WO2017028746A1 - 无线通信系统中的装置和方法 - Google Patents
无线通信系统中的装置和方法 Download PDFInfo
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- WO2017028746A1 WO2017028746A1 PCT/CN2016/094856 CN2016094856W WO2017028746A1 WO 2017028746 A1 WO2017028746 A1 WO 2017028746A1 CN 2016094856 W CN2016094856 W CN 2016094856W WO 2017028746 A1 WO2017028746 A1 WO 2017028746A1
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- user equipment
- power signal
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- allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
Definitions
- the present disclosure relates to the field of wireless communication technologies, and in particular, to an interference signal in multiple transmissions in a wireless communication system that solves Multi-User Superposition Transmission (MUST) to effectively improve data reception rate. And a device and method in a wireless communication system that superimposes the throughput of the transmission.
- MUST Multi-User Superposition Transmission
- the base station superimposes the data streams of different users after allocating different transmission powers according to the user channel, and the user equipment end uses, for example, a serial interference cancellation mechanism to eliminate the interference from other user equipments. Interference, extracting its own target data stream from the received superimposed data stream. If the target data stream fails to be extracted, the user equipment notifies the base station that the base station will simply retransmit the data stream. If the retransmission is still a superimposed transmission, there will still be interference from other users in the retransmitted data stream.
- the interference signal power may also be enhanced, thereby causing extraction by retransmission.
- the likelihood of a target data stream is reduced.
- an apparatus in a wireless communication system comprising: a transmitting unit configured to transmit using a superposition coding synthesis to a plurality of user equipments including at least a first user equipment and a second user equipment a first allocation signal, the first allocation signal comprising at least a first power signal portion for the first user equipment and a second power signal portion for the second user equipment; the receiving unit configured to receive the first user equipment and At least one feedback retransmission request in the second user equipment; and a processing unit configured to process the first power signal portion and the second power signal portion with a predetermined processing coefficient to obtain a second allocation in response to the retransmission request a signal, wherein the transmitting unit is further configured to send a second allocation signal to the first user equipment and the second user equipment, and the first user equipment and the second user equipment combine the first allocation signal and the second allocation signal to respectively Data for the first user device and data for the second user device are obtained.
- one of the first power signal portion and the second power signal portion is attenuated or cancelled in the combined first and second distribution signals.
- the processing unit is further configured to adjust a transmit power of at least one of the first power signal portion and the second power signal portion to obtain a second distribution signal.
- the transmitting unit is further configured to send a merge indication indicating how to perform the merge operation to the first user equipment and the second user equipment, respectively, to be merged by the first user equipment and the second user equipment according to the merge Instructing to merge the first distribution signal and the second distribution signal.
- the merge indication is included in higher layer signaling or physical layer signaling.
- the merging indication is to perform a merging operation to enhance the higher power signal portion of the first power signal portion and the second power signal portion.
- the merging indication is to perform a merging operation to enhance respective power signal portions of the first power signal portion and the second power signal portion for the first user equipment and the second user equipment, respectively.
- the predetermined processing coefficient is determined based on a Hadamard matrix of.
- an apparatus in a wireless communication system comprising: a receiving unit configured to receive a first allocation signal from a base station, wherein the first allocation signal is synthesized using superposition coding And including at least a first power signal portion for the first user equipment and a second power signal portion for the second user equipment; the processing unit configured to derive data for the first user equipment based on the first allocation signal; and transmitting a unit configured to send a retransmission request to the base station if the processing unit does not obtain data for the first user equipment according to the first allocation signal, wherein the receiving unit is further configured to receive the second allocation signal from the base station, The second allocation signal is obtained by the base station processing the first power signal portion and the second power signal portion with a predetermined processing coefficient in response to a retransmission request of at least one of the first user equipment and the second user equipment, and Wherein the processing unit is further configured to pair the first distribution signal and the second distribution signal They are combined to obtain the data for the first user device
- an apparatus in a wireless communication system comprising: a receiving unit configured to receive a first allocation signal, the first allocation signal comprising at least a first user equipment and a second user a first power signal portion and a second power signal portion transmitted by the device on the same first wireless transmission resource; the processing unit configured to obtain data from the first user equipment and the second user equipment according to the first allocation signal; And a sending unit configured to send to the first user equipment and the second user equipment if the processing unit fails to obtain data from at least one of the first user equipment and the second user equipment according to the first allocation signal a retransmission request, wherein the receiving unit is further configured to receive a second allocation signal, the second allocation signal including at least a first user equipment and a second user equipment transmitting on the same second wireless transmission resource in response to the retransmission request a third power signal portion and a fourth power signal portion, a third power signal portion and a fourth power signal portion Obtained by processing the first power signal portion and the second power signal
- an apparatus in a wireless communication system comprising: a transmitting unit configured to transmit a wireless transmission of a second power signal portion with a second user equipment at a first transmit power a first power signal portion is transmitted to the base station on the first wireless transmission resource having the same resource; the receiving unit is configured to receive a retransmission request from the base station; and the processing unit is configured Processing the first power signal portion with a predetermined processing coefficient to obtain a third power signal portion in response to the retransmission request, wherein the transmitting unit is further configured to transmit the fourth power with the second user equipment at the third transmit power Transmitting, on the second wireless transmission resource with the same radio transmission resource of the signal part, a third power signal part to the base station, where the fourth power signal part is that the second user equipment processes the second power signal part with a predetermined processing coefficient in response to the retransmission request And got it.
- a method in a wireless communication system comprising: a transmitting step of transmitting a usage overlay code to a plurality of user equipments including at least a first user equipment and a second user equipment a first distribution signal, the first distribution signal comprising at least a first power signal portion for the first user equipment and a second power signal portion for the second user equipment; and a receiving step for receiving the first user equipment and the At least one feedback retransmission request in the two user equipments; and processing steps for processing the first power signal portion and the second power signal portion with a predetermined processing coefficient to obtain a second allocation signal in response to the retransmission request,
- the second allocation signal is further sent to the first user equipment and the second user equipment, and the first user equipment and the second user equipment combine the first allocation signal and the second allocation signal to obtain respectively Data of the first user device and data for the second user device.
- a method in a wireless communication system comprising: a receiving step of receiving a first allocation signal from a base station, wherein the first allocation signal is synthesized using superposition coding And comprising at least a first power signal portion for the first user equipment and a second power signal portion for the second user equipment; processing steps for obtaining data for the first user equipment based on the first allocation signal; and transmitting step And configured to send a retransmission request to the base station if the data for the first user equipment is not obtained according to the first allocation signal, where the second allocation signal from the base station is further received in the receiving step, where the second allocation signal is a base station Obtained in response to a retransmission request of at least one of the first user equipment and the second user equipment, processing the first power signal portion and the second power signal portion with a predetermined processing coefficient, and wherein, in the processing step Merging the first distribution signal and the second distribution signal to obtain a first user equipment It is.
- a method in a wireless communication system comprising: a receiving step of receiving a first allocation signal, the first allocation signal comprising at least a first user equipment and a second user equipment a first power signal portion and a second power signal portion transmitted on the same first wireless transmission resource; and processing steps for obtaining respectively from the first user according to the first allocation signal Data of the device and the second user equipment; and a transmitting step of, to the first user equipment and, if the data from at least one of the first user equipment and the second user equipment is not successfully obtained according to the first allocation signal
- the second user equipment sends a retransmission request, where the second allocation signal is further received in the receiving step, the second allocation signal includes at least the first user equipment and the second user equipment are in the same second radio transmission resource in response to the retransmission request
- the third power signal portion and the fourth power signal portion transmitted, the third power signal portion and the fourth power signal portion are obtained by processing the first power signal portion and the second power signal portion with predetermined processing coefficient
- a method in a wireless communication system comprising: a transmitting step of transmitting, at a first transmit power, a wireless transmission resource of a second power signal portion with a second user equipment Transmitting, by the first wireless transmission resource, a first power signal portion to the base station; receiving a step of receiving a retransmission request from the base station; and processing step of, in response to the retransmission request, the first power signal with a predetermined processing coefficient Partially processing to obtain a third power signal portion, wherein, in the transmitting step, transmitting to the base station on the second wireless transmission resource that is the same as the wireless transmission resource of the fourth user signal portion transmitted by the second user equipment The third power signal portion, the fourth power signal portion, is obtained by the second user equipment processing the second power signal portion with a predetermined processing coefficient in response to the retransmission request.
- an electronic device can include a transceiver and one or more processors, the one or more processors can be configured to perform the wireless communication described above in accordance with the present disclosure The method in the system or the function of the corresponding unit.
- the data reception rate and the throughput of the multi-stream superimposed transmission can be improved.
- FIG. 1 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to an embodiment of the present disclosure
- FIG. 2 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to another embodiment of the present disclosure
- FIG. 3 is a flowchart showing an example of a signaling interaction procedure for downlink transmission of an embodiment of the present disclosure
- FIG. 4 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to still another embodiment of the present disclosure
- FIG. 5 is a block diagram showing a functional configuration example of a device in a wireless communication system according to still another embodiment of the present disclosure
- FIG. 6 is a flowchart illustrating an example of a signaling interaction procedure for uplink transmission, according to an embodiment of the present disclosure
- FIG. 7 is a flowchart illustrating a process example of a method in a wireless communication system according to an embodiment of the present disclosure
- FIG. 8 is a flowchart illustrating a process example of a method in a wireless communication system according to another embodiment of the present disclosure.
- FIG. 9 is a flowchart illustrating a process example of a method in a wireless communication system according to still another embodiment of the present disclosure.
- FIG. 10 is a flowchart illustrating a process example of a method in a wireless communication system according to still another embodiment of the present disclosure.
