Electronic device and method in wireless communication network

Abstract

An electronic device and method in a wireless communication network are provided. The electronic device includes a circuit configured to: allocate a first transmission power to a first data signal of a first user device that is farther away from a plurality of user devices, and allocate a second transmission power to a second data signal of a closer user device; generate a first superimposed data signal by superimposing the first data signal on the second data signal; send the first superimposed data signal to the farther first user device and the closer user device using the same transmission resource; in response to unconfirmed hybrid automatic repeat request feedback from the closer user device, reallocate a third transmission power to the second data signal and reallocate a fourth transmission power to another data signal, and generate a second superimposed data signal by superimposing the second data signal on another data signal, the other data signal being the first data signal or the data signal of the farther second user device; and send the second superimposed data signal to the closer user device.

Description

[0001] This application is a divisional application of the invention patent application with the application date of August 14, 2015, application number 201510501585.X, and invention name “Device and method in wireless communication system”. Technical Field

[0002] The present disclosure relates to the field of wireless communication technology, and more specifically, to a device and method in a wireless communication system for solving interference signals in multiple transmissions in a multi-user superposition transmission (MUST) wireless communication system to effectively improve a data success reception rate and a throughput of multi-stream superposition transmission. Background Art

[0003] In the existing wireless communication system using multi-user superposition transmission, the base station superimposes the data streams of different users after allocating different transmission powers according to the user channels. The user equipment uses, for example, a serial interference elimination mechanism to eliminate interference from other user equipment and extract its own target data stream from the received superimposed data stream. If the extraction of the target data stream fails, the user equipment will notify the base station, and the base station will simply retransmit the data stream. If the retransmission is still superimposed transmission, there will still be interference from other users in the retransmitted data stream. In this way, if the user equipment simply superimposes and strengthens the data stream received again with the previously received data stream, although the received signal power is enhanced, the interference signal power may also be enhanced at the same time, resulting in a reduced possibility of extracting the target data stream through retransmission. Summary of the invention

[0004] A brief overview of the disclosure is given below in order to provide a basic understanding of certain aspects of the disclosure. However, it should be understood that this overview is not an exhaustive overview of the disclosure. It is not intended to identify the key or important parts of the disclosure, nor is it intended to limit the scope of the disclosure. Its purpose is simply to give certain concepts of the disclosure in a simplified form as a prelude to a more detailed description given later.

[0005] In view of the above problems, the purpose of the present disclosure is to provide a device and method in a wireless communication system that overcomes the shortcomings of the above-mentioned prior art, which can reduce interference from other users by performing predetermined processing on retransmission signals to improve the data reception success rate and the throughput of multi-stream superposition transmission.

[0006] According to one aspect of the present disclosure, a device in a wireless communication system is provided, the device comprising: a sending unit, configured to send a first allocation signal synthesized using superposition coding to a plurality of user devices including at least a first user device and a second user device, the first allocation signal comprising at least a first power signal portion for the first user device and a second power signal portion for the second user device; a receiving unit, configured to receive a retransmission request fed back from at least one of the first user device and the second user device; and a processing unit, configured to process the first power signal portion and the second power signal portion with a predetermined processing coefficient in response to the retransmission request to obtain a second allocation signal, wherein the sending unit is further configured to send a second allocation signal to the first user device and the second user device, and the first user device and the second user device combine the first allocation signal and the second allocation signal to obtain data for the first user device and data for the second user device, respectively.

[0007] According to a preferred embodiment of the present disclosure, in the combined first distribution signal and the second distribution signal, one of the first power signal portion and the second power signal portion is weakened or canceled.

[0008] According to another preferred embodiment of the present disclosure, the processing unit is further configured to adjust the transmission power of at least one of the first power signal part and the second power signal part to obtain the second allocation signal.

[0009] According to another preferred embodiment of the present disclosure, the sending unit is further configured to send a merging indication indicating how to perform a merging operation to the first user equipment and the second user equipment respectively, so that the first user equipment and the second user equipment merge the first allocation signal and the second allocation signal according to the merging indication.

[0010] According to another preferred embodiment of the present disclosure, the merging indication is included in high-layer signaling or physical-layer signaling.

[0011] According to another preferred embodiment of the present disclosure, the combining instruction is to perform a combining operation to enhance a higher power signal portion of the first power signal portion and the second power signal portion.

[0012] According to another preferred embodiment of the present disclosure, the combining instruction is to perform a combining operation to respectively enhance the power signal parts of the first power signal part and the second power signal part respectively for the first user equipment and the second user equipment.

[0013] According to another preferred embodiment of the present disclosure, the predetermined processing coefficient is determined based on a Hadamard matrix.

[0014] According to another aspect of the present disclosure, a device in a wireless communication system is also provided, the device 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 comprises at least a first power signal portion for a first user equipment and a second power signal portion for a second user equipment; a processing unit, configured to obtain data for the first user equipment according to the first allocation signal; and a sending 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 a second allocation signal from the base station, the second allocation signal being 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 fed back by at least one of the first user equipment and the second user equipment, and wherein the processing unit is further configured to merge the first allocation signal and the second allocation signal to obtain data for the first user equipment.

[0015] According to another aspect of the present disclosure, a device in a wireless communication system is also provided, the device comprising: a receiving unit, configured to receive a first allocation signal, the first allocation signal at least comprising a first power signal part and a second power signal part transmitted by a first user equipment and a second user equipment on the same first wireless transmission resource; a processing unit, configured to obtain data respectively from the first user equipment and the second user equipment according to the first allocation signal; and a sending unit, configured to send a retransmission request to the first user equipment and the second user equipment when the processing unit fails to successfully obtain data from at least one of the first user equipment and the second user equipment according to the first allocation signal, wherein the receiving unit is further configured to receive a second allocation signal, the second allocation signal at least comprising a third power signal part and a fourth power signal part transmitted by the first user equipment and the second user equipment on the same second wireless transmission resource in response to the retransmission request, the third power signal part and the fourth power signal part being obtained by processing the first power signal part and the second power signal part with a predetermined processing coefficient, and wherein the processing unit is further configured to merge the first allocation signal and the second allocation signal to obtain data respectively from the first user equipment and the second user equipment.

[0016] According to another aspect of the present disclosure, a device in a wireless communication system is also provided, the device comprising: a sending unit, configured to send a first power signal portion to a base station at a first transmission power on a first wireless transmission resource that is the same as the wireless transmission resource on which a second user equipment sends a second power signal portion; a receiving unit, configured to receive a retransmission request from the base station; and a processing unit, configured to process the first power signal portion with a predetermined processing coefficient in response to the retransmission request to obtain a third power signal portion, wherein the sending unit is further configured to send the third power signal portion to the base station at a third transmission power on a second wireless transmission resource that is the same as the wireless transmission resource on which the second user equipment sends a fourth power signal portion, and 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.

[0017] According to another aspect of the present disclosure, a method in a wireless communication system is also provided, the method comprising: a sending step for sending a first allocation signal synthesized using superposition coding to a plurality of user devices including at least a first user device and a second user device, the first allocation signal comprising at least a first power signal portion for the first user device and a second power signal portion for the second user device; a receiving step for receiving a retransmission request fed back from at least one of the first user device and the second user device; and a processing step for processing the first power signal portion and the second power signal portion with a predetermined processing coefficient in response to the retransmission request to obtain a second allocation signal, wherein in the sending step, a second allocation signal is also sent to the first user device and the second user device, and the first user device and the second user device merge the first allocation signal and the second allocation signal to obtain data for the first user device and data for the second user device, respectively.

[0018] According to another aspect of the present disclosure, a method in a wireless communication system is also provided, the method comprising: a receiving step for receiving a first allocation signal from a base station, wherein the first allocation signal is synthesized using superposition coding and comprises at least a first power signal portion for a first user equipment and a second power signal portion for a second user equipment; a processing step for obtaining data for the first user equipment according to the first allocation signal; and a sending step for sending a retransmission request to the base station if no data for the first user equipment is obtained according to the first allocation signal, wherein in the receiving step, a second allocation signal from the base station is also received, the second allocation signal being 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 fed back by at least one of the first user equipment and the second user equipment, and wherein in the processing step, the first allocation signal and the second allocation signal are also merged to obtain data for the first user equipment.

[0019] According to another aspect of the present disclosure, a method in a wireless communication system is also provided, the method comprising: a receiving step for receiving a first allocation signal, the first allocation signal at least comprising a first power signal part and a second power signal part transmitted by a first user equipment and a second user equipment on the same first wireless transmission resource; a processing step for obtaining data respectively from the first user equipment and the second user equipment according to the first allocation signal; and a sending step for sending a retransmission request to the first user equipment and the second user equipment if 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, wherein in the receiving step, a second allocation signal is also received, the second allocation signal at least comprising a third power signal part and a fourth power signal part transmitted by the first user equipment and the second user equipment on the same second wireless transmission resource in response to the retransmission request, the third power signal part and the fourth power signal part being obtained by processing the first power signal part and the second power signal part with a predetermined processing coefficient, and wherein, in the processing step, the first allocation signal and the second allocation signal are also merged to obtain data respectively from the first user equipment and the second user equipment.

[0020] According to another aspect of the present disclosure, a method in a wireless communication system is also provided, the method comprising: a sending step for sending a first power signal portion to a base station at a first transmission power on a first wireless transmission resource that is the same as the wireless transmission resource on which a second user device sends a second power signal portion; a receiving step for receiving a retransmission request from the base station; and a processing step for processing the first power signal portion with a predetermined processing coefficient in response to the retransmission request to obtain a third power signal portion, wherein in the sending step, the third power signal portion is also sent to the base station at a third transmission power on a second wireless transmission resource that is the same as the wireless transmission resource on which a second user device sends a fourth power signal portion, and the fourth power signal portion is obtained by the second user device processing the second power signal portion with a predetermined processing coefficient in response to the retransmission request.

[0021] According to another aspect of the present disclosure, an electronic device is also provided, which may include a transceiver and one or more processors, and the one or more processors may be configured to execute the functions of the above-mentioned method or corresponding unit in the wireless communication system according to the present disclosure.

[0022] According to other aspects of the present disclosure, a computer program code and a computer program product for implementing the method according to the present disclosure, as well as a computer-readable storage medium having the computer program code for implementing the method according to the present disclosure recorded thereon, are also provided.

[0023] According to an embodiment of the present disclosure, by performing predetermined processing on a retransmission signal in multi-stream superposition transmission to reduce interference caused by transmission from other user equipments, the data success reception rate and the throughput of multi-stream superposition transmission can be improved.

[0024] Other aspects of the embodiments of the present disclosure are given in the following description, wherein the detailed description is used to fully disclose the preferred embodiments of the embodiments of the present disclosure without imposing limitations thereon. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present disclosure may be better understood by referring to the detailed description given below in conjunction with the accompanying drawings, wherein the same or similar reference numerals are used throughout the drawings to represent the same or similar components. The accompanying drawings, together with the following detailed description, are included in and form a part of the present specification to further illustrate the preferred embodiments of the present disclosure and to explain the principles and advantages of the present disclosure. Among them:

[0026] Figure 1 is a block diagram showing a functional configuration example of a device in a wireless communication system according to an embodiment of the present disclosure;

[0027] Figure 2 is a block diagram showing a functional configuration example of a device in a wireless communication system according to another embodiment of the present disclosure;

[0028] Figure 3 is a flowchart showing an example of a signaling interaction process for downlink transmission according to an embodiment of the present disclosure;

[0029] Figure 4 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;

[0030] Figure 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;

[0031] Figure 6 is a flowchart showing an example of a signaling interaction process for uplink transmission according to an embodiment of the present disclosure;

[0032] Figure 7 is a flowchart showing a process example of a method in a wireless communication system according to an embodiment of the present disclosure;

[0033] Figure 8 is a flowchart illustrating a process example of a method in a wireless communication system according to another embodiment of the present disclosure;

[0034] Fig. 9 is a flowchart showing a process example of a method in a wireless communication system according to yet another embodiment of the present disclosure;

[0035] Fig.10 is a flowchart showing a process example of a method in a wireless communication system according to still another embodiment of the present disclosure;

[0036] Fig.11 is a block diagram showing an example structure of a personal computer as an information processing device that can be employed in an embodiment of the present disclosure;

[0037] 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 can be applied;

[0038] 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 can be applied; and

[0039] Fig.14 is a block diagram showing an example of a schematic configuration of a smartphone to which the technology of the present disclosure can be applied. DETAILED DESCRIPTION

[0040] Exemplary embodiments of the present disclosure will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this disclosure.

