CN110505708B - Method and device for scheduling unlicensed spectrum communication - Google Patents
Method and device for scheduling unlicensed spectrum communication Download PDFInfo
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- CN110505708B CN110505708B CN201910721311.XA CN201910721311A CN110505708B CN 110505708 B CN110505708 B CN 110505708B CN 201910721311 A CN201910721311 A CN 201910721311A CN 110505708 B CN110505708 B CN 110505708B
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Abstract
The invention provides a method and a device for scheduling unlicensed spectrum communication. As an embodiment, the base station sends a first signaling indication to the first resource pool in step one; transmitting a target subframe of a second signaling scheduling target carrier in the second step; physical layer data is processed in the target subframe in step three. The first resource pool comprises K groups of resource slices, and the target carrier is deployed in an unlicensed spectrum. The resource slice is K1 consecutive symbols in the time domain. The base station maintains zero power in a first resource pool. The scheme of the invention can ensure that LTE devices of different operators mutually detect the mutual interference. In addition, the scheme of the invention ensures that the LTE equipment can monitor the interference source in a TDM mode when transmitting the physical layer data on a plurality of continuous subframes, and timely executes DFS operation. In addition, the invention is compatible with the existing LTE standard as much as possible, and has good compatibility.
Description
The application is a divisional application of the following original applications:
application date of the original application: 2014, 06 months and 10 days
- -application number of the original application: 201410255478.9
The invention of the original application is named: method and device for scheduling unlicensed spectrum communication
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 (3 rd 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 3GPP RAN discusses a new research topic, namely the study of unlicensed spectrum synthesis (RP-132085), and the main objective is to study Non-standalone (Non-persistent) deployments using LTE over unlicensed spectrum, where communication over unlicensed spectrum is to be associated with serving cells over licensed spectrum. An intuitive approach is to reuse the concept of CA (Carrier Aggregation) in the existing system as much as possible, i.e., a serving Cell deployed on a licensed spectrum as a Pcell (Primary Cell) and a serving Cell deployed on an unlicensed spectrum as a Scell (Secondary Cell).
For unlicensed spectrum, LTE may employ LBT (Listen Before Talk) on unlicensed spectrum to avoid interference, taking into account its uncontrollable/predictable interference level. LBT, i.e. a base station or UE (User Equipment), first listens to the received power on an unlicensed spectrum before transmitting a signal, and if it is determined from the received power that there are no interferers on the unlicensed spectrum, then a signal is transmitted on the unlicensed spectrum, otherwise no signal is transmitted. In addition, in order to avoid interference to, for example, radar signals in an unlicensed spectrum, the LTE device may apply a DFS (Dynamic Frequency Selection) technique, that is, dynamically selecting a carrier with a satisfactory channel quality from a plurality of candidate carriers for transmitting a signal.
For LTE unlicensed spectrum communication, one problem to be solved is how to set listening slots for listening to the presence of interferers on the unlicensed spectrum. An intuitive idea is to set the listening slot at a fixed location (e.g. the first symbol of each subframe), however this idea has the following problems: if the LTE devices of two operators perform LBT on the same carrier, the signals of each other cannot be detected. In order to solve the above problem, the invention discloses a method and a device for scheduling unlicensed spectrum communication.
Disclosure of Invention
The invention discloses a method in a base station, which comprises the following steps:
-sending a first signaling indicating a first resource pool
-transmitting a second signaling, the second signaling scheduling a target subframe of a target carrier
-processing physical layer data in the target subframe of the target carrier according to the scheduling of the second signalling
The first resource pool comprises K groups of resource slices, and the target carrier is deployed in an unlicensed spectrum. The resource slice is one of the following in time domain:
-option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
K1 continuous symbols in the target subframe belong to a group of resource slices of a first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool. The processing is sending and the second signaling is downlink scheduling signaling, or the processing is receiving and the second signaling is uplink scheduling signaling, the K1 is a positive integer, the K is a positive integer, the N is a positive integer, and the base station keeps zero power in the first resource pool.
The symbol is an OFDM (Orthogonal Frequency Division Multiplexing) symbol or an SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbol. One subframe includes 12 or 14 symbols. The first signaling is either physical layer signaling or higher layer signaling. The second signaling is either physical layer signaling or higher layer signaling. The downlink scheduling signaling refers to signaling for scheduling downlink data transmission; the uplink scheduling signaling refers to signaling for scheduling uplink data transmission. As an embodiment, the Downlink scheduling signaling is one of DCI (Downlink Control Information) formats {1,1a,1b,1c,1d,2,2a,2b,2c,2d }. As yet another embodiment, the uplink scheduling signaling is one of DCI formats {0,4 }.
