WO2016070742A1

WO2016070742A1 - Signal transmission method and device in unauthorized carrier

Info

Publication number: WO2016070742A1
Application number: PCT/CN2015/093122
Authority: WO
Inventors: 苟伟; 彭佛才; 毕峰; 赵亚军
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-11-07
Filing date: 2015-10-28
Publication date: 2016-05-12
Also published as: CN105634700A

Abstract

Disclosed are a signal transmission method and device in an unauthorized carrier, the method comprising: a site determines one or more preset channels configured within a unit period, the unit period being obtained by dividing the unauthorized carrier in a time orientation, and a total time occupied by the one or more preset channels within the unit period is not more than a specified time length ratio of a unit period; the site transmits or receives a data signal and/or a reference signal in the preset channel. The present invention solves the problem in the related technology that an air interface negotiation mechanism cannot be realized between different operators, thus enabling mutual occupation of an unauthorized carrier by base stations, particularly base stations of different operators, enabling said mutual occupation with a high efficiency.

Description

Method and device for transmitting signals in unlicensed carrier

Technical field

The present invention relates to the field of communications, and in particular to a method and apparatus for transmitting signals in an unlicensed carrier.

Background technique

In the process of Long-Term Evolution (LTE), the LTE Rel-13 version began to study. One of the important items in Rel-13 is that the LTE system works with unlicensed carriers. This technology will enable LTE systems to use existing unlicensed carriers, greatly increasing the potential spectrum resources of LTE systems, enabling LTE systems to achieve lower spectrum costs.

However, the use of unlicensed carriers in LTE systems faces numerous problems, some of which are as follows:

When multiple operators deploy LTE systems in the same geographical location to use unlicensed carriers, the LTE system uses the licensed carrier in the same geographical location as the existing multiple carriers, and the former causes the interference between the LTE systems to become different. It is very serious, because in the former, multiple carriers use the same carrier frequency and the same geographical location. In order to solve the above problem, different solutions are proposed: for example, a Clear Channel Assessment (CCA) mechanism is introduced, and the base station needs to follow the principle of “listen before listening” to avoid simultaneous use of non-authorized neighboring base stations. The interference problem caused by the carrier. There is also a suggestion to introduce a negotiation mechanism, but there are country regulations for the use of unlicensed carriers in some countries. For example, in Europe, the one-time use time after the base station is restricted from unauthorized use, such as the maximum usage time of one preemption is 10ms, etc., this is to make the fast negotiation mechanism the most ideal if the negotiation mechanism is adopted. For the negotiation mechanism, it is further divided into the negotiation between the base stations of the same carrier. This is relatively easy to implement. For example, the base station connected through the optical fiber can negotiate quickly or use air interface signaling to negotiate; but for different operators There are major obstacles in the negotiation, mainly because there is no wired connection between the base stations of different operators, and only data can be received or transmitted through the air interface. So how do the different operators negotiate the air interface negotiation mechanism? For example, how does the base station of operator A transmit data signals, and the base station of operator B can be quickly received and is in an unlicensed carrier? One of the problems that need to be overcome here is that, as mentioned above, there are mandatory requirements for the use of unlicensed carriers in some countries: 1. The duration of use of unlicensed carrier usage rights per time is less than 10ms/13ms (for different Frame structure). 2. The “Before Listening and Speaking” principle needs to be implemented before each use of the unlicensed carrier.

For the problem that the air interface negotiation mechanism cannot be implemented between different operators existing in the related art, an effective solution has not been proposed.

Summary of the invention

The embodiment of the invention provides a method and a device for transmitting a signal in an unlicensed carrier, so as to solve at least the problem that the air interface negotiation mechanism cannot be implemented between different operators existing in the related art.

According to an embodiment of the present invention, a method for transmitting a signal in an unlicensed carrier is provided, including: site determination One or more predetermined channels set in a unit period, wherein the unit period is obtained by dividing an unlicensed carrier in a time direction, and the total duration occupied by the one or more predetermined channels is within a unit period Not exceeding a specified proportion of time of the unit period; the station transmits or receives data signals and/or reference signals within the predetermined channel.

In the embodiment of the present invention, the specified ratio includes: 5%.

In an embodiment of the present invention, the predetermined channel satisfies at least one of the following conditions: the predetermined channel occupies an entire bandwidth or a partial bandwidth of a frequency domain in a unit period; the predetermined channel is continuous in a time domain in a unit period or dispersed.

In an embodiment of the present invention, the total duration of the one or more predetermined channels does not exceed a specified proportion of the unit period in the duration of any of the unit periods.

In the embodiment of the present invention, the unit period is obtained by dividing the unlicensed carrier in the time direction, and the station divides the unlicensed carrier into a plurality of consecutive manners according to the unit period duration in a time direction. Unit period.

In the embodiment of the present invention, the structure of the predetermined channel includes one of the following: Structure 1: the predetermined channel includes an agreed sequence sending part, a data sending part or a reference signal sending part; wherein the reference signal includes a cell reference Signal (Cell-specific Reference Signa, CRS for short), Channel State Information Reference Sign (CSI-RS), Positioning Reference Signal (PRS), Discovery Reference Signal (Discovery) One or more of Reference Signal (referred to as DRS); structure 2: the predetermined channel includes a transmitting part, a conversion time part, and a receiving part in time sequence; and structure 3: the predetermined channel includes: receiving in time sequence Partially, a conversion time portion, a transmission portion; Structure 4: the predetermined channel includes an appointment sequence transmission portion, a conversion time portion, and a transmission portion/reception portion.

In the embodiment of the present invention, when the structure of the predetermined channel is the structure 1, the station transmitting or receiving the data signal and/or the reference signal in the predetermined channel includes: having occupied the unlicensed carrier usage right The station transmits occupancy information for the unlicensed carrier in the data sending part, or the station planning to occupy the unlicensed carrier transmits, at the data sending part, occupation information expected to be used for the unlicensed carrier; or, for The station that plans to occupy the unlicensed carrier sends the reference signal to the terminal in the reference signal sending part when the unlicensed carrier is not preempted.

In the embodiment of the present invention, when the structure of the predetermined channel is the structure 2, the station transmitting or receiving the data signal and/or the reference signal in the predetermined channel includes: a site that has occupied the unlicensed carrier, and And/or a station planning to occupy the unlicensed carrier, transmitting, at the transmitting portion, occupancy information for the unlicensed carrier occupation information and/or desiring for the unlicensed carrier; or, having occupied the unlicensed carrier A station and/or a station planning to occupy the unlicensed carrier, receiving, at the receiving portion, occupancy information for the unlicensed carrier and/or occupancy information expected for the unlicensed carrier transmitted by other stations.

In the embodiment of the present invention, when the structure of the predetermined channel is the structure 3, the station transmitting or receiving the data signal and/or the reference signal in the predetermined channel includes: the station receiving the other part in the receiving part The occupancy information sent by the station for the unlicensed carrier and/or the occupation information expected for the unlicensed carrier to determine occupancy information of the site itself for the unlicensed carrier; or the site is The transmitting portion transmits occupancy information for the unlicensed carrier and/or expected occupancy information for the unlicensed carrier.

In the embodiment of the present invention, determining, by the station, its own occupation information for the unlicensed carrier includes: for a station that has occupied the unlicensed carrier or a station that expects occupancy information for the unlicensed carrier, according to The receiving information of the unlicensed carrier is adjusted by the other station received by the receiving part, and the occupation information of the unlicensed carrier is adjusted.

In the embodiment of the present invention, when the structure of the predetermined channel is any one of the structures 1 to 4, the station transmitting or receiving the data signal and/or the reference signal in the predetermined channel includes: the site is And transmitting, when the data signal is sent in the predetermined channel, an agreed sequence and/or the reference signal; the station transmitting, in the agreed sequence sending part, an agreed sequence identifying the predetermined channel or the next predetermined channel, And according to the use of the predetermined channel, the reference signal is sent in the transmitting part, or occupancy information for the unlicensed carrier and/or occupancy information expected for the unlicensed carrier.

In an embodiment of the present invention, the use of the predetermined channel includes one of: identifying a distribution of a received signal portion, a conversion time portion, and a transmission signal portion in the predetermined channel, or a presence or absence of a condition or structure, and identifying the predetermined channel. The type of signal sent.

In the embodiment of the present invention, the station transmitting or receiving the data signal and/or the reference signal in the predetermined channel includes: the station detecting whether the unlicensed carrier has the predetermined channel; and the detecting result is yes In the case, the station transmits the data signal and/or the reference signal by using the predetermined channel; if the detection result is no, the station that has preempted the unlicensed carrier usage right configures the predetermined channel, and Transmitting, by using the predetermined channel, the data signal and/or the reference signal; a station that does not preempt the unlicensed carrier, performing preemption of the use right of the unlicensed carrier, and continuously detecting whether the predetermined channel exists, if After the usage right is seized, when the predetermined channel is still not detected, the predetermined channel is configured, and the data signal and/or the reference signal is sent by using the predetermined channel, or the non-preemption to the non-preemption When the station of the authorized carrier simultaneously confirms that the unlicensed carrier is idle, the base station that does not preempt the unlicensed carrier configures the predetermined channel, and The data signal and/or reference signal is transmitted using the predetermined channel.

