CN107769903B - method and device for wireless communication - Google Patents
method and device for wireless communication Download PDFInfo
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- CN107769903B CN107769903B CN201610704077.6A CN201610704077A CN107769903B CN 107769903 B CN107769903 B CN 107769903B CN 201610704077 A CN201610704077 A CN 201610704077A CN 107769903 B CN107769903 B CN 107769903B
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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
Abstract
The invention discloses a method and a device in wireless communication.A UE firstly receives a wireless signal and then receives a second wireless signal, wherein a bit block is used for generating the wireless signal and the second wireless signal, the time interval of the ending time of the receiving time window of the wireless signal from the starting time of the receiving time window of the second wireless signal is less than the duration of 1 OFDM symbol, the receiving time window of the wireless signal is before the receiving time window of the second wireless signal, the wireless signal adopts a modulation coding mode, the 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 modulation coding mode.
Description
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, GPs (Guard Period) are usually configured between the time resource reserved for downlink transmission and the transmission resource reserved for uplink transmission, and the GP is used to overcome the interference of the uplink wireless signal to the downlink wireless signal.
In the Latency Reduction (LR) topic in 3GPP (3rd Generation Partner Project) Release 14, important application targets are low-delay communication, and for the requirement of reducing delay, the conventional LTE subframe structure needs to be redesigned, and the 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 accurate positioning of the UE, so the robustness is potential problems, and in step, the method can only partially reduce the GP length, and the performance is to be optimized in step.
It should be noted that, in case of no conflict, the features in the embodiments and the embodiments of the present application in the UE may be applied to the base station and vice versa.
The invention discloses methods used in time division duplex UE, which comprises the following steps:
-step a. receiving a wireless signal;
-step b.
The bit block is used for generating the th wireless signal and the second wireless signal, the receiving time window of the th wireless signal and the receiving time window of the second wireless signal are continuous, or the time interval of the ending time of the receiving time window of the th wireless signal and the starting time of the receiving time window of the second wireless signal is not more than 1 OFDM symbol duration, the receiving time window of the th wireless signal is before the receiving time window of the second wireless signal, the th wireless signal adopts the th modulation coding mode, the second wireless signal adopts the second modulation coding mode, the transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the th modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the th wireless signal, the transmission mode comprises of at least one of { transmitting antenna port, mode mapping to time-frequency resource }.
As embodiments, the UE is not interfered by the uplink signal from the terminal of the own cell in the receiving time window of the th wireless signal, and the UE is interfered by the uplink signal from the terminal of the own cell in the receiving time window of the second wireless signal.
In the above embodiment, the base station sends the downlink signal in the GP, so as to improve the transmission efficiency, further , the base station allocates different modulation and coding schemes to the radio signals of the same bit block, thereby avoiding an increase in BLER (block error Rate) caused by uplink interference, and improving Robustness (Robustness).
As embodiments, the Modulation and Coding scheme is MCS (Modulation and Coding Status).
As embodiments, the modulation and Coding scheme indicates the modulation scheme and Coding Rate (Coding Rate) used by the corresponding wireless signal.
As embodiments, the code rate corresponding to the modulation and coding scheme is equal to the code rate corresponding to the second modulation and coding scheme, and the order of the modulation scheme corresponding to the modulation and coding scheme is higher than the order of the modulation scheme corresponding to the second modulation and coding scheme.
As embodiments, the transmission channel corresponding to the bit block is DL-SCH (DownLink shared channel).
As embodiments, the radio signal is transmitted on PDSCH (Physical Downlink shared channel).
As embodiments, the second wireless signal is transmitted on the PDSCH.
As embodiments, the radio signal is transmitted on sPDSCH (short physical downlink shared channel).
As embodiments, the second wireless signal is transmitted over the sPDSCH.
As embodiments, the transmission Channel corresponding to the second wireless signal is an MCH (Multicast Channel).
As embodiments, the bit Block is TBs (Transport Block).
