CN107864479B - Method and equipment used in UE (user Equipment) and base station for exempting from grant - Google Patents
Method and equipment used in UE (user Equipment) and base station for exempting from grant Download PDFInfo
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Abstract
The invention discloses a method and equipment used in a grant-free UE and a base station. The first air interface resource is selected by the UE. The first resource pool includes K air interface resources, and the first air interface resource is one of the K air interface resources. The first type information comprises G first type sub information and is in one-to-one correspondence with G candidate resource pools. The first type of information is used by the UE to determine the first air interface resource from the G candidate resource pools. The first type of information is dynamically configured. According to the invention, by designing the first type of information, the resource occupation condition related information of the G candidate resource pools is provided for the UE in real time under the condition of no grant, the UE is helped to determine the first air interface resource in the G candidate resource pools, the probability of the transmission collision of the first wireless signal is reduced, and the spectrum efficiency of the system is improved.
Description
Technical Field
The present invention relates to transmission schemes for wireless signals in wireless communication systems, and more particularly, to methods and apparatus used for grant-less wireless transmission.
Background
In a conventional wireless communication system based on a digital modulation scheme, for example, a 3GPP (3rd Generation partnership project) cellular system, uplink wireless signal transmission is scheduled by a base station. According to the conclusion of the 3GPP RAN1(Radio Access Network) #84bis conference, the next generation wireless communication system will study the application of the Autonomous (Autonomous) and/or grant free (grant free) and/or contention based (contentioned based) non-orthogonal multiple Access mode in various NR (New Radio) application scenarios. At least for uplink mtc (large Machine-Type Communications), autonomous/grant-free/contention-based non-orthogonal multiple access needs to be studied.
Non-orthogonal multiple access faces many problems that conventional orthogonal multiple access does not have, such as more severe interference between multiple users, resource collision between multiple users, etc. How to solve these problems, designing an efficient and reliable non-orthogonal multiple access scheme is a direction to be studied.
Disclosure of Invention
The inventor finds out through research that under autonomous/grant-free/contention-based non-orthogonal multiple access, a mechanism needs to be researched to ensure the transmission quality of data, and relevant factors influencing the transmission quality include:
-mechanisms to avoid collision of selected air interface resources between different users;
-DMRS (Demodulation Reference Signal) employed for transmission;
-the MCS (Modulation and Coding Status) used for the transmission;
-the power control mechanism employed;
one way to meet the requirement of ensuring the transmission quality of data is to reserve more resources as much as possible to ensure that the air interface resources selected by different UEs are orthogonal, and to ensure the transmission quality by setting the UE to transmit with higher transmit power and lower MCS. However, an obvious problem is that such a method brings low spectrum efficiency, and when a large number of UEs exist simultaneously in an mtc scenario, such a method is difficult to implement because of the need to reserve too many resources.
The present invention provides a solution to the above problems. 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. For example, embodiments and features in embodiments in the UE of the present application may be applied in a base station and vice versa.
The invention discloses a method used in a grant-free UE, which comprises the following steps:
-step a. receiving information of a first type;
-step b. transmitting a first wireless signal in a first air interface resource.
Wherein the first air interface resource is selected by the UE. The first resource pool includes K air interface resources, and the first air interface resource is one of the K air interface resources. The first type information comprises G first type sub information, and the G first type sub information is in one-to-one correspondence with G candidate resource pools. The first resource pool is one of the G candidate resource pools. The first type of information is used by the UE to determine the first air interface resource from the G candidate resource pools. The first type of information is dynamically configured. The K is a positive integer greater than 1. And G is a positive integer. One of the air interface resources comprises a time frequency resource and a multiple access signature.
As an embodiment, the method has the advantages that the first type of information provides the UE with the resource occupation state information of the G candidate resource pools, and helps the UE to effectively select a resource pool with a low probability of empty resource collision to transmit the first wireless signal, thereby improving transmission performance and transmission efficiency.
As an embodiment, another advantage of the above method is that the base station provides G candidate resource pools for the UE, and the UE can select one air interface resource from the G candidate resource pools for transmitting the first wireless signal, so as to avoid collision due to too few selectable resources.
As an embodiment, the Non-Grant corresponds to an uplink Non-orthogonal (Non-orthogonal) Multiple Access (Multiple Access) of the UE Grant-free.
As an embodiment, the exemption grants uplink non-orthogonal multiple access corresponding to the UE automatic (Autonomous) transmission.
As a sub-embodiment of this embodiment, the automatic transmission refers to that the UE selects uplink resources occupied by transmission by itself.
As an embodiment, the exemption grant corresponds to Contention (Contention based) based uplink non-orthogonal multiple access for the UE.
As an embodiment, the exemption corresponds to the UE not requiring a dynamic and Explicit (Scheduling Grant) Scheduling Grant from the base station when transmitting.
As an embodiment, the grant-free may correspond to multiple UEs sharing the same block of time-frequency resources.
As an embodiment, the Multiple Access Signature (Multiple Access Signature) includes at least one of { sequence, Codebook (Codebook)/Codeword (Codeword), interleaving or mapping pattern (pattern), demodulation reference Signal (demodulation reference Signal), Preamble (Preamble), Spatial-dimension (Spatial-dimension), and Power-dimension (Power-dimension) }.