In the embodiment of the present invention, the detecting, by the station, whether the unlicensed carrier has the predetermined channel comprises: the station detecting an agreed sequence sent in the predetermined channel, determining, according to the agreed sequence, the unlicensed carrier Whether or not the predetermined channel exists.

In the embodiment of the present invention, the unit period is 20 ms, the duration of the predetermined channel is 1 ms, or the unit period is 10 ms, the duration of the predetermined channel is 0.5 ms, or the unit period is 40 ms. The duration of the predetermined channel is 2 ms.

In the embodiment of the present invention, the time resources in the predetermined channel are divided according to Orthogonal Frequency Division Multiplexing (OFDM) symbols.

In the embodiment of the present invention, when the predetermined channel is 1 ms duration, the predetermined channel determines 2 OFDM symbols to transmit a primary synchronization signal/secondary synchronization signal PSS/SSS of the Long Term Evolution (LTE) system.

In the embodiment of the present invention, the predetermined channel is divided into M groups of orthogonal physical resources, and each group of the physical resources includes all orthogonal frequency division multiplexing OFDM symbols of the predetermined channel, where M is a natural number. .

In the embodiment of the present invention, the number of resource elements (Resource-Element, RE for short) in each OFDM of the predetermined channel is at least L, where L of the REs are The signal energy detection satisfies the specified minimum threshold for the unlicensed carrier to be busy.

In the embodiment of the present invention, the station sends or receives a data signal and/or a reference signal in the predetermined channel, and further includes: a preamble sequence sent in the predetermined channel according to a primary synchronization signal/secondary synchronization signal of LTE (primary snchronization signal/secondary synchronization signal, abbreviated as PSS/SSS) structure transmission; the appointment sequence is equal to a sequence of PSS/SSS in the primary cell corresponding to the unlicensed carrier where the predetermined channel is located.

According to another embodiment of the present invention, there is further provided a transmission device for a signal in an unlicensed carrier, the device being applied to a station, the device comprising: a determining module configured to determine one or more set in a unit period a predetermined channel, wherein the unit period is obtained by dividing an unlicensed carrier in a time direction, and a total duration occupied by the one or more predetermined channels does not exceed a specified proportion of the unit period in a unit period The duration/transmission/reception module is configured to transmit or receive data signals and/or reference signals within the predetermined channel.

In the embodiment of the present invention, the specified ratio includes: 5%.

In the embodiment of the present invention, the determining module includes: a dividing unit, configured to divide the unlicensed carrier into a plurality of the unit periods in a time direction according to the unit period duration.

In the embodiment of the present invention, the structure of the predetermined channel includes one of the following: Structure 1: the predetermined channel includes an agreed sequence sending part, a data sending part or a reference signal sending part; wherein the reference signal includes a cell reference One or more of a signal CRS, a channel state information reference signal CSI-RS, a positioning reference signal PRS, and a discovery reference signal DRS; Structure 2: the predetermined channel includes a transmitting portion, a conversion time portion, and a receiving portion in time series; Structure 3: The predetermined channel includes, in time sequence, a receiving portion, a conversion time portion, and a transmitting portion. Structure 4: the predetermined channel includes an agreed sequence transmitting portion, a conversion time portion, and a transmitting portion/receiving portion.

In the embodiment of the present invention, when the structure of the predetermined channel is the structure 1, the sending/receiving module includes: a first sending unit, configured to be when the station is a site that has occupied the unauthorized carrier usage right, Transmitting, by the data transmitting part, occupancy information for the unlicensed carrier, or a station planning to occupy the unlicensed carrier, in the data sending part, sending occupation information expected to the unlicensed carrier; or, sending And the unit is configured to send the reference signal to the terminal in the reference signal sending part when the station is a station that plans to occupy the unlicensed carrier and does not preempt the unlicensed carrier.

In the embodiment of the present invention, when the structure of the predetermined channel is the structure 2, the sending/receiving module includes: a third sending unit, configured to be a site and/or a plan that has occupied the unlicensed carrier at the site. And vacating the site of the unlicensed carrier, transmitting, at the transmitting portion, the information about the unlicensed carrier and/or desiring for the unlicensed carrier Occupancy information; or, the first receiving unit is configured to receive, at the receiving part, a station sent by another station when the station is a station that has occupied the unlicensed carrier and/or a station that plans to occupy the unlicensed carrier The occupancy information of the unlicensed carrier and/or the occupancy information expected for the unlicensed carrier.

In the embodiment of the present invention, when the structure of the predetermined channel is the structure 3, the sending/receiving module includes: a second receiving unit, configured to receive, at the receiving part, the unlicensed carrier sent by another station Occupancy information and/or occupancy information for the unlicensed carrier; a determining unit configured to determine occupancy information of the site itself for the unlicensed carrier; a fourth transmitting unit configured to be in the transmitting Partially transmitting occupancy information for the unlicensed carrier and/or expecting occupancy information for the unlicensed carrier.

In the embodiment of the present invention, the determining unit is further configured to: for a station that has occupied the unlicensed carrier or a station that desires occupancy information for the unlicensed carrier, according to another station received by the receiving part The occupation information of the unlicensed carrier adjusts the occupation information of the unlicensed carrier.

In the embodiment of the present invention, when the structure of the predetermined channel is any one of the structures 1 to 4, the sending/receiving module includes: a fifth sending unit, configured to send the data in the predetermined channel Transmitting an agreed sequence and/or the reference signal simultaneously; the sixth transmitting unit is configured to transmit, in the agreed sequence transmitting portion, an appointment sequence identifying the predetermined channel or the next predetermined channel, according to the predetermined channel The purpose of transmitting the reference signal, or occupancy information for the unlicensed carrier, and/or occupancy information for the unlicensed carrier, in the transmitting portion.

In the embodiment of the present invention, the device further includes: a detecting module, configured to detect whether the unlicensed carrier has the predetermined channel; and if the detection result is yes, the sending/receiving module is configured to be used Transmitting, by the predetermined channel, the data signal and/or the reference signal; if the detection result is no, the sending/receiving module is configured to configure the predetermined channel by a station that has preempted the unlicensed carrier usage right, and Transmitting, by using the predetermined channel, the data signal and/or the reference signal; a station that does not preempt the unlicensed carrier, performing preemption of the use right of the unlicensed carrier, and continuously detecting whether the predetermined channel exists, if After the usage right is seized, when the predetermined channel is still not detected, the predetermined channel is configured, and the data signal and/or the reference signal is sent by using the predetermined channel, or the non-preemption to the non-preemption When the station that authorizes the carrier simultaneously confirms that the unlicensed carrier is idle, the base station that does not preempt the unlicensed carrier configures the predetermined channel, Using the predetermined channel for transmitting the data signal and / or reference signals.

In the embodiment of the present invention, the detecting module is further configured to detect an agreed sequence sent in the predetermined channel, and determine, according to the agreed sequence, whether the predetermined channel exists in the unlicensed carrier.

In the embodiment of the present invention, time resources in the predetermined channel are divided according to orthogonal frequency division multiplexing OFDM symbols.

In the embodiment of the present invention, the quantity of resource elements RE occupied by each group of the physical resources in each OFDM of the predetermined channel is at least L, wherein the signal energy detection in the L pieces of the REs meets a prescribed location. The unlicensed carrier is the minimum threshold for busy.

In the embodiment of the present invention, the sending/receiving module is further configured to send the agreed sequence sent in the predetermined channel according to the PSS/SSS structure of the LTE; the agreed sequence is equal to the unlicensed carrier where the predetermined channel is located The sequence of PSS/SSS in the corresponding primary cell.

Through the embodiment of the present invention, one or more predetermined channels set in a unit period are determined by using a station, where the unit period is obtained by dividing the unlicensed carrier in the time direction, and the total occupied by one or more predetermined channels The duration does not exceed a specified proportion of the unit period in a unit period; the station transmits or receives data signals and/or reference signals within a predetermined channel. The problem that the air interface negotiation mechanism cannot be implemented between different operators in the related art is solved, and the interaction between the unlicensed carriers occupied by the base stations is realized, especially the base stations between different operators, so that the base stations between different operators Interaction is possible and very efficient.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flowchart of a method of transmitting a signal in an unlicensed carrier according to an embodiment of the present invention;

2 is a first schematic diagram of a period and a predetermined channel duration according to an embodiment of the present invention;

3 is a second schematic diagram of a period and a predetermined channel duration according to an embodiment of the present invention;

4 is a structural block diagram of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention;

5 is a structural block diagram 1 of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention;

6 is a structural block diagram 2 of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention;

7 is a structural block diagram 3 of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention;

8 is a structural block diagram 4 of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention;

9 is a structural block diagram 5 of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention;

10 is a structural block diagram 6 of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention;

11 is a first schematic diagram of a P channel according to an embodiment of the present invention;

FIG. 12 is a first schematic diagram of a P channel including uplink, downlink, and guard intervals according to an embodiment of the present invention; FIG.