- FIG. 11 is a block diagram showing an example structure of a personal computer which is an information processing device which can be employed in an embodiment of the present disclosure
- FIG. 12 is a block diagram showing a first example of a schematic configuration of an evolved base station (eNB) to which the technology of the present disclosure may be applied;
- eNB evolved base station
- FIG. 13 is a block diagram showing a second example of a schematic configuration of an eNB to which the technology of the present disclosure may be applied;
- FIG. 14 is a block diagram showing an example of a schematic configuration of a smartphone that can apply the technology of the present disclosure.
- the transmitter can use the same transmission resource to communicate with multiple receivers.
- the current downlink multi-user overlay transmission can support the base station to simultaneously send multiple data streams to more than one user equipment without using different time, frequency or multi-antenna technologies for distinguishing.
- the radio transmitter Tx communicates with the first receiver Rx1 via the first physical communication link L1 and the radio transmitter Tx communicates with the receiver Rx2 via the second communication link L2.
- the radio conditions are weaker for the first receiver/link (eg, the location is farther from the transmitting end) and stronger for the second receiver/link (eg, the location is closer to the transmitting end) (this may be the case) It is temporary because radio conditions are constantly changing, especially for mobile stations.
- the signal to interference and noise ratio SINR and carrier interference C/I ratio of the first receiver is lower (or much lower) than the corresponding SINR and C/I ratio of the second transmitter.
- the transmitters Tx of the relative radio conditions of the two receivers can proportionally allocate their power budget between the two receivers for a particular time slot and a particular carrier frequency, such that it is intended for the second receiver Rx2 (compared to The second data block of the receiver under strong radio conditions transmits the first data block intended for the first receiver Rx1 (the receiver under weaker radio conditions) with higher power than the second data block.
- the transmitter Tx may use sufficient power for the intended first receiver Rx1 A block of data to allow the first receiver Rx1 to decode the block.
- the transmitter Tx may then use less power for the second data block intended for the second receiver Rx2, but still sufficient for the second receiver Rx2 to be used to cancel or reduce the transmission caused by the first data block.
- the interference cancellation of the interference is to decode the second data block.
- the transmitter Tx then transmits the two data blocks on the same carrier frequency and at the same time. Therefore, the two data blocks can be considered to "collide". Since the first data block is transmitted with a power allocation higher than the second data block, the second data block is only presented to the first receiver Rx1 as noise or interference increase. If the power offset between the transmissions of the two data blocks is sufficiently high, the SINR degradation at the first receiver Rx1 may be small and even insignificant.
- the first receiver Rx1 should be able to decode the first data block.
- the second receiver Rx2 should also be able to decode the first data block because the second receiver Rx2 receives the first data block with an SINR better than the first receiver Rx1 due to the stronger radio conditions of the second receiver Rx2 To.
- the second receiver Rx2 can process it as interference and use known interference cancellation techniques from the overall signal received during the period in which the two data blocks were received. Eliminate this interference.
- the residual signal represents a second block of data combined with noise and interference originating from other sources. If the second data block is transmitted with sufficient power (but at a lower power than the first data block) with respect to the transmission rate of the second data block and the radio condition of the second receiver Rx2, the second receiver Rx2 should be able to decode the second data block Two data blocks.
- this method can be extended to three or more receivers.
- the maximum power allocation can be used to transmit to the receiver in the weakest radio condition
- the minimum power allocation can be used to transmit to the receiver in the strongest radio condition
- the intermediate power can be allocated For use Receiver in intermediate radio conditions.
- the receiver in the strongest radio condition can then decode the data block intended for the receiver in the weakest radio condition, remove the decoded block from the received signal, and decode the receiver intended for use in the intermediate radio condition.
- the data block, the second decoded block is eliminated, and finally the data block intended for itself is decoded (this decoding/cancellation process may be referred to as progressive interference cancellation).
- a receiver in an intermediate radio condition can also decode a block of data intended for a receiver in the weakest radio condition, remove it from the received signal, and then decode the block of data intended for itself.
- a receiver in the weakest radio condition may be able to directly decode a block of data intended for it because this block of data is transmitted at the highest power level. It will be appreciated that those skilled in the art will be able to extend the progressive interference cancellation technique to four or more receivers without additional experimentation or further inventive work.
- the receiver may be a mobile station, such as a user equipment, and the transmitter may be a base transceiver station, such as an eNB, such as a data packet, a transport block.
- retransmission problems such as hybrid automatic repeat request (HARQ) are required when applying them to an actual communication system.
- HARQ hybrid automatic repeat request
- the receiver can send a corresponding retransmission request to the transmitter.
- the superimposed data block (the data block that cannot be decoded in the initial transmission) is simply retransmitted as the above-described superimposition coding technique, it is transmitted by the data block relative to other receivers during the retransmission process.
- the resulting interference is also enhanced, so even if the transmitter performs signal retransmission, the receiver (even if it is tracked and merged with the previously transmitted data block) may still be unable to decode the corresponding data block.
- the technique according to the present disclosure is made to solve signal retransmission in superimposed coded transmission, and embodiments of the present disclosure will be specifically described below.
- the receiver may be a base transceiver station, such as an eNB
- the multiple transmitters may be mobile stations, such as user equipment.
- FIG. 1 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to an embodiment of the present disclosure.
- the device may for example be included in the base station or may be located on the base station side.
- the apparatus 100 may include a transmitting unit 102, a receiving unit 104, and a processing unit 106. Functional configuration examples of the respective units will be described in detail below.
- the sending unit 102 can be configured to include at least a first user device and a second user device
- the user equipments transmit a first allocation signal synthesized using superposition coding, the first allocation signal comprising at least a first power signal portion for the first user equipment and a second power signal portion for the second user equipment.
- the base station sends a signal synthesized by using the superposition coding to the two user equipments of the first user equipment and the second user equipment as an example, but it should be understood that the base station can simultaneously provide three or more user equipments.
- the signal synthesized using the superposition coding is transmitted, and the technique of the present disclosure also applies to this case.
- the first power signal portion herein refers to a signal portion carrying a first user equipment target data block transmitted to the first user equipment, for example, the first power
- the second power signal portion refers to, for example, the second power to the second.
- the first power may be greater than the second power or may be less than the second power according to the radio conditions of the first user equipment and the second user equipment.
- the receiving unit 104 can be configured to receive a retransmission request from at least one of the first user equipment and the second user equipment. In case at least one of the first user equipment and the second user equipment does not decode the respective data according to the first allocation signal, at least one of the first user equipment and the second user equipment may send a retransmission request to the base station , request a signal retransmission.
- Processing unit 106 can be configured to process the first power signal portion and the second power signal portion with a predetermined processing coefficient to obtain a second distribution signal in response to the retransmission request.
- the sending unit 102 may be further configured to send a second allocation signal to the first user equipment and the second user equipment to combine the first allocation signal and the second allocation signal by the first user equipment and the second user equipment to Data for the first user device and data for the second user device are obtained separately.
- the base station is described herein to simultaneously transmit a retransmission signal to both the first user equipment and the second user equipment in the retransmission, the present invention also intends to provide that the base station only re-applies to the user equipment that issues the retransmission request.
- An example of sending its signal For convenience of description, the case where the base station transmits a retransmission signal to all devices after receiving the retransmission request is described as an example, and the base station only transmits the signal to the user equipment that issues the retransmission request.
- a special case of the case where the power signal portion of the user equipment that does not transmit the retransmission request is 0 in the retransmission signal is not described separately here.
- the example of the present invention performs specific processing at the time of retransmission but still uses the same transmission resource to retransmit the first and second user equipments by using the superposition coding, thereby greatly improving resource utilization efficiency and ensuring a certain degree of weight.
- the success rate of transmission, this performance gain will become more apparent in the case of more user equipment participating in the overlay transmission.
- one of the first power signal portion and the second power signal portion is attenuated or cancelled in the combined first and second distribution signals.
- the apparatus 100 adjusts the signal portion for the first user equipment and the signal portion for the second user equipment on the same transmission resource before performing the retransmission of the superposition coding.
- the interaction relationship for example, if the signal portion for the first user equipment and the signal portion for the second user equipment are transmitted on the same transmission resource in the previous transmission in the last transmission, then in this retransmission, the device 100, after the signal part of the first user equipment is subtracted from the signal part for the second user equipment, and transmitted on the same retransmission resource, then the received signal is merged on the receiving user equipment end. That is, the signal portion for other user equipment that can be implemented as interference is weakened.
- the predetermined processing coefficient may be determined based on a Hadamard matrix.
- the predetermined processing coefficient may be referred to as a "layer time code matrix", the horizontal dimension of the matrix represents the maximum number of retransmissions, and the vertical dimension represents the number of data streams (corresponding to user equipment),
- the layer time code matrix can be expressed, for example, as follows:
- the wireless channel in which the first user equipment is located is weak (eg, located far away), the wireless channel in which the second user equipment is located is strong (eg, relatively close).
- the Hadamard matrix A used by the base station with a layer time code matrix of 2 ⁇ (R + 1) (wherein R +1 represents the maximum number of transmissions) can be obtained by repeating a 2 ⁇ 2 Walsh matrix.
- the first row of the matrix includes predetermined coefficients for the first user equipment for each number of retransmissions
- the second row of the matrix includes predetermined coefficients for the second user equipment for each retransmission number. It is assumed that the downlink channels between the base station and the first and second user equipments are h F,0 and h N,0 respectively when the initial transmission is performed.
- the power allocated by the base station to the data block transmissions of the two user equipments according to the attenuation of h F,0 and h N,0 is p F,0 and p N,0 ,p F,0 >p N,0 .
- n F, 0 is additive noise when the first user equipment first receives.
- n N,0 is the additive noise when the first user equipment first receives.
