CN111130743B - Method and device in wireless communication - Google Patents
Method and device in wireless communication Download PDFInfo
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- CN111130743B CN111130743B CN201911392050.8A CN201911392050A CN111130743B CN 111130743 B CN111130743 B CN 111130743B CN 201911392050 A CN201911392050 A CN 201911392050A CN 111130743 B CN111130743 B CN 111130743B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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Abstract
The invention discloses a method and a device in wireless communication. The UE firstly receives a first wireless signal; a second wireless signal is then received. Wherein a first block of bits is used to generate the first wireless signal and the second wireless signal. The time interval between the ending time of the receiving time window of the first wireless signal and the starting time of the receiving time window of the second wireless signal is less than the duration of 1 OFDM symbol. A receive time window of the first wireless signal precedes a receive time window of the second wireless signal. The first wireless signal adopts a first modulation coding mode, and the first wireless signal adopts a second modulation coding mode. And the transmission efficiency corresponding to the second modulation coding mode is lower than that corresponding to the first modulation coding mode. The invention can avoid the reduction of TDD transmission efficiency caused by excessive GP configuration.
Description
The present application is a divisional application of the following original applications:
application date of the original application: 2016 (8 months) and 22 days
- -application number of the original application: 201610704077.6
The invention of the original application is named: method and device in wireless communication
Technical Field
The present invention relates to a transmission scheme in a wireless communication system, and more particularly, to a method and apparatus for Time Division Duplex (TDD).
Background
For TDD transmission, a GP (Guard Period) is generally configured between a time resource reserved for downlink transmission and a transmission resource reserved for uplink transmission, and the GP is used for overcoming interference of an uplink wireless signal to a downlink wireless signal.
One important application of the Latency Reduction (LR) topic in 3GPP (3rd Generation Partner Project) Release 14 is low-Latency communication. With respect to the requirement of reducing the delay, the subframe structure of the conventional LTE needs to be redesigned, and a system design based on short Transport Time Interval (sTTI) is being discussed.
For TDD low latency communication, more switching points from downlink to uplink need to be allocated, and further more GPs needs to be set, and too many GPs will cause reduction of transmission efficiency.
In order to solve the above problem, a UE (User Equipment) -specific GP length is proposed, and an appropriate GP length is configured for each UE according to a distance from the UE to a cell center.
Disclosure of Invention
The inventor finds through research that the scheme of UE-specific GP length depends on the precise positioning of the UE, and thus robustness is a potential problem. Furthermore, the method can only partially reduce the length of GP, and the performance needs to be further optimized.
The present invention provides a solution to the problem of reduced transmission efficiency due to the excessive use of GP. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE of the present application may be applied to the base station, and vice versa. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
The invention discloses a method used in UE of time division duplex, which comprises the following steps:
-step a. receiving a first wireless signal;
-step b.
Wherein a first block of bits is used to generate the first wireless signal and the second wireless signal. A reception time window of the first wireless signal and a reception time window of the second wireless signal are consecutive; or the time interval from the ending time of the receiving time window of the first wireless signal to the starting time of the receiving time window of the second wireless signal does not exceed the duration of 1 OFDM symbol. A receive time window of the first wireless signal precedes a receive time window of the second wireless signal. The first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode. The transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the first modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the first wireless signal. The transmission mode comprises at least one of { transmitting antenna port, mapping mode to time-frequency resource }.
As an embodiment, the UE is not interfered by an uplink signal from a terminal of the local cell in a receiving time window of the first wireless signal, and the UE is interfered by an uplink signal from a terminal of the local cell in a receiving time window of the second wireless signal.
In the above embodiment, the base station transmits the downlink signal in the GP, so that the transmission efficiency is improved. Furthermore, the base station allocates different modulation and coding modes for the wireless signal of the same bit Block, so that the increase of Block Error Rate (BLER) caused by uplink interference is avoided, and Robustness is improved.
As an embodiment, the Modulation and Coding scheme is MCS (Modulation and Coding Status).
As an embodiment, the modulation and Coding scheme indicates a modulation scheme and a Coding Rate (Coding Rate) adopted by the corresponding wireless signal.
In an embodiment, the coding rate corresponding to the first modulation and coding scheme is equal to the coding rate corresponding to the second modulation and coding scheme, and an order of the modulation scheme corresponding to the first modulation and coding scheme is higher than an order of the modulation scheme corresponding to the second modulation and coding scheme.