FIG. 13 is a second schematic diagram of a P channel including uplink, downlink, and guard intervals according to an embodiment of the present invention; FIG.

FIG. 14 is a second schematic diagram of a P channel according to an embodiment of the present invention; FIG.

FIG. 15 is a schematic diagram of L REs consecutively and orthogonal to each of the OFDM symbols in the frequency domain according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

The following is taken as a base station in the present transmission. In fact, the base station can be replaced by the UE equivalently, and the corresponding scheme is the same.

In this embodiment, a method for transmitting a signal in an unlicensed carrier is provided. FIG. 1 is a flowchart of a method for transmitting a signal in an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps. :

Step S102, the station determines one or more predetermined channels set in a unit period, where the unit period is obtained by dividing the unlicensed carrier in the time direction, and the total duration occupied by the one or more predetermined channels is in the unit period. The specified proportion of time in the unit period is not exceeded;

Step S104, the station transmits or receives a data signal and/or a reference signal in a predetermined channel.

Through the above steps, the station is divided into several unit periods in the time direction of the unlicensed carrier, and a predetermined channel is set in the unit period, and the data signal or the reference signal is transmitted or received through the predetermined channel, compared to the prior art. When an operator uses an unlicensed carrier in the same geographical location, the CCA process needs to be performed, and there is a big obstacle in the negotiation between different operators. In the above step, the non-authorized carrier does not need to perform CCA to directly use the channel. The channel can realize the interaction of the unlicensed carriers between the sites, especially the sites between different operators, making site interaction between different operators possible and highly efficient.

In an alternative embodiment, the above specified ratio includes: 5%. This ensures that the settings of the predetermined channel comply with the relevant mechanisms. In an optional embodiment, the unit period is 20 ms, and the duration of the predetermined channel is 1 ms (as shown in FIG. 2); alternatively, it is a complete LTE subframe; or the unit period is 10 ms, and the duration of the predetermined channel is 0.5ms (as shown in Figure 3); or a unit period of 40ms, the duration of the predetermined channel is 2ms, optionally two consecutive complete LTE subframes.

The predetermined channel used by the above station to transmit or receive a data signal or a reference signal needs to satisfy certain conditions. In an optional embodiment, the predetermined channel occupies the entire bandwidth or part of the bandwidth of the frequency domain, and/or the predetermined channel is in the time domain. Continuous or discrete.

In an optional embodiment, the station divides the unlicensed carriers into consecutive multiples in the time direction according to the unit period duration. The unit period. The total duration of the predetermined channel in one cycle does not exceed 5% of the period duration. In another optional embodiment, the total duration of the predetermined channel included in the duration of any of the unit periods does not exceed the unit time. Specify the proportional duration.

The structure of the predetermined channel may include a plurality of types, which are exemplified below. In an optional embodiment, the predetermined channel includes: the structure of the predetermined channel includes one of the following: Structure 1: the predetermined channel includes the agreed sequence transmitting part a data transmitting portion or a reference signal transmitting portion; wherein the reference signal includes one or more of a cell reference signal CRS, a channel state information reference signal CSI-RS, a positioning reference signal PRS, and a discovery reference signal DRS; structure 2: a predetermined channel The transmission part, the conversion time part, and the receiving part are included in the chronological order; structure 3: the predetermined channel includes, in time sequence, a receiving part, a conversion time part, and a transmitting part; and the structure 4: the predetermined channel includes the agreed sequence transmitting part, and the conversion time Part, send part/receive part.

In an optional embodiment, when the structure of the predetermined channel is the structure 1, the station that has occupied the unlicensed carrier usage right transmits the occupation information for the unlicensed carrier in the data sending part, or plans to occupy the unlicensed carrier. The station transmits the occupation information expected for the unlicensed carrier in the data transmitting portion; or the station for planning to occupy the unlicensed carrier transmits the reference signal in the reference signal transmitting portion when the unlicensed carrier is not preempted Give the terminal.

In an optional embodiment, when the structure of the predetermined channel is structure 2, the station that has occupied the unlicensed carrier and/or the station that plans to occupy the unlicensed carrier, and the information about the unlicensed carrier is sent in the transmitting part. And/or desiring information for the unlicensed carrier; or a station that has occupied the unlicensed carrier and/or a station that plans to occupy the unlicensed carrier, and receives, at the receiving portion, the other station for the unlicensed carrier Occupancy information and/or occupancy information for the unlicensed carrier is expected.

In an optional embodiment, when the structure of the predetermined channel is the structure 3, the station receives, at the receiving part, the occupation information sent by the other station for the unlicensed carrier and/or the occupation information expected for the unlicensed carrier, to Determining the occupancy information of the site's own expectations for the unlicensed carrier; or the station transmitting occupancy information for the unlicensed carrier and/or expected occupancy information for the unlicensed carrier in the transmitting portion. In another optional embodiment, determining, by the station, its own occupation information for the unlicensed carrier includes: for a station that has occupied the unlicensed carrier or a station that expects occupancy information for the unlicensed carrier, according to the receiving part The received information of the unlicensed carrier of the other station adjusts its own occupation information of the unlicensed carrier.

In an optional embodiment, when the structure of the predetermined channel is any one of structures 1 to 4, when the station transmits the data signal in the predetermined channel, the agreed sequence and/or the reference signal are simultaneously transmitted; the station And transmitting, in the agreed sequence transmitting portion, an appointment sequence identifying the predetermined channel or the next predetermined channel, transmitting the reference signal in the transmitting portion according to the use of the predetermined channel, or occupying information and/or expectation for the unlicensed carrier Occupancy information for the unlicensed carrier.

With regard to the use of the predetermined channel involved above, there may be many, in an alternative embodiment, the use of the predetermined channel includes: identifying the portion of the received signal in the predetermined channel, the distribution time portion, and the distribution and presence of the transmitted signal portion, Identifies the type of signal sent in the predetermined channel.

When the station is to transmit data using an unlicensed carrier, in an alternative embodiment, the station detects whether the unlicensed carrier is The predetermined channel exists; if the detection result is YES, the station uses the predetermined channel to transmit the data signal and/or the reference signal; if the detection result is no, the site configuration of the unlicensed carrier usage right has been preempted And the predetermined channel is used to transmit the data signal and/or the reference signal; the station that does not preempt the unlicensed carrier performs the preemption of the use right of the unlicensed carrier, and continuously detects whether the predetermined channel exists, if After the usage right is seized, when the predetermined channel is still not detected, the predetermined channel is configured, and the data signal and/or the reference signal is sent by using the predetermined channel, or the station that does not preempt the unlicensed carrier simultaneously confirms the When the unlicensed carrier is idle, the base station that does not preempt the unlicensed carrier configures the predetermined channel and transmits the data signal and/or the reference signal using the predetermined channel.

In an optional embodiment, the base station determines whether a predetermined channel exists in the unlicensed carrier by detecting the agreed sequence sent in the predetermined channel. For example, when receiving the agreed sequence, the base station determines that a predetermined channel exists in the unlicensed carrier, and does not receive It is judged that the predetermined channel does not exist in the unlicensed carrier when the sequence is agreed.

In an optional embodiment, the time resources in the predetermined channel are divided according to orthogonal frequency division multiplexing OFDM symbols, thereby effectively avoiding the problem of interference when using the unlicensed carrier simultaneously.

In an optional embodiment, when the predetermined channel is 1 ms long, the predetermined channel determines 2 of the OFDM symbols to transmit the PSS/SSS of the LTE.

In an optional embodiment, the predetermined channel is divided into M groups of orthogonal physical resources, and each group of the physical resources includes all orthogonal frequency division multiplexing OFDM symbols of the predetermined channel, where M is a natural number. Optionally, each set of the physical resource occupies at least L number of REs in each OFDM of the predetermined channel, where the signal energy detection in the L of the REs meets a specified minimum threshold of the unlicensed carrier busy.

The above step S104 involves the base station transmitting a data signal or a reference signal in a predetermined channel. In an optional embodiment, the agreed sequence transmitted in the predetermined channel is sent according to the PSS/SSS structure of the Long Term Evolution (LTE) system, optionally, an appointment. The sequence is equal to the sequence of PSS/SSS in the primary cell corresponding to the unlicensed carrier where the predetermined channel is located.