As embodiments, the -bit Block includes a plurality of TBs (Transport blocks).
The wireless 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 an 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 an sub-embodiment of the above embodiment, the precoding matrix corresponding to the third bit block is different from the precoding matrix corresponding to the fourth bit block.
As sub-embodiments of the above-described embodiments, the wireless signal to RE mapping method and the second wireless signal to RE mapping method are different.
As embodiments, the bit block includes a sub-bit block and a second sub-bit block, the th wireless signal is the th sub-bit block sequentially passing through a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), an output after OFDM signal Generation (Generation), the second wireless signal is the second sub-bit block sequentially passing through a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), a Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), an output after OFDM signal Generation (Generation).
As an sub-embodiment of the above embodiment, the layer to which the th sub-bit block is mapped is different from the layer to which the second sub-bit block is mapped.
As an sub-embodiment of the above embodiment, the precoding matrix corresponding to the th sub-bit block is different from the precoding matrix corresponding to the second sub-bit block.
As sub-embodiments of the above-described embodiments, the wireless signal to RE mapping method and the second wireless signal to RE mapping method are different.
Specifically, according to aspects of the present invention, the radio signal and the second radio signal are transmitted by a th antenna port set and a second antenna port set, respectively, the th antenna port set and the second antenna port set each include a positive integer number of antenna ports, the th antenna port set and the second antenna port set are different.
of the antenna ports transmit RS (Reference Signal) ports as embodiments as sub-embodiments of the present embodiment, the RS ports transmitted by different antenna ports are orthogonal.
As embodiments, the antenna port set is UE specific and the second antenna port set is cell common.
As embodiments, the antenna port set is UE specific and the second antenna port set is cell common.
As embodiments, the antenna port set is dynamically configured.
As embodiments, the second set of antenna ports is configured by higher layer signaling.
As embodiments, the radio signal employs a beamforming transmission scheme, and the second radio signal employs a transmission diversity transmission scheme.
In the above embodiment, the time-frequency resource occupied by the second radio signal may be used by multiple (instead of ) terminals to transmit uplink signals, and BLER is reduced by interference randomization.
Specifically, according to aspects of the present invention, the wireless signal and the second wireless signal occupy a RU (Resource Unit) set and a second RU set, respectively, the RU set and the second RU set each include a positive integer number of RUs occupying OFDM (Orthogonal frequency division Multiplexing) symbols in the time domain for duration, the RUs occupying subcarriers in the frequency domain, and the RU set occupies a different bandwidth than the second RU set.
As embodiments, the time-frequency resource occupied by the second wireless signal may be used by multiple (instead of ) terminals to transmit uplink signals, so as to avoid receiving severe interference from terminals.
As examples, the RU is RE (Resource Element).
As embodiments, there are at least two RUs, which have different corresponding subcarrier spacings.
As examples, the RU set is Localized (Localized) in the frequency domain and the second RU set is Distributed (Distributed) in the frequency domain.
As an example, the bandwidth occupied by a given set of RUs refers to the bandwidth between the RU occupying the highest frequency point in the given set of RUs and the RU occupying the lowest frequency point in the given set of RUs.
Specifically, according to aspects of the present invention, the time interval is reserved for uplink transmission, the time interval overlaps with the receiving time window of the second wireless signal, the receiver corresponding to the uplink transmission is the transmitter of the second wireless signal, the frequency domain resources occupied by the uplink transmission and the frequency domain resources occupied by the wireless signal belong to the same system bandwidths.
As embodiments, the sender of the second wireless signal is the sender of the th wireless signal.
As embodiments, the frequency domain resource occupied by the uplink transmission and the frequency domain resource occupied by the -th wireless signal belong to the same carriers.
As examples, the system bandwidth does not exceed 1000MHz (megahertz).
As examples, the system bandwidth does not exceed 100MHz (megahertz).
As embodiments, the system bandwidth corresponds to carriers.