As an embodiment, an RU (Resource Unit) in the present invention occupies one subcarrier in a frequency domain and occupies a duration of one multicarrier symbol in a time domain.
As an embodiment, the multi-Carrier symbol in the present invention is one of { OFDM (Orthogonal Frequency division Multiplexing) symbol, SC-FDMA (Single-Carrier Frequency division Multiplexing Access) symbol, FBMC (Filter Bank multi-Carrier) symbol, OFDM symbol including CP (Cyclic Prefix), DFT-s-OFDM (Discrete Fourier Transform Spreading Orthogonal Frequency division Multiplexing) symbol including CP }.
As an embodiment, the K air interface resources all occupy the same number of RUs.
As an embodiment, the air interface resource occupies a positive integer number of RUs.
As a sub-embodiment of this embodiment, the positive integer number of RUs is consecutive in both time and frequency domains.
As an embodiment, one of the air interface resources occupies K1 × K2 RUs, where K1 corresponds to the number of modulation symbols generated by information carried on the air interface resource, and K2 is a length of a spreading sequence used by each modulation symbol. The K1 is a positive integer and the K2 is a positive integer greater than 1.
As one embodiment, a first block of bits is used to generate the first wireless signal.
As a sub-embodiment of this embodiment, the first bit block comprises a positive integer number of bits.
As a sub-embodiment of this embodiment, the first bit Block is a Transport Block (TB).
As a sub-embodiment of this embodiment, the first bit block being used to generate the first wireless signal means: the physical Layer data in the first radio signal is output after the first bit block sequentially undergoes channel coding (channelization), Modulation Mapper (Modulation Mapper), Layer Mapper (Layer Mapper), Precoding (Precoding), Resource Element Mapper (Resource Element Mapper), and OFDM signal Generation (Generation).
For one embodiment, the candidate resource pool includes a plurality of time units in a time domain.
As a sub-embodiment of this embodiment, the time unit is a duration of a positive integer number of multicarrier symbols.
As a sub-embodiment of this embodiment, the time unit is the duration of one multicarrier symbol.
As a sub-embodiment of this embodiment, the plurality of time units are discontinuous in the time domain.
As a sub-embodiment of this embodiment, the plurality of time units are consecutive in the time domain.
For one embodiment, the candidate resource pool includes a plurality of frequency units in a frequency domain.
As a sub-embodiment of this embodiment, the frequency unit is a bandwidth occupied by a positive integer number of subcarriers.
As a sub-embodiment of this embodiment, the frequency unit is a bandwidth occupied by one subcarrier.
As a sub-embodiment of this embodiment, the plurality of frequency units are discontinuous in the frequency domain.
As a sub-embodiment of this embodiment, the plurality of frequency units are contiguous in the frequency domain.
As an embodiment, the G candidate resource pools all belong to a first time window. The first time window occupies a positive integer number of multicarrier symbol durations in the time domain.
As an embodiment, the G is equal to 1, and the candidate resource pool is the first resource pool.
As an embodiment, the G first-type sub-information is determined according to measurement results of a sender of the first-type information in G observation resource pools, respectively.
As a sub-embodiment of this embodiment, the G observation resource pools and the G candidate resource pools are in one-to-one correspondence.
As an adjunct to this sub-embodiment, the time domain resources occupied by a given observed resource pool precede the time domain resources occupied by a given candidate resource pool. The given observed resource pool is an observed resource pool corresponding to the given candidate resource pool.
As an adjunct embodiment of this sub-embodiment, the given observed resource pool and the given candidate resource pool occupy the same frequency domain resources. The given observed resource pool is an observed resource pool corresponding to the given candidate resource pool.
As an embodiment, the plurality of air interface resources are mapped to one RU set by a plurality of the multiple access signatures, that is, one RU set is divided into a plurality of the air interface resources in a code division multiplexing manner. The set of RUs includes a positive integer number of RUs.
As an embodiment, at least two of the air interface resources in the candidate resource pool are not orthogonal to each other.
As a sub-embodiment, at least two of the air interface resources in the candidate resource pool occupy the same RU set and are not orthogonal to each other. The set of RUs includes a positive integer number of RUs.
For one embodiment, the first wireless signal includes physical layer data.
As an embodiment, the physical layer channel corresponding to the first wireless signal includes an uplink physical layer data channel (i.e. an uplink channel capable of carrying physical layer data).
As a sub-embodiment, the first wireless signal is transmitted on a PUSCH (Physical Uplink shared channel).
As a sub-embodiment, the first wireless signal is transmitted on a short PUSCH (short PUSCH).
As an embodiment, the transmission channel corresponding to the first wireless signal is an UL-SCH (UpLink shared channel).
As one embodiment, the first wireless signal further includes physical layer signaling.
Specifically, according to an aspect of the present invention, the method is characterized in that the first type sub information includes at least one of:
-load related information;
-occupancy probability related information;
-receiving power related information;
-power compensation related information;
-L air interface resource specific information;
wherein the first type of sub-information is for a given candidate resource pool, the given candidate resource pool being one of the G candidate resource pools. The given candidate resource pool includes L air interface resources. The L pieces of air interface resource specific information are in one-to-one correspondence with the L pieces of air interface resources included in the given candidate resource pool.
