CN106385711B - A method and device for uplink transmission based on unlicensed frequency band - Google Patents

Abstract

The present invention relates to the field of wireless communication, in particular to an uplink transmission method and device based on an unlicensed frequency band. The method is that, on an unlicensed frequency band, when a UE competes for an uplink transmission opportunity, HII‑RS detection is performed to determine whether it is the same source UE occupation, if it is determined that there is HII‑RS on the occupied channel, it means that there are other UEs with the same source as the UE on the channel, then the UE can obtain an uplink transmission opportunity on the channel, that is, multiple UEs can use time division multiplexing Technology and/or frequency division multiplexing technology multiplexes the same uplink subframe on the unlicensed frequency band for uplink transmission, thus improving LAA uplink transmission efficiency and system throughput, while using time-frequency multiplexing technology, it will inherit the existing The advantages of LTE uplink transmission technology on the licensed frequency band improve resource utilization and anti-interference ability of sending data.

Description

A method and device for uplink transmission based on unlicensed frequency band

technical field

The present invention relates to the field of wireless communication, in particular to an uplink transmission method and device based on an unlicensed frequency band.

Background technique

With the rapid growth of data traffic in the mobile Internet, the use of Long Term Evolution (LTE) technology in unlicensed frequency bands has received extensive attention. The unlicensed frequency band has no restrictions on all radio access technologies (Radio Access Technologies, RAT) and all operators, but there is usually no interference coordination planning between different RATs or different operators of the same RAT, so it is very These sites are not allowed to transmit services at the same time on the licensed frequency band, otherwise strong mutual interference will be caused. Therefore, in order to ensure fair, orderly and non-conflicting competition between different RATs or the same RAT belonging to different operators to use unlicensed frequency bands , when the RAT device transmits data, it is necessary to follow the Listen Before Talk (LBT) mechanism, that is, before each data transmission, a period of time is reserved for carrier sensing and clear channel assessment (Clear Channel) Assessment (CAA) process, to judge whether there is an interference source on the channel, when it senses that there is no interference source on the carrier, that is, the carrier is available, and then start data transmission, and each data transmission has a maximum duration limit.

Currently, the LTE technology is generally used in an unlicensed frequency band by means of carrier aggregation (Carrier Aggregation, CA) or dual connectivity. For the CA method, the carrier on the licensed frequency band is used as the main carrier, and the carrier on the unlicensed frequency band is used as the auxiliary carrier to realize the unlicensed frequency band access method assisted by the licensed frequency band, which is called Licensed Assisted Access (Licensed Assisted Access, LAA). Also for the LAA uplink (Uplink, UL) service, the LAA device does not do interference coordination planning on the unlicensed frequency band, so the LAA device needs to follow the LBT mechanism when transmitting services. However, an important technical guarantee for the UL transmission efficiency of the LTE system is that in the LTE system, multiple LAA devices belonging to the same operator can be dispatched by Orthogonal Frequency Division Multiplexing (OFDM) under the unified scheduling of the base station (Evolved Node Base, eNB). Use (Orthogonal Frequency Division Multiplexing, OFDM) technology to use UL resources on the same UL subframe.

In the existing technology, the LBT mechanism cannot determine where the interference source comes from, so all interference sources are treated equally. As long as the channel is perceived to be occupied, the channel cannot be used, so that only one LAA device can compete for the channel at a time. access opportunities.

For example, assuming that there is only one eNB and three LAA devices (hereinafter referred to as UEs) competing to use the channel in the channel, the specific operation process of the channel competition based on the existing technology is as follows:

Through the scheduling of eNB, UE1 and UE2 do UL transmission on subframe n, then UE1 and UE2 start to compete for channel access opportunities on subframe n-1, assuming that the random initialization CCA waiting time obtained by UE1 is longer than the CAA waiting time of UE2 If the time is short, UE1 will first obtain the channel access opportunity, and immediately send the occupancy signal until the boundary of subframe n, and then UE1 will send UL data on subframe n;

In this way, for UE2, since UE1 sends an occupancy signal on subframe n-1, UE2 will think that there is an interference source and the channel is unavailable, so it will give up sending UL data on subframe n, which will result in The UL data and corresponding scheduling information reserved by the eNB on n are wasted;

Subsequently, through eNB scheduling, UE1 and UE3 perform UL transmission on subframe n+1, and UE3 competes for channel access opportunities on subframe n. Since UE1 has already occupied subframe n, UE3 thinks that there is an interference source. If the channel is unavailable, the sending of UL data on subframe n+1 is abandoned, which will cause the UL data and corresponding scheduling information reserved by the eNB for subframe n+1 to be wasted.

It can be seen that in the prior art, when the CAA process is performed in the LBT mechanism, as long as the channel is perceived to be occupied, the channel cannot be used, and if there is an interference source, it is impossible to determine where the interference source comes from. Therefore, each time Only one LAA device is allowed to compete for channel access opportunities, so multiple LAA devices from the same operator cannot use their resources on the same UL subframe through OFDM technology under the unified scheduling of the eNB. This will affect the UL transmission efficiency of the LAA device.

Contents of the invention

Embodiments of the present invention provide an uplink transmission method and device based on an unlicensed frequency band, so as to improve uplink transmission efficiency of LAA equipment.

The specific technical scheme that the embodiment of the present invention provides is as follows:

An uplink transmission method based on an unlicensed frequency band, comprising:

The first UE determines that the eNB is a subframe n scheduled by the first UE, and the above subframe n works in an unlicensed frequency band of the first UE and is used to transmit uplink data;

When arriving at the channel competition subframe corresponding to subframe n, the first UE performs HII-RS detection; wherein, the channel competition subframe is subframe n-1 or subframe n;

The first UE determines that there is an identifiable HII-RS, and determines that the channel competition subframe has been occupied by another UE of the same origin as the first UE, and then occupies subframe n to send uplink data.

In the embodiment of the present invention, on the unlicensed frequency band, the first UE is determined to be scheduled by the eNB in subframe n, and the HII-RS detection is performed on the channel competition subframe to determine whether it is occupied by a UE of the same source, and if it is determined to be occupied If there is an HII-RS on the channel of the channel, it means that there are other UEs with the same source as the UE on the channel, and then the UE can send uplink data on the subframe n, that is, multiple UEs can use the OFDM technology to multiplex the same unlicensed frequency band. Uplink transmission, thus improving LAA uplink transmission efficiency, improving system throughput, while using OFDM technology for multiplexing, will inherit the advantages of OFDM, improve resource utilization and anti-interference ability of transmitted data.

Preferably, the first UE is not scheduled on the subframe n-1, or the first UE is scheduled on the subframe n-1 but does not obtain an uplink transmission opportunity.

Preferably, the first UE occupies subframe n to send uplink data, including:

If the channel competition subframe is subframe n-1, the first UE occupies the entire subframe n to send uplink data, and sends its own HII-RS on the OFDM symbol specified in subframe n;

If the channel contention subframe is subframe n, the first UE uses part or all of the current remaining OFDM symbols in subframe n to send uplink data and its own HII-RS.

Preferably, when reaching the channel competition subframe corresponding to subframe n, before performing HII-RS detection, further include:

The first UE performs CCA energy detection, and determines that subsequent HII-RS detection can be performed when determining that the channel contention subframe is not idle according to the CCA energy detection result.