- the first user equipment will receive the second power signal portion after receiving x 0 Considered as part of the noise, demodulate and self-check y F,0 according to h F,0 and p F (eg, by cyclic redundancy check CRC).
- the second user equipment After receiving the x 0 , the second user equipment first demodulates and self-tests according to h N,0 and p F to y N,0 to obtain b F , and then recovers the interference signal according to b F Then remove the interference signal in y N,0 use Demodulation and self-test are performed according to h N,0 and p N,0 .
- the base station If the first and second user equipment self-test data blocks are received correctly, the base station is notified to transmit the corresponding next data block, for example, the first and second user equipments respectively send a 1-bit acknowledgement (ACK) to the base station through the respective uplink channels. )information. After transmitting the data block, the base station waits for the user equipment to confirm the data block of the transmission, and performs the next data block transmission after receiving the confirmation.
- ACK 1-bit acknowledgement
- the base station may be notified to perform data block retransmission, for example, the first and/or the second user equipment pass the respective uplink channel.
- One bit of non-acknowledgement (NACK) information is transmitted to the base station as a retransmission request.
- the base station After receiving the retransmission request, the base station optionally re-distributes the powers of the data blocks of the two user equipments according to the attenuation of the downlink channels h F,1 and h N,1 as p F,1 and p N respectively.
- the device 100 may, for example, generate a complete layer time code matrix in advance, and associate each row with the data stream of each user equipment, and each column corresponds to each retransmission number, under the corresponding number of retransmissions.
- the predetermined coefficients contained in the corresponding columns are taken out therefrom to conveniently process the data streams of the respective user equipments.
- the apparatus 100 may also process only the current number of retransmissions and the user equipment involved in the retransmission to generate corresponding coefficients in real time.
- the signal received by the first user equipment for the first retransmission (second transmission) can be characterized as:
- h F,1 is the channel when the first user equipment retransmits for the first time
- n F,1 is the additive noise when the first user equipment retransmits for the first time
- h N,1 is the channel when the second user equipment retransmits for the first time
- n N,1 is the additive noise when the second user equipment retransmits for the first time
- the time interval between the retransmission and the last transmission is very small, and the channel conditions of the base station to the first and second user equipments can be ignored, and the transmission power used for the two transmissions remains unchanged.
- the first user equipment is based on two
- the y F,0 and y F,1 received in the secondary downlink data transmission are forward merged, and the forward combined signals are:
- the signal portion with respect to the second user equipment is eliminated, and the signal portion with respect to the first user equipment is enhanced, so that the first user equipment can decode its target data block.
- the second user equipment performs negative merge on y N,0 and y N,1 respectively received in the two downlink data transmissions, and the signals after the negative merge are:
- y N y N,0 -y N,1
- the signal portion with respect to the first user equipment is eliminated, and the signal portion with respect to the second user equipment is enhanced, so that the second user equipment can decode its target data block.
- the first user equipment performs y F,0 and y F,1 respectively received based on the two downlink data transmissions as follows:
- the forward merge, the signal after the forward merge is:
- y F,0 and y F,1 are multiplied by specific parameters before being merged in the forward direction. These specific parameters help to use mathematical means to enhance d F in the case of channel and power changes. Decrease d N . It can be understood that those skilled in the art can also design other specific parameters according to the idea of the present invention to pre-process the y F,0 and y F,1 before the combination to achieve the same purpose, for example, removing the part of the above formula about power, The invention is not mentioned in this example. Then, the first user equipment demodulates and self-tests the yF to obtain the target data stream bF.
- the second user equipment first performs negative merge based on y N,0 and y N,1 , and the signal after the negative merge is
- d N is enhanced and the interference power of d F is weakened.
- the second user equipment y 'N demodulate the self-test, attempts to obtain the target data stream b N.
- the second user equipment may also perform forward combining based on y N,0 and y N,1 , and the forward combined signal is
- the second user equipment demodulates and self-tests y" N to obtain b F , and then removes the interference signal in y ' N Demodulation and self-test of d N are performed to obtain b N .
- the second user equipment also can do first combined to give the positive y "N and b N obtained according to the above-described decoding method, in the case of not re-do successfully decoded combined to give a negative y 'N b N further decoding.
- the base station not only notifies the allocated power of the first user equipment DF but also the allocated power of the second user equipment signal portion d N .
- the first user equipment performs an enhanced merge of d F based on y F,0 and y F,1 to eliminate d N interference,
- d F is enhanced and the interference of d N is eliminated.
- the first user equipment then demodulates and self-tests y F to obtain a target data stream b F .
- the second user equipment first performs a negative merge based on y N,0 and y N,1 to eliminate d F interference and enhance d N :
- d N is enhanced, and the interference power of d F is eliminated.
- the second user equipment y 'N demodulate the self-test, attempts to obtain the target data stream b N.
- the forward combining is performed based on y N,0 and y N,1 to eliminate d N interference and enhance d F , and the forward combined signal is:
- d F is enhanced, and the interference of d N is eliminated.
- the second user equipment performs negative merge based on y N, 0 and y N, 1 , and the signal after the negative merge is
- the second user equipment demodulates and self-tests y" N to obtain b F , and then removes the interference signal in y '" N Demodulation and self-test of d N are performed.
- the first and second user equipments know the transmit powers p F and p N , for example, the base station indicates the transmit power p F to the first and second user equipments via control signaling.
- the user equipment may estimate the channels h F and h N according to, for example, a cell-specific reference signal (CRS), a channel state indication-reference signal (CSI-RS), thereby solving corresponding data b F or b N .
- CRS cell-specific reference signal
- CSI-RS channel state indication-reference signal
- the base station can only send the data block for the first user equipment according to the predetermined coefficient next time (for example, P will be N, 1 is set to 0), the first user equipment may attempt to re-send the retransmission alone, according to the corresponding layer time code [A (0, 0), A (0, 1)]
- the signals received twice before and after are forward merged. Since the signal portion of the first user equipment is enhanced in the combined signal, the possibility that the first user equipment decodes its data is greatly improved.
- the base station can also simultaneously transmit data blocks for the first user equipment and the second user equipment as in the above manner, and eliminate the interference signal portion by the above combining manner.
- the base station can only send the data block for the second user equipment according to the predetermined coefficient for the next time, the second user.
- the device may perform negative merge on the signals received twice before and after according to the layer time code [A(1,0), A(1,1)] corresponding to the retransmission failure of the retransmission. Since the signal portion of the second user equipment is enhanced in the combined signal, the likelihood that the second user equipment decodes its data is greatly improved.
- the base station can also simultaneously transmit data blocks for the first user equipment and the second user equipment as in the above manner, and eliminate the interference signal portion by the above combining manner.
- the base station may simultaneously transmit the data blocks for the first user equipment and the second user equipment in the same manner as described above, and adopt the foregoing combining manner. To eliminate the interference signal part.
- the user equipment may have a plurality of combined decoding schemes.
- the second user equipment in the previous paragraph can also perform forward combining on the signals received twice before and after to eliminate d N , and back up the target data d N after decoding d F first, or combine these in a specific order.
- the decoding scheme is executed step by step, and will not be enumerated here for the sake of brevity.
- the above retransmission process can be repeated to the maximum limit of user data retransmission. If the demodulation still fails, the transmission is declared to be aborted and the transmission is abandoned.
- the limitation of the number of data retransmissions can be configured by the base station, for example, by the base station, and is indicated by signaling to each user equipment.
- the present invention can apply the maxHARQ-Tx maximum retransmission times configured by Radio Resource Control (RRC).
- RRC Radio Resource Control
- the matrix elements of the layer time code matrix determined based on the Hadamard matrix are 1 or -1, the elements herein may also be other elements than 1 or -1. As long as it can be realized in the combined signal, one of the first power signal portion and the second power signal portion is weakened or cancelled.
- the addition or subtraction of the forward or negative merge operation is performed at the first user device and the second user device, respectively, but it is also possible to The device performs an addition or subtraction of the forward or negative merge operation, so that the data corresponding to the first power signal portion or the second power signal portion can be decoded first, and then the data corresponding to the other power signal portion is derived accordingly. .
- the processing unit 106 may be further configured to adjust the transmit power of at least one of the first power signal portion and the second power signal portion to obtain a second distribution signal.
- the processing unit 106 may be heavy Transmitting further increases the transmit power of the first power signal portion and correspondingly reduces the transmit power of the second power signal portion, such that the first user equipment and the second user equipment can be based on the first distribution signal and the second distribution signal
- the combined signal first decodes the data corresponding to the first power signal portion, and then derives the data corresponding to the second power signal portion by nonlinear interference cancellation such as serial interference cancellation.
- the transmitting unit 102 may be further configured to send a merge indication to the first user equipment and the second user equipment indicating how to perform the merge operation, respectively, to be first by the first user equipment and the second user equipment according to the merge indication
- the distribution signal and the second distribution signal are combined.
- the sending unit 102 may notify the user equipment by including the merge indication in high layer signaling (eg, RRC signaling, MAC layer signaling, etc.), and the merge indication may include the layer time code described above.
- the predetermined processing coefficient adopted by the first user equipment and the second user equipment for the current transmission base station may be notified by physical layer signaling (for example, downlink control information DCI) or the like. Add or subtract merge operations, etc.
- the merge indication is included in the physical layer signaling
- the signaling can be transmitted through a Physical Downlink Control Channel (PDCCH), and in this case has better time variation.
- PDCCH Physical Downlink Control Channel
- the base station side and the user equipment side For example, the knowledge of the layer time code matrix is shared in advance, and the first row in the code matrix of the layer corresponds to the retransmission processing coefficient of the remote user equipment, and the second row corresponds to the retransmission of the closer user equipment.
