CN110049564B - LAA transmission method and device in cellular network - Google Patents
LAA transmission method and device in cellular network Download PDFInfo
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- CN110049564B CN110049564B CN201910239005.2A CN201910239005A CN110049564B CN 110049564 B CN110049564 B CN 110049564B CN 201910239005 A CN201910239005 A CN 201910239005A CN 110049564 B CN110049564 B CN 110049564B
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Abstract
The invention provides an LAA transmission method and device in a cellular network. The UE receives a first signaling and a second signaling respectively in a first subframe and a second subframe; the first signaling indicates a first COT on a first carrier, the second signaling triggers wireless transmission on a target subframe of the first carrier, and the wireless transmission is uplink transmission; and the UE judges whether the wireless transmission is implemented or not in an auxiliary manner according to whether the target subframe belongs to the first COT or not. Wherein the first carrier is deployed in an unlicensed spectrum. The first signaling is signaling that was last received by the UE before the target subframe to indicate a COT of a serving cell of the UE on a first carrier. The first COT occupies K consecutive subframes, K being a positive integer. The LTE LAA introduced with the LBT technology can be compatible with a traditional synchronous UL HARQ scheme and a traditional RS semi-static configuration scheme.
Description
The present application is a divisional application of the following original applications:
application date of the original application: 10 and 23 days 2014
- -application number of the original application: 201410572505.5
The invention of the original application is named: LAA transmission method and device in cellular network
Technical Field
The present invention relates to a scheme for communication using an Unlicensed Spectrum in a wireless communication system, and in particular, to a communication method and apparatus for an Unlicensed Spectrum (Unlicensed Spectrum) based on LTE (Long Term Evolution).
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. An intuitive method is to reuse the concept of Carrier Aggregation (CA) in the existing system as much as possible, that is, a serving cell deployed on a licensed spectrum is used as a PCC (Primary Component Carrier) and a serving cell deployed on an unlicensed spectrum is used as an SCC (Secondary Component Carrier). For the unlicensed spectrum, considering the uncontrollable/predictable interference level, the LBT (Listen Before transmit) technique can effectively avoid interference between the LTE system and other systems and interference between different operator devices inside the LTE system. In RAN #64 congress, the communication over unlicensed spectrum is collectively named LAA (licensed Assisted Access).
For LTE LAA, one consideration is that when the base station schedules wireless transmission of the target-subframe in the current subframe, it may not be possible to ensure that wireless transmission on the target-subframe actually occurs (due to introduction of LBT techniques). For example, LTE uplink transmission employs synchronous HARQ (Hybrid Automatic Repeat Request), that is: the time frequency position of the physical resource occupied by the uplink retransmission and the time frequency position of the physical resource occupied by the initial transmission in the subframe are the same, and the subframe occupied by the uplink retransmission is predefined. For LBT, however, a UE (User Equipment) listens to the unlicensed spectrum for interference levels to determine whether to perform uplink transmissions. The base station may not determine whether the UE performs uplink transmission in the scheduling subframe and may not determine the redundancy version of the physical layer data transmitted by the UE in the scheduling subframe, i.e. the LBT and the uplink synchronous HARQ may collide. For example, if the base station configures downlink RS (Reference Signal) transmission in the LAA carrier by a semi-static method, it cannot be ensured that all the configured subframes are usable subframes.
In order to solve the problems, the invention discloses an LAA transmission method and device in a cellular network.
Disclosure of Invention
The invention discloses a method in UE, which comprises the following steps:
-step a. receiving first and second signalling in first and second subframes, respectively. The first signaling indicates a first COT (Channel occupancy Time) on the first carrier, and the second signaling triggers wireless transmission on a target subframe of the first carrier, where the wireless transmission is uplink transmission or downlink transmission
-step b. depending on whether the target subframe belongs to a first COT-assisted determination of whether the radio transmission is carried out. The wireless transmission is uplink transmission, if the wireless transmission is judged to be implemented, physical layer data is sent on the target subframe of the first carrier, and if the wireless transmission is judged not to be implemented, the physical layer data is abandoned to be sent on the target subframe of the first carrier; or the wireless transmission is downlink transmission, if the wireless transmission is judged to be implemented, the downlink RS is received on the target subframe of the first carrier, and if the wireless transmission is judged not to be implemented, the downlink RS is abandoned to be received on the target subframe of the first carrier.
Wherein the first carrier is deployed in an unlicensed spectrum. The first signaling is signaling that was last received by the UE before the target subframe to indicate a COT of a serving cell of the UE on a first carrier. The first COT occupies K consecutive subframes, K being a positive integer.
