CN110190939B

CN110190939B - Method and device for transmitting uplink control signaling in LAA transmission

Info

Publication number: CN110190939B
Application number: CN201910382280.XA
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2015-12-19
Filing date: 2015-12-19
Publication date: 2021-07-27
Anticipated expiration: 2035-12-19
Also published as: CN110190939A; CN106899395A; CN106899395B

Abstract

The invention provides a transmission method and a device of uplink control signaling in LAA transmission. The UE receives a first high-level signaling in the first step, wherein the first high-level signaling indicates L candidate carriers; receiving a first signaling in step two; second signaling is sent on the first carrier in step three, the carrier used for transmitting the second signaling being indicated by the first signaling. Wherein the first signaling is physical layer signaling, the second signaling comprises at least one of { scheduling request, K1 CSI groups, K2 HARQ-ACK groups }, and the second signaling is transmitted on a physical layer control channel. The L candidate carriers include at least one carrier deployed on an unlicensed spectrum. The first carrier is one of the L candidate carriers. The invention ensures that the time sequence of the uplink control signaling on the LAA carrier wave is not changed due to LBT, and maintains compatibility with the prior system to the maximum extent. In addition, the invention saves the redundancy overhead of high-level signaling.

Description

Method and device for transmitting uplink control signaling in LAA transmission

The present application is a divisional application of the following original applications:

application date of the original application: 2015, 12 months and 19 days

- -application number of the original application: 201510963011.4

The invention of the original application is named: method and device for transmitting uplink control signaling in LAA transmission

Technical Field

The present invention relates to a scheme for communication using an Unlicensed Spectrum in a wireless communication system, and more particularly, to a communication method and apparatus for transmitting uplink information over an Unlicensed Spectrum (Unlicensed Spectrum).

Background

In a conventional 3GPP (3rd Generation Partner Project) LTE system, data transmission can only occur on a licensed spectrum, however, with a drastic increase in traffic, especially in some urban areas, the licensed spectrum may be difficult to meet the traffic demand. The 62-time congress of the 3GPP RAN discusses a new research topic, namely the research on unlicensed spectrum synthesis (RP-132085), and the main purpose is to research Non-standalone (Non-standalone) deployment using LTE over unlicensed spectrum, where communication over unlicensed spectrum is to be associated with serving cells over licensed spectrum. In RAN #64 congress (seminar), communication over unlicensed spectrum is uniformly named LAA (licensed Assisted Access). LBT (Listen Before Talk) technology is adopted by LAA to avoid multiple transmitters transmitting signals on the same time-frequency resource. Enhanced LAA is formally established over 70 congress of 3GPP RAN, where uplink transmission on LAA carriers is a research focus.

In conventional LTE (Long Term Evolution ) LAA communication, PUCCH cannot be transmitted on the LAA carrier. Considering that the LAA may be extended to DC (Dual Connectivity) communication in the future, one issue to be considered is how PUCCH (Physical Uplink Control Channel) information is transmitted on the LAA carrier.

Disclosure of Invention

Due to the use of LBT techniques, a UE (User Equipment) typically performs LBT operations before sending PUCCH information. The inventors have found through research that LBT operation may cause the UE to Drop (Drop) transmission on a given PUCCH. However, HARQ (Hybrid Automatic Repeat Request) -ACK carried on the PUCCH usually has strict timing requirements, that is, uplink HARQ-ACK dropping may have a large impact on the base station.

The present invention provides a solution to the above problems. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE (User Equipment) of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.

The invention discloses a method for supporting UE (user equipment) communicating on an unlicensed spectrum, which comprises the following steps:

-step a. receiving first higher layer signalling indicating L candidate carriers

-step b. The first signaling includes an index of the first carrier or the first signaling is transmitted on the first carrier.

-step c. sending second signalling on the first carrier, the carrier used for transmitting the second signalling being indicated by the first signalling.

The first signaling is physical layer signaling, the second signaling comprises at least one of { scheduling request, K1 CSI groups, and K2 HARQ-ACK groups }, the K1 CSI groups respectively aim at K1 carriers, the CSI groups comprise a positive integer number of CSI, the K2 HARQ-ACK groups are respectively used for indicating whether downlink data on K2 carriers are correctly received, and the HARQ-ACK groups comprise a positive integer number of HARQ-ACK. The second signaling is transmitted on a physical layer control channel. The K1 and the K2 are each positive integers. The index of the first carrier is an integer. The L candidate carriers include at least one carrier deployed on an unlicensed spectrum. The first carrier is one of the L candidate carriers.