As an embodiment, the transmission CHannel corresponding to the first bit block is a DL-SCH (DownLink Shared CHannel).
As an embodiment, the first wireless signal is transmitted on a PDSCH (Physical Downlink Shared CHannel).
As one embodiment, the second wireless signal is transmitted on a PDSCH.
As an embodiment, the first wireless signal is transmitted on a short physical downlink shared channel (sPDSCH).
As an embodiment, said second radio signal is transmitted on the sPDSCH.
As an embodiment, the transmission Channel corresponding to the second wireless signal is an MCH (Multicast Channel).
As an embodiment, the first bit Block is a Transport Block (TB).
For one embodiment, the first bit Block includes a plurality of TBs (Transport blocks).
As an embodiment, the first bit block is Channel coded (Channel Coding) to generate a second bit block, and the second bit block is divided into a third bit block and a fourth bit block. The first radio signal is an output of the third bit block after sequentially passing through a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and an OFDM signal Generation (Generation). The second wireless signal is an output of the fourth bit block after sequentially passing through a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and an OFDM signal Generation (Generation).
As a sub-embodiment of the above embodiment, the layer to which the third bit block is mapped and the layer to which the fourth bit block is mapped are different.
As a sub-embodiment of the foregoing embodiment, a precoding matrix corresponding to the third bit block is different from a precoding matrix corresponding to the fourth bit block.
As a sub-embodiment of the above-mentioned embodiments, a mapping method of the first radio signal to the RE and a mapping method of the second radio signal to the RE are different.
As one embodiment, the first bit block includes a first sub-bit block and a second sub-bit block. The first radio signal is an output of the first sub-bit block after sequentially passing through a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and an OFDM signal Generation (Generation). The second wireless signal is an output of the second sub-bit block after sequentially passing through a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and an OFDM signal Generation (Generation).
As a sub-embodiment of the above embodiment, the layer to which the first sub-block of bits is mapped and the layer to which the second sub-block of bits is mapped are different.
As a sub-embodiment of the foregoing embodiment, a precoding matrix corresponding to the first sub-bit block is different from a precoding matrix corresponding to the second sub-bit block.
As a sub-embodiment of the above-mentioned embodiments, a mapping method of the first radio signal to the RE and a mapping method of the second radio signal to the RE are different.
Specifically, according to an aspect of the present invention, the first wireless signal and the second wireless signal are respectively transmitted by a first antenna port set and a second antenna port set, and the first antenna port set and the second antenna port set respectively include a positive integer number of antenna ports. The first set of antenna ports and the second set of antenna ports are different.
As an embodiment, one of the antenna ports transmits one RS (Reference Signal) port. As a sub-embodiment of this embodiment, RS ports transmitted by different antenna ports are orthogonal.
As an embodiment, the first set of antenna ports is UE specific and the second set of antenna ports is cell common.
As an embodiment, the first set of antenna ports is UE specific and the second set of antenna ports is cell common.
As one embodiment, the first set of antenna ports is dynamically configured.
As an embodiment, the second set of antenna ports is configured by higher layer signaling.
In one embodiment, the first radio signal is transmitted by using a beamforming method, and the second radio signal is transmitted by using a transmission diversity method.
In the above embodiment, the time-frequency resource occupied by the second radio signal may be used by multiple (rather than one) terminals to transmit uplink signals, and BLER is reduced by interference randomization.
Specifically, according to an aspect of the present invention, the first wireless signal and the second wireless signal occupy a first RU (Resource Unit) set and a second RU set, respectively. The first and second sets of RUs each include a positive integer number of RUs that occupy a duration of one OFDM (Orthogonal Frequency Division Multiplexing) symbol in a time domain and that occupy one subcarrier in a Frequency domain. The bandwidth occupied by the first set of RUs is different from the bandwidth occupied by the second set of RUs.
As an embodiment, the time-frequency resource occupied by the second wireless signal may be used by multiple (rather than one) terminals to transmit uplink signals, so as to avoid receiving severe interference from one terminal.
As an embodiment, the RU is RE (Resource Element).
As one embodiment, there are at least two RUs, which have different corresponding subcarrier spacings.
As an embodiment, the first set of RUs is Localized (Localized) in the frequency domain and the second set of RUs is Distributed (Distributed) in the frequency domain.