For one embodiment, the second signaling schedules a plurality of subframes, including the target subframe. As an example, K1 is 1. As yet another example, K1 is 2. As an example, N is an integer multiple of 10. As an embodiment, the K sets of resource tiles have M candidate patterns distributed in the time domain, the M candidate patterns are predetermined, the first signaling indicates an index of one candidate pattern among the M candidate patterns, and M is a positive integer greater than 1. As one embodiment, the physical layer data includes DMRS (Demodulation Reference Signal) for channel estimation. As yet another embodiment, the physical layer data includes a CSI-RS (Channel Status Indicator-Reference Signal) for Channel quality detection. As yet another example, the physical layer data includes SRS (Sounding Reference Signal).
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-detecting one or both of { received signal power, signature sequence } in a listening slot on the target carrier.
Wherein the listening time slot belongs to a first resource pool in a time domain.
The signature sequence is used for identifying LTE equipment, so that the base station can distinguish whether an interference source is the LTE equipment. As an embodiment, the signature sequence is a ZC (Zad-Off Chu) sequence. As yet another embodiment, the signature sequence is a pseudo-random sequence. As yet another embodiment, the signature sequence includes a ZC sequence and a pseudorandom sequence. As an embodiment, the listening time slot includes K sets of listening resources, and the K sets of listening resources belong to the K sets of resource slices respectively in a time domain. As a sub-embodiment of the above embodiment, a group of the sensing resources is a part of time domain resources in its corresponding resource slice in time domain — the remaining time domain resources are used for, for example, transmission/reception switching of a radio frequency circuit.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-receiving third signaling on the target carrier, the third signaling indicating a second resource pool, the third signaling being broadcast signaling
The second resource pool comprises K groups of resource slices, and at least one group of resource slices in the first resource pool is orthogonal to the second resource pool in the time domain.
The orthogonality means that there is no overlap at all in the time domain. As one embodiment, the first resource pool and the second resource pool are orthogonal.
Specifically, according to an aspect of the present invention, K is greater than 1, and at most 1 group of the resource slices is included in one subframe.
In particular, according to one aspect of the invention, it is characterized in that the first signaling is a broadcast signaling transmitted on said target carrier.
The broadcast signaling is non-UE specific signaling. The essence of the above aspect is that the communication device of the other operator that listens to the target carrier can receive the first signaling and obtain the listening slot of the base station, and thus can adjust the listening slot of the communication device.
Specifically, according to one aspect of the present invention, the first signaling is physical layer signaling and the resource slice is the option one, or the first signaling is higher layer signaling and the resource slice is the option two.
In particular, according to one aspect of the invention, it is characterized in that the first signaling comprises at least one of:
-ZC sequence
-pseudo-random sequence
-information bits.
As an embodiment, the ZC sequence is a PSS (Primary synchronization signal). As an implementation, the pseudo-random sequence is SSS (Secondary synchronization signal).
Specifically, according to an aspect of the present invention, the K1 consecutive symbols belong to one subframe, and the K1 consecutive symbols and a symbol including a DMRS (Demodulation Reference Signal) are orthogonal in a time domain.
I.e. the K1 consecutive symbols are symbols of a non-DMRS in one subframe.
The above aspects avoid the DMRS modification and ensure compatibility with existing systems.
The invention discloses a method in a base station, which comprises the following steps:
-receiving first signaling on a target carrier, the first signaling indicating a first resource pool
The first signaling is broadcast signaling, the first resource pool comprises K groups of resource slices, and the target carrier is deployed in an unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occur periodically with a period of N subframes.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-transmitting a communication signal in the first resource pool.
As one embodiment, the communication signal includes one or more of a { ZC sequence, a pseudo-random sequence, information bits }. As a further embodiment, the communication signal is a signal with non-zero power, which is determined by the base station itself, i.e. the transmitting base station of the first signaling is informed only by the power that there is an interference source on the target carrier. As yet another embodiment, the communication signal is physical layer data.
The invention discloses a method in UE, which comprises the following steps:
-receiving first signaling indicating a first resource pool
-receiving a second signaling, the second signaling scheduling a target subframe of a target carrier
-operating physical layer data in the target subframe of the target carrier according to the scheduling of the second signalling
The first resource pool comprises K groups of resource slices, and the target carrier is deployed in an unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
K1 continuous symbols in the target subframe belong to a group of resource slices of a first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool. The operation is receiving and the second signaling is downlink scheduling signaling, or the operation is transmitting and the second signaling is uplink scheduling signaling, the K1 is a positive integer, the K is a positive integer, the N is a positive integer, and the UE maintains zero power in the first resource pool.
