系统信息广播从功能上是完全一致的，但是在调度和具体的信息内容上还是有很大的不同。其中MIB通常包括有限个最重要，最常用的传输参数，其他SIB则通常包括小区无线配置、小区重选信息、邻区列表、家庭基站标识(home eNB identifier)，地震海啸预警(ETWS)或公共报警(CMAS)等通知信息，多媒体多播(MBMS)控制信息等参数。
时序：时间的先后顺序
同步信号：用于接收方实现与发送方频率同步和时间同步中至少一项的信号。
接入：无线网络设备之间建立初始连接的过程。具体无线网络设备为何设备可以不限。常用于UE和基站之间，微基站和宏基站之间。在本发明实施例中也应用于UE和UE之间。
帧结构，无线帧，子帧，时隙，符号：
帧结构是对信号传输的时间资源(时域)进行划分所展现的结构，在无线通信中，通常所用的帧结构中的时间单位从大到小依次有无线帧，子帧和时隙。具体的每个时间单位对应的时间长度可以根据具体的协议要求而制定。以LTE 中的一种帧结构为例：一个无线帧(radio frame)长度为10ms，包含10个子帧(subframe)，每个子帧长度为1ms，每个子帧进一步包含两个时隙，每个时隙(slot)0.5ms。符号(symbol)是信号时域上的最小单位。以LTE网络为例，如图11所示，每个OFDM子载波对应一个OFDM符号。不考虑符号间的保护间隔时，一个OFDM符号长度(所占的时间)为1/子载波间隔。考虑符号间的保护间隔时，一个OFDM符号所占的时间为OFDM符号长度与循环前缀(CP)长度之和。
循环前缀(CP)
在OFDM系统中，为了最大限度地消除符号间干扰，在每个OFDM符号之间要插入保护间隔，该保护间隔长度Tg一般要大于无线信道的最大时延扩展，这样一个符号的多径分量就不会对下一个符号造成干扰。
在这段保护间隔内，可以不插入任何信号，即保护间隔是一段空闲的传输时段。然而在这种情况中，由于多径传播的影响，会产生信道间干扰，即子载波之间的正交性遭到破坏，使不同的子载波之间产生干扰。为了消除由于多径传播造成的信道间干扰，将原来宽度为T的OFDM符号进行周期扩展，用扩展信号来填充保护间隔。
帧号：每个无线帧的编号，以LTE网络为例，LTE中帧的编号是从0-1023，然后再重新从0开始编号。
资源：包括时间资源、频域资源、码资源和空间资源中的至少一项
时间资源：信号所占用的资源以时间为度量的资源，例如信号在时间上占用2个OFDM符号，或者1个子帧，或者3个无线帧。时间资源可以包括绝对的时间资源和相对的时间资源，相对的时间资源可以为但不限于无线帧号、子帧在无线帧中的相对位置和符号在子帧中的相对位置中的至少一种。通常描述时间资源为固定的或可变的，都是针对相对的时间资源来描述的。通常描述时间资源为相同的，则可以是绝对的时间资源相同，也可以是相对的时间资源相同。
频域资源：信号所占用的资源以频率为度量的资源，例如信号在频率上占 用10MHz，在OFDM系统中，通常采用子载波个数来描述所占用的频域资源。
时频资源：信号所占用的资源以时间和频率为度量的资源，例如信号在时间上占用2个OFDM符号，频率上占用10MHz。
码资源：信号所占用的资源以码为度量的资源，例如WCDMA中的扩频码，或者信号采用的序列资源也称为码资源。例如同步信号采用的序列。
序列：码资源的一种。
空间资源：信号所占用的资源以波束为度量的资源，对于多输入多输出(multiple input multiple output，MIMO)传输，信号采用不同方向的波束可以在相同的时频资源上并行传输。
业务的帧结构：包括传输业务数据时所采用的子载波间隔，CP长度，以及业务所占频域资源和时域资源。在FDD系统中，业务的帧结构至少包括传输业务数据时所采用的子载波间隔，CP长度和业务所在的子频段。
信道的结构：包括传输信道时所用的子载波间隔，CP长度，时域资源和频域资源。在FDD系统中，信道的结构至少包括传输信道时所用的子载波间隔，CP长度和信道所在的子频段。
基础公共信息的信道：可以是系统或者协议预先定义的一种公共信息信道类型，如LTE中的legacy同步信道；或者预先定义一种业务类型，其对应的公共信息信道为基础公共信息信道。
载波：由频谱上一段连续的频域资源组成，该载波的带宽为系统带宽。比如，当前LTE可以支持的系统带宽为1.4MHz，3MHz，5MHz，10MHz，15MHz和20MHz。
子频段：将上述载波上的资源再划分，每一段划分得到的连续的频域资源称为该载波的子频段。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，下面描述中的附图仅仅是本发明的 一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的一种OFDM系统中资源格的结构示意图；
图2为本发明实施例提供的基站向多个UE发送不同的业务数据的示意图；
图3为本发明实施例提供的四种常见的业务对应的帧结构的示意图；
图4为本发明实施例提供的FDD下同一个载波传输多个业务及多个业务对应的同步信道的帧结构示意图；
图5为本发明实施例提供的TDD下同一个载波传输多个业务及多个业务对应的同步信道的帧结构示意图；
图6为本发明实施例提供的单播业务的同步信号的时域位置示意图；
图7为本发明实施例提供的单播业务的同步信号的频域位置示意图；
图8为本发明实施例提供的7.5KHz专用广播多播业务的同步信号的时域位置示意图；
图9为本发明实施例提供的7.5KHz专用广播多播业务的同步信号的频域位置示意图；
图10为本发明实施例提供的特定业务同步信道SCH的触发流程示意图；
图11为本发明实施例提供的一个基站下有3个UE的示意图；
图12为本发明实施例提供的图11场景下基站发送的四个同步信号及四个业务的帧结构示意图；
图13为本发明实施例一提供的公共信息的发送方法的流程示意图；
图14为本发明实施例二提供的公共信息的发送方法的流程示意图；
图15为本发明实施例四提供的通信系统的结构示意图；
图16为本发明实施例提供的LTE网络帧结构的示意图。
具体实施方式
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、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是 全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有付出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如本申请所使用的，术语“组件”、“模块”、“系统”等等旨在指代计算机相关实体，该计算机相关实体可以是硬件、固件、硬件和软件的结合、软件或者运行中的软件。例如，组件可以是，但不限于是：在处理器上运行的处理、处理器、对象、可执行文件、执行中的线程、程序和/或计算机。作为示例，在计算设备上运行的应用和该计算设备都可以是组件。一个或多个组件可以存在于执行中的过程和/或线程中，并且组件可以位于一个计算机中以及/或者分布在两个或更多个计算机之间。此外，这些组件能够从在其上具有各种数据结构的各种计算机可读介质中执行。这些组件可以通过诸如根据具有一个或多个数据分组(例如，来自一个组件的数据，该组件与本地系统、分布式系统中的另一个组件进行交互和/或以信号的方式通过诸如互联网之类的网络与其它系统进行交互)的信号，以本地和/或远程过程的方式进行通信。
本申请结合无线网络设备来描述各个方面，该无线网络设备可以为基站，也可以为终端，例如用户设备。其中，用户设备还可以称为用户终端，并且可以包括系统、用户单元、用户站、移动站、移动无线终端、移动设备、节点、设备、远程站、远程终端、终端、无线通信设备、无线通信装置或用户代理的功能中的一些或者所有功能。用户设备可以是蜂窝电话、无绳电话、会话发起协议(SIP)电话、智能电话、无线本地环路(WLL)站、个人数字助理(PDA)、膝上型计算机、手持式通信设备、手持式计算设备、卫星无线设备、无线调制解调器卡和/或用于在无线系统上进行通信的其它处理设备。基站还可以称为接入点、节点、节点B、演进节点B(eNB)或某种其它网络实体，并且可以包括以上网络实体的功能中的一些或所有功能。基站可以通过空中接口与无线终端进行通信。该通信可以通过一个或多个扇区来进行。基站可以通过将所接收的空中接口帧转换成IP分组，来用作无线终端和接入网络的其余部分之间的路由器，其中所述接入网络包括互联网协议(IP)网络。基站还可以对空中接口属性的管理进行协调，并且还可以是有线网络和无线网络之间的网关。
本申请将围绕可包括多个设备、组件、模块等的系统来呈现各个方面、实施例或特征。应当理解和明白的是，各个系统可以包括另外的设备、组件、模块等，并且/或者可以并不包括结合附图讨论的所有设备、组件、模块等。此外，还可以使用这些方案的组合。
另外，在本发明中，“示例性”一词用于表示作例子、例证或说明。本申请中被描述为“示例性”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用示例性的一词旨在以具体方式呈现概念。
可以将各个公开的实施例并入到通信系统中。在一个示例中，该通信系统使用正交频分复用(OFDM)，其中，OFDM有效地将整个系统带宽划分为多个子载波，其中这些子载波还称为频率子信道、音调或频段。