As one embodiment, the given candidate resource pool is the first resource pool, and the L is equal to the K.
As a sub-embodiment of this embodiment, the L pieces of air interface resource specific information are used to determine the first air interface resource in the first resource pool.
As an embodiment, at least one of { the load-related information, the occupation probability-related information, the reception power-related information } is used by the UE to determine the first resource pool from the G candidate resource pools.
As an embodiment, the load-related information is used to indicate a percentage of occupied air interface resources in the given candidate resource pool.
As a sub-embodiment of this embodiment, the percentage of the occupied air interface resources is greater than a given threshold, and the UE selects a candidate resource pool other than the given candidate resource pool as the first resource pool. The given threshold is fixed or configured by higher layer signaling.
As an auxiliary embodiment of the sub-embodiment, the sub-embodiment has an advantage of avoiding collision of uplink transmission caused by selecting a candidate resource pool with excessive occupied empty resources by the UE, thereby affecting transmission performance.
As an embodiment, the load-related information is used to indicate a level of occupied air interface resources in the given candidate resource pool.
As a sub-embodiment of this embodiment, the levels are classified into level 1 and level 2, where the level 1 corresponds to the given candidate resource pool being overloaded (more loaded) and the level 2 corresponds to the given candidate resource pool not being overloaded (less loaded).
As an auxiliary embodiment of the sub-embodiment, the level of the occupied air interface resource in the given candidate resource pool is the level 1, and the UE selects a candidate resource pool other than the given candidate resource pool as the first resource pool.
As an example of the auxiliary embodiment, the auxiliary embodiment described above is advantageous in that collision of uplink transmissions by the UE due to selection of a candidate resource pool with a larger load is avoided, and thus transmission performance is not affected.
As an embodiment, the occupation probability related information corresponds to a probability that the UE selects the given candidate resource pool to transmit the first wireless signal.
As an embodiment, the received power related information corresponds to an average power detected by a sender of the first type of information when receiving information transmitted on the given candidate resource pool, and the unit is dBm (decibel).
As a sub-embodiment of this embodiment, the average power indicated by the received power related information is greater than a given threshold, and the UE selects a candidate resource pool other than the given candidate resource pool as the first resource pool. The given threshold is fixed or configured by higher layer signaling.
As an auxiliary embodiment of the sub-embodiment, the sub-embodiment described above has an advantage of avoiding collision of uplink transmissions caused by selecting a candidate resource pool with a larger detected average power by the UE, thereby affecting transmission performance.
As an embodiment, the received power indication information corresponds to a power level of an average power detected when a sender of the first type of information receives information transmitted on the given candidate resource pool.
As a sub-embodiment of this embodiment, the power levels are divided into a power level 1 and a power level 2, where the power level 1 corresponds to a larger average power detected on the given candidate resource pool, and the power level 2 corresponds to a smaller average power detected on the given candidate resource pool.
As an auxiliary embodiment of this sub-embodiment, the power level corresponding to the given candidate resource pool is the power level 1, and the UE selects a candidate resource pool other than the given candidate resource pool as the first resource pool.
As an example of the auxiliary embodiment, the auxiliary embodiment described above is advantageous in that collision of uplink transmissions by the UE due to selection of a candidate resource pool with a larger detected average power level is avoided, and thus transmission performance is not affected.
As an embodiment, the power compensation related information is used for determining the transmission power of the first wireless signal.
As a sub-embodiment of this embodiment, the transmission power of the UE before transmitting the first wireless signal is Pa, and the transmission power of the first wireless signal is Pa + M1. The Pa is in dBm, the M1 is an integer and determined by the power compensation related information, and the M1 is in dB.
As an additional embodiment of this sub-embodiment, said M1 is one of { -4, -3, -1,0,1,3,4 }.
As an additional embodiment of this sub-embodiment, the M1 is equal to N1 × N2, and the N2 is a positive integer and is determined by the power compensation related information.
As an example of this subsidiary embodiment, said N1 is configured by higher layer signalling.
As an example of this subsidiary embodiment, said N1 is one of { -4, -3, -1,0,1,3,4 }.
In one embodiment, the given air interface resource specific information is used to indicate whether a given air interface resource is occupied. The given air interface resource specific information is one of the L air interface resource specific information, and the given air interface resource is an air interface resource corresponding to the given air interface resource specific information.
As a sub-embodiment of this embodiment, the given air interface resource specific information indicates that the given air interface resource is occupied, and the UE selects an air interface resource other than the given air interface resource as the first air interface resource.
As an auxiliary embodiment of the sub-embodiment, the sub-embodiment has an advantage of avoiding transmission collision caused by the UE selecting an occupied air interface resource.
Specifically, according to an aspect of the present invention, the method is characterized in that the step a further includes the steps of:
step A0. receives the second type of information.
Wherein the second type of information is semi-statically configured, the second type of information comprising at least one of { scheduling related information, transmit power related information }. The second type of information is for the G candidate resource pools. The scheduling related information includes at least one of { multiple access signature related information, DMRS related information, MCS }. The transmission power related information includes at least one of { target received power, offset power, power compensation step size, path loss compensation factor, measurement indication }. The transmission power related information is used to determine a transmission power of the first wireless signal.