Specifically, according to one aspect of the present invention, the method further comprises the following steps:
-detecting one or both of { received signal power, signature sequence } in a listening slot on the target carrier.
Wherein the listening time slot belongs to a first resource pool in a time domain.
Specifically, according to an aspect of the present invention, K is greater than 1, and at most 1 group of the resource slices is included in one subframe.
In particular, according to one aspect of the invention, it is characterized in that the first signaling is broadcast signaling transmitted on said target carrier.
Specifically, according to one aspect of the present invention, the first signaling is physical layer signaling and the resource slice is the option one, or the first signaling is higher layer signaling and the resource slice is the option two.
In particular, according to one aspect of the invention, it is characterized in that the first signaling comprises at least one of:
-ZC sequence
-pseudo-random sequence
-information bits
Specifically, according to an aspect of the present invention, wherein the K1 consecutive symbols belong to one subframe, and the K1 consecutive symbols and the symbols including the DMRS are orthogonal in a time domain.
The invention discloses a base station device, which is characterized by comprising:
a first module: for transmitting a first signaling indicating a first resource pool
A second module: for transmitting a second signaling, the second signaling scheduling a target sub-frame of a target carrier
A third module: for processing physical layer data in the target subframe of the target carrier according to scheduling of a second signaling
A fourth module: for detecting one or both of { received Signal Power, signature sequence } in a listening slot on the target Carrier
The first resource pool comprises K groups of resource slices, and the target carrier is deployed in an unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
K1 continuous symbols in the target subframe belong to a group of resource slices of a first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool. The processing is sending and the second signaling is downlink scheduling signaling, or the processing is receiving and the second signaling is uplink scheduling signaling, the K1 is a positive integer, the K is a positive integer, the N is a positive integer, and the base station keeps zero power in the first resource pool. The listening time slot belongs to a first resource pool in a time domain.
As an embodiment, the above apparatus further comprises:
a fifth module: for receiving a third signaling on the target carrier, the third signaling indicating a second resource pool, the third signaling being a broadcast signaling
The second resource pool comprises K groups of resource slices, and at least one group of resource slices in the first resource pool is orthogonal to the second resource pool in time domain.
The invention discloses a base station device, which is characterized by comprising:
a first module: for receiving first signaling on a target carrier, the first signaling indicating a first resource pool
A second module: for transmitting communication signals in a first resource pool
The first signaling is broadcast signaling, the first resource pool comprises K groups of resource slices, and the target carrier is deployed in an unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occur periodically with a period of N subframes.
The invention discloses a user equipment, which is characterized by comprising:
a first module: for receiving a first signaling indicating a first resource pool
A second module: for receiving a second signaling, the second signaling scheduling a target sub-frame of a target carrier
A third module: for operating physical layer data in the target subframe of the target carrier according to scheduling of second signaling
The first resource pool comprises K groups of resource slices, and the target carrier is deployed in an unlicensed spectrum. The resource slice is one of the following in time domain:
-option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
K1 continuous symbols in the target subframe belong to a group of resource slices of a first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool. The operation is receiving and the second signaling is downlink scheduling signaling, or the operation is transmitting and the second signaling is uplink scheduling signaling, the K1 is a positive integer, the K is a positive integer, the N is a positive integer, and the UE maintains zero power in the first resource pool.
As an embodiment, the above apparatus is characterized in that the apparatus further comprises:
a fourth module: for detecting one or both of { received signal power, signature sequence } in a listening slot on the target carrier.
Wherein the listening time slot belongs to a first resource pool in a time domain.
The invention provides a scheduling method and device for unlicensed spectrum communication, aiming at the problem of setting of a listening time slot for listening to an interference source in the LTE unlicensed spectrum communication. The scheme of the invention can ensure that LTE equipment of different operators mutually detect the interference of each other. In addition, the scheme of the invention ensures that the LTE equipment can listen to the interference source in a TDM (Time Division Multiplexing) mode when transmitting the physical layer data on a plurality of continuous subframes, and timely executes DFS operation. In addition, the invention is compatible with the existing LTE standard as much as possible, and has good compatibility.