本发明实施例描述的网络架构以及业务场景是为了更加清楚的说明本发明实施例的技术方案，并不构成对于本发明实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本发明实施例提供的技术方案对于类似的技术问题，同样适用。
下面以无线通信网络中4G网络的场景为例进行说明。
LTE网络采用了OFDM技术。OFDM是一种多载波传输方式，复用的各路信号(各路子载波)是正交的。OFDM技术通过串/并转换将高速的数据流变成多路并行的低速数据流，再将它们分配到若干个不同频率的子载波上的子信道中传输。OFDM技术利用了相互正交的子载波，每个子载波对应一个符号，从而子载波的频谱是重叠的，这样可以大大的提高频谱利用率。在OFDM系统中，子载波间隔Δf是指OFDM系统中两个相邻子载波的频率差。OFDM系统带宽等于子载波间隔乘以系统理论最大子载波数。系统理论最大子载波数是不考虑频率保护带的情况下的最大子载波数，但是实际上OFDM系统通常会预留10％左右的保护带宽，因此系统实际配置的子载波数目会小于最大子载波数。
LTE物理层规定了时域最小时间单位：TS＝1/(15000×2048)s＝32.55ns，对应着 30.72MHz的基带采样率。LTE物理层上行和下行传输都以无线帧为间隔，一个无线帧为TS＝307200×TS＝10ms。LTE物理层存在两种无线帧类型：Type1，用于FDD(frequency division duplexing，频分双工)；Type2，用于TDD(time division duplexing，时分双工)，这两种帧类型结构上有所差异。帧类型Type1适用于全双工和半双工的FDD(frequency division duplexing，频分双工)。每个10ms的无线分为20个时隙，每个时隙长度Tslot＝15360×TS＝0.5ms，标号为0～19。标号为2i和2i+1的两个连续时隙组成一个子帧i，子帧长度为1ms，标号为0～9。对于FDD，在每个10ms间隔，可用于下行传输和上行传输的资源都是10个子帧，因为其上行和下行传输是在频域分隔的。帧类型Type2用于TDD。无线帧分为两个长为Tslot＝153600×TS＝5ms的半帧，每个半帧包含8个长为Tslot＝15360×TS＝0.5ms的时隙和3个特殊时隙(域)：DwPTS、GP和UpPTS。DwPTS和UpPTS的长度是可配置的，但是DwPTS、UpPTS和GP的总长度为1ms。子帧1和6包含DwPTS，GP和UpPTS；其他子帧定义为：时隙2i和时隙2i+1构成子帧i。子帧0和子帧5只能用于下行传输。支持灵活的上下行配置，支持5ms和10ms的切换点周期。
为了克服无线多径信道时间弥散引起的符号间干扰和子载波间干扰，引入了循环前缀CP。循环前缀是指将子载波间的保护间隔设置成符号序列的循环复制，即将每个OFDM符号的后Tg时间内的样点复制到OFDM符号的前面，形成前缀，其中Tg为保护间隔的长度。由于多径时延扩展和小区半径及无线信道传播环境相关，一般来说小区半径大多径时延扩展也会大一些，同时LTE的SFN(single-Frequency network)中也需要较大的CP长度，因此LTE定义了两种CP长度：短CP，应用于小小区环境，最优化CP开销；长CP(也称扩展CP)，应用于时间弥散很大或者SFN操作的情况。一个时隙中OFDM符号个数
Figure PCTCN2015083388-appb-000001
取决于CP长度和子载波间隔，具体的，一个OFDM符号所占的时间为OFDM符号长度(所占的时间)与CP长度之和，而OFDM符号长度为1/子载波间隔。在子载波间隔为15KHz的情况时，有两种CP长度，分别对应于每时隙7个OFDM 符号和6个OFDM符号。而在子载波间隔为7.5KHz的情况时，仅有一种CP长度，对应于每时隙3个OFDM符号。
每个时隙周期内占用的
Figure PCTCN2015083388-appb-000002
个子载波和
Figure PCTCN2015083388-appb-000003
个OFDM符号组成称为一个资源格，资源格(resource grid)的结构如图1所示。
Figure PCTCN2015083388-appb-000004
的值取决于下行发射的带宽，并且满足
Figure PCTCN2015083388-appb-000005
其中
Figure PCTCN2015083388-appb-000006
和
Figure PCTCN2015083388-appb-000007
为支持的最小和最大下行传输带宽。天线端口p的资源格的一个元素被称为资源单元(resource element)，被频域和时域坐标(k,l)唯一确定，其中
Figure PCTCN2015083388-appb-000008
Figure PCTCN2015083388-appb-000009
物理意义为LTE系统中一个时隙内某个子载波上的一个调制符号。资源块(resource block，RB)用于描述某个特定的物理信道到资源单元的映射。一个物理资源块被定义为时域内占用
Figure PCTCN2015083388-appb-000010
个连续OFDM符号，频域内占用连续
Figure PCTCN2015083388-appb-000011
个子载波的资源。示例性的，
Figure PCTCN2015083388-appb-000012
和可以由下表给出。
Figure PCTCN2015083388-appb-000014
一个物理资源块(physical resource block，PRB)包含
Figure PCTCN2015083388-appb-000015
个资源单元，在时域内持续周期为一个时隙，频域内占据180KHz。在频域上物理资源块的编号从0到
Figure PCTCN2015083388-appb-000016
物理资源块在频域的编号nPRB和资源单元(k,l)的对应关系为：
Figure PCTCN2015083388-appb-000017
其中k为频域索引，l为时域索引。
在现有的无线通信网络中，以LTE网络为例，UE若要接入到LTE小区，必须进行小区搜索(cell search)过程，即UE检测小区标识(ID)并获得该小 区时频同步的过程。
小区搜索是UE实现与E-UTRAN下行时频同步并获取服务小区ID的过程，基本的小区搜索过程分为两个步骤：
第一步：UE解调主同步信号实现符号同步，并获取小区组内ID，实现粗频偏估计；
第二步：UE解调辅同步信号实现帧同步，并获取CP长度和小区组ID，实现精频偏估计。
在现有的LTE协议中，服务小区ID称为物理层小区ID(表示为
Figure PCTCN2015083388-appb-000018
)，小区组内ID称为物理层ID(表示为
Figure PCTCN2015083388-appb-000019
)，指的是物理层小区ID组中的物理层ID，小区组ID称为物理层小区ID组(表示为
Figure PCTCN2015083388-appb-000020
)。在现有的LTE协议中，
Figure PCTCN2015083388-appb-000021
其中，
Figure PCTCN2015083388-appb-000022
取值为0，1，或2；
Figure PCTCN2015083388-appb-000023
取值为0到167(含0和167)的整数。
初始化小区搜索(initial cell search)：
UE上电后开始进行初始化小区搜索，UE第一次开机时并不知道网络的带宽和频点；
UE会重复基本的小区搜索过程，遍历整个频谱的各个频点尝试解调同步信号，这个过程耗时较长，但一般对这个时间要求并不严格，可以通过一些方法缩短以后的UE初始化时间，如UE储存以前的可用网络信息，开机后优先搜索这些网络；
一旦UE搜寻到可用网络并与网络实现时频同步，获得服务小区ID，即完成小区搜索后，UE将解调下行物理广播信道(PBCH)，获取系统带宽、发射天线数等系统信息；
可以看到，以上UE的小区搜索过程与传输的业务无关。
完成上述过程后，若UE不发起主叫，则UE解调物理下行控制信道(PDCCH)，获取网络指配给这个UE的寻呼周期，然后在固定的寻呼周期中从IDLE态醒来解调PDCCH，监听寻呼。如果有属于该UE的寻呼，则解调指定 的物理下行共享信道(PDSCH)资源，接收寻呼；
若UE发起主叫，UE会发起随机接入(如通过物理随机接入信道PRACH)，并且要求分配上行资源，通过读取控制信道如PDCCH获取上行资源，随后进行上行的传输(如通过物理上行共享信道PUSCH)。