As an embodiment, the wireless transmission is uplink transmission, the second signaling is DCI (Downlink Control Information) for scheduling uplink transmission, and a time-frequency resource occupied by the physical layer data is indicated by the second signaling. As a sub-embodiment of the above embodiment, the second signaling is DCI format 0 or DCI format 4. In an embodiment, the wireless transmission is uplink transmission, the second signaling is NACK, and the time-frequency resource occupied by the physical layer data is determined by the HARQ process indicated by the second signaling. As an embodiment, the Radio transmission is downlink transmission, the second signaling is Radio Resource Control (RRC) signaling for configuring a periodic RS, and the target subframe is a transmission subframe of the periodic RS. As an embodiment, the radio transmission is downlink transmission, and the time-frequency resource occupied by the downlink RS is indicated by the second signaling. As an embodiment, the first signaling is physical layer signaling.
As an embodiment, the wireless transmission is uplink transmission, the target subframe is a k1 th subframe after the second subframe, and the k1 is the number of subframes corresponding to one uplink scheduling delay in TDD (Time Division Duplex), that is, one of {4, 5, 6, 7 }. As an embodiment, the second signaling and the first signaling are transmitted on a second carrier, the second carrier is deployed in a licensed spectrum, and subframe timings of the first carrier and the second carrier are not synchronized.
As an embodiment, the K is configured by higher layer signaling.
As one embodiment, the starting subframe of the first COT is a first subframe.
Specifically, according to one aspect of the present invention, the step B includes the steps of:
-step b1. determining that the wireless transmission is implemented. Wherein the target-subframe belongs to a first COT.
Specifically, according to an aspect of the present invention, the step B includes the steps of:
-step b2. the wireless transmission is an uplink transmission, performing an LBT operation on a subframe preceding the target subframe on a first carrier to determine whether the wireless transmission is carried out; or the wireless transmission is downlink transmission, and the wireless transmission is judged not to be implemented.
Wherein the target-subframe is a subframe other than the first COT.
Specifically, according to an aspect of the present invention, the wireless transmission is downlink transmission, and the method further includes the following steps:
and step C, sending uplink CSI (Channel State Indicator) on a second carrier, wherein a reference RS of the uplink CSI comprises the downlink RS, and the second carrier is deployed in the licensed spectrum.
The reference RS of the uplink CSI including the downlink RS means that the UE performs channel estimation by using resources including the downlink RS to calculate the uplink CSI. As one embodiment, the CSI includes one or more of { RI (Rank Indicator), PTI (Precoding Type Indicator), PMI (Precoding Matrix Indicator), CQI (Channel Quality Indicator) }.
Specifically, according to an aspect of the present invention, the radio transmission is uplink transmission, and the Redundancy Version (RV) of the physical layer data is a Redundancy Version corresponding to the target subframe under the condition that no uplink transmission is discarded in the current HARQ process.
The essence of the above aspects is that if the UE determines that the radio transmission is not implemented, the corresponding physical layer data is discarded (Drop), and the redundancy version of the physical layer data subsequently sent by the HARQ process to which the physical layer data belongs is not affected. The above aspects can ensure that uplink transmission executed by the UE is consistent with RV of synchronous HARQ in the existing LTE system, and avoid the base station side from confusing the redundancy version of the physical layer data in the HARQ process. The above aspects maintain maximum compatibility with existing LTE synchronous HARQ.
The invention discloses a method in a base station, which comprises the following steps:
-step a. transmitting first and second signalling in first and second subframes, respectively. The first signaling indicates a first COT on a first carrier, and the second signaling triggers wireless transmission on a target subframe of the first carrier, wherein the wireless transmission is uplink transmission or downlink transmission
-step b. determining whether the radio transmission is carried out assisted by whether the target subframe belongs to a first COT. The wireless transmission is uplink transmission, if the wireless transmission is judged to be implemented, physical layer data is received on the target subframe of the first carrier, and if the wireless transmission is judged not to be implemented, the physical layer data is abandoned to be received on the target subframe of the first carrier; or the wireless transmission is downlink transmission, if the wireless transmission is judged to be implemented, downlink RS is sent on the target subframe of the first carrier, and if the wireless transmission is judged not to be implemented, the downlink RS is abandoned to be sent on the target subframe of the first carrier.
Wherein the first carrier is deployed in an unlicensed spectrum. The first signaling is signaling which is sent by the base station last time before the target subframe and is used for indicating the COT of a sending cell of the second signaling on the first carrier. The first COT occupies K consecutive subframes, K being a positive integer.