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 illustrates a flow diagram for transmitting downlink physical layer data according to an embodiment of the present invention;
FIG. 2 illustrates a flow diagram for transmitting uplink physical layer data according to one embodiment of the present invention;
FIG. 3 shows a flow diagram of a base station transmitting a communication signal according to one embodiment of the invention;
FIG. 4 shows a distribution diagram of a first resource pool and a second resource pool according to an embodiment of the invention;
FIG. 5 illustrates a diagram where resource tiles are periodically occurring symbols in accordance with one embodiment of the present invention;
FIG. 6 illustrates a schematic diagram of a resource slice within a physical layer data transport subframe according to one embodiment of the invention;
FIG. 7 shows a schematic diagram of symbols that can be set as resource tiles in accordance with one embodiment of the invention;
fig. 8 shows a block diagram of a processing means in a base station according to an embodiment of the invention;
fig. 9 shows a block diagram of a processing device in a UE according to an embodiment of the invention;
fig. 10 shows a block diagram of a processing means in a base station according to a further 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
For the base station N1, in step S11, a first signaling is sent, where the first signaling indicates a first resource pool; in step S12, a second signaling is sent, and the second signaling schedules a target subframe of a target carrier; and in step S13, transmitting physical layer data in the target subframe of the target carrier according to the scheduling of the second signaling.
For UE U2, in step S21, a first signaling is received, where the first signaling indicates a first resource pool; in step S22, receiving a second signaling, where the second signaling schedules a target subframe of a target carrier; in step S23, physical layer data is received in the target subframe of the target carrier according to the scheduling of the second signaling.
In embodiment 1, the first resource pool includes K sets of resource tiles, and the target carrier is deployed in an unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
K1 continuous symbols in the target subframe belong to a group of resource slices of a first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool. The second signaling is downlink scheduling signaling, the K1 is a positive integer, the K is a positive integer, the N is a positive integer, and the base station N1 and the UE U2 both maintain zero power in the first resource pool.
As sub-embodiment 1 of embodiment 1, in step S10, the base station N1 receives a third signaling sent by the base station N0, where the third signaling indicates a second resource pool. The second resource pool comprises K groups of resource slices, and at least one group of resource slices in the first resource pool is orthogonal to the second resource pool in the time domain.
As sub-embodiment 2 of embodiment 1, in step S14, the base station N1 detects the received signal power in the listening slot on the target carrier. Wherein the listening time slot belongs to a first resource pool in a time domain. If the power of the received signal is larger than a specific threshold value, the base station N1 determines that an interference source exists on the target carrier wave; if the received signal power is not greater than the specific threshold, the base station N1 determines that no interference source exists on the target carrier. The particular threshold is predetermined or configurable.
As sub-embodiment 3 of embodiment 1, in step S14, the base station N1 detects the received signal power and the signature sequence in a listening slot on the target carrier, where the listening slot belongs to the first resource pool in the time domain. The method for detecting the received signal power and the characteristic sequence comprises the following steps:
for the received signal y, the base station N1 first detects whether a signature sequence exists in the listening slot according to Coherent Detection (Coherent Detection) or Non-Coherent Detection (Non-Coherent Detection):
-if no signature sequence is detected, the base station N1 detects the received signal power | y- 2 If y is not zero 2 If the number of interference sources is larger than a specific threshold value, the base station N1 determines that the interference sources of the non-LTE equipment exist on the target carrier wave, and if y is larger than the threshold value 2 And if not, the base station N1 determines that no interference source exists on the target carrier.
-if the signature sequence s is detected, the base station N1 determines that an interference source of the LTE system exists on the target carrier; base station N1 further detects residual power | y- 2 -|s| 2 If the residual power is greater than a specific threshold, the base station N1 determines that an interference source of the non-LTE device exists on the target carrier, and if the residual power is not greater than the specific threshold, the base station N1 determines that the interference source does not exist on the target carrier.
The particular threshold is predetermined or configurable.
As sub-embodiment 4 of embodiment 1, the first signaling comprises at least one of:
-ZC sequence
-pseudo-random sequence
-information bits.
Example 2
For the base station N3, in step S31, a first signaling is sent, the first signaling indicating a first resource pool; in step S32, a second signaling is sent, and the second signaling schedules a target subframe of a target carrier; and receiving physical layer data in the target subframe of the target carrier according to the scheduling of the second signaling in step S33.
For UE U4, in step S41, a first signaling is received, where the first signaling indicates a first resource pool; in step S42, receiving a second signaling, where the second signaling schedules a target subframe of a target carrier; in step S43, physical layer data is transmitted in the target subframe of the target carrier according to the scheduling of the second signaling.
In embodiment 2, the first resource pool includes K sets of resource tiles, and the target carrier is deployed in the unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
K1 continuous symbols in the target subframe belong to a group of resource slices of a first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool. The second signaling is uplink scheduling signaling, the K1 is a positive integer, the K is a positive integer, the N is a positive integer, and the base station N3 and the UE U4 both maintain zero power in the first resource pool.