当前LTE的小区搜索可以支持所有的下行发射带宽(也称为系统带宽)：1.4MHz，3MHz，5MHz，10MHz，15MHz和20MHz。可以理解的是，这里的系统带宽也可称为一个载波所占的带宽。由于具体实现时不同的载波之间可以设有保护间隔，实际实现时下行发射带宽会小于系统带宽，这里不考虑保护间隔的影响。载波是由频谱上一段连续的频域资源组成的，将该载波上的资源再划分，每一段划分得到的连续的频域资源在本发明实施例中称为该载波的子频段。由上可知，小区同步可以获得的信息包括符号和无线帧的定时信息，频率信息，小区ID，CP长度，系统带宽和天线配置(从PBCH读取)等。在LTE网络中，同步过程采用了两种物理信号，分别是主同步信号(PSS，也称主同步信道PSCH)和辅同步信号(SSS，也称辅同步信道SSCH)。主同步信号用于获取5ms时钟和小区组内ID，辅同步信号用于获取无线帧时钟和小区组ID。现有的LTE同步信道位于每个无线帧的0号和5号子帧，频域上占带宽中间的6个PRB中。以帧类型Type1为例，时域上，主同步信号映射到每个无线帧的第1个时隙(时隙0)和第11个时隙(时隙10)的最后一个符号上，即
Figure PCTCN2015083388-appb-000024
频域上，主同步信号映射到DC(direct current，直流)子载波(在该载波上不发送任何数据符号)附近的62个子载波上。时域上，辅同步信号映射到每个无线帧的时隙0和时隙10的倒数第二个符号上；在频域上，辅同步信号也映射到DC子载波附近的62个子载波上。而在帧类型Type2中，主同步信号位于第3个和第13个时隙的第3个符号上，辅同步信号比主同步信号早3个符号，即辅同步信号位于第2个和第12个时隙的最后一个符号上。在本发明实施例中，将主同步信道和辅同步信道统称为同步信道。
随着LTE技术的发展，由于业务类型的增多，将不同类型的业务在同一载 波的同一时刻进行发送成为需求，从而可以实现零散载波的有效利用，提高频谱效率。其中，零散载波是指载波上零散分布的带宽较小的空闲部分。此外，新定义的以服务为导向的无线接入网(service orientation RAN(radio access network),SOR)场景中，一个基站可以同时向多个UE发送多种类型的业务，也可以向一个UE发送多种类型的业务。当前已存在的业务类型包括MTC业务，D2D业务，单播业务和多播业务等。图2为基站向多个UE发送不同的业务数据的示意图。对于各种类型的业务，由于其所采用的子载波间隔及CP的不同，其各自对应的帧结构也不同。在本发明所有实施例中，业务的帧结构包括传输业务数据时所采用的子载波间隔，CP长度，以及业务所占频域资源和时域资源。信道的结构包括传输信道时所用的子载波间隔，CP长度，时域资源和频域资源。其中，时域资源可以包括绝对时间或相对时间，其中相对时间可以包括所占符号在子帧中的相对位置，或，所占子帧在无线帧中的相对位置，或，所占无线帧的帧号等。频域资源也可以包括绝对频率或相对频率，其中相对频率可以包括所占的RB的频率在一个载波中的位置。图3示出了几种常见的业务对应的帧结构，从上至下依次为子载波间隔15KHz，正常CP的单播业务对应的帧结构1(正常CP(NCP(normal CP))，15KHz)，子载波间隔15KHz，扩展CP的多播业务对应的帧结构2(扩展CP(ECP(extended CP))，15KHz)，子载波间隔1.25KHz的窄带MTC业务对应的帧结构3(NW(narrow bandwidth)，1.25KHz)，以及子载波间隔150KHz的高频宽带业务对应的帧结构4(WW(wide bandwidth)，150KHz)。可以看到，由于各种类型的业务所对应的子载波间隔和CP长度的不同，各种类型的业务对应的帧结构可能会在时域上无法对齐，比如帧结构1和帧结构3就没有对齐。而现有的LTE网络的方案中，同步信道仅在一个载波频段中间的6个PRB发送，且同步信道的时频位置与子载波间隔为15KHz，正常CP的帧结构对应，这样会导致有些类型的业务无法通过现有方案实现接入同步。在本发明所有实施例中将时频位置与子载波间隔为15KHz，正常CP的帧结构对应的同步信道称为legacy同步信道。
本发明实施例提供一种公共信息发送的方法，可以用于存在多种业务的场 景。其中，公共信息可以包括同步信号，广播信号和系统消息中的至少一种。在本发明实施例中，以无线网络设备为基站和UE为例进行描述。本发明实施例中多种业务在同一个载波中传输，和多种业务中的任意一个对应的公共信息的信道也在前述同一个载波中传输。其中，公共信息的信道是指用于承载公共信息的信道。
可选的，多种业务可以在同一个载波的同一个子帧上传输。
可选的，和多种业务中的至少两个业务对应的两个公共信息的信道也可以在同一个载波的同一个子帧上传输，其中，传输公共信息的信道的载波和传输前述业务的载波相同。
可选的，多种业务可以是与多个UE之间的业务，也可以是与同一个UE之间的业务。
可选的，公共信息的信道的结构可以与业务特性相对应，其中，业务特征可以包括业务的类型和业务的帧结构中的至少一项。这样，可以使具有某特性的业务可以依据与其对应的公共信息的信道进行接入，避免了现有技术中有些业务无法利用现有的公共信息的信道进行接入的问题。由于同一个载波中可以包括至少两种业务，因而同一个载波中也可以包括至少两个公共信息的信道，和前述至少两种业务相对应。
其中，通常业务的类型(可简写为业务类型)和业务的帧结构(可简写为业务帧结构)之间的关系可以是：多种类型的业务对应一种帧结构，或，不同类型的业务对应不同的帧结构(即一一对应)，也可以是一种类型的业务对应多种帧结构，在此不予限定。
(1)公共信息的信道的结构与业务的帧结构相对应的情况：
可选的，在本发明实施例中，公共信息的信道的结构可以与业务的帧结构相对应，以使具有某一帧结构的业务(如帧结构A的业务)可以依据与其对应的公共信息的信道(如信道A)进行接入，避免了现有技术中有些类型的业务无法利用现有的公共信息的信道进行接入的问题。
可选的，公共信息的信道的结构可以与业务的帧结构相对应包括：具有某 一帧结构的业务(如帧结构A的业务)和与其对应的公共信息的信道(如信道A)具有相同的子载波间隔和CP长度。这样，可以使得具有某一帧结构的业务和与其对应的公共信息的信道在时域上对齐，便于该业务的接入。
可选的，公共信息的信道的结构可以与业务的帧结构相对应包括：具有某一帧结构的业务(如帧结构A的业务)和与其对应的公共信息的信道(如信道A)所使用的频域资源相对应。可选的，与其对应的公共信息的信道所占的子频段和具有某一帧结构的业务所占的子频段相同。这样，可以使得UE在接入时，可以仅针对所需接入的业务所对应的频段进行盲检，可以降低UE实现的复杂度并节电。
可选的，公共信息的信道的结构可以与业务的帧结构相对应包括：具有某一帧结构的业务(如帧结构A的业务)和与其对应的公共信息的信道(如信道A)具有相同的子载波间隔，不同的CP长度。这种情况下，公共信息的信道中的同步信道至少占一个子帧中的最后一个符号，且该符号所在子帧与所述业务的帧结构中的子帧的时域边界对齐。这样，一方面可以使得具有某一帧结构的业务和与其对应的公共信息的信道在时域上对齐，便于该业务的接入，另一方面，公共信息的信道可以被具有不同帧结构的业务共用，可以减少公共信息的信道所占用的资源。
可选的，公共信息的信道的结构可以与业务的帧结构相对应包括：具有相同类型的业务对应相同的公共信息的信道。这样，由于业务类型相同，通常业务的帧结构也相同，则可以依据业务的类型来分配公共信息的信道，可以使得UE在接收不同类型的业务时，仅关注其所接收的类型的业务所对应的公共信息的信道即可。可选的，在两个相同类型的业务位于上述同一个载波的不同子频段上时，在其中一个业务的子频段上传输的公共信息可以携带另一个业务的子频段信息。可以理解的是，二者的子频段的偏置如果是固定的，那么该子频段的信息也可以不携带。
可选的，公共信息的信道的结构可以与业务的帧结构相对应包括：具有相同子载波间隔和相同CP长度的业务对应相同的公共信息的信道，或者，具有相 同子载波间隔和不同CP长度的业务对应相同的公共信息的信道。这样，可以依据业务的帧结构来分配公共信息的信道，而不是依据业务的类型分配公共信息的信道，由于不同类型的业务可能具有相同的帧结构，故而可以减少公共信息的信道所占用的资源。可选的，前述对应相同公共信息的信道的两个业务位于上述同一个载波的不同子频段上时，在其中一个业务的子频段上传输的公共信息可以携带另一个业务的子频段信息。可以理解的是，二者的子频段的偏置如果是固定的，那么该子频段的信息也可以不携带。
可选的，公共信息的信道的结构可以与业务的帧结构相对应包括：具有某一帧结构的业务(如帧结构A的业务)和与其对应的公共信息的信道(如信道A)所使用的码字资源相对应。即，不同帧结构的业务，其对应的公共信息的信道所使用的码字资源不同。这样，便于UE在接收某一帧结构的业务时，识别其对应的公共信息的信道。
可选的，公共信息的信道的结构可以与业务的帧结构相对应包括：若具有某一帧结构的业务(如帧结构A的业务)和与其对应的公共信息的信道(如信道A)所使用的频域资源相对应，则不同帧结构的业务和与其对应的公共信息的信道所使用的码字资源可以相同，也可以不同。这样，UE可以在接收某一帧结构的业务时，通过频域资源识别其对应的公共信息的信道。不同帧结构的业务和与其对应的公共信息的信道所使用的码字资源可以相同时，还可以减少码字资源的使用，降低发送侧和接收侧的实现复杂度。
可选的，公共信息的信道的结构可以与业务的帧结构相对应包括：若具有某一帧结构的业务(如帧结构A的业务)和与其对应的公共信息的信道(如信道A)所使用的频域资源相对应，则不同帧结构的业务和与其对应的公共信息的信道所使用的时域资源可以相同，也可以不同。这样，UE可以在接收某一帧结构的业务时，通过频域资源识别其对应的公共信息的信道。不同帧结构的业务和与其对应的公共信息的信道所使用的时域资源相同的情况下，还可以减少降低发送侧和接收侧的实现复杂度。
