WO2017075822A1

WO2017075822A1 - Method for data transmission, access network device, and user equipment

Info

Publication number: WO2017075822A1
Application number: PCT/CN2015/094037
Authority: WO
Inventors: 郑娟; 吴作敏
Original assignee: 华为技术有限公司
Priority date: 2015-11-06
Filing date: 2015-11-06
Publication date: 2017-05-11

Abstract

Disclosed are a method for data transmission, an access network device, and a user equipment, for use in bearing data to be transmitted on a target time-frequency resource in a target subframe on a target frequency band, thereby improving the utilization rate of time-frequency resources in a communication network. In some practicable embodiments of the present invention, the method for data transmission comprises: an access network device determines a target subframe on a target frequency band, wherein the target frequency band is a license-free frequency band, and the downlink data transmission length of the target subframe is less than a threshold; the access network device determines, according to a preset rule, a data transmission characteristic of a target time-frequency resource in the target subframe, and bears data to be transmitted on the target time-frequency resource according to the data transmission characteristic, wherein the target time-frequency resource is the primary synchronization signal (PSS) location of the target subframe.

Description

Data transmission method, access network device and user equipment

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, an access network device, and a user equipment.

Background technique

In a wireless communication network, each device needs to use frequency resources for information transmission, and the frequency resources are also referred to as spectrum or frequency bands. The frequency band can be divided into a licensed frequency band and an unlicensed frequency band, and the unlicensed frequency band is also called an unlicensed frequency band. The licensed frequency band is a frequency resource exclusive to some operators, and the unlicensed frequency band is a common frequency resource in a wireless communication network. With the development of communication technology, the amount of information transmitted in the wireless communication network is increasing, and the use of the unlicensed band to transmit information can improve the data throughput in the wireless communication network and better meet the needs of users.

Taking Licensed-Assisted Access Using LTE (LAA-LTE) as an example, the research of LAA-LTE mainly wants to utilize Carrier Aggregation in the existing Long-term Evolution (LTE) system. , CA) configuration and structure, based on the carrier on the carrier-licensed band (referred to as the licensed carrier) for communication, configure carriers on multiple unlicensed bands (referred to as unlicensed carriers), and use licensed carriers as auxiliary Unlicensed carrier for communication. That is, the LTE device can use the licensed carrier as the primary component carrier (PCC) or the primary cell (PCell) in the CA mode, and use the unlicensed carrier as the secondary component carrier (SCC). Or a secondary cell (SCell), such that the LTE device can inherit the traditional advantages of the LTE device for wireless communication through the licensed carrier, for example, in terms of mobility, security, quality of service, and simultaneous handling of multi-user scheduling, It is also possible to reduce the load of the licensed carrier by using the unlicensed carrier to achieve the purpose of network capacity offloading. When the LAA system uses unlicensed band resources, it is subject to local regulations for the use of unlicensed bands.

The license-free target band considered by LAA-LTE is the 5 GHz unlicensed band opened by governments. The coexistence specifications include Transmit Power Control (TPC), Dynamic Frequency Selection (DFS), and channel occupied bandwidth. And listen first (Listen Before talk, LBT) and so on. For example, since 5.25 to 5.35 GHz and 5.47 to 5.725 GHz are the operating frequency bands of the global radar system, in order to avoid interference of the radar system by the wireless communication device operating in the 5 GHz band, the wireless communication device must have the functions of TPC and DFS. TPC is to prevent wireless products from transmitting excessive power to interfere with radar. DFS is to enable wireless products to actively detect the frequency used by radar, and actively select another frequency to avoid radar frequency. The channel occupancy bandwidth requirement is when wireless communication When the device works in the 5G frequency band, its occupied channel bandwidth should reach 80% to 100% of its claimed channel bandwidth. After listening, LBT is a coexistence strategy between systems. The wireless communication system needs to communicate in the unlicensed band. Use the LBT rules.

The basic idea of the LBT rule is: Before each communication device sends a signal on a certain channel, it needs to detect whether the current channel is idle, that is, whether it can detect that the nearby node is occupying the current channel transmission signal. This detection process is called idle. Clear Channel Assessment (CCA); if the channel is detected to be idle for a period of time, the communication device can use the idle channel to transmit a signal; if the channel is detected to be occupied, the communication device cannot currently use the channel. Send a signal. In the above process, whether the channel is idle or not can be implemented by signal detection, energy detection, etc., accordingly, if a specific signal is not detected, the channel can be considered idle; if energy detection is used, if it is received or detected If the energy is below a certain threshold, the channel can also be considered idle. Based on the characteristics of LBT, the data transmission of LTE devices in the unlicensed band is opportunistic, that is, discontinuous.

In order to effectively utilize the unlicensed band resources for data transmission and improve spectrum use efficiency, in the unlicensed band, the LTE system can allow time resources and frequency resources of less than one subframe (referred to as partial subframes) to be used for data transmission, as shown in the figure. As shown in FIG. 1, the length of the partial subframe is generally less than 1 ms, and the length of the complete subframe is 1 ms.

Further, for the last partial subframe, in order to reduce the design complexity, the transmission format of the last partial subframe may adopt a Downlink Pilot Time Slot (DwPTS) format, and the DwPTS is a time division duplex (Time Division) Duplexing, TDD) A structure in an LTE system that is contained within a special subframe. The frame structure of the existing TDD LTE system includes a downlink subframe, a special subframe, and an uplink subframe, as shown in FIG. 2, where two radio subframes (RFs) include two special subframes as an example. The length of the special subframe is 1 ms, that is, 1 subframe, which is composed of DwPTS, Guard Period (GP), and Uplink Pilot Time Slot. UpPTS), the TDDLTE system currently defines different special subframe configurations for the Normal Cyclic Prefix (NCP) and the Extended Cyclic Prefix (ECP), respectively, where different special sub-frames are defined. At least one of the lengths of the DwPTS, GP, and UpPTS included in the frame configuration is different, as shown in Table 1 below.

Table 1

In Table 1, the lengths of DwPTS and UpPTS are represented by the number of symbols, and the time occupied by the GP can be calculated by subtracting the time occupied by DwPTS and UpPTS by the length of one subframe (ie, 1 ms). It should be noted that the number of orthogonal frequency division multiplexing (OFDM) symbols included in the UpPTS in Table 1 is applicable not only to the case of the upper behavior NCP but also to the case of the upper behavior ECP. For example, suppose the special subframe configuration is 0. In the case of the next NCP behavior, the DwPTS includes 3 OFDM symbols, and the UpPTS includes 1 OFDM symbol for both the uplink NCP and the uplink ECP.

Further, the third OFDM symbol included in the DwPTS carries a Primary Synchronization Signal (PSS), and in frequency, the PSS is distributed in the center of the system bandwidth. The subcarrier of the 1.4MHz or system bandwidth center (Subcarrier), as shown in Figure 3, the following NCP and special subframe ratio 4 is used as an example. (For the number of symbols occupied by DwPTS/UpPTS, refer to Table 1) . In the TDD system, the main function of the PSS is to help the user equipment implement symbol timing, frequency synchronization, and the Joint Synchronization Signal (SSS) to help the user equipment to identify the identity of the cell.

Currently, for the LAA-LTE system, since data transmission on the unlicensed band is opportunistic, in order to better support cell identification and radio resource management (RRM) measurement, the user equipment can detect the reference through detection. The Signal (Discovery Reference Signal, DRS) replaces the role played by PSS. The RRM measurement here includes, but is not limited to, Reference Signal Received Power (RSRP) measurement and Reference Signal Received Quality (RSRQ) measurement.