As an embodiment, the method has the advantages that the existing power configuration information and scheduling information indicating the UE from the base station are indicated to the UE through the second type of information, so as to help the UE to perform transmission mode screening, thereby reducing the complexity of blind detection of the first wireless signal at the base station side and improving the overall performance.
As an embodiment, the second type of information is for the G candidate resource pools.
As an example, the multiple access signature corresponds to a given spreading sequence.
As an embodiment, the multiple access signature related information is used to determine the length of a given spreading sequence employed by information transmitted in the G candidate resource pools.
As an embodiment, the multiple access signature related information is used to determine a target set of spreading sequences. And the spreading sequences adopted by the information transmitted in the G candidate resource pools belong to the target spreading sequence group.
As an embodiment, the DMRS related information indicates at least one of { CS (Cyclic Shift), OCC (Orthogonal Code) } of the DMRS employed by the first radio signal.
As an embodiment, the DMRS related information is used to determine a given sequence for generating a given DMRS. The given DMRS is a DMRS employed by the first wireless signal.
As a sub-implementation of this embodiment, the determining of the given sequence for generating the given DMRS includes { determining a length of the given sequence, determining a generation manner of the given sequence }.
As an embodiment, the transmission power of the first wireless signal is P1And said P is1Determined by the following equation:
P1＝min{PCMAX,PIntialTarget+POffset+(F-1)·PRampingStep+α·PL}
wherein, the PCMAXMaximum transmit power (in dBm) for the UE. The target received power corresponds to PIntialTarget(in dBm), the offset power corresponds to POffset(in dB), the F corresponds to the corresponding transmission times of the first wireless signal on the first air interface resource, and the power compensation step corresponds to PRampingStep(in dB), the path loss compensation factor corresponds to α, the α is a real number not less than 0 and not more than 1, and PL corresponds to a path loss of the UE to a transmitter of the first type of information.
As a sub-embodiment of this embodiment, the transmission power related information does not include the target reception power, and the PIntialTargetIs stationary.
As a sub-embodiment of this embodiment, the transmission power related information does not include the offset power, and the POffsetIs 0.
As a sub-embodiment of this embodiment, the transmission power related information does not include the power compensation step size, and the PRampingStepIs stationary.
As a sub-embodiment of this embodiment, the transmission power related information does not include the path loss compensation factor, and the α is 1.
As an embodiment, the measurement indication is used to determine that the UE employs sub-band path loss measurements.
As a sub-embodiment of this embodiment, the sub-band path loss measurement is that the UE determines the path loss from the sender of the second type of information to the UE only according to the reference signals included in the frequency band occupied by the first resource pool.
As an additional embodiment of this sub-embodiment, the sub-embodiment has the advantage that the path loss determined based on the reference signals included in the frequency band occupied by the first resource pool will be more accurate than the path loss measurement of the wideband, which helps to select a better transmission power for transmitting the first wireless signal.
Specifically, according to an aspect of the present invention, the method is characterized in that the step a further includes the steps of:
-step a10. receiving a first signaling.
Wherein the first signaling is used to determine the G candidate resource pools.
As an embodiment, the G candidate resource pools are discrete in the frequency domain.
The invention discloses a method used in a grant-free base station, which comprises the following steps:
-step a. sending information of a first type;
-step b. receiving a first radio signal in G candidate resource pools.
The first type information comprises G first type sub information, and the G first type sub information is in one-to-one correspondence with the G candidate resource pools. The G candidate resource pools include a first resource pool, where the first resource pool includes K air interface resources, where the K air interface resources include a first air interface resource, and the first wireless signal is transmitted over the first air interface resource. The first type of information is dynamically configured. The K is a positive integer greater than 1. And G is a positive integer. One of the air interface resources comprises a time frequency resource and a multiple access signature.
As an embodiment, the receiving the first wireless signal in the G candidate resource pools means: the base station blindly detects the first wireless signal in G candidate resource pools.
Specifically, according to an aspect of the present invention, the method is characterized in that the first type sub information includes at least one of:
-load related information;
-occupancy probability related information;
-receiving power related information;
-power compensation related information;
-L air interface resource specific information;
wherein the first type of sub-information is for a given candidate resource pool, the given candidate resource pool being one of the G candidate resource pools. The given candidate resource pool includes L air interface resources. The L pieces of air interface resource specific information are in one-to-one correspondence with the L pieces of air interface resources included in the given candidate resource pool.
As an embodiment, at least one of { the load-related information, the occupation probability-related information, the reception power-related information } is used by the base station to determine the first resource pool from the G candidate resource pools.
As an embodiment, the load-related information is used to indicate a percentage of occupied air interface resources in the given candidate resource pool.
As a sub-embodiment of this embodiment, the percentage of the occupied air interface resources is greater than a given threshold, and the base station detects the first wireless signal in a candidate resource pool other than the given candidate resource pool.
As an additional embodiment of the sub-embodiment, the sub-embodiment described above has the advantage of reducing the complexity of blind detection of the first wireless signal by the base station, and improving the system performance.
As an embodiment, the load-related information is used to indicate a level of occupied air interface resources in the given candidate resource pool.