可选的，在本发明实施例中，还可以在某一帧结构的业务(如帧结构B的 业务)对应的公共信息的信道(如信道B)中承载用于其他帧结构的业务(如帧结构C的业务)进行接入的信息(承载有接入信息的信道B称为信道C)，比如，在某一公共信息的信道中承载另一帧结构的业务进行接入所需的频率信息，如与现有的公共信息的信道的频率的差值(offset)，和/或，在某一公共信息的信道中承载另一帧结构的业务进行接入所需的时间信息，如与现有的公共信息的信道的时间的差值，以便实现不同帧结构的业务接入的同时，减少资源的使用。
可选的，与某一帧结构的业务对应的公共信息的信道(如信道A或信道C)的发送可以由UE触发后进行发送。UE的触发是在UE通过另一公共信息的信道与基站实现同步后发送的。这样，可以在UE还未进行某一业务的传输前，通过一公共信息的信道(如信道B)与基站先获得同步，比如通过现有的公共信息的信道进行同步，而后在该业务需要传输时，触发基站下发与该业务对应的公共信息的信道，进而实现该业务的传输。
(2)公共信息的信道的结构与业务的类型相对应的情况：
公共信息的信道的结构可以与业务的类型相对应。比如，在业务类型相同，则业务的帧结构相同(比如，子载波间隔相同且CP长度相同，或者，子载波间隔相同且CP长度不同)，而业务类型不同，则业务的帧结构可能相同也可能不同，即业务类型的个数比对应的业务的帧结构多的情况下，采用公共信息的信道的结构与业务的类型相对应的方式进行公共信息的信道的配置。
方法(2)与上述方法(1)的区别在于，公共信息的信道的结构可以与业务的类型相对应，以使某类型的业务(如业务A)可以依据与其对应的公共信息的信道(如信道A)进行接入，避免了现有技术中有些类型的业务无法利用现有的公共信息的信道进行接入的问题。上述方法中提到的某一帧结构的业务相应的变为某类型的业务。涉及到该类型的业务的帧结构其他的描述可以参考上述方法中的描述，在此不予赘述。
(3)公共信息的信道的结构同时考虑业务的类型和业务的帧结构的情况
在配置时，由于业务的类型和业务的帧结构之间的对应关系可以是一对多，一对一，或多对一，可以在配置公共信息的信道时采用考虑业务的类型与业务 的帧结构相结合的方式。
示例的，业务类型相同的某两个业务，其子载波间隔相同但CP长度不同(即帧结构不同)，则在考虑业务类型之后，还可以进一步考虑帧结构，来进行公共信息的信道的配置，由于针对子载波间隔相同但CP长度不同的两个业务，系统设计为配置不同的两个公共信息的信道，则系统为这两个类型相同的业务配置两个公共信息的信道，分别用于这两个业务对应的公共信息的发送。
示例的，业务类型不同的某两个业务，其子载波间隔相同且CP长度也相同)，但所在子频段不同，则在考虑业务类型之后，还可以进一步考虑帧结构，来进行公共信息的信道的配置，比如按照预设规则，或需求，可以配置两个公共信息的信道分别位于这两个业务各自的子频段内，也可以配置一个公共信息的信道位于其中一个业务的子频段内，另一个业务共用该公共信息的信道，该公共信息的信道携带该另一个业务的频域资源信息。
同理的，也可以先考虑帧结构再考虑业务类型，其原理和方法和前述单独考虑帧结构或业务类型，或，先考虑业务类型再考虑帧结构，的类似，在此不予赘述。
由于本发明实施例提供的公共信息信道的配置或传输与传输的业务相关(相对应)，因而可以实现多种不同业务的传输前的所需的公共信息的接收。进一步的，UE可以依据其所要传输的业务进行相应的公共信息信道的接收，比如，在频率同步时间失步的情况下，可以仅在其要传输的业务相关的某个子频段进行小区搜索，从而可以降低UE的实现复杂度，并可以节省UE的资源消耗。
基于前述方法，本发明实施例一提供一种公共信息的信道的结构，可以用于存在多种类型的业务的场景。其中，公共信息可以但不限于包括同步信号，广播信号和系统消息中的至少一种。如图4所示，在FDD系统中，该信道的结构包括：
在同一个载波包含至少两个公共信息的信道，所述至少两个公共信息的信道包括第一公共信息的信道和第二公共信息的信道，第一公共信息的信道和第 二公共信息的信道在不同的子频段上。
可选的，第一公共信息和第二公共信息可以具有相同的功能。比如，均为主同步信号，或，均为辅同步信号。
可选的，两个公共信息的信道占用不同的时域资源和/或码字资源。
可选的，两个公共信息的信道均占用各自子频段的中间资源块(RB)。
可选的，第一公共信息的信道结构和第二公共信息的信道结构不同。
其中，在本发明所有实施例中，由于主同步信号和辅同步信号共同用于实现同步，主同步信号和辅同步信号构成一个公共信息信道(即同步信道)。可以理解的是，在某些网络，如未来的网络中，同步信道可以仅包括一个同步信号(不区分主辅)。本发明实施例对此不予限定。
其中，在前述同一个载波中还可以包含至少两种业务。
其中，第一、第二用于区分信道及与该信道相对应的描述。
其中，任意一种信道结构包括传输该信道所用的子载波间隔，CP长度，时域资源和频域资源。其中，频域资源包括所占用的子频段。可选的，第一公共信息的信道结构至少包括传输该信道所用的第一子载波间隔，第一CP长度和第一子频段；第二公共信息的信道结构包括传输该信道所用的第二子载波间隔，第二CP长度和第二子频段。
上述公共信息包括同步信号、广播信号和系统消息中的至少一种。
可选的，第一公共信息的信道结构和第二公共信息的信道结构不同可以包括：第一子载波间隔和第二子载波间隔不同且第一循环前缀长度和第二循环前缀长度不同。
可选的，第一公共信息的信道结构和第二公共信息的信道结构不同可以包括：第一子载波间隔和第二子载波间隔相同且第一循环前缀长度和第二循环前缀长度不同。
可选的，上述结构还包括：
第一公共信息的信道结构与第一业务特性相对应，第二公共信息的信道结构与第二业务特性相对应。其中，第一或第二业务特性可以包括业务类型和业 务帧结构中的至少一项。可以理解的是，在第一业务特性为业务类型时，第二业务特性的描述也是针对业务类型的，在第一业务特性为业务帧结构时，第二业务特性的描述也是针对业务帧结构的。
具体的公共信息的信道结构与业务特性相对应的情况可以参考上述方法中的描述，在此不予赘述。
如图5所示，在TDD系统中，该信道的结构包括：
在同一个载波包含至少两个公共信息的信道，所述至少两个公共信息的信道包括第一公共信息的信道和第二公共信息的信道，第一公共信息的信道和第二公共信息的信道在相同的子频段的不同时间段，第一公共信息的信道和第二公共信息的信道的子载波间隔相同且CP长度不同，或者，第一公共信息的信道和第二公共信息的信道的子载波间隔不同且CP长度不同。
可选的，第一公共信息和第二公共信息可以具有相同的功能。比如，均为主同步信号，或，均为辅同步信号。
可选的，两个公共信息的信道占用不同的时域资源和/或码字资源。这里的时域资源可以指所占用的符号位置在所在的子帧中的相对位置。
可选的，两个公共信息的信道均占用所在子频段的中间资源块(RB)。
可选的，第一公共信息的信道结构和第二公共信息的信道结构不同。
其中，在前述同一个载波中还可以包含至少两种业务。
其中，第一、第二用于区分信道及与该信道相对应的描述。
其中，任意一种信道结构包括传输该信道所用的子载波间隔，CP长度，时域资源和频域资源。其中，频域资源包括所占用的子频段。时域资源包括所占用的时间段。可选的，第一公共信息的信道结构至少包括传输该信道所用的第一子载波间隔，第一CP长度和第一时间段；第二公共信息的信道结构包括传输该信道所用的第二子载波间隔，第二CP长度和第二时间段。
上述公共信息包括同步信号、广播信号和系统消息中的至少一种。
可选的，第一公共信息的信道结构和第二公共信息的信道结构不同可以包括：第一子载波间隔和第二子载波间隔不同且第一循环前缀长度和第二循环前 缀长度不同。
可选的，第一公共信息的信道结构和第二公共信息的信道结构不同可以包括：第一子载波间隔和第二子载波间隔相同且第一循环前缀长度和第二循环前缀长度不同。
可选的，上述结构还包括：
第一公共信息的信道结构与第一业务特性相对应，第二公共信息的信道结构与第二业务特性相对应。其中，第一或第二业务特性可以包括业务类型和业务帧结构中的至少一项。可以理解的是，在第一业务特性为业务类型时，第二业务特性的描述也是针对业务类型的，在第一业务特性为业务帧结构时，第二业务特性的描述也是针对业务帧结构的。
具体的公共信息的信道结构与业务特性相对应的情况可以参考上述方法中的描述，在此不予赘述。
示例的，下面以公共信息的信道为同步信道为例进行信道结构或是发送方法的具体的描述。
资源复用方式
两个同步信道占用不同的资源。资源可以包括时域资源、频域资源和码字资源中的至少一种或多种。占用不同的资源包括所占用的时域资源、频域资源和码字资源三种资源中的至少一种不相同。
作为一种实现方式，至少两个同步信道可以在同一个载波的不同子频段上进行发送，即频分复用。示例性的，如图4所示，第一同步信道在同一个载波的第一子频段(子频段1)上发送，第二同步信道在前述载波的第二子频段(子频段2)上发送。进一步的，第一业务也在第一子频段(子频段1)上发送，示例的，第一同步信道占该第一子频段的中间位置，同样的，第二业务在第二子频段(子频段2)上发送，示例的，第二同步信道占该第二子频段的中间位置(即中间资源块)。在这种方式下，第一同步信道和第二同步信道可以位于同一个子帧的相同或不同的符号位置，或，位于不同的子帧的相同的符号位置，或，位 于不同的子帧的不同的符号位置。