In conventional CA (Carrier Aggregation) and LAA, carriers occupied by PUCCH are semi-statically configured, and PUCCH can only be transmitted on a licensed spectrum. And the essence of the above method is that the UE dynamically determines the carrier used for sending the second signaling. The method can ensure that the transmission timing of the HARQ-ACK is not changed due to LBT to the maximum extent.

As an embodiment, the information transmitted on the physical layer control channel is generated by the physical layer.

As an embodiment, the first signaling includes an index of the first carrier, and the physical layer signaling is DCI (Downlink Control Information).

As an embodiment, the first signaling is transmitted on a first carrier, and the physical layer signaling is a signature sequence transmitted on a physical layer channel.

As one embodiment, the physical layer control channel is a PUCCH.

As an embodiment, the K1 CSIs are for K1 carriers, respectively.

As an embodiment, the first carrier is one of the K2 carriers.

As an embodiment, the index of the first carrier is an index of the first carrier among the L candidate carriers.

As an embodiment, the index of the first carrier is a serving cell identity of the first carrier.

As an embodiment, the K2 carriers include at least one carrier deployed in a licensed spectrum.

As an embodiment, the first higher layer signaling is RRC (Radio Resource Control) Dedicated (Dedicated) signaling.

As an embodiment, the first higher layer signaling is RRC common signaling.

As an embodiment, the L candidate carriers include at least one carrier deployed on a licensed spectrum.

An advantage of the above embodiment is that when all carriers on the unlicensed spectrum are not suitable for carrying the second signaling due to interference, the second signaling can be transmitted on the licensed spectrum-without being discarded.

As one embodiment, L is a positive integer greater than 1.

As one embodiment, L is a positive integer.

As one embodiment, the CSI includes at least one of { CRI (CSI-RS Resource Indicator, CSI-RS Resource indication), PTI (Precoding Type Indicator ), RI (Rank Indicator, Rank Indicator), PMI (Precoding Matrix Indicator ), CQI (Channel Quality Indicator) }. The CRI is used to indicate one CSI-RS resource from a plurality of CSI-RS resources.

As an embodiment, the first signaling indicates that the second signaling is transmitted on a first carrier.

As an embodiment, the first signaling indicates that a physical layer control channel is included in a first time window on a first carrier, and the second signaling is transmitted in the first time window. As a sub-embodiment of the above embodiment, the first time window is implicitly indicated by the transmission time of the second signaling.

As an embodiment, the first signaling is cell-common.

As an embodiment, the first signaling is transmitted on a first carrier, the first signaling comprising at least one of a { Zadoff-Chu sequence, a pseudo-random sequence }.

Specifically, according to one aspect of the present invention, the first signaling includes an index of the first carrier, and the index of the first carrier is an index of the first carrier in the L candidate carriers.

In the above aspect, the first signaling explicitly indicates the first carrier. The base station configures L candidate carriers to reduce redundancy (Overhead) of the second signaling.

As an embodiment of the above aspect, the first signaling is sent on a second carrier, the second carrier being configured by higher layer signaling.

As an embodiment of the above aspect, the first signaling is sent on a second carrier, the second carrier being deployed in a licensed spectrum.

Specifically, according to an aspect of the present invention, the step B further includes the steps of:

-step b1. detecting first signalling on the L candidate carriers.

Wherein the first signaling is transmitted on a first carrier.

In the above aspect, the first signaling (via the bearer carrier) implicitly indicates the first carrier, and the base station configures the L candidate carriers to reduce the complexity of blind detection performed by the UE for the first signaling.

As an embodiment, the first signaling includes at least one of a { Zadoff-Chu sequence, a pseudo-random sequence }.

As an embodiment, in step B1, the UE detects the first signaling in each of the L candidate carriers by coherent detection.

As an embodiment, the UE assumes that the first signaling can only be sent on one carrier out of the L candidate carriers.

step b2. assume that the second signaling can be sent directly without listening.

Wherein the first carrier is deployed in an unlicensed spectrum.

The essence of the above aspect is that the UE does not perform LBT operation before sending the second signaling. The above aspect can ensure that the transmission timing of the second signaling is fixed (not changed by LBT). Since PUCCH only occupies a partial bandwidth of the system band, not performing LBT does not result in full-band transmitter interference. Further, interference between multiple transmitters can be further addressed by the following method.