Preferably, the first UE performing CCA energy detection further includes:

If the channel competition subframe is subframe n-1, when the first UE determines that the channel competition subframe is idle according to the CCA energy detection result, it sends an occupation signal Preamble on the channel competition subframe and sends uplink data on subframe n, Wherein, the sending start time of Preamble is the time when the first UE detects that the channel competition subframe is idle, and the sending end time of Preamble is the end time of subframe n-1;

If the channel competition subframe is subframe n, when the first UE determines that the channel competition subframe is idle according to the CCA energy detection result, it sends the Preamble and uplink data on the channel competition subframe, wherein the start time of sending the Preamble is The moment when the first UE detects that the channel competition subframe is idle, and the moment when the sending of the Preamble ends, the moment when the first UE starts to send uplink data.

Preferably, in the process of sending the Preamble, if the first UE determines that the OFDM symbol carrying the Preamble can carry the HII-RS at the same time, it sends its own HII-RS at the same time.

Preferably, if the first UE determines that the channel contention subframe is not idle according to the CCA energy detection result, but no HII-RS is detected, the uplink transmission is abandoned.

Preferably, the sum of the actual continuous channel occupancy durations obtained by eNB scheduling for all UEs including the first UE within the jurisdiction of the eNB is smaller than the set threshold.

Preferably, if the first UE determines that the eNB has further scheduled subframe n+1 for sending uplink data, it will continue to send uplink data in subframe n+1 after sending uplink data in subframe n.

Preferably, the HII-RS sent by the first UE is used to be identified by a homologous UE belonging to the same operator as the first UE, or/and, used to be identified by a homologous UE belonging to the same serving cell as the first UE identify.

Preferably, the above-mentioned HII-RS is a Zadoff-Chu sequence, and the root sequence of the above-mentioned Zadoff-Chu sequence is a function representing the identity of the operator; or,

The above HII-RS is a Zadoff-Chu sequence, and the root sequence of the above Zadoff-Chu sequence is a function that characterizes the identity of the serving cell; or,

The above-mentioned HII-RS is a Zadoff-Chu sequence, and the root sequence of the above-mentioned Zadoff-Chu sequence is a joint function representing the identifier of the operator and the identifier of the serving cell.

Preferably, the above-mentioned HII-RS is a cyclic shift sequence, and the initial phase of the above-mentioned cyclic shift sequence is a function representing the identity of the operator, or, the above-mentioned HII-RS is a tap combination sequence of two cyclic shift sequences, where the initial phase of a cyclic sequence as a function of the identity of the operator;

or,

The above-mentioned HII-RS is a cyclic shift sequence, and the initial phase of the above-mentioned cyclic shift sequence is a function representing the identity of the serving cell, or, the above-mentioned HII-RS is a tap combination sequence of two cyclic shift sequences, and one of the cyclic shift sequences The initial phase is a function characterizing the identity of the serving cell;

or,

The above-mentioned HII-RS is a cyclic shift sequence, and the initial phase of the above-mentioned cyclic shift sequence is a joint function representing the identity of the operator and the identity of the serving cell, or the above-mentioned HII-RS is a tap combination sequence of two cyclic shift sequences, The initial phase of one of the cyclic sequences is a joint function representing the identity of the operator and the identity of the serving cell.

Preferably, the first UE sends the HII-RS, specifically including:

If the above HII-RS is used to be identified by a homologous UE belonging to the same operator as the first UE, then the first UE maps the above HII-RS to a first time domain position and a first frequency domain position for transmission; wherein, All UEs under the jurisdiction of the operator to which the first UE belongs use the above-mentioned first time frequency and first frequency domain to send the HII-RS; or,

If the above HII-RS is used to be identified by a homologous UE belonging to the same serving cell as the first UE, the first UE maps the above HII-RS to a second time domain position and a second frequency domain position for transmission; wherein , all UEs under the jurisdiction of the serving cell to which the first UE belongs use the above-mentioned second time frequency and second frequency domain to send the HII-RS; or,

If the above-mentioned HII-RS is used to be identified by a homologous UE belonging to the same serving cell of the same operator as the first UE, the above-mentioned first UE maps the above-mentioned HII-RS to a third time domain position and a third frequency domain position The operator to which the first UE belongs and all UEs under the simultaneous jurisdiction of the serving cell to which the first UE belongs use the above-mentioned third time frequency and third frequency domain to send the HII-RS.

Preferably, in the process of sending HII-RS, if the first UE determines that the frequency domain position occupied by sending HII-RS overlaps with the frequency domain position occupied by sending uplink data, then the first UE sends uplink data When , do not use the conflicting resource element RE in the overlapping area, or do not use all the OFDM symbols in the overlapping area.

Preferably, the first UE sends the HII-RS, specifically including:

the first UE sends the HII-RS over the entire bandwidth; or

The first UE sends the HII-RS according to the set frequency domain resource interval on the entire bandwidth; or,

The first UE sends the HII-RS on the M PRBs located in the central bandwidth.

An uplink transmission device based on an unlicensed frequency band, comprising:

A determining unit, configured to determine the subframe n scheduled by the base station eNB for the above device, where the subframe n works in an unlicensed frequency band and is used to send uplink data;

The detection unit is configured to perform HII-RS detection when reaching the channel competition subframe corresponding to subframe n; wherein, the channel competition subframe is subframe n-1 or subframe n;

The sending unit is configured to determine that there is an identifiable HII-RS, determine that the channel competition subframe has been occupied by another UE of the same source as the above device, and then occupy subframe n to send uplink data.

In the embodiment of the present invention, on the unlicensed frequency band, the first UE is determined to be scheduled by the eNB in subframe n, and the HII-RS detection is performed on the channel competition subframe to determine whether it is occupied by a UE of the same source, and if it is determined to be occupied If there is an HII-RS on the channel of the channel, it means that there are other UEs with the same source as the UE on the channel, and then the UE can send uplink data on the subframe n, that is, multiple UEs can use the OFDM technology to multiplex the same unlicensed frequency band. Uplink transmission, thus improving LAA uplink transmission efficiency, improving system throughput, while using OFDM technology for multiplexing, will inherit the advantages of OFDM, improve resource utilization and anti-interference ability of transmitted data.

Preferably, the determining unit is further configured to determine that the above-mentioned apparatus is not scheduled on the subframe n-1, or that the above-mentioned apparatus is scheduled on the subframe n-1 but does not obtain an uplink transmission opportunity.

Preferably, when the sending unit occupies subframe n to send uplink data, it is specifically used for:

If the channel competition subframe is subframe n-1, occupy the entire subframe n to send uplink data, and send its own HII-RS on the OFDM symbol specified in subframe n;

If the channel contention subframe is subframe n, use part or all of the current remaining OFDM symbols in subframe n to send uplink data and its own HII-RS.

Preferably, when arriving at the channel competition subframe corresponding to subframe n, before performing HII-RS detection, the detection unit is further used for:

Perform channel idle assessment CCA energy detection, and determine that subsequent HII-RS detection can be performed when it is determined that the channel contention subframe is not idle according to the CCA energy detection result.