In this embodiment, a device for transmitting signals in an unlicensed carrier is also provided. The device is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

4 is a structural block diagram of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention. The apparatus is applied to a station. As shown in FIG. 4, the apparatus includes: a determining module 22 configured to determine a setting in a unit period. One or more predetermined channels, wherein the unit period is obtained by dividing an unlicensed carrier in a time direction, and the total duration occupied by the one or more predetermined channels does not exceed a specified proportion of the unit period in a unit period The duration/transmission/reception module 24 is configured to transmit or receive data signals and/or reference signals within the predetermined channel.

Optionally, the specified ratio includes: 5%.

Optionally, the predetermined channel satisfies at least one of the following conditions: the predetermined channel occupies the entire bandwidth or part of the bandwidth of the frequency domain in a unit period; the predetermined channel is continuous or discrete in the time domain in a unit period.

Optionally, the total duration of one or more predetermined channels does not exceed a specified proportion of the unit period in the duration of any unit period.

5 is a structural block diagram of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 5, the determining module 22 includes: a dividing unit 222, configured to set an unlicensed carrier according to the unit period duration in time. A plurality of consecutive unit periods are divided in the direction.

Optionally, the structure of the predetermined channel includes one of the following: Structure 1: the predetermined channel includes an appointment sequence transmission part, a data transmission part or a reference signal transmission part; wherein the reference signal includes a cell reference signal CRS, a channel state information reference signal CSI -RS, one or more of the positioning reference signal PRS, the discovery reference signal DRS; structure 2: the predetermined channel includes a transmitting portion, a switching time portion, and a receiving portion in chronological order; and structure 3: the predetermined channel includes in time order: a receiving portion, a conversion time portion, and a transmitting portion; Structure 4: the predetermined channel includes an agreed sequence transmitting portion, a conversion time portion, and a transmitting portion/receiving portion.

6 is a block diagram showing the structure of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 6, when the structure of the predetermined channel is the structure 1, the transmitting/receiving module includes 24: the first transmitting unit 242. The station set to occupy the unlicensed carrier usage right transmits the occupation information for the unlicensed carrier in the data transmitting part, or the station planning to occupy the unlicensed carrier transmits the expected occupation of the unlicensed carrier in the data transmitting part. Information; or, the second sending unit 244, the station set to plan to occupy the unlicensed carrier sends a reference signal to the terminal in the reference signal transmitting part when the unlicensed carrier is not preempted.

7 is a structural block diagram 3 of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 7, when the structure of the predetermined channel is the structure 2, the transmitting/receiving module 24 includes: a third transmitting unit 246. a station that has occupied the unlicensed carrier and/or a station that plans to occupy the unlicensed carrier, and transmits, at the transmitting portion, occupancy information for the unlicensed carrier and/or expected occupancy information for the unlicensed carrier; or, a receiving unit 248, configured as a station that has occupied the unlicensed carrier and/or a station that plans to occupy the unlicensed carrier, where the receiving part receives occupation information and/or expectation for the unlicensed carrier sent by another station for the Occupancy information of unlicensed carriers.

FIG. 8 is a structural block diagram of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 8, when the structure of the predetermined channel is the structure 3, the transmitting/receiving module 24 includes: the second receiving unit 250. Providing, at the receiving portion, receiving occupation information for the unlicensed carrier and/or occupying information for the unlicensed carrier, sent by another station; determining unit 252, configured to determine the site's own expectation for the unlicensed carrier The occupancy information 254 is configured to transmit, at the transmitting portion, occupancy information for the unlicensed carrier and/or expected occupancy information for the unlicensed carrier.

Optionally, the determining unit 252 is further configured to adjust, for the station that has occupied the unlicensed carrier or the station that is expected to occupy the unlicensed carrier, according to the occupation information of the unlicensed carrier of the other station received by the receiving part. Own occupancy information for the unlicensed carrier.

9 is a block diagram 5 of a structure of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 9, when the structure of a predetermined channel is any one of structures 1 to 4, the transmitting/receiving module 24 includes The fifth sending unit 256 is configured to simultaneously transmit the agreed sequence and/or the reference signal when the data signal is sent in the predetermined channel; The sending unit 258 is configured to send, in the agreed sequence sending part, an appointment sequence identifying the predetermined channel or the next predetermined channel, and send the reference signal in the sending part according to the use of the predetermined channel, or occupy the unlicensed carrier Information and/or occupancy information for the unlicensed carrier is expected.

Optionally, the use of the predetermined channel includes one of: identifying a portion of the received signal in the predetermined channel, a distribution of the portion of the conversion time and the portion of the transmitted signal, or a presence or absence of a condition or structure, identifying a type of signal transmitted in the predetermined channel.

10 is a structural block diagram 6 of a signal transmission apparatus in an unlicensed carrier according to an embodiment of the present invention. As shown in FIG. 10, the apparatus further includes: a detecting module 26 configured to detect whether the unlicensed carrier has the predetermined channel; If the detection result is yes, the transmitting/receiving module 24 is configured to transmit the data signal and/or the reference signal using the predetermined channel; if the detection result is negative, the transmitting/receiving module 24 is set to have preempted the non- The station that authorizes the carrier usage right configures the predetermined channel, and uses the predetermined channel to send the data signal and/or the reference signal; the station that does not preempt the unlicensed carrier performs the preemption of the use right of the unlicensed carrier while continuously detecting the Whether the predetermined channel exists, if the predetermined channel is still not detected after the usage right is seized, configuring the predetermined channel, and transmitting the data signal and/or the reference signal by using the predetermined channel, or the pre-emption to the non-preemption When the station of the authorized carrier simultaneously confirms that the unlicensed carrier is idle, the base station that does not preempt the unlicensed carrier configures the predetermined letter. And transmitting the data signal and / or a predetermined channel using the reference signal.

Optionally, the detecting module 26 is further configured to detect an agreed sequence sent in the predetermined channel, and determine, according to the agreed sequence, whether the predetermined channel exists in the unlicensed carrier.

Optionally, the unit period is 20 ms, the duration of the predetermined channel is 1 ms; or the unit period is 10 ms, the duration of the predetermined channel is 0.5 ms; or the unit period is 40 ms, and the duration of the predetermined channel is 2 ms.

Optionally, the time resources in the predetermined channel are divided according to orthogonal frequency division multiplexing OFDM symbols.

Optionally, when the predetermined channel is 1 ms duration, the predetermined channel determines 2 OFDM symbols to transmit a primary synchronization signal/secondary synchronization signal PSS/SSS of the Long Term Evolution (LTE) system.

Optionally, the predetermined channel is divided into M groups of orthogonal physical resources, and each group of the physical resources includes all orthogonal frequency division multiplexing OFDM symbols of the predetermined channel, where M is a natural number.

Optionally, each group of the physical resource occupies at least L number of resource units RE in each OFDM of the predetermined channel, where the signal energy detection in the L pieces of the RE meets the specified unlicensed carrier is busy. Minimum threshold.

Optionally, the sending/receiving module is further configured to send the agreed sequence sent in the predetermined channel according to the PSS/SSS structure of the LTE; the agreed sequence is equal to the PSS in the primary cell corresponding to the unlicensed carrier where the predetermined channel is located. The sequence of the SSS.

The above-described problems in the related art are described below in conjunction with alternative embodiments that incorporate the above-described embodiments and alternative embodiments thereof.

The embodiments of the present invention will be described in detail below with reference to the embodiments, so that how the technical means can be applied to solve the technical problems, and the implementation process of achieving the technical effects can be fully understood and implemented.

In this alternative embodiment, the time direction of the unlicensed carrier is divided into several periods, the period is T, and the channel P (corresponding to the predetermined channel) is set in each period T, and the total duration of P is Tx5% (T times 5%) , for the convenience of description as t), The base station can transmit data signals within the P channel and does not perform the CCA procedure.

The P channel is in the frequency domain, and may be full bandwidth or partial bandwidth. For example, some physical resource blocks (PRBs) are used as P channels. The P channel is in the time domain, and may have a continuous duration of t or a total of several small durations of t.

The P channel may not exceed t for a total duration T in any one of the durations T.

Optionally, the sending protocol sequence is configured in the P channel, and the other base stations determine the starting position of the P channel by detecting the agreed sequence. And arranging the location of the sequence transmission, such as the OFDM symbol location within channel P. A preferred PSS/SSS capable of transmitting LTE by selecting 2 OFDM symbols in the P channel. For example, when the period T is equal to (or is greater than) 20 ms, the P channel duration may be set to 1 ms, which is equal to one subframe of the LTE, and the related data may be transmitted according to the LTE standard. For example, the PSS/SSS may be transmitted according to subframe 0 or subframe 5 of the LTE FDD, and the PSS/SSS at this time may be agreed as a unified sequence.

Optionally, the P channel can be divided into several OFDM symbols in the time domain. Preferably, these OFDM symbols are divided into three parts: an uplink (transmission data portion), a downlink (receive data portion), and a conversion time portion. Also, depending on the different uses of the P channel, the above three parts can be configured to use only one of them. For details, refer to the description in the embodiment.