And the physical layer data is sent by the UE for receiving the second signaling. The COT is used to indicate a subframe scheduled by the base station. As an embodiment, the base station performs at least one of { downlink transmission, uplink reception } in a subframe of the COT on the (indicated) first carrier, and turns off the transceiver for the first carrier in a subframe other than the COT on the (indicated) first carrier.
As an embodiment, the operation method for giving up receiving physical layer data comprises: the base station turns off a wireless receiver for the first carrier in the target subframe. As an embodiment, the operation method for discarding receiving physical layer data includes: the base station discards (Drop) the wireless signal received on the target-subframe of the first carrier.
Specifically, according to an aspect of the present invention, the step B includes the steps of:
-step b1. determining that the wireless transmission is implemented. Wherein the target-subframe belongs to a first COT.
Specifically, according to one aspect of the present invention, the step B includes the steps of:
-step b2. the wireless transmission is an uplink transmission, and whether the wireless transmission is implemented is determined by itself; or the wireless transmission is downlink transmission, and the wireless transmission is judged not to be implemented.
Wherein the target-subframe is a subframe other than the first COT.
As an embodiment, the method for self-judging is as follows: and if the power of the received signal exceeds a given power threshold, judging that the wireless transmission is implemented, otherwise, judging that the wireless transmission is not implemented. As an embodiment, the method for self-judging is as follows: performing channel estimation according to a wireless Signal received on a time-frequency resource of a DMRS (Demodulation Reference Signal), and if the statistical characteristics of the recovered channel parameters meet expectations, determining that the wireless transmission is performed, otherwise, determining that the wireless transmission is not performed. As an example of the statistical properties that are expected: the maximum multipath delay is less than a given time threshold.
Specifically, according to an aspect of the present invention, the wireless transmission is downlink transmission, and the method further includes the following steps:
and step C, receiving uplink CSI on a second carrier, wherein the reference RS of the uplink CSI comprises the downlink RS, and the second carrier is deployed in the authorized spectrum.
As an embodiment, the downlink RS is a CSI-RS.
Specifically, according to an aspect of the present invention, the radio transmission is uplink transmission, and the redundancy version of the physical layer data is a redundancy version corresponding to the target subframe under the condition that no uplink transmission is discarded in the current HARQ process.
The invention discloses a user equipment, which is characterized by comprising:
a first module: for receiving the first signaling and the second signaling in the first sub-frame and the second sub-frame, respectively. The first signaling indicates a first COT on a first carrier, the second signaling triggers wireless transmission on a target subframe of the first carrier, and the wireless transmission is uplink transmission or downlink transmission
A second module: and the method is used for assisting in judging whether the wireless transmission is implemented or not according to whether the target subframe belongs to a first COT or not. The wireless transmission is uplink transmission, if the wireless transmission is judged to be carried out, physical layer data is sent on the target subframe of the first carrier, and if the wireless transmission is judged not to be carried out, the sending of the physical layer data is abandoned on the target subframe of the first carrier; or the wireless transmission is downlink transmission, if the wireless transmission is judged to be carried out, downlink RS is received on the target subframe of the first carrier, and if the wireless transmission is judged not to be carried out, the downlink RS is abandoned to be received on the target subframe of the first carrier.
Wherein the first carrier is deployed in an unlicensed spectrum. The first signaling is signaling that was last received by the UE before the target-subframe to indicate a COT of a serving cell of the UE on a first carrier. The first COT occupies K consecutive subframes, K being a positive integer.
As an embodiment, the second module is configured to determine that the wireless transmission is implemented. Wherein the target-subframe belongs to a first COT.
As an embodiment, the second module is to:
-the wireless transmission is an uplink transmission, performing an LBT operation on a first carrier on a subframe preceding the target subframe to determine whether the wireless transmission is carried out; or the wireless transmission is downlink transmission, and the wireless transmission is judged not to be implemented.
Wherein the target-subframe is a subframe other than the first COT.
As an embodiment, the apparatus further comprises:
a third module: and the uplink CSI reference RS comprises the downlink RS, and the second carrier is deployed in the authorized spectrum.