As a sub-embodiment of this embodiment, the levels are classified into level 1 and level 2, where the level 1 corresponds to the given candidate resource pool being overloaded (more loaded) and the level 2 corresponds to the given candidate resource pool not being overloaded (less loaded).
As an auxiliary embodiment of the sub-embodiment, a level of occupied air interface resources in the given candidate resource pool is the level 1, and the base station detects the first wireless signal in a candidate resource pool other than the given candidate resource pool.
As an example of the subsidiary embodiment, the subsidiary embodiment described above is advantageous in that the complexity of blind detection of the first wireless signal by the base station is reduced, and the system performance is improved.
As an embodiment, the received power related information corresponds to an average power detected by the base station when receiving information transmitted on the given candidate resource pool, and the unit is dBm (decibel).
As a sub-embodiment of this embodiment, the average power indicated by the received power-related information is greater than a given threshold, and the base station detects the first wireless signal in a candidate resource pool other than the given candidate resource pool. The given threshold is fixed or configured by higher layer signaling.
As an additional embodiment of the sub-embodiment, the sub-embodiment described above has the advantage of reducing the complexity of blind detection of the first wireless signal by the base station, and improving the system performance.
As an embodiment, the received power indication information corresponds to a power level of an average power detected by the base station when receiving information transmitted on the given candidate resource pool.
As a sub-embodiment of this embodiment, the power levels are divided into a power level 1 and a power level 2, where the power level 1 corresponds to a larger average power detected on the given candidate resource pool, and the power level 2 corresponds to a smaller average power detected on the given candidate resource pool.
As an additional embodiment of this sub-embodiment, the power class corresponding to the given candidate resource pool is the power class 1, and the base station detects the first wireless signal in a candidate resource pool other than the given candidate resource pool.
As an example of the subsidiary embodiment, the subsidiary embodiment described above is advantageous in that the complexity of blind detection of the first wireless signal by the base station is reduced, and the system performance is improved.
In one embodiment, the given air interface resource specific information is used to indicate whether a given air interface resource is occupied. The given air interface resource specific information is one of the L air interface resource specific information, and the given air interface resource is an air interface resource corresponding to the given air interface resource specific information.
As a sub-embodiment of this embodiment, the given air interface resource specific information indicates that the given air interface resource is occupied, and the base station detects the first wireless signal in air interface resources other than the given air interface resource.
As an additional embodiment of the sub-embodiment, the sub-embodiment described above has the advantage of reducing the complexity of blind detection of the first wireless signal by the base station, and improving the system performance.
Specifically, according to an aspect of the present invention, the method is characterized in that the step a further includes the steps of:
step A0. sends the second type of information.
Wherein the second type of information is semi-statically configured, the second type of information comprising at least one of { scheduling related information, transmit power related information }. The second type of information is for the G candidate resource pools. The scheduling related information includes at least one of { multiple access signature related information, DMRS related information, MCS }. The transmission power related information includes at least one of { target received power, offset power, power compensation step size, path loss compensation factor, measurement indication }. The transmission power related information is used to determine a transmission power of the first wireless signal.
As an embodiment, the base station detects and receives the first wireless signal in the G candidate resource pools according to the second type of information.
Specifically, according to an aspect of the present invention, the method is characterized in that the step a further includes the steps of:
-step a10. sending a first signaling.
Wherein the first signaling is used to determine the G candidate resource pools.
The invention discloses a user equipment used for free grant, which comprises the following modules:
-a first receiving module: for receiving information of a first type;
-a first sending module: for transmitting a first wireless signal in a first air interface resource.
Wherein the first air interface resource is selected by the UE. The first resource pool includes K air interface resources, and the first air interface resource is one of the K air interface resources. The first type information comprises G first type sub information, and the G first type sub information is in one-to-one correspondence with G candidate resource pools. The first resource pool is one of the G candidate resource pools. The first type of information is used by the UE to determine the first air interface resource from the G candidate resource pools. The first type of information is dynamically configured. The K is a positive integer greater than 1. And G is a positive integer. One of the air interface resources comprises a time frequency resource and a multiple access signature.
For an embodiment, the first receiving module is further configured to receive a second type of information. The second type of information is semi-statically configured, and the second type of information includes at least one of { scheduling related information, transmit power related information }. The second type of information is for the G candidate resource pools. The scheduling related information includes at least one of { multiple access signature related information, DMRS related information, MCS }. The transmission power related information includes at least one of { target received power, offset power, power compensation step size, path loss compensation factor, measurement indication }. The transmission power related information is used to determine a transmission power of the first wireless signal.
As an embodiment, the first receiving module is further configured to receive a first signaling. The first signaling is used to determine the G candidate resource pools.
Specifically, according to an aspect of the present invention, the apparatus is characterized in that the first type sub information includes at least one of:
-load related information;
-occupancy probability related information;
-receiving power related information;
-power compensation related information;
-L air interface resource specific information;
wherein the first type of sub-information is for a given candidate resource pool, the given candidate resource pool being one of the G candidate resource pools. The given candidate resource pool includes L air interface resources. The L pieces of air interface resource specific information are in one-to-one correspondence with the L pieces of air interface resources included in the given candidate resource pool.