作为另一种实现方法，至少两个同步信道可以在同一个载波的相同子频段(子频段3)的不同时间段上发送，即时分复用。示例性的，如图5所示，第一业务和第二业务也在子频段3的不同时间段上发送，即时分复用。相应的，第一同步信道在第一业务所在的时间段上发送，第二同步信道在第二业务所在的时间段上发送，第一同步信道和第二同步信道的具体位置可以依实现而定。频域上，第一同步信道在频率上可以位于子频段3的中间位置，第二同步信道在频率上也可以位于子频段3的中间位置。
不管是以上频分复用的实现方式还是时分复用的实现方式，第一同步信道和第二同步信道可以采用相同的序列，也可以采用不同的序列。
在频分复用的情况下，第一同步信道和第二同步信道的时域资源可以相同，也可以不同。
示例的，以FDD帧类型下的15KHz，扩展CP的单播业务和7.5KHz，扩展CP的广播多播业务为例，两者的同步信道的时频位置，资源映射和对应序列可以如图6-9所示。
图6为单播业务的同步信号的时域位置示意图，图7为单播业务的同步信号的频域位置示意图。其中，图6中以子帧长度为1ms，一个子帧包括两个时隙，每个时隙为0.5ms为例进行示意。如图6和图7所示，单播的同步信号时域位于第一个时隙(slot)的最后两个符号，频域位于中间6个资源块(RB)(1.08M)(主同步信号和辅同步信号所使用的频域资源相同)。主同步信号(P-SCH)采用ZC序列(具体序列生成可参考现有技术)，根指数为25，29，34，资源映射为映射到DC附近的62个子载波上，第一个slot的倒数第一个符号。辅同步信号(S-SCH)采用M序列(具体序列生成可参考现有技术)，资源映射为DC附近的62个子载波，第一个slot的倒数第二个符号上。
图8为7.5KHz专用广播多播业务的同步信号的时域位置示意图，图9为7.5KHz专用广播多播业务的同步信号的频域位置示意图。其中，图8中以子帧 长度为1ms，一个子帧包括两个时隙，每个时隙为0.5ms为例进行示意。如图8和图9所示，一个slot包含3个符号，同步信号包括主同步信号和辅同步信号，时域位于第一个slot的最后一个符号上，频域位于中间12个RB上(1.08M)。主同步信号采用ZC序列，根指数可以是与前述单播业务不同的根指数(例如23，27，37)生成不同的主同步信号。映射到DC附近的62个子载波上(如图9所示PSC)。辅同步信号采用M序列，可以与前述单播业务生成的序列相同(生成方式不变)或者不同，映射到主同步信号两边的62个子载波上，如图9所示(如图9所示SSC)。
同步信道的分配
可选的，作为一种实现方式，在同一载波中传输至少两个业务，至少两个业务包括第一业务和第二业务。第一业务对应的第一帧结构和第二业务对应的第二帧结构不同具体可以为：第一帧结构和第二帧结构的子载波间隔不同且CP长度不同。在前述同一载波中为第一业务分配第一同步信道，为第二业务分配第二同步信道。第一同步信道的子载波间隔和CP长度与第一业务的相同，第二同步信道的子载波间隔和CP长度与第二业务的相同。
在这种实现方式中，当至少两个业务还包括第三业务，第三业务对应第三帧结构，第三帧结构和第二帧结构的子载波间隔相同，CP长度不同，但一个子帧内包含的最后一个符号的时域边界对齐时，和第二帧结构对应的第二同步信道还可以对应于第三帧结构，即对应于第三业务。也就是说，第二业务和第三业务共用一个同步信道。当至少两个业务还包括第四业务，第四业务对应第四帧结构，第四帧结构和第二帧结构的子载波间隔相同，CP长度相同时，和第二帧结构对应的第二同步信道还可以对应于第四帧结构，即对应于第四业务。也就是说，第二业务和第四业务共用一个同步信道。可以理解的是，在此仅以第二业务与其他业务共用一个同步信道为例进行描述，在第一业务与其他业务对应的帧结构存在前述关系时，第一业务也可与其他业务共用第一同步信道。第一业务或第二业务均为泛指，第一和第二用于区分两个业务的描述，并无其他 限定。
可选的，作为另一种实现方式，同步信道的共用原则更为严厉。当至少两个业务还包括第三业务，第三业务对应第三帧结构，只有第三帧结构和第二帧结构的子载波间隔相同且CP长度相同时，和第二帧结构对应的第二同步信道还可以对应于第三帧结构，即对应于第三业务。也就是说，第二业务和第三业务共用一个同步信道。当至少两种业务还包括第四业务，第四业务对应第四帧结构，第四帧结构和第二帧结构的子载波间隔相同，CP长度不同，不管子帧内包含的最后一个符号的时域边界是否对齐，第四帧结构和第二帧结构都不共用一个同步信道，而是在前述同一个载波中为第四业务分配与第四业务对应的第四同步信道。可以理解的是，在此仅以第二业务与其他业务共用一个同步信道为例进行描述，在第一业务与其他业务对应的帧结构存在前述关系时，第一业务也可与其他业务共用第一同步信道。第一业务或第二业务均为泛指，第一和第二用于区分两个业务的描述，并无其他限定。
可以看到，以上描述的同步信道是否共用的原则，一方面是看业务所对应的子载波间隔是否相同，当子载波间隔不同时，同步信道不可以共用；当子载波间隔相同时，可以进一步看业务所对应的帧结构的一个子帧内最后一个符号的时域边界是否对齐，一个子帧内最后一个符号的时域边界不对齐时，同步信道不可以共同。可选的，在看业务所对应的帧结构的一个子帧内最后一个符号的时域边界之前还可以看CP长度是否相同，如果相同，则同步信道可以共同，如果不相同则再看一个子帧内最后一个符号的时域边界是否对齐。当采用较为宽松的共用原则时，一个子帧内最后一个符号的时域边界对齐，则可共用同步信道；当采用较为严厉的共用原则时，一个子帧内最后一个符号的时域边界对齐，也不共用同步信道。为了简化同一个载波为多个业务所用同步信道的分配，可以通过对现有LTE协议的一些修改或补充，使得在新的协议中共用一个载波的各个业务对应的帧结构的一个子帧内的最后一个符号的时域边界均对齐。这样，在配置同步信道时，考虑各个业务的子载波间隔即可。示例性的，可以将现有LTE协议中的子帧长度进行修改，使得在新的协议中将子帧长度定义为可 能共用同一个载波的多个业务的符号长度(含CP长度)的最小公倍数的N倍(N的取值在大于或等于1的正整数中选择，具体取值可考虑其他因素而定)，这样，可以使得共用同一个载波的多个业务对应的帧结构的一个子帧内的最后一个符号的时域边界均对齐。或者，可以将现有LTE协议中的CP长度进行补充或修改，使得在新的协议中CP长度针对可能共用同一个载波的多个业务的CP长度进行设计，以使得各个业务对应的帧结构的一个子帧内的最后一个符号的时域边界均对齐。或者，对现有LTE协议中的子帧长度和CP长度都进行修改或补充，以使得在新的协议中各个业务对应的帧结构的一个子帧内的最后一个符号的时域边界均对齐。具体的修改或补充方式，在此不予赘述。
针对子帧长度的修改，示例性的，比如存在单播业务，多播业务，窄带MTC业务和高频宽度业务4种业务，其中，
单播业务，业务特征为15KHz子载波间隔，正常CP，则1ms有14个符号，每个符号长度1/14ms；
多播业务，业务特征为15KHz子载波间隔，扩展CP，1ms有12个符号,每个符号长度1/12ms；
窄带MTC业务，业务特征为1.25KHz子载波间隔，扩展CP，1ms有1个符号,每个符号长度1ms；
高频宽带业务，业务特征为3.75KHz子载波间隔，扩展CP，1ms有3个符号,每个符号长度为1/3ms；
以上4种符号长度取最小公倍数(例如：1/14，1/12，1，1/3)为1ms，则子帧长度可以选择为2ms，以和现有的一个子帧包括两个slot，包括偶数个符号数的情况相兼容。
可选的，作为另一种实现方式，还可以仅通过判断在同一个载波中传输的业务的类型是否相同来确定是否共用同步信道，如果业务的类型不同，则分配不同的同步信道，若业务的类型相同，则共用同步信道。
可选的，作为另一种实现方式，判断业务的帧结构和业务的类型也可以结合起来确定是否共用同步信道。可以参考前述实施例中的描述。比如在在确定 业务类型相同时则共用同步信道，确定业务类型不同时再看不同业务的帧结构是否满足共用同步信道的条件，具体不同业务的帧结构是否满足共用同步信道的条件可参考前述的描述。
同步信道的发送时机
在第一同步信道和第二同步信道的发送时机方面，作为一种实现方式，第一同步信道和第二同步信道均周期性的发送。
在这种情况下，UE侧可以根据其所接收的业务，与相应的同步信道进行同步，比如业务为第一业务时，与第一同步信道同步，为第二业务时，与第二同步信道同步。UE侧与无线网络侧失步后，也只需根据所接收的业务，与相应的同步信道进行重新同步。这样，UE侧可以不用接收整个载波带宽的信息，只在所接收的业务对应的子频段上接收信息即可。