- the processing coefficient in this example, the memory of the user equipment pre-stores the layer time code matrix, and the user equipment can determine whether it is farther or closer, for example according to the transmission power of the two user equipments indicated by the base station respectively.
- the user equipment (larger power, smaller power) is used to read the corresponding predetermined coefficients in the layer time code matrix for the merge operation.
- the merging indication may be to perform a merging operation to enhance the higher power signal portion of the first power signal portion and the second power signal portion. That is, as described above, for the first power signal portion described above And the second power signal portion If the first power signal portion is greater than the second power signal portion, the merge indication may be to the first allocation signal at the first user equipment and the second user equipment And second distribution signal Performing an addition and combining operation to enhance the first power signal portion, so that the data corresponding to the first power signal portion can be decoded first at the first user equipment and the second user equipment, and then pushed out by, for example, serial interference cancellation. The data corresponding to the second power signal portion.
- the merge indication may be to first allocate signals at the first user equipment and the second user equipment.
- second distribution signal Performing a subtraction combining operation to enhance the second power signal portion, so that the data corresponding to the second power signal portion can be decoded first at the first user equipment and the second user equipment, and then pushed out by, for example, serial interference cancellation.
- the data corresponding to the first power signal portion may be to first allocate signals at the first user equipment and the second user equipment.
- the merge indication may be a performing merge operation to enhance the power signal portions of the first power signal portion and the second power signal portion for the first user equipment and the second user equipment, respectively. That is, the base station may instruct the first user equipment and the second user equipment to perform respective combining operations, respectively, to enhance the power signal portion corresponding to the respective target data block.
- the merge indication may be optional. That is, the base station may not send a merge indication to the user equipment, and the user equipment may perform a default merge operation according to the general situation (for example, adding and combining operations) If the corresponding data cannot be decoded according to the default merge operation, the subtraction merge operation can be performed again. In other words, the user equipment can also decide for itself how to perform the merge operation. In this way, signaling overhead can be reduced.
- FIG. 2 is a block diagram showing a functional configuration example of a device on the user device side in a wireless communication system according to another embodiment of the present disclosure.
- the device may be located in the user equipment or may be located on the user equipment side.
- the apparatus 200 may include a receiving unit 202, a processing unit 204, and a transmitting unit 206. Functional configuration examples of the respective units will be described in detail below.
- the receiving unit 202 can be configured to receive a first allocation signal from the base station, wherein the first allocation signal is synthesized using superposition coding and includes at least a first power signal portion for the first user equipment and a second user equipment unit Two power signal parts.
- Processing unit 204 can be configured to derive data for the first user device based on the first allocation signal. Specifically, for example, the processing unit 204 may obtain data for the first user equipment from the first distribution signal by de-interference reception, demodulation, self-test, and the like.
- the processing unit 204 may not correctly decode the corresponding data according to the first allocation signal.
- the transmitting unit 206 can be configured to send a retransmission request to the base station if the processing unit 204 does not obtain data for the first user equipment according to the first allocation signal, so that the base station can send the first user equipment The second distribution signal.
- the receiving unit 202 can be further configured to receive a second allocation signal from the base station, the second allocation signal being a retransmission request by the base station in response to at least one of the first user equipment and the second user equipment, with a predetermined processing coefficient pair
- the first power signal portion and the second power signal portion are processed to obtain.
- For the specific process of obtaining the second distribution signal refer to the description of the corresponding position above, which is not repeated here.
- the processing unit 204 may be further configured to combine the first distribution signal and the second distribution signal to attenuate or cancel one of the first power signal portion and the second power signal portion of the combined signal, thereby Obtain data for the first user device.
- the processing unit 204 may directly decode the data corresponding to the first power signal portion by performing a merging operation to attenuate or eliminate the second power signal portion, or may also decode the first one by performing a merging operation.
- a higher power signal portion e.g., a second power signal portion
- indirectly obtaining data corresponding to the first power signal portion by nonlinear interference cancellation such as serial interference cancellation based on the result of the combining.
- the processing unit 204 may be further configured to combine the first distribution signal and the second distribution signal to enhance the higher power signal portion of the first power signal portion and the second power signal portion to decode the comparison first After the data corresponding to the high power signal portion, the data corresponding to the lower power signal portion is derived by nonlinear interference cancellation such as serial interference cancellation.
- nonlinear interference cancellation such as serial interference cancellation.
- processing unit 204 may be further configured to combine the first allocation signal and the second allocation signal to enhance the first power signal portion for the first user equipment.
- similar processing can be performed on the second user equipment side. That is, the processing unit 204 of the user equipment can decide for itself how to perform the merging operation to enhance the power signal portion corresponding to the target data block of the user equipment, so that the desired target data can be directly obtained.
- the receiving unit 206 may further receive a merge indication from the base station, such that the processing unit 204 may further apply the first allocation signal and the first according to the merge indication.
- the second allocation signal performs a corresponding merge operation (eg, addition or subtraction merge).
- the merge indication may be included, for example, in higher layer signaling (eg, RRC signaling, MAC layer signaling, etc.) or physical layer signaling (eg, DCI).
- the merge indication may not necessarily be different for each user equipment, respectively, but the merge indication may also be to perform a merge operation to enhance higher power in the first power signal portion and the second power signal portion. The signal portion or the portion of the power signal corresponding to the target data block of each user equipment is enhanced.
- the processing unit 204 may be further configured to estimate the channel state (here h0) based on the CRS or CSI-RS from the base station, and based on the transmit power and channel state To solve the corresponding data.
- FIG. 3 is a flowchart illustrating an example of a signaling interaction procedure for downlink transmission, according to an embodiment of the present disclosure.
- step S31 the base station first defines a layer time code matrix according to the number of data streams and the maximum number of retransmissions. Then, in step S32, the base station indicates to the user equipment its corresponding data stream sequence number. Next, in step S33, the base station determines the layer time code parameter used for the transmission of the data block according to the retransmission sequence number and the data stream sequence number, and uses the parameter to weight the modulated data block. For the initial transmission, the retransmission sequence number can be defined as 0. Then, in step S34, the base station calculates the transmission power of each data block, performs power adjustment on the weighted data block, and superimposes the power-adjusted data block in step S35.
- step S36 the base station transmits the superimposed signal to the user equipment.
- the user equipment After receiving the superimposed signal, the user equipment performs demodulation and de-interference sequencing on the received data block in step S37, performs serial interference cancellation demodulation, and performs CRC self-test on the demodulated data in step S38. .
- step S39 when there is more than one retransmission, for the data block that is not correctly demodulated, the user equipment performs linear combination based on the principle that the received power is positively superimposed according to the layer time code corresponding thereto, and performs The crosstalk interference cancels the demodulation and self-test, and transmits the self-test result to the base station in step S310.
- step S311 if the base station determines that the data block needs to be retransmitted, the base station increments the corresponding retransmission sequence number, and repeatedly performs steps S33 to S310 to retransmit the data block; otherwise, the base station resets the retransmission sequence number to 0, and repeats the steps. S33 to S310, and send a new data block.
- the above signaling interaction process is merely an example and not a limitation. According to the above description with reference to FIG. 1 and FIG. 2, the above signaling interaction process may be modified. For example, the process of performing transmission power adjustment on the data block in step S34 is optional, so this step can be omitted.
- the step of transmitting a merge indication by the base station to the user equipment may also be added, so that the user equipment does not always perform the forward merge operation and demodulates the signal by nonlinear interference cancellation as in step S39, but may according to the merge indication A corresponding forward or negative merge operation is performed to cancel or attenuate the interfering signal portion, thereby demodulating the corresponding data signal.
- the pre-processing coefficients are defined here in the form of a layer time code matrix
- the base station side may not pre-define the layer time code matrix, but process the retransmission signal according to the actual reception condition.
- the base station side may not pre-define the layer time code matrix, but process the retransmission signal according to the actual reception condition.
- the device may be located in the base station or may be located on the base station side.
- the apparatus 400 may include a receiving unit 402, a processing unit 404, and a transmitting unit 406. Functional configuration examples of the respective units will be described in detail below.
- the receiving unit 402 can be configured to receive a first allocation signal, the first allocation signal including at least a first power signal portion and a second power signal transmitted by the first user equipment and the second user equipment on the same first wireless transmission resource section. Specifically, the first user equipment and the second user equipment send respective signals to the base station on the same time-frequency resource, so that the first allocation signal received at the base station end is equivalent to the superposition of signals from the two user equipments. .
- Processing unit 404 can be configured to derive data from the first user device and data from the second user device, respectively, based on the first distribution signal.
- the processing unit 404 may not be able to correctly resolve data from the first user equipment and the second user equipment based solely on the first allocation signal. Accordingly, the transmitting unit 406 can be configured to, when the processing unit 404 does not successfully obtain data from at least one of the first user device and the second user device according to the first allocation signal, to the first user device and the second user The device sends a retransmission request.
- the base station may not send a retransmission request to the user equipment, so that the power signal portion from the user equipment is 0 in the retransmission.
- the possibility of successfully demodulating data from another user equipment is also small, so it is usually required to simultaneously transmit to both user equipments.
- the request is retransmitted, but the case where a retransmission request is sent only to one of the user devices is not excluded.
- the base station sends a retransmission request to both user equipments as an example, but the case where the retransmission request is not sent to one of the user equipments is equivalent to the power from the user equipment in the retransmission.
- the signal portion is a special case of 0, which will not be described separately here.
- the receiving unit 402 can further receive the second allocation signal, the second allocation signal can include at least the first user equipment and the second user equipment in the same second wireless transmission in response to the retransmission request
- the third power signal portion and the fourth power signal portion transmitted on the resource, the third power signal portion and the fourth power signal portion are obtained by processing the first power signal portion and the second power signal portion with predetermined processing coefficients.
- the corresponding third power signal portion or fourth power signal portion may be zero.