Preferably, the sending unit is further used for:

If the channel competition subframe is subframe n-1, when the channel competition subframe is determined to be idle through the CCA energy detection result of the detection unit, an occupation signal Preamble is sent on the channel competition subframe, and uplink data is sent on subframe n, Wherein, the sending start time of Preamble is the time when the detection unit detects that the channel competition subframe is idle, and the sending end time of Preamble is the end time of subframe n-1;

If the channel competition subframe is subframe n, when the channel competition subframe is determined to be idle by the CCA energy detection result of the detection unit, the Preamble is sent on the channel competition subframe, and the uplink data is sent, wherein the sending start time of the Preamble is The detection unit detects the time when the channel competition subframe is idle, and the end time of sending the Preamble is the time when the uplink data starts to be sent.

Preferably, the sending unit is further used for:

In the process of sending the Preamble, if it is determined that the OFDM symbol carrying the Preamble can carry the HII-RS at the same time, then send its own HII-RS at the same time.

Preferably, the sending unit is further used for:

If the CCA energy detection result of the detection unit determines that the channel competition subframe is not idle, but no HII-RS is detected, the uplink transmission is abandoned.

Preferably, for all the devices including the above devices within the jurisdiction of the eNB, the sum of the actual durations of continuously occupying channels obtained through eNB scheduling is less than the set threshold.

Preferably, the sending unit is further used for:

If it is known through the determining unit that the eNB has further scheduled subframe n+1 for sending uplink data for the above-mentioned device, after sending uplink data on subframe n, continue to send uplink data on subframe n+1

Preferably, the HII-RS sent by the sending unit is used to be identified by a homologous UE belonging to the same operator as the above device, or/and used to be identified by a homologous UE belonging to the same serving cell as the above device.

Preferably, the above-mentioned HII-RS is a Zadoff-Chu sequence, and the root sequence of the above-mentioned Zadoff-Chu sequence is a function representing the identity of the operator; or,

The above HII-RS is a Zadoff-Chu sequence, and the root sequence of the above Zadoff-Chu sequence is a function that characterizes the identity of the serving cell; or,

The above-mentioned HII-RS is a Zadoff-Chu sequence, and the root sequence of the above-mentioned Zadoff-Chu sequence is a joint function representing the identifier of the operator and the identifier of the serving cell.

Preferably, the above-mentioned HII-RS is a cyclic shift sequence, and the initial phase of the above-mentioned cyclic shift sequence is a function representing the identity of the operator, or, the above-mentioned HII-RS is a tap combination sequence of two cyclic shift sequences, where the initial phase of a cyclic sequence as a function of the identity of the operator;

or,

The above-mentioned HII-RS is a cyclic shift sequence, and the initial phase of the above-mentioned cyclic shift sequence is a function representing the identity of the serving cell, or, the above-mentioned HII-RS is a tap combination sequence of two cyclic shift sequences, and one of the cyclic shift sequences The initial phase is a function characterizing the identity of the serving cell;

or,

The above-mentioned HII-RS is a cyclic shift sequence, and the initial phase of the above-mentioned cyclic shift sequence is a joint function representing the identity of the operator and the identity of the serving cell, or the above-mentioned HII-RS is a tap combination sequence of two cyclic shift sequences, The initial phase of one of the cyclic sequences is a joint function representing the identity of the operator and the identity of the serving cell.

Preferably, when the sending unit sends the HII-RS, it is specifically used for:

If the above-mentioned HII-RS is used to be identified by a homologous UE belonging to the same operator as the above-mentioned device, the above-mentioned HII-RS is mapped to the first time domain position and the first frequency domain position for transmission; wherein, the above-mentioned device belongs to All UEs under the jurisdiction of the operator use the above-mentioned first time frequency and first frequency domain to send HII-RS; or,

If the above-mentioned HII-RS is used for identification by a homologous UE belonging to the same serving cell of the above-mentioned device, the above-mentioned HII-RS is mapped to a second time domain position and a second frequency domain position for transmission; wherein, the above-mentioned device belongs to All UEs under the jurisdiction of the serving cell use the above-mentioned second time frequency and second frequency domain to send the HII-RS; or,

If the above HII-RS is used to be identified by the same source UE of the same serving cell belonging to the same operator as the above device, then map the above HII-RS to a third time domain position and a third frequency domain position for transmission; wherein, All UEs under the simultaneous jurisdiction of the operator to which the above-mentioned device belongs and the serving cell to which the first UE belongs use the above-mentioned third time frequency and third frequency domain to send the HII-RS.

Preferably, the sending unit is further used for:

In the process of sending HII-RS, if it is determined that the frequency domain position occupied by sending HII-RS overlaps with the frequency domain position occupied by sending uplink data, then when sending uplink data, do not use the above overlapping area. resource element RE, or do not use all the OFDM symbols in the above overlapping area.

Preferably, when the sending unit sends the HII-RS, it is specifically used for:

Send HII-RS over the entire bandwidth; or

Send the HII-RS according to the set frequency domain resource interval on the entire bandwidth; or,

The HII-RS is sent on the M PRBs located in the center bandwidth.

Description of drawings

FIG. 1 is a schematic flow diagram of eNB scheduling in an embodiment of the present invention;

2 is a schematic flow diagram of an uplink transmission method and device based on an unlicensed frequency band in an embodiment of the present invention;

FIG. 3 is a flow chart of a preferred time-domain position and frequency-domain position where the UE sends the HII-RS to which the HII-RS is mapped in an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of an uplink transmission device based on an unlicensed frequency band in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In order to effectively improve the uplink transmission efficiency of the LAA device, in the embodiment of the present invention, in the unlicensed frequency band, when the UE competes for an uplink transmission opportunity, it needs to perform homologous interference identification reference signal (Homologous Interference Identification Reference Signal, HII-RS) detection, if If it is determined that there is HII-RS on the occupied channel, it means that there are other UEs with the same source as the UE on the channel, and then the UE can obtain an uplink transmission opportunity on the channel, that is, multiple UEs can use OFDM technology to multiplex the same Authorized frequency band for uplink transmission.

The process of scheduling all UEs within the jurisdiction of the eNB will first be introduced below, taking the example shown in FIG. 1 for illustration.

For example, referring to FIG. 1 , it is assumed that the eNB sends scheduling information on subframe n-k, and the UE does not start competing for uplink transmission opportunities until subframe n. This is because the processing capability of the UE can usually understand the previously received scheduling information only after several subframe processing delays. For example, in the existing FDD-LTE system on the licensed frequency band, k=4.

Step 100: When the eNB is in an idle state, start scheduling all UEs within its jurisdiction for uplink transmission;

Step 110: The eNB determines that the first UE within its jurisdiction has successfully competed for an uplink transmission opportunity on subframe n, and initializes a transmission time timer (TXOP-k-1) ms; where TXOP is defined by the regional spectrum specification The maximum allowed transmission time, k is the time interval for the above UE to process the scheduling information, and -1 is the time for the first UE to transmit uplink data in subframe n.

Step 120: The eNB enters the burst transmission state, and continues to schedule UEs within its jurisdiction for uplink transmission;

Step 130: the transmission time timer is overtime; it is judged whether the transmission time timer is overtime, and when the transmission time timer is not overtime, step 120 will be continued, otherwise, step 140 will be performed;

Step 140: The eNB enters an active idle state and does not schedule any UE; in this way, UEs within the jurisdiction of the eNB actively give up uplink transmission opportunities. After a period of time, such as 1 ms, the eNB returns to step 100 again.