As embodiments, the time interval being reserved for uplink transmission means that the time interval belongs to the last half of the time domain resources configured as GP.
As embodiments, the th time interval reserved for uplink transmission means that the sender of the second wireless signal schedules a terminal to transmit an uplink signal at the th time interval.
As embodiments, the th time interval reserved for uplink transmission means that the terminal scheduled by the sender of the second wireless signal transmits an uplink signal at the th time interval.
Specifically, according to aspects of the present invention, the step a further comprises the steps of:
step A0. receives th information.
Wherein the th information is carried by physical layer signaling, and the th information is used to determine { the th modulation and coding scheme, the second modulation and coding scheme }.
As embodiments, the physical layer signaling is DCI (Downlink Control Information).
As embodiments, the physical layer signaling is DCI for Downlink Grant (Downlink Grant).
As embodiments, the information indicates the th modulation and coding scheme, and the second modulation and coding scheme is associated with the th modulation and coding scheme.
As sub-embodiments of the above-mentioned embodiment, the index corresponding to the th 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 embodiments, the physical layer signaling is also used to determine the RU set and the second RU set.
As embodiments, the receive time window of the physical layer signaling precedes the receive time window of the second wireless signal.
Specifically, according to aspects of the present invention, the step a further comprises the steps of:
-a step a1. receiving second information.
Wherein the second information is used to determine at least of { an expiration time of a reception time window of the th wireless signal, an expiration time of a reception time window of the second wireless signal }.
As embodiments, the second information is carried by higher layer signaling.
As embodiments, the 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 methods used in a time division duplex base station, which comprises the following steps:
-step a. transmitting a wireless signal;
-step b.
The bit block is used for generating the th wireless signal and the second wireless signal, the sending time window of the th wireless signal and the sending time window of the second wireless signal are continuous, or the time interval of the ending time of the sending time window of the th wireless signal and the starting time of the sending time window of the second wireless signal is not more than 1 OFDM symbol duration, the sending time window of the th wireless signal is before the sending time window of the second wireless signal, the th wireless signal adopts the th modulation coding mode, the second wireless signal adopts the second modulation coding mode, the transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the th modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the th wireless signal, the transmission mode comprises of at least one of { sending antenna port, mode mapping to time-frequency resource }.
Specifically, according to aspects of the present invention, the radio signal and the second radio signal are transmitted by a th antenna port set and a second antenna port set, respectively, the th antenna port set and the second antenna port set each include a positive integer number of antenna ports, the th antenna port set and the second antenna port set are different.
Specifically, according to aspects of the present invention, the wireless signal and the second wireless signal occupy a RU set and a second RU set, respectively, the RU set and the second RU set each include a positive integer number of RUs, the RUs occupying OFDM symbol durations in the time domain, the RUs occupying subcarriers in the frequency domain, and the RU set occupies a different bandwidth than the second RU set.
Specifically, according to aspects of the present invention, the time interval is reserved for uplink transmission, the time interval overlaps with the receiving time window of the second wireless signal, the receiver corresponding to the uplink transmission is the transmitter of the second wireless signal, the frequency domain resources occupied by the uplink transmission and the frequency domain resources occupied by the wireless signal belong to the same system bandwidths.
Specifically, according to aspects of the present invention, the step a further comprises the steps of:
step A0. sends th information.
Wherein the th information is carried by physical layer signaling, and the th information is used to determine { the th modulation and coding scheme, the second modulation and coding scheme }.
Specifically, according to aspects of the present invention, the step a further comprises the steps of:
-a step a1. sending the second information.
Wherein the second information is used to determine at least of { an expiration time of a reception time window of the th wireless signal, an expiration time of a reception time window of the second wireless signal }.
The invention discloses kinds of user equipment used for dynamic scheduling, which comprises the following modules:
a th receiving module for receiving th wireless signals;
a second receiving module: for receiving the second wireless signal.