- Processing unit 404 can then combine the first allocation signal and the second allocation signal to obtain data from the first user device and the second user device, respectively.
- the first power signal portion and the third power signal portion cancel or weaken each other, or the second power signal portion and the fourth power signal portion cancel or weaken each other .
- the downlink transmission is basically the same, and will not be described here.
- processing unit 404 can further perform nonlinear interference cancellation based on the combined results.
- data from one of the first user equipment and the second user equipment is solved by the merging operation as described above, data from another user equipment can be derived by, for example, serial interference cancellation.
- the respective transmit powers of the first power signal portion, the second power signal portion, the third power signal portion, and the fourth power signal portion are respectively determined by the processing unit 404 of the base station according to the current radio condition, and are transmitted by the transmitting unit 406 to The first user equipment and the second user equipment send a power indication to notify the first user equipment and the second user equipment of the determined transmission power, so that the first user equipment and the second user equipment may send the first A power signal portion, a second power signal portion, a third power signal portion, and a fourth power signal portion.
- the transmit power may also be predetermined without the need for the base station to determine, such that the user equipment may utilize the predetermined transmit power to transmit its data to the base station.
- the processing unit 404 can be further configured to determine the first wireless transmission resource and the second wireless transmission resource
- the transmitting unit 406 can be further configured to send the resource indication to the first user equipment and the second user equipment to The first wireless transmission resource and the second wireless transmission resource are indicated.
- the first user equipment and the second user equipment may also transmit respective data on predetermined wireless transmission resources without determining by the base station.
- processing unit 404 can be further configured to determine a predetermined processing coefficient and send a single The element 406 can transmit the determined predetermined processing coefficient to the first user equipment and the second user equipment, such that the first user equipment and the second user equipment respectively perform the first power signal portion and the second power signal portion with predetermined processing coefficients. Processing to obtain a third power signal portion and a fourth power signal portion.
- the predetermined processing coefficient may also be predetermined, without determining the base station.
- the foregoing power indication, resource indication, and predetermined processing coefficients may be included in an uplink grant signaling (UL grant) sent by the base station through the PDCCH.
- UL grant uplink grant signaling
- FIG. 5 is a block diagram showing a functional configuration example of an apparatus in a wireless communication system according to still another embodiment of the present disclosure.
- the device can be located in the user device or on the user device side.
- the apparatus 500 may include a transmitting unit 502, a receiving unit 504, and a processing unit 506. Functional configuration examples of the respective units will be described in detail below.
- the transmitting unit 502 can be configured to transmit, at the first transmit power, a first power signal portion to the base station on a first wireless transmission resource that is the same as the wireless transmission resource of the second user equipment that transmits the second power signal portion, where the second user equipment
- the second power signal portion can be transmitted at the second transmit power.
- the signal received at the base station is equivalent to a composite signal in which the first power signal portion and the second power signal portion are superimposed.
- Receiving unit 504 can be configured to receive a retransmission request from a base station.
- the base station side does not successfully obtain data from at least one of the first user equipment and the second user equipment according to the above superimposed composite signal, the base station may send a retransmission request to the first user equipment and the second user equipment.
- Processing unit 506 can be configured to process the first power signal portion with a predetermined processing coefficient to obtain a third power signal portion in response to the retransmission request.
- the second user equipment can also process the second power signal portion with a predetermined processing coefficient to obtain a fourth power signal portion in response to the retransmission request.
- the sending unit 504 may be further configured to send, at the third transmit power, a third power signal part to the base station on the second wireless transmission resource that is the same as the wireless transmission resource of the fourth user equipment part to send the fourth power signal part, thereby the base station may
- the interference signal portion from other user equipment is eliminated by combining the two transmitted signals. That is, after combining at the base station, the first power signal portion and the third power signal portion are weakened or canceled each other, or the second power signal portion and the fourth power signal portion are weakened or canceled each other.
- the power of the user equipment for transmitting the data signal, the wireless transmission resource for transmitting the data signal, and the predetermined processing coefficient for processing the retransmission signal may be determined by the base station, and the first transmission power and the third
- the transmit power may be included in a power indication from the base station
- the first radio transmission resource and the second radio transmission resource may be included in a resource indication from the base station
- the power indication, the resource indication, and the predetermined processing coefficient may all be included at the base station In the uplink grant signaling of the PDCCH transmission.
- FIG. 6 is a flowchart illustrating an example of a signaling interaction procedure for uplink transmission, according to an embodiment of the present disclosure.
- step S61 the base station pre-defines a layer time code matrix. Then, in step S62, the base station indicates to the user equipment the data stream sequence number corresponding thereto. In step S63, the base station calculates the transmission power of each user equipment to transmit its data block, and instructs the user equipment to its corresponding transmission power in step S64. In step S65, the user equipment determines the layer time code parameter used for the data block transmission according to the retransmission sequence number and the data stream sequence number, and weights the modulated data block using the layer time code parameter. For the initial transmission, the retransmission sequence number can be 0.
- step S66 the user equipment performs power adjustment on the weighted data block according to the transmission power indication from the base station, and transmits the data block to the base station in step S67.
- step S68 the base station performs demodulation and de-interference sequencing on the received data block, performs serial interference cancellation demodulation, and performs self-test on the demodulated data in step S69.
- step S610 when there is more than one retransmission, for the data block that is not correctly demodulated, the base station may perform linear combination according to the corresponding layer time code parameter and the principle of positive superposition based on the received power, and Perform serial interference cancellation demodulation.
- step S611 if the base station determines that the data block needs to be retransmitted, the base station increments the corresponding retransmission sequence number, and repeatedly performs steps S63 to S610, the user equipment retransmits the data block; otherwise, the base station resets the retransmission sequence number to 0. Steps S63 to S610 are repeatedly performed, and the user equipment transmits a new data block.
- the above signaling interaction process is merely an example and not a limitation, and a person skilled in the art may modify the signaling interaction process according to the principles of the present disclosure.
- the processing in step S63 is optional, and the transmission power used by the user equipment for data block transmission may also be predetermined.
- a forward or negative merge operation may be performed according to actual needs to reduce the calculation load.
- those skilled in the art can of course think of other variants of the above-mentioned signaling interaction process according to the principles of the present disclosure, which are not enumerated here, and such modifications are considered to fall within the scope of the present disclosure.
- embodiments of the present disclosure also provide methods in a wireless communication system.
- An example of the procedure of the method in the wireless communication system according to an embodiment of the present disclosure will be described in detail below with reference to FIGS. 7 through 10, respectively.
- FIG. 7 is a flowchart illustrating a process example of a method in a wireless communication system, according to an embodiment of the present disclosure. This method can be performed on the base station side.
- the method according to this embodiment may include transmitting step S702, receiving step S704, and processing step S706.
- the processing in each step will be described in detail below.
- the first allocation signal synthesized using the superposition coding may be transmitted to the plurality of user equipments including at least the first user equipment and the second user equipment, where the first allocation signal includes at least the first user equipment a first power signal portion and a second power signal portion for the second user equipment.
- the transmission power of the first power signal portion may be greater or smaller than the transmission power of the second power signal portion.
- At least one of the first user equipment and the second user equipment fails to obtain respective data according to the first allocation signal, at least one of the first user equipment and the second user equipment sends a retransmission request to the base station, Send the signal again with the request.
- receiving step S704 it can receive from A retransmission request fed back by at least one of the first user equipment and the second user equipment.
- the first power signal portion and the second power signal portion may be processed with a predetermined processing coefficient to obtain a second distribution signal in response to the retransmission request.
- the predetermined processing coefficient may be determined based on a Hadamard matrix, that is, the predetermined processing coefficient may be the above-mentioned "layer time code matrix".
- the second allocation signal may be further sent to the first user equipment and the second user equipment in the transmitting step S702, so that the first user equipment and the second user equipment may The received first distribution signal and second distribution signal respectively obtain respective data.
- one of the first power signal portion and the second power signal portion is attenuated or eliminated, so that the data can be greatly reduced when demodulating from another The interference of one user equipment, so that the possibility of successfully demodulating the corresponding data is greatly improved.
- FIG. 8 is a flowchart illustrating a process example of a method in a wireless communication system according to another embodiment of the present disclosure. This method can be performed on the user equipment side.
- the method according to this embodiment may include receiving step S802, processing step S804, and transmitting step S806.
- the processing in each step will be described in detail below.
- a first allocation signal from a base station may be received, the first allocation signal being synthesized using superposition coding and comprising at least a first power signal portion for the first user equipment and a second for the second user equipment Power signal section.
- process step S804 data for the first user equipment may be obtained according to the first allocation signal.
- a retransmission request may be transmitted to the base station without obtaining data for the first user equipment according to the first allocation signal.
- the base station may resend the data for the user equipment only to the user equipment that sends the retransmission request, or may resend the superimposed code to the two user equipments at the same time. Synthesize the signal.
- the second allocation signal from the base station is further received, where the second allocation signal is a retransmission request sent by the base station in response to at least one of the first user equipment and the second user equipment, with a predetermined processing coefficient pair A power signal portion and a second power signal portion are processed to obtain. It should be understood that in the case where the base station retransmits data only to the user equipment that issued the retransmission request, the portion of the second allocation signal related to another user equipment may be regarded as zero.
- the first allocation signal and the second allocation signal may be combined to obtain data for the first user equipment. Likewise, similar processing can be performed on the second user equipment side to obtain data for the second user equipment.
- the method described above with reference to FIG. 7 and FIG. 8 is a method performed on the base station side and the user equipment side, respectively, in the case of downlink transmission, and a method performed on the base station side and the user equipment side in the case of uplink transmission, respectively, will be described below.