The following only takes scheduling the first UE for uplink transmission as an example to describe the solutions of the present invention in detail. Of course, the present invention is not limited to the following embodiments.

Referring to Figure 2, in the embodiment of the present invention, the specific process of performing uplink transmission based on the unlicensed frequency band is as follows:

Step 200: the first UE determines the subframe n scheduled by the eNB for the first UE, wherein the subframe n works in an unlicensed frequency band of the first UE and is used for sending uplink data.

In practical applications, one eNB will govern multiple UEs, and all UEs are subject to the unified scheduling of the eNB. Taking the first UE as an example, on the unlicensed frequency band, the first UE receives the scheduling instruction issued by the eNB and determines that it is scheduled Up to subframe n to send uplink data, the UE will compete for the uplink transmission opportunity of subframe n. Wherein, the premise that the first UE is scheduled to the subframe n is that the first UE is not scheduled on the subframe n-1, or the first UE is scheduled on the subframe n-1 but does not obtain an uplink transmission opportunity.

In practical applications, the sum of the actual continuous channel occupancy durations of all UEs including the first UE within the jurisdiction of the eNB obtained through eNB scheduling is less than the set threshold.

Wherein, the sum of the duration of continuous channel occupation by all UEs includes not only the time when the UE sends uplink data, but also the occupation duration of the Preamble if the UE sends a preamble.

For example: in the above Figure 1, when the eNB is in the idle state, it schedules all UEs within its jurisdiction for uplink transmission; when the first UE obtains an uplink transmission opportunity in subframe n, the eNB initializes a transmission time timer (TXOP -k-1) ms, the transmission time timer is the set threshold; then the eNB continues to schedule UEs within its jurisdiction for uplink transmission, and when each UE obtains an uplink transmission opportunity on the channel, the above transmission time timer The timer is updated accordingly until the above-mentioned transmission time timer expires, that is, the sum of the actual continuous channel occupation time obtained by all UEs scheduled by the eNB exceeds the set threshold, then the eNB will enter the active idle state and no longer schedule UEs , therefore, the sum of the actual continuous channel occupancy durations obtained by eNB scheduling for all UEs including the first UE within the jurisdiction of the eNB is smaller than the set threshold.

Step 210: When reaching a channel competition subframe corresponding to subframe n, the first UE performs HII-RS detection; wherein, the channel competition subframe is subframe n-1 or subframe n.

When performing step 210, before the first UE performs HII-RS, preferably, the first UE may first perform CAA energy detection on the channel competition subframe (ie, subframe n or subframe n-1), if detected When the channel competition subframe is idle, the first UE occupies the channel competition subframe and sends uplink data on subframe n; if it is detected that the channel competition subframe is not idle, that is, the channel competition subframe has been occupied by other UEs , so the first UE needs to continue to perform HII-RS detection to determine whether it is occupied by a UE of the same source, that is, to compete for another uplink transmission opportunity. Here, the channel is idle, which means that the interference signal strength is lower than the set threshold, and the accumulated duration reaches the set duration; otherwise, the channel is not idle.

Of course, instead of performing CAA energy detection, direct HII-RS detection can also directly detect whether there are other homologous UEs, which will not be repeated here.

Step 220: When the first UE determines that there is an identifiable HII-RS, it determines that the above-mentioned channel competition subframe has been occupied by another UE of the same source as the first UE, and then occupies subframe n to send uplink data.

In the embodiment of the present invention, the so-called HII-RS that can be recognized by the first UE refers to the HII-RS that can be correctly parsed and available by the first UE and conforms to the preset rules. It belongs to the same operator, or/and, belongs to other UEs in the same serving cell. However, in practical applications, there are some situations where other UEs that are not of the same origin as the first UE can resolve the HII-RS, but in this case, the HII-RS is unavailable for these other UEs that are not of the same origin. case, it is still called unrecognized.

On the other hand, if the channel competition subframe is already occupied by the same source UE of the first UE, no matter whether the channel competition subframe is subframe n-1 or subframe n, other non-same source UEs cannot access the above channel competition subframe. frame, therefore, it can be determined that the uplink transmission opportunity on subframe n has been contended for, and uplink data can be sent on subframe n.

Specifically, when executing step 220, the following two situations are specifically included:

In the first case, if the channel competition subframe is subframe n-1, when the first UE determines that there is an HII-RS in subframe n-1, it determines that subframe n-1 has been replaced by other UEs of the same origin as the first UE Occupation, where the homologous representation and the first UE come from the same operator, or/and, the same serving cell, then the first UE occupies the entire subframe n to send uplink data, and on the OFDM symbol specified in subframe n Send its own HII-RS, wherein, the specified OFDM symbols are the last N first, or the middle N, or non-consecutive N, and N is a preset value. Wherein, the first UE occupying the entire subframe n to send uplink data refers to occupying the entire subframe n in the time domain, and occupying part of the frequency band according to eNB scheduling in the frequency domain.

In the second case, if the channel competition subframe is subframe n, when the first UE determines that there is an HII-RS, it determines that subframe n is occupied by other UEs of the same source as the first UE, then the first UE uses Send uplink data and its own HII-RS for the remaining part or all OFDM symbols.

After step 220 is executed, if the first UE occupies subframe n, other UEs of non-homologous origin will hear that the channel is busy on subframe n, so they will not be on subframe n, and will not be on subframe n Send data at the starting position of +1. At this time, if the first UE determines that the eNB has further scheduled subframe n+1 for sending uplink data, there is no need to compete for the uplink transmission opportunity on subframe n+1, and after sending uplink data on subframe n, The uplink data may continue to be sent on subframe n+1. At this time, other non-same-source UEs will also detect that the channel is busy on subframe n+1, and therefore will not send data on subframe n+1. Therefore, if the above-mentioned first UE determines that the eNB has further scheduled subframe n+1 for sending uplink data, there is no need to compete for the uplink transmission opportunity on subframe n+1, and after sending uplink data on subframe n, it can Continue to send uplink data on subframe n+1, this operation behavior can avoid interference and is effective.

Based on the above embodiments, if the first UE performs CAA energy detection on the channel competition subframe and detects that the channel competition subframe is idle, it can perform but not limited to the following two operations:

The first operation is: if the channel competition subframe is subframe n-1, the first UE sends a Preamble on the channel competition subframe when it determines that the channel competition subframe is idle according to the CCA energy detection result, and sends a Preamble on the subframe n Sending uplink data, wherein, the sending start time of the Preamble is the time when the first UE detects that the channel competition subframe is idle, and the sending end time of the Preamble is the termination time of subframe n-1;

The second operation is: if the channel competition subframe is subframe n, the first UE sends a Preamble and uplink data on the channel competition subframe when the first UE determines that the channel competition subframe is idle according to the CCA energy detection result, wherein the Preamble The transmission start time of Preamble is the time when the first UE detects that the channel competition subframe is idle, and the transmission end time of Preamble is the time when the first UE starts to send uplink data.

When performing the above two operations, if the first UE determines that the OFDM symbol carrying the Preamble can carry HII-RS at the same time during the process of sending the Preamble, it needs to send its own HII-RS at the same time, so as to facilitate other UEs to detect .