[0041] It is also necessary to explain here that in order to avoid obscuring the present disclosure due to unnecessary details, only the device structure and / or processing steps closely related to the scheme according to the present disclosure are shown in the accompanying drawings, while other details that are not closely related to the present disclosure are omitted.

[0042] Next, we will refer to Figures 1 to 14 The embodiments of the present disclosure are described in detail.

[0043] Before describing the embodiments of the present disclosure in detail, the content related to superposition coding will be briefly introduced.

[0044] By means of superposition coding, the transmitter can use the same transmission resources to communicate with multiple receivers. For example, the current downlink multi-user superposition transmission can support the base station to send multiple data streams to more than one user equipment at the same time without distinguishing them by different time, frequency or multi-antenna technology. As an example, consider that 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. Assume that the radio conditions are weaker for the first receiver / link (for example, the position is far from the transmitter) and stronger for the second receiver / link (for example, the position is closer to the transmitter) (this situation may be temporary because the radio conditions are constantly changing, especially for mobile stations). In other words, for a fixed transmission radio power, the signal-to-interference-noise ratio SINR and the carrier-to-interference C / I ratio of the first receiver are lower than the corresponding SINR and C / I ratio of the second transmitter (or much lower than it). A transmitter Tx, knowing the relative radio conditions of the two receivers, may allocate its power budget proportionally between the two receivers for a particular time slot and a particular carrier frequency, so that a first data block intended for a first receiver Rx1 (a receiver under weaker radio conditions) is transmitted with higher power than a second data block intended for a second receiver Rx2 (a receiver under stronger radio conditions). For example, given the current radio conditions and the additional interference caused by transmitting the second data block to the second receiver Rx2, the transmitter Tx may use enough power for the first data block intended for the first receiver Rx1 to allow the first receiver Rx1 to decode this block. The transmitter Tx may then use less power for the second data block intended for the second receiver Rx2, but still enough for the second receiver Rx2 to decode the second data block using interference cancellation to cancel or reduce the interference caused by the transmission of the first 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 may be considered to "collide". Because the first data block is transmitted with a higher power allocation than the second data block, the second data block only appears as a noise or interference increase to the first receiver Rx1. If the power offset between the transmission of the two data blocks is high enough, the SINR degradation at the first receiver Rx1 may be small and even insignificant. Therefore, if the first data block is transmitted with sufficient power relative to the transmission rate of the first data block, the current radio conditions, and the additional interference caused by the transmission of the second data block, 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 a better SINR than the first receiver Rx1 due to the stronger radio conditions of the second receiver Rx2.Once the second receiver Rx2 decodes the first data block, the second receiver Rx2 can treat it as interference and use known interference cancellation techniques to eliminate the interference from the overall signal received during the period of receiving the two data blocks. The remaining signal represents the second data block combined with noise and interference from other sources. If the second data block is transmitted with sufficient power (but with less power than the first data block) relative to the transmission rate of the second data block and the radio conditions of the second receiver Rx2, the second receiver Rx2 should be able to decode the second data block.

[0045] Note that this method can be extended to three or more receivers. For example, the maximum power allocation can be used for transmission to the receiver in the weakest radio condition, the minimum power allocation can be used for transmission to the receiver in the strongest radio condition, and the intermediate power allocation can be used for the receiver in the intermediate radio condition. The receiver in the strongest radio condition can then decode the data block intended for the receiver in the weakest radio condition, eliminate the decoded block from the received signal, decode the data block intended for the receiver in the intermediate radio condition, eliminate the second decoded block, and finally decode the data block intended for itself (this decoding / elimination process can be called progressive interference cancellation). The receiver in the intermediate radio condition can also decode the data block intended for the receiver in the weakest radio condition, eliminate it from the received signal, and then decode the data block intended for itself. The receiver in the weakest radio condition may be able to directly decode the data block intended for it because this data block is transmitted at the highest power level. It should be understood that a person skilled in the art should be able to extend the progressive interference cancellation technique to four or more receivers without additional experimentation or further creative effort. 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, and the data block may be, for example, a data packet or a transport block.

[0046] With the development of superposition coding technology, the inventors of the present disclosure have considered that when applying it to an actual communication system, it is necessary to involve retransmission issues such as hybrid automatic repeat request (HARQ). If the corresponding data block is not decoded at any receiver in the above process, the receiver can send a corresponding retransmission request to the transmitter. However, if the superimposed data block (the data block that cannot be decoded in the initial transmission) is simply retransmitted as in the above superposition coding technology, the interference caused by the data block transmission relative to other receivers during the retransmission process is also enhanced. Therefore, even if the transmitter retransmits the signal, the receiver (even if it is tracked and merged with the previously initially transmitted data block, for example) may still not be able to decode the corresponding data block. The technology according to the present disclosure is made to solve the signal retransmission in superposition coding transmission, and the embodiments of the present disclosure will be described in detail below.

[0047] It should be understood that the superposition coding technique is briefly described above using downlink transmission as an example, but in the case of uplink transmission, that is, when multiple transmitters transmit to a single receiver at the same time on the same frequency, a similar process as described above can be performed at the single receiver. In this case, the receiver can be a base transceiver station, such as an eNB, and the multiple transmitters can be mobile stations, such as user equipment.

[0048] Figure 1 1 is a block diagram showing a functional configuration example of a device in a wireless communication system according to an embodiment of the present disclosure. The device may be included in a base station or may be located at a base station side, for example.

[0049] like Figure 1 As shown, the apparatus 100 according to this embodiment may include a sending unit 102, a receiving unit 104 and a processing unit 106. The functional configuration examples of each unit will be described in detail below.

[0050] The sending unit 102 can be configured to send a first allocation signal synthesized using superposition coding to multiple user equipment including at least a first user equipment and a second user equipment, and the first allocation signal may include at least a first power signal part for the first user equipment and a second power signal part for the second user equipment.

[0051] It should be noted that, for ease of explanation, here, an example is taken in which a base station sends a signal synthesized using superposition coding to two user equipments, a first user equipment and a second user equipment, but it should be understood that the base station can simultaneously send a signal synthesized using superposition coding to three or more user equipments, and the technology disclosed in the present invention is also applicable to this case. The first power signal portion here refers to a signal portion carrying a target data block of the first user equipment and sent to the first user equipment at, for example, a first power, and the second power signal portion refers to a signal portion carrying a target data block of the second user equipment and sent to the second user equipment at, for example, a second power. According to the above-mentioned superposition coding technology, it can be known that, depending on the radio conditions of the first user equipment and the second user equipment, the first power may be greater than the second power or may be less than the second power.

[0052] The receiving unit 104 may be configured to receive a retransmission request fed back from at least one of the first user equipment and the second user equipment. In the case where at least one of the first user equipment and the second user equipment fails to decode respective corresponding 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 to request signal retransmission.

[0053] The processing unit 106 may be configured to process 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.

[0054] Then, the sending unit 102 may be further configured to send a second allocation signal to the first user equipment and the second user equipment, so that the first user equipment and the second user equipment combine the first allocation signal and the second allocation signal to obtain data for the first user equipment and data for the second user equipment respectively.

[0055] It should be understood that although it is described here that the base station sends a retransmission signal to both the first user equipment and the second user equipment at the same time during retransmission, the present invention also intends to give an example in which the base station retransmits its signal only to the user equipment that issues a retransmission request. However, for the convenience of description, the case in which the base station sends a retransmission signal to all devices after receiving the retransmission request is described as an example, and the case in which the base station sends its signal only to the user equipment that issues the retransmission request can be regarded as a special case in which the power signal part of the retransmission signal for the user equipment that does not send the retransmission request is 0, and will not be described separately one by one here.

[0056] In fact, due to the correlation between user data decoding under multi-user superimposed transmission, if one user device fails to decode successfully in the initial transmission, it is very likely that other user devices will also fail to decode and issue a retransmission request. Compared with the general practice of using different transmission resources to retransmit the first user device and the second user device respectively, the example of the present invention performs specific processing during retransmission but still uses superimposed coding to use the same transmission resources to retransmit the first and second user devices at the same time, which greatly improves the resource utilization efficiency and can guarantee the success rate of retransmission to a certain extent. This performance gain will become more obvious when more user devices participate in the superimposed transmission.

[0057] Preferably, in order to reduce interference caused by transmission of other user equipments, in the combined first allocation signal and the second allocation signal, one of the first power signal part and the second power signal part is weakened or offset.

[0058] In order to weaken or eliminate the corresponding interference in the combined signal, the device 100 adjusts the interaction relationship between the signal part for the first user equipment and the signal part for the second user equipment on the same transmission resource before performing the superposition coding retransmission. For example, if the signal part for the first user equipment and the signal part for the second user equipment are transmitted on the same transmission resource in an additive relationship in the previous transmission, then in this retransmission, the device 100 subtracts the signal part for the first user equipment from the signal part for the second user equipment and transmits them on the same retransmission resource. Then, at the receiving user equipment end, the received signals of the two transmissions are combined to achieve the weakening of the signal part for other user equipment as interference. In other words, one of the first power signal part and the second power signal part is multiplied by a processing coefficient of negative 1 in the retransmission, while the other remains unchanged or is considered to be multiplied by a processing coefficient of 1. Preferably, the predetermined processing coefficient can be determined based on the Hadamard matrix. Specifically, as an example, the predetermined processing coefficient may be referred to as a "layer time code matrix" hereinafter, 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), and the layer time code matrix may be expressed as follows:

[0059]

[0060] In the described example, it is assumed that a base station needs to transmit two data blocks b to the first user equipment and the second user equipment respectively. F With b N , the corresponding symbol strings after modulation are d F With d NAssume that the wireless channel where the first user equipment is located is weak (for example, the location is far away), and the wireless channel where the second user equipment is located is strong (for example, the location is close). The layer time code matrix used by the base station is a 2×(R+1) (where R+1 represents the maximum number of transmissions) Hadamard matrix A, which can be obtained by repeating a 2×2 Walsh matrix.

[0061]

[0062] The first row of the matrix contains the predetermined coefficients for the first user equipment at each retransmission number, and the second row of the matrix contains the predetermined coefficients for the second user equipment at each retransmission number. Assume that in the initial transmission, the downlink channels between the base station and the first and second user equipments are h F,0 With h N,0 The base station is based on h F,0 With h N,0 The attenuation situation is that the power allocated to the data block transmission of the two user equipments is p F,0 With p N,0 , p F,0 >p N,0 During the initial transmission, the number of retransmissions is 0, and the base station uses the coefficients A(0,0)=1 and A(1,0)=1 in the 0th column of the layer time code matrix to calculate d F With d N Weighted and weighted results are superimposed to obtain the baseband signal string x to be sent 0 (i.e., the first distribution signal mentioned above), wherein,

[0063] ( That is, the first power signal part, That is, the second power signal part).

[0064] The signal initially received by the first user equipment can be characterized as:

[0065]

[0066] Among them, n F,0 is the additive noise when the first user equipment receives for the first time.

[0067] The signal initially received by the second user equipment can be characterized as:

[0068]

[0069] where n N,0 is the additive noise when the first user equipment receives for the first time.