The PSS needs to occupy the network time-frequency resources, and the role of the DRS is the same as that of the user equipment. Therefore, the time-frequency resources occupied by the PSS cause network resources to be wasted.

Summary of the invention

The embodiment of the present invention provides a data transmission method, an access network device, and a user equipment, which are used to transmit data in a target time-frequency resource in a target subframe on a target frequency band, thereby improving utilization of network time-frequency resources.

In view of this, the first aspect of the present invention provides a data transmission method, including:

The access network device determines a target subframe on the target frequency band, where the target frequency band is an unlicensed frequency band, and the downlink data transmission length of the target subframe is less than a threshold;

The access network device determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and carries the transmission data to the target time-frequency resource according to the data transmission feature, where the target The time-frequency resource is the primary synchronization signal PSS bit of the target subframe.

With reference to the first aspect of the present invention, in the first implementation manner of the first aspect of the present disclosure, after the determining, by the access network device, the target subframe on the target frequency band, the method further includes:

The access network device sends control information and/or a first reference signal to the user equipment, and the control information and/or the first reference signal is used to determine the target subframe.

With reference to the first embodiment of the first aspect of the present invention, in the second embodiment of the first aspect of the present invention, The sending, by the access network device, the control information and/or the first reference signal to the user equipment includes:

The access network device carries the first reference signal to the target time-frequency resource of the target subframe, and sends the signal to the user equipment, where the first reference signal includes at least a PSS or a secondary synchronization signal SSS. One.

With reference to the first aspect of the present invention, the first embodiment of the first aspect, or the second embodiment of the first aspect, in the third implementation manner of the first aspect of the present invention, the access network device determines the target sub-subject according to a preset rule. a data transmission feature of the target time-frequency resource in the frame, and carrying the transmission data to the target time-frequency resource according to the data transmission feature includes:

Determining, by the access network device, a data transmission feature of the target time-frequency resource according to a preset valid data bearer rule, and carrying valid data to the target time-frequency resource according to the data transmission feature, the valid data Include at least one of service data, control data, and a second reference signal, the valid data not including a PSS;

or,

The access network device determines, according to a preset indication information bearer rule, a data transmission feature of the target time-frequency resource, and carries the first indication information to the target time-frequency resource according to the data transmission feature, The first indication information is used to indicate a downlink data transmission length of the target subframe;

or,

Determining, by the access network device, the data transmission feature of the target time-frequency resource according to the preset indication information bearer rule, and carrying the second indication information to the target time-frequency resource according to the data transmission feature, The second indication information is used to indicate a length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.

A second aspect of the present invention provides a data transmission method, including:

Determining, by the user equipment, a target subframe on the target frequency band, where a downlink data transmission length of the target subframe is less than a threshold;

Determining, by the user equipment, a data transmission feature of the target time-frequency resource in the target subframe according to a preset rule, and acquiring transmission data carried by the target time-frequency resource according to the data transmission feature, the target time-frequency The resource is the primary synchronization signal PSS bit of the target subframe.

With reference to the second aspect of the present invention, in the first implementation manner of the second aspect of the present invention, the user equipment is Target sub-frames on the target frequency band include:

Determining, by the user equipment, a target subframe according to the detected control information, where the control information is used to determine the target subframe;

or,

Determining, by the user equipment, a target subframe according to the detected first reference signal, where the first reference signal is used to determine the target subframe;

or,

The user equipment determines a target subframe according to the pre-configuration information, and the pre-configuration information is used to determine the target subframe.

With reference to the first embodiment of the second aspect of the present invention, in the second implementation manner of the second aspect of the present invention, the determining, by the user equipment, the target subframe according to the detected first reference signal includes:

Determining, by the user equipment, a target subframe according to the first reference signal in the detected target time-frequency resource, where the first reference signal is carried by the target time-frequency resource, and the first reference signal includes at least a PSS or a secondary synchronization signal SSS one of the.

With reference to the second aspect of the present invention, the first embodiment of the second aspect, or the second embodiment of the second aspect, in the third implementation manner of the second aspect of the present invention, the user equipment determines the target subframe according to a preset rule. The data transmission feature of the target time-frequency resource, and acquiring the transmission data carried by the target time-frequency resource according to the data transmission feature includes:

Determining, by the user equipment, a data transmission feature in the target time-frequency resource in the target subframe according to the preset valid data bearer rule, and acquiring valid data carried by the target time-frequency resource according to the data transmission feature, The valid data includes at least one of service data, control data, and a second reference signal, the valid data not including a PSS;

or,

Determining, by the user equipment, the data transmission feature in the target time-frequency resource in the target subframe according to the preset indication information bearer rule, and acquiring the first indication of the target time-frequency resource bearer according to the data transmission feature Information, the first indication information is used to indicate a downlink data transmission length of the target subframe;

Or,

Determining, by the user equipment, a data transmission feature in the target time-frequency resource in the target subframe according to the preset indication information bearer rule, and acquiring a second indication of the target time-frequency resource bearer according to the data transmission feature And the second indication information is used to indicate a length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.

A third aspect of the present invention provides an access network device, including:

a first determining module, configured to determine a target subframe on the target frequency band, where the target frequency band is an unlicensed frequency band, and a downlink data transmission length of the target subframe is less than a threshold;

a first processing module, configured to determine, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and carry the transmission data to the target time-frequency resource according to the data transmission feature, The target time-frequency resource is the primary synchronization signal PSS bit of the target subframe.

With reference to the third aspect of the present invention, in the first implementation manner of the third aspect, the access network device further includes: a sending module;

The sending module is configured to send control information and/or a first reference signal to the user equipment, where the control information and/or the first reference signal is used to determine the target subframe.

With reference to the first embodiment of the third aspect of the present invention, in the second embodiment of the third aspect of the present invention,

The sending module is specifically configured to carry the first reference signal to the target time-frequency resource of the target subframe, and send the signal to the user equipment, where the first reference signal includes at least a PSS or a secondary synchronization signal SSS one of the.

With reference to the third aspect of the present invention, the first embodiment of the third aspect, or the second embodiment of the third aspect, in the third embodiment of the third aspect of the present invention,

The first processing module is configured to determine, according to a preset valid data bearer rule, a data transmission feature of the target time-frequency resource, and carry valid data to the target time-frequency resource according to the data transmission feature, The valid data includes at least one of service data, control data, and a second reference signal, the valid data not including a PSS;

or,

The first processing module is configured to determine a data transmission feature of the target time-frequency resource according to a preset indication information bearer rule, and carry the first indication information on the target time-frequency according to the data transmission feature. a resource, the first indication information is used to indicate downlink data transmission of the target subframe length;

or,

The first processing module is configured to determine a data transmission feature of the target time-frequency resource according to a preset indication information bearer rule, and carry the second indication information to the target time-frequency according to the data transmission feature. And the second indication information is used to indicate a length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.

A user equipment according to a fourth aspect of the present invention, comprising:

a second determining module, configured to determine a target subframe on the target frequency band, where a downlink data transmission length of the target subframe is less than a threshold;

a second processing module, configured to determine, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and acquire, according to the data transmission feature, transmission data carried by the target time-frequency resource, where The target time-frequency resource is the primary synchronization signal PSS bit of the target subframe.

With reference to the fourth aspect of the present invention, in the first embodiment of the fourth aspect of the present invention,

The second determining module is specifically configured to determine a target subframe according to the detected control information, where the control information is used to determine the target subframe;

or,

The second determining module is specifically configured to determine a target subframe according to the detected first reference signal, where the first reference signal is used to determine the target subframe;

or,

The second determining module is specifically configured to determine a target subframe according to the pre-configuration information, where the pre-configuration information is used to determine the target subframe.