Based on the above embodiments, in the embodiment of the present invention, if the first UE determines that the channel competition subframe is not idle according to the CAA energy detection result, but no HII-RS is detected, it means that the channel competition subframe is not from the same source as the first UE. occupied by other UEs, the first UE gives up this uplink transmission.

It can be known from the above embodiments that after the first UE sends uplink data in the scheduled subframe n, it needs to further send its own HII-RS, so that when other UEs perform HII-RS detection, they can know that subframe n has been The first UE is occupied. In practical applications, each UE needs to send HII-RS on the subframe occupied by itself for other UEs to perform HII-RS detection. In the following embodiments, only the first UE is taken as an example to introduce the specific structure of HII-RS .

In the above embodiment, the HII-RS sent by the first UE is used to be identified by a homologous UE that belongs to the same operator as the first UE, or/and is used to be identified by a UE that belongs to the same serving cell as the first UE Same-origin UE identification.

For example, the HII-RS can be a Zadoff-Chu sequence. Specifically divided into the following three situations:

1. The root sequence of the above Zadoff-Chu sequence is a function representing the operator identity.

2. The root sequence of the above Zadoff-Chu sequence is a function representing the identity of the serving cell.

3. The root sequence of the above Zadoff-Chu sequence is a joint function representing the identity of the operator and the identity of the serving cell.

For another example, the HII-RS may be a cyclic shift sequence, or the HII-RS may be a tap combination sequence of two cyclic shift sequences. Specifically divided into the following three situations:

1. HII-RS is a cyclic shift sequence, the initial phase of the cyclic shift sequence is a function that characterizes the operator’s identity, or, HII-RS is a tap combination sequence of two cyclic shift sequences, one of which is a cyclic sequence The initial phase is a function characterizing the operator identity.

2. The HII-RS is a cyclic shift sequence whose initial phase is a function that characterizes the identity of the serving cell, or the HII-RS is a tap combination sequence of two cyclic shift sequences, one of which is a cyclic shift sequence The initial phase is a function characterizing the identity of the serving cell;

3. The HII-RS is a cyclic shift sequence whose initial phase is a joint function representing the identity of the operator and the identity of the serving cell, or the HII-RS is a tap combination sequence of two cyclic shift sequences, The initial phase of one of the cyclic sequences is a joint function representing the identity of the operator and the identity of the serving cell.

The structure of the HII-RS can be set in the above-mentioned several ways. Correspondingly, when the first UE sends the HII-RS, it may specifically adopt but not limited to the following methods:

The first method is: if the HII-RS is used to be identified by a homologous UE belonging to the same operator as the first UE, the first UE maps the above HII-RS to the first time domain position and the first frequency domain position sending on the network; wherein, all UEs under the jurisdiction of the operator to which the first UE belongs use the above-mentioned first time frequency and first frequency domain to send the HII-RS.

That is to say, the first time domain position and the first frequency domain position mapped by HII-RS are the same only for all UEs in the same operator, and all UEs belonging to the same operator use the same first time domain position and the first frequency domain position to send the HII-RS.

The second method is: if the above HII-RS is used to be identified by a homologous UE belonging to the same serving cell as the first UE, the first UE maps the above HII-RS to the second time domain position and the second frequency domain Sending is performed at a location; wherein, all UEs under the jurisdiction of the serving cell to which the first UE belongs use the above-mentioned second time frequency and second frequency domain to send the HII-RS.

That is to say, the second time domain position and the second frequency domain position mapped by the HII-RS are the same only for all UEs in the same serving cell, and all UEs belonging to the same serving cell use the same second time domain position and the second frequency domain position to send the HII-RS.

The third method is: if the above HII-RS is used to be identified by a homologous UE belonging to the same serving cell of the same operator as the first UE, the above first UE maps the above HII-RS to a third time domain position The HII-RS is sent at the position of the third frequency domain; wherein, the operator to which the first UE belongs and all UEs under the jurisdiction of the serving cell to which the first UE belongs simultaneously use the above-mentioned third time frequency and third frequency domain to send the HII-RS.

That is to say, the third time domain position and the third frequency domain position mapped by HII-RS are the same only for all UEs in the same serving cell of the same operator, and belong to all UEs in the same serving cell of the same operator. The HII-RS is sent at the same third time domain position and third frequency domain position.

For example, when the HII-RS is a Zadoff-Chu sequence, the HII-RS and the transmitted uplink data are combined for frequency domain mapping, and then an Inverse Fast Fourier Transform (IFFT) operation is performed, and finally the transmitted go out.

For another example, when the HII-RS is a cyclic shift sequence, or when the HII-RS is a certain tap combination sequence of two cyclic shift sequences, the HII-RS is first subjected to discrete Fourier transform (Discrete Fourier Transform , DFT) operation, after performing frequency domain mapping jointly with the transmitted uplink data, then performing IFFT operation, and finally sending it out.

Here, the UE needs to be able to support the multi-carrier working mode, that is, the resources (including uplink data and HII-RS at the same time) after frequency domain mapping are allowed to be discontinuous.

In particular, it should be pointed out that if the time domain position and frequency domain position to which the first UE sends the HII-RS are not the same for all UEs belonging to the same operator, or/and, the same serving cell, for example, All UEs in the same cell are mapped to the same time domain position and frequency domain position when sending HII-RS, but UEs in different cells of the same operator are mapped to time domain positions and frequency domain positions when sending HII-RS Not all are the same. Then the eNB notifies the UEs under its jurisdiction of the time domain location and frequency domain location information of the HII-RS through high layer signaling, such as radio resource control (Radio Resource Control, RRC) signaling.

Further, during the process of sending the HII-RS by the first UE, if the first UE determines that the frequency domain position occupied by sending the HII-RS overlaps with the frequency domain position occupied by sending uplink data, the first UE sends When uplink data is used, resource elements (Resource Elements, REs) that have conflicts in the overlapping area are not used, or all OFDM symbols in the overlapping area are not used.

In step 220, when the first UE sends the HII-RS, different frequency domain positions may be selected, specifically including but not limited to the following methods:

The first way is: the first UE sends the HII-RS on the whole bandwidth.

The second way is: the first UE sends the HII-RS on the whole bandwidth according to the set frequency domain resource interval.

For example, the first UE sends the HII-RS evenly in units of REs, and on the basis of REs at the same interval across the entire bandwidth.

For another example, the first UE sends the HII-RS evenly on the basis of physical resource blocks (Physical Resource Blocks, PRBs) at the same interval in the whole bandwidth, taking a radio bearer (Radio Bearer, RB) as a unit.

Another example: the first UE sends the HII-RS in each of the M/2 PRBs on both sides of the center bandwidth; preferably, the first UE sends the HII-RS on the M PRBs located in the center bandwidth.

For example, referring to Figure 3, a preferred UE sends the time domain position and frequency domain position where the HII-RS is mapped, so that on each subframe, the last N OFDM symbols of each subframe are occupied (N≥1) The HII-RS is sent on the 6 PRBs of the central bandwidth.

The specific operation is as follows: Assume that the eNB allows UE1 and UE2 to perform uplink transmission on subframe n through scheduling, UE1 and UE3 to perform uplink transmission on subframe n+1, and UE2 and UE3 to perform uplink transmission on subframe n+2. The following only uses the eNB to allow UE1 and UE2 to perform uplink transmission on subframe n through scheduling as an example for illustration, but the present invention is not limited to this embodiment.