- FIG. 9 is a flowchart illustrating a process example of a method in a wireless communication system according to still another embodiment of the present disclosure. This method can be performed on the base station side.
- the method according to this embodiment may include receiving step S902, processing step S904, and transmitting step S906.
- the processing in each step will be described in detail below.
- a first allocation signal may be received, where the first allocation signal includes at least a first power signal portion and a second power signal transmitted by the first user equipment and the second user equipment on the same first radio transmission resource. section. Since the first user equipment and the second user equipment transmit respective data to the base station on the same time-frequency resource, the signal received at the base station is equivalent to superimposing and encoding the data from the two user equipments. data.
- process step S904 data from the first user equipment and the second user equipment may be obtained according to the first allocation signal.
- the transmitting step S906 if the data from at least one of the first user equipment and the second user equipment is not successfully obtained according to the first allocation signal, retransmission is sent to the first user equipment and the second user equipment. request.
- the base station sends a retransmission request to both user equipments, and the base station can only treat the retransmission request to the user equipment that has not demodulated its data.
- a special case of the case where the retransmission data of the device is 0.
- the first user equipment and the second user equipment may again transmit their data to the base station on the same time-frequency resource.
- a second allocation signal is further received, the second allocation signal comprising at least a third power signal portion of the first user equipment and the second user equipment transmitting on the same second wireless transmission resource in response to the retransmission request
- the fourth power signal portion, the third power signal portion and the fourth power signal portion are obtained by processing the first power signal portion and the second power signal portion with predetermined processing coefficients.
- the predetermined processing coefficient may be predetermined, or may be notified to the user equipment after the base station determines.
- the first allocation signal and the second allocation signal may be combined to obtain data from the first user equipment and the second user equipment, respectively.
- FIG. 10 is a flowchart illustrating a process example of a method in a wireless communication system according to still another embodiment of the present disclosure. This method can be performed on the user equipment side.
- the method according to this embodiment may include transmitting step S1002, receiving step S1004, and processing step S1006.
- the processing in each step will be described in detail below.
- the first power signal portion may be transmitted to the base station on the first radio transmission resource that is the same as the radio transmission resource of the second user signal portion transmitted by the second user equipment with the first transmission power. That is, the first user equipment and the second user equipment transmit respective data to the base station on the same time-frequency resource.
- a retransmission request from the base station can be received.
- the first power signal portion may be processed with a predetermined processing coefficient in response to the retransmission request to obtain a third power signal portion.
- the second power signal portion may also be processed with a predetermined processing coefficient in response to the retransmission request to obtain a fourth power signal portion.
- the third power signal portion may be transmitted to the base station on the second radio transmission resource that is the same as the radio transmission resource of the fourth user signal portion transmitted by the second user equipment with the third transmission power. That is, the first user equipment and the second user equipment are on the same time-frequency resource.
- the secondary base station transmits respective third power signal portions and fourth power signal portions, such that the base station can eliminate or attenuate interference from other user equipment by combining the signals transmitted multiple times to successfully demodulate the corresponding User data.
- the transmit power used by each user equipment for transmitting signals, the wireless transmission resources used, and the predetermined processing coefficients used may be determined at the base station end and notified to the user equipment by the base station, for example, via uplink grant signaling.
- successful demodulation can be enabled by processing the retransmission signal in the superimposed transmission to attenuate or eliminate interference due to transmission with respect to other user equipments.
- the possibility of corresponding data is greatly improved, and at the same time, the throughput of the overlay transmission method can be improved.
- an electronic device which can include a transceiver and one or more processors, the one or more processors can be configured to perform the implementations described above in accordance with the present disclosure The method in the wireless communication system or the function of the corresponding unit.
- machine-executable instructions in the storage medium and the program product according to the embodiments of the present disclosure may also be configured to perform the method corresponding to the apparatus embodiment described above, and thus the content not described in detail herein may refer to the previous corresponding The description of the location will not be repeated here.
- a storage medium for carrying the above-described program product including machine-executable instructions is also included in the disclosure of the present invention.
- the storage medium includes but is not limited to a floppy disk, an optical disk, a magneto-optical disk, and a storage Cards, memory sticks, and more.
- the series of processes and devices described above can also be implemented in software and/or firmware.
- a program constituting the software is installed from a storage medium or a network to a computer having a dedicated hardware structure, such as the general-purpose personal computer 1100 shown in FIG. 11, which is installed with various programs.
- a program constituting the software is installed from a storage medium or a network to a computer having a dedicated hardware structure, such as the general-purpose personal computer 1100 shown in FIG. 11, which is installed with various programs.
- FIG. 11 is a block diagram showing an example structure of a personal computer which is an information processing device which can be employed in an embodiment of the present disclosure.
- a central processing unit (CPU) 1101 executes various processes in accordance with a program stored in a read only memory (ROM) 1102 or a program loaded from a storage portion 1108 to a random access memory (RAM) 1103.
- ROM read only memory
- RAM random access memory
- data required when the CPU 1101 executes various processes and the like is also stored as needed.
- the CPU 1101, the ROM 1102, and the RAM 1103 are connected to each other via a bus 1104.
- Input/output interface 1105 is also coupled to bus 1104.
- the following components are connected to the input/output interface 1105: an input portion 1106 including a keyboard, a mouse, etc.; an output portion 1107 including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 1108 , including a hard disk or the like; and a communication portion 1109 including a network interface card such as a LAN card, a modem, and the like.
- the communication section 1109 performs communication processing via a network such as the Internet.
- the drive 1110 is also connected to the input/output interface 1105 as needed.
- a removable medium 1111 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory or the like is mounted on the drive 1110 as needed, so that a computer program read therefrom is installed into the storage portion 1108 as needed.
- a program constituting the software is installed from a network such as the Internet or a storage medium such as the detachable medium 1111.
- such a storage medium is not limited to the removable medium 1111 shown in FIG. 11 in which a program is stored and distributed separately from the device to provide a program to the user.
- the detachable medium 1111 include a magnetic disk (including a floppy disk (registered trademark)), an optical disk (including a compact disk read only memory (CD-ROM) and a digital versatile disk (DVD)), and a magneto-optical disk (including a mini disk (MD) (registered trademark) )) and semiconductor memory.
- the storage medium may be a ROM 1102, a hard disk included in the storage portion 1108, or the like, in which programs are stored, and distributed to the user together with the device containing them.
- FIG. 12 is a block diagram showing a first example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied.
- the eNB 1200 includes one or more antennas 1210 and base station devices 1220.
- the base station device 1220 and each antenna 1210 may be connected to each other via an RF cable.
- Each of the antennas 1210 includes a single or multiple antenna elements, such as multiple antenna elements included in a multiple input multiple output (MIMO) antenna, and is used by the base station device 1220 to transmit and receive wireless signals.
- the eNB 1200 can include multiple antennas 1210.
- multiple antennas 1210 can be compatible with multiple frequency bands used by eNB 1200.
- FIG. 12 illustrates an example in which the eNB 1200 includes multiple antennas 1210, the eNB 1200 may also include a single antenna 1210.
- the base station device 1220 includes a controller 1221, a memory 1222, a network interface 1223, and a wireless communication interface 1225.
- the controller 1221 may be, for example, a CPU or a DSP, and operates various functions of higher layers of the base station device 1220. For example, controller 1221 generates data packets based on data in signals processed by wireless communication interface 1225 and communicates the generated packets via network interface 1223. The controller 1221 can bundle data from a plurality of baseband processors to generate bundled packets and deliver the generated bundled packets. The controller 1221 may have a logical function that performs control such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. This control can be performed in conjunction with nearby eNBs or core network nodes.
- the memory 1222 includes a RAM and a ROM, and stores programs executed by the controller 1221 and various types of control data such as a terminal list, transmission power data, and scheduling data.
- Network interface 1223 is a communication interface for connecting base station device 1220 to core network 1224. Controller 1221 can communicate with a core network node or another eNB via network interface 1223. In this case, the eNB 1200 and the core network node or other eNBs may be connected to each other through a logical interface such as an S1 interface and an X2 interface. Network interface 1223 may also be a wired communication interface or a wireless communication interface for wireless backhaul lines. If network interface 1223 is a wireless communication interface, network interface 1223 can use a higher frequency band for wireless communication than the frequency band used by wireless communication interface 1225.
- Wireless communication interface 1225 supports any cellular communication scheme such as Long Term Evolution (LTE) and LTE- Advanced) and providing a wireless connection to a terminal located in a cell of eNB 1200 via antenna 1210.
- Wireless communication interface 1225 may typically include, for example, baseband (BB) processor 1226 and RF circuitry 1227.
- the BB processor 1226 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and performs layers (eg, L1, Medium Access Control (MAC), Radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP)) Various types of signal processing.
- BB processor 1226 may have some or all of the above described logic functions.
- the BB processor 1226 may be a memory that stores a communication control program, or a module that includes a processor and associated circuitry configured to execute the program.
- the update program can cause the functionality of the BB processor 1226 to change.
- the module can be a card or blade that is inserted into the slot of the base station device 1220. Alternatively, the module can also be a chip mounted on a card or blade.
- the RF circuit 1227 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 1210.
- the wireless communication interface 1225 can include a plurality of BB processors 1226.
- multiple BB processors 1226 can be compatible with multiple frequency bands used by eNB 1200.
- the wireless communication interface 1225 can include a plurality of RF circuits 1227.
- multiple RF circuits 1227 can be compatible with multiple antenna elements.
- FIG. 12 illustrates an example in which the wireless communication interface 1225 includes a plurality of BB processors 1226 and a plurality of RF circuits 1227, the wireless communication interface 1225 may also include a single BB processor 1226 or a single RF circuit 1227.
- FIG. 13 is a block diagram showing a second example of a schematic configuration of an eNB to which the technology of the present disclosure may be applied.