With reference to the first embodiment of the fourth aspect of the present invention, in the second embodiment of the fourth aspect of the present invention,

The second determining module is configured to determine a target subframe according to the first reference signal in the detected target time-frequency resource, where the first reference signal is carried by the target time-frequency resource, and the first reference signal At least one of the PSS or the secondary synchronization signal SSS is included.

With reference to the fourth aspect of the present invention, the first embodiment of the fourth aspect, or the second embodiment of the fourth aspect, in the third embodiment of the fourth aspect of the present invention,

The second processing module is specifically configured to determine the target according to a preset valid data bearer rule. Generating a data transmission feature in the target time-frequency resource in the subframe, and acquiring valid data carried by the target time-frequency resource according to the data transmission feature, where the valid data includes service data, control data, and a second reference signal. At least one of the valid data does not include a PSS;

or,

The second processing module is configured to determine, according to a preset indication information bearer rule, a data transmission feature in a target time-frequency resource in the target subframe, and obtain the target time-frequency according to the data transmission feature. First indication information carried by the resource, where the first indication information is used to indicate a downlink data transmission length of the target subframe;

or,

The second processing module is configured to determine, according to a preset indication information bearer rule, a data transmission feature in a target time-frequency resource in the target subframe, and obtain the target time-frequency according to the data transmission feature. The second indication information carried by the resource, where the second indication information is used to indicate a length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.

It can be seen that the technical solution of the target time-frequency resource carrying data transmission in the target subframe in the target frequency band in the embodiment of the present invention achieves the following technical effects:

After determining the target subframe, the access network device determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and carries the transmission data to the target time-frequency resource according to the data transmission feature, and the user equipment determines the target subframe. Obtaining the transmission data carried by the target time-frequency resource, compared with the target time-frequency resource carrying PSS in the prior art, the target time-frequency resource is used to carry the transmission data, thereby improving the utilization of the network time-frequency resource.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments and the prior art description will be briefly described below. Obviously, the drawings in the following description are only some implementations of the present invention. For example, other drawings may be obtained from those skilled in the art without any inventive effort.

FIG. 1 is a diagram showing a complete subframe and a partial subframe in a data transmission process based on an LBT rule according to the present invention; intention;

2 is a schematic diagram of a radio frame provided by the present invention;

3 is a schematic diagram of a special subframe provided by the present invention;

4 is a schematic diagram of a data transmission burst provided by the present invention;

FIG. 5 is a schematic diagram of a method for data transmission according to an embodiment of the present invention; FIG.

6 is a schematic diagram of a method for data transmission in another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an access network device according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an access network device according to another embodiment of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of interaction between an access network device and each module of a user equipment according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is an embodiment of the invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

First, the system architecture or scenario of the application of the present invention will be briefly introduced.

The present invention is applied to a wireless communication system, particularly for an LTE system that permits band access assistance, that is, a LAA-LTE system. The LTE system with the licensed band assisted access refers to the LTE system that uses the licensed band and the unlicensed band together by CA or non-CA. specific:

The mainstream deployment scenario is a scenario where the licensed band and the unlicensed band are jointly used by the CA. The carrier included in the licensed band or the licensed band or the cell working in the licensed band is used as the primary cell, and the carrier included in the unlicensed band or the unlicensed band is included. Or a cell operating on an unlicensed band as a secondary cell, The primary cell and the secondary cell may be deployed in a common station or a non-common station, and an ideal backhaul path between the two cells.

However, the present invention is not limited to the scenario of the above-mentioned CA. Other deployment scenarios include scenarios where there is no ideal backhaul path between two cells (the primary cell and the secondary cell), such as a large backhaul delay, resulting in a situation between two cells. Unable to coordinate information quickly. In addition, it is also possible to consider a cell that is deployed independently on the unlicensed band, that is, the serving cell operating in the unlicensed band at this time can directly provide an independent access function, and does not need to assist the cell working in the licensed band.

In the present invention, both the licensed band and the unlicensed band may include one or more carriers; the licensed band and the unlicensed band may be included in the CA, and may include one or more carriers included in the licensed band and the unlicensed band included One or more carriers are used for CA.

The cell mentioned in the present invention may be a cell corresponding to the base station, and the cell may belong to the macro base station, or may belong to the base station corresponding to the small cell, and the small cell may include: a city cell, a micro cell, a pico cell, a femto cell, and the like. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services. On a carrier in an LTE system, multiple cells can work at the same frequency at the same time. In some special scenarios, the concept of a carrier and a cell in an LTE system can be considered to be equivalent. For example, in a CA scenario, when a secondary carrier is configured for a user equipment. The carrier identifier of the secondary carrier and the cell identifier of the secondary cell working in the secondary carrier (Cell Indentify, Cell ID) may be carried in the same manner. In this case, the concept of the carrier and the cell may be considered as equivalent, for example, user equipment access. One carrier is equivalent to accessing one cell.

In the present invention, the access network device is a network device, such as a base station, that has radio frame generation and/or configuration in the LTE system. The user equipment includes a relay relay and a device that can perform data communication with the base station, and is introduced in the present invention by a user equipment in a general sense.

The methods for data transmission between the access network device end and the user equipment end in the above system architecture or scenario are respectively described by using an embodiment.

Embodiment 1

Referring to FIG. 5, an embodiment of the present invention provides a data transmission method, including:

501. The access network device determines a target subframe on the target frequency band.

In the embodiment of the present invention, the target frequency band is an unlicensed frequency band, and the downlink data transmission length of the target subframe is If the threshold is smaller than the threshold, the threshold set here is used to distinguish the complete subframe from the partial subframe in the radio frame. The threshold is the complete subframe, the smaller than the threshold is the partial subframe, and the target subframe belongs to the partial subframe. The device determines the target subframe on the target frequency band according to the standards of the prior art.

502. The access network device determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and carries the transmission data to the target time-frequency resource according to the data transmission feature.

In the embodiment of the present invention, after determining the target subframe, the access network device determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, where the data transmission feature is used to indicate that the target time-frequency resource should be transmitted. Data type, according to the data transmission feature, the transmission data is carried in the target time-frequency resource, the target time-frequency resource is the PSS bit of the target subframe, and the PSS bit is in the third OFDM symbol of the target subframe, and in the frequency, the PSS bit is Within 1.4 MHz of the system bandwidth center or 72 subcarriers of the system bandwidth center, the system bandwidth center here can also be understood as the center of the target frequency band.

In the embodiment of the present invention, after determining the target subframe, the access network device determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and carries the transmission data to the target time-frequency resource according to the data transmission feature. The user equipment can obtain the transmission data carried by the target time-frequency resource. Compared with the target time-frequency resource carrying PSS in the prior art, the target time-frequency resource is used to carry the transmission data, thereby improving the utilization of the network time-frequency resource.

Optionally, in some embodiments of the present invention, after determining, by the access network device, the target subframe on the target frequency band, the method further includes:

The access network device transmits control information and/or a first reference signal to the user equipment, and the control information and/or the first reference signal is used to determine the target subframe.

In the embodiment of the present invention, the access network device sends the control information and/or the first reference signal to the user equipment, so that the user equipment can determine the target subframe according to the control information and/or the first reference signal, so that the solution is more complete.

Optionally, in some embodiments of the present invention, the sending, by the access network device, the control information and/or the first reference signal to the user equipment includes:

The access network device carries the first reference signal to the target time-frequency resource of the target subframe, and sends the signal to the user equipment, where the first reference signal includes at least one of the PSS or the secondary synchronization signal SSS.