[0070] The first user equipment receives x 0 Then the second power signal part Considered as part of the noise, according to h F,0 With p F For F,0 The second user equipment receives x 0 Then according to h N,0 With p F For N,0 Demodulate and self-check to get b F , and then according to b F Recover the interference signal Then in y N,0 Remove interference signals use According to h N,0 With p N,0 Perform demodulation and self-test.

[0071] If the first and second user equipments self-check that the data blocks are received correctly, they notify the base station to send the next corresponding data blocks, for example, the first and second user equipments respectively send 1-bit confirmation (ACK) information to the base station through their respective uplink channels. After sending the data block, the base station waits for the confirmation information of the user equipment for the data block transmitted this time, and transmits the next data block only after receiving the confirmation.

[0072] However, if an error occurs in the self-check data block reception in one of the first user equipment and the second user equipment, the base station may be notified to resend the data block. For example, the first and / or second user equipment sends 1 bit of non-acknowledgement (NACK) information to the base station through their respective uplink channels as a resend request. After receiving the resend request, the base station may optionally send a resend request according to the downlink channel h F,1 With h N,1 The attenuation situation is that the power of the data block transmission of the two user equipments is reallocated to p F,1 With p N,1 (In order to reduce system overhead or simplify calculation complexity, the base station can also reuse the power allocated in the last transmission, that is, p F,1 =p F,0 , p N,1 =p N,0 ), p F,1 >p N,1 , the retransmitted d is processed with a predetermined processing coefficient (i.e., the coefficients A(0,1)=1 and A(1,1)=-1 in the first column of the layer time code matrix) F With d N Weighted and weighted results are superimposed to obtain the baseband signal string x to be sent 1 (i.e., the second distribution signal mentioned above), wherein,

[0073]

[0074] It should be understood that in the above example, the device 100 can, for example, pre-generate a complete layer time code matrix, and correspond each row to the data stream of each user equipment, and each column to each retransmission number, and at the corresponding retransmission number, the predetermined coefficients contained in the corresponding column are taken out to conveniently process the data stream of each user equipment. In an optional example, the device 100 can also generate corresponding coefficients only for the current retransmission number and the user equipment involved in the retransmission for processing.

[0075] The signal received by the first user equipment during the first retransmission (second transmission) can be characterized as follows:

[0076]

[0077] Among them, h F,1 is the channel of the first retransmission of the first user equipment, n F,1 is the additive noise during the first retransmission of the first user equipment.

[0078] The signal received by the second user equipment during the first retransmission can be characterized as:

[0079]

[0080] Among them, h N,1 is the channel of the second user equipment during the first retransmission, n N,1 is the additive noise during the first retransmission by the second user equipment.

[0081] In a simplified example, the time interval between the retransmission and the last transmission is very small, and the change in the channel conditions from the base station to the first and second user equipments can be ignored, and the transmission power used in the two transmissions remains unchanged (ie, h F,1 =h F,0 ,h N,1 =h N,0 , p F,1 =p F,0 , p N,1 =p N,0 ), the first user equipment receives y from two downlink data transmissions respectively F,0 With y F,1 Perform forward merging, and the signal after forward merging is:

[0082] y F =y F,0 +y F,1

[0083] Then the signal part related to the second user equipment is eliminated, while the signal part related to the first user equipment is enhanced, so that the first user equipment can decode its target data block.

[0084] On the other hand, the second user equipment receives the y received in the two downlink data transmissions respectively. N,0 With y N,1 Perform negative merging, and the signal after negative merging is:

[0085] yN=y N,0 -y N,1

[0086] Then the signal part related to the first user equipment is eliminated, while the signal part related to the second user equipment is enhanced, so that the second user equipment can decode its target data block.

[0087] As an optional embodiment, when the channel conditions and transmission power change significantly in two transmissions, the first user equipment receives the y signals in the two downlink data transmissions respectively. F,0 With y F,1 Perform the following forward merging, and the signal after forward merging is:

[0088]

[0089] From y F As can be seen, y F,0 With y F,1 They are multiplied by specific parameters before being forward combined. These specific parameters help to use mathematical methods to enhance d under channel and power changes. F And weaken d N It is understood that those skilled in the art can also design other specific parameters based on the concept of the present invention to pre-process the y before merging. F,0 With y F,1 To achieve the same purpose, for example, by removing the power part of the above formula, the present invention will not list them one by one. Then, the first user equipment calculates y F Perform demodulation and self-test to obtain the target data stream b F .

[0090] On the other hand, similarly, the second user equipment firstly N,0 With y N,1 Perform negative merging, and the signal after negative merging is

[0091]

[0092] From y' N As can be seen, d N It has been enhanced, F The interference power of the second user equipment to y' N Perform demodulation and self-test to try to obtain the target data stream b N .

[0093] If the second user equipment cannot obtain the target data stream b N , then we can also base on y N,0 With y N,1 Perform forward merging, and the signal after forward merging is

[0094]

[0095] From y″ N As can be seen, d F It has been enhanced, N The interference power of the second user equipment is weakened. N Demodulate and self-check to get b F , then at y′ N Remove interference signals

[0096] And to d N Perform demodulation and self-test to obtain b N Optionally, the second user equipment may also perform forward merging first to obtain y″ N And decode it according to the above method b N , if decoding fails, then do negative merging again to get y ' N Then decode b N .

[0097] As another embodiment, the base station not only notifies the first user equipment d F The allocated power is also notified to the second user equipment signal part d N The first user equipment is based on y F,0 With y F,1 Conducted to eliminate N Interference F The enhanced merger of

[0098]

[0099] From y F As can be seen, d F It has been enhanced, N The interference of y is eliminated. Then the first user equipment F Perform demodulation and self-test to obtain the target data stream b F .

[0100] Similarly, the second user equipment first N,0 With y N,1 Conducted to eliminate F Interference and enhancementN Negative merge:

[0101]

[0102] From y' N As can be seen, d N It has been enhanced, F The second user equipment is connected to y' N Perform demodulation and self-test to try to obtain the target data stream b N .

[0103] If the second user equipment cannot obtain the target data stream b N , then based on and Conducted to eliminate N Interference and enhancement F The forward merge signal is:

[0104]

[0105] From y" N As can be seen, d F It has been enhanced, N The interference of the second user equipment is eliminated. N,0 With y N,1 Perform negative merging, and the signal after negative merging is

[0106]

[0107] Then the second user device pairs y" N Demodulate and self-check to get b F , then at y"′ N Remove interference signals And to d N Perform demodulation and self-test.

[0108] When demodulating the data signal, in one example, the first and second user equipments know the transmission power p F and p N For example, the base station indicates the transmission power p to the first and second user equipments through control signaling. F and p N , the user equipment can estimate the channel h according to, for example, the cell-specific reference signal (CRS) and the channel state indicator-reference signal (CSI-RS). F and h N , thereby solving the corresponding data b F or b N .

[0109] On the other hand, after the first transmission, if the first user equipment receives the data incorrectly but the second user equipment receives the data correctly, as an embodiment, the base station may send only the data block for the first user equipment according to the predetermined coefficient (for example, P N,1 If the first user equipment fails to demodulate the retransmission separately, it can forward combine the two received signals according to its corresponding layer time code [A(0,0), A(0,1)]. Since the signal part of the first user equipment is enhanced in the combined signal, the possibility of the first user equipment decoding and obtaining its data is greatly improved. Of course, in this case, the base station can also send data blocks for the first user equipment and the second user equipment at the same time as the above method, and eliminate the interference signal part through the above combination method.

[0110] On the other hand, after the first transmission, if the second user equipment receives the signal incorrectly and the first user equipment receives the signal correctly, as an embodiment, the base station may send only the data block for the second user equipment according to the predetermined coefficient next time, and the second user equipment may perform negative merging of the signals received twice before and after according to its corresponding layer time code [A(1,0), A(1,1)] when the attempt to demodulate the retransmission alone fails. Since the signal part of the second user equipment is enhanced in the merged signal, the possibility of the second user equipment decoding and obtaining its data is greatly improved. Of course, in this case, the base station may also send the data blocks for the first user equipment and the second user equipment at the same time as in the above method, and eliminate the interference signal part by the above merging method. In other words, when only one of the first user equipment and the second user equipment receives the signal incorrectly, the base station may also send the data blocks for the first user equipment and the second user equipment at the same time as in the above method, and eliminate the interference signal part by the above merging method.

[0111] It should be noted that in the case of retransmitting the data block of the user equipment that failed to demodulate separately, in addition to the above example, the user equipment can have many combined decoding schemes. For example, the second user equipment in the previous paragraph can also forward combine the two received signals to eliminate d N , and first decode d F Then reverse the process to get the target data d N , or these decoding schemes are combined in a specific order to be executed step by step. For the sake of brevity, they are not listed one by one here.

[0112] The above retransmission process can be repeated until the maximum limit of user data retransmission is reached. If demodulation still fails, the transmission failure is declared and the transmission is abandoned. The limit of the number of data retransmissions can be configured by the base station at a high level and indicated to each user equipment through signaling. For example, the present invention can apply the maxHARQ-Tx maximum number of retransmissions configured by the radio resource control (RRC).

[0113] It should be noted that although in the examples described above, the matrix elements of the layer time code matrix determined based on the Hadamard matrix are 1 or -1, the elements therein may also be elements other than 1 or -1, as long as one of the first power signal part and the second power signal part can be weakened or offset in the merged signal.

[0114] In addition, it should be pointed out that in the examples described above, positive or negative combining operations of addition and subtraction are performed at the first user device and the second user device, respectively, but positive or negative combining operations of addition or subtraction may also be performed at both user devices, so that the data corresponding to the first power signal part or the second power signal part can be decoded first, and then the data corresponding to the other power signal part can be inferred based on this.

[0115] That is to say, the example calculation process described above is only an example and not a limitation, and those skilled in the art may adjust the above calculation process according to the principles of the present disclosure, and such adjustments are considered to fall within the scope of the present disclosure.

[0116] In addition, it should be understood that in addition to or instead of processing the first power signal portion and the second power signal portion with a predetermined processing coefficient as described above, in response to a retransmission request, the processing unit 106 may be further configured to adjust the transmission power of at least one of the first power signal portion and the second power signal portion to obtain a second allocation signal.

[0117] Specifically, assuming that the transmission power of the first power signal part is greater than the transmission power of the second power signal part, when the signal reception of at least one of the first user device and the second user device fails, the processing unit 106 may further increase the transmission power of the first power signal part during retransmission and correspondingly reduce the transmission power of the second power signal part. In this way, the first user device and the second user device may first decode the data corresponding to the first power signal part according to the combined signal of the first allocation signal and the second allocation signal, and then deduce the data corresponding to the second power signal part through nonlinear interference elimination such as serial interference elimination.

[0118] Preferably, in order to enable the first user equipment and the second user equipment to respectively perform corresponding merging operations (e.g., addition operations or subtraction operations) on the above-mentioned first allocation signal and the second allocation signal so as to eliminate interference to the maximum extent and reduce the calculation load, the sending unit 102 may be further configured to send a merging indication indicating how to perform the merging operation to the first user equipment and the second user equipment, respectively, so that the first user equipment and the second user equipment merge the first allocation signal and the second allocation signal according to the merging indication. Preferably, regarding the merging indication, the sending unit 102 may notify the user equipment by including the merging indication in a high-layer signaling (e.g., RRC signaling, MAC layer signaling, etc.), and the merging indication may include the above-mentioned layer time code matrix and / or the row number corresponding to the corresponding user equipment. In the example where the predetermined processing coefficient is generated on the base station side in real time, the first user equipment and the second user equipment may also be notified of the predetermined processing coefficient, the merging operation of addition or subtraction, etc. adopted by the current transmitting base station through physical layer signaling (e.g., downlink control information DCI), etc. In the case where the combination indication is included in the physical layer signaling, the signaling can be transmitted via a physical downlink control channel (PDCCH), and in this case has better time variability.