The invention discloses base station equipment used for free grant, which comprises the following modules:
-a second sending module: for transmitting a first type of information;
-a second receiving module: for receiving a first wireless signal in G candidate resource pools.
The first type information comprises G first type sub information, and the G first type sub information is in one-to-one correspondence with the G candidate resource pools. The G candidate resource pools include a first resource pool, where the first resource pool includes K air interface resources, where the K air interface resources include a first air interface resource, and the first wireless signal is transmitted over the first air interface resource. The first type of information is dynamically configured. The K is a positive integer greater than 1. And G is a positive integer. One of the air interface resources comprises a time frequency resource and a multiple access signature.
As an embodiment, the second sending module is further configured to send the second type of information. The second type of information is semi-statically configured, and the second type of information includes at least one of { scheduling related information, transmit power related information }. The second type of information is for the G candidate resource pools. The scheduling related information includes at least one of { multiple access signature related information, DMRS related information, MCS }. The transmission power related information includes at least one of { target received power, offset power, power compensation step size, path loss compensation factor, measurement indication }. The transmission power related information is used to determine a transmission power of the first wireless signal.
As an embodiment, the second sending module is further configured to send the first signaling. The first signaling is used to determine the G candidate resource pools.
Specifically, according to an aspect of the present invention, the apparatus is characterized in that the first type sub information includes at least one of:
-load related information;
-occupancy probability related information;
-receiving power related information;
-power compensation related information;
-L air interface resource specific information;
wherein the first type of sub-information is for a given candidate resource pool, the given candidate resource pool being one of the G candidate resource pools. The given candidate resource pool includes L air interface resources. The L pieces of air interface resource specific information are in one-to-one correspondence with the L pieces of air interface resources included in the given candidate resource pool.
Compared with the prior art, the invention has the following technical advantages:
by designing the first type of information, resource occupation condition related information of the G candidate resource pools is provided for the UE in real time under the grant-free condition, so as to help the UE determine the first air interface resource in the G candidate resource pools, reduce the probability of transmission collision, and improve the system spectrum efficiency.
And controlling scheduling related information and transmission power related information adopted in the G candidate resource pools by designing the second type of information, so as to reduce the complexity of blind detection of the first wireless signal at the base station side.
Through designing the first signaling, G candidate resource pools are provided for the UE, so as to ensure flexibility of selecting the air interface resources under the condition of uplink transmission grant-free.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a flow diagram of a first wireless signal transmission according to an embodiment of the invention;
FIG. 2 is a diagram illustrating resource mapping of a candidate resource pool in the time-frequency domain according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating resource mapping of air interface resources according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the relationship of an observed resource pool and a corresponding candidate resource pool in accordance with the present invention;
fig. 5 shows a block diagram of a processing device in a UE according to an embodiment of the invention;
fig. 6 shows a block diagram of a processing means in a base station according to an embodiment of the invention;
Detailed Description
The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.
Example 1
For theBase station N1First signaling is transmitted in step S10, second type information is transmitted in step S11, first type information is transmitted in step S12, and first wireless signals are received in G candidate resource pools in step S13.
For theUE U2The first signaling is received in step S20, the second type information is received in step S21, the first type information is received in step S22, and the first wireless signal is transmitted in the first air interface resource in step S23.
As a sub-embodiment, the first signaling is Cell-specific (Cell-specific).
As a sub-embodiment, the second type of information is cell-specific.
As a sub-embodiment, the first type of information is cell-specific.
As a sub-embodiment, the first signaling is specific to a TRP (Transmission Reception Point).
As a sub-embodiment, the second type of information is TRP specific.
As a sub-embodiment, the first type of information is TRP specific.
As an auxiliary embodiment of the above three sub-embodiments, the TRP is one TRP included in the base station N1.
Example 2
As a sub-embodiment, the number of RUs occupied by one time-frequency resource is equal to the number of RUs occupied by one air interface resource in the present invention.
As a sub-embodiment, one of the time-frequency resources includes Q1 air interface resources, and Q1 is a positive integer greater than 1.
As an additional embodiment of the sub-embodiment, one of the candidate resource pools includes Q × Q1 air interface resources.
As a sub-embodiment, a UE only occupies one of the air interface resources for one transmission in the candidate resource pool.
Example 3
Embodiment 3 illustrates a schematic diagram of resource mapping of an air interface resource according to the present invention. As shown in fig. 3, K air interface resources shown in the figure belong to a given time-frequency resource, the given time-frequency resource belongs to a given candidate resource pool, and the given candidate resource pool is one of the G candidate resource pools described in the present invention.
As a sub-embodiment, the K is equal to the Q1 in embodiment 2.
Example 4
Embodiment 4 illustrates a schematic diagram of a relationship between an observed resource pool and a corresponding candidate resource pool according to the present invention. As shown in fig. 4, a rectangular frame marked by oblique lines in the drawing represents the observation resource pool, and a rectangular frame marked by squares represents a candidate resource pool corresponding to the observation resource pool.
As a sub-embodiment, the duration of the observed resource pool in the time domain is longer than the duration of the corresponding candidate resource pool in the time domain.