As sub-embodiment 1 of embodiment 2, the K is greater than 1, and at most 1 group of the resource slices is included in one subframe.
As a sub-embodiment 2 of embodiment 2, the first signaling is broadcast signaling transmitted on the target carrier.
As sub-embodiment 3 of embodiment 2, the first signaling is physical layer signaling and the resource slice is the option one.
As sub-embodiment 4 of embodiment 2, the first signaling is a higher layer signaling and the resource slice is the option two.
Example 3
For the base station N5, in step S51, a first signaling is sent, the first signaling indicating a first resource pool; in step S52, one or both of { received signal power, signature sequence } are detected in a listening slot on the target carrier.
For the base station N6, in step S61, a first signaling is received on the target carrier, where the first signaling indicates a first resource pool; in step S62, a communication signal is transmitted in a first resource pool.
In embodiment 3, the first signaling is broadcast signaling, the first resource pool includes K sets of resource slices, and the target carrier is deployed in an unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
The K1 is a positive integer, the K is a positive integer, the N is a positive integer, and the base station keeps zero power in a first resource pool. The listening time slot belongs to a first resource pool in a time domain.
As sub-embodiment 1 of embodiment 3, the communication signal is physical layer data, and the base station N5 detects the received signal power to determine whether there is an interference source in step S52.
As sub-embodiment 2 of embodiment 3, the communication signal is a signature sequence, and the base station N5 detects the signature sequence in step S52 to determine whether there is an LTE system interference source, and detects the received signal power to determine whether there is a non-LTE system interference source.
Example 4
Example 4 illustrates a distribution diagram of a first resource pool and a second resource pool, as shown in fig. 4. In fig. 4, the diagonal grid is a resource slice of the first resource pool, and the reverse diagonal grid is a resource slice of the second resource pool.
For a base station, first receiving a third signaling on a target carrier, wherein the third signaling indicates a second resource pool, and the third signaling is a physical layer broadcast signaling; first signaling is then sent, the first signaling indicating a first resource pool.
The resource pool includes K groups of resource slices, and the configuration period in fig. 4 is a configuration time window for configuring the resource pool by the first signaling and the third signaling, and includes L subframes, where L is a positive integer greater than K. The target carrier is deployed in an unlicensed spectrum. The resource slice is K1 consecutive symbols in the time domain. The first signaling is physical layer broadcast signaling. The K1 is a positive integer, the K is a positive integer, and the base station keeps zero power in the first resource pool. The K resource pieces of the first resource pool are respectively marked by oblique line grids from 1 to K in the attached drawing 4, the K resource pieces of the second resource pool are respectively marked by reverse oblique line grids from 1 to K in the attached drawing 4, wherein the grid marked by the number 3 belongs to the first resource pool and the second resource pool at the same time.
Example 5
The first resource pool comprises K groups of resource slices, wherein the resource slices are K1 continuous symbols which appear periodically in a time domain, and the appearance period is N subframes. In fig. 5, one oblique line square is K1 continuous symbols, and oblique line squares identifying the same number (1 to K) form a group of the resource pieces.
Example 6
For a base station, first sending a first signaling, wherein the first signaling indicates a first resource pool; then sending a second signaling, wherein the second signaling schedules a subframe 1 of a target carrier; the physical layer data is then processed in subframe 1. For UE, first receiving a first signaling, wherein the first signaling indicates a first resource pool; then receiving a second signaling, wherein the second signaling schedules a subframe 1 of a target carrier; the physical layer data is then operated in subframe 1.
In embodiment 6, the first resource pool includes K sets of resource tiles, and the target carrier is deployed in the unlicensed spectrum. The resource slice is one of the following in time domain:
-option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
The subframe 1 includes a group of resource slices in which the K1 continuous symbols (shown as blank squares) belong to a first resource pool, and the physical layer data occupies the symbols (shown as diagonal squares in the subframe 1) except the symbols belonging to the first resource pool in the subframe 1. The processing is transmitting and the operation is receiving and the second signaling is downlink scheduling signaling, or the processing is receiving and the operation is transmitting and the second signaling is uplink scheduling signaling, the K1 is a positive integer, the K is a positive integer, the N is a positive integer, and the base station and the UE maintain zero power in the first resource pool.
As sub-embodiment 1 of embodiment 6, said K1 is 1 or 2.
As sub-embodiment 2 of embodiment 6, compared with subframes (e.g., subframe 2 and subframe 3) that do not include symbols in the first resource pool, the physical layer data in subframe 1 adopts a mapping manner of puncturing (punture) or Rate Matching (Rate Matching).