In particular, according to the above aspect of the invention, it is characterized in that the first signaling is transmitted on a first carrier and the time interval between the first time instant and the second time instant is smaller than a certain threshold. The first time is the ending time of a downlink Burst (Burst) corresponding to the first signaling, and the second time is the starting time of an uplink Burst corresponding to the second signaling.

The essence of the above aspect is that the uplink transmission can not perform LBT when the time interval between the uplink transmission and the downlink transmission is less than a certain threshold.

As an embodiment, the first time is an ending time of a time domain resource occupied by the first signaling.

As an embodiment, the second time is a starting time of a time domain resource occupied by the second signaling.

As an embodiment, the specific threshold is a duration of 1 OFDM (Orthogonal Frequency Division Multiplexing) symbol including CP (Cyclic Prefix).

As an example, the certain threshold does not exceed 2192 × T microseconds, T being 1/30720 milliseconds.

Specifically, according to an aspect of the present invention, the step a further includes the steps of:

-step a1. receiving second higher layer signaling, the second higher layer signaling indicating L1 in-band resource indexes, the L1 in-band resource indexes respectively corresponding to L1 carrier bandwidths.

Wherein the resource occupied by the physical layer control channel on the first carrier is indicated by a given in-band resource index, the given in-band resource index is one of the L1 in-band resource indexes, and the carrier bandwidth corresponding to the given in-band resource index is equal to the carrier bandwidth of the first carrier. L1 is an integer. If the L1 is greater than 1, the size of any two carrier bandwidths in the L1 carrier bandwidths is different.

The essence of the above aspects is: the resources occupied by the physical layer control channel in the candidate carriers with the same carrier bandwidth are the same. The above aspects can reduce overhead of higher layer signaling compared to conventional carrier-specific PUCCH configuration parameters.

As an embodiment, the L1 is 1, and the carrier bandwidths of the L2 candidate carriers are equal.

As an embodiment, the L1 is greater than 1, and the carrier bandwidth of any one of the L2 candidate carriers is one of the L1 carrier bandwidths.

As an embodiment, the in-band resource index is a PUCCH resource index.

As an embodiment, the in-band Resource index includes a PRB (Physical Resource Block) index and a PUCCH Resource index.

For one embodiment, the second higher layer signaling includes L1 sub signaling, and the L1 sub signaling is respectively used for indicating the L1 in-band resource index. As a sub-embodiment of this embodiment, the sub-signaling includes all or part of fields in PUCCH-Config IEs (Information Elements), and the PUCCH-Config IEs includes PUCCH-ConfigCommon IE and PUCCH-ConfigDedicated IE.

As an embodiment, the in-band resource index is composed of one or more PUCCH resources. As a sub-embodiment of this embodiment, the PUCCH resource corresponds to one of PUCCH formats {1, 1a, 1b, 2, 2a, 2b, 3, 4, 5 }.

The invention discloses a method for supporting communication in a base station on an unlicensed spectrum, which comprises the following steps:

-step a. sending a first higher layer signaling indicating L candidate carriers

-step c. receiving second signalling on the first carrier, the carrier used for transmitting the second signalling being indicated by the first signalling.

Specifically, according to one aspect of the present invention, the first signaling includes an index of the first carrier and the index of the first carrier is an index of the first carrier among the L candidate carriers.

step b2. the base station assumes that the UE sends the second signaling directly without listening.

Wherein the first carrier is deployed in an unlicensed spectrum.

In particular, according to the above aspect of the invention, it is characterized in that the first signaling is transmitted on a first carrier and the time interval between the first time instant and the second time instant is smaller than a certain threshold. The first time is the ending time of the downlink burst corresponding to the first signaling, and the second time is the starting time of the uplink burst corresponding to the second signaling.

a step A1, sending second higher layer signaling, where the second higher layer signaling indicates L1 in-band resource indexes, and the L1 in-band resource indexes respectively correspond to L1 carrier bandwidths.

The invention discloses a user equipment, which is characterized by comprising:

a first module: for receiving first higher layer signaling indicating L candidate carriers

A second module: for receiving the first signaling. The first signaling includes an index of the first carrier or the first signaling is transmitted on the first carrier.

A third module: the carrier used for transmitting the second signaling is indicated by the first signaling.