The invention discloses a base station device, which is characterized by comprising:
a first module: the method is used for respectively sending first signaling and second signaling in a first subframe and a second subframe. The first signaling indicates a first COT on a first carrier, and the second signaling triggers wireless transmission on a target subframe of the first carrier, wherein the wireless transmission is uplink transmission or downlink transmission
A second module: and the method is used for judging whether the wireless transmission is implemented in an auxiliary manner according to whether the target subframe belongs to the first COT. The wireless transmission is uplink transmission, if the wireless transmission is judged to be implemented, physical layer data is received on the target subframe of the first carrier, and if the wireless transmission is judged not to be implemented, the physical layer data is abandoned to be received on the target subframe of the first carrier; or the wireless transmission is downlink transmission, if the wireless transmission is judged to be implemented, downlink RS is sent on the target subframe of the first carrier, and if the wireless transmission is judged not to be implemented, the downlink RS is abandoned to be sent on the target subframe of the first carrier.
Wherein the first carrier is deployed in an unlicensed spectrum. The first signaling is signaling which is sent by the base station last time before the target subframe and is used for indicating the COT of a sending cell of the second signaling on the first carrier. The first COT occupies K consecutive subframes, K being a positive integer.
As an embodiment, the second module is configured to determine that the wireless transmission is implemented. Wherein the target-subframe belongs to a first COT.
As an example, the second module is for
-said wireless transmission is an uplink transmission, and it is self-determined whether said wireless transmission is performed; or the wireless transmission is downlink transmission, and the wireless transmission is judged not to be implemented.
Wherein the target-subframe is a subframe other than the first COT.
As an embodiment, the apparatus further comprises:
a third module: and the uplink CSI is received on a second carrier, a reference RS of the uplink CSI comprises the downlink RS, and the second carrier is deployed in the authorized spectrum.
The invention provides an LAA transmission method and device in a cellular network, aiming at the problem that the base station possibly cannot ensure that the wireless transmission on a target subframe really occurs when the base station schedules the wireless transmission on the target subframe of an LAA carrier wave on the current subframe. The LTE LAA introduced with the LBT technology can be compatible with a traditional synchronous UL (Uplink) HARQ scheme and a traditional RS semi-static configuration scheme, and complex standard change is avoided.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments thereof, made with reference to the following drawings:
fig. 1 shows a flow diagram for uplink transmission on an LAA carrier according to one embodiment of the invention;
fig. 2 shows a flow diagram of downlink RS transmission on an LAA carrier according to one embodiment of the invention;
FIG. 3 illustrates a timing diagram of a first subframe, a second subframe, and a target-subframe according to one embodiment of the invention;
fig. 4 is a block diagram illustrating a processing apparatus for uplink transmission in a UE according to an embodiment of the present invention;
fig. 5 is a block diagram illustrating a processing apparatus for downlink RS reception in a UE according to an embodiment of the present invention;
fig. 6 is a block diagram illustrating a structure of a processing apparatus for uplink reception in a base station according to an embodiment of the present invention;
fig. 7 is a block diagram illustrating a structure of a processing apparatus for downlink RS transmission in a base station according to an embodiment of the present 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 embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.
Example 1
Embodiment 1 illustrates a flowchart of uplink transmission on an LAA carrier, as shown in fig. 1. In fig. 1, base station N1 maintains a first cell, which is the serving cell for UE U2.
For the base station N1, in step S11, first signaling and second signaling are transmitted in the first subframe and the second subframe, respectively; in step S12, it is assisted to determine whether the wireless transmission is performed according to whether the target subframe belongs to the first COT. If the wireless transmission is determined to be performed, receiving physical layer data on the target-subframe of the first carrier in step S120; and if it is determined that the wireless transmission is not performed, discarding receiving physical layer data on the target subframe of the first carrier in step S121. Wherein the first signaling is signaling which is sent by the base station N1 last time before the target subframe and is used for indicating the COT of the first cell on the first carrier.
For the UE U2, in step S21, first signaling and second signaling are received in the first subframe and the second subframe, respectively; in step S22, it is assisted to determine whether the wireless transmission is performed according to whether the target subframe belongs to the first COT. If the wireless transmission is determined to be performed, transmitting physical layer data on the target subframe of the first carrier in step S220; if the wireless transmission is not performed, the transmission of physical layer data is abandoned on the target subframe of the first carrier in step S221. Wherein the first signaling is signaling that the UE U2 received last before the target subframe to indicate a COT of the first cell on the first carrier.
In embodiment 1, the first signaling indicates a first COT on the first carrier, and the second signaling triggers a radio transmission on a target subframe of the first carrier, where the radio transmission is an uplink transmission. The first carrier is deployed in an unlicensed spectrum. The first COT occupies K consecutive subframes, K being a positive integer.
As sub-embodiment 1 of embodiment 1, the K is configured by higher layer signaling.
As sub-embodiment 2 of embodiment 1, the first signaling is physical layer signaling and the second signaling is DCI or NACK.