The P channel may include signals for identification purposes, such as the location of the P channel appointment, the transmission of a different sequence of appointments, the use of the sequence to identify the current P channel (or the P channel of the next cycle), or the structure (ie, the P channel contains Those signals, how these signals are transmitted, the receiving base station can first detect the sequence of the identified area, and then know the purpose of the P channel, so that the base station determines its own processing mode, such as receiving/transmitting resources, receiving/transmitting those signals.

The use of the P channel includes: describing the distribution of the received signal portion, the conversion time portion, and the transmitted data portion in the P channel; and describing the type of the transmitted signal in the P channel.

The time resources in the P channel are divided according to OFDM symbols. Optionally, the OFDM symbol duration is equal to the OFDM duration of LTE.

When the P channel is 1 ms long, the P channel determines 2 OFDM symbols to transmit the PSS/SSS of the LTE, optionally the first/second OFDM symbol bearer.

The P channel is divided into M groups of orthogonal physical resources, and each group of physical resources includes all OFDM symbols of the P channel. Each set of physical resources occupies at least L in each OFDM of the P channel. The signal energy detection in the L REs satisfies the minimum threshold of the specified unlicensed carrier busy.

The sequence sent in the P channel is transmitted according to the PSS/SSS structure of the LTE, and the sequence is equal to the sequence of the PSS/SSS in the primary cell (Pcell) corresponding to the unlicensed carrier where the P channel is located; the reference signal sent in the P channel Includes one or more of CRS, CSI-RS, and PRS.

The structure of the P channel includes one of the following:

Structure 1: The P channel includes an agreed sequence transmission part, a data or a reference signal transmission part. Structure 2: The time sequence in the P channel includes a transmission portion, a conversion time portion, and a reception portion, wherein the conversion time portion is configurable. Structure 3: The time sequence in the P channel includes a receiving portion, a conversion time portion, and a transmitting portion, wherein the conversion time portion is configurable. Structure 4: The P channel includes an agreed sequence transmission portion, a conversion time portion, and a transmission/reception portion. For the above four structures, if the P channel cannot be completely divided, the occupied signal can be sent in the P channel (after the transmission is used to make the unlicensed carrier non-idle, so as to avoid preemption by other base stations or systems, the occupied signal is different. Occupation information can also be replaced by occupancy information). For the conversion time portion, if it exists in the P channel, the conversion time portion is divided into two cases. In the first case, the conversion time part is different for different base stations. For example, if some base stations do not need to convert the time part to adjust the hardware, then these base stations need to transmit the occupation signal in the conversion time part to help realize the unlicensed carrier is busy. status. For a base station that needs to convert the time portion, hardware adjustment can be performed in that portion. The second case is the conversion time part, so the base station can only perform hardware adjustments and cannot send data. At this point, it is possible for other systems to seize the unlicensed carrier, but in the same system (there is no different system), this method can still be used.

The various parts of the above structure can be cycled multiple times within the P channel. The base station can also perform corresponding processing multiple times.

For structure 1: the data or reference signal transmitting part, the data includes occupancy information for an unlicensed carrier sent by a base station that has occupied an unlicensed carrier usage right, or a base station that is scheduled to occupy an unlicensed carrier sends an expected non-authorization Carrier occupancy information. The reference signal transmitting part is mainly used to plan to occupy an unlicensed carrier. When the base station does not preempt the unlicensed carrier, the base station sends a reference signal to perform measurement and synchronization for the subordinate UE.

For structure 2: a base station that has occupied an unlicensed carrier and/or a base station that plans to occupy an unlicensed carrier transmits, at the transmitting portion, occupancy information for unlicensed carrier occupation information and/or expectation for an unlicensed carrier. In the receiving part, the base station receives occupancy information for the unlicensed carrier and/or occupancy information expected for the unlicensed carrier transmitted by the other base station.

For the structure 3: the base station (including the base station planning to use the unlicensed carrier, and unclear the occupancy of the unlicensed carrier by other base stations in the unlicensed carrier), in the receiving part, receiving the occupation information for the unlicensed carrier sent by the other base station And/or expecting occupancy information for the unlicensed carrier to determine its own expected occupancy information for the unlicensed carrier (for base stations that have occupied the unlicensed carrier and base stations that have established occupancy information for the unlicensed carrier), The receiving part receives the occupancy information of other base stations, thereby adjusting its own occupation information.

In the transmitting portion, the base station transmits occupancy information for unlicensed carrier occupancy information and/or desirable for an unlicensed carrier.

The P channel includes an agreed sequence transmission portion, a conversion time portion, and a transmission/reception portion.

For structure 4: the base station transmits an agreed sequence of the P channel or the next P channel (which may also be used to identify the P channel or synchronization purpose) in the agreed sequence transmission part, and then transmits in the transmitting/receiving part according to the use of the P channel. Occupancy information for unlicensed carriers and/or expected occupancy information for unlicensed carriers, or transmission of reference signals. In this case, it is mainly used for base stations that do not preempt to unlicensed carriers, but plan to use unlicensed carriers.

The conversion time portion is mainly used to adjust the radio hardware state of the base station from receiving to transmitting (or from transmitting to receiving). This feature may not be needed if the hardware is more advanced. So this part is optional.

In addition to the above-mentioned four P-channel structures, the P-channel design may be the same as the structure of the existing LTE subframe, for example, the structure may be a subframe structure including primary and secondary synchronization in LTE (for example, under the FDD structure) Subframe 0), or a subframe structure containing primary synchronization (for example, subframe 0 under TDD structure) or a subframe structure including secondary synchronization (for example, TDD junction) Subframe 1), or a normal subframe (for example, subframe 1 of FDD).

The agreed sequence transmission for the above P channel is also optional. In a few cases, such as when the subframe timing of the primary carrier paired with the unlicensed carrier is used to describe the location of the P channel, the sequence may not be transmitted, at which time the station receives The P channel configuration signaling determines the presence and period of the P channel, and the specific time domain position of the P channel is determined by referring to the subframe timing of the primary carrier.

For the base station to use the P channel, it will be executed according to the following procedure.

The base station first detects whether the unlicensed carrier has a P channel. Specifically, the base station (including the base station that preempts the unlicensed carrier usage right and/or the base station that does not preempt the unlicensed carrier usage right) can detect the agreed sequence of transmission in the P channel. Therefore, it is determined whether there is a P channel in the unlicensed carrier; if yes, the base station (including the base station that preempts the unlicensed carrier usage right and the base station that does not preempt the unlicensed carrier usage right) will use the P channel, the specific usage mode, and the different states. The base stations will have different usage procedures according to different purposes or uses and the structure of the P channel. Reference may be made to the description of the P channel structure part described above; if not, the base station will perform the following two ways respectively: In the first mode, the base station that has preempted the unlicensed carrier usage right divides the unlicensed carrier period and configures the P channel. Corresponding operations are performed in the P channel as required according to the description of the foregoing structural part. In the second mode, the base station that does not preempt the unlicensed carrier performs the preemption of the use right of the unlicensed carrier and continuously detects whether the P channel exists. If the P channel is still not found after the usage right is seized, the base station follows the base station. The first way is to execute. Or, when the unlicensed base station is not preempted and the non-authorization is idle, the base station divides the unlicensed carrier period and configures the P channel, and performs corresponding operations according to the description of the foregoing structural part in the P channel according to requirements.

The P channel in the text is actually a physical resource, so it can also be a P physical resource. The site to which this document belongs includes a base station or a UE.

In the alternative embodiment, the base station is replaced by a terminal, and the above solution is also applicable.

In an optional embodiment, it is assumed that the base station 1 is the first base station in the geographic location A to start using the unlicensed carrier (this can determine the first to start using the unlicensed carrier according to the actual deployment situation of the operator of the geographical location A. Base station), the base station 1 determines the period T, and starts to determine the time-continuous channel P in the period T, the duration of the duration of the P is t, and the full bandwidth. The base station 1 divides the channel P according to the OFDM symbol duration of LTE (other OFDM symbol durations are also possible). The base station 1 transmits an agreed sequence in the OFDM symbols agreed in the channel P, which sequence is used by other base stations to determine the location of the P channel in the unlicensed carrier. For example, the base station 1 determines that the period T is 20 ms, and the duration t of the P channel is 1 ms. According to the LTE standard, the P channel is exactly equal to one subframe duration and is divided into 14 OFDM symbols. FIG. 11 is a first schematic diagram of a P channel according to an embodiment of the present invention. FIG. 11 is a schematic diagram of a P channel.

The P channel can be further divided into P channels for different purposes according to the period, for example, a P channel for transmitting data, a P channel for receiving data, or a P channel for other purposes (for example, a P channel for synchronous tracking and a P channel for RRM measurement), Obviously, the data format sent in the P channel is different depending on the purpose.