As an example, the bandwidth occupied by a given set of RUs refers to: bandwidth between an RU in a given set of RUs that occupies the highest frequency point and an RU in the given set that occupies the lowest frequency point.
In particular, according to one aspect of the invention, it is characterized in that the first time interval is reserved for upstream transmission. The first time interval and a reception time window of the second wireless signal overlap. The receiver corresponding to the uplink transmission is the transmitter of the second wireless signal. The frequency domain resource occupied by the uplink transmission and the frequency domain resource occupied by the first wireless signal belong to the same system bandwidth.
As one embodiment, the sender of the second wireless signal is the sender of the first wireless signal.
As an embodiment, the frequency domain resource occupied by the uplink transmission and the frequency domain resource occupied by the first wireless signal belong to the same carrier.
As one example, the system bandwidth does not exceed 1000MHz (megahertz).
As one example, the system bandwidth does not exceed 100MHz (megahertz).
As an embodiment, the system bandwidth corresponds to one carrier.
As an embodiment, the first time interval reserved for uplink transmission means: the first time interval belongs to a second half of a time domain resource configured as a GP.
As an embodiment, the first time interval reserved for uplink transmission means: and the sender scheduling terminal of the second wireless signal sends an uplink signal at a first time interval.
As an embodiment, the first time interval reserved for uplink transmission means: the terminal scheduled by the sender of the second wireless signal transmits an uplink signal over a first time interval.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
step A0. receives the first information.
Wherein the first information is carried by physical layer signaling, and the first information is used to determine { the first modulation and coding scheme, the second modulation and coding scheme }.
As an embodiment, the physical layer signaling is DCI (Downlink Control Information).
As an embodiment, the physical layer signaling is DCI for Downlink Grant (Downlink Grant).
As an embodiment, the first information indicates the first modulation and coding scheme, and the second modulation and coding scheme is associated with the first modulation and coding scheme.
As a sub-implementation of the foregoing embodiment, the index corresponding to the first modulation and coding scheme is equal to the index corresponding to the second modulation and coding scheme plus a target offset, and the target offset is configurable or fixed.
The sub-embodiment can save the downlink signaling overhead and improve the transmission efficiency.
As an embodiment, the physical layer signaling is further used to determine the first and second sets of RUs.
As an embodiment, a reception time window of the physical layer signaling precedes a reception time window of the second wireless signal.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
-a step a1. receiving second information.
Wherein the second information is used to determine at least one of { an end time of a reception time window of the first wireless signal, an end time of a reception time window of the second wireless signal }.
As an embodiment, the second information is carried by higher layer signaling.
As an embodiment, the first information and the second information are carried by the same physical layer signaling.
The above embodiments enable the base station to dynamically adjust the time interval for downlink transmission in the GP to balance transmission efficiency and interference avoidance.
The invention discloses a method used in a time division duplex base station, which comprises the following steps:
-step a. transmitting a first wireless signal;
-step b.
Wherein a first block of bits is used to generate the first wireless signal and the second wireless signal. The transmission time window of the first wireless signal and the transmission time window of the second wireless signal are consecutive; or the time interval between the ending time of the transmission time window of the first wireless signal and the starting time of the transmission time window of the second wireless signal does not exceed the duration of 1 OFDM symbol. The transmission time window of the first wireless signal precedes the transmission time window of the second wireless signal. The first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode. The transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the first modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the first wireless signal. The transmission mode comprises at least one of { transmitting antenna port, mapping mode to time-frequency resource }.
Specifically, according to an aspect of the present invention, the first wireless signal and the second wireless signal are respectively transmitted by a first antenna port set and a second antenna port set, and the first antenna port set and the second antenna port set respectively include a positive integer number of antenna ports. The first set of antenna ports and the second set of antenna ports are different.
In particular, according to one aspect of the invention, the first wireless signal and the second wireless signal occupy a first set of RUs and a second set of RUs, respectively. The first and second sets of RUs each include a positive integer number of RUs that occupy the duration of one OFDM symbol in the time domain and one subcarrier in the frequency domain. The bandwidth occupied by the first set of RUs is different from the bandwidth occupied by the second set of RUs.