- the eNB 1330 includes one or more antennas 1340, base station devices 1350, and RRHs 1360.
- the RRH 1360 and each antenna 1340 may be connected to each other via an RF cable.
- the base station device 1350 and the RRH 1360 can be connected to each other via a high speed line such as a fiber optic cable.
- Each of the antennas 1340 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used by the RRH 1360 to transmit and receive wireless signals.
- the eNB 1330 can include multiple antennas 1340.
- multiple antennas 1340 can be compatible with multiple frequency bands used by eNB 1330.
- FIG. 13 illustrates an example in which the eNB 1330 includes multiple antennas 1340, the eNB 1330 may also include a single antenna 1340.
- the base station device 1350 includes a controller 1351, a memory 1352, a network interface 1353, a wireless communication interface 1355, and a connection interface 1357. Controller 1351, memory 1352 and network interface 1353 The controller 1221, the memory 1222, and the network interface 1223 described with reference to FIG. 12 are the same.
- the wireless communication interface 1355 supports any cellular communication scheme, such as LTE and LTE-Advanced, and provides wireless communication to terminals located in sectors corresponding to the RRH 1360 via the RRH 1360 and the antenna 1340.
- Wireless communication interface 1355 can typically include, for example, BB processor 1356.
- the BB processor 1356 is identical to the BB processor 1226 described with reference to FIG. 12 except that the BB processor 1356 is connected to the RF circuit 1364 of the RRH 1360 via the connection interface 1357.
- the wireless communication interface 1355 can include a plurality of BB processors 1356.
- multiple BB processors 1356 can be compatible with multiple frequency bands used by eNB 1330.
- FIG. 13 illustrates an example in which the wireless communication interface 1355 includes a plurality of BB processors 1356, the wireless communication interface 1355 may also include a single BB processor 1356.
- connection interface 1357 is an interface for connecting the base station device 1350 (wireless communication interface 1355) to the RRH 1360.
- the connection interface 1357 may also be a communication module for connecting the base station device 1350 (wireless communication interface 1355) to the communication in the above-described high speed line of the RRH 1360.
- the RRH 1360 includes a connection interface 1361 and a wireless communication interface 1363.
- connection interface 1361 is an interface for connecting the RRH 1360 (wireless communication interface 1363) to the base station device 1350.
- the connection interface 1361 may also be a communication module for communication in the above high speed line.
- Wireless communication interface 1363 transmits and receives wireless signals via antenna 1340.
- Wireless communication interface 1363 can generally include, for example, RF circuitry 1364.
- the RF circuit 1364 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 1340.
- the wireless communication interface 1363 can include a plurality of RF circuits 1364.
- multiple RF circuits 1364 can support multiple antenna elements.
- FIG. 13 illustrates an example in which the wireless communication interface 1363 includes a plurality of RF circuits 1364, the wireless communication interface 1363 may also include a single RF circuit 1364.
- the transmitting unit and the receiving unit described by using FIGS. 1 and 4 can be implemented by the wireless communication interface 1225 and the wireless communication interface 1355 and/or the wireless communication interface 1363.
- At least a part of the functions of the processing unit in the apparatus at the base station end in the above wireless communication system can also be implemented by the controller 1221 and the controller 1351.
- FIG. 14 is a diagram showing a schematic configuration of a smartphone 1400 to which the technology of the present disclosure can be applied.
- the smart phone 1400 includes a processor 1401, a memory 1402, a storage device 1403, an external connection interface 1404, an imaging device 1406, a sensor 1407, a microphone 1408, an input device 1409, a display device 1410, a speaker 1411, a wireless communication interface 1412, and one or more An antenna switch 1415, one or more antennas 1416, a bus 1417, a battery 1418, and an auxiliary controller 1419.
- the processor 1401 may be, for example, a CPU or a system on chip (SoC), and controls functions of an application layer and another layer of the smart phone 1400.
- the memory 1402 includes a RAM and a ROM, and stores data and programs executed by the processor 1401.
- the storage device 1403 may include a storage medium such as a semiconductor memory and a hard disk.
- the external connection interface 1404 is an interface for connecting an external device such as a memory card and a universal serial bus (USB) device to the smart phone 1400.
- USB universal serial bus
- the image pickup device 1406 includes an image sensor such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image.
- Sensor 1407 can include a set of sensors, such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor.
- the microphone 1408 converts the sound input to the smartphone 1400 into an audio signal.
- the input device 1409 includes, for example, a touch sensor, a keypad, a keyboard, a button, or a switch configured to detect a touch on the screen of the display device 1410, and receives an operation or information input from a user.
- the display device 1410 includes screens such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display, and displays an output image of the smartphone 1400.
- the speaker 1411 converts the audio signal output from the smartphone 1400 into sound.
- the wireless communication interface 1412 supports any cellular communication scheme (such as LTE and LTE-Advanced) and performs wireless communication.
- Wireless communication interface 1412 may generally include, for example, BB processor 1413 and RF circuitry 1414.
- the BB processor 1413 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and performs various types of signal processing for wireless communication.
- the RF circuit 1414 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives a wireless signal via the antenna 1416.
- the wireless communication interface 1412 can be a chip module on which the BB processor 1413 and the RF circuit 1414 are integrated. As shown in FIG.
- the wireless communication interface 1412 can include a plurality of BB processors 1413 and a plurality of RF circuits 1414.
- FIG. 14 illustrates an example in which the wireless communication interface 1412 includes a plurality of BB processors 1413 and a plurality of RF circuits 1414, the wireless communication interface 1412 may also include a single BB processor 1413 or a single RF circuit 1414.
- the wireless communication interface 1412 can support another type of Wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless local area network (LAN) schemes.
- the wireless communication interface 1412 can include a BB processor 1413 and RF circuitry 1414 for each wireless communication scheme.
- Each of the antenna switches 1415 switches the connection destination of the antenna 1416 between a plurality of circuits included in the wireless communication interface 1412, such as circuits for different wireless communication schemes.
- Each of the antennas 1416 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used by the wireless communication interface 1412 to transmit and receive wireless signals.
- smart phone 1400 can include multiple antennas 1416.
- FIG. 14 illustrates an example in which smart phone 1400 includes multiple antennas 1416, smart phone 1400 may also include a single antenna 1416.
- smart phone 1400 can include an antenna 1416 for each wireless communication scheme.
- the antenna switch 1415 can be omitted from the configuration of the smartphone 1400.
- the bus 1417 stores the processor 1401, the memory 1402, the storage device 1403, the external connection interface 1404, the imaging device 1406, the sensor 1407, the microphone 1408, the input device 1409, the display device 1410, the speaker 1411, the wireless communication interface 1412, and the auxiliary controller 1419 with each other. connection.
- Battery 1418 provides power to various blocks of smart phone 1400 shown in FIG. 14 via feeders, which are partially shown as dashed lines in the figure.
- the secondary controller 1419 operates the minimum required function of the smartphone 1400, for example, in a sleep mode.
- the transmitting unit and the receiving unit described by using FIGS. 2 and 5 can be implemented by the wireless communication interface 1412. At least a portion of the functionality of the processing unit in the device at the user equipment side described above may also be implemented by the processor 1401 or the auxiliary controller 1419.
- a plurality of functions included in one unit in the above embodiment may be implemented by separate devices.
- a plurality of functions implemented by a plurality of units in the above embodiments may be implemented by separate devices, respectively.
- one of the above functions may be implemented by a plurality of units. Needless to say, such a configuration is included in the technical scope of the present disclosure.
- the steps described in the flowcharts include not only processes performed in time series in the stated order, but also processes performed in parallel or individually rather than necessarily in time series. Further, even in the step of processing in time series, it is needless to say that the order can be appropriately changed.