[0119] The most likely application scenario of multi-user superposition coding is that only one farther user equipment and one closer user equipment share transmission resources. Therefore, in an optional example, the base station side and the user equipment side, for example, have pre-shared knowledge of a layer time code matrix, in which the first row is fixed to correspond to the retransmission processing coefficient of the farther user equipment, and the second row is fixed to correspond to the retransmission processing coefficient of the closer user equipment. In this example, the memory of the user equipment pre-stores the layer time code matrix, and the user equipment can, for example, determine whether it is a farther or closer user equipment (the farther one has higher power, and the closer one has lower power) based on the transmission power indicated by the base station for the two user equipment respectively, and then read the corresponding predetermined coefficients in the layer time code matrix for the merging operation.

[0120] Preferably, the merging instruction may be to perform a merging operation to enhance the higher power signal portion in the first power signal portion and the second power signal portion. That is, as described above, for the first power signal portion and the second power signal portion If the first power signal portion is greater than the second power signal portion, the combining indication may be a first allocation signal at the first user equipment and the second user equipment. and the second distribution signal The addition and combination operation is performed to enhance the first power signal portion, so that the data corresponding to the first power signal portion can be first decoded at the first user equipment and the second user equipment, and then the data corresponding to the second power signal portion can be deduced by, for example, serial interference cancellation. Conversely, if the first power signal portion is smaller than the second power signal portion, the combination indication can be an indication of the first allocation signal portion being decoded at the first user equipment and the second user equipment. and the second distribution signal Subtraction and combining operations are performed to enhance the second power signal portion, so that the data corresponding to the second power signal portion can be first decoded at the first user equipment and the second user equipment, and then the data corresponding to the first power signal portion can be derived by, for example, serial interference elimination.

[0121] In addition, preferably, the merging instruction may be to perform a merging operation to respectively enhance the power signal parts for the first user equipment and the second user equipment in the first power signal part and the second power signal part. That is, the base station may respectively instruct the first user equipment and the second user equipment to perform corresponding merging operations to enhance the power signal parts corresponding to their respective target data blocks.

[0122] It should be understood that the merging indication may be optional. That is, the base station may not send a merging indication to the user equipment, and the user equipment may perform a default merging operation (e.g., an addition merging operation) according to general conditions. If the corresponding data cannot be decoded according to the default merging operation, the subtraction merging operation may be performed again. In other words, the user equipment may also decide how to perform the merging operation by itself. In this way, the signaling overhead may be reduced.

[0123] It will be understood that although the above provides an example processing process for processing the retransmission signal so that the first power signal portion or the second power signal portion in the combined initial transmission signal and the retransmission signal is weakened or offset, these are merely examples and not limitations, and those skilled in the art may modify the above process based on the principles of the present disclosure.

[0124] Reference above Figure 1 The functional configuration example of the device on the base station side has been described. Next, reference will be made to Figure 2 A functional configuration example of an apparatus on the user equipment side in a wireless communication system according to another embodiment of the present disclosure is described. Figure 2 1 is a block diagram showing a functional configuration example of an apparatus on a user equipment side in a wireless communication system according to another embodiment of the present disclosure. The apparatus may be located in the user equipment or may be located on the user equipment side.

[0125] like Figure 2As shown, the apparatus 200 according to this embodiment may include a receiving unit 202, a processing unit 204, and a sending unit 206. The functional configuration examples of each unit will be described in detail below.

[0126] The receiving unit 202 may be configured to receive a first allocation signal from a base station, wherein the first allocation signal is synthesized using superposition coding and includes at least a first power signal part for a first user equipment and a second power signal part for a second user equipment.

[0127] The processing unit 204 may be configured to obtain data for the first user equipment according to the first allocation signal. Specifically, for example, the processing unit 204 may obtain data for the first user equipment from the first allocation signal by interference removal reception, demodulation and self-test.

[0128] Due to interference, etc., the processing unit 204 may not be able to correctly decode the corresponding data according to the first allocation signal. In this case, the sending unit 206 may be configured to send a retransmission request to the base station when the processing unit 204 does not obtain the data for the first user equipment according to the first allocation signal, so that the base station can send a second allocation signal to the first user equipment.

[0129] The receiving unit 202 may be further configured to receive a second allocation signal from the base station, the second allocation signal being 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 fed back by at least one of the first user equipment and the second user equipment. The specific process of obtaining the second allocation signal may refer to the description of the corresponding position above, which will not be repeated here.

[0130] Next, the processing unit 204 may be further configured to combine the first allocation signal and the second allocation signal to weaken or eliminate one of the first power signal portion and the second power signal portion in the combined signal, thereby obtaining data for the first user equipment.

[0131] Specifically, as described above, the processing unit 204 can directly decode the data corresponding to the first power signal portion by performing a merging operation to weaken or eliminate the second power signal portion, or can also first decode the higher power signal portion (for example, the second power signal portion) by performing a merging operation, and based on the merging result, indirectly obtain the data corresponding to the first power signal portion through nonlinear interference elimination such as serial interference elimination.

[0132] Preferably, the processing unit 204 can be further configured to merge the first allocation signal and the second allocation signal to enhance the higher power signal portion in the first power signal portion and the second power signal portion, so as to first decode the data corresponding to the higher power signal portion, and then deduce the data corresponding to the lower power signal portion through nonlinear interference elimination such as serial interference elimination.

[0133] Alternatively, as a preferred example, the 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. Similarly, similar processing may be performed on the second user equipment side. That is, the processing unit 204 of the user equipment may decide by itself how to perform the merging operation to enhance the power signal portion corresponding to the target data block of its own user equipment, so that the desired target data may be directly obtained.

[0134] Preferably, in order to enable each user equipment to perform a corresponding merging operation to decode its own data, the receiving unit 206 may further receive a merging indication from the base station, so that the processing unit 204 may further perform a corresponding merging operation (e.g., addition merging or subtraction merging) on ​​the first allocation signal and the second allocation signal according to the merging indication. The merging indication may be included in a high-layer signaling (e.g., RRC signaling, MAC layer signaling, etc.) or a physical layer signaling (e.g., DCI). Preferably, as described above, the merging indication may not necessarily be different for each user equipment, but the merging indication may also be to perform a merging operation to enhance the higher power signal portion in the first power signal portion and the second power signal portion or to enhance the power signal portion corresponding to the target data block of each user equipment.

[0135] When decoding the data signal, if the user equipment knows the transmit power, the processing unit 204 may be further configured to estimate the channel state according to the CRS or CSI-RS from the base station (the above h 0 ) and decode the corresponding data according to the transmit power and channel status.

[0136] It should be noted that reference is made here to Figure 2 The device of the user equipment end described is the same as that of the above reference Figure 1 Next, the signaling interaction process for downlink transmission according to the embodiment of the present disclosure will be described in combination with the base station and user equipment devices described above.

[0137] Figure 3 is a flowchart illustrating an example of a signaling interaction process for downlink transmission according to an embodiment of the present disclosure.

[0138] like Figure 3 As shown, in step S31, the base station first predefines the 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 the corresponding data stream sequence number to the user equipment. Next, in step S33, the base station determines the layer time code parameter used for the data block transmission this time 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, and adjusts the power of the weighted data block, and in step S35, superimposes the power-adjusted data blocks. Then, in step S36, the base station sends the superimposed signal to the user equipment. After receiving the superimposed signal, the user equipment demodulates and sorts the received data blocks in step S37, performs serial interference elimination demodulation, and performs CRC self-check on the demodulated data in step S38. In step S39, when there are more than one retransmissions, for the data blocks that cannot be demodulated correctly, the user equipment performs linear merging based on the principle of forward superposition of received power according to the layer time code corresponding to it, and performs crosstalk interference elimination demodulation and self-test, and sends the self-test result to the base station in step S310. Finally, in step S311, if the base station determines that the data block needs to be retransmitted, the base station increments the corresponding retransmission sequence number, repeats steps S33 to S310, and retransmits the data block; otherwise, the base station resets the retransmission sequence number to 0, repeats steps S33 to S310, and sends a new data block.

[0139] It should be noted that the above signaling interaction process is only an example and not a limitation. Figure 1 and Figure 2 The description of the above signaling interaction process can be modified. For example, the processing of adjusting the transmission power of the data block in step S34 is optional, so this step can be omitted. In addition, a step of sending a merging indication to the user equipment by the base station can be added, so that the user equipment does not always perform a forward merging operation and demodulate the signal by nonlinear interference elimination as in step S39, but can perform corresponding forward or negative merging operations according to the merging indication, thereby eliminating or weakening the interference signal part, so as to demodulate the corresponding data signal. For another example, although the preprocessing coefficients are defined in the form of a layer time code matrix here, the base station end may not predefine the layer time code matrix, but process the retransmission signal according to the actual receiving conditions. Of course, those skilled in the art can also think of other ways to modify the above signaling interaction process based on the principles of the present disclosure, and such modifications should all fall within the scope of the present disclosure.

[0140] Reference above Figures 1 to 3The case of downlink transmission is described, but the technology disclosed in the present invention can also be applied to the case of uplink transmission. Figures 4 to 6 Describe the uplink transmission situation.

[0141] Figure 4 1 is a block diagram showing a functional configuration example of a device in a wireless communication system according to another embodiment of the present disclosure. The device may be located in a base station or may be located on the base station side.

[0142] like Figure 4 As shown, the apparatus 400 according to this embodiment may include a receiving unit 402, a processing unit 404, and a sending unit 406. The functional configuration examples of each unit will be described in detail below.

[0143] The receiving unit 402 may be configured to receive a first allocation signal, the first allocation signal comprising at least a first power signal portion and a second power signal portion transmitted by the first user equipment and the second user equipment on the same first wireless transmission resource. Specifically, the first user equipment and the second user equipment send their 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 the signals from the two user equipments.

[0144] The processing unit 404 may be configured to obtain data from the first user equipment and data from the second user equipment according to the first allocation signal.

[0145] Due to interference, the processing unit 404 may not be able to correctly decode the data from the first user equipment and the second user equipment only according to the first allocation signal. Therefore, the sending unit 406 can be configured to send a retransmission request to the first user equipment and the second user equipment when the processing unit 404 fails to successfully obtain data from at least one of the first user equipment and the second user equipment according to the first allocation signal.

[0146] It should be understood that for a user equipment whose data has been successfully demodulated by the base station, the base station may not send a retransmission request to the user equipment, so that the power signal portion from the user equipment in the retransmission is 0. In addition, generally speaking, if the data of one of the user equipment cannot be successfully demodulated, the possibility of successfully demodulating the data from the other user equipment is also small, so it is usually necessary to send a retransmission request to both user equipments at the same time, but it does not exclude the case where a retransmission request is sent to only one of the user equipments. However, for the sake of convenience of description, the case where the base station sends a retransmission request to both user equipments is described as an example, but the case where a retransmission request is not sent to one of the user equipments is equivalent to a special case where the power signal portion from the user equipment in the retransmission is 0, and will not be described separately one by one here.

[0147] Therefore, the receiving unit 402 may further receive a second allocation signal, which may include at least a third power signal portion and a fourth power signal portion transmitted by the first user equipment and the second user equipment on the same second wireless transmission resource in response to the retransmission request, and 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 a predetermined processing coefficient. In the case where, for example, the base station sends a retransmission request to only one of the first user equipment and the second user equipment, the corresponding third power signal portion or the fourth power signal portion may be 0.

[0148] Then, the processing unit 404 may combine the first allocation signal and the second allocation signal to obtain data from the first user equipment and the second user equipment, respectively. Preferably, in the combined first allocation signal and the second allocation signal, the first power signal portion and the third power signal portion cancel each other out or weaken each other, or the second power signal portion and the fourth power signal portion cancel each other out or weaken each other. The specific processing of the first power signal portion and the second power signal portion to obtain the third power signal portion and the fourth power portion and eliminating the interference signal portions relative to each other through the combining operation to demodulate the data is basically the same as the above case regarding downlink transmission, and will not be repeated here.