As an embodiment, the above user equipment is characterized in that the first signaling includes an index of the first carrier, and the index of the first carrier is an index of the first carrier in the L candidate carriers.

As an embodiment, the above user equipment is characterized in that the first module is further configured to detect the first signaling on the L candidate carriers. Wherein the first signaling is transmitted on a first carrier. As a sub-embodiment of this embodiment, the first signaling includes a Zadoff-Chu sequence. As a further sub-embodiment of this embodiment, the first signaling comprises a pseudo-random sequence.

As an embodiment, the above user equipment is characterized in that the first signaling includes an index of the first carrier and the index of the first carrier is an index of the first carrier in the L candidate carriers.

As an embodiment, the above user equipment is characterized in that the second module is further configured to detect the first signaling on the L candidate carriers. Wherein the first signaling is transmitted on a first carrier.

As an embodiment, the above user equipment is characterized in that the second module is further configured to assume that the second signaling can be sent directly without listening. Wherein the first carrier is deployed in an unlicensed spectrum.

As an embodiment, the user equipment is characterized in that the first module is further configured to receive second higher layer signaling, where the second higher layer signaling indicates L1 in-band resource indexes, and the L1 in-band resource indexes respectively correspond to L1 carrier bandwidths. Wherein the resource occupied by the physical layer control channel on the first carrier is indicated by a given in-band resource index, the given in-band resource index is one of the L1 in-band resource indexes, and the carrier bandwidth corresponding to the given in-band resource index is equal to the carrier bandwidth of the first carrier. L1 is an integer. If the L1 is greater than 1, the size of any two carrier bandwidths in the L1 carrier bandwidths is different.

As an embodiment, the above user equipment is characterized in that the first signaling is transmitted on a first carrier and a time interval between the first time instant and the second time instant is smaller than a certain threshold. The first time is the ending time of the downlink burst corresponding to the first signaling, and the second time is the starting time of the uplink burst corresponding to the second signaling.

The invention discloses a base station device, which is characterized by comprising:

a first module: for transmitting first higher layer signaling indicating L candidate carriers

A second module: for transmitting the first signaling. The first signaling includes an index of the first carrier or the first signaling is transmitted on the first carrier.

A third module: the carrier used for receiving the second signaling on the first carrier, the carrier used for transmitting the second signaling is indicated by the first signaling.

Compared with the traditional method, the method has the following technical advantages:

ensuring that the timing of the uplink control signaling on the LAA carrier is not changed by LBT, maximizing compatibility with existing systems

Saving the redundancy overhead of the high layer signaling, where the high layer signaling is used to configure the time-frequency resource occupied by the uplink control signaling.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 shows a flow diagram for signaling on an LAA carrier according to one embodiment of the invention;

FIG. 2 illustrates a diagram of a physical layer control channel dynamically switching over multiple carriers according to one embodiment of the invention;

FIG. 3 illustrates a schematic diagram of a first time and a second time according to an embodiment of the invention;

fig. 4 shows a carrier bandwidth specific in-band resource index diagram according to an embodiment of the invention;

fig. 5 shows a block diagram of a processing device in a UE according to an embodiment of the invention;

fig. 6 shows a block diagram of a processing means in a base station according to an embodiment of the invention;

Detailed Description

The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a flow chart of signaling on an LAA carrier, as shown in fig. 1. In fig. 1, the serving cell for UE U2 is maintained by base station N1, and the steps identified in block F1 are optional.

For base station N1, first higher layer signaling is sent in step S11, first signaling is sent in step S13, and second signaling is received on the first carrier in step S14.

For UE U2, first higher layer signaling is received in step S21, first signaling is received in step S13, and second signaling is sent on the first carrier in step S14.

In embodiment 1, the first higher layer signaling indicates L candidate carriers. The first signaling includes an index of the first carrier or the first signaling is transmitted on the first carrier. The first signaling is physical layer signaling, the second signaling comprises at least one of { scheduling request, K1 CSI groups, K2 HARQ-ACK groups }, the K1 CSI groups are respectively directed to K1 carriers, the CSI groups comprise positive integer numbers of CSI, the K2 HARQ-ACK groups are respectively used for indicating whether downlink data on K2 carriers are correctly received, and the HARQ-ACK groups comprise positive integer numbers of HARQ-ACK. The second signaling is transmitted on a physical layer control channel. The K1 and the K2 are each positive integers. The index of the first carrier is an integer. The L candidate carriers include at least one carrier deployed on an unlicensed spectrum. The first carrier is one of the L candidate carriers. The carrier used for transmitting the second signaling is indicated by the first signaling.