The bit block is used for generating the th wireless signal and the second wireless signal, the receiving time window of the th wireless signal and the receiving time window of the second wireless signal are continuous, or the time interval of the ending time of the receiving time window of the th wireless signal and the starting time of the receiving time window of the second wireless signal is not more than 1 OFDM symbol duration, the receiving time window of the th wireless signal is before the receiving time window of the second wireless signal, the th wireless signal adopts the th modulation coding mode, the second wireless signal adopts the second modulation coding mode, the transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the th modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the th wireless signal, the transmission mode comprises of at least one of { transmitting antenna port, mode mapping to time-frequency resource }.
As embodiments, the above user equipment is characterized in that the radio signal and the second radio signal are transmitted by a th set of antenna ports and a second set of antenna ports, respectively, the th set of antenna ports and the second set of antenna ports respectively comprising a positive integer number of antenna ports, the th set of antenna ports and the second set of antenna ports being different.
As embodiments, the above user equipment is characterized in that the radio signal and the second radio signal occupy a RU set and a second RU set, respectively, the RU set and the second RU set each include a positive integer number of RUs occupying OFDM symbols in the time domain for a duration, the RUs occupying subcarriers in the frequency domain, the RU set occupying a different bandwidth than the second RU set.
As embodiments, the above ue is characterized in that the time interval is reserved for uplink transmission, the time interval overlaps with the receiving time window of the second radio signal, the receiver corresponding to the uplink transmission is the transmitter of the second radio signal, and the frequency domain resources occupied by the uplink transmission and the radio signal belong to the same system bandwidths.
As embodiments, the aforementioned user equipment is characterized in that the receiving module is further configured to receive th information, wherein the th information is carried by physical layer signaling, and the th information is used to determine { the th modulation and coding scheme, the second modulation and coding scheme }.
The aforementioned user equipment, as embodiments, wherein the receiving module is further configured to receive second information, wherein the second information is used to determine of at least the expiration of the th radio signal reception time window and the expiration of the second radio signal reception time window.
The invention discloses base station equipment used for dynamic scheduling, which comprises the following modules:
the th sending module is used for sending and receiving th wireless signals;
a second sending module: for transmitting the second wireless signal.
The bit block is used for generating the th wireless signal and the second wireless signal, the sending time window of the th wireless signal and the sending time window of the second wireless signal are continuous, or the time interval of the ending time of the sending time window of the th wireless signal and the starting time of the sending time window of the second wireless signal is not more than 1 OFDM symbol duration, the sending time window of the th wireless signal is before the sending time window of the second wireless signal, the th wireless signal adopts the th modulation coding mode, the second wireless signal adopts the second modulation coding mode, the transmission efficiency corresponding to the second modulation coding mode is lower than the transmission efficiency corresponding to the th modulation coding mode, or the transmission mode of the second wireless signal is different from the transmission mode of the th wireless signal, the transmission mode comprises of at least one of { sending antenna port, mode mapping to time-frequency resource }.
As embodiments, the base station device is characterized in that the radio signal and the second radio signal are transmitted by a th antenna port set and a second antenna port set, respectively, and the th antenna port set and the second antenna port set respectively include a positive integer number of antenna ports, the th antenna port set and the second antenna port set are different.
As embodiments, the above base station device is characterized in that the wireless signal and the second wireless signal occupy a RU set and a second RU set, respectively, the RU set and the second RU set each include a positive integer number of RUs, the RUs occupy a duration of OFDM symbols in the time domain, the RUs occupy subcarriers in the frequency domain, and a bandwidth occupied by the RU set is different from a bandwidth occupied by the second RU set.
As embodiments, the above base station device is characterized in that the time interval is reserved for uplink transmission, the time interval overlaps with the receiving time window of the second wireless signal, the receiver corresponding to the uplink transmission is the base station, and the frequency domain resource occupied by the uplink transmission and the frequency domain resource occupied by the wireless signal belong to the same system bandwidths.