作为另一种实现方式，第一同步信道周期性发送，第二同步信道根据UE发送的同步请求进行发送，如图10所示的流程。进一步的，第二同步信道可以设定在一个时间窗内进行发送，在收到UE的同步请求时，时间窗开启，在时间窗所设定的时间T到达时，时间窗关闭。在UE侧，UE发送同步请求时，开启时间窗，在时间窗所设定的时间T到达时，若未同步上，则UE再次发送同步请求并触发时间窗的开启，直至同步成功，则停止发送同步请求来触发时间窗的开启。在第一同步信道周期性发送，第二同步信道根据UE发送的同步请求进行发送的情况下，在UE侧，UE侧可以统一通过第一同步信道进行同步，同步后，UE需要接收其他业务时，向基站发同步请求。通常UE的高层会知道其随后要接收什么业务，如果没有需求则可以按照单播业务进行同步。基站收到同步请求后，发送与该业务相对应的第二同步信道，如在该业务所在的子频段上发送第二同步信道，或是在之前所发送的第一同步信道里携带UE接收其他业务所需的同步信息(也可认为是第二同步信道)。可选的，UE所发送的业务请求中可以包括标识业务的信息，以便基站确定发哪个业务对应的同步信道。在这种情况下，UE侧失步时，可以在该业务的频段上进行搜索，如果存在该业务的同步 信号，则与该业务进行同步。如果在该业务频段上没有该业务的同步信号，则先同步到基础的同步信道上，如legacy同步信道，然后发送该业务的同步请求，请求基站发送该业务的同步信道，进而实现同步。
这样，UE可以实现与不同类型业务的同步，同时降低同步信道的开销。
优选的，第一同步信道为legacy同步信道，第二同步信道为其他业务对应的同步信道。这样，可以保证不支持多业务同步信道的UE的兼容性，不支持多业务同步信道的UE仍采用之前的接入方式即可。
UE侧
UE接收基站发送的至少两个同步信道，并根据其业务帧结构，业务类型或者终端类型通过相应的同步信道实现下行时间同步并频率同步到相应的子频段，比如，同步信道为频分复用的方式时，以依据为业务类型为例，当业务类型为第一类型时，UE可以通过第一同步信道实现下行时间同步并频率同步到第一子频段(子频段1)，当业务类型为第二类型时，UE可以通过第二同步信道实现下行时间同步并频率同步到第二子频段(子频段2)。而后，UE可以只在该相应的同步了的子频段进行业务的发送和接收。再如，同步信道为时分复用的方式时，业务类型为第一类型时，UE可以通过第一同步信道实现下行时间同步并频率同步到第一子频段(子频段1)，当业务类型为第二类型时，UE可以通过第二同步信道实现下行时间同步并频率同步到第一子频段(子频段1)。
一种具体的可选方式，UE确定自己要接入什么业务，然后根据业务对应的子载波间隔和序列等去与基站发送的同步信道做相关，进而同步到相应子频段上。UE可以在整个载波上进行扫描，也可以在已知业务的子频段的情况下，在该业务的子频段上进行扫描。
其中，终端类型可以跟某一业务特性对应，比如，对于窄带MTC的终端，其业务就是窄带MTC业务，其终端类型就决定了业务特性。
可选的，作为一种实现方式，UE接收第二同步信道之前，UE根据第一同步信道已实现了下行时间同步和频率同步，UE还可以根据其要接收的业务的业 务帧结构，业务类型或者终端类型向基站发送同步请求，以触发基站下发第二同步信道。可选的，UE在发送请求后，可以设置一个时间段，在这个时间段未同步上，则可以再次进行请求的发送和时间段的设置，若同步成功，则停止发送请求。
可选的，作为一种实现方式，UE在不确定其业务类型时(比如暂时没有业务需求的UE，或是IDLE态的UE需要在某小区驻留)，可先进行一个同步信道的同步，比如第一同步信道的同步，这点可以在UE侧进行设置实现。优选的，第一同步信道为legacy同步信道，第二同步信道为其他类型的业务对应的同步信道。这样，UE可以先同步一个比较基本的同步信道，然后再根据其确定的业务帧结构，业务类型或终端类型向无线网络设备发送同步请求，以触发无线网络设备下发第二同步信道。这样，UE可以实现与不同业务的同步，同时降低同步信道的开销。可选的，UE还可以在同步了legacy同步信道后，如果想接收其他业务，可以根据基站通知的用于时间同步的差值，如符号同步的offset，和/或，用于频率同步的差值，如其他业务对应频段的中心频点的offset。可选的，基站的通知可以通过RRC(radio resource control,无线资源控制)信令或物理层信令完成。可选的，基站的通知也可以是应UE的请求发出的。
在这种情况下，当UE与基站失步时，可以直接在该业务的子频段上进行搜索，如果存在该业务的同步信号，则与该业务的同步信号进行同步。如果在该业务的子频段上没有该业务的同步信号，则先同步到legacy同步信道，然后发送该业务的同步请求，请求eNB发送该业务的同步信道，进而实现同步。
示例的，如图11和图12所示，例如一个基站eNB下有3个UE，UE A，UE B，UE C，其中UE A的当前业务为MTC业务(ECP，1.25KHz)，UE B的当前业务为多播业务(ECP，15KHz)，UE C的当前业务有两种，分别为单播业务(NCP，15KHz)和宽带业务(NCP，150KHz)。其中，图12中以一个子帧长度为1ms为例进行示意。
eNB根据当前需求在20M的一个载波内，在一个子帧中发送4种同步信号，分别为图12中四种同步信号。其中这四种同步信号分别对应4种业务帧结构： 窄带子载波间隔1.25KHz(窄带MTC业务)；子载波间隔15KHz，扩展CP(多播业务)；子载波间隔15KHz，正常CP(单播业务)；宽带子载波间隔150KHz(宽带业务)。并且四种同步信号的时频位置，资源映射和对应的序列中至少一个是不同的。示例的，时频位置不同可以包括所占的带宽不同，或者，时域资源的相对位置不同(如主同步信号和辅同步信号之间的符号间隔不同)。示例的，资源映射可以指信号映射到子载波或者符号的特征。可选的，同步信号的设计还可以是不同，比如某种同步信号可以仅包括主同步信号，或，仅包括辅同步信号，或者，同时包括主辅同步信号。
下面以对应的序列不同为例进行描述。
UE A根据当前业务MTC业务在初次接入时会盲检这个20M载波，并且根据子载波间隔1.25KHz以及对应的序列确定在该载波中的第三个同步信号为需要接入的频段，具体的，UE会预先知道多个对应该帧结构的同步序列，通过序列做相关，确定该同步信号是否为该业务的同步信号，并且通过广播信号得知当前接入频段的带宽为1.4M，接下来的业务数据仅在此1.4M上进行传输。UE还可以通过同步获得小区ID，CP长度等信息。当UE A失步时，可以只盲检这1.4M频域资源就可以实现与eNB的同步。
UE B根据当前业务多播业务在初次接入时会盲检这个20M载波，并且根据15KHz以及对应的序列确定在该载波中的第二个同步信号为需要接入的频段，具体的，UE会预先知道多个对应该帧结构的同步序列，通过序列做相关，确定该同步信号是否为该业务的同步信号，并且通过广播信号得知当前接入频段的带宽为3M，接下来的业务数据仅在此3M上进行传输。UE还可以通过同步获得小区ID，CP长度等信息。当UE B失步时，可以只盲检这3M频域资源就可以实现与eNB的同步。
UE C根据当前业务单播业务和宽带业务在初次接入时会盲检这个20M载波，并且根据15KHz以及对应的序列确定在该载波中的第一个同步信号为需要接入的频段。另外继续检测剩余的带宽部分，根据150KHz以及对应的序列确定在该载波中的第四个同步信号也为需要接入的频段。通过广播信号得知单播业 务接入频段的带宽为5M，接下来的单播业务数据仅在此5M上进行传输，宽带业务接入频段的带宽为10M，接下来的宽带业务数据仅在此10M上进行传输。当UE C单播业务失步时，可以只盲检第一个5M频域资源就可以实现与eNB的同步。当UE C宽带业务失步时，可以只盲检最后10M频域资源就可以实现与eNB的同步。
本发明实施例二提供一种公共信息的发送方法，该方法从发送侧的角度进行描述，如图13所示，可以包括：
S104，第一无线网络设备在同一个载波内发送至少两个公共信息信道。
所述至少两个同步信道包括第一公共信息的信道和第二公共信息的信道。
可选的，所述第一公共信息信道和所述第二公共信息信道在所述同一个载波的不同子频段上。
可选的，在S104之前可以包括第一无线网络设备确定在同一个载波内所需发送的业务包括至少两种业务，该至少两种业务可以包括第一业务和第二业务；
可选的，第一无线网络设备确定所述第一业务对应的第一帧结构和所述第二业务对应的第二帧结构不同；或者，第一业务和第二业务的类型不同。
所述第一公共信息的信道对应第一业务，所述第二公共信息的信道对应第二业务。公共信息至少包括同步信号，广播消息和系统消息中的一项。
示例性的，第一业务为单播业务，第二业务为窄带MTC业务。
具体的描述，如公共信息的信道对应业务的情况，或是公共信息的信道的发送时机，或是资源的配置，或是其他业务的公共信息的信道共用等，可以参考本发明其他实施例的描述，在此不予赘述。
通过发送与业务相对应的公共信息的信道，可以使得第二无线网络设备实现该业务传输所需的公共信息的接收，进而与第一无线网络设备进行后续业务数据的接收和发送。
本发明实施例二还提供一种公共信息的发送方法，该方法从发送侧的角度 进行描述，如图14所示，可以包括：
S202，第一无线网络设备在一个载波内发送第一公共信息的信道；
S204，第一无线网络设备接收第二无线网络设备发送的请求；其中，请求中携带业务的标识；
S206，第一无线网络设备根据所述业务标识在前述的载波内发送第二公共信息的信道，第二公共信息的信道与所述业务相对应。
其中，公共信息至少包括同步信号，广播消息和系统消息中的一项。
进一步的，第一无线网络设备在前述载波内传输所述业务。