As sub-embodiment 1 of embodiment 1, the base station N1 transmits the second higher layer signaling in step S12, and the UE U2 receives the second higher layer signaling in step S22. Wherein, the second higher layer signaling indicates L1 in-band resource indexes, the L1 in-band resource indexes respectively correspond to L1 carrier bandwidths, the resource occupied by the physical layer control channel on the first carrier is indicated by a given in-band resource index, the given in-band resource index is one of the L1 in-band resource indexes, and the carrier bandwidth corresponding to the given in-band resource index is equal to the carrier bandwidth of the first carrier. L1 is an integer. If the L1 is greater than 1, the size of any two carrier bandwidths in the L1 carrier bandwidths is different.

As sub-embodiment 2 of embodiment 1, the L candidate carriers are a subset of the K2 carriers.

As sub-embodiment 3 of embodiment 1, 1 HARQ-ACK is used to indicate whether one transport block is correctly decoded.

As sub-embodiment 4 of embodiment 1, the K1 carriers are a subset of the K2 carriers.

As sub-embodiment 5 of embodiment 1, the in-band resource index is a PUCCH resource index.

As sub-embodiment 6 of embodiment 1, at least two CSI sets are included in the K1 CSI sets, and the numbers of CSI included in the two CSI sets are different.

As sub embodiment 7 of embodiment 1, at least two HARQ-ACK groups are included in the K2 HARQ-ACK groups, and the numbers of HARQ-ACKs included in the two HARQ-ACK groups are different.

Example 2

Embodiment 2 illustrates a schematic diagram of dynamic switching of a physical layer control channel on multiple carriers, as shown in fig. 2. In fig. 2, the bold boxes identify the time-frequency resources occupied by the physical layer control channels.

The L candidate carriers in the present invention are shown as carriers { #1, #2, …, # L } in fig. 2.

As shown in fig. 2, the physical layer control channel in the present invention is dynamically configured on carriers { #1, #2, …, # L } by the base station.

As sub-embodiment 1 of embodiment 2, the physical layer control channel is PUCCH.

As a sub-embodiment 2 of the embodiment 2, if the physical layer control channel occupies a time-frequency resource on an unlicensed spectrum, the UE may send an uplink signal on the physical layer control channel without LBT operation.

Example 3

Embodiment 3 illustrates a schematic diagram of the first time and the second time, as shown in fig. 3. In fig. 3, a bold line box identifies the time frequency resources occupied by the uplink burst, and an oblique line box identifies the time frequency resources occupied by the downlink burst.

In embodiment 3, the first signaling is transmitted on the first carrier and the time interval between the first time and the second time is smaller than a certain threshold, and the UE does not need to perform LBT to send the second signaling. The first time is the ending time of the downlink burst corresponding to the first signaling, and the second time is the starting time of the uplink burst corresponding to the second signaling.

As sub-embodiment 1 of embodiment 3, the first signaling is a signature sequence comprising at least one of { Zadoff-Chu sequence, pseudo-random sequence }. As an embodiment, the generation parameter of the signature sequence includes a cell identity. As an embodiment, the Cell identity is a PCI (Physical Cell identity).

As a sub-embodiment 2 of embodiment 3, the deadline of the time domain resource occupied by the first signaling is a first time.

As a sub-embodiment 3 of the embodiment 3, a start time of the time domain resource occupied by the second signaling is a second time.

Example 4

Embodiment 4 illustrates a carrier bandwidth specific inband resource index diagram, as shown in fig. 4. In fig. 4, the slash identifies a PUCCH Region (Region) identified by the first in-band resource index, and the slash identifies a PUCCH Region identified by the second in-band resource index.

In embodiment 4, the L1 in-band resource indexes in the present invention at least include a first in-band resource index and a second in-band resource index. The first in-band resource index corresponds to a carrier bandwidth I, the second in-band resource index corresponds to a carrier bandwidth II, and the carrier bandwidth I is larger than the carrier bandwidth II. The L candidate carriers in the invention at least comprise two carriers, and the bandwidths of the two carriers are respectively a carrier bandwidth I and a carrier bandwidth II.

An advantage of embodiment 4 is that the PUCCH can be dynamically configured to multiple carriers with different bandwidths.