In particular, according to one aspect of the invention, it is characterized in that the first time interval is reserved for upstream transmission. The first time interval and a reception time window of the second wireless signal overlap. The receiver corresponding to the uplink transmission is the transmitter of the second wireless signal. The frequency domain resource occupied by the uplink transmission and the frequency domain resource occupied by the first wireless signal belong to the same system bandwidth.
Specifically, according to one aspect of the present invention, the step a further includes the steps of:
step A0. sending the first information.
Wherein the first information is carried by physical layer signaling, and the first information is used to determine { the first modulation and coding scheme, the second modulation and coding scheme }.
Specifically, according to an aspect of the present invention, the step a further includes the steps of:
-a step a1. sending the second information.
Wherein the second information is used to determine at least one of { an end time of a reception time window of the first wireless signal, an end time of a reception time window of the second wireless signal }.
The invention discloses a user equipment used for dynamic scheduling, which comprises the following modules:
a first receiving module: for receiving a first wireless signal;
a second receiving module: for receiving the second wireless signal.
Wherein a first block of bits is used to generate the first wireless signal and the second wireless signal. A reception time window of the first wireless signal and a reception time window of the second wireless signal are consecutive; or the time interval between the ending time of the receiving time window of the first wireless signal and the starting time of the receiving time window of the second wireless signal does not exceed the duration of 1 OFDM symbol. A receive time window of the first wireless signal precedes a receive time window of the second wireless signal. The first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode. The transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the first modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the first wireless signal. The transmission mode comprises at least one of { transmitting antenna port, mapping mode to time-frequency resource }.
As an embodiment, the above user equipment is characterized in that the first wireless signal and the second wireless signal are respectively transmitted by a first antenna port set and a second antenna port set, and the first antenna port set and the second antenna port set respectively include a positive integer number of antenna ports. The first set of antenna ports and the second set of antenna ports are different.
As an embodiment, the user equipment as described above is characterized in that the first wireless signal and the second wireless signal occupy a first RU set and a second RU set, respectively. The first and second sets of RUs each include a positive integer number of RUs that occupy the duration of one OFDM symbol in the time domain and one subcarrier in the frequency domain. The bandwidth occupied by the first set of RUs is different from the bandwidth occupied by the second set of RUs.
As an embodiment, the user equipment is characterized in that the first time interval is reserved for uplink transmission. The first time interval and a reception time window of the second wireless signal overlap. The receiver corresponding to the uplink transmission is the transmitter of the second wireless signal. The frequency domain resource occupied by the uplink transmission and the frequency domain resource occupied by the first wireless signal belong to the same system bandwidth.
As an embodiment, the above user equipment is characterized in that the first receiving module is further configured to receive first information. Wherein the first information is carried by physical layer signaling, and the first information is used to determine { the first modulation and coding scheme, the second modulation and coding scheme }.
As an embodiment, the above user equipment is characterized in that the first receiving module is further configured to receive second information. Wherein the second information is used to determine at least one of { an end time of a reception time window of the first wireless signal, an end time of a reception time window of the second wireless signal }.
The invention discloses a base station device used for dynamic scheduling, which comprises the following modules:
a first sending module: the first wireless signal is used for sending and receiving;
a second sending module: for transmitting the second wireless signal.
Wherein a first block of bits is used to generate the first wireless signal and the second wireless signal. The transmission time window of the first wireless signal and the transmission time window of the second wireless signal are consecutive; or the time interval between the ending time of the transmission time window of the first wireless signal and the starting time of the transmission time window of the second wireless signal does not exceed the duration of 1 OFDM symbol. The transmission time window of the first wireless signal precedes the transmission time window of the second wireless signal. The first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode. The transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the first modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the first wireless signal. The transmission mode comprises at least one of { transmitting antenna port, mapping mode to time-frequency resource }.
As an embodiment, the base station device is characterized in that the first wireless signal and the second wireless signal are respectively transmitted by a first antenna port set and a second antenna port set, and the first antenna port set and the second antenna port set respectively include a positive integer number of antenna ports. The first set of antenna ports and the second set of antenna ports are different.
As an embodiment, the above base station apparatus is characterized in that the first wireless signal and the second wireless signal occupy a first RU set and a second RU set, respectively. The first and second sets of RUs each include a positive integer number of RUs that occupy a duration of one OFDM symbol in the time domain and one subcarrier in the frequency domain. The bandwidth occupied by the first set of RUs is different from the bandwidth occupied by the second set of RUs.