Initially, UE1 and UE2 are scheduled by the eNB to perform uplink transmission on subframe n, and neither of them transmits uplink data on subframe n-1, that is, both UE1 and UE2 need to compete on subframe n-1 to perform uplink transmission. Uplink transmission opportunity on frame n;

If UE1 first competes for the uplink transmission opportunity on subframe n, and sends occupancy information on subframe n-1, then sends uplink data on subframe n, and at the same time on the last N OFDM symbols (N≥ 1) The HII-RS is sent on the 6 PRBs of the central bandwidth, and if UE1 determines that the eNB has further scheduled subframe n+1 for sending uplink data, there is no need to compete for the uplink transmission opportunity on subframe n+1 , after sending uplink data on subframe n, continue to send uplink data on subframe n+1;

Since UE1 sends occupancy information on subframe n-1, when UE2 performs CAA energy detection, it will determine that the channel is occupied, and then continue to perform HII-RS-based detection. If HII-RS is detected, UE2 will determine the channel Occupied by other UEs of the same source, UE2 can send uplink data on subframe n, and at the same time send HII-RS on the 6 PRBs of the central bandwidth on the last N OFDM symbols (N≥1). It can also be known from this embodiment that sending the HII-RS will destroy the UL single-carrier characteristic, so the UE needs to be able to support the multi-carrier working mode.

Based on the above embodiment, refer to FIG. 4, in the embodiment of the present invention, an uplink transmission device based on an unlicensed frequency band specifically includes:

The determining unit 40 is configured to determine the subframe n scheduled by the base station eNB for the above-mentioned device, and the subframe n works in an unlicensed frequency band and is used to send uplink data;

The detection unit 41 is configured to perform HII-RS detection when the channel competition subframe corresponding to subframe n is reached; wherein, the above channel competition subframe is subframe n-1 or subframe n;

The sending unit 42 is configured to determine that there is an identifiable HII-RS, determine that the channel competition subframe has been occupied by another UE of the same source as the above device, and then occupy subframe n to send uplink data.

Preferably, the determining unit 40 is further configured to determine that the above-mentioned apparatus is not scheduled on the subframe n-1, or that the above-mentioned apparatus is scheduled on the subframe n-1 but does not obtain an uplink transmission opportunity.

Preferably, when the sending unit 42 occupies subframe n to send uplink data, it is specifically used for:

If the channel competition subframe is subframe n-1, occupy the entire subframe n to send uplink data, and send its own HII-RS on the OFDM symbol specified in subframe n;

If the channel contention subframe is subframe n, use part or all of the current remaining OFDM symbols in subframe n to send uplink data and its own HII-RS.

Preferably, when arriving at the channel competition subframe corresponding to subframe n, before performing HII-RS detection, the detection unit 41 is further used to:

Perform channel idle assessment CCA energy detection, and determine that subsequent HII-RS detection can be performed when the channel competition subframe is determined to be non-idle according to the CCA energy detection result

Preferably, the sending unit 42 is further used for:

If the channel competition subframe is subframe n-1, when the channel competition subframe is determined to be idle according to the CCA energy detection result of the detection unit 41, an occupation signal Preamble is sent on the channel competition subframe, and uplink data is sent on subframe n , wherein, the sending start time of the Preamble is the time when the detection unit 41 detects that the channel competition subframe is idle, and the sending end time of the Preamble is the termination time of subframe n-1;

If the channel competition subframe is subframe n, when the CCA energy detection result of the detection unit 41 determines that the channel competition subframe is idle, the Preamble is sent on the channel competition subframe, and the uplink data is sent, wherein the sending start time of the Preamble The detection unit 41 detects the time when the channel competition subframe is idle, and the end time of sending the Preamble is the time when the uplink data starts to be sent.

Preferably, the sending unit 42 is further used for:

In the process of sending the Preamble, if it is determined that the OFDM symbol carrying the Preamble can carry the HII-RS at the same time, then send its own HII-RS at the same time.

Preferably, the sending unit 42 is further used for:

If the CCA energy detection result of the detection unit 41 determines that the channel contention subframe is not idle, but no HII-RS is detected, the uplink transmission is abandoned.

Preferably, for all the devices including the above devices within the jurisdiction of the eNB, the sum of the actual durations of continuously occupying channels obtained through eNB scheduling is less than the set threshold.

Preferably, the sending unit 42 is further used for:

If it is known through the determination unit 40 that the eNB has further scheduled subframe n+1 for sending uplink data for the above-mentioned device, after sending uplink data on subframe n, continue to send uplink data on subframe n+1

Preferably, the HII-RS sent by the sending unit 42 is used to be identified by a homologous UE belonging to the same operator as the above device, or/and used to be identified by a homologous UE belonging to the same serving cell as the above device .

Preferably, the above-mentioned HII-RS is a Zadoff-Chu sequence, and the root sequence of the above-mentioned Zadoff-Chu sequence is a function representing the identity of the operator; or,

The above HII-RS is a Zadoff-Chu sequence, and the root sequence of the above Zadoff-Chu sequence is a function that characterizes the identity of the serving cell; or,

The above-mentioned HII-RS is a Zadoff-Chu sequence, and the root sequence of the above-mentioned Zadoff-Chu sequence is a joint function representing the identifier of the operator and the identifier of the serving cell.

Preferably, the above-mentioned HII-RS is a cyclic shift sequence, and the initial phase of the above-mentioned cyclic shift sequence is a function representing the identity of the operator, or, the above-mentioned HII-RS is a tap combination sequence of two cyclic shift sequences, where the initial phase of a cyclic sequence as a function of the identity of the operator;

or,

The above-mentioned HII-RS is a cyclic shift sequence, and the initial phase of the above-mentioned cyclic shift sequence is a function representing the identity of the serving cell, or, the above-mentioned HII-RS is a tap combination sequence of two cyclic shift sequences, and one of the cyclic shift sequences The initial phase is a function characterizing the identity of the serving cell;

or,

The above-mentioned HII-RS is a cyclic shift sequence, and the initial phase of the above-mentioned cyclic shift sequence is a joint function representing the identity of the operator and the identity of the serving cell, or the above-mentioned HII-RS is a tap combination sequence of two cyclic shift sequences, The initial phase of one of the cyclic sequences is a joint function representing the identity of the operator and the identity of the serving cell.

Preferably, when the sending unit 42 sends the HII-RS, it is specifically used for:

If the above-mentioned HII-RS is used to be identified by a homologous UE belonging to the same operator as the above-mentioned device, the above-mentioned HII-RS is mapped to the first time domain position and the first frequency domain position for transmission; wherein, the above-mentioned device belongs to All UEs under the jurisdiction of the operator use the above-mentioned first time frequency and first frequency domain to send HII-RS; or,

If the above-mentioned HII-RS is used for identification by a homologous UE belonging to the same serving cell of the above-mentioned device, the above-mentioned HII-RS is mapped to a second time domain position and a second frequency domain position for transmission; wherein, the above-mentioned device belongs to All UEs under the jurisdiction of the serving cell use the above-mentioned second time frequency and second frequency domain to send the HII-RS; or,

If the above HII-RS is used to be identified by the same source UE of the same serving cell belonging to the same operator as the above device, then map the above HII-RS to a third time domain position and a third frequency domain position for transmission; wherein, All UEs under the simultaneous jurisdiction of the operator to which the above-mentioned device belongs and the serving cell to which the first UE belongs use the above-mentioned third time frequency and third frequency domain to send the HII-RS.