As a sub-embodiment, the duration of the observed resource pool in the time domain is equal to the duration of the corresponding candidate resource pool in the time domain.
As a sub-embodiment, the observed resource pool and the corresponding candidate resource pool are contiguous in time domain.
As a sub-embodiment, the observed resource pool and the corresponding candidate resource pool belong to the same resource pool set.
Example 5
Embodiment 5 illustrates a block diagram of a processing device in a UE, as shown in fig. 5. In fig. 5, the UE processing apparatus 100 mainly comprises a first receiving module 101 and a first sending module 102.
The first receiving module 101: for receiving information of a first type;
the first sending module 102: for transmitting a first wireless signal in a first air interface resource.
In embodiment 5, the first air interface resource is selected by the UE. The first resource pool includes K air interface resources, and the first air interface resource is one of the K air interface resources. The first type information comprises G first type sub information, and the G first type sub information is in one-to-one correspondence with G candidate resource pools. The first resource pool is one of the G candidate resource pools. The first type of information is used by the UE to determine the first air interface resource from the G candidate resource pools. The first type of information is dynamically configured. The K is a positive integer greater than 1. And G is a positive integer. One of the air interface resources comprises a time frequency resource and a multiple access signature.
As a sub embodiment, the first receiving module 101 is further configured to receive the second type of information. The second type of information is semi-statically configured, and the second type of information includes at least one of { scheduling related information, transmit power related information }. The second type of information is for the G candidate resource pools. The scheduling related information includes at least one of { multiple access signature related information, DMRS related information, MCS }. The transmission power related information includes at least one of { target received power, offset power, power compensation step size, path loss compensation factor, measurement indication }. The transmission power related information is used to determine a transmission power of the first wireless signal.
As a sub embodiment, the first receiving module 101 is further configured to receive a first signaling. The first signaling is used to determine the G candidate resource pools.
Example 6
Embodiment 6 is a block diagram illustrating a processing apparatus in a base station device, as shown in fig. 6. In fig. 6, the base station device processing apparatus 200 mainly comprises a second sending module 201 and a second receiving module 202.
The second sending module 201: for transmitting a first type of information;
the second receiving module 202: for receiving a first wireless signal in G candidate resource pools.
In embodiment 6, the first type information includes G pieces of first type sub information, and the G pieces of first type sub information correspond to the G candidate resource pools one to one. The G candidate resource pools include a first resource pool, where the first resource pool includes K air interface resources, where the K air interface resources include a first air interface resource, and the first wireless signal is transmitted over the first air interface resource. The first type of information is dynamically configured. The K is a positive integer greater than 1. And G is a positive integer. One of the air interface resources comprises a time frequency resource and a multiple access signature.
As a sub embodiment, the second sending module 201 is further configured to send the second type of information. The second type of information is semi-statically configured, and the second type of information includes at least one of { scheduling related information, transmit power related information }. The second type of information is for the G candidate resource pools. The scheduling related information includes at least one of { multiple access signature related information, DMRS related information, MCS }. The transmission power related information includes at least one of { target received power, offset power, power compensation step size, path loss compensation factor, measurement indication }. The transmission power related information is used to determine a transmission power of the first wireless signal.
As a sub embodiment, the second sending module 201 is further configured to send the first signaling. The first signaling is used to determine the G candidate resource pools.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE and the terminal in the present invention include, but are not limited to, a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted Communication device, a wireless sensor, a network card, an internet of things terminal, an RFID terminal, an NB-IOT terminal, an MTC (Machine Type Communication) terminal, an eMTC (enhanced MTC) terminal, a data card, a network card, a vehicle-mounted Communication device, a low-cost mobile phone, a low-cost tablet computer, and other wireless Communication devices. The base station in the present invention includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (8)
1. A method used in a grant-free UE, comprising the steps of:
-step a. receiving information of a first type;
-step b. transmitting a first wireless signal in a first air interface resource;
wherein the first air interface resource is selected by the UE; the first resource pool comprises K air interface resources, and the first air interface resource is one of the K air interface resources; the first type information comprises G first type sub information, and the G first type sub information is in one-to-one correspondence with G candidate resource pools; the first resource pool is one of the G candidate resource pools; the first type of information is used by the UE to determine the first air interface resource from the G candidate resource pools; the first type of information is dynamically configured; k is a positive integer greater than 1; g is a positive integer; one of the air interface resources comprises a time frequency resource and a multiple access signature; the first type of sub-information comprises at least one of:
-load related information;
-occupancy probability related information;
-receiving power related information;
-power compensation related information;
-L air interface resource specific information;
the first class of sub-information is for a given candidate resource pool, the given candidate resource pool being one of the G candidate resource pools; the given candidate resource pool comprises L air interface resources; the L pieces of air interface resource specific information are in one-to-one correspondence with the L pieces of air interface resources included in the given candidate resource pool.
2. The method of claim 1, wherein the UE further performs the following steps before performing step a:
-step A0. receiving the second type of information;
wherein the second type of information is semi-statically configured, the second type of information including at least one of scheduling related information or transmit power related information; the second type of information is for the G candidate resource pools; the scheduling related information comprises at least one of multiple access signature related information, DMRS related information or MCS; the transmission power related information comprises at least one of target receiving power, offset power, power compensation step size, path loss compensation factor or measurement indication; the transmission power related information is used to determine a transmission power of the first wireless signal.