As sub-embodiment 1 of embodiment 4, a carrier with a bandwidth of carrier bandwidth II is deployed in the licensed spectrum.

Example 5

Embodiment 5 illustrates a block diagram of a processing device in a UE, as shown in fig. 5. In fig. 5, the UE processing apparatus 200 is composed of a first module 201, a second module 202 and a third module 203.

A first module 201 is configured to receive a first high-level signaling, where the first high-level signaling indicates L candidate carriers; the second module 202 is configured to receive the first signaling. The first signaling comprises an index of the first carrier, or the first signaling is transmitted on the first carrier; the third module 203 is configured to send the second signaling on the first carrier, and the carrier used for transmitting the second signaling is indicated by the first signaling.

In embodiment 5, the first signaling is physical layer signaling, the second signaling includes at least one of { scheduling request, K1 CSI groups, and K2 HARQ-ACK groups }, the K1 CSI groups respectively correspond to K1 carriers, the CSI groups include a positive integer number of CSIs, the K2 HARQ-ACK groups respectively are used to indicate whether downlink data on K2 carriers is correctly received, and the HARQ-ACK group includes a positive integer number of HARQ-ACKs. The second signaling is transmitted on a physical layer control channel. The K1 and the K2 are each positive integers. The index of the first carrier is an integer. The L candidate carriers include at least one carrier deployed on an unlicensed spectrum. The first carrier is one of the L candidate carriers. L is a positive integer greater than 1. The first higher layer signaling is RRC signaling.

As sub embodiment 1 of embodiment 5, the second module 202 is further configured to assume that the second signaling can be sent directly without listening. Wherein the first carrier is deployed in an unlicensed spectrum.

As sub-embodiment 2 of embodiment 5, the first module 201 is further configured to receive a second higher layer signaling, where the second higher layer signaling indicates L1 in-band resource indexes, and the L1 in-band resource indexes respectively correspond to L1 carrier bandwidths. Wherein the resource occupied by the physical layer control channel on the first carrier is indicated by a given in-band resource index, the given in-band resource index is one of the L1 in-band resource indexes, and the carrier bandwidth corresponding to the given in-band resource index is equal to the carrier bandwidth of the first carrier. The L1 is 1, and the carrier bandwidths of the L candidate carriers are equal. The second higher layer signaling is RRC signaling.

As sub-embodiment 3 of embodiment 5, the index of the first carrier is an index of the first carrier among the L candidate carriers.

As sub-embodiment 4 of embodiment 5, the index of the first carrier is a serving cell identity of the first carrier, and the index of the first carrier is a non-negative integer no greater than 31.

Example 6

Embodiment 6 is a block diagram illustrating a processing apparatus in a base station, as shown in fig. 6. In fig. 6, the base station processing apparatus 300 is composed of a first module 301, a second module 302 and a third module 303.

The first module 301 is configured to send a first high-level signaling, where the first high-level signaling indicates L candidate carriers; the second module 302 is configured to send a first signaling. The first signaling comprises an index of the first carrier, or the first signaling is transmitted on the first carrier; the third module 303 is configured to receive the second signaling on the first carrier, and the carrier used for transmitting the second signaling is indicated by the first signaling.

In embodiment 6, the first signaling is physical layer signaling, the second signaling includes at least one of { scheduling request, K1 CSI groups, and K2 HARQ-ACK groups }, the K1 CSI groups respectively correspond to K1 carriers, the CSI groups include a positive integer number of CSIs, the K2 HARQ-ACK groups respectively are used to indicate whether downlink data on K2 carriers is correctly received, and the HARQ-ACK group includes a positive integer number of HARQ-ACKs. The second signaling is transmitted on a physical layer control channel. The K1 and the K2 are each positive integers. The index of the first carrier is an integer. The L candidate carriers include at least one carrier deployed on an unlicensed spectrum. The first carrier is one of the L candidate carriers. L is a positive integer greater than 1.

As sub-embodiment 1 of embodiment 6, the second module 302 is further configured to assume that the UE directly sends the second signaling without listening. Wherein the first carrier is deployed in an unlicensed spectrum.

As sub-embodiment 2 of embodiment 6, the first module 301 is further configured to send a second higher layer signaling, where the second higher layer signaling indicates L1 in-band resource indexes, and the L1 in-band resource indexes respectively correspond to L1 carrier bandwidths. Wherein the resource occupied by the physical layer control channel on the first carrier is indicated by a given in-band resource index, the given in-band resource index is one of the L1 in-band resource indexes, and the carrier bandwidth corresponding to the given in-band resource index is equal to the carrier bandwidth of the first carrier. L1 is an integer. If the L1 is greater than 1, the size of any two carrier bandwidths in the L1 carrier bandwidths is different.