Preferably, the sending unit 42 is further used for:

In the process of sending HII-RS, if it is determined that the frequency domain position occupied by sending HII-RS overlaps with the frequency domain position occupied by sending uplink data, then when sending uplink data, do not use the above overlapping area. resource element RE, or do not use all the OFDM symbols in the above overlapping area.

Preferably, when the sending unit 42 sends the HII-RS, it is specifically used for:

Send HII-RS over the entire bandwidth; or

Send the HII-RS according to the set frequency domain resource interval on the entire bandwidth; or,

The HII-RS is sent on the M PRBs located in the center bandwidth.

To sum up, in the embodiment of the present invention, when a UE competes for an uplink transmission opportunity on an unlicensed frequency band, HII-RS detection is performed to determine whether it is occupied by a UE of the same source. If it is determined that there is an HII-RS on the occupied channel , it means that there are other UEs with the same source as the UE on the channel, then the UE can obtain uplink transmission opportunities on the channel, that is, multiple UEs can use the OFDM technology to multiplex the same unlicensed frequency band for uplink transmission, thus improving the LAA uplink Transmission efficiency, improve system throughput, while using OFDM technology for multiplexing, will inherit the advantages of OFDM, improve resource utilization and anti-interference ability of transmitted data.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if the modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (26)