[0149] Preferably, as described above, the processing unit 404 may further perform nonlinear interference cancellation according to the result of the merging. Specifically, when the data from one of the first user equipment and the second user equipment is solved by the merging operation as described above, the data from the other user equipment may be derived by, for example, serial interference cancellation.

[0150] Preferably, the processing unit 404 of the base station can determine the transmission power of each of the first power signal part, the second power signal part, the third power signal part and the fourth power signal part according to the current radio conditions, and send a power indication to the first user equipment and the second user equipment through the sending unit 406 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 can use the corresponding transmission power to send the first power signal part, the second power signal part, the third power signal part and the fourth power signal part. It should be understood that the transmission power can also be predetermined without the need for the base station to determine, so that the user equipment can use the predetermined transmission power to send its data to the base station.

[0151] In addition, preferably, the processing unit 404 may be further configured to determine the first wireless transmission resource and the second wireless transmission resource, and the sending unit 406 may be further configured to send a resource indication to the first user equipment and the second user equipment to indicate the first wireless transmission resource and the second wireless transmission resource. Alternatively, the first user equipment and the second user equipment may also send their respective data on a predetermined wireless transmission resource without the need for the base station to determine.

[0152] In addition, the processing unit 404 may be further configured to determine a predetermined processing coefficient, and the sending unit 406 may send the determined predetermined processing coefficient to the first user equipment and the second user equipment, so that the first user equipment and the second user equipment respectively process the first power signal portion and the second power signal portion using the predetermined processing coefficient to obtain the third power signal portion and the fourth power signal portion. Of course, the predetermined processing coefficient may also be predetermined without the need for the base station to determine it.

[0153] Preferably, the power indication, resource indication and predetermined processing coefficient may be included in an uplink grant signaling (UL grant) sent by the base station through the PDCCH.

[0154] Next, we will refer to Figure 5 A functional configuration example of a device in a wireless communication system according to still another embodiment of the present disclosure is described. Figure 5 1 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. The apparatus may be located in a user equipment or at a user equipment side.

[0155] like Figure 5 As shown, the apparatus 500 according to this embodiment may include a sending unit 502, a receiving unit 504, and a processing unit 506. The functional configuration examples of each unit will be described in detail below.

[0156] The transmitting unit 502 may be configured to transmit the first power signal portion to the base station at the first transmission power on the same first wireless transmission resource as the wireless transmission resource on which the second user equipment transmits the second power signal portion, wherein the second user equipment may, for example, transmit the second power signal portion at the second transmission power. In this way, the signal received by the base station is equivalent to a composite signal after the first power signal portion and the second power signal portion are superimposed.

[0157] The receiving unit 504 may be configured to receive a retransmission request from the base station. If the base station fails to 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.

[0158] The processing unit 506 may be configured to process the first power signal portion with a predetermined processing coefficient in response to the retransmission request to obtain a third power signal portion. Similarly, the second user equipment may also process the second power signal portion with a predetermined processing coefficient in response to the retransmission request to obtain a fourth power signal portion.

[0159] The transmitting unit 504 may be further configured to transmit the third power signal portion to the base station at the third transmission power on the same second wireless transmission resource as the wireless transmission resource on which the second user equipment transmits the fourth power signal portion, so that the base station can eliminate the interference signal portion from other user equipment by combining the two transmitted signals. That is, after combining at the base station end, the first power signal portion and the third power signal portion weaken or cancel each other, or the second power signal portion and the fourth power signal portion weaken or cancel each other.

[0160] As described above, the base station can determine the power used by the user equipment to send data signals, the wireless transmission resources used to send data signals, and the predetermined processing coefficients used to process retransmission signals, and the above-mentioned first transmission power and third transmission power may be included in the power indication from the base station, the first wireless transmission resources and the second wireless transmission resources may be included in the resource indication from the base station, and these power indications, resource indications and predetermined processing coefficients may be included in the uplink authorization signaling transmitted by the base station via PDCCH.

[0161] It should be understood that in addition to the above description, Figure 4 and Figure 5 The functional configuration examples of the devices at the base station end and the user equipment end for the uplink transmission situation described above are similar to those in the above reference Figure 1 and Figure 2 The functional configuration examples of the devices on the base station side and the user equipment side of the described downlink transmission situation are similar in many aspects, such as how to process the retransmitted signals and eliminate interference through merging operations, etc. Therefore, for the contents not described in detail here, please refer to the description of the corresponding positions above and will not be repeated here.

[0162] Next, the signaling interaction process for uplink transmission will be described in conjunction with the above-described devices on the base station side and the user equipment side. Figure 6 is a flowchart illustrating an example of a signaling interaction process for uplink transmission according to an embodiment of the present disclosure.

[0163] like Figure 6As shown, in step S61, the base station predefines the layer time code matrix. Then, in step S62, the base station indicates the corresponding data stream number to the user equipment. In step S63, the base station calculates the transmission power of each user equipment to send its data block, and indicates the corresponding transmission power to the user equipment in step S64. In step S65, the user equipment determines the layer time code parameter used for the data block transmission this time according to the retransmission sequence number and the data stream sequence number, and uses the layer time code parameter to weight the modulated data block. For the first transmission, the retransmission sequence number can be 0. Then, in step S66, the user equipment adjusts the power of the weighted data block according to the transmission power indication from the base station, and sends the data block to the base station in step S67. In step S68, the base station demodulates and sorts the received data blocks, performs serial interference elimination demodulation, and performs self-test on the demodulated data in step S69. In step S610, when there is more than one retransmission, for the data blocks that cannot be demodulated correctly, the base station can sequentially perform linear merging based on the corresponding layer time code parameters and the principle of forward superposition of received power, and perform serial interference elimination demodulation. Finally, in step S611, if the base station determines that the data block needs to be retransmitted, the base station increments the corresponding retransmission sequence number, repeats steps S63 to S610, and the user equipment retransmits the data block; otherwise, the base station resets the retransmission sequence number to 0, repeats steps S63 to S610, and the user equipment sends a new data block.

[0164] It should be understood that, as described above, similar to the situation of downlink transmission, the above-mentioned signaling interaction process is only an example and not a limitation, and those skilled in the art may modify the signaling interaction process according to the principles of the present disclosure. For example, the processing in step S63 is optional, and the transmission power used by the user equipment for data block transmission may also be predetermined. Furthermore, for example, there is no need to always perform a forward merging operation on the multiple transmitted signals as in step S610, but a forward or negative merging operation may be performed according to actual needs to reduce the computational load. Of course, those skilled in the art may also think of other variations of the above-mentioned signaling interaction process according to the principles of the present disclosure, which are not listed one by one here, and such variations should be considered to fall within the scope of the present disclosure.

[0165] It should be understood that although the above describes an example of the functional configuration of an apparatus in a wireless communication system according to an embodiment of the present disclosure and an example of the interaction process between corresponding communication devices, it should be understood that this is only an example and not a limitation, and those skilled in the art may modify the above embodiments according to the principles of the present disclosure, for example, the functional modules in each embodiment may be added, deleted and / or combined, and such modifications shall fall within the scope of the present disclosure.

[0166] Corresponding to the above-mentioned device embodiment, the embodiment of the present disclosure also provides a method in a wireless communication system. Figures 7 to 10 A process example of a method in a wireless communication system according to an embodiment of the present disclosure is described in detail.

[0167] Figure 7 1 is a flow chart showing an example of a method in a wireless communication system according to an embodiment of the present disclosure. The method may be performed at a base station side.

[0168] like Figure 7 As shown, the method according to this embodiment may include a sending step S702, a receiving step S704 and a processing step S706. The processing in each step will be described in detail below.

[0169] First, in the sending step S702, a first allocation signal synthesized using superposition coding may be sent to a plurality of user equipments including at least a first user equipment and a second user equipment, the first allocation signal including at least a first power signal part for the first user equipment and a second power signal part for the second user equipment. According to the principle of superposition coding, based on the radio conditions of the first user equipment and the second user equipment, the transmission power of the first power signal part may be greater than or less than the transmission power of the second power signal part.

[0170] When 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 to request to transmit the signal again. In the receiving step S704, a retransmission request fed back from at least one of the first user equipment and the second user equipment may be received.

[0171] Then, in processing step S706, in response to the retransmission request, the first power signal portion and the second power signal portion may be processed with a predetermined processing coefficient to obtain a second allocation signal. Preferably, 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".

[0172] After the second allocation signal is obtained in the processing step S706, the second allocation signal may be further sent to the first user equipment and the second user equipment in the sending step S702, so that the first user equipment and the second user equipment may respectively obtain their own data from the received first allocation signal and the second allocation signal.

[0173] According to the above processing, in the combined first allocation signal and the second allocation signal, one of the first power signal part and the second power signal part is weakened or eliminated, thereby greatly reducing the interference from the other user equipment when demodulating the data, thereby greatly improving the possibility of successfully demodulating the corresponding data.

[0174] It should be noted that the method described here is similar to that described above. Figure 1 The embodiments of the device in the described wireless communication system correspond to each other, so the contents not described in detail here can refer to the description of the corresponding positions above and will not be repeated here.

[0175] Figure 8 FIG. 1 is a flow chart showing an example of a method in a wireless communication system according to another embodiment of the present disclosure. The method may be executed on a user equipment side.

[0176] like Figure 8 As shown, the method according to this embodiment may include a receiving step S802, a processing step S804 and a sending step S806. The processing in each step will be described in detail below.

[0177] In the receiving step S802, a first allocation signal may be received from a base station, where the first allocation signal is synthesized using superposition coding and includes at least a first power signal part for a first user equipment and a second power signal part for a second user equipment.

[0178] Then, in the processing step S804, data for the first user equipment may be obtained according to the first allocation signal.

[0179] Next, in the sending step S806, when no data for the first user equipment is obtained according to the first allocation signal, a retransmission request may be sent to the base station.

[0180] After receiving the retransmission request, the base station may resend the data for the user equipment only to the user equipment that issued the retransmission request, or may resend the composite signal after superposition coding to both user equipments at the same time. In the receiving step S802, a second allocation signal is also received from the base station, and the second allocation signal is obtained by the base station processing the first power signal part and the second power signal part with a predetermined processing coefficient in response to the retransmission request fed back by at least one of the first user equipment and the second user equipment. It should be understood that in the case where the base station resends data only to the user equipment that issued the retransmission request, the data signal part related to another user equipment in the second allocation signal can be regarded as 0.

[0181] After receiving the second allocation signal, in processing step S804, the first allocation signal and the second allocation signal may be combined to obtain data for the first user equipment. Similarly, similar processing may be performed on the second user equipment side to obtain data for the second user equipment.

[0182] It should be noted that the method described here is similar to that described above. Figure 2 The embodiments of the device in the described wireless communication system correspond to each other, so the contents not described in detail here can refer to the description of the corresponding positions above and will not be repeated here.

[0183] Reference above Figure 7 and Figure 8 The described method is a method executed on the base station side and the user equipment side respectively in the case of downlink transmission. The following will describe a method executed on the base station side and the user equipment side respectively in the case of uplink transmission.

[0184] Fig. 9 FIG. 1 is a flow chart showing an example of a method in a wireless communication system according to another embodiment of the present disclosure. The method may be executed at a base station side.

[0185] like Fig. 9 As shown, the method according to this embodiment may include a receiving step S902, a processing step S904 and a sending step S906. The processing in each step will be described in detail below.

[0186] In the receiving step S902, a first allocation signal may be received, the first allocation signal at least including a first power signal part and a second power signal part transmitted by the first user equipment and the second user equipment on the same first wireless transmission resource. Since the first user equipment and the second user equipment transmit their respective data to the base station on the same time-frequency resource, the signal received at the base station is equivalent to data after superposition coding of the data from the two user equipments.

[0187] Next, in the processing step S904, data from the first user equipment and the second user equipment respectively may be obtained according to the first allocation signal.