其中，具体的描述，如第二公共信息的信道与业务相对应的情况，第一公共信息的信道为基础公共信息信道，时频资源或码字资源的配置等，可以参考本发明其他实施例的描述，在此不予赘述。
可选的，第二公共信息的信道与第一公共信息的信道可以是独立的，也可以是在第一公共信息的信道中增加相应业务接入所需的公共信息，如时域偏移，频域偏移或其他信息中的一项或多项，来得到第二公共信息的信道(可选的，此时第一公共信息的信道也还存在)。这点也可以参考本发明其他实施例的描述，在此不予赘述。
本发明实施例三提供一种公共信息的传输方法，该方法从接收侧的角度进行描述，可以包括：
S302，第二无线网络设备根据所需接收的业务的特性进行公共信息的信道的接收。
其中，公共信息至少包括同步信号，广播消息和系统消息中的一项。
可选的，业务的特性包括业务的帧结构，或，业务的类型，或，第二无线网络设备的类型(如在无线网络设备的类型与业务的类型相关的情况下)。
可选的，第二无线网络设备可以为UE。
可以理解的是，在第二无线网络设备侧，业务的特性与公共信息的信道的帧结构之间的关系，与在第一无线网络设备侧，业务的特性与公共信息的信道 的帧结构之间的关系一致。这样，可以保证第二无线网络设备侧完成公共信息的信道的正确接收。
在本发明实施例中，公共信息的信道的接收与业务的特性相关，这样，第二无线网络设备可以根据业务的特性选择性的进行公共信息的信道的接收，比如频率同步时间失步的情况下，同步接入某业务的特性对应的频段，这样，可以不接收其他频段的信息，可以降低第二无线网络设备的复杂度并且节电。
在本发明实施例中的一种可能的实施方式中，S302可以具体为：
第二无线网络设备根据所需接收的第二业务的特性进行第二公共信息的信道的接收。
进一步的，S302还可以包括：
第二无线网络设备根据所需接收的第一业务的特性进行第一公共信息的信道的接收。
其中，第一业务和第二业务在同一个载波上传输。第一公共信息的信道和第二公共信息的信道也在第一业务和第二业务所在的载波上传输。
在本发明实施例中的另一种可能的实施方式中，S302前，还可以包括：
S301，第二无线网络设备根据所需接收的业务的特性向第一无线网络设备发送公共信息的信道的请求。
S301之前，还可以包括：
S300，第二无线网络设备接收第一公共信息的信道。此时，S302中的公共信息的信道具体为第二公共信息的信道。
第二公共信息的信道与第二业务的特性相对应。
其中，第一公共信息信道与前述第二公共信息信道的结构不同。具体的描述，如公共信息的信道对应业务的情况，或是公共信息的信道的发送时机，或是资源的配置，或是其他业务的公共信息的信道共用等，可以参考本发明其他实施例的描述，在此不予赘述。
可选的，第二公共信息的信道与第一公共信息的信道可以是独立的，也可以是在第一公共信息的信道中增加相应业务接入所需的公共信息，如时域偏移， 频域偏移或其他信息中的一项或多项，来得到第二公共信息的信道(可选的，此时第一公共信息的信道也还存在)。这点也可以参考本发明其他实施例的描述，在此不予赘述。
本发明实施例四提供一种通信系统，如图15所示，包括前述第一无线网络设备1501和前述第二无线网络设备1502。在一种场景下，第一无线网络设备为基站，第二无线网络设备为终端；在另一种场景下，第一无线网络设备为宏基站，第二无线网络设备为微基站，如接入点AP；在再一种场景下，第一无线网络设备为第一终端，第二无线网络设备为第二终端。
其中所涉及的与本发明实施例提供的技术方案相关的概念，解释和详细说明请参见前述方法或其他实施例中关于这些内容的描述，此处不做赘述。
可选的，第一无线网络设备，如图15所示，可以包括收发单元15011和处理单元15012。该无线网络设备可以为基站，也可以为终端。
在一种可能的实施方式中，处理单元15012用于利用收发单元15011在同一个载波内发送至少两个公共信息的信道，所述至少两个同步信道包括第一公共信息的信道和第二公共信息的信道。
可选的，第一公共信息的信道和第二公共信息的信道在不同的子频段上。
进一步的，处理单元15012还可以用于确定在同一个载波内所需发送的业务包括至少两个业务，该至少两个业务可以包括第一业务和第二业务；第一业务对应所述第一公共信息的信道，第二业务对应所述第二公共信息的信道。
其中，公共信息至少包括同步信号，广播消息和系统消息中的一项。
具体的收发单元或处理单元的功能的描述，如公共信息的信道对应业务的情况，或是公共信息的信道的发送时机，或是资源的配置，或是其他业务的公共信息的信道共用等，可以参考本发明其他实施例的描述，在此不予赘述。
通过发送与业务相对应的公共信息的信道，可以使得第二无线网络设备实现该业务传输所需的公共信息的接收，进而与第一无线网络设备进行后续业务 数据的接收和发送。
在另一种可能的实施方式中，收发单元15011用于在一个载波内发送第一公共信息的信道，还用于接收第二无线网络设备发送的请求；其中，请求中携带业务的标识；
处理单元15012用于根据所述业务标识利用所述收发单元15011在前述的载波内发送第二公共信息的信道，第二公共信息的信道与所述业务相对应。
进一步的，收发单元15011还用于在前述载波内传输所述业务。
其中，具体的描述或处理单元及收发单元的功能，如第二公共信息的信道与业务相对应的情况，第一公共信息的信道为基础信道，时频资源或码字资源的配置等，可以参考本发明其他实施例中对于第一无线网络设备或是基站的描述，在此不予赘述。
可以理解的是，作为一种实现方式，收发单元的功能可以考虑通过收发电路或者收发的专用芯片实现。处理单元可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本发明实施例提供的无线接入设备。即将实现收发单元和处理单元功能的程序代码存储在存储器中，处理器通过执行存储器中的代码来实现收发单元和处理单元的功能。
可选的，该第一无线网络设备还可以包括存储器和/或总线等常见部分，在此不予赘述。
可选的，第二无线网络设备，如图17所示，包括收发单元15021和处理单元15022。该无线网络设备可以为终端，也可以为基站。
处理单元15022，用于根据所需接收的业务的特性利用收发单元15021进行公共信息的信道的接收。
在本发明实施例中的一种可能的实施方式中，处理单元可以具体用于根据所需接收的第二业务的特性利用收发单元进行第二公共信息的信道的接收。
处理单元还可以用于根据所需接收的第一业务的特性利用收发单元进行第 一公共信息的信道的接收。
其中，第一业务和第二业务在同一个载波上传输。第一公共信息的信道和第二公共信息的信道也在第一业务和第二业务所在的载波上传输。
在本发明实施例中的另一种可能的实施方式中，处理单元还可以用于根据所需接收的业务的特性利用收发单元向第一无线网络设备发送公共信息的信道的请求。
进一步的，处理单元还可以用于利用收发单元接收第一公共信息的信道。此时，公共信息的信道具体为第二公共信息的信道。
第二公共信息的信道与第二业务的特性相对应。
其中，第一公共信息的信道与前述第二公共信息的信道的帧结构不同。相关的定义、揭示和详细说明，如收发单元或处理单元的功能，公共信息的信道对应业务的情况，或是公共信息的信道的发送时机，或是资源的配置，或是其他业务的公共信息的信道共用等，可以参考本发明其他实施例对于第二无线网络设备或是UE的描述，在此不予赘述。
可选的，第二公共信息的信道与第一公共信息的信道可以是独立的，也可以是在第一公共信息的信道中增加相应业务接入所需的公共信息，如时域偏移，频域偏移或其他信息中的一项或多项，来得到第二公共信息的信道(可选的，此时第一公共信息的信道也还存在)。这点也可以参考本发明其他实施例的描述，在此不予赘述。
作为一种实现方式，收发单元的功能可以考虑通过收发电路或者收发的专用芯片实现。处理单元可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本发明实施例提供的无线接入设备。即将实现收发单元和处理单元功能的程序代码存储在存储器中，处理器通过执行存储器中的代码来实现收发单元和处理单元的功能。
可选的，该第二无线网络设备还可以包括存储器和/或总线等常见部分，在此不予赘述。
还应理解，本文中涉及的第一、第二、第三、第四以及各种数字编号仅为描述方便进行的区分，并不用来限制本发明实施例的范围。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，本文中A，B和C中的至少一种(个)或多种(个)包括A，或，B，或，C，或，A和B，或，A和C，或，B和C，或，A和B和C。同理可以推知A和B中的至少一种(个)或多种(个)，A，B，C和D中的至少一种(个)或多种(个)等两项或四项等多项中至少一种(个)的含义，在此不予赘述。
应理解，本文中由于中文语言的原因，A的B中的连接词“的”有时可以省略为AB，A对应的B有时可以省略为A的B，如无特别指出其区别，其所表达的含义指向基本一致。
应理解，本文中由于中文语言的原因，信道、信号、消息、信息有时可以指向同一个意思，如无特别指出其区别，其所表达的含义指向基本一致。
应理解，本文中由于中文语言的原因，可能还会有其他的一些词语的混用，这些混用对本领域技术人员而言都是可以理解且无疑义的，在此不予赘述。