As sub-embodiment 3 of embodiment 1, the target-subframe belongs to the first COT, and both the base station N1 judges the radio transmission implementation in step S12 and the UE U2 judges the radio transmission implementation in step S22.
As sub-embodiment 4 of embodiment 1, the target subframe is a subframe other than the first COT, the base station N1 determines whether the wireless transmission is performed by itself in step S12, and the UE U2 performs an LBT operation on a subframe previous to the target subframe on the first carrier in step S22 to determine whether the wireless transmission is performed.
As sub-embodiment 5 of embodiment 1, the redundancy version of the physical layer data is a redundancy version corresponding to the target subframe under the condition that the uplink transmission is not discarded in the current HARQ process.
Example 2
Embodiment 2 illustrates a flowchart of downlink RS transmission on an LAA carrier, as shown in fig. 2. In fig. 2, base station N3 maintains a second cell, which is the serving cell for UE U4.
For the base station N3, in step S31, first signaling and second signaling are transmitted in the first subframe and the second subframe, respectively; in step S32, it is assisted to determine whether the wireless transmission is performed according to whether the target subframe belongs to the first COT. If the wireless transmission is determined to be performed, transmitting a downlink RS on the target subframe of the first carrier in step S320; and if the wireless transmission is not performed, in step S321, abandoning the transmission of the downlink RS on the target subframe of the first carrier. Wherein the first signaling is signaling which is sent by the base station N3 last time before the target subframe and is used for indicating the COT of the second cell on the first carrier.
For UE U4, in step S41, first signaling and second signaling are received at the first subframe and the second subframe, respectively; in step S42, it is assisted to determine whether the wireless transmission is performed according to whether the target subframe belongs to the first COT. Receiving a downlink RS on the target subframe of the first carrier in step S420 if the radio transmission is judged to be performed, and forgoing receiving a downlink RS on the target subframe of the first carrier in step S421 if the radio transmission is judged not to be performed. Wherein the first signaling is signaling that the UE U4 received last before the target subframe to indicate a COT of the second cell on the first carrier.
In embodiment 2, the first signaling indicates a first COT on the first carrier, and the second signaling triggers radio transmission on a target subframe of the first carrier, where the radio transmission is downlink transmission. The first carrier is deployed in an unlicensed spectrum. The first COT occupies K consecutive subframes, K being a positive integer.
As sub-embodiment 1 of embodiment 2, the downlink RS is a CSI-RS.
As a sub-embodiment 2 of the embodiment 2, the second signaling is RRC signaling, and the second signaling configures transmission resources occupied by the downlink RS.
As sub-embodiment 3 of embodiment 2, the first signaling and the second signaling are transmitted on a second carrier, the second carrier being deployed in a licensed spectrum.
As sub-embodiment 4 of embodiment 2, the starting subframe of the first COT is the first subframe.
Example 3
Embodiment 3 illustrates timing charts of the first subframe, the second subframe and the target-subframe, as shown in fig. 3. In fig. 3, a bold line square identifies a first subframe, a slash square identifies a second subframe, and a slash square identifies a third subframe.
The base station firstly sends a first signaling and a second signaling to the UE respectively in a first subframe and a second subframe. Then, the base station and the UE respectively assist to judge whether the wireless transmission is implemented according to whether the target subframe belongs to the first COT. If the base station judges that the wireless transmission is implemented, the base station receives physical layer data on the target subframe of the first carrier, otherwise, the base station gives up receiving the physical layer data on the target subframe of the first carrier. If the UE judges that the wireless transmission is implemented, the UE sends physical layer data on the target subframe of the first carrier, otherwise, the UE gives up sending the physical layer data on the target subframe of the first carrier.
In embodiment 3, the first signaling indicates a first COT on the first carrier, and the second signaling triggers a radio transmission on a target subframe of the first carrier, where the radio transmission is an uplink transmission. The first carrier is deployed in an unlicensed spectrum. The first COT occupies K consecutive subframes, K being a positive integer. For the base station, the first signaling is signaling which is sent last before the target subframe and is used for indicating the COT of the serving cell of the UE on a first carrier. For the UE, the first signaling is signaling that it received last before the target-subframe to indicate its serving cell's COT on a first carrier. The first signaling and the second signaling are transmitted on a second carrier, the second carrier being deployed in a licensed spectrum. The first subframe is a subframe after the second subframe and before the target subframe.
As sub-embodiment 1 of embodiment 3, the subframe timings of the first carrier and the second carrier are not synchronized.
As sub-embodiment 2 of embodiment 3, the first signaling is physical layer signaling common to the cells.