[0188] Then, in the sending step S906, in the case that 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, a retransmission request is sent to the first user equipment and the second user equipment. Here, it is assumed that the base station sends a retransmission request to both user equipments. For the case where the base station only sends a retransmission request to the user equipment whose data is not demodulated, it can be regarded as a special case where the retransmission data from the device is 0.

[0189] In response to the retransmission request from the base station, the first user equipment and the second user equipment will send their data to the base station again on the same time-frequency resources. In the receiving step S902, a second allocation signal is also received, and the second allocation signal at least includes a third power signal part and a fourth power signal part transmitted by the first user equipment and the second user equipment on the same second wireless transmission resource in response to the retransmission request, and the third power signal part and the fourth power signal part are obtained by processing the first power signal part and the second power signal part with a predetermined processing coefficient. The predetermined processing coefficient can be predetermined or notified to the user equipment after being determined by the base station. After receiving the second allocation signal, in the processing step S904, the first allocation signal and the second allocation signal can be merged to obtain data from the first user equipment and the second user equipment respectively.

[0190] It should be noted that the method described here is similar to that described above. Figure 4 The embodiments of the device in the described wireless communication system correspond to each other, so the contents not described in detail here can refer to the description of the corresponding positions above and will not be repeated here.

[0191] Fig.10 FIG. 1 is a flow chart showing an example of a method in a wireless communication system according to another embodiment of the present disclosure. The method may be executed on a user equipment side.

[0192] like Fig.10 As shown, the method according to this embodiment may include a sending step S1002, a receiving step S1004 and a processing step S1006. The processing in each step will be described in detail below.

[0193] In the sending step S1002, the first power signal part may be sent to the base station at the first transmission power on the same first wireless transmission resource as the wireless transmission resource on which the second user equipment sends the second power signal part. That is, the first user equipment and the second user equipment send their respective data to the base station on the same time-frequency resource.

[0194] Then, in the receiving step S1004, a retransmission request from the base station may be received.

[0195] Next, in processing step S1006, 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. Similarly, at the second user equipment side, 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.

[0196] Then, in the sending step S1002, the third power signal part can be sent to the base station at the third transmission power on the second wireless transmission resource that is the same as the wireless transmission resource on which the second user equipment sends the fourth power signal part. That is, the first user equipment and the second user equipment transmit their respective third power signal parts and fourth power signal parts to the base station again on the same time-frequency resource, so that the base station can eliminate or weaken the interference from other user equipments by combining the signals transmitted multiple times, so as to successfully demodulate the corresponding user data.

[0197] It should be understood that the transmit power used by each user equipment to send signals, the used wireless transmission resources and the used predetermined processing coefficients can be determined at the base station end, and notified to the user equipment by the base station through, for example, uplink authorization signaling.

[0198] It should be noted that the method described here is similar to that described above. Figure 5 The embodiments of the device in the described wireless communication system correspond to each other, so the contents not described in detail here can refer to the description of the corresponding positions above and will not be repeated here.

[0199] It should be understood that although the above describes a process example of the method in a wireless communication system according to an embodiment of the present disclosure, this is only an example and not a limitation, and those skilled in the art may modify the above embodiments according to the principles of the present disclosure, for example, the steps in each embodiment may be added, deleted or combined, etc., and such modifications shall fall within the scope of the present disclosure.

[0200] In addition, it should be pointed out that although the process examples of the method in the wireless communication system according to the embodiment of the present disclosure are described in the order of flowcharts in the accompanying drawings and the above description, the execution order of the method according to the present disclosure is not limited to this, but these processes can also be performed in parallel or as needed.

[0201] According to the embodiments of the apparatus and method in the wireless communication system described above, by processing the retransmission signal in the superposition transmission to weaken or eliminate the interference caused by the transmission relative to other user equipment, the possibility of successfully demodulating the corresponding data can be greatly improved, and at the same time the throughput of the superposition transmission method can be improved.

[0202] In addition, according to an embodiment of the present disclosure, an electronic device is also provided, which may include a transceiver and one or more processors, and the one or more processors may be configured to execute the functions of the above-mentioned method or corresponding unit in the wireless communication system according to an embodiment of the present disclosure.

[0203] It should be understood that the machine-executable instructions in the storage medium and program products according to the embodiments of the present disclosure can also be configured to execute methods corresponding to the above-mentioned device embodiments. Therefore, the contents not described in detail here can refer to the description of the previous corresponding positions and will not be repeated here.

[0204] Accordingly, the storage medium for carrying the program product including the machine executable instructions is also included in the disclosure of the present invention, including but not limited to a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory stick, and the like.

[0205] In addition, it should be noted that the above series of processes and devices can also be implemented by software and / or firmware. In the case of being implemented by software and / or firmware, from a storage medium or a network to a computer with a dedicated hardware structure, such as Fig.11 The general-purpose personal computer 1100 shown installs the programs constituting the software, and when the various programs are installed, the computer can execute various functions and the like. Fig.11 : is a block diagram showing an example structure of a personal computer as an information processing device employable in the embodiments of the present disclosure.

[0206] exist Fig.11 In the embodiment, a central processing unit (CPU) 1101 executes various processes according to a program stored in a read-only memory (ROM) 1102 or a program loaded from a storage section 1108 to a random access memory (RAM) 1103. In the RAM 1103, data required when the CPU 1101 executes various processes and the like is also stored as needed.

[0207] The CPU 1101, the ROM 1102, and the RAM 1103 are connected to one another via a bus 1104. To the bus 1104, an input / output interface 1105 is also connected.

[0208] The following components are connected to the input / output interface 1105: an input section 1106 including a keyboard, a mouse, etc.; an output section 1107 including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 1108 including a hard disk, etc.; and a communication section 1109 including a network interface card such as a LAN card, a modem, etc. The communication section 1109 performs communication processing via a network such as the Internet.

[0209] A 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, etc. is mounted on the drive 1110 as needed so that a computer program read therefrom is installed into the storage section 1108 as needed.

[0210] In the case where the above-described series of processing is implemented by software, a program constituting the software is installed from a network such as the Internet or a storage medium such as the removable medium 1111 .

[0211] It should be understood by those skilled in the art that such storage media is not limited to Fig.11 The removable medium 1111 shown has a program stored therein and is distributed separately from the device to provide the program to the user. Examples of the removable medium 1111 include magnetic disks (including floppy disks (registered trademark)), optical disks (including compact disk read-only memory (CD-ROM) and digital versatile disks (DVD)), magneto-optical disks (including minidiscs (MD) (registered trademark)), and semiconductor memories. Alternatively, the storage medium may be the ROM 1102, a hard disk included in the storage section 1108, or the like, in which the program is stored and distributed to the user together with the device containing them.

[0212] Next, we will refer to Figure 12 to Figure 14 Application examples according to the present disclosure are described.

[0213] [Application examples of eNB]

[0214] (First application example)

[0215] Fig.12 1 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 a base station device 1220. The base station device 1220 and each antenna 1210 may be connected to each other via an RF cable.

[0216] 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 for the base station device 1220 to transmit and receive wireless signals. Fig.12 As shown, the eNB 1200 may include multiple antennas 1210. For example, the multiple antennas 1210 may be compatible with multiple frequency bands used by the eNB 1200. Fig.12 An example is shown in which the eNB 1200 includes a plurality of antennas 1210 , but the eNB 1200 may also include a single antenna 1210 .

[0217] The base station device 1220 includes a controller 1221 , a memory 1222 , a network interface 1223 , and a wireless communication interface 1225 .

[0218] The controller 1221 may be, for example, a CPU or a DSP, and operates various functions of the higher layers of the base station device 1220. For example, the controller 1221 generates a data packet based on the data in the signal processed by the wireless communication interface 1225, and transmits the generated packet via the network interface 1223. The controller 1221 may bundle data from a plurality of baseband processors to generate a bundled packet, and transmit the generated bundled packet. The controller 1221 may have a logical function to perform the following control: the control may be such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. The control may be performed in conjunction with a nearby eNB or core network node. 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).

[0219] The network interface 1223 is a communication interface for connecting the base station device 1220 to the core network 1224. The controller 1221 can communicate with the core network node or another eNB via the network interface 1223. In this case, the eNB 1200 and the core network node or other eNBs can be connected to each other through a logical interface (such as an S1 interface and an X2 interface). The network interface 1223 can also be a wired communication interface or a wireless communication interface for a wireless backhaul line. If the network interface 1223 is a wireless communication interface, the network interface 1223 can use a higher frequency band for wireless communication compared to the frequency band used by the wireless communication interface 1225.

[0220] The wireless communication interface 1225 supports any cellular communication scheme (such as long term evolution (LTE) and LTE-Advanced), and provides a wireless connection to a terminal located in a cell of the eNB 1200 via the antenna 1210. The wireless communication interface 1225 may generally include, for example, a baseband (BB) processor 1226 and an RF circuit 1227. The BB processor 1226 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing of layers (such as L1, medium access control (MAC), radio link control (RLC), and packet data convergence protocol (PDCP)). Instead of the controller 1221, the BB processor 1226 may have a part or all of the above-mentioned logical functions. The BB processor 1226 may be a memory storing a communication control program, or a module including a processor configured to execute a program and related circuits. Updating the program may change the function of the BB processor 1226. The module may be a card or a blade inserted into a slot of the base station device 1220. Alternatively, the module may also be a chip mounted on a card or a blade. Meanwhile, 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 .

[0221] like Fig.12 As shown, the wireless communication interface 1225 may include multiple BB processors 1226. For example, the multiple BB processors 1226 may be compatible with multiple frequency bands used by the eNB 1200. Fig.12 As shown, the wireless communication interface 1225 may include multiple RF circuits 1227. For example, the multiple RF circuits 1227 may be compatible with multiple antenna elements. Fig.12 An example is shown in which the wireless communication interface 1225 includes a plurality of BB processors 1226 and a plurality of RF circuits 1227 , but the wireless communication interface 1225 may also include a single BB processor 1226 or a single RF circuit 1227 .

[0222] (Second application example)

[0223] Fig.13 13 is a block diagram showing a second example of a schematic configuration of an eNB to which the technology of the present disclosure can be applied. The eNB 1330 includes one or more antennas 1340, a base station device 1350, and an RRH 1360. The RRH 1360 and each antenna 1340 can 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 an optical fiber cable.

[0224] 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 for the RRH 1360 to transmit and receive wireless signals. Fig.13 As shown, the eNB 1330 may include multiple antennas 1340. For example, the multiple antennas 1340 may be compatible with multiple frequency bands used by the eNB 1330. Fig.13 An example is shown in which the eNB 1330 includes a plurality of antennas 1340 , but the eNB 1330 may also include a single antenna 1340 .

[0225] 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. The controller 1351, the memory 1352, and the network interface 1353 are similar to the reference Fig.12 The controller 1221, memory 1222, and network interface 1223 described are the same.

[0226] The wireless communication interface 1355 supports any cellular communication scheme (such as LTE and LTE-Advanced), and provides wireless communication to a terminal located in a sector corresponding to the RRH 1360 via the RRH 1360 and the antenna 1340. The wireless communication interface 1355 may generally include, for example, a BB processor 1356. In addition to the BB processor 1356 being connected to the RF circuit 1364 of the RRH 1360 via the connection interface 1357, the BB processor 1356 is connected to the reference RF circuit 1364 of the RRH 1360. Fig.12 The same as the BB processor 1226 described above. Fig.13 As shown, the wireless communication interface 1355 may include multiple BB processors 1356. For example, the multiple BB processors 1356 may be compatible with multiple frequency bands used by the eNB 1330. Fig.13 An example is shown in which the wireless communication interface 1355 includes a plurality of BB processors 1356 , but the wireless communication interface 1355 may also include a single BB processor 1356 .

[0227] The 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 RRH 1360 for communication in the above-mentioned high-speed line.

[0228] The RRH 1360 includes a connection interface 1361 and a wireless communication interface 1363 .

[0229] The 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-mentioned high-speed line.