In this embodiment, the access network device only sends the target time-frequency resource (that is, the PSS bit) of the target subframe. The first reference signal, or it can be understood that if the target subframe adopts the transmission mode of DwPTS, the PSS bit includes the PSS.

In the embodiment of the present invention, when the data transmission format of the DwPTS is used in the target subframe, the target subframe includes the PSS in the PSS bit, so that the user equipment can detect whether there is a PSS, and the target subframe can be determined, so that the implementation of the scheme is further implemented. Convenient.

Optionally, in some embodiments of the present invention, the access network device determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and carries the transmission data to the target time-frequency resource according to the data transmission feature. include:

The access network device determines the data transmission characteristics of the target time-frequency resource according to the preset valid data bearer rule, and carries the valid data to the target time-frequency resource according to the data transmission feature, where the valid data includes the service data, the control data, and the second reference. At least one of the signals, the valid data does not include the PSS;

or,

The access network device determines the data transmission feature of the target time-frequency resource according to the preset indication information bearer rule, and carries the first indication information to the target time-frequency resource according to the data transmission feature, where the first indication information is used to indicate the target subframe. Downstream data transmission length;

or,

The access network device determines the data transmission feature of the target time-frequency resource according to the preset indication information bearer rule, and carries the second indication information to the target time-frequency resource according to the data transmission feature, where the second indication information is used to indicate the access network. The length of time that the device does not have downlink data transmission after the target subframe of the target frequency band.

In the embodiment of the present invention, when the transmission data is valid data, the first indication information, or the second indication information, the access network device performs processing separately, so that the solution is more specific.

In the embodiment, a method for data transmission of a pair of access network device ends is described. The following describes a method for data transmission from a user equipment end.

Embodiment 2

Referring to FIG. 6, an embodiment of the present invention provides a data transmission method, including:

601. The user equipment determines a target subframe on the target frequency band.

In the embodiment of the present invention, the target frequency band is an unlicensed frequency band, and the downlink data transmission length of the target subframe is smaller than a threshold. The threshold set here is used to distinguish the complete subframe from the partial subframe in the wireless frame, and the threshold is complete. The frame is smaller than the threshold, and the target subframe belongs to the partial subframe. The user equipment determines the target subframe on the target frequency band according to the standard of the prior art.

602. The user equipment determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and acquires transmission data carried by the target time-frequency resource according to the data transmission feature.

In the embodiment of the present invention, after determining the target subframe, the user equipment determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, where the data transmission feature is used to indicate a transmission data type of the target time-frequency resource bearer. Obtaining transmission data carried on the target time-frequency resource according to the data transmission feature, the target time-frequency resource is the PSS bit of the target subframe, and the PSS bit is in the third OFDM symbol of the target subframe, and the PSS bit is the system bandwidth in frequency. Within the center of the 1.4MHz or 72 subcarriers of the system bandwidth center, the system bandwidth center here can also be understood as the center of the target frequency band.

In the embodiment of the present invention, after determining the target subframe, the user equipment determines a data transmission feature carried by the access network device on the target time-frequency resource in the target subframe, and acquires transmission data carried by the target time-frequency resource according to the data transmission feature. Compared with the target time-frequency resource carrying PSS in the prior art, the target time-frequency resource is used to carry the transmission data, thereby improving the utilization rate of the time-frequency resources of the communication network.

Optionally, in some embodiments of the present invention, determining, by the user equipment, the target subframe on the target frequency band includes:

Determining, by the user equipment, the target subframe according to the detected control information, where the control information is used to determine the target subframe;

or,

Determining, by the user equipment, the target subframe according to the detected first reference signal, where the first reference signal is used to determine the target subframe;

or,

The user equipment determines the target subframe according to the pre-configuration information, and the pre-configuration information is used to determine the target subframe.

In the embodiment of the present invention, the user equipment detects the control information or the first reference signal or determines the target subframe according to the preset configuration information, so that the solution is more complete.

Optionally, in some embodiments of the present invention, the user equipment is determined according to the detected first reference signal. The target sub-frames include:

The user equipment determines the target subframe according to the first reference signal in the detected target time-frequency resource, where the first reference signal is carried in the target time-frequency resource, and the first reference signal includes at least one of the PSS or the SSS.

In this embodiment, the target subframe adopts the transmission mode of the DwPTS, and the target time-frequency resource (ie, the PSS bit) of the target subframe includes the PSS, and then the user equipment detects whether there is a first reference signal (for example, PSS). Determine the target subframe.

In the embodiment of the present invention, when the data transmission format of the DwPTS is used in the target subframe, the user equipment detects whether there is a PSS, and the target subframe can be determined, so that the implementation of the scheme is more convenient.

Optionally, in some embodiments of the present invention, the user equipment determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and acquires, according to the data transmission feature, the transmission data that is carried by the target time-frequency resource, where:

The user equipment determines, according to the preset valid data bearer rule, the data transmission feature in the target time-frequency resource in the target subframe, and obtains valid data carried by the target time-frequency resource according to the data transmission feature, where the valid data includes the service data and the control data. And at least one of the second reference signals, the valid data does not include the PSS;

or,

The user equipment determines, according to the preset indication information bearer rule, the data transmission feature in the target time-frequency resource in the target subframe, and obtains the first indication information of the target time-frequency resource bearer according to the data transmission feature, where the first indication information is used. Indicates the downlink data transmission length of the target subframe;

or,

The user equipment determines, according to the preset indication information bearer rule, the data transmission feature in the target time-frequency resource in the target subframe, and obtains the second indication information of the target time-frequency resource bearer according to the data transmission feature, where the second indication information is used. Indicates the length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.

In the embodiment of the present invention, when the transmission data is valid data, the first indication information, or the second indication information, the user equipment separately obtains the transmission data, so that the solution is more specific.

It should be noted that, in the embodiment of the present invention, in addition to carrying the transmission data to the target time-frequency resource, the transmission data may be carried in a specific time-frequency resource, and the frequency included in the specific time-frequency resource. The resource is the same as the frequency resource in which the PSS bit of the primary synchronization signal is located, and the time resource included in the specific time-frequency resource may be a time resource included in the subframe in which the PSS bit of the primary synchronization signal is located.

For ease of understanding, the following describes the method of data transmission in a specific application scenario. Specifically:

The access network device takes a base station as an example. The base station establishes a communication connection with the user equipment (for example, a mobile phone), and uses the licensed frequency band and the unlicensed frequency band to perform data transmission, and the base station determines according to the service load, the time position of preempting the resource in the unlicensed frequency band, or the maximum transmission duration of a burst data. The target sub-frame on the target frequency band can also be defined in other ways. The target frequency band is the unlicensed frequency band. The downlink data transmission length of the target subframe is smaller than the threshold. The threshold set here is used to distinguish the complete subframe and part. For a subframe, a threshold is obtained as a complete subframe, and a threshold smaller than a threshold is a partial subframe, and the target subframe belongs to a partial subframe. It should be noted that for an LTE system operating in an unlicensed band, such as a LAA-LTE system, data transmission is opportunistic, and one burst of data includes a plurality of subframes, which have a complete subframe and a partial subframe. A burst of data refers to a time range in which the base station can perform data transmission through a contention mechanism (for example, an LBT mechanism) after the base station preempts the unlicensed band resources. Preferably, the target subframe is the last subframe of one burst data, or the data transmission start position of the target subframe is at the subframe boundary. As shown in FIG. 4, the first cell can be understood as a cell that performs data transmission on a target frequency band and belongs to a cell in the base station, and the fifth subframe in FIG. 4 is a target subframe.