Alternatively, more different sequences may be agreed to identify P channels for different purposes. For example, sequence 1 is transmitted in the P channel of the synchronous tracking, and sequence 2 is transmitted on the P channel receiving the data, so that other base stations can determine to perform corresponding operations in the corresponding P channel according to the difference of the sequence. The specific transmission position of the sequence in the P channel can be agreed in advance, so It is convenient for the receiving end to determine the starting point of the P channel.

Alternatively, the sequence may be used in different P channel frequency domain locations to describe the corresponding P channel usage.

Alternatively, the use of the P channel can also be determined by the numbering of different periods. The number of the P channel is also transmitted in the P channel.

When the base station uses the unlicensed carrier, the base station determines whether the P channel exists in the unlicensed carrier by detecting the P channel. If yes, the base station can use the P channel to perform related data transmission or reception without performing a CCA process, for example, transmitting a measurement signal. Synchronization signal, negotiation information occupying an unlicensed carrier. Specifically, the P channel may be a resource that can be used by multiple base stations, so it is necessary to ensure orthogonality or code division of resources between multiple base stations. For example, the P channel is divided into a number of small resources (the number of base stations that can use the unlicensed carrier in the vicinity), each resource establishes a one-to-one correspondence with the subordinate cells of the base station, and then the base station determines that it is in the P channel according to the correspondence. The location of the resource sent. If not, the base station can divide and transmit the P channel according to the divided period.

If the P channel is available to a plurality of base stations, the RE positions of the reference signals transmitted by different base stations may be orthogonal if the relevant reference signals are transmitted for measurement and synchronization purposes. In this way, UEs subordinate to different base stations can each receive corresponding reference signals for measurement.

In another alternative embodiment, the signaling of the P channel is described as a UE.

The purpose of the P channel is different, and the corresponding transmitted signals are also different. When the P channel is used for transmitting measurement and synchronization (including fine synchronization), since the object of receiving data in the P channel is a subordinate terminal of the base station, the P channel only needs to consider how the base station transmits, and does not need to consider the base station reception.

The P channel can carry different reference signals according to different requirements, and can also carry multiple reference signals and sequences simultaneously. For example, when performing RRM measurement by using the P channel, the base station may be configured to send CRS and/or CSI-RS in the P channel, and may also add a sequence for synchronization, such as PSS/SSS in LTE, mainly to help the UE and the UE. The base station synchronizes and then facilitates RE location resolution of the CRS and/or CSI-RS. The UE may detect the base station transmitting sequence in the P channel by using the period T set by the base station (this parameter may be solidified by the protocol or notified to the UE, so that the UE can detect the P channel) (the sequence may be notified to the UE, or if the sequence is PSS/ In the SSS, the base station agrees to adopt the same sequence as the PSS/SSS of the Pcell of the UE, and then determines the starting position of the P channel, such as the starting OFDM symbol position, according to the sequence, thereby calculating other OFDM symbol positions in the P channel. Therefore, according to the mapping pattern of the reference signal, the RE position of the reference signal is determined, and finally the reference signal in the P channel is obtained. Obviously, when the P channel in the optional embodiment is used, the base station does not need to perform the CCA mechanism, so that the base station can send data through the P channel in the unlicensed carrier without preempting the unlicensed carrier. In this way, the UE subordinate to the base station can also perform Radio Resource Management (RRM) measurement on the unlicensed carrier that may be used in the future through the P channel, so that when the base station preempts the unlicensed carrier, it can be based on the RRM of the previous UE. The measurement results, a quick decision to use unlicensed carriers for those UE configurations. Similarly, the UEs under the base station can also perform synchronization and synchronization maintenance through the P channel, so that when the base station preempts the unlicensed carrier, the UE can quickly synchronize with the unlicensed carrier, so that the base station can start scheduling UE data at the first time. Sending; similarly, the UE subordinate to the base station can also perform CSI measurement through the P channel, so that when the base station preempts the unlicensed carrier, the base station can directly determine the scheduling modulation and coding according to the CSI measurement result of the UE through the P channel. The Modulation and Code Scheme (MCS) level, so that the base station obtains the appropriate MCS level for the UE's first transmission data, and improves the transmission efficiency.

The period T configured by the base station is sent to the UE through the Pcell of the UE. Specifically, the configuration message of the Scell is used, or the activation/deactivation information of the Scell is used to notify the UE. For example, a new parameter T is added to the configuration message of the Scell, or the bit in the activated/deactivated MAC CE of the SCell describes the value of the parameter T.

Further, in order to prevent all UEs under the base station from performing measurement on the P channel in the unlicensed carrier, the base station may select a part of the UE. The base station uses the dedicated RRC message to notify the partial UE to perform measurement for the P channel through the Pcell, and may also notify the P channel. A periodicity, or a transmission sequence in a P channel, or a reference signal transmitted in a P channel (or related information of a reference signal configuration). In this way, only the UE receiving the notification from the base station performs the above measurement, thereby reducing the impact on the UE that does not apply the unlicensed carrier.

In another alternative embodiment, interaction between base stations using a P channel is described.

The base station 1 that preempts the unlicensed carrier usage right can transmit the occupation information occupied by the unlicensed carrier by the P channel, for example, the duration (continuous occupation) information of the unlicensed carrier and/or the subframe pattern information occupying the unlicensed carrier.

The base station 2 that is to preempt the unlicensed carrier can receive the occupation information transmitted by the base station 1 in the P channel, and then calculate its own occupation information according to the occupancy information, and then transmit the occupation information in the P channel. Specifically, the own occupation information is calculated. For example, the base station 2 determines, in a subframe other than the subframe pattern in which the base station 1 occupies the unlicensed carrier, the subframe pattern that occupies the unlicensed carrier, forms the subframe pattern information, and is in the P channel. Sent in.

It is also possible to stipulate that different base stations occupy a series of unlicensed carriers according to the orthogonal subframe pattern. For example, there are N base stations in the neighboring stations, and there are N orthogonal subframe patterns, and the numbers are 0 to N-1, and each base station A series of subframes in the time direction may be occupied by number, and the number information (or the agreed sequence corresponding to the number) is transmitted on the P channel. For example, each orthogonal sub-frame pattern is described by a period and an offset. The offset is 0 to N-1, and the subframe 0 of frame 0 is offset 0.

FIG. 12 is a first schematic diagram of a P channel including uplink, downlink, and guard intervals according to an embodiment of the present invention. As shown in FIG. 12, the transmission of the P signal includes uplink, downlink, and guard intervals. Since the P channel is shared by multiple base stations, from the perspective of different base stations, some base stations may be regarded as uplinks, and other base stations may be downlink. For convenience of description, the present application may be marked as a transmitting part and a receiving part. , conversion time part. The conversion part is optional. For example, after the base station 1 preempts the unlicensed carrier, the base station 1 can use the resources of the transmitting part to transmit its own occupation information in the P channel, and receive the occupation information of the non-authorized carrier that is sent by other base stations in the receiving part of the P channel. FIG. 13 is a second schematic diagram of a P channel including uplink, downlink, and guard interval according to an embodiment of the present invention. As shown in FIG. 13, the P channel may also be designed according to FIG. The conversion time portion at this time is also optional, and the deletion is actually working, but the performance is slightly affected.

In a part of the resources of the transmitting part of the P channel, the base station optionally transmits a sequence of appointments, so that other base stations can detect the sequence to determine the P channel position.

In another alternative embodiment, another interaction mechanism is provided.

FIG. 14 is a second schematic diagram of a P channel according to an embodiment of the present invention. As shown in FIG. 14, the P channel is divided into three parts: an identification area, which is used to identify the purpose of the current P channel (similar to the above optional embodiment). The purpose and use of the P channel can be determined by the information sent in the identification area. The conversion time part is mainly for reserving a certain period of time so that the base station can adjust the status of the transmitted/received power amplifier or parsing the information of the identification area, and the part is optional, that is, it may not exist. The transmitting/receiving part is used to send or receive a data part, which is consistent with the use of the identification area identifier. How the three parts are deployed in the P channel is not strictly limited, but should be standardized so that the base station can accurately know the physical location of the identified area in the P channel. FIG. 14 only gives an optimal indication. The base station first receives the identification area information in the P channel, and learns the purpose of the P channel, thereby receiving or transmitting data in the P channel according to the use.

This alternative embodiment can also be used between a base station and a subordinate UE.

In another alternative embodiment, which is a modification of the above embodiment, the P-channel identified by the identification area of the P channel in the above embodiment is defined as the use of the next upcoming P channel. The main purpose of such is that for a base station (or UE) with low processing capability, there can be more sufficient parsing and data processing time to be transmitted (the size is approximately equal to the period T duration). The transition time portion of the P channel at this time is also optional.

The base station (or UE) receives the information of the identified area in the current P channel, determines the purpose of the next P channel, and transmits/receives data in the next P channel as needed, and the data may occupy the occupied information of the unlicensed carrier.

In another alternative embodiment, another scheme for utilizing a P channel for unlicensed carrier occupancy information interaction is provided.