[0230] The wireless communication interface 1363 transmits and receives wireless signals via the antenna 1340. The wireless communication interface 1363 may generally include, for example, an RF circuit 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. Fig.13 As shown, the wireless communication interface 1363 may include multiple RF circuits 1364. For example, the multiple RF circuits 1364 may support multiple antenna elements. Fig.13 An example is shown in which the wireless communication interface 1363 includes a plurality of RF circuits 1364 , but the wireless communication interface 1363 may also include a single RF circuit 1364 .

[0231] exist Fig.12 and Fig.13 In the eNB 1200 and eNB 1330 shown in FIG. Figure 1and Figure 4 The sending unit and receiving unit described above may be implemented by the wireless communication interface 1225 and the wireless communication interface 1355 and / or the wireless communication interface 1363. At least part of the functions of the processing unit in the base station device in the above wireless communication system may also be implemented by the controller 1221 and the controller 1351.

[0232] [Application examples on user devices]

[0233] Fig.14 14 is a block diagram showing an example of a schematic configuration of a smartphone 1400 to which the technology of the present disclosure can be applied. The smartphone 1400 includes a processor 1401, a memory 1402, a storage device 1403, an external connection interface 1404, a camera 1406, a sensor 1407, a microphone 1408, an input device 1409, a display device 1410, a speaker 1411, a wireless communication interface 1412, one or more antenna switches 1415, one or more antennas 1416, a bus 1417, a battery 1418, and an auxiliary controller 1419.

[0234] The processor 1401 may be, for example, a CPU or a system on chip (SoC), and controls the functions of the application layer and other layers of the smartphone 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 smartphone 1400.

[0235] The camera 1406 includes an image sensor such as a charge coupled device (CCD) and a complementary metal oxide semiconductor (CMOS), and generates a captured image. The sensor 1407 may include a group 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 smart phone 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 a screen such as a liquid crystal display (LCD) and an organic light emitting diode (OLED) display, and displays an output image of the smart phone 1400. The speaker 1411 converts an audio signal output from the smart phone 1400 into sound.

[0236] The wireless communication interface 1412 supports any cellular communication scheme (such as LTE and LTE-Advanced), and performs wireless communication. The wireless communication interface 1412 may generally include, for example, a BB processor 1413 and an RF circuit 1414. The BB processor 1413 may perform, for example, encoding / decoding, modulation / demodulation, and multiplexing / demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 1414 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via an antenna 1416. The wireless communication interface 1412 may be a chip module on which the BB processor 1413 and the RF circuit 1414 are integrated. Fig.14 As shown, the wireless communication interface 1412 may include multiple BB processors 1413 and multiple RF circuits 1414. Fig.14 An example is shown in which the wireless communication interface 1412 includes a plurality of BB processors 1413 and a plurality of RF circuits 1414 , but the wireless communication interface 1412 may also include a single BB processor 1413 or a single RF circuit 1414 .

[0237] In addition, in addition to the cellular communication scheme, the wireless communication interface 1412 can support other types of wireless communication schemes, such as short-range wireless communication schemes, near field communication schemes, and wireless local area network (LAN) schemes. In this case, the wireless communication interface 1412 can include a BB processor 1413 and an RF circuit 1414 for each wireless communication scheme.

[0238] Each of the antenna switches 1415 switches a connection destination of the antenna 1416 between a plurality of circuits (eg, circuits for different wireless communication schemes) included in the wireless communication interface 1412 .

[0239] 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 for the wireless communication interface 1412 to transmit and receive wireless signals. Fig.14 As shown, smartphone 1400 may include multiple antennas 1416. Fig.14 An example is shown in which the smart phone 1400 includes a plurality of antennas 1416 , but the smart phone 1400 may also include a single antenna 1416 .

[0240] In addition, the smartphone 1400 may include an antenna 1416 for each wireless communication scheme. In this case, the antenna switch 1415 may be omitted from the configuration of the smartphone 1400.

[0241] The bus 1417 connects the processor 1401, the memory 1402, the storage device 1403, the external connection interface 1404, the camera 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 to each other. Fig.14 The various blocks of the smartphone 1400 shown are supplied with power, the feed lines being partially shown as dashed lines in the figure. The auxiliary controller 1419 operates the minimum necessary functions of the smartphone 1400, for example in a sleep mode.

[0242] exist Fig.14 In the illustrated smart phone 1400, by using Figure 2 and Figure 5 The sending unit and the receiving unit described above may be implemented by the wireless communication interface 1412. At least a part of the functions of the processing unit in the apparatus at the user equipment end described above may also be implemented by the processor 1401 or the auxiliary controller 1419.

[0243] The preferred embodiments of the present disclosure are described above with reference to the accompanying drawings, but the present disclosure is certainly not limited to the above examples. Those skilled in the art may obtain various changes and modifications within the scope of the appended claims, and it should be understood that these changes and modifications will naturally fall within the technical scope of the present disclosure.

[0244] For example, a plurality of functions included in one unit in the above embodiments may be implemented by separate devices. Alternatively, a plurality of functions implemented by a plurality of units in the above embodiments may be implemented by separate devices, respectively. In addition, 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.

[0245] The technology of the present disclosure can be configured as follows:

[0246] Configuration 1. An apparatus in a wireless communication system, the apparatus comprising:

[0247] A sending unit, configured to send a first allocation signal synthesized using superposition coding to a plurality of user equipments including at least a first user equipment and a second user equipment, wherein the first allocation signal includes at least a first power signal part for the first user equipment and a second power signal part for the second user equipment;

[0248] a receiving unit configured to receive a retransmission request fed back from at least one of the first user equipment and the second user equipment; and

[0249] a processing unit configured to, in response to the retransmission request, process the first power signal portion and the second power signal portion with a predetermined processing coefficient to obtain a second allocation signal,

[0250] The sending unit is further configured to send the 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 obtain data for the first user equipment and data for the second user equipment respectively.

[0251] Configuration 2. The apparatus according to configuration 1, wherein, in the combined first distribution signal and the second distribution signal, one of the first power signal portion and the second power signal portion is weakened or canceled.

[0252] Configuration 3. The apparatus according to Configuration 2, wherein the processing unit is further configured to adjust the transmission power of at least one of the first power signal part and the second power signal part to obtain the second allocation signal.

[0253] Configuration 4. An apparatus according to any one of configurations 1 to 3, wherein the sending unit is further configured to send a merging indication to the first user equipment and the second user equipment, respectively, indicating how to perform a merging operation, so that the first user equipment and the second user equipment merge the first allocation signal and the second allocation signal according to the merging indication.

[0254] Configuration 5. The apparatus according to configuration 4, wherein the merge indication is included in high-layer signaling or physical layer signaling.

[0255] Configuration 6. The apparatus according to Configuration 4, wherein the combining instruction is to perform a combining operation to enhance a higher power signal portion of the first power signal portion and the second power signal portion.

[0256] Configuration 7. An apparatus according to configuration 4, wherein the combining indication is to perform a combining operation to respectively enhance the power signal portions of the first power signal portion and the second power signal portion respectively for the first user equipment and the second user equipment.

[0257] Configuration 8. The apparatus according to Configuration 1, wherein the predetermined processing coefficient is determined based on a Hadamard matrix.

[0258] Configuration 9. An apparatus in a wireless communication system, comprising:

[0259] 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 includes at least a first power signal portion for a first user equipment and a second power signal portion for a second user equipment;

[0260] a processing unit, configured to obtain data for the first user equipment according to the first allocation signal; and

[0261] a sending unit, configured to send a retransmission request to the base station if the processing unit fails to obtain data for the first user equipment according to the first allocation signal,

[0262] The receiving unit is further configured to receive a second allocation signal from the base station, wherein the second allocation signal is obtained by the base station processing the first power signal part and the second power signal part with a predetermined processing coefficient in response to a retransmission request fed back by at least one of the first user equipment and the second user equipment, and

[0263] The processing unit is further configured to combine the first allocation signal and the second allocation signal to obtain data for the first user equipment.

[0264] Configuration 10. The apparatus according to configuration 9, wherein, in the combined first distribution signal and the second distribution signal, one of the first power signal portion and the second power signal portion is weakened or canceled.

[0265] Configuration 11. The apparatus according to configuration 9 or 10, wherein the receiving unit further receives a merging indication from the base station indicating how to perform a merging operation, and the processing unit is further configured to merge the first allocation signal and the second allocation signal according to the merging indication.

[0266] Configuration 12. The apparatus according to configuration 11, wherein the merge indication is included in higher layer signaling or physical layer signaling.

[0267] Configuration 13. According to the apparatus of configuration 9 or 10, the processing unit is further configured to combine the first distribution signal and the second distribution signal to enhance a higher power signal portion of the first power signal portion and the second power signal portion.

[0268] Configuration 14. The apparatus according to configuration 9 or 10, wherein the processing unit is 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.

[0269] Configuration 15. An apparatus according to configuration 9, wherein the processing unit is further configured to estimate a channel state based on a cell-specific reference signal CRS or a channel state indication-reference signal CSI-RS from the base station to obtain data for the first user equipment.

[0270] Configuration 16. The apparatus according to configuration 9, wherein the processing unit is further configured to perform nonlinear interference cancellation according to a result of the combining.

[0271] Configuration 17. An apparatus in a wireless communication system, the apparatus comprising:

[0272] a receiving unit configured to receive a first allocation signal, wherein the first allocation signal at least includes a first power signal part and a second power signal part transmitted by the first user equipment and the second user equipment on the same first wireless transmission resource;

[0273] a processing unit configured to obtain data respectively from the first user equipment and the second user equipment according to the first allocation signal; and

[0274] a sending unit, configured to send a retransmission request to the first user equipment and the second user equipment if the processing unit fails to successfully obtain data from at least one of the first user equipment and the second user equipment according to the first allocation signal,

[0275] The receiving unit is further configured to receive a second allocation signal, the second allocation signal at least comprising a third power signal part and a fourth power signal part transmitted by the first user equipment and the second user equipment on the same second wireless transmission resource in response to the retransmission request, the third power signal part and the fourth power signal part being obtained by processing the first power signal part and the second power signal part with a predetermined processing coefficient, and

[0276] The processing unit is further configured to combine the first allocation signal and the second allocation signal to obtain data respectively from the first user equipment and the second user equipment.

[0277] Configuration 18. The apparatus according to configuration 17, wherein, in the combined first distribution signal and the second distribution signal, 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.

[0278] Configuration 19. The apparatus according to configuration 17, wherein the processing unit is further configured to determine a transmit power of each of the first power signal portion, the second power signal portion, the third power signal portion, and the fourth power signal portion, and

[0279] The sending unit is further configured to send a power indication to the first user equipment and the second user equipment to indicate the determined transmit power.

[0280] Configuration 20. An apparatus according to configuration 19, wherein the processing unit is further configured to determine the first wireless transmission resource and the second wireless transmission resource, and the sending unit is further configured to send a resource indication to the first user equipment and the second user equipment to indicate the first wireless transmission resource and the second wireless transmission resource.

[0281] Configuration 21. The apparatus according to configuration 20, wherein the processing unit is further configured to determine the predetermined processing coefficient, and the sending unit is further configured to send the predetermined processing coefficient to the first user equipment and the second user equipment.

[0282] Configuration 22. The apparatus according to configuration 21, wherein the power indication, the resource indication, and the predetermined processing coefficient are included in uplink grant signaling.

[0283] Configuration 23. The apparatus according to configuration 17, wherein the processing unit is further configured to perform nonlinear interference cancellation according to a result of the combining.