1. An uplink transmission method based on an unlicensed frequency band, characterized in that, comprising: The first user equipment UE determines the subframe n scheduled by the base station eNB for the first UE, and the subframe n works in an unlicensed frequency band of the first UE and is used to transmit uplink data; When arriving at the channel competition subframe corresponding to subframe n, the first UE performs homologous interference identification reference signal HII-RS detection; wherein, the channel competition subframe is subframe n-1 or subframe n, wherein, in When arriving at the channel competition subframe corresponding to subframe n, before performing HII-RS detection, it further includes: the first UE performs channel idle assessment CCA energy detection, and when determining that the channel competition subframe is not idle according to the CCA energy detection result, Confirm that subsequent HII-RS testing can be performed; The first UE determines that there is an identifiable HII-RS, and determines that the channel competition subframe has been occupied by another UE of the same source as the first UE, and then occupies subframe n to send uplink data, wherein the first UE occupies subframe n Sending uplink data includes at least one of the following: if the channel competition subframe is subframe n-1, the first UE occupies the entire subframe n to send uplink data, and the Orthogonal Frequency Division Multiplexing OFDM specified in subframe n Send its own HII-RS on symbols; if the channel competition subframe is subframe n, the first UE uses part or all of the current remaining OFDM symbols in subframe n to send uplink data and its own HII-RS. 2. The method according to claim 1, wherein the first UE is not scheduled on subframe n-1, or the first UE is scheduled on subframe n-1 but does not obtain Uplink transmission opportunities. 3. The method of claim 1, further comprising at least one of the following: If the channel competition subframe is subframe n-1, when the first UE determines that the channel competition subframe is idle according to the CCA energy detection result, it sends an occupation signal Preamble on the channel competition subframe and sends uplink data on subframe n, Wherein, the sending start time of Preamble is the time when the first UE detects that the channel competition subframe is idle, and the sending end time of Preamble is the end time of subframe n-1; If the channel competition subframe is subframe n, when the first UE determines that the channel competition subframe is idle according to the CCA energy detection result, it sends the Preamble and uplink data on the channel competition subframe, wherein the start time of sending the Preamble is The moment when the first UE detects that the channel competition subframe is idle, and the moment when the sending of the Preamble ends, the moment when the first UE starts to send uplink data. 4. The method of claim 3, further comprising: In the process of sending the Preamble, if the first UE determines that the OFDM symbol carrying the Preamble can carry the HII-RS at the same time, it sends its own HII-RS at the same time. 5. The method according to claim 1, wherein if the first UE determines that the channel competition subframe is not idle according to the CCA energy detection result, but no HII-RS is detected, the uplink transmission is abandoned. 6. The method according to any one of claims 1-5, characterized in that, the sum of the actual continuous channel-occupancy durations obtained by eNB scheduling for all UEs within the jurisdiction of the eNB including the first UE, less than the set threshold. 7. The method according to any one of claims 1-5, wherein if the first UE determines that the eNB has further scheduled subframe n+1 for sending uplink data for it, then sending After the uplink data, continue to send uplink data on subframe n+1. 8. The method according to claim 1 or 4, wherein the HII-RS sent by the first UE is used to be identified by homologous UEs belonging to the same operator as the first UE, or/and is used to be identified by Identification of a homologous UE belonging to the same serving cell as the first UE. 9. The method according to claim 8, wherein the HII-RS is a Zadoff-Chu sequence, and the root sequence of the Zadoff-Chu sequence is a function representing an operator identification; or, The HII-RS is a Zadoff-Chu sequence, and the root sequence of the Zadoff-Chu sequence is a function representing the identity of the serving cell; or, The HII-RS is a Zadoff-Chu sequence, and the root sequence of the Zadoff-Chu sequence is a joint function representing an operator ID and a serving cell ID. 10. The method according to claim 8, wherein the HII-RS is a cyclic shift sequence, and the initial phase of the cyclic shift sequence is a function that characterizes the identity of the operator, or, the HII-RS RS is a tap combination sequence of two cyclic shift sequences, where the initial phase of one cyclic sequence is a function that characterizes the identity of the operator; or, The HII-RS is a cyclic shift sequence, the initial phase of the cyclic shift sequence is a function of the identity of the serving cell, or the HII-RS is a tap combination sequence of two cyclic shift sequences, one of which The initial phase of the cyclic sequence is a function characterizing the identity of the serving cell; or, The HII-RS is a cyclic shift sequence, the initial phase of the cyclic shift sequence is a joint function representing the identity of the operator and the identity of the serving cell, or the HII-RS is a tap of two cyclic shift sequences A combined sequence, wherein the initial phase of a cyclic sequence is a joint function representing the identity of the operator and the identity of the serving cell. 11. The method according to claim 8, wherein the sending of the HII-RS by the first UE specifically comprises: If the HII-RS is used to be identified by a homologous UE belonging to the same operator as the first UE, the first UE maps the HII-RS to a first time domain position and a first frequency domain position for transmission; Wherein, all UEs under the jurisdiction of the operator to which the first UE belongs use the first time frequency and the first frequency domain to send the HII-RS; or, If the HII-RS is used to be identified by a homologous UE belonging to the same serving cell as the first UE, the first UE maps the HII-RS to a second time domain position and a second frequency domain position for transmission ; Wherein, all UEs under the jurisdiction of the serving cell to which the first UE belongs use the second time frequency and the second frequency domain to send the HII-RS; or, If the HII-RS is used to be identified by a homologous UE belonging to the same serving cell of the same operator as the first UE, the first UE maps the HII-RS to the third time domain position and the third Sending is performed at a position in the frequency domain; wherein, the operator to which the first UE belongs and all UEs under the jurisdiction of the serving cell to which the first UE belongs simultaneously use the third time frequency and the third frequency domain to send the HII-RS. 12. The method of claim 8, further comprising: In the process of sending HII-RS, if the first UE determines that the frequency domain position occupied by sending HII-RS overlaps with the frequency domain position occupied by sending uplink data, the first UE does not use Conflicting resource element REs exist in the overlapping area, or all OFDM symbols in the overlapping area are not used. 13. The method according to claim 8, wherein the sending of the HII-RS by the first UE specifically comprises: the first UE sends the HII-RS over the entire bandwidth; or The first UE sends the HII-RS according to the set frequency domain resource interval on the entire bandwidth; or, The first UE sends the HII-RS on the M PRBs located in the central bandwidth. 14. An uplink transmission device based on an unlicensed frequency band, characterized in that it comprises: A determining unit, configured to determine a subframe n scheduled by the base station eNB for the device, where the subframe n works in an unlicensed frequency band and is used to send uplink data; The detection unit is configured to perform homologous interference identification reference signal HII-RS detection when arriving at the channel competition subframe corresponding to subframe n; wherein, the channel competition subframe is subframe n-1 or subframe n, in When arriving at the channel competition subframe corresponding to subframe n, before performing HII-RS detection, the detection unit is further used to: perform channel idle assessment CCA energy detection, and determine that the channel competition subframe is not idle according to the CCA energy detection result , determine that subsequent HII-RS detection can be performed; A sending unit, configured to determine that there is an identifiable HII-RS, determine that the channel competition subframe has been occupied by other UEs of the same source as the device, and occupy subframe n to send uplink data, wherein the occupied subframe n When sending uplink data, the sending unit is configured to perform at least one of the following: if the channel competition subframe is subframe n-1, occupy the entire subframe n to send uplink data, and the orthogonal frequency specified in subframe n Send its own HII-RS on the division multiplexed OFDM symbol; if the channel competition subframe is subframe n, use the current remaining part or all of the OFDM symbols in subframe n to send uplink data and its own HII-RS. 15. The device according to claim 14, wherein the determining unit is further configured to: It is determined that the device is not scheduled on the subframe n-1, or that the device is scheduled on the subframe n-1 but does not obtain an uplink transmission opportunity. 16. The device according to claim 14, wherein the sending unit is further configured to perform at least one of the following: If the channel competition subframe is subframe n-1, when the CCA energy detection result of the detection unit determines that the channel competition subframe is idle, the occupation signal Preamble is sent on the channel competition subframe, and the uplink is sent on subframe n Data, wherein the start time of sending the Preamble is the time when the detection unit detects that the channel competition subframe is idle, and the end time of sending the Preamble is the end time of subframe n-1; If the channel competition subframe is subframe n, when the CCA energy detection result of the detection unit determines that the channel competition subframe is idle, the Preamble is sent on the channel competition subframe and the uplink data is sent, wherein the transmission of the Preamble starts The time is the time when the detection unit detects that the channel competition subframe is idle, and the end time of sending the Preamble is the time when the uplink data starts to be sent. 17. The device according to claim 16, wherein the sending unit is further used for: In the process of sending the Preamble, if it is determined that the OFDM symbol carrying the Preamble can carry the HII-RS at the same time, then send its own HII-RS at the same time. 18. The device according to any one of claims 14-17, wherein the sending unit is further configured to: If it is determined by the CCA energy detection result of the detection unit that the channel competition subframe is not idle, but no HII-RS is detected, the uplink transmission is abandoned. 19. The device according to any one of claims 14-17, characterized in that, the sum of the durations of actual continuous channel occupancy obtained by eNB scheduling for all UEs within the jurisdiction of the eNB including the first UE, less than the set threshold. 20. The device according to any one of claims 14-17, wherein the sending unit is further configured to: If it is learned by the determining unit that the eNB further schedules subframe n+1 for sending uplink data for the apparatus, after sending uplink data on subframe n, continue to send uplink data on subframe n+1. 21. The device according to claim 14 or 17, wherein the HII-RS sent by the sending unit is used to be identified by a homologous UE belonging to the same operator as the device, or/and, using To be identified by a homologous UE belonging to the same serving cell as the device. 22. The device according to claim 21, wherein the HII-RS is a Zadoff-Chu sequence, and the root sequence of the Zadoff-Chu sequence is a function representing an operator identity; or, The HII-RS is a Zadoff-Chu sequence, and the root sequence of the Zadoff-Chu sequence is a function representing the identity of the serving cell; or, The HII-RS is a Zadoff-Chu sequence, and the root sequence of the Zadoff-Chu sequence is a joint function representing an operator ID and a serving cell ID. 23. The device according to claim 21, wherein the HII-RS is a cyclic shift sequence, and the initial phase of the cyclic shift sequence is a function that characterizes the operator identity, or, the HII-RS RS is a tap combination sequence of two cyclic shift sequences, where the initial phase of one cyclic sequence is a function that characterizes the identity of the operator; or, The HII-RS is a cyclic shift sequence, the initial phase of the cyclic shift sequence is a function of the identity of the serving cell, or the HII-RS is a tap combination sequence of two cyclic shift sequences, one of which The initial phase of the cyclic sequence is a function characterizing the identity of the serving cell; or, The HII-RS is a cyclic shift sequence, the initial phase of the cyclic shift sequence is a joint function representing the identity of the operator and the identity of the serving cell, or the HII-RS is a tap of two cyclic shift sequences A combined sequence, wherein the initial phase of a cyclic sequence is a joint function representing the identity of the operator and the identity of the serving cell. 24. The device according to claim 21, wherein when sending the HII-RS, the sending unit is specifically used for: If the HII-RS is used to be identified by a homologous UE belonging to the same operator as the device, map the HII-RS to a first time domain position and a first frequency domain position for transmission; wherein, All UEs under the jurisdiction of the operator to which the device belongs use the first time frequency and the first frequency domain to send the HII-RS; or, If the HII-RS is used to be identified by a homologous UE belonging to the same serving cell as the device, map the HII-RS to a second time domain position and a second frequency domain position for transmission; wherein, All UEs under the jurisdiction of the serving cell to which the device belongs use the second time frequency and the second frequency domain to send the HII-RS; or, If the HII-RS is used to be identified by a homologous UE belonging to the same serving cell of the same operator as the device, map the HII-RS to a third time domain position and a third frequency domain position for Sending; wherein, all UEs under the jurisdiction of the operator to which the device belongs and the serving cell to which the first UE belongs simultaneously use the third time frequency and the third frequency domain to send the HII-RS. 25. The device according to claim 21, wherein the sending unit is further used for: In the process of sending HII-RS, if it is determined that the frequency domain position occupied by sending HII-RS overlaps with the frequency domain position occupied by sending uplink data, then when sending uplink data, do not use the Alternatively, the colliding resource element REs do not use all OFDM symbols in the overlapping area. 26. The device according to claim 21, wherein when sending the HII-RS, the sending unit is specifically used for: Send HII-RS over the entire bandwidth; or Send the HII-RS according to the set frequency domain resource interval on the entire bandwidth; or, The HII-RS is sent on the M PRBs located in the center bandwidth.