3. The method according to claim 2, wherein the UE further performs the following steps before performing step a 0:
-a step a10. receiving a first signaling;
wherein the first signaling is used to determine the G candidate resource pools.
4. A method used in a base station that is exempt from grant, comprising the steps of:
-step a. sending information of a first type;
-step b. receiving a first radio signal in G candidate resource pools;
the first type information comprises G pieces of first type sub information, and the G pieces of first type sub information correspond to the G candidate resource pools one by one; the G candidate resource pools include a first resource pool, where the first resource pool includes K air interface resources, where the K air interface resources include a first air interface resource, and the first wireless signal is transmitted over the first air interface resource; the first type of information is dynamically configured; k is a positive integer greater than 1; g is a positive integer; one of the air interface resources comprises a time frequency resource and a multiple access signature; the first type of sub-information comprises at least one of:
-load related information;
-occupancy probability related information;
-receiving power related information;
-power compensation related information;
-L air interface resource specific information;
the first class of sub-information is for a given candidate resource pool, the given candidate resource pool being one of the G candidate resource pools; the given candidate resource pool comprises L air interface resources; the L pieces of air interface resource specific information are in one-to-one correspondence with the L pieces of air interface resources included in the given candidate resource pool.
5. The method of claim 4, wherein the base station further performs the following steps before performing step A:
step A0. sending the second type of information;
wherein the second type of information is semi-statically configured, the second type of information including at least one of scheduling related information or transmit power related information; the second type of information is for the G candidate resource pools; the scheduling related information comprises at least one of multiple access signature related information, DMRS related information or MCS; the transmission power related information comprises at least one of target receiving power, offset power, power compensation step size, path loss compensation factor or measurement indication; the transmission power related information is used to determine a transmission power of the first wireless signal.
6. The method according to claim 5, wherein said base station further performs the following steps before performing said step A0:
-a step a10. sending a first signaling;
wherein the first signaling is used to determine the G candidate resource pools.
7. A user equipment configured for grantless provisioning, comprising:
-a first receiving module for receiving information of a first type;
-a first transmitting module for transmitting a first wireless signal in a first air interface resource;
wherein the first air interface resource is selected by the user equipment; the first resource pool comprises K air interface resources, and the first air interface resource is one of the K air interface resources; the first type information comprises G first type sub information, and the G first type sub information is in one-to-one correspondence with G candidate resource pools; the first resource pool is one of the G candidate resource pools; the first type of information is used by the user equipment to determine the first air interface resource from the G candidate resource pools; the first type of information is dynamically configured; k is a positive integer greater than 1; g is a positive integer; one of the air interface resources comprises a time frequency resource and a multiple access signature; the first type of sub-information comprises at least one of:
-load related information;
-occupancy probability related information;
-receiving power related information;
-power compensation related information;
-L air interface resource specific information;
the first class of sub-information is for a given candidate resource pool, the given candidate resource pool being one of the G candidate resource pools; the given candidate resource pool comprises L air interface resources; the L pieces of air interface resource specific information are in one-to-one correspondence with the L pieces of air interface resources included in the given candidate resource pool.
8. A base station device used for grant-free, comprising:
-a second sending module for sending information of the first type;
-a second receiving module for receiving a first radio signal in G candidate resource pools;
the first type information comprises G pieces of first type sub information, and the G pieces of first type sub information correspond to the G candidate resource pools one by one; the G candidate resource pools include a first resource pool, where the first resource pool includes K air interface resources, where the K air interface resources include a first air interface resource, and the first wireless signal is transmitted over the first air interface resource; the first type of information is dynamically configured; k is a positive integer greater than 1; g is a positive integer; one of the air interface resources comprises a time frequency resource and a multiple access signature; the first type of sub-information comprises at least one of:
-load related information;
-occupancy probability related information;
-receiving power related information;
-power compensation related information;
-L air interface resource specific information;
the first class of sub-information is for a given candidate resource pool, the given candidate resource pool being one of the G candidate resource pools; the given candidate resource pool comprises L air interface resources; the L pieces of air interface resource specific information are in one-to-one correspondence with the L pieces of air interface resources included in the given candidate resource pool.
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| CN110350956B (en) * | 2018-04-08 | 2021-12-24 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
| CN110719152A (en) * | 2018-07-11 | 2020-01-21 | 电信科学技术研究院有限公司 | Uplink sending method and sending end |
| CN108923890B (en) * | 2018-07-17 | 2021-06-29 | 武汉虹信科技发展有限责任公司 | Data transmission method, user equipment, base station and system |
| CN109151756B (en) * | 2018-09-13 | 2021-05-07 | 泉州市华祥工业设计有限公司 | Mobile networked water pollution environment-friendly monitoring method and system with enhanced flexibility |
| WO2020062051A1 (en) * | 2018-09-28 | 2020-04-02 | 株式会社Ntt都科摩 | Method and device for uplink power control |
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| CN107846707A (en) * | 2016-09-18 | 2018-03-27 | 上海朗帛通信技术有限公司 | A kind of method and apparatus in the UE for exempting to authorize, base station |
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