As sub-embodiment 3 of embodiment 6, subframe 2 and subframe 3 in fig. 6 are also used for transmitting physical layer data (diagonal grid), so the present invention provides a mechanism that LTE equipment can also detect an interference source in the middle of multiple consecutive subframes for transmitting data, and further perform DFS operation in time.
Example 7
As shown in fig. 7, symbols 0,1,2,3,4,7,8,9, 10, 11 in one subframe can be set as symbols of a resource slice.
Example 8
The sending module 202 is configured to send a first signaling, where the first signaling indicates a first resource pool; the sending module 203 is configured to send a second signaling, where the second signaling schedules a target subframe of a target carrier; the processing module 204 is configured to process physical layer data in the target subframe of the target carrier according to scheduling of a second signaling; the listening module 205 is configured to detect one or both of { received signal power, signature sequence } in a listening slot on the target carrier.
In embodiment 8, the first resource pool includes K sets of resource tiles, and the target carrier is deployed in the unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
K1 continuous symbols in the target subframe belong to a group of resource slices of a first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool. The processing is sending and the second signaling is downlink scheduling signaling, or the processing is receiving and the second signaling is uplink scheduling signaling, K1 is a positive integer, K is a positive integer greater than 1, and N is a positive integer. The listening time slot belongs to a first resource pool in a time domain, and the base station keeps zero power in the first resource pool. The second signaling is physical layer signaling.
As sub-embodiment 1 of embodiment 8, the processing apparatus 200 further includes a receiving module 201 configured to receive a third signaling on the target carrier, where the third signaling indicates a second resource pool, and the third signaling is broadcast signaling. The second resource pool comprises K groups of resource slices, and at least one group of resource slices in the first resource pool is orthogonal to the second resource pool in time domain.
As sub-embodiment 2 of embodiment 8, said K1 is equal to 1 or 2.
As sub-embodiment 3 of embodiment 8, the first signaling is a ZC sequence or a pseudo-random sequence.
Example 9
The receiving module 301 is configured to receive a first signaling, where the first signaling indicates a first resource pool; the receiving module 302 is configured to receive a second signaling, where the second signaling schedules a target subframe of a target carrier; the operation module 303 is configured to operate physical layer data in the target subframe of the target carrier according to the scheduling of the second signaling.
In embodiment 9, the first resource pool includes K sets of resource tiles, and the target carrier is deployed in the unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occurring periodically with a period of N subframes
K1 continuous symbols in the target subframe belong to a group of resource slices of a first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool. The operation is receiving and the second signaling is downlink scheduling signaling, or the operation is transmitting and the second signaling is uplink scheduling signaling, the K1 is a positive integer, the K is a positive integer greater than 1, the N is a positive integer, and the UE maintains zero power in the first resource pool.
As sub-embodiment 1 of embodiment 9, said K1 is equal to 1 or 2.
As sub-embodiment 2 of embodiment 9, the first signaling is physical layer signaling and the resource slice is the option one.
Example 10
The receiving module 401 is configured to receive a first signaling on a target carrier, where the first signaling indicates a first resource pool; the transmitting module 402 is configured to transmit a communication signal in a first resource pool.
The first signaling is broadcast signaling, the first resource pool comprises K groups of resource slices, and the target carrier is deployed in an unlicensed spectrum. The resource slice is one of the following in time domain:
option one, K1 consecutive symbols
K1 consecutive symbols occur periodically with a period of N subframes.
The communication signal is one of { physical layer data, a signature sequence, a self-determined non-zero power signal }.
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 base station, comprising the steps of:
-transmitting first signaling, the first signaling indicating a first resource pool;
-transmitting second signaling, the second signaling scheduling a target subframe of a target carrier;
-transmitting physical layer data in the target subframe of the target carrier according to a scheduling of a second signaling;
wherein the first signaling is physical layer signaling and the first signaling is broadcast signaling transmitted on the target carrier; the first resource pool comprises a group of resource slices, and the target carrier is deployed in an unlicensed spectrum; the resource slice is K1 consecutive symbols in the time domain; the set of resource tiles has M candidate patterns distributed in the time domain, the M candidate patterns are predetermined, the first signaling indicates an index of one candidate pattern among the M candidate patterns, and M is a positive integer greater than 1; k1 continuous symbols in the target subframe belong to the group of resource slices of the first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool; the second signaling is downlink scheduling signaling, the K1 is a positive integer, and the base station keeps zero power in the first resource pool.