Example 4
Embodiment 4 illustrates a block diagram of a processing apparatus for uplink transmission in a UE, as shown in fig. 4. In fig. 4, the UE processing apparatus 200 is composed of a receiving module 201 and a processing module 202.
The receiving module 201 is configured to receive a first signaling and a second signaling in a first subframe and a second subframe, respectively; the processing module 202 is configured to assist, according to whether the target subframe belongs to the first COT, to determine whether the wireless transmission is implemented, if the wireless transmission is determined to be implemented, send physical layer data on the target subframe of the first carrier, and if the wireless transmission is not determined to be implemented, abandon sending physical layer data on the target subframe of the first carrier.
In embodiment 4, the first signaling indicates a first COT on the first carrier, and the second signaling triggers a radio transmission on a target subframe of the first carrier, where the radio transmission is an uplink transmission. The first carrier is deployed in an unlicensed spectrum. The first signaling is signaling that was last received by the UE before the target subframe to indicate a COT of a serving cell of the UE on a first carrier. The first COT occupies K consecutive subframes, K being a positive integer. The target-subframe is a k1 th subframe after the second subframe, the k1 being one of {4, 5, 6, 7 }.
Example 5
Embodiment 5 illustrates a block diagram of a processing apparatus for downlink RS reception in a UE, as shown in fig. 5. In fig. 5, the UE processing apparatus 300 is composed of a receiving module 301, a processing module 302 and a transmitting module 303, wherein the transmitting module 303 is an optional module.
The receiving module 301 is configured to receive a first signaling and a second signaling in a first subframe and a second subframe, respectively; the processing module 302 is configured to assist, according to whether the target subframe belongs to a first COT, to determine whether the wireless transmission is implemented, receive a downlink RS on the target subframe of a first carrier if the wireless transmission is determined to be implemented, and abandon receiving the downlink RS on the target subframe of the first carrier if the wireless transmission is determined not to be implemented; the sending module 303 is configured to send the uplink CSI on a second carrier, where a reference RS of the uplink CSI includes the downlink RS, and the second carrier is deployed in the licensed spectrum.
In embodiment 5, the first signaling indicates a first COT on the first carrier, and the second signaling triggers radio transmission on a target subframe of the first carrier, where the radio transmission is downlink transmission. The first carrier is deployed in an unlicensed spectrum. The first signaling is signaling that was last received by the UE before the target subframe to indicate a COT of a serving cell of the UE on a first carrier. The first COT occupies K consecutive subframes, K being a positive integer.
Example 6
Embodiment 6 is a block diagram illustrating a processing apparatus for uplink reception in a base station, as shown in fig. 6. In fig. 6, the base station processing apparatus 400 is composed of a transmitting module 401 and a processing module 402.
The sending module 401 is configured to send a first signaling and a second signaling in a first subframe and a second subframe, respectively; the processing module 402 is configured to assist in determining whether the wireless transmission is implemented according to whether the target subframe belongs to a first COT. Receiving physical layer data on the target subframe of a first carrier if the wireless transmission is judged to be carried out; and if the wireless transmission is not carried out, abandoning to receive physical layer data on the target subframe of the first carrier.
In embodiment 6, the first signaling indicates a first COT on the first carrier, and the second signaling triggers a radio transmission on a target subframe of the first carrier, where the radio transmission is an uplink transmission. The first carrier is deployed in an unlicensed spectrum. The first signaling is signaling which is sent by the base station last time before the target subframe and is used for indicating the COT of a sending cell of the second signaling on the first carrier. The first COT occupies K consecutive subframes, K being a positive integer.
As sub-embodiment 1 of embodiment 6, the method of assisting the determination is: if the target subframe belongs to a first COT, judging that the wireless transmission is implemented; and if the target subframe belongs to subframes except the first COT, judging whether the wireless transmission is implemented or not by self.
Example 7
Embodiment 7 illustrates a block diagram of a processing apparatus for downlink RS transmission in a base station, as shown in fig. 7. In fig. 7, the base station processing apparatus 500 is composed of a sending module 501, a processing module 502 and a receiving module 503, wherein the receiving module 503 is an optional module.
The sending module 501 is configured to send a first signaling and a second signaling in a first subframe and a second subframe, respectively; the processing module 502 is configured to assist, according to whether the target subframe belongs to a first COT, to determine whether the wireless transmission is implemented, if the wireless transmission is determined to be implemented, send a downlink RS on the target subframe of a first carrier, and if the wireless transmission is determined not to be implemented, abandon sending the downlink RS on the target subframe of the first carrier; the receiving module 503 is configured to receive the uplink CSI on a second carrier, where a reference RS of the uplink CSI includes the downlink RS, and the second carrier is deployed in the licensed spectrum.