As embodiments, the base station device is characterized in that the transmission module is further configured to transmit information, wherein the information is carried by physical layer signaling, and the information is used to determine { the th modulation and coding scheme, the second modulation and coding scheme }.
The base station apparatus as examples, wherein the transmission module is further configured to transmit second information, wherein the second information is used to determine at least of { an end time of a reception time window of the th radio signal, an end time of the reception time window of the second radio 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 downstream transmission according to embodiments of the invention;
FIG. 2 shows timing diagrams of the wireless signals and the second wireless signals in accordance with embodiments of the present invention;
fig. 3 shows a schematic diagram of downlink/uplink switching points on the base station side according to embodiments of the present invention;
FIG. 4 is a diagram illustrating time-frequency resources occupied by a wireless signal and a second wireless signal according to embodiments of the invention;
fig. 5 shows a block diagram of a processing means in a UE according to embodiments of the invention;
fig. 6 shows a block diagram of a processing means in a base station according to embodiments of the invention;
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application can 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 N1The signaling is transmitted in step S11, the wireless signal is transmitted in step S12, and the second wireless signal is transmitted in step S13.
For theUE U2Received in step S21 th signaling, receiving th wireless signal in step S22, and receiving second wireless signal in step S23.
In embodiment 1, the signaling is physical layer signaling, -th bit block is used to generate the -th wireless signal and the second wireless signal, the -th wireless signal has a receiving time window before the receiving time window of the second wireless signal, the -th wireless signal uses -th modulation coding scheme, the second wireless signal uses second modulation coding scheme, the second modulation coding scheme corresponds to a transmission efficiency lower than the transmission efficiency corresponding to the -th modulation coding scheme, or the second wireless signal has a transmission scheme different from the -th wireless signal, the transmission scheme includes at least 856 of { transmitting antenna port, mapping scheme to time-frequency resource }, the 897-th signaling is used to determine configuration information of the -th wireless signal, the configuration information of the -th wireless signal includes at least 8585 modulation coding scheme, the RV (Redundancy Version) corresponding to the -th wireless signal, the Redundancy Version 5848 of the HARQ Data (Redundancy Version) corresponding to the wireless signal, the HARQ Process occupation of at least the pilot symbol 59648).
In sub-embodiment 1 of embodiment 1, the base station N1 transmits a second signaling in step S10, and the UE U2 receives the second signaling in step S20, wherein the second signaling is a higher layer signaling, and the second signaling is used by the UE U2 to determine at least of { the second modulation and coding scheme, the expiration of the reception time window of the th wireless signal, and the expiration of the reception time window of the second wireless signal }.
As an sub-embodiment of sub-embodiment 1 of embodiment 1, the second signaling is higher layer signaling.
As an sub-embodiment of sub-embodiment 1 of embodiment 1, the th signaling and the second signaling together indicate the second modulation and coding scheme.
As sub-embodiment 2 of embodiment 1, the th signaling is used by the UE U2 to determine at least of { the second modulation and coding scheme, the expiration of the th radio signal reception time window, the expiration of the second radio signal reception time window }.
As sub-embodiment 3 of embodiment 1, the -th bit block is TBs.
As sub-embodiment 4 of embodiment 1, a coding rate corresponding to the th 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 th 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 th 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 th wireless signal is an output of the third bit block after being sequentially modulated by a Modulation Mapper (Modulation Mapper), a Layer Mapper (layermap), Precoding (Precoding), a Resource Element Mapper (Resource Element Mapper), and an OFDM signal Generation (Generation), and the second wireless signal is an output of the fourth bit block after being sequentially modulated by a Modulation Mapper (Modulation Mapper), a Layer Mapper (Layer Mapper), Precoding (Precoding), a Resource Element Mapper (Resource Element), and an OFDM signal Generation (Generation).
As sub-embodiment 5 of embodiment 1, the th wireless signal and the second wireless signal are transmitted in the same subframes.