After the base station determines the target subframe, (1) the base station sends the control information to the user equipment through the target frequency band or the non-target frequency band, and the frequency band of the non-target frequency band is different from the frequency band of the target frequency band, for example, the non-target frequency band may be the licensed frequency band. The control information may be carried in any subframe within the data transmission burst of the target frequency band, or may be carried in the subframe of the non-target frequency band. The control information may directly indicate the target subframe. In this case, the user equipment may determine the target subframe according to the control information. The control information may also indicate the downlink data transmission length of the target subframe, and the user equipment may determine the target according to the control information. The downlink data transmission length of the subframe is compared with a threshold to determine whether the target subframe is a partial subframe. The control information may be carried in a control channel of a target frequency band or a non-target frequency band, or may be carried in a data channel of a target frequency band or a non-target frequency band. The control channel includes at least one of the following: a physical downlink control channel (Physical Downlink Control Channel, PDCCH), a physical control format indicator channel (PCFICH), and physical mixing. Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH), Enhanced Physical Downlink Control Channel (EPDCCH), Physical Broadcast Channel (PBCH), or other control supported by the LTE system Data channel; the data channel includes at least one of the following: a Physical Downlink Shared Channel (PDSCH), a Physical Multicast Channel (PMCH), or other service data channel supported by the LTE system. (2) The base station transmits the first reference signal only in the target time-frequency resource (ie, the PSS bit) of the target subframe, or it can be understood that if the target subframe adopts the transmission mode of the DwPTS, the PSS bit includes the PSS. The user equipment can determine whether it is the target subframe by detecting whether the PSS bit of each subframe on the target frequency band has a PSS. Further, the user equipment may first determine whether the subframe of the base station in the target frequency band has data transmission, and when determining that the base station has data transmission in the subframe on the target frequency band (correspondingly, the corresponding base station preempts the subframe in the target frequency band) The unlicensed band resource is further checked whether the PSS bit of the subframe includes the PSS. If the PSS is included, the subframe is the target subframe. The user equipment determines whether the base station has data transmission in the subframe of the target frequency band, and may be implemented by the base station transmitting the indication information, or may be implemented by the user equipment blind detection, for example, detecting whether each subframe on the target frequency band includes the cell-specific reference signal (Cell -Specific Reference Signal (CRS), if the CRS is included, it can be determined that the base station has data transmission in the subframe of the target frequency band, and the user equipment determines whether the base station has data transmission in the subframe of the target frequency band, and can be implemented by other means, Make specific limits. It should be noted that the first reference signal can also be used to indicate the data transmission length of the target subframe.

The base station determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, where the preset rule is common to the base station and the user equipment, and the preset rule may be a valid data bearer rule and an indication information bearer rule, and data transmission The feature is used to indicate the type of transmission data that the target time-frequency resource should carry. The transmission data has three types, namely: valid data, first indication information, and second indication information. The valid data includes at least one of service data, control data, and a second reference signal, where the service data includes data carried by at least one of the following channels: PDSCH, PMCH, or other service data channel supported by the LTE system; and the control data includes the following: Data carried by at least one channel: PDCCH, PCFICH, PHICH, EPDCCH, PBC, or other control data channel supported by the LTE system; the second reference signal includes at least one of the following: CRS, multimedia broadcast multicast service, single frequency network reference letter (Multimedia Broadcast multicast service Single Frequency Network Reference Signal, MBSFN RS), UE-specific Reference Signal (DM-RS) for PDSCH, DeModulation Reference Signal for EPDCCH (DeModulation Reference Signal, DM-RS), Positioning Reference Signal (PRS), Channel State Information Reference Signal (CSI-RS) or Discovery Reference Signal (DRS), it should be noted that In the embodiment of the present invention, any signal included in the DRS may be referred to as DRS, which is distinguished from the prior art, and the PSS is not included in the valid data. The first indication information is used to indicate a downlink data transmission length of the target subframe. The second indication information is used to indicate the length of time that the base station does not have downlink data transmission after the target subframe of the target frequency band, that is, the user equipment does not need to detect downlink data transmission of the unlicensed frequency band within this time length. It should be noted that the first indication information and the second indication information may be implemented by means of signaling, or may be implemented by means of sequence detection, and are not specifically limited.

The base station carries the transmission data to the target time-frequency resource (that is, the PSS bit) according to the data transmission feature. It should be noted that the base station may also carry the transmission data on the signal composed of the sequence or the sequence, and then the signal composed of the sequence or the sequence. The base station and the user equipment are pre-agreed, and one sequence form corresponds to one downlink data length of the target subframe, and the user equipment is based on the detected sequence or sequence. The sequence form of the composed signal determines the downlink data transmission length of the target subframe. For example, the sequence uses the sequence that constitutes the PSS, that is, the Zadoff-Chu sequence, which is referred to as the ZC sequence. According to the different root sequence index of the ZC sequence, the PSS has three performances. Form, so PSS can be used to represent three different data transmission lengths in three different sequence forms. Correspondingly, the user equipment needs to perform the step of decoding the signal composed of the sequence or sequence. In addition, in a specific case, the target subframe is a partial subframe and uses the data transmission format of the DwPTS, then the target subframe includes the PSS in the PSS bit itself, and the complete subframe does not include the PSS, so the user equipment only needs to If the current subframe of the target frequency band detects the PSS, the current subframe may be determined as the target subframe. In this case, the user equipment determines the target in the target subframe according to a preset rule. The data transmission feature of the time-frequency resource may include: the user equipment determining a target time-frequency resource carrying PSS of the target subframe. Further, the downlink data transmission length of the target subframe may also be determined according to a sequence form constituting the PSS.

The user terminal may determine the target subframe according to the pre-configuration information, and the pre-configuration information indicates that the access network device is in the target frequency band, in addition to determining the target subframe on the target frequency band according to the detected control information and/or the first reference signal. The maximum time for transmitting data on the maximum time is the maximum time range for a data transmission burst of the access network device on the target frequency band. For example, in Japan, for the use of unlicensed bands, the regulations clearly define a maximum data transmission time of 4 ms; in addition, in Europe, for the use of unlicensed bands, the regulations clearly define a maximum data transmission time of 10 ms or 13 ms or 8 ms. The user equipment can determine the target subframe by considering the pre-configuration information in the target frequency band by determining the starting position of a data transmission burst.

After determining the target subframe, the user equipment determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and acquires transmission data carried by the target time-frequency resource according to the data transmission feature, and the operation performed by the base station may be performed. It is known that the user equipment determines the transmission data type of the transmission data in the target time-frequency resource according to the preset valid data bearer rule or the indication information bearer rule, so as to perform corresponding operations for different data types to obtain the transmission data, if the data is transmitted. If it is carried on a signal composed of a sequence or a sequence, it is also necessary to decode the signal composed of the sequence or the sequence to obtain the transmission data.

When the transmission data is the first indication information, the user equipment obtains the first indication information to determine the downlink data transmission length of the target subframe, which is beneficial to the user equipment to accurately demodulate the data and perform channel quality measurement on the target frequency band, for example, Measurement of Channel State Information (CSI).

When the transmission data is the second indication information, the user equipment may obtain the second indication information to determine the length of time that the base station does not have downlink data transmission after the target subframe of the target frequency band, and for the LBT rule, the detection of the user equipment may be reduced. The number of times avoids the detection of the unlicensed band in the time range in which the downlink data transmission is impossible, and can save power. It should be noted that the user equipment can implement one or more carriers in the unlicensed band. The downlink data detection is stopped, and the downlink data detection for which carriers are stopped can be notified to the user equipment by the base station.

That is to say, the information content carried by the first indication information and the second indication information may be valid through one carrier on the unlicensed frequency band, or may be valid for multiple carriers, and is not specifically limited.