The first signaling indicates a first COT on a first carrier, the second signaling triggers wireless transmission on a target subframe of the first carrier, and the wireless transmission is downlink transmission. The first carrier is deployed in an unlicensed spectrum. The first signaling is signaling which is sent by the base station last time before the target subframe and is used for indicating the COT of a sending cell of the second signaling on the first carrier. The first COT occupies K consecutive subframes, where K is a positive integer.
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 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 (20)
1. A method in a UE, comprising the steps of:
-step a. receiving first and second signalling in first and second sub-frames, respectively; the first signaling indicates a first COT on a first carrier, the second signaling triggers wireless transmission on a target subframe of the first carrier, and the wireless transmission is uplink transmission;
-step b, determining whether the radio transmission is performed assisted by determining whether the target subframe belongs to a first COT; if the wireless transmission is judged to be carried out, transmitting physical layer data on the target subframe of the first carrier, and if the wireless transmission is judged not to be carried out, giving up transmitting the physical layer data on the target subframe of the first carrier;
wherein the first carrier is deployed in an unlicensed spectrum; the first signaling is signaling that is received by the UE last before the target subframe and is used for indicating the COT of a serving cell of the UE on a first carrier; the first COT occupies K continuous subframes, wherein K is a positive integer; the second signaling is DCI for scheduling uplink transmission.
2. The method of claim 1, wherein step B comprises the steps of:
-step b1. determining that the wireless transmission is implemented; wherein the target-subframe belongs to a first COT.
3. The method of claim 1, wherein step B comprises the steps of:
-step b2. performing an LBT operation on a subframe preceding the target subframe on a first carrier to determine whether the wireless transmission is carried out;
wherein the target-subframe is a subframe other than the first COT.
4. The method according to any of claims 1 to 3, wherein the redundancy version of the physical layer data is the redundancy version corresponding to the target subframe under the condition that no uplink transmission is discarded in the current HARQ process.
5. The method according to any of claims 1-3, wherein a starting subframe of the first COT is a first subframe.
6. A method in a base station, comprising the steps of:
-step a. sending first and second signalling in first and second subframes, respectively; the first signaling indicates a first COT on a first carrier, the second signaling triggers wireless transmission on a target subframe of the first carrier, and the wireless transmission is uplink transmission;
-step b, determining whether the radio transmission is implemented assisted by determining whether the target subframe belongs to a first COT; receiving physical layer data on the target subframe of the first carrier if the wireless transmission is judged to be carried out, and giving up receiving physical layer data on the target subframe of the first carrier if the wireless transmission is judged not to be carried out;
wherein the first carrier is deployed in an unlicensed spectrum; the first signaling is signaling which is sent by the base station last time before the target subframe and is used for indicating the COT (cell on the first carrier) of a sending cell of the second signaling; the first COT occupies K continuous subframes, wherein K is a positive integer; the second signaling is DCI for scheduling uplink transmission.
7. The method of claim 6, wherein the step B comprises the steps of:
-a step b1. determining that the wireless transmission is implemented; wherein the target-subframe belongs to a first COT.
8. The method of claim 6, wherein the step B comprises the steps of:
-step b2. determining by itself whether the wireless transmission is implemented; or the wireless transmission is downlink transmission, and the wireless transmission is judged not to be implemented;
wherein the target-subframe is a subframe other than the first COT.
9. The method according to any of claims 6 to 8, wherein the wireless transmission is an uplink transmission and the redundancy version of the physical layer data is the redundancy version corresponding to the target subframe assuming no uplink transmission condition is discarded in the current HARQ process.
10. The method according to any of claims 6-8, wherein a starting subframe of the first COT is a first subframe.
11. A user equipment, characterized in that the equipment comprises:
a first module: the first sub-frame and the second sub-frame are used for receiving a first signaling and a second signaling respectively; the first signaling indicates a first COT on a first carrier, the second signaling triggers wireless transmission on a target subframe of the first carrier, and the wireless transmission is uplink transmission;
a second module: the method is used for judging whether the wireless transmission is implemented in an auxiliary manner according to whether the target subframe belongs to a first COT; the wireless transmission is uplink transmission, if the wireless transmission is judged to be implemented, physical layer data is sent on the target subframe of the first carrier, and if the wireless transmission is judged not to be implemented, the physical layer data is abandoned to be sent on the target subframe of the first carrier;
wherein the first carrier is deployed in an unlicensed spectrum; the first signaling is signaling which is received by the user equipment last time before the target subframe and is used for indicating the COT of the serving cell of the user equipment on a first carrier; the first COT occupies K continuous subframes, wherein K is a positive integer; the second signaling is DCI for scheduling uplink transmission.