As sub-embodiment 6 of embodiment 1, the receiving time window of the th signaling is before the receiving time window of the second wireless signal.
Example 2
Embodiment 2 illustrates a timing diagram of th wireless signal and the second wireless signal, as shown in fig. 2, slashes identify th wireless signal and crosses identify the second wireless signal, wherein the th time interval is optional.
In fig. 2, the th time window is the th wireless signal transmission time window, the second time window is the second wireless signal transmission time window, the third time window is the second wireless signal reception time window, and the fourth time window is the second wireless signal reception time window, the propagation delay in fig. 2 is the time required for the wireless signal to travel from the base station to the UE.
As sub-embodiment 1 of embodiment 2, a reception time window of the th 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 end of the reception time window of the th radio signal and the start of the reception time window of the second radio signal does not exceed the duration of 1 OFDM symbol.
As a sub-embodiment 3 of embodiment 2, the th time interval in FIG. 2 is reserved for upstream transmission, the expiration of the th time interval is the expiration of a second time window, the th time interval has a duration equal to the propagation delay, the th time interval overlaps the reception time window of the second wireless signal.
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 a wireless signal and a second wireless signal, as shown in fig. 4, a diagonal line identifies the time-frequency resource occupied by a wireless signal, a cross line identifies the time-frequency resource occupied by the second wireless signal, and a vertical line identifies the time-frequency resource occupied by an uplink wireless signal.
In embodiment 4, the frequency domain resource occupied by the th wireless signal is localized, and the frequency domain resource occupied by the th wireless signal is distributed, when the uplink wireless signal adopts localized scheduling, embodiment 4 can randomize the interference received by the second wireless signal, thereby improving robustness.
As sub-embodiment 1 of embodiment 4, the th and second wireless signals occupy and second RU sets, respectively, the and second RU sets each include a positive integer number of RUs occupying OFDM symbols in the time domain for a duration of OFDM symbols in the frequency domain for subcarriers, the RU set has the same number of RUs in OFDM symbols as the OFDM symbols.
As sub-embodiment 1 of embodiment 4, the th and second wireless signals are transmitted by and second sets of antenna ports, respectively, the th and second sets of antenna ports each including a positive integer number of antenna ports, the antenna ports in the th set of antenna ports are UE-specific and the 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 UEs, as shown in fig. 5, a UE processing device 100 is mainly composed of a th receiving module 101 and a second receiving module 102.
The th receiving module 101 is used for receiving th wireless signals, and the 102 th receiving module is used for receiving second wireless signals.
In embodiment 5, an -bit block is used to generate the radio signal and the second radio signal, the radio signal reception time window and the second radio signal reception time window are consecutive, the radio signal reception time window is before the second radio signal reception time window, the radio signal uses a modulation and coding scheme, the second radio signal uses a second modulation and coding scheme, the second modulation and coding scheme has a transmission efficiency lower than that of the modulation and coding scheme, and the second radio signal has a transmission scheme different from that of the radio signal, the transmission scheme includes at least of { transmit antenna port, mapping scheme to time-frequency resource }.
As sub-embodiment 1 of embodiment 5, the th receiving module 101 is further configured to at least :
receiving th message;
receiving the second information.
Wherein the th information is carried by physical layer signaling, the th information is used to determine the th modulation coding scheme, the second information is used to determine at least one of the cutoff time of the th radio signal reception time window, the cutoff time of the second radio signal reception time window.
As sub-embodiment 2 of embodiment 5, the th radio signal and the second radio signal are transmitted by using beamforming and transmit diversity, respectively.
Example 6
Embodiment 6 illustrates a block diagram of a processing device in base stations, as shown in fig. 6, a base station processing device 200 is mainly composed of a th transmitting module 201 and a second transmitting module 202.
The th sending module 201 is used for sending and receiving th wireless signals, and the 202 th sending module is used for sending second wireless signals.