The resources of the P channel are divided into M groups of independent physical resources, where M is the maximum number of base station interaction base stations supported (the different bandwidths may have different values of M). The independent physical resource division of the M group needs to satisfy the principle of orthogonality to each other. Further, any group of M independent resources can cover all OFDM symbol resources of the P channel, so as to ensure that other systems detect the P channel, and the detection result is that the channel is busy, so that other systems can be prevented from preempting unauthorized during the P channel. Carrier. The number of REs occupied by any one of the M groups of independent resources in one OFDM symbol satisfies at least the following condition: that is, when an RE transmission signal greater than or equal to L is transmitted in one OFDM symbol, other stations will detect that the OFDM symbol is busy (this The specific L number is related to the detection conditions and threshold sizes defined in the standard (different bandwidths are slightly different). This information can be found in the standardized measurement specifications, so L is available, different bandwidths may have different values), then It can be determined that any one of the M sets of independent resources occupies at least L in an OFDM symbol.

An M-group independent resource design, in which the number of REs allocated in the frequency domain direction in each OFDM symbol of the P channel is L (may be greater than L), wherein L REs may be continuous or discrete, and L of each OFDM symbol The positions of the REs in the frequency domain may be the same or orthogonal. The data sent in each group of resources may be a predetermined sequence. FIG. 15 is a schematic diagram of L REs consecutively and orthogonal to each of the OFDM symbols in the frequency domain according to an embodiment of the present invention. Both frequency domain dispersion and time domain dispersion can improve the channel's anti-interference ability, but it also increases the complexity and needs to be considered.

The M group resource needs to be associated with the M base station recommendations. For example, the M group resources are respectively given numbers. The base station first detects the resource group in the P resource that does not send data, and then selects one or more resource groups to use, and in the corresponding resource group. Send data in.

In this alternative embodiment, a common resource may be reserved in advance to facilitate the base station to discover the location of the P channel. For example, if the location of the LTE PSS/SSS is reserved in advance, each base station can transmit its own PSS/SSS at the location. The base station can detect the energy or sequence of the PSS/SSS to determine the location of the P channel.

In summary, the optional embodiment provides a channel that can be directly used without performing CCA on an unlicensed carrier, and the interaction between the base stations and the unlicensed carrier can be realized through the channel, especially different operations. Base stations between quotients make base station interaction between different operators possible and very efficient. The base station can also transmit the relevant reference signal when the unlicensed carrier is not occupied, so that the UE can measure the channel quality of the unlicensed carrier in the future by the UE, thereby improving the usage efficiency after the base station occupies the unlicensed carrier.

In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments.

In another embodiment, a storage medium is further provided, wherein the software includes the above-mentioned software, including but not limited to: an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The technical solution provided by the embodiment of the present invention determines, by using a station, one or more predetermined channels set in a unit period, where the unit period is obtained by dividing an unlicensed carrier in a time direction, and one or more predetermined channels are used. The total duration of occupancy does not exceed a specified proportion of the unit period in a unit period; the station transmits or receives data signals and/or reference signals within a predetermined channel. The problem that the air interface negotiation mechanism cannot be implemented between different operators in the related art is solved, and the interaction between the unlicensed carriers occupied by the base stations is realized, especially the base stations between different operators, so that the base stations between different operators Interaction is possible and very efficient.

Claims

A method for transmitting signals in an unlicensed carrier, comprising:

Determining, by the station, one or more predetermined channels set in a unit period, wherein the unit period is obtained by dividing an unlicensed carrier in a time direction, and the total duration occupied by the one or more predetermined channels is in units The specified proportion of time in the period of the unit is not exceeded in the period;

The station transmits or receives data signals and/or reference signals within the predetermined channel.
The method of claim 1 wherein said specified ratio comprises: 5%.
The method of claim 1, wherein the predetermined channel satisfies at least one of the following conditions:

The predetermined channel occupies the entire bandwidth or part of the bandwidth of the frequency domain in a unit period;

The predetermined channel is continuous or discrete in the time domain during a unit period.
The method of claim 1, wherein the total duration of the one or more predetermined channels does not exceed a specified proportion of time of the unit period during the duration of any of the unit periods.
The method according to claim 1, wherein the unit period is obtained by dividing an unlicensed carrier in a time direction:

The station divides the unlicensed carrier into a plurality of the unit periods in a time direction according to the unit period duration.
The method of claim 1 wherein the structure of the predetermined channel comprises one of:

Structure 1: the predetermined channel includes an appointment sequence transmission part, a data transmission part or a reference signal transmission part; wherein the reference signal includes a cell reference signal CRS, a channel state information reference signal CSI-RS, a positioning reference signal PRS, and a discovery One or more of the reference signals DRS;

Structure 2: the predetermined channel includes a transmitting part, a conversion time part, and a receiving part in a time sequence;

Structure 3: the predetermined channel includes, in time sequence, a receiving part, a conversion time part, and a transmitting part;

Structure 4: The predetermined channel includes an agreed sequence transmission portion, a conversion time portion, and a transmission portion/reception portion.
The method according to claim 6, wherein, when the structure of the predetermined channel is structure 1, the station transmitting or receiving data signals and/or reference signals in the predetermined channel comprises:

A station that has occupied the unlicensed carrier usage right transmits occupancy information for the unlicensed carrier in the data transmitting portion, or a station that plans to occupy the unlicensed carrier transmits a desired in the data transmitting portion for the non- Authorized carrier occupancy information; or,

The station for planning to occupy the unlicensed carrier transmits the reference signal to the terminal in the reference signal sending portion when the unlicensed carrier is not preempted.
The method according to claim 6, wherein, when the structure of the predetermined channel is structure 2, the station transmitting or receiving data signals and/or reference signals in the predetermined channel comprises:

a station that has occupied the unlicensed carrier and/or a station that plans to occupy the unlicensed carrier, and transmits, at the transmitting portion, occupancy information for the unlicensed carrier occupation information and/or desired for the unlicensed carrier; or,

a site that has occupied the unlicensed carrier and/or a station that plans to occupy the unlicensed carrier, and receives, at the receiving portion, occupancy information for the unlicensed carrier sent by other stations and/or desires for the unauthorized Carrier occupancy information.
The method according to claim 6, wherein, when the structure of the predetermined channel is structure 3, the station transmitting or receiving data signals and/or reference signals in the predetermined channel comprises:

The station receives occupancy information for the unlicensed carrier and/or occupancy information expected for the unlicensed carrier sent by another station at the receiving portion to determine the site's own expectation for the unlicensed carrier. Occupation information; or,

The station transmits occupancy information for the unlicensed carrier occupancy information and/or desired for the unlicensed carrier at the transmitting portion.
The method according to claim 9, wherein determining the occupancy information of the site itself for the unlicensed carrier comprises:

For the station that has occupied the unlicensed carrier or the station that is expected to occupy the information of the unlicensed carrier, adjust the occupation information of the non-authorized carrier by other stations received by the receiving part, and adjust the self to the non-authorized carrier. Authorized carrier occupancy information.
The method according to claim 6, wherein, when the structure of the predetermined channel is any one of structures 1 to 4, the station transmitting or receiving data signals and/or reference signals in the predetermined channel comprises:

Sending, by the station, the agreed sequence and/or the reference signal when transmitting the data signal in the predetermined channel;

The station transmits an appointment sequence identifying the predetermined channel or the next predetermined channel in a preamble sequence transmitting portion, and transmitting the reference signal in the transmitting portion according to the use of the predetermined channel, or Occupancy information of the licensed carrier and/or occupancy information expected for the unlicensed carrier.
The method of claim 11 wherein the use of the predetermined channel comprises one of the following:

Identifying a distribution or presence or absence of a received signal portion, a conversion time portion, and a transmitted signal portion of the predetermined channel, or identifying a type of the transmitted signal in the predetermined channel.
The method of claim 1 wherein said station transmitting or receiving data signals and/or reference signals within said predetermined channel comprises:

The station detects whether the unlicensed carrier has the predetermined channel;

In case the detection result is yes, the station transmits the data signal and/or the reference signal using the predetermined channel;

If the detection result is negative, the station that has preempted the unlicensed carrier usage right configures the predetermined channel, and uses the predetermined channel to send the data signal and/or the reference signal; And the station that authorizes the carrier, while performing preemption of the use right of the unlicensed carrier, continuously detecting whether the predetermined channel exists, and if the predetermined channel is still not detected after the usage right is seized, configuring the predetermined And not using the predetermined channel to transmit the data signal and/or the reference signal, or the station not preempting the unlicensed carrier simultaneously confirms that the unlicensed carrier is idle, the non-preemption to the A base station of an unlicensed carrier configures the predetermined channel and transmits the data signal and/or reference signal using the predetermined channel.
The method of claim 13, wherein the detecting, by the station, whether the unlicensed carrier has the predetermined channel comprises:

The station detects an appointment sequence sent in the predetermined channel, and determines whether the predetermined channel exists in the unlicensed carrier according to the agreed sequence.
The method according to any one of claims 1 to 14, wherein the unit period is 20 ms, the duration of the predetermined channel is 1 ms; or the unit period is 10 ms, and the duration of the predetermined channel is 0.5 ms. Or the unit period is 40 ms, and the duration of the predetermined channel is 2 ms.
The method according to any one of claims 1 to 14, wherein time resources in the predetermined channel are divided according to orthogonal frequency division multiplexing OFDM symbols.
The method according to claim 14, wherein when the predetermined channel is 1 ms long, the predetermined channel determines 2 of the OFDM symbols to transmit a primary synchronization signal/secondary synchronization signal PSS/ of the Long Term Evolution (LTE) system. SSS.
The method according to any one of claims 1 to 14, wherein the predetermined channel is divided into M sets of orthogonal physical resources, each set of the physical resources including all orthogonal frequency divisions of the predetermined channel The OFDM symbol is multiplexed, where M is a natural number.
The method according to claim 18, wherein each of said sets of said physical resources occupies at least L of resource elements RE in each OFDM of said predetermined channel, wherein signal energy detection in said L of said REs The specified minimum threshold for the unlicensed carrier to be busy.
The method of claim 1 wherein said station transmitting or receiving data signals and/or reference signals within said predetermined channel further comprises:

The agreed sequence transmitted in the predetermined channel is sent according to the PSS/SSS structure of the LTE;

The agreed sequence is equal to a sequence of PSS/SSS in the primary cell corresponding to the unlicensed carrier where the predetermined channel is located.
A transmission device for signals in an unlicensed carrier, the device being applied to a station, the device comprising:

a determining module, configured to determine one or more predetermined channels set in a unit period, wherein the unit period is obtained by dividing an unlicensed carrier in a time direction, and the one or more predetermined channels are occupied The total duration does not exceed the specified proportion of the unit period in the unit period;

A transmit/receive module configured to transmit or receive data signals and/or reference signals within the predetermined channel.
The apparatus of claim 21, wherein the specified ratio comprises: 5%.
The apparatus of claim 21, wherein the predetermined channel satisfies at least one of the following conditions:

The predetermined channel occupies the entire bandwidth or part of the bandwidth of the frequency domain in a unit period;

The predetermined channel is continuous or discrete in the time domain during a unit period.
The apparatus of claim 21, wherein the total duration of the one or more predetermined channels does not exceed a specified proportional duration of the unit period for a duration of any of the unit periods.
The apparatus of claim 21 wherein said determining module comprises:

The dividing unit is configured to divide the unlicensed carrier into a plurality of the unit periods in a time direction according to the unit period duration.
The apparatus of claim 21, wherein the structure of the predetermined channel comprises one of the following:

Structure 1: the predetermined channel includes an appointment sequence transmission part, a data transmission part or a reference signal transmission part; wherein the reference signal includes a cell reference signal CRS, a channel state information reference signal CSI-RS, a positioning reference signal PRS, and a discovery One or more of the reference signals DRS;

Structure 2: the predetermined channel includes a transmitting part, a conversion time part, and a receiving part in a time sequence;

Structure 3: the predetermined channel includes, in time sequence, a receiving part, a conversion time part, and a transmitting part;

Structure 4: The predetermined channel includes an agreed sequence transmission portion, a conversion time portion, and a transmission portion/reception portion.
The apparatus according to claim 26, wherein, when the structure of said predetermined channel is structure 1, said transmitting/receiving module comprises:

a first sending unit, configured to: when the station is a site that has occupied the unlicensed carrier usage right, send the occupation information of the unlicensed carrier in the data sending part, or the planned occupation in the station And transmitting, by the data sending part, the occupation information expected to be used for the unlicensed carrier; or

And a second sending unit, configured to: at the station, a station that plans to occupy the unlicensed carrier, and send the reference signal to the terminal in the reference signal sending part when the unlicensed carrier is not preempted.
The apparatus according to claim 26, wherein said transmitting/receiving when said predetermined channel structure is structure 2 Modules include:

a third sending unit, configured to: when the station is a station that has occupied the unlicensed carrier and/or a station that plans to occupy the unlicensed carrier, send, in the sending part, information about the unlicensed carrier occupation and / or expect occupancy information for the unlicensed carrier; or,

a first receiving unit, configured to: when the station is a station that has occupied the unlicensed carrier and/or a station that plans to occupy the unlicensed carrier, receive, by the receiving part, the non-authorization sent by another station Occupancy information of the carrier and/or occupancy information expected for the unlicensed carrier.
The apparatus according to claim 26, wherein, when the structure of said predetermined channel is structure 3, said transmitting/receiving module comprises:

a second receiving unit, configured to receive, at the receiving part, occupancy information for the unlicensed carrier sent by another station and/or occupation information expected for the unlicensed carrier;

a determining unit, configured to determine occupancy information of the site's own expectations for the unlicensed carrier;

And a fourth sending unit, configured to send, at the transmitting part, occupancy information for the unlicensed carrier occupation information and/or desired for the unlicensed carrier.
The apparatus according to claim 29, wherein said determining unit is further configured to, according to a station that has occupied the unlicensed carrier or a station that desires occupancy information for the unlicensed carrier, according to the other received by the receiving portion The station adjusts the occupation information of the unlicensed carrier by occupying the occupation information of the unlicensed carrier.
The apparatus according to claim 26, wherein, when the structure of said predetermined channel is any one of structures 1 to 4, said transmitting/receiving module comprises:

a fifth sending unit, configured to simultaneously transmit the agreed sequence and/or the reference signal when the data signal is sent in the predetermined channel;

a sixth sending unit, configured to send, in an agreed sequence sending part, an appointment sequence that identifies the predetermined channel or the next predetermined channel, and sends the reference signal in the sending part according to the use of the predetermined channel, or Occupancy information for the unlicensed carrier and/or occupancy information expected for the unlicensed carrier.
The apparatus of claim 31 wherein the use of the predetermined channel comprises one of:

Identifying a distribution or presence or absence of a received signal portion, a conversion time portion, and a transmitted signal portion of the predetermined channel, or identifying a type of the transmitted signal in the predetermined channel.
The device of claim 21, wherein the device further comprises:

a detecting module, configured to detect whether the unlicensed carrier has the predetermined channel;

In the case where the detection result is YES, the transmitting/receiving module is configured to transmit the data signal and/or the reference signal using the predetermined channel;

If the detection result is no, the sending/receiving module is configured to pre-empt the site of the unlicensed carrier usage right to configure the predetermined channel, and send the data signal and/or reference by using the predetermined channel. a signal; a station that does not preempt the unlicensed carrier, performs preemption of the usage right of the unlicensed carrier, and continuously detects whether the predetermined channel exists. If the usage right is seized, the When the channel is reserved, configuring the predetermined channel, and transmitting the data signal and/or the reference signal by using the predetermined channel, or the station not preempting the unlicensed carrier simultaneously confirms that the unlicensed carrier is idle And the base station that does not preempt the unlicensed carrier configures the predetermined channel, and sends the data signal and/or the reference signal by using the predetermined channel.
The apparatus according to claim 33, wherein said detecting module is further configured to detect an appointment sequence transmitted in said predetermined channel, and determine whether said predetermined channel exists in said unlicensed carrier based on said agreed sequence.
The apparatus according to any one of claims 21 to 34, wherein said unit period is 20 ms, said predetermined channel has a duration of 1 ms; or said unit period is 10 ms, and said predetermined channel has a duration of 0.5 ms Or the unit period is 40 ms, and the duration of the predetermined channel is 2 ms.
The apparatus according to any one of claims 21 to 34, wherein time resources in the predetermined channel are divided according to orthogonal frequency division multiplexing OFDM symbols.
The apparatus according to claim 34, wherein said predetermined channel determines 2 said OFDM symbols to transmit a primary synchronization signal/secondary synchronization signal PSS/ of said Long Term Evolution (LTE) system when said predetermined channel is 1 ms long SSS.
The apparatus according to any one of claims 21 to 34, wherein the predetermined channel is divided into M sets of orthogonal physical resources, each set of the physical resources including all orthogonal frequency divisions of the predetermined channel The OFDM symbol is multiplexed, where M is a natural number.
The apparatus according to claim 38, wherein each of said sets of said physical resources occupies at least L of resource unit REs in each OFDM of said predetermined channel, wherein signal energy detection in said L of said REs The specified minimum threshold for the unlicensed carrier to be busy.
The apparatus according to claim 21, wherein said transmitting/receiving module is further configured to transmit an appointment sequence transmitted in said predetermined channel in accordance with a PSS/SSS structure of LTE; said appointment sequence being equal to a location of said predetermined channel A sequence of PSS/SSS in the primary cell corresponding to the unlicensed carrier.