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Abstract
Description
Claims (31)
- 一种无线通信系统中的装置,所述装置包括:发送单元,被配置成向至少包括第一用户设备和第二用户设备的多个用户设备发送使用叠加编码合成的第一分配信号,所述第一分配信号至少包括针对所述第一用户设备的第一功率信号部分和针对所述第二用户设备的第二功率信号部分;接收单元,被配置成接收来自所述第一用户设备和所述第二用户设备中的至少一个反馈的重传请求;以及处理单元,被配置成响应于所述重传请求,以预定处理系数对所述第一功率信号部分和所述第二功率信号部分进行处理以得到第二分配信号,其中,所述发送单元进一步被配置成向所述第一用户设备和所述第二用户设备发送所述第二分配信号,由所述第一用户设备和所述第二用户设备对所述第一分配信号和所述第二分配信号进行合并以分别获得针对所述第一用户设备的数据和针对所述第二用户设备的数据。
- 根据权利要求1所述的装置,其中,在合并后的所述第一分配信号和所述第二分配信号中,所述第一功率信号部分和所述第二功率信号部分之一被减弱或抵消。
- 根据权利要求2所述的装置,其中,所述处理单元进一步被配置成对所述第一功率信号部分和所述第二功率信号部分中的至少一个的发射功率进行调整以得到所述第二分配信号。
- 根据权利要求1至3中任一项所述的装置,其中,所述发送单元进一步被配置成分别向所述第一用户设备和所述第二用户设备发送指示如何执行合并操作的合并指示,以由所述第一用户设备和所述第二用户设备根据所述合并指示对所述第一分配信号和所述第二分配信号进行合并。
- 根据权利要求4所述的装置,其中,所述合并指示包含在高层信令或物理层信令中。
- 根据权利要求4所述的装置,其中,所述合并指示为执行合并操作以增强所述第一功率信号部分和所述第二功率信号部分中的较高功率信号部分。
- 根据权利要求4所述的装置,其中,所述合并指示为执行合并操作, 以分别增强所述第一功率信号部分和所述第二功率信号部分中的分别针对所述第一用户设备和所述第二用户设备的功率信号部分。
- 根据权利要求1所述的装置,其中,所述预定处理系数是基于哈达玛矩阵来确定的。
- 一种无线通信系统中的装置,包括:接收单元,被配置成接收来自基站的第一分配信号,其中,所述第一分配信号是使用叠加编码合成的并且至少包括针对第一用户设备的第一功率信号部分和针对第二用户设备的第二功率信号部分;处理单元,被配置成根据所述第一分配信号得到针对所述第一用户设备的数据;以及发送单元,被配置成在所述处理单元根据所述第一分配信号没有得到针对所述第一用户设备的数据的情况下,向所述基站发送重传请求,其中,所述接收单元进一步被配置成接收来自所述基站的第二分配信号,所述第二分配信号是所述基站响应于所述第一用户设备和所述第二用户设备中的至少一个反馈的重传请求,以预定处理系数对所述第一功率信号部分和所述第二功率信号部分进行处理而获得的,以及其中,所述处理单元进一步被配置成对所述第一分配信号和所述第二分配信号进行合并,以获得针对所述第一用户设备的数据。
- 根据权利要求9所述的装置,其中,在合并后的所述第一分配信号和所述第二分配信号中,所述第一功率信号部分和所述第二功率信号部分之一被减弱或抵消。
- 根据权利要求9或10所述的装置,其中,所述接收单元还接收来自所述基站的指示如何进行合并操作的合并指示,并且所述处理单元进一步被配置成根据所述合并指示对所述第一分配信号和所述第二分配信号进行合并。
- 根据权利要求11所述的装置,其中,所述合并指示包含在高层信令或物理层信令中。
- 根据权利要求9或10所述的装置,所述处理单元进一步被配置成对所述第一分配信号和所述第二分配信号进行合并,以增强所述第一功率信号部分和所述第二功率信号部分中的较高功率信号部分。
- 根据权利要求9或10所述的装置,其中,所述处理单元进一步被配置成对所述第一分配信号和所述第二分配信号进行合并,以增强针对所述第一用户设备的第一功率信号部分。
- 根据权利要求9所述的装置,其中,所述处理单元进一步被配置成根据来自所述基站的小区特定参考信号CRS或信道状态指示-参考信号CSI-RS来估计信道状态,以获得针对所述第一用户设备的数据。
- 根据权利要求9所述的装置,其中,所述处理单元进一步被配置成根据所述合并的结果而执行非线性干扰消除。
- 一种无线通信系统中的装置,所述装置包括:接收单元,被配置成接收第一分配信号,所述第一分配信号至少包括第一用户设备和第二用户设备在相同的第一无线传输资源上传输的第一功率信号部分和第二功率信号部分;处理单元,被配置成根据所述第一分配信号得到分别来自所述第一用户设备和所述第二用户设备的数据;以及发送单元,被配置成在所述处理单元根据所述第一分配信号没有成功得到来自所述第一用户设备和所述第二用户设备中的至少一个的数据的情况下,向所述第一用户设备和所述第二用户设备发送重传请求,其中,所述接收单元进一步被配置成接收第二分配信号,所述第二分配信号至少包括所述第一用户设备和所述第二用户设备响应于所述重传请求在相同的第二无线传输资源上传输的第三功率信号部分和第四功率信号部分,所述第三功率信号部分和所述第四功率信号部分是以预定处理系数对所述第一功率信号部分和所述第二功率信号部分进行处理而获得的,以及其中,所述处理单元进一步被配置成对所述第一分配信号和所述第二分配信号进行合并以得到分别来自所述第一用户设备和所述第二用户设备的数据。
- 根据权利要求17所述的装置,其中,在合并后的所述第一分配信号和所述第二分配信号中,所述第一功率信号部分与所述第三功率信号部分相互抵消或减弱,或者所述第二功率信号部分与所述第四功率信号部分相互抵消或减弱。
- 根据权利要求17所述的装置,其中,所述处理单元进一步被配置成 确定所述第一功率信号部分、所述第二功率信号部分、所述第三功率信号部分和所述第四功率信号部分各自的发射功率,以及其中,所述发送单元进一步被配置成向所述第一用户设备和所述第二用户设备发送功率指示,以指示所确定的发射功率。
- 根据权利要求19所述的装置,其中,所述处理单元进一步被配置成确定所述第一无线传输资源和所述第二无线传输资源,并且所述发送单元进一步被配置成向所述第一用户设备和所述第二用户设备发送资源指示,以指示所述第一无线传输资源和所述第二无线传输资源。
- 根据权利要求20所述的装置,其中,所述处理单元进一步被配置成确定所述预定处理系数,并且所述发送单元进一步被配置成将所述预定处理系数发送到所述第一用户设备和所述第二用户设备。
- 根据权利要求21所述的装置,其中,所述功率指示、所述资源指示和所述预定处理系数包括在上行授权信令中。
- 根据权利要求17所述的装置,其中,所述处理单元进一步被配置成根据所述合并的结果而执行非线性干扰消除。
- 一种无线通信系统中的装置,所述装置包括:发送单元,被配置成以第一发射功率在与第二用户设备发送第二功率信号部分的无线传输资源相同的第一无线传输资源上向基站发送第一功率信号部分;接收单元,被配置成接收来自所述基站的重传请求;以及处理单元,被配置成响应于所述重传请求而以预定处理系数对所述第一功率信号部分进行处理以得到第三功率信号部分,其中,所述发送单元进一步被配置成以第三发射功率在与所述第二用户设备发送第四功率信号部分的无线传输资源相同的第二无线传输资源上向所述基站发送所述第三功率信号部分,所述第四功率信号部分是所述第二用户设备响应于所述重传请求以预定处理系数对所述第二功率信号部分进行处理而获得的。
- 根据权利要求24所述的装置,其中,所述第一发射功率和所述第三发射功率包括在从所述基站接收的功率指示中。
- 根据权利要求25所述的装置,其中,所述第一无线传输资源和所述第二无线传输资源包括在从所述基站接收的资源指示中。
- 根据权利要求26所述的装置,其中,所述功率指示、所述资源指示和所述预定处理系数包括在上行授权信令中。
- 一种无线通信系统中的方法,所述方法包括:发送步骤,用于向至少包括第一用户设备和第二用户设备的多个用户设备发送使用叠加编码合成的第一分配信号,所述第一分配信号至少包括针对所述第一用户设备的第一功率信号部分和针对所述第二用户设备的第二功率信号部分;接收步骤,用于接收来自所述第一用户设备和所述第二用户设备中的至少一个反馈的重传请求;以及处理步骤,用于响应于所述重传请求,以预定处理系数对所述第一功率信号部分和所述第二功率信号部分进行处理以得到第二分配信号,其中,在所述发送步骤中,还向所述第一用户设备和所述第二用户设备发送所述第二分配信号,由所述第一用户设备和所述第二用户设备对所述第一分配信号和所述第二分配信号进行合并以分别获得针对所述第一用户设备的数据和针对所述第二用户设备的数据。
- 一种无线通信系统中的方法,所述方法包括:接收步骤,用于接收来自基站的第一分配信号,其中,所述第一分配信号是使用叠加编码合成的并且至少包括针对第一用户设备的第一功率信号部分和针对第二用户设备的第二功率信号部分;处理步骤,用于根据所述第一分配信号得到针对所述第一用户设备的数据;以及发送步骤,用于在根据所述第一分配信号没有得到针对所述第一用户设备的数据的情况下,向所述基站发送重传请求,其中,在所述接收步骤中还接收来自所述基站的第二分配信号,所述第二分配信号是所述基站响应于所述第一用户设备和所述第二用户设备中的至少一个反馈的重传请求,以预定处理系数对所述第一功率信号部分和所述第二功率信号部分进行处理而获得的,以及其中,在所述处理步骤中还对所述第一分配信号和所述第二分配信号进行合并,以获得针对所述第一用户设备的数据。
- 一种无线通信系统中的方法,所述方法包括:接收步骤,用于接收第一分配信号,所述第一分配信号至少包括第一用户设备和第二用户设备在相同的第一无线传输资源上传输的第一功率信号部分和第二功率信号部分;处理步骤,用于根据所述第一分配信号得到分别来自所述第一用户设备和所述第二用户设备的数据;以及发送步骤,用于在根据所述第一分配信号没有成功得到来自所述第一用户设备和所述第二用户设备中的至少一个的数据的情况下,向所述第一用户设备和所述第二用户设备发送重传请求,其中,在所述接收步骤中还接收第二分配信号,所述第二分配信号至少包括所述第一用户设备和所述第二用户设备响应于所述重传请求在相同的第二无线传输资源上传输的第三功率信号部分和第四功率信号部分,所述第三功率信号部分和所述第四功率信号部分是以预定处理系数对所述第一功率信号部分和所述第二功率信号部分进行处理而获得的,以及其中,在所述处理步骤中,还对所述第一分配信号和所述第二分配信号进行合并以得到分别来自所述第一用户设备和所述第二用户设备的数据。
- 一种无线通信系统中的方法,所述方法包括:发送步骤,用于以第一发射功率在与第二用户设备发送第二功率信号部分的无线传输资源相同的第一无线传输资源上向基站发送第一功率信号部分;接收步骤,用于接收来自所述基站的重传请求;以及处理步骤,用于响应于所述重传请求而以预定处理系数对所述第一功率信号部分进行处理以得到第三功率信号部分,其中,在所述发送步骤中,还以第三发射功率在与所述第二用户设备发送第四功率信号部分的无线传输资源相同的第二无线传输资源上向所述基站发送所述第三功率信号部分,所述第四功率信号部分是所述第二用户设备响应于所述重传请求以预定处理系数对所述第二功率信号部分进行处理而获得的。
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