As an embodiment, the base station apparatus is characterized in that the first time interval is reserved for uplink transmission. The first time interval and a reception time window of the second wireless signal overlap. And the receiver corresponding to the uplink transmission is the base station. The frequency domain resource occupied by the uplink transmission and the frequency domain resource occupied by the first wireless signal belong to the same system bandwidth.
As an embodiment, the base station device is characterized in that the first sending module is further configured to send the first information. Wherein the first information is carried by physical layer signaling, and the first information is used to determine { the first modulation and coding scheme, the second modulation and coding scheme }.
As an embodiment, the base station device is characterized in that the first sending module is further configured to send second information. Wherein the second information is used to determine at least one of { an end time of a reception time window of the first wireless signal, an end time of a reception time window of the second wireless signal }.
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 downstream transmission according to an embodiment of the invention;
FIG. 2 illustrates a timing diagram of a first wireless signal and a second wireless signal according to one embodiment of the invention;
fig. 3 shows a schematic diagram of a downlink/uplink switching point at the base station side according to an embodiment of the invention;
fig. 4 is a schematic diagram illustrating time-frequency resources occupied by a first wireless signal and a second wireless signal according to an embodiment of 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
Embodiment 1 illustrates a flow chart of downlink transmission, as shown in fig. 1. In fig. 1, base station N1 is a serving cell maintaining base station for UE U2. In fig. 1, the step in block F1 is optional.
For theBase station N1Transmitting a first signaling in step S11; transmitting a first wireless signal in step S12; the second wireless signal is transmitted in step S13.
ForUE U2Receiving a first signaling in step S21; receiving a first wireless signal in step S22; the second wireless signal is received in step S23.
In embodiment 1, the first signaling is physical layer signaling. A first bit block is used to generate the first wireless signal and the second wireless signal. A receive time window of the first wireless signal precedes a receive time window of the second wireless signal. The first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode. The transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the first modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the first wireless signal. The transmission mode comprises at least one of { transmitting antenna port, mapping mode to time-frequency resource }. The first signaling is used to determine configuration information of the first radio signal, where the configuration information of the first radio signal includes { the first modulation and coding scheme, an RV (Redundancy Version) corresponding to the first radio signal, an NDI (New Data Indicator) corresponding to the first radio signal, a time-frequency resource occupied by the first radio signal, and at least one of an HARQ Process Number (Process Number) corresponding to the first radio signal.
As sub embodiment 1 of embodiment 1, the base station N1 transmits the second signaling in step S10, and the UE U2 receives the second signaling in step S20. The second signaling is higher layer signaling, and the second signaling is used by the UE U2 to determine at least one of { the second modulation and coding scheme, the expiration of the reception time window of the first radio signal, and the expiration of the reception time window of the second radio signal }.
As a sub-embodiment of sub-embodiment 1 of embodiment 1, the second signaling is higher layer signaling.
As a sub-embodiment of sub-embodiment 1 of embodiment 1, the first signaling and the second signaling together indicate the second modulation and coding scheme.
As sub-embodiment 2 of embodiment 1, the first signaling is used by the UE U2 to determine at least one of { the second modulation and coding scheme, an end time of a reception time window of the first radio signal, and an end time of a reception time window of the second radio signal }.
As sub-embodiment 3 of embodiment 1, the first bit block is a TB.
As a sub-embodiment 4 of embodiment 1, a coding rate corresponding to the first modulation and coding scheme is equal to a coding rate corresponding to the second modulation and coding scheme, and an order of a modulation scheme corresponding to the first modulation and coding scheme is higher than an order of a modulation scheme corresponding to the second modulation and coding scheme.
As a sub-embodiment 5 of embodiment 1, the first bit block is Channel coded (Channel Coding) to generate a second bit block, and the second bit block is divided into a third bit block and a fourth bit block. The first radio signal is an output of the third bit block after sequentially passing through a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and an OFDM signal Generation (Generation). The second wireless signal is an output of the fourth bit block after sequentially passing through a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and an OFDM signal Generation (Generation).
As sub-embodiment 5 of embodiment 1, the first wireless signal and the second wireless signal are transmitted in the same subframe.