应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程， 在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应 以所述权利要求的保护范围为准。

Claims (17)

  1. 一种数据传输的方法，其特征在于，包括：
    第一无线网络设备在同一个载波内发送至少两个公共信息信道，所述至少两个公共信息信道包括第一公共信息信道和第二公共信息信道，所述第一公共信息信道和所述第二公共信息信道在所述同一个载波的不同子频段上，所述公共信息包括同步信号、广播信号和系统消息中的至少一种。
  2. 根据权利要求1所述的方法，其特征在于，在发送至少两个公共信息信道之前，还包括：
    第一无线网络设备确定在所述同一个载波内所需传输的业务包括至少两个业务，所述至少两个业务包括所述第一业务和所述第二业务；所述第一公共信息信道对应第一业务，所述第二公共信息信道对应第二业务；第一业务的帧结构包括第一业务子载波间隔、第一业务循环前缀长度和第一业务所在的子频段；第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的子频段。
  3. 根据权利要求2所述的方法，其特征在于，所述第一业务和第二业务的帧结构不同；
    或者，第一业务和第二业务的类型不同；
    其中，所述第一业务和第二业务的帧结构不同包括：
    第一业务所在的子频段和第二业务所在的子频段不同。
  4. 根据权利要求3所述的方法，其特征在于，所述第一业务和第二业务的帧结构不同还包括：第一业务子载波间隔和第二业务子载波间隔不同且第一业务CP长度和第二业务CP长度不同；或者，第一业务子载波间隔和第二业务子载波间隔相同且第一业务CP长度和第二业务CP长度不同。
  5. 根据权利要求2至4任意一项所述的方法，其特征在于，
    第一公共信息信道的结构包括第一子载波间隔、第一循环前缀长度和第一公共信息信道所在的第一子频段；
    所述第一公共信息信道对应第一业务包括：
    (1)所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度相同；或者，所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度不同；和，
    (2)所述第一业务子频段和第一子频段相同；
    或者，所述第一公共信息信道对应第一业务包括：
    (1)所述第一业务子频段和第一子频段不同；且，
    (2)所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度相同；或，所述第一业务子载波间隔和所述第一子载波间隔相同，且所述第一业务CP长度和所述第一CP长度不同。
  6. 根据权利要求2至5任意一项所述的方法，其特征在于，
    第二公共信息信道的结构包括第二子载波间隔、第二循环前缀长度和第二公共信息信道所在的第二子频段；
    所述第二公共信息信道对应第二业务包括：
    (1)所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度相同；或者，所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度不同；和，
    (2)所述第二业务子频段和第二子频段相同；
    或者，所述第二公共信息信道对应第二业务包括：
    (1)所述第二业务子频段和第二子频段不同；和，
    (2)所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度相同；或者，所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度不同。
  7. 根据权利要求6所述的方法，其特征在于，所述至少两个业务还包括第三业务，所述第二公共信息信道还对应所述第三业务；
    其中，所述第三业务的类型与所述第二业务的类型相同，或者，
    第三业务的帧结构包括第三业务子载波间隔、第三业务循环前缀长度和第 三业务所在的第三业务子频段；第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的子频段；
    (1)所述第三业务子频段和所述第二业务子频段不同；且
    (2)所述第三业务子载波间隔和所述第二业务子载波间隔相同且第三CP长度和第二CP长度相同，或者，所述第三业务子载波间隔和所述第二业务子载波间隔相同且第三CP长度和第二CP长度不同且第三业务帧结构中一个子帧的最后一个符号和第二业务帧结构中一个子帧的最后一个符号的时域边界对齐。
  8. 一种无线网络设备，其特征在于，包括收发单元和处理单元，所述处理单元用于执行权利要求1至7任意一项所述的方法，所述收发单元在所述处理单元的控制下进行数据的接收和/或发送。
  9. 一种数据传输的方法，其特征在于，包括：
    第二无线网络设备根据所需接收的第二业务的特性进行第二公共信息信道的接收，其中，所述第二公共信息信道对应于第二业务；所述公共信息包括同步信号、广播信号和系统消息中的至少一种；
    所述第二业务的特性包括第二业务的帧结构，或，第二业务的类型，或，第二无线网络设备的类型；
    所述第二公共信息信道对应于第二业务包括：
    第二公共信息信道对应于第二业务的帧结构，或，第二业务的类型，或，第二无线网络设备的类型，其中，第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的第二业务子频段；第二公共信息信道的结构包括第二子载波间隔、第二循环前缀长度和第二公共信息信道所在的第二子频段。
  10. 根据权利要求9所述的方法，其特征在于，所述第二公共信息信道对应于第二业务的帧结构包括：
    (1)第二业务子频段和第二子频段相同；且
    (2)所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度相同；或者，所述第二业务子载波间隔和所述第二 子载波间隔相同，且所述第二业务CP长度和所述第二CP长度不同；
    或者，所述第二公共信息信道对应于第二业务的帧结构包括：
    (1)第二业务子频段和第二子频段不同，且
    (2)所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度相同；或者，所述第二业务子载波间隔和所述第二子载波间隔相同，且所述第二业务CP长度和所述第二CP长度不同。
  11. 根据权利要求9或10所述的方法，其特征在于，还包括：
    第二无线网络设备根据所需接收的第一业务的特性进行第一公共信息信道的接收，第一公共信息信道对应于第一业务；所述第一业务和所述第二业务在同一个载波上传输，第一公共信息信道和第二公共信息信道也在第一业务和第二业务所在的载波上传输。
  12. 根据权利要求11所述的方法，其特征在于，所述第一业务的特性和所述第二业务的特性不同，具体包括：
    第一业务的类型和第二业务的类型不同；或者，
    第一业务的帧结构和第二业务的帧结构不同，其中，第一业务的帧结构包括第一业务子载波间隔、第一业务循环前缀长度和第一业务所在的第一业务子频段；第二业务的帧结构包括第二业务子载波间隔、第二业务循环前缀长度和第二业务所在的第二业务子频段；第一业务的帧结构和第二业务的帧结构不同包括：第一业务子频段和第二业务子频段不同。
  13. 根据权利要求12所述的方法，其特征在于，所述第一业务的帧结构和第二业务的帧结构不同还包括：
    第一业务子载波间隔和第二业务子载波间隔不同且第一业务CP长度和第二业务CP长度不同；或者，第一业务子载波间隔和第二业务子载波间隔相同且第一业务CP长度和第二业务CP长度不同。
  14. 根据权利要求9至13任意一项所述的方法，其特征在于，还包括：
    第二无线网络设备根据所需接收的第三业务的特性进行第二公共信息信道的接收，第二公共信息信道还对应于第三业务；所述第三业务和所述第二业务 在同一个载波上传输。
  15. 根据权利要求14所述的方法，其特征在于，所述第三业务的特性包括第三业务的类型，或者，第三业务的帧结构；
    其中，第三业务的类型和第二业务的类型相同，或者，
    第三业务的帧结构包括第三业务子载波间隔、第三业务CP长度和第三业务所在的第三业务子频段，其中，第三业务子载波间隔和第二业务子载波间隔相同且第三CP长度和第二CP长度相同，或者，第三业务子载波间隔和第二业务子载波间隔相同且第三CP长度和第二CP长度不同且所述第三业务的帧结构中的一个子帧中的最后一个符号和所述第二业务的帧结构中的一个子帧中的最后一个符号的时域边界对齐。
  16. 一种终端，其特征在于，包括收发单元和处理单元；
    所述处理单元用于执行权利要求9至15任意一项所述的方法，所述收发单元在所述处理单元的控制下进行数据的接收和/或发送。
  17. 一种通信系统，其特征在于，包括如权利要求8所述的无线网络设备和如权利要求16所述的终端。
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