2. The method of claim 1, comprising:
detecting one or two of received signal power and a characteristic sequence in a listening time slot on the target carrier wave;
wherein the listening time slot belongs to a first resource pool in a time domain.
3. The method according to claim 1 or 2, characterized in that the first signaling comprises at least one of:
-a ZC sequence;
-a pseudo-random sequence;
-information bits.
4. The method according to claim 1 or 2, wherein the K1 consecutive symbols belong to one subframe, and wherein the K1 consecutive symbols and the symbols comprising the DMRS are orthogonal in time domain.
5. The method according to claim 1 or 2, wherein the physical layer data comprises a DMRS for channel estimation; alternatively, the physical layer data includes CSI-RS for channel quality detection.
6. A method in a UE, comprising the steps of:
-receiving first signalling, the first signalling indicating a first resource pool;
-receiving second signaling, the second signaling scheduling a target subframe of a target carrier;
-receiving physical layer data in the target subframe of the target carrier according to a scheduling of a second signaling;
wherein the first signaling is physical layer signaling and the first signaling is broadcast signaling transmitted on the target carrier; the first resource pool comprises a group of resource slices, and the target carrier is deployed in an unlicensed spectrum; the resource slice is K1 consecutive symbols in the time domain; the set of resource tiles has M candidate patterns distributed in the time domain, the M candidate patterns are predetermined, the first signaling indicates an index of one candidate pattern among the M candidate patterns, and M is a positive integer greater than 1; k1 continuous symbols in the target subframe belong to the group of resource slices of the first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool; the second signaling is downlink scheduling signaling, the K1 is a positive integer, and the UE keeps zero power in the first resource pool.
7. The method of claim 6, comprising:
detecting one or two of received signal power and a characteristic sequence in a listening time slot on the target carrier wave;
wherein the listening time slot belongs to a first resource pool in a time domain.
8. The method according to claim 6 or 7, characterized in that the first signaling comprises at least one of:
-a ZC sequence;
-a pseudo-random sequence;
-information bits.
9. The method according to claim 6 or 7, wherein the K1 consecutive symbols belong to one subframe, and wherein the K1 consecutive symbols and the symbols comprising the DMRS are orthogonal in the time domain.
10. The method according to claim 6 or 7, wherein the physical layer data comprises a DMRS for channel estimation; alternatively, the physical layer data includes CSI-RS for channel quality detection.
11. A base station apparatus, characterized in that the apparatus comprises:
a first module: the first signaling is used for sending a first signaling, and the first signaling indicates a first resource pool;
a second module: the target subframe is used for sending a second signaling, and the second signaling schedules a target carrier;
a third module: transmitting physical layer data in the target subframe of the target carrier according to scheduling of a second signaling;
wherein the first signaling is physical layer signaling and the first signaling is broadcast signaling transmitted on the target carrier; the first resource pool comprises a group of resource slices, and the target carrier is deployed in an unlicensed spectrum; the resource slice is K1 consecutive symbols in the time domain; the set of resource tiles is distributed with M candidate patterns in a time domain, the M candidate patterns are predetermined, a first signaling indicates an index of one candidate pattern among the M candidate patterns, and M is a positive integer greater than 1; k1 continuous symbols in the target subframe belong to the group of resource slices of the first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool; the second signaling is downlink scheduling signaling, and the K1 is a positive integer; the base station maintains zero power in a first resource pool.
12. The base station apparatus according to claim 11, characterized by comprising:
a fourth module: detecting one or two of received signal power and a characteristic sequence in a listening time slot on the target carrier wave;
wherein the listening time slot belongs to a first resource pool in a time domain.
13. The base station apparatus according to claim 11 or 12, wherein the first signaling comprises at least one of:
-a ZC sequence;
-a pseudo-random sequence;
-information bits.
14. The base station apparatus of claim 11 or 12, wherein the K1 consecutive symbols belong to one subframe, and wherein the K1 consecutive symbols and the symbols comprising the DMRS are orthogonal in time domain.
15. The base station apparatus according to claim 11 or 12, wherein the physical layer data includes DMRS for channel estimation; alternatively, the physical layer data includes CSI-RS for channel quality detection.