As sub-embodiment 6 of embodiment 1, a reception time window of the first signaling precedes a reception time window of the second wireless signal. The sub-embodiment can avoid the interference of the uplink signal to the downlink physical layer signaling.
Example 2
Embodiment 2 illustrates timing charts of the first wireless signal and the second wireless signal, as shown in fig. 2. In fig. 2, oblique lines denote the first wireless signals, and cross lines denote the second wireless signals. Wherein the first time interval is optional.
In fig. 2, the first time window is a transmission time window of the first wireless signal, the second time window is a transmission time window of the second wireless signal, the third time window is a reception time window of the second wireless signal, and the fourth time window is a reception time window of the second wireless signal. The propagation delay in fig. 2 is the time required for the radio signal to travel from the base station to the UE.
As sub-embodiment 1 of embodiment 2, a reception time window of the first wireless signal and a reception time window of the second wireless signal are consecutive.
As a sub-embodiment 2 of embodiment 2, the time interval between the ending instant of the reception time window of the first radio signal and the starting instant of the reception time window of the second radio signal does not exceed the duration of 1 OFDM symbol. The time interval is used for OFDM symbol alignment.
As a sub-embodiment 3 of embodiment 2, the first time interval in fig. 2 is reserved for uplink transmission, the deadline of the first time interval is the deadline of the second time window, and the duration of the first time interval is equal to the propagation delay. The first time interval and a reception time window of the second wireless signal overlap.
Example 3
Embodiment 3 illustrates a downlink/uplink switching point diagram on the base station side, as shown in fig. 3. In fig. 3, the time domain resources identified by the slash line are reserved for downlink transmission, the time domain resources identified by the horizontal line are reserved for uplink transmission, and the time domain resources identified by the bold line frame are used for transmitting/receiving switching of the base station radio frequency module.
In embodiment 3, the time domain resource (for example, the thick line frame identifier) reserved for the downlink/uplink switching point is much smaller than the GP in the conventional TDD system, which significantly improves the transmission efficiency.
As a sub-embodiment 1 of embodiment 3, the time domain resource (as indicated by a bold line frame) reserved for the downlink/uplink switching point is less than 1 microsecond.
As a sub-embodiment 2 of embodiment 3, the time domain resource (as indicated by a bold frame) reserved for the downlink/uplink switching point is smaller than a Propagation Delay (Propagation Delay) from the base station to the UE, that is, for the downlink receiving UE, an uplink signal from another UE may be received in a receiving time window of the downlink wireless signal.
Example 4
Embodiment 4 illustrates a schematic diagram of time-frequency resources occupied by the first wireless signal and the second wireless signal, as shown in fig. 4. In fig. 4, oblique lines identify time-frequency resources occupied by the first wireless signals, cross lines identify time-frequency resources occupied by the second wireless signals, and vertical lines identify time-frequency resources occupied by the uplink wireless signals.
In embodiment 4, the frequency domain resources occupied by the first wireless signal are localized, and the frequency domain resources occupied by the first wireless signal are distributed. When the uplink wireless signal adopts localized scheduling, embodiment 4 can randomize the interference received by the second wireless signal, improving robustness.
As sub-embodiment 1 of embodiment 4, the first wireless signal and the second wireless signal occupy a first set of RUs and a second set of RUs, respectively. The first and second sets of RUs each include a positive integer number of RUs that occupy the duration of one OFDM symbol in the time domain and one subcarrier in the frequency domain. The number of RUs of the first RU set in one OFDM symbol is equal to the number of RUs of the second RU set in one OFDM symbol.
As sub-embodiment 1 of embodiment 4, the first wireless signal and the second wireless signal are respectively transmitted by a first antenna port set and a second antenna port set, and the first antenna port set and the second antenna port set respectively include a positive integer number of antenna ports. Antenna ports in the first set of antenna ports are UE-specific and antenna ports in the second set of antenna ports are cell-common.
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 is mainly composed of a first receiving module 101 and a second receiving module 102.
The first receiving module 101 is configured to receive a first wireless signal; the second receiving module 102 is configured to receive a second wireless signal.
In embodiment 5, a first bit block is used to generate the first wireless signal and the second wireless signal. The reception time window of the first wireless signal and the reception time window of the second wireless signal are consecutive. A receive time window of the first wireless signal precedes a receive time window of the second wireless signal. The first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode. The transmission efficiency corresponding to the second modulation coding scheme is lower than the transmission efficiency corresponding to the first modulation coding scheme, and the transmission scheme of the second wireless signal is different from the transmission scheme of the first wireless signal. The transmission mode comprises at least one of { transmitting antenna port, mapping mode to time-frequency resource }.