As sub-embodiment 3 of embodiment 6, the first higher layer signaling is RRC dedicated signaling.

As sub-embodiment 4 of embodiment 6, the second higher layer signaling is RRC common signaling.

As sub-embodiment 5 of embodiment 6, the first signaling includes an index of the first carrier and the index of the first carrier is an index of the first carrier among the L candidate carriers. The first signaling is sent on a second carrier, which is configured by higher layer signaling.

As sub-embodiment 6 of embodiment 6, the first signaling includes an index of the first carrier and the index of the first carrier is an index of the first carrier among the L candidate carriers. The first signaling is sent on a second carrier, which is deployed in the licensed spectrum.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE in the present invention includes but is not limited to a mobile phone, a tablet computer, a notebook, a network card, and other wireless communication devices. The base station or system device in the present invention includes but is not limited to a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method in a UE supporting communication over an unlicensed spectrum, comprising the steps of:

-step a. receiving first higher layer signalling, the first higher layer signalling indicating L candidate carriers;

-step b. receiving a first signalling; the first signaling comprises an index of the first carrier, or the first signaling is transmitted on the first carrier;

-step c. sending second signalling on the first carrier, the carrier used for transmission of the second signalling being indicated by the first signalling;

the first signaling is DCI, the second signaling comprises at least one of { scheduling request, K1 CSI groups and K2 HARQ-ACK groups }, the K1 CSI groups are respectively directed to K1 carriers, the CSI groups comprise a positive integer number of CSI, the K2 HARQ-ACK groups are respectively used for indicating whether downlink data on K2 carriers are correctly received, and the HARQ-ACK groups comprise a positive integer number of HARQ-ACK; the second signaling is transmitted on a physical layer control channel; the K1 and the K2 are each positive integers; the index of the first carrier is an integer; the L candidate carriers comprise at least one carrier deployed on an unlicensed spectrum; the first carrier is one of the L candidate carriers.

2. The method in a UE supporting communication over an unlicensed spectrum according to claim 1 wherein said first signaling includes an index of a first carrier and said index of the first carrier is an index of the first carrier among the L candidate carriers.

3. The method in a UE supporting communication over an unlicensed spectrum as claimed in claim 1, wherein said step B further includes the steps of:

-step b1. detecting a first signalling on the L candidate carriers;

wherein the first signaling is transmitted on a first carrier.

4. The method in a UE supporting communication over an unlicensed spectrum as claimed in claim 1, wherein said step B further includes the steps of:

step b2. assume that the second signaling can be sent directly without interception;

wherein the first carrier is deployed in an unlicensed spectrum.

5. The method in a UE supporting communication over an unlicensed spectrum as claimed in claim 1, wherein said step a further comprises the steps of:

a step A1, receiving second higher layer signaling, wherein the second higher layer signaling indicates L1 in-band resource indexes, and the L1 in-band resource indexes respectively correspond to L1 carrier bandwidths;

wherein, the resource occupied by the physical layer control channel on the first carrier is indicated by a given in-band resource index, the given in-band resource index is one of the L1 in-band resource indexes, and the carrier bandwidth corresponding to the given in-band resource index is equal to the carrier bandwidth of the first carrier; l1 is an integer; if the L1 is greater than 1, the size of any two carrier bandwidths in the L1 carrier bandwidths is different.

6. The method in a UE supporting communication over an unlicensed spectrum according to claim 1 or 4 wherein said first signaling is transmitted on said first carrier and the time interval between a first time instant and a second time instant is less than a certain threshold; the first time is a stop time of a downlink burst corresponding to the first signaling, and the second time is a start time of an uplink burst corresponding to the second signaling.

7. A method in a base station supporting communication over an unlicensed spectrum, comprising the steps of:

-step a. sending a first higher layer signaling, the first higher layer signaling indicating L candidate carriers;

-step b. sending a first signalling; the first signaling comprises an index of the first carrier, or the first signaling is transmitted on the first carrier;

-step c. receiving second signalling on the first carrier, the carrier used for transmitting the second signalling being indicated by the first signalling;

8. The method in a base station supporting communication over an unlicensed spectrum according to claim 7 wherein said first signaling includes an index of said first carrier and said index of said first carrier is an index of said first carrier among said L candidate carriers.