16. A user equipment, characterized in that the equipment comprises:
a first module: for receiving a first signaling, the first signaling indicating a first resource pool;
a second module: the second signaling is used for receiving the second signaling, and the second signaling schedules a target subframe of a target carrier;
a third module: receiving physical layer data in the target subframe of the target carrier according to scheduling of second signaling;
wherein the first signaling is physical layer signaling and the first signaling is broadcast signaling transmitted on the target carrier; the first resource pool comprises a group of resource slices, and the target carrier is deployed in an unlicensed spectrum; the resource slice is K1 consecutive symbols in the time domain; the set of resource tiles has M candidate patterns distributed in the time domain, the M candidate patterns are predetermined, the first signaling indicates an index of one candidate pattern among the M candidate patterns, and M is a positive integer greater than 1; k1 continuous symbols in the target subframe belong to the group of resource slices of the first resource pool, and the physical layer data occupies the symbols in the target subframe except the symbols belonging to the first resource pool; the second signaling is downlink scheduling signaling, and the K1 is a positive integer; the user equipment maintains zero power in the first resource pool.
17. The user equipment as recited in claim 16, comprising:
a fourth module: the method comprises the steps of detecting one or two of received signal power and a characteristic sequence in a listening time slot on the target carrier wave;
wherein the listening time slot belongs to a first resource pool in a time domain.
18. The user equipment as claimed in claim 16 or 17, wherein the first signaling comprises at least one of:
-a ZC sequence;
-a pseudo-random sequence;
-information bits.
19. The user equipment according to claim 16 or 17, wherein the K1 consecutive symbols belong to one subframe, and wherein the K1 consecutive symbols and the symbols comprising the DMRS are orthogonal in time domain.
20. The user equipment as claimed in claim 16 or 17, wherein the physical layer data comprises DMRS for channel estimation; alternatively, the physical layer data includes CSI-RS for channel quality detection.
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| KR102574506B1 (en) * | 2016-01-29 | 2023-09-05 | 한국전자통신연구원 | Method and apparatus for transmitting signal in unlicensed band communication system, method and apparatus for uplink scheduling, and method and apparatus for transmitting information about channel status measurement period |
| CN109076603B (en) * | 2016-03-28 | 2022-08-19 | 英特尔公司 | Listen before talk for uplink transmissions |
| WO2017199205A1 (en) | 2016-05-20 | 2017-11-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Scheduling multiple subframes in unlicensed spectrum |
| CN110636622B (en) * | 2016-06-06 | 2022-12-27 | 上海朗帛通信技术有限公司 | Method and device in wireless communication |
| US10611322B2 (en) | 2016-06-21 | 2020-04-07 | Samsung Electronics Co., Ltd. | System and method of reducing interruptions for vehicle to vehicle communication |
| CN107682931A (en) * | 2016-08-09 | 2018-02-09 | 深圳市金立通信设备有限公司 | A kind of data communications method and device |
| CN113839764A (en) * | 2017-03-06 | 2021-12-24 | 上海朗桦通信技术有限公司 | Method and device used in user equipment and base station for dynamic scheduling |
| CN108882303B (en) * | 2017-05-08 | 2020-09-25 | 大唐移动通信设备有限公司 | Interference avoidance method and device |
| CN107659996B (en) * | 2017-08-30 | 2021-05-18 | 宇龙计算机通信科技(深圳)有限公司 | Channel access method and equipment |
| CN115915474A (en) * | 2021-09-30 | 2023-04-04 | 华为技术有限公司 | Data transmission method, terminal device and system |
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| DE69940301D1 (en) * | 1999-03-15 | 2009-03-05 | Motorola Inc | Time distribution of communication resources in cellular communication systems |
| CN101990231B (en) * | 2009-07-31 | 2014-02-19 | 华为技术有限公司 | Method, system, central node and sensing node for determining idle frequency band |
| KR101367570B1 (en) * | 2009-09-27 | 2014-02-26 | 엘지전자 주식회사 | Method and apparatus of transmitting reference signal in wireless communication system |
| US8509833B2 (en) * | 2010-06-24 | 2013-08-13 | Qualcomm Incorporated | Method and apparatus for using and/or implementing control channels in white space |
| CN101917729B (en) * | 2010-08-13 | 2016-04-13 | 中兴通讯股份有限公司 | A kind of time domain interference indicating means, time-domain resource interference defining method and base station thereof |
| CN103188811B (en) * | 2011-12-31 | 2016-08-10 | 华为技术有限公司 | The transmission method of sub-frame information, subscriber equipment and base station |
| WO2013131267A1 (en) * | 2012-03-08 | 2013-09-12 | 5Renesas Mobile Corporation | Spectrum sensing and cross-carrier scheduling |
| CN103428871B (en) * | 2012-05-25 | 2018-05-18 | 中兴通讯股份有限公司 | A kind of disturbance coordination method and system |
| CN103517283B (en) * | 2012-06-29 | 2016-11-23 | 电信科学技术研究院 | Frequency spectrum sensing method in cognitive radio system and equipment |
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| CN110505708A (en) | 2019-11-26 |
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