As sub embodiment 1 of embodiment 5, the first receiving module 101 is further configured to at least one of:
receiving a first message;
receiving the second information.
Wherein the first information is carried by physical layer signaling, and the first information is used to determine { the first modulation and coding scheme, the second modulation and coding scheme }. The second information is used to determine at least one of { an end time of a reception time window of the first wireless signal, an end time of a reception time window of the second wireless signal }.
As sub-embodiment 2 of embodiment 5, the first radio signal and the second radio signal are transmitted by using a beamforming method and a transmission diversity method, respectively.
Example 6
Embodiment 6 is a block diagram illustrating a processing apparatus in a base station, as shown in fig. 6. In fig. 6, the base station processing apparatus 200 is mainly composed of a first sending module 201 and a second sending module 202.
The first sending module 201 is configured to send and receive a first wireless signal; the second sending module 202 is configured to send a second wireless signal.
In embodiment 6, a first bit block is used for generating the first wireless signal and the second wireless signal. The time interval between the ending time of the transmission time window of the first wireless signal and the starting time of the transmission time window of the second wireless signal is less than 5 microseconds. A transmission time window of the first wireless signal precedes a transmission time window of the second wireless signal. The first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode. The transmission efficiency corresponding to the second modulation coding scheme is lower than the transmission efficiency corresponding to the first modulation coding scheme, and the transmission scheme of the second wireless signal is different from the transmission scheme of the first wireless signal. The transmission mode comprises at least one of { transmitting antenna port, mapping mode to time-frequency resource }.
As sub-embodiment 1 of embodiment 6, the first sending module 201 is further configured to at least one of:
sending the first message;
sending the second message.
Wherein the first information is carried by physical layer signaling, and the first information is used to determine { the first modulation and coding scheme, the second modulation and coding scheme }. The second information is used to determine at least one of { an end time of a reception time window of the first wireless signal, an end time of a reception time window of the second wireless 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 UE or the interrupt in the present invention includes but is not limited to a mobile phone, a tablet computer, a notebook, a network card, a low-cost terminal, an NB-IoT terminal, an eMTC terminal, a vehicle-mounted communication device, and other wireless communication devices. The base station or network side device in the present invention includes but is not limited to a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (16)
1. A method in a UE used for time division duplexing, comprising:
receiving a first wireless signal;
receiving a second wireless signal;
wherein a first block of bits is used to generate the first wireless signal and the second wireless signal; a reception time window of the first wireless signal and a reception time window of the second wireless signal are consecutive; or the time interval from the ending time of the receiving time window of the first wireless signal to the starting time of the receiving time window of the second wireless signal does not exceed the duration of 1 OFDM symbol; the receive time window of the first wireless signal precedes the receive time window of the second wireless signal; the first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode; the transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the first modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the first wireless signal; the transmission mode comprises at least one of a transmitting antenna port and a mapping mode of time-frequency resources; and the transmission channel corresponding to the first bit block is DL-SCH.
2. The method in a UE used for time division duplexing according to claim 1, wherein the first and second wireless signals are transmitted by first and second sets of antenna ports, respectively, the first and second sets of antenna ports comprising a positive integer number of antenna ports, respectively; the first set of antenna ports and the second set of antenna ports are different.
3. A method in a UE used for time division duplexing according to claim 1 or 2, comprising:
receiving first information; wherein the first information is carried by physical layer signaling, and the first information is used to determine the first modulation coding scheme and the second modulation coding scheme.
4. A method in a UE used for time division duplexing according to claim 1 or 2, comprising:
receiving second information; wherein the second information is used to determine at least one of an expiration of the reception time window of the first wireless signal and an expiration of the reception time window of the second wireless signal.