When the transmission data is valid data, the target time-frequency resource bearer of the target subframe is used in the prior art. Compared with PSS, the target time-frequency resource carries valid data, which improves the utilization of network time-frequency resources.

It should be noted that the transmission data may also be other data types, and the specific type is not limited herein.

In summary, compared with the prior art, regardless of whether the transmission data is valid data, first indication information, or second indication information, the PSS bits in the target subframe are used to carry transmission data, and the use of network time-frequency resources is utilized. It is beneficial.

The foregoing embodiment describes a method for data transmission. The following embodiments respectively describe an access network device and a user equipment.

Embodiment 3

Referring to FIG. 7, an embodiment of the present invention provides an access network device, including:

The first determining module 701 is configured to determine a target subframe on the target frequency band, where the target frequency band is an unlicensed frequency band, and the downlink data transmission length of the target subframe is less than a threshold;

The first processing module 702 is configured to determine, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and carry the transmission data to the target time-frequency resource according to the data transmission feature, where the target time-frequency resource is the target The PSS bit of the frame.

In the embodiment of the present invention, after the first determining module 701 determines the target subframe, the first processing module 702 determines the data transmission feature of the target time-frequency resource in the target subframe according to the preset rule, and transmits the data bearer according to the data transmission feature. The target time-frequency resource enables the user equipment to obtain the transmission data carried by the target time-frequency resource. Compared with the target time-frequency resource-bearing PSS in the prior art, the target time-frequency resource is used to carry the transmission data, and the time-frequency of the communication network is improved. Utilization of resources.

Optionally, as shown in FIG. 8, in some embodiments of the present invention, the access network device further includes: a sending module 801;

The sending module 801 is configured to send control information and/or a first reference signal to the user equipment, where the control information and/or the first reference signal is used to determine a target subframe.

Optionally, as shown in FIG. 8, in some embodiments of the present invention,

The sending module 801 is specifically configured to carry the first reference signal to the target time-frequency resource of the target subframe, and send the signal to the user equipment, where the first reference signal includes at least one of a PSS or an SSS.

Optionally, in some embodiments of the present invention,

The first processing module 602 is specifically configured to determine, according to a preset valid data bearer rule, a data transmission feature of the target time-frequency resource, and carry the valid data to the target time-frequency resource according to the data transmission feature, where the valid data includes the service data and the control At least one of data and a second reference signal, the valid data does not include the PSS;

or,

The first processing module 602 is specifically configured to determine a data transmission feature of the target time-frequency resource according to the preset indication information bearer rule, and carry the first indication information to the target time-frequency resource according to the data transmission feature, where the first indication information is used. The downlink data transmission length indicating the target subframe;

or,

The first processing module 602 is specifically configured to determine a data transmission feature of the target time-frequency resource according to the preset indication information bearer rule, and carry the second indication information to the target time-frequency resource according to the data transmission feature, where the second indication information is used. The length of time for indicating that the access network device does not have downlink data transmission after the target subframe of the target frequency band.

The third embodiment describes the access network device, and the user equipment is described below.

Implementation IV.

Referring to FIG. 9, an embodiment of the present invention provides a user equipment, including:

The second determining module 901 is configured to determine a target subframe on the target frequency band, where a downlink data transmission length of the target subframe is less than a threshold;

The second processing module 902 is configured to determine, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and obtain transmission data carried by the target time-frequency resource according to the data transmission feature, where the target time-frequency resource is the target The PSS bit of the frame.

In the embodiment of the present invention, after the second determining module 901 determines the target subframe, the second processing module 902 determines a data transmission feature carried by the access network device on the target time-frequency resource in the target subframe, and acquires the target according to the data transmission feature. The transmission data carried by the time-frequency resource is compared with the target time-frequency resource carrying PSS in the prior art, and the target time-frequency resource is used to carry the transmission data, thereby improving the utilization rate of the time-frequency resource of the communication network.

Optionally, in some embodiments of the present invention,

The second determining module 801 is specifically configured to determine a target subframe according to the detected control information, where the control information is used to determine the target subframe.

or,

The second determining module 801 is specifically configured to determine a target subframe according to the detected first reference signal, where the first reference signal is used to determine the target subframe;

or,

The second determining module 801 is specifically configured to determine a target subframe according to the pre-configuration information, where the pre-configuration information is used to determine the target subframe.

Optionally, in some embodiments of the present invention,

The second determining module 801 is specifically configured to determine, according to the first reference signal in the detected target time-frequency resource, the target subframe, where the first reference signal is carried in the target time-frequency resource, and the first reference signal includes at least the PSS or the secondary synchronization signal. One of the SSS.

Optionally, in some embodiments of the present invention,

The second processing module 802 is specifically configured to determine, according to the preset valid data bearer rule, a data transmission feature in the target time-frequency resource in the target subframe, and obtain valid data carried by the target time-frequency resource according to the data transmission feature, which is effective. The data includes at least one of service data, control data, and a second reference signal, and the valid data does not include the PSS;

or,

The second processing module 802 is specifically configured to determine, according to the preset indication information bearer rule, a data transmission feature in the target time-frequency resource in the target subframe, and obtain the first indication information of the target time-frequency resource bearer according to the data transmission feature. The first indication information is used to indicate a downlink data transmission length of the target subframe.

or,

The second processing module 802 is specifically configured to determine, according to the preset indication information bearer rule, a data transmission feature in the target time-frequency resource in the target subframe, and obtain a second indication information of the target time-frequency resource bearer according to the data transmission feature. The second indication information is used to indicate a length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.

The interaction process between the access network device and the modules of the user equipment in the embodiment of the present invention is described in detail in a specific implementation manner:

The access network device takes a base station as an example. As shown in FIG. 10, the base station establishes a communication connection with the user equipment (for example, a mobile phone), and performs data transmission by using the licensed frequency band and the unlicensed frequency band, and the first determining module 701 of the base station preempts the resource in the unlicensed frequency band according to the service load. The location or the maximum transmission duration of a burst of data, and the target subframe on the target frequency band may be determined by other methods without specific limitation. The target frequency band is an unlicensed frequency band, and the downlink data transmission length of the target subframe is less than a threshold. The threshold set is used to distinguish between a complete subframe and a partial subframe. A threshold is obtained as a complete subframe, and a threshold smaller than a threshold is a partial subframe, and the target subframe belongs to a partial subframe. It should be noted that for an LTE system operating in an unlicensed band, such as a LAA-LTE system, data transmission is opportunistic, and one burst of data includes a plurality of subframes, which have a complete subframe and a partial subframe. A burst of data refers to a time range in which the base station can perform data transmission through a contention mechanism (for example, an LBT mechanism) after the base station preempts the unlicensed band resources. Preferably, the target subframe is the last subframe of one burst data, or the data transmission start position of the target subframe is at the subframe boundary. As shown in FIG. 4, the first cell can be understood as a cell that performs data transmission on a target frequency band and belongs to a cell in the base station, and the fifth subframe in FIG. 4 is a target subframe.