In embodiment 6, an -bit block is used to generate the th wireless signal and the second wireless signal, a time interval between a cutoff time of a transmission time window of the th wireless signal and a start time of the transmission time window of the second wireless signal is less than 5 microseconds, a transmission time window of the th wireless signal is before the transmission time window of the second wireless signal, the th wireless signal adopts a th modulation and coding scheme, the second wireless signal adopts a second modulation and coding scheme, transmission efficiency corresponding to the second modulation and coding scheme is lower than transmission efficiency corresponding to the th modulation and coding scheme, and transmission scheme of the second wireless signal is different from transmission scheme of the th wireless signal, the transmission scheme includes which is at least one of { transmission antenna port, mapping scheme to time-frequency resource }.
As a sub-embodiment 1 of the embodiment 6, the th sending module 201 is further configured to at least :
sending th message;
sending the second message.
Wherein the th information is carried by physical layer signaling, the th information is used to determine the th modulation coding scheme, the second information is used to determine at least one of the cutoff time of the th radio signal reception time window, the cutoff time of the second radio signal reception time window.
Accordingly, the present application is not limited to any particular combination of software and hardware, and the UE or interrupt in the present invention includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a network card, a low-cost terminal, an NB-IoT terminal, an eMTC terminal, and a vehicle-mounted communication device.
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 (14)
1, method in a UE used for time division duplexing, comprising the steps of:
-step a. receiving a wireless signal;
-step b. receiving a second radio signal;
the th bit block is used for generating the th wireless signal and the second wireless signal, the receiving time window of the th wireless signal and the receiving time window of the second wireless signal are continuous, or the time interval of the ending time of the receiving time window of the th wireless signal from the starting time of the receiving time window of the second wireless signal is not more than 1 OFDM symbol duration, the receiving time window of the th wireless signal is before the receiving time window of the second wireless signal, the th wireless signal adopts the modulation coding mode, the second wireless signal adopts the second modulation coding mode, the transmission efficiency corresponding to the second modulation coding mode is lower than that corresponding to the modulation coding mode, or the transmission mode of the second wireless signal is different from that of the th wireless signal, and the transmission mode comprises at least of { transmitting antenna port, mapping mode to time-frequency resources }.
2. The method of claim 1, wherein the th wireless signal and the second wireless signal are sent by a th set of antenna ports and a second set of antenna ports, respectively, wherein the th set of antenna ports and the second set of antenna ports comprise a positive integer number of antenna ports, respectively, wherein the th set of antenna ports and the second set of antenna ports are different.
3. The method of claim 1 or 2, wherein the th wireless signal and the second wireless signal respectively occupy RE set and second RE set, wherein the RE set and the second RE set respectively comprise positive integer numbers of REs, wherein the REs occupy OFDM symbol duration in time domain, wherein the REs occupy subcarriers in frequency domain, and wherein the bandwidth occupied by the RE set is different from the bandwidth occupied by the second RE set.
4. The method of claim 1 or 2, wherein an th time interval is reserved for uplink transmission, the th time interval overlaps with a receiving time window of the second wireless signal, a receiver corresponding to the uplink transmission is a transmitter of the second wireless signal, and frequency domain resources occupied by the uplink transmission and frequency domain resources occupied by the th wireless signal belong to the same system bandwidths.
5. The method according to claim 1 or 2, wherein said step a further comprises the steps of:
-step A0. receiving information;
wherein the th information is carried by physical layer signaling, and the th information is used to determine { the th modulation and coding scheme, the second modulation and coding scheme }.
6. The method according to claim 1 or 2, wherein said step a further comprises the steps of:
-a step a1. receiving second information;
wherein the second information is used to determine at least of { an expiration time of a reception time window of the th wireless signal, an expiration time of a reception time window of the second wireless signal }.