5. A method in a base station used for time division duplexing, comprising the steps of:
transmitting a first wireless signal;
transmitting a second wireless signal;
wherein a first block of bits is used to generate the first wireless signal and the second wireless signal; the transmission time window of the first wireless signal and the transmission time window of the second wireless signal are consecutive; or the time interval between the ending time of the transmission time window of the first wireless signal and the starting time of the transmission time window of the second wireless signal does not exceed the duration of 1 OFDM symbol; the transmission time window of the first wireless signal precedes the transmission time window of the second wireless signal; the first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode; the transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the first modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the first wireless signal; the transmission mode comprises at least one of a transmitting antenna port and a mapping mode of time-frequency resources; and the transmission channel corresponding to the first bit block is DL-SCH.
6. The method in a base station used for time division duplexing according to claim 5, wherein the first and second wireless signals are transmitted by first and second sets of antenna ports, respectively, the first and second sets of antenna ports comprising a positive integer number of antenna ports, respectively; the first set of antenna ports and the second set of antenna ports are different.
7. Method in a base station used for time division duplexing according to claim 5 or 6, comprising:
sending first information; wherein the first information is carried by physical layer signaling, and the first information is used to determine the first modulation coding scheme and the second modulation coding scheme.
8. Method in a base station used for time division duplexing according to claim 5 or 6, comprising:
sending the second information; wherein the second information is used to determine at least one of an expiration of a reception time window of the first wireless signal and an expiration of the reception time window of the second wireless signal.
9. A user equipment configured for dynamic scheduling, comprising:
a first receiving module: for receiving a first wireless signal;
a second receiving module: for receiving a second wireless signal;
wherein a first block of bits is used to generate the first wireless signal and the second wireless signal; a reception time window of the first wireless signal and a reception time window of the second wireless signal are consecutive; or the time interval from the ending time of the receiving time window of the first wireless signal to the starting time of the receiving time window of the second wireless signal does not exceed the duration of 1 OFDM symbol; the receive time window of the first wireless signal precedes the receive time window of the second wireless signal; the first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode; the transmission efficiency corresponding to the second modulation coding mode is lower than that corresponding to the first modulation coding mode, or the transmission mode of the second wireless signal is different from that of the first wireless signal; the transmission mode comprises at least one of a transmitting antenna port and a mapping mode of time-frequency resources; and the transmission channel corresponding to the first bit block is DL-SCH.
10. The UE of claim 9, wherein the first and second wireless signals are transmitted by first and second sets of antenna ports, respectively, and wherein the first and second sets of antenna ports comprise a positive integer number of antenna ports, respectively; the first set of antenna ports and the second set of antenna ports are different.
11. The UE of claim 9 or 10, wherein the first receiving module receives first information; wherein the first information is carried by physical layer signaling, and the first information is used to determine the first modulation and coding scheme and the second modulation and coding scheme.
12. The UE of claim 9 or 10, wherein the first receiving module receives second information; wherein the second information is used to determine at least one of an expiration of the reception time window of the first wireless signal and an expiration of the reception time window of the second wireless signal.
13. A base station device used for dynamic scheduling, comprising:
a first sending module: the first wireless signal is used for sending and receiving;
a second sending module: for transmitting a second wireless signal;
wherein a first block of bits is used to generate the first wireless signal and the second wireless signal; the transmission time window of the first wireless signal and the transmission time window of the second wireless signal are consecutive; or the time interval between the ending time of the transmission time window of the first wireless signal and the starting time of the transmission time window of the second wireless signal does not exceed the duration of 1 OFDM symbol; the transmission time window of the first wireless signal precedes the transmission time window of the second wireless signal; the first wireless signal adopts a first modulation coding mode, and the second wireless signal adopts a second modulation coding mode; the transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the first modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the first wireless signal; the transmission mode comprises at least one of a transmitting antenna port and a mapping mode of time-frequency resources; and the transmission channel corresponding to the first bit block is DL-SCH.
14. The base station device of claim 13, wherein the first wireless signal and the second wireless signal are transmitted by a first antenna port set and a second antenna port set, respectively, wherein the first antenna port set and the second antenna port set each comprise a positive integer number of antenna ports; the first set of antenna ports and the second set of antenna ports are different.
15. The base station device according to claim 13 or 14, wherein the first sending module sends first information; wherein the first information is carried by physical layer signaling, and the first information is used to determine the first modulation and coding scheme and the second modulation and coding scheme.
16. The base station device according to claim 13 or 14, wherein the first transmitting module transmits second information; wherein the second information is used to determine at least one of an expiration of a reception time window of the first wireless signal and an expiration of the reception time window of the second wireless signal.
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