[0284] Configuration 24. An apparatus in a wireless communication system, the apparatus comprising:

[0285] a sending unit, configured to send the first power signal part to the base station at a first transmission power on a first radio transmission resource that is the same as the radio transmission resource on which the second user equipment sends the second power signal part;

[0286] a receiving unit configured to receive a retransmission request from the base station; and

[0287] a processing unit configured to process the first power signal portion with a predetermined processing coefficient in response to the retransmission request to obtain a third power signal portion,

[0288] Wherein, the sending unit is further configured to send the third power signal part to the base station at a third transmission power on a second wireless transmission resource that is the same as the wireless transmission resource on which the second user equipment sends the fourth power signal part, and the fourth power signal part is obtained by the second user equipment processing the second power signal part with a predetermined processing coefficient in response to the retransmission request.

[0289] Configuration 25. The apparatus of configuration 24, wherein the first transmit power and the third transmit power are included in a power indication received from the base station.

[0290] Configuration 26. The apparatus according to configuration 25, wherein the first radio transmission resource and the second radio transmission resource are included in a resource indication received from the base station.

[0291] Configuration 27. The apparatus according to configuration 26, wherein the power indication, the resource indication, and the predetermined processing coefficient are included in uplink grant signaling.

[0292] Configuration 28. A method in a wireless communication system, the method comprising:

[0293] A sending step, for sending a first allocation signal synthesized using superposition coding to a plurality of user equipments including at least a first user equipment and a second user equipment, wherein the first allocation signal includes at least a first power signal part for the first user equipment and a second power signal part for the second user equipment;

[0294] a receiving step, configured to receive a retransmission request fed back from at least one of the first user equipment and the second user equipment; and

[0295] a processing step 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,

[0296] Wherein, in the sending step, the second allocation signal is also sent to the first user equipment and the second user equipment, and the first user equipment and the second user equipment merge the first allocation signal and the second allocation signal to obtain data for the first user equipment and data for the second user equipment respectively.

[0297] Configuration 29. A method in a wireless communication system, the method comprising:

[0298] A receiving step for receiving a first allocation signal from a base station, wherein the first allocation signal is synthesized using superposition coding and includes at least a first power signal part for a first user equipment and a second power signal part for a second user equipment;

[0299] a processing step for obtaining data for the first user equipment according to the first allocation signal; and

[0300] a sending step, configured to send a retransmission request to the base station when no data for the first user equipment is obtained according to the first allocation signal,

[0301] wherein, in the receiving step, a second allocation signal is further received from the base station, wherein the second allocation signal is obtained by the base station processing the first power signal part and the second power signal part with a predetermined processing coefficient in response to a retransmission request fed back by at least one of the first user equipment and the second user equipment; and

[0302] Wherein, in the processing step, the first allocation signal and the second allocation signal are further combined to obtain data for the first user equipment.

[0303] Configuration 30. A method in a wireless communication system, the method comprising:

[0304] A receiving step, for receiving a first allocation signal, wherein the first allocation signal at least includes a first power signal part and a second power signal part transmitted by the first user equipment and the second user equipment on the same first wireless transmission resource;

[0305] a processing step for obtaining data respectively from the first user equipment and the second user equipment according to the first allocation signal; and

[0306] a sending step, for sending a retransmission request to the first user equipment and the second user equipment when 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,

[0307] wherein, in the receiving step, a second allocation signal is also received, the second allocation signal at least comprising a third power signal part and a fourth power signal part transmitted by the first user equipment and the second user equipment on the same second wireless transmission resource in response to the retransmission request, the third power signal part and the fourth power signal part being obtained by processing the first power signal part and the second power signal part with a predetermined processing coefficient, and

[0308] Wherein, in the processing step, the first allocation signal and the second allocation signal are further combined to obtain data respectively from the first user equipment and the second user equipment.

[0309] Configuration 31. A method in a wireless communication system, the method comprising:

[0310] A sending step, for sending the first power signal part to the base station at a first transmission power on a first wireless transmission resource that is the same as the wireless transmission resource on which the second user equipment sends the second power signal part;

[0311] a receiving step, for receiving a retransmission request from the base station; and

[0312] a processing step for processing the first power signal portion with a predetermined processing coefficient in response to the retransmission request to obtain a third power signal portion,

[0313] Wherein, in the sending step, the third power signal part is also sent to the base station with a third transmission power on a second wireless transmission resource that is the same as the wireless transmission resource on which the second user equipment sends the fourth power signal part, and the fourth power signal part is obtained by the second user equipment processing the second power signal part with a predetermined processing coefficient in response to the retransmission request.

[0314] In this specification, the steps described in the flowchart include not only the processing performed in time series in the order described, but also the processing performed in parallel or individually rather than necessarily in time series. In addition, even in the steps processed in time series, it goes without saying that the order can be appropriately changed.

Claims

1. An electronic device in a wireless communication network, comprising: One or more processors configured to: Allocate a first transmission power to a first data signal of a first user equipment that is farther away among the multiple user equipments, and allocate a second transmission power to a second data signal of a second user equipment that is closer among the multiple user equipments; generating a first superimposed data signal by superimposing the first data signal on the second data signal; Controlling to use the same transmission resource to send the first superimposed data signal to the farther first user equipment and the closer second user equipment; In response to unconfirmed hybrid automatic repeat request feedback from the closer second user equipment, reallocate a third transmit power to the second data signal and reallocate a fourth transmit power to the first data signal, and generate a second superimposed data signal by superimposing the second data signal on the first data signal; as well as controlling the transmission of the second superimposed data signal to the closer second user equipment so that the second superimposed data signal is combined with the first superimposed data signal at the closer second user equipment, Among them, in the combined first superimposed data signal and the second superimposed data signal, the first data signal is weakened or offset.

2. The electronic device according to claim 1, wherein: Different transmission powers are allocated to the first data signal and the second data signal in proportion.

3. The electronic device according to claim 2, wherein: The first data signal is allocated a higher transmission power than the transmission power allocated to the second data signal.

4. The electronic device according to claim 1, wherein: The processor is further configured to generate the second superimposed data signal by superimposing the second data signal on the first data signal based on a predetermined processing coefficient.

5. The electronic device according to claim 4, wherein: The processor is further configured to: weight the second data signal and the first data signal using a predetermined processing coefficient and superimpose the second data signal and the first data signal.

6. The electronic device according to claim 1, wherein: The processor is further configured to: The physical downlink control channel includes an indication of the transmission power allocation for the farther first user equipment and the closer second user equipment, so as to notify the farther first user equipment and the closer second user equipment.

7. The electronic device according to claim 4, wherein: The processor is further configured to: An indication of the predetermined processing coefficient is included in a physical downlink control channel to notify the farther first user equipment and the closer second user equipment.

8. The electronic device according to claim 1, wherein: The electronic device is implemented as a base station in the wireless communication network.

9. An electronic device in a wireless communication network, comprising: One or more processors configured to: Allocate a first transmission power to a first data signal of a user equipment that is farther away from the multiple user equipments, and allocate a second transmission power to a second data signal of a user equipment that is closer to the multiple user equipments; generating a first superimposed data signal by superimposing the first data signal on the second data signal; Controlling to use the same transmission resource to send the first superimposed data signal to the farther user equipment and the closer user equipment; In response to unconfirmed hybrid automatic repeat request feedback from the more distant user equipment, reallocate a third transmit power to the first data signal and reallocate a fourth transmit power to the second data signal, and generate a second superimposed data signal by superimposing the first data signal on the second data signal; as well as controlling the transmission of the second superimposed data signal to the more distant user equipment so that the second superimposed data signal is combined with the first superimposed data signal at the more distant user equipment, Among them, in the combined first superimposed data signal and the second superimposed data signal, the second data signal is weakened or offset.

10. An electronic device in a wireless communication network, comprising: One or more processors configured to: Control receiving a first superimposed data signal from a base station, the first superimposed data signal comprising a first data signal of a farther user equipment with a first transmission power, the first data signal being superimposed on a second data signal of a closer user equipment with a second transmission power, the farther user equipment and the closer user equipment being from a plurality of user equipments that are communicatively coupled to the base station and have a relative distance from the base station; decoding the second data signal from the first superimposed data signal; If decoding of the second data signal fails, controlling to send an unconfirmed hybrid automatic repeat request feedback to the base station; controlling receiving a second superimposed data signal from the base station, the second superimposed data signal comprising the first data signal having a third transmit power superimposed on the second data signal having a fourth transmit power in response to unacknowledged hybrid automatic repeat request feedback sent to the base station; as well as combining the first superimposed data signal and the second superimposed data signal, and decoding the second data signal, Among them, in the combined first superimposed data signal and the second superimposed data signal, the first data signal is weakened or offset.

11. The electronic device according to claim 10, wherein: Different transmission powers are allocated to the first data signal and the second data signal in proportion.

12. The electronic device according to claim 11, wherein: The first data signal is allocated a higher transmission power than the transmission power allocated to the second data signal.

13. The electronic device according to claim 10, wherein: The second superimposed data signal is generated by the base station by superimposing the first data signal on the second data signal based on a predetermined processing coefficient.

14. The electronic device according to claim 13, wherein: The first data signal and the second data signal are weighted and superimposed with the predetermined processing coefficient.

15. The electronic device according to claim 10, wherein the processor is further configured to: A physical downlink control channel is received to identify an indication of a transmit power allocation for the more distant user equipment and the closer user equipment.

16. The electronic device according to claim 13, wherein: The processor is further configured to: A physical downlink control channel is received to identify an indication of the predetermined processing coefficient.

17. The electronic device according to claim 14, wherein: The processor is configured to: The first superimposed data signal and the second superimposed data signal are combined based on the predetermined processing coefficient to perform the merging.

18. The electronic device according to claim 10, wherein: The electronic device is implemented as the closer user equipment in the wireless communication network.

19. An electronic device in a wireless communication network, comprising: One or more processors configured to: Control receiving a first superimposed data signal from a base station, the base station sends a first data signal of a farther user equipment with a first transmission power, the farther user equipment is from a plurality of user equipments that are communicatively coupled to the base station and have a relative distance from the base station, the first data signal is superimposed on a second data signal of a closer user equipment among the plurality of user equipments with a second transmission power; decoding the first data signal from the first superimposed data signal; If decoding of the first data signal fails, controlling to send an unconfirmed hybrid automatic repeat request feedback to the base station; controlling receiving a second superimposed data signal from the base station, the second superimposed data signal comprising the first data signal having a third transmit power superimposed on the second data signal having a fourth transmit power in response to unacknowledged hybrid automatic repeat request feedback sent to the base station; as well as combining the first superimposed data signal and the second superimposed data signal, and decoding the first data signal, Among them, in the combined first superimposed data signal and the second superimposed data signal, the second data signal is weakened or offset.

20. A method for a base station in a wireless communication network, comprising: Allocate a first transmission power to a first data signal of a first user equipment that is farther away from the multiple user equipments, and allocate a second transmission power to a second data signal of a second user equipment that is closer to the multiple user equipments, wherein the first user equipment and the second user equipment are from a plurality of user equipments that are communicatively coupled to the base station and have a relative distance from the base station; generating a first superimposed data signal by superimposing the first data signal on the second data signal; Sending the first superimposed data signal to the first user equipment and the second user equipment using the same transmission resource; and In response to a non-confirmed hybrid automatic repeat request feedback from the second user equipment, reallocate the third transmission power to the second data signal and a data signal to reallocate the fourth transmission power, and by The first data signal is superimposed on the first data signal to generate a second superimposed data signal, and Sending the second superimposed data signal to the second user equipment so that The second superimposed data signal is combined with the first superimposed data signal at the second user equipment Signal merging, Among them, in the combined first superimposed data signal and the second superimposed data signal, The first data signal is weakened or cancelled; or In response to a non-confirmed hybrid automatic repeat request feedback from the first user equipment, reallocating a third transmission power to the first data signal and a fourth transmission power to the second data signal, and generating a second superimposed data signal by superimposing the first data signal on the second data signal, and sending the second superimposed data signal to the first user equipment so that the second superimposed data signal is combined with the first superimposed data signal at the first user equipment, Among them, in the combined first superimposed data signal and the second superimposed data signal, the second data signal is weakened or offset.

21. A method for