9. The method in a base station supporting communication over an unlicensed spectrum as claimed in claim 7, wherein said step B further includes the steps of:

-step b2. the base station assumes that the UE directly sends the second signaling without listening;

wherein the first carrier is deployed in an unlicensed spectrum.

10. The method in a base station supporting communication over an unlicensed spectrum as claimed in claim 7, wherein said step a further includes the steps of:

a step A1, sending a second higher layer signaling, wherein the second higher layer signaling indicates L1 in-band resource indexes, and the L1 in-band resource indexes respectively correspond to L1 carrier bandwidths;

11. The method in a base station supporting communication over an unlicensed spectrum according to claim 7 or 9 wherein said first signaling is transmitted on said first carrier and the time interval between a first time instant and a second time instant is less than a certain threshold; the first time is the ending time of the downlink burst corresponding to the first signaling, and the second time is the starting time of the uplink burst corresponding to the second signaling.

12. A user equipment, characterized in that the equipment comprises:

a first module: the first high-level signaling is used for receiving the first high-level signaling, and the first high-level signaling indicates L candidate carriers;

a second module: for receiving a first signaling; the first signaling comprises an index of the first carrier, or the first signaling is transmitted on the first carrier;

a third module: the carrier wave used for transmitting the second signaling is indicated by the first signaling;

13. The UE of claim 12, wherein the first signaling comprises an index of a first carrier and the index of the first carrier is an index of the first carrier among the L candidate carriers.

14. The UE of claim 12, wherein the second module detects the first signaling on the L candidate carriers;

wherein the first signaling is transmitted on a first carrier.

15. The UE of claim 12, wherein the second module assumes that the second signaling can be sent directly without listening; wherein the first carrier is deployed in an unlicensed spectrum.

16. The UE of claim 12, wherein the first module receives second higher layer signaling indicating L1 in-band resource indices (NBs), and wherein the L1 NBs respectively correspond to L1 carrier bandwidths; wherein, the resource occupied by the physical layer control channel on the first carrier is indicated by a given in-band resource index, the given in-band resource index is one of the L1 in-band resource indexes, and the carrier bandwidth corresponding to the given in-band resource index is equal to the carrier bandwidth of the first carrier; l1 is an integer; if the L1 is greater than 1, the size of any two carrier bandwidths in the L1 carrier bandwidths is different.

17. The user equipment according to claim 12 or 15, wherein the first signaling is transmitted on a first carrier and a time interval between the first time instant and the second time instant is smaller than a certain threshold; the first time is the ending time of the downlink burst corresponding to the first signaling, and the second time is the starting time of the uplink burst corresponding to the second signaling.

18. A base station apparatus, characterized in that the apparatus comprises:

a first module: the first high-level signaling is used for sending first high-level signaling, and the first high-level signaling indicates L candidate carriers;

a second module: for transmitting a first signaling; the first signaling comprises an index of the first carrier, or the first signaling is transmitted on the first carrier;

a third module: receiving second signaling on the first carrier, wherein the carrier for transmitting the second signaling is indicated by the first signaling;

19. The base station device of claim 18, wherein the first signaling comprises an index of a first carrier and the index of the first carrier is an index of the first carrier among the L candidate carriers.

20. The base station device of claim 18, wherein the second module the base station assumes that the UE directly sends the second signaling without listening; wherein the first carrier is deployed in an unlicensed spectrum.

21. The base station device of claim 18, wherein the first module sends a second higher layer signaling indicating L1 in-band resource indices, and wherein the L1 in-band resource indices correspond to L1 carrier bandwidths, respectively; wherein, the resource occupied by the physical layer control channel on the first carrier is indicated by a given in-band resource index, the given in-band resource index is one of the L1 in-band resource indexes, and the carrier bandwidth corresponding to the given in-band resource index is equal to the carrier bandwidth of the first carrier; l1 is an integer; if the L1 is greater than 1, the size of any two carrier bandwidths in the L1 carrier bandwidths is different.

22. A base station device according to claim 18 or 20, wherein the first signalling is transmitted on a first carrier and the time interval between a first time instant and a second time instant is less than a certain threshold; the first time is a stop time of a downlink burst corresponding to the first signaling, and the second time is a start time of an uplink burst corresponding to the second signaling.