After the first determining module 701 determines the target subframe, (1) the sending module 801 sends the control information to the user equipment through the target frequency band or the non-target frequency band, and the frequency band of the non-target frequency band is different from the frequency band of the target frequency band, for example, the non-target frequency band may be Is the licensed band. The control information may be carried in any subframe within the data transmission burst of the target frequency band, or may be carried in the subframe of the non-target frequency band. The control information may directly indicate the target subframe. In this case, the second determining module 901 of the user equipment may determine the target subframe according to the control information; the control information may also indicate the downlink data transmission length of the target subframe, and the second determination The module 901 can determine the downlink data transmission length of the target subframe according to the control information, and compare with the threshold to determine whether the target subframe is a partial subframe. The control information may be carried in a control channel of a target frequency band or a non-target frequency band, or may be carried in a data channel of a target frequency band or a non-target frequency band. The control channel includes at least one of: PDCCH, PCFICH, PHICH, EPDCCH, PBCH, or other control data channel supported by the LTE system; the data channel includes at least one of the following: PDSCH, PMCH, or other service data supported by the LTE system. channel. (b), The sending module 801 only sends the first reference signal in the target time-frequency resource (ie, PSS bit) of the target subframe, or it can be understood that if the target subframe adopts the transmission mode of the DwPTS, the PSS bit includes the PSS. The second determining module 901 may determine whether the target subframe is a target station by detecting whether the PSS bit of each subframe on the target frequency band has a PSS. Further, the second determining module 901 may first determine whether the subframe of the base station in the target frequency band has data transmission, and when determining that the base station has data transmission in the subframe on the target frequency band (correspondingly, the corresponding base station is in the target frequency band) The frame is preempted to the unlicensed band resource, and then the PSS bit of the subframe is detected to include the PSS. If the PSS is included, the subframe is the target subframe. The second determining module 901 determines whether the base station has data transmission in the subframe of the target frequency band, and may be implemented by the sending module 801 to send the indication information, or may be implemented by the second determining module 901, for example, detecting each subframe on the target frequency band. Whether the CRS is included, if the CRS is included, it can be determined that the base station has data transmission in the subframe of the target frequency band, and the second determining module 901 determines whether the base station has data transmission in the subframe of the target frequency band, and can be implemented by other means, and does not do Specifically limited. It should be noted that the first reference signal can also be used to indicate the downlink data transmission length of the target subframe.

The second processing module 902 determines the data transmission feature of the target time-frequency resource in the target subframe according to the preset rule. The preset rule is common to the base station and the user equipment, and the preset rule may be a valid data bearer rule and an indication information bearer. The data transmission feature is used to indicate the type of transmission data that the target time-frequency resource should carry. The transmission data has three types, namely: valid data, first indication information, and second indication information. The valid data includes at least one of service data, control data, and a second reference signal, where the service data includes data carried by at least one of the following channels: PDSCH, PMCH, or other service data channel supported by the LTE system; and the control data includes the following: Data carried by at least one channel: PDCCH, PCFICH, PHICH, EPDCCH, PBC or other control data channel supported by the LTE system; the second reference signal includes at least one of the following: CRS, multimedia broadcast multicast service single frequency network reference signal (Multimedia Broadcast multicast service Single Frequency Network Reference Signal (MBSFN RS), UE-specific Reference Signal (DM-RS) for PDSCH, DeModulation Reference Signal (DM-RS) for EPDCCH ), Positioning Reference Signal (PRS), Channel State Information Reference Signal (CSI-RS), or Discovery Reference Signal (DRS), It should be noted that, in the embodiment of the present invention, any signal included in the DRS may be referred to as DRS, which is distinguished from the prior art, and the PSS is not included in the valid data. The first indication information is used to indicate a downlink data transmission length of the target subframe. The second indication information is used to indicate the length of time that the base station does not have downlink data transmission after the target subframe of the target frequency band, that is, the user equipment does not need to detect downlink data transmission of the unlicensed frequency band within this time length. It should be noted that the first indication information and the second indication information may be implemented by means of signaling, or may be implemented by means of sequence detection, and are not specifically limited.

The first processing module 702 carries the transmission data to the target time-frequency resource (ie, the PSS bit) according to the data transmission feature. It should be noted that the first processing module 702 can also carry the transmission data on the signal composed of the sequence or sequence, and then The sequence or the sequence of the signal is carried in the target time-frequency resource. Since the sequence form is well-known by the base station and the user equipment, the base station and the user equipment pre-agreed, and one sequence form corresponds to a downlink data length of the target subframe. The user equipment determines the downlink data transmission length of the target subframe according to the sequence of the detected sequence or sequence signal. For example, the sequence uses a sequence that constitutes a PSS, that is, a Zadoff-Chu sequence, which is referred to as a ZC sequence, and a root according to the ZC sequence. Sequence indexing, PSS has three manifestations, so three different sequence lengths of PSS signals can be used to represent three different data transmission lengths. Correspondingly, the second processing module 902 needs to perform the step of decoding a signal composed of a sequence or a sequence. In addition, in a specific case, the target subframe is a partial subframe and uses the data transmission format of the DwPTS, then the target subframe includes the PSS in the PSS bit itself, and the complete subframe does not include the PSS, so the second processing module 902, as long as the PSS is detected in the current subframe of the target frequency band, the current subframe may be determined as the target subframe, and further, the downlink data transmission length of the target subframe may be determined according to the sequence form constituting the PSS.

The second determining module 901 may determine the target subframe according to the pre-configuration information, and the pre-configuration information indicates the access network device, in addition to determining the target subframe on the target frequency band according to the detected control information and/or the first reference signal. The maximum time for transmitting data on the target frequency band, which is the maximum time range of a data transmission burst of the access network device on the target frequency band. For example, in Japan, for the use of unlicensed bands, the regulations clearly define a maximum data transmission time of 4 ms; in addition, in Europe, for the use of unlicensed bands, the regulations clearly define a maximum data transmission time of 10 ms or 13 ms or 8 ms. The second determining module 901 can determine the target subframe by considering the pre-configuration information in the target frequency band by determining the starting position of a data transmission burst.

After the second determining module 901 determines the target subframe, the second processing module 902 determines the data transmission feature of the target time-frequency resource in the target subframe according to the preset rule, and acquires the transmission data of the target time-frequency resource according to the data transmission feature. The second processing module 902 determines the transmission data type of the transmission data in the target time-frequency resource according to the preset effective data bearer rule or the indication information bearer rule, so as to be different for the operation performed by the first processing module 901. The data type performs the corresponding operation to obtain the transmission data. If the transmission data is carried on the signal composed of the sequence or the sequence, the signal composed of the sequence or the sequence needs to be decoded to obtain the transmission data.

When the transmission data is the first indication information, the second processing module 902 can obtain the downlink data transmission length of the target subframe by acquiring the first indication information, which is beneficial to the user equipment to accurately demodulate the data and perform channel quality measurement on the target frequency band. For example, measurement of CSI is performed.

When the transmission data is the second indication information, the second processing module 902 obtains the second indication information to determine the length of time that the base station does not have downlink data transmission after the target subframe of the target frequency band, and for the LBT rule, the user can be reduced. The number of detections of the device avoids the detection of the unlicensed frequency band in the time range in which the downlink data transmission is impossible, and can save power. It should be noted that the user equipment can implement one of the unlicensed frequency bands or Multiple carriers stop downlink data detection. Specifically, which carriers stop downlink data detection can be notified to the user equipment by the base station.

When the transmission data is valid data, compared with the target time-frequency resource carrying PSS of the target subframe in the prior art, the target time-frequency resource carries valid data, which improves the utilization of the network time-frequency resource.

It should be noted that, for the foregoing method embodiments, for the sake of brevity, they are all described as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence, because In accordance with the present invention, certain steps may be performed in other sequences or concurrently. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

A person skilled in the art may understand that all or part of the various steps of the foregoing embodiments may be performed by a program to instruct related hardware. The program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, disk or CD.

The data transmission method, the access network device, and the user equipment provided by the embodiments of the present invention are described in detail. The principles and implementation manners of the present invention are described in the specific examples. The description of the above embodiments is only used. To help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and application scopes. The content should not be construed as limiting the invention.