7, A method used in a time division duplex base station, comprising the steps of:
-step a. transmitting a wireless signal;
-step b. transmitting a second radio signal;
the th bit block is used for generating the th wireless signal and the second wireless signal, the time window for transmitting the th wireless signal and the time window for transmitting the second wireless signal are continuous, or the time interval from the cut-off time of the th wireless signal to the start time of the time window for transmitting the second wireless signal is not more than 1 OFDM symbol duration, the time window for transmitting the th wireless signal is before the time window for transmitting the second wireless signal, the th wireless signal adopts a modulation coding mode, 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 modulation coding mode, or the transmission mode of the second wireless signal is different from that of the th wireless signal, and the transmission mode comprises at least of { transmitting antenna port, mapping mode to time-frequency resources }.
8. The method of claim 7, wherein the th wireless signal and the second wireless signal are sent by a th set of antenna ports and a second set of antenna ports, respectively, wherein the th set of antenna ports and the second set of antenna ports comprise a positive integer number of antenna ports, respectively, wherein the th set of antenna ports and the second set of antenna ports are different.
9. The method of claim 7 or 8, wherein the th wireless signal and the second wireless signal respectively occupy RE set and second RE set, wherein the RE set and the second RE set respectively comprise positive integer numbers of REs, wherein the REs occupy OFDM symbol duration in time domain, wherein the REs occupy subcarriers in frequency domain, and wherein the bandwidth occupied by the RE set is different from the bandwidth occupied by the second RE set.
10. The method of claim 7 or 8, wherein an th time interval is reserved for uplink transmission, the th time interval overlaps with a receiving time window of the second wireless signal, a receiver corresponding to the uplink transmission is the base station, and frequency domain resources occupied by the uplink transmission and frequency domain resources occupied by the th wireless signal belong to the same system bandwidths.
11. The method according to claim 7 or 8, wherein the step a further comprises the steps of:
step A0. sending th information;
wherein the th information is carried by physical layer signaling, and the th information is used to determine { the th modulation and coding scheme, the second modulation and coding scheme }.
12. The method according to claim 7 or 8, wherein the step a further comprises the steps of:
-a step a1. sending the second information;
wherein the second information is used to determine at least of { an expiration time of a reception time window of the th wireless signal, an expiration time of a reception time window of the second wireless signal }.
user equipment used for dynamic scheduling, comprising the following modules:
a th receiving module for receiving th wireless signals;
a second receiving module: for receiving a second wireless signal;
the th bit block is used for generating the th wireless signal and the second wireless signal, the receiving time window of the th wireless signal and the receiving time window of the second wireless signal are continuous, or the time interval of the ending time of the receiving time window of the th wireless signal from the starting time of the receiving time window of the second wireless signal is not more than 1 OFDM symbol duration, the receiving time window of the th wireless signal is before the receiving time window of the second wireless signal, the th wireless signal adopts the modulation coding mode, the second wireless signal adopts the second modulation coding mode, the transmission efficiency corresponding to the second modulation coding mode is lower than that corresponding to the modulation coding mode, or the transmission mode of the second wireless signal is different from that of the th wireless signal, and the transmission mode comprises at least of { transmitting antenna port, mapping mode to time-frequency resources }.
14, base station equipment used for dynamic scheduling, comprising the following modules:
the th sending module is used for sending and receiving th wireless signals;
a second sending module: for transmitting a second wireless signal;
the th bit block is used for generating the th wireless signal and the second wireless signal, the time window for transmitting the th wireless signal and the time window for transmitting the second wireless signal are continuous, or the time interval from the cut-off time of the th wireless signal to the start time of the time window for transmitting the second wireless signal is not more than 1 OFDM symbol duration, the time window for transmitting the th wireless signal is before the time window for transmitting the second wireless signal, the th wireless signal adopts a modulation coding mode, 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 modulation coding mode, or the transmission mode of the second wireless signal is different from that of the th wireless signal, and the transmission mode comprises at least of { transmitting antenna port, mapping mode to time-frequency resources }.
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