12. The UE of claim 11, wherein the second module determines that the wireless transmission is performed; wherein the target-subframe belongs to a first COT.
13. The UE of claim 11, wherein the second module performs an LBT operation on a subframe previous to the target subframe on a first carrier to determine whether the wireless transmission is performed;
wherein the target-subframe is a subframe other than the first COT.
14. The UE of any one of claims 11 to 13, wherein the redundancy version of the physical layer data is the redundancy version corresponding to the target subframe under the condition that no uplink transmission is discarded in the current HARQ process.
15. The UE of any of claims 11 to 13, wherein a starting subframe of the first COT is a first subframe.
16. A base station apparatus, characterized in that the apparatus comprises:
a first module: the first signaling and the second signaling are respectively sent in the first subframe and the second subframe; the first signaling indicates a first COT on a first carrier, the second signaling triggers wireless transmission on a target subframe of the first carrier, and the wireless transmission is uplink transmission;
a second module: the method is used for judging whether the wireless transmission is implemented in an auxiliary manner according to whether the target subframe belongs to a first COT; receiving physical layer data on the target subframe of the first carrier if the wireless transmission is judged to be carried out, and giving up receiving physical layer data on the target subframe of the first carrier if the wireless transmission is judged not to be carried out;
wherein the first carrier is deployed in an unlicensed spectrum; the first signaling is signaling which is sent by the base station last time before the target subframe and is used for indicating the COT (cell on the first carrier) of a sending cell of the second signaling; the first COT occupies K continuous subframes, wherein K is a positive integer; the second signaling is DCI for scheduling uplink transmission.
17. The base station device of claim 16, wherein the second module determines that the wireless transmission is performed; wherein the target-subframe belongs to a first COT.
18. The base station device of claim 16, wherein the second module determines whether the wireless transmission is performed;
wherein the target-subframe is a subframe other than the first COT.
19. The base station apparatus of any of claims 16-18, wherein the wireless transmission is an uplink transmission, and wherein the redundancy version of the physical layer data is the redundancy version corresponding to the target subframe assuming no uplink transmission is discarded in the current HARQ process.
20. The base station apparatus of any of claims 16 to 18, wherein a starting subframe of the first COT is a first subframe.
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| US10512033B2 (en) * | 2015-01-29 | 2019-12-17 | Qualcomm Incorporated | Timing information for discovery in unlicensed spectrum |
| EP3520528B1 (en) * | 2016-09-29 | 2021-05-26 | Telefonaktiebolaget LM Ericsson (publ) | Coordination of scheduled and contention-based uplink transmissions |
| CN107889114B (en) * | 2016-09-30 | 2023-11-17 | 华为技术有限公司 | Method and equipment for occupying unlicensed spectrum channels |
| SG11201909705UA (en) | 2017-04-20 | 2019-11-28 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Method, apparatus and system for transmitting periodic uplink information/signals |
| CN110932829B (en) * | 2018-09-20 | 2022-04-01 | 维沃移动通信有限公司 | Transmission time indication method of unlicensed frequency band, network equipment and terminal |
| CN109417801B (en) * | 2018-09-29 | 2023-12-12 | 北京小米移动软件有限公司 | Method, device and base station for transmitting information |
| CN111432423B (en) * | 2019-01-10 | 2021-11-19 | 华为技术有限公司 | Resource allocation method and device |
| CN113170317A (en) * | 2019-01-21 | 2021-07-23 | Oppo广东移动通信有限公司 | Communication method and device for unlicensed spectrum |
| CN109891791B (en) | 2019-02-01 | 2023-06-27 | 北京小米移动软件有限公司 | Method and device for scheduling hybrid automatic repeat request |
| WO2021147062A1 (en) * | 2020-01-23 | 2021-07-29 | Qualcomm Incorporated | User equipment as initiating device in frame based equipment mode |
| KR20220137700A (en) * | 2020-02-06 | 2022-10-12 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | Transmission resource determination method and apparatus, communication device |
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| CN105530647B (en) | 2019-09-06 |
| CN110035439A (en) | 2019-07-19 |
| CN105530647A (en) | 2016-04-27 |
| CN110049564A (en) | 2019-07-23 |
| CN110035439B (en) | 2023-02-28 |
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