Claims

A method for data transmission, comprising:

The access network device determines a target subframe on the target frequency band, where the target frequency band is an unlicensed frequency band, and the downlink data transmission length of the target subframe is less than a threshold;

The access network device determines, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and carries the transmission data to the target time-frequency resource according to the data transmission feature, where the target The time-frequency resource is the primary synchronization signal PSS bit of the target subframe.
The method according to claim 1, wherein after the access network device determines the target subframe on the target frequency band, the method further includes:

The access network device sends control information and/or a first reference signal to the user equipment, and the control information and/or the first reference signal is used to determine the target subframe.
The method according to claim 2, wherein the sending, by the access network device, the control information and/or the first reference signal to the user equipment comprises:

The access network device carries the first reference signal to the target time-frequency resource of the target subframe, and sends the signal to the user equipment, where the first reference signal includes at least a PSS or a secondary synchronization signal SSS. One.
The method according to any one of claims 1 to 3, wherein the access network device determines, according to a preset rule, a data transmission characteristic of a target time-frequency resource in the target subframe, and according to the The data transmission feature carries the transmission data to the target time-frequency resource, including:

Determining, by the access network device, a data transmission feature of the target time-frequency resource according to a preset valid data bearer rule, and carrying valid data to the target time-frequency resource according to the data transmission feature, the valid data Include at least one of service data, control data, and a second reference signal, the valid data not including a PSS;

or,

The access network device determines, according to a preset indication information bearer rule, a data transmission feature of the target time-frequency resource, and carries the first indication information to the target time-frequency resource according to the data transmission feature, The first indication information is used to indicate a downlink data transmission length of the target subframe;

Or,

Determining, by the access network device, the data transmission feature of the target time-frequency resource according to the preset indication information bearer rule, and carrying the second indication information to the target time-frequency resource according to the data transmission feature, The second indication information is used to indicate a length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.
A method for data transmission, comprising:

Determining, by the user equipment, a target subframe on the target frequency band, where a downlink data transmission length of the target subframe is less than a threshold;

Determining, by the user equipment, a data transmission feature of the target time-frequency resource in the target subframe according to a preset rule, and acquiring transmission data carried by the target time-frequency resource according to the data transmission feature, the target time-frequency The resource is the primary synchronization signal PSS bit of the target subframe.
The method according to claim 5, wherein the determining, by the user equipment, the target subframe on the target frequency band comprises:

Determining, by the user equipment, a target subframe according to the detected control information, where the control information is used to determine the target subframe;

or,

Determining, by the user equipment, a target subframe according to the detected first reference signal, where the first reference signal is used to determine the target subframe;

or,

The user equipment determines a target subframe according to the pre-configuration information, and the pre-configuration information is used to determine the target subframe.
The method according to claim 6, wherein the determining, by the user equipment, the target subframe according to the detected first reference signal comprises:

Determining, by the user equipment, a target subframe according to the first reference signal in the detected target time-frequency resource, where the first reference signal is carried by the target time-frequency resource, and the first reference signal includes at least a PSS or a secondary synchronization signal SSS one of the.
The method according to any one of claims 5 to 6, wherein the user equipment determines a data transmission characteristic of a target time-frequency resource in the target subframe according to a preset rule, and according to the data The transmission feature acquires the transmission data carried by the target time-frequency resource, including:

Determining, by the user equipment, a data transmission feature in the target time-frequency resource in the target subframe according to the preset valid data bearer rule, and acquiring valid data carried by the target time-frequency resource according to the data transmission feature, The valid data includes at least one of service data, control data, and a second reference signal, the valid data not including a PSS;

or,

Determining, by the user equipment, the data transmission feature in the target time-frequency resource in the target subframe according to the preset indication information bearer rule, and acquiring the first indication of the target time-frequency resource bearer according to the data transmission feature Information, the first indication information is used to indicate a downlink data transmission length of the target subframe;

or,

Determining, by the user equipment, a data transmission feature in the target time-frequency resource in the target subframe according to the preset indication information bearer rule, and acquiring a second indication of the target time-frequency resource bearer according to the data transmission feature And the second indication information is used to indicate a length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.
An access network device, comprising:

a first determining module, configured to determine a target subframe on the target frequency band, where the target frequency band is an unlicensed frequency band, and a downlink data transmission length of the target subframe is less than a threshold;

a first processing module, configured to determine, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and carry the transmission data to the target time-frequency resource according to the data transmission feature, The target time-frequency resource is the primary synchronization signal PSS bit of the target subframe.
The access network device according to claim 9, wherein the access network device further comprises: a sending module;

The sending module is configured to send control information and/or a first reference signal to the user equipment, where the control information and/or the first reference signal is used to determine the target subframe.
The access network device according to claim 10, characterized in that

The sending module is specifically configured to carry the first reference signal to the target time-frequency resource of the target subframe, and send the signal to the user equipment, where the first reference signal includes at least a PSS or a secondary synchronization signal SSS one of the.
An access network device according to any one of claims 9 to 11, characterized in that

The first processing module is configured to determine, according to a preset valid data bearer rule, a data transmission feature of the target time-frequency resource, and carry valid data to the target time-frequency resource according to the data transmission feature, The valid data includes at least one of service data, control data, and a second reference signal, the valid data not including a PSS;

or,

The first processing module is configured to determine a data transmission feature of the target time-frequency resource according to a preset indication information bearer rule, and carry the first indication information on the target time-frequency according to the data transmission feature. The first indication information is used to indicate a downlink data transmission length of the target subframe;

or,

The first processing module is configured to determine a data transmission feature of the target time-frequency resource according to a preset indication information bearer rule, and carry the second indication information to the target time-frequency according to the data transmission feature. And the second indication information is used to indicate a length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.
A user equipment, comprising:

a second determining module, configured to determine a target subframe on the target frequency band, where a downlink data transmission length of the target subframe is less than a threshold;

a second processing module, configured to determine, according to a preset rule, a data transmission feature of the target time-frequency resource in the target subframe, and acquire, according to the data transmission feature, transmission data carried by the target time-frequency resource, where The target time-frequency resource is the primary synchronization signal PSS bit of the target subframe.
The user equipment according to claim 13, wherein

The second determining module is specifically configured to determine a target subframe according to the detected control information, where the control information is used to determine the target subframe;

or,

The second determining module is specifically configured to determine a target subframe according to the detected first reference signal, where the first reference signal is used to determine the target subframe;

Or,

The second determining module is specifically configured to determine a target subframe according to the pre-configuration information, where the pre-configuration information is used to determine the target subframe.
The user equipment according to claim 13, wherein

The second determining module is configured to determine a target subframe according to the first reference signal in the detected target time-frequency resource, where the first reference signal is carried by the target time-frequency resource, and the first reference signal At least one of the PSS or the secondary synchronization signal SSS is included.
User equipment according to any one of claims 13 to 15, characterized in that

The second processing module is configured to determine, according to a preset valid data bearer rule, a data transmission feature in a target time-frequency resource in the target subframe, and obtain the target time-frequency according to the data transmission feature. The valid data carried by the resource, the valid data comprising at least one of service data, control data and a second reference signal, the valid data does not include a PSS;

or,

The second processing module is configured to determine, according to a preset indication information bearer rule, a data transmission feature in a target time-frequency resource in the target subframe, and obtain the target time-frequency according to the data transmission feature. First indication information carried by the resource, where the first indication information is used to indicate a downlink data transmission length of the target subframe;

or,

The second processing module is configured to determine, according to a preset indication information bearer rule, a data transmission feature in a target time-frequency resource in the target subframe, and obtain the target time-frequency according to the data transmission feature. The second indication information carried by the resource, where the second indication information is used to indicate a length of time that the access network device does not have downlink data transmission after the target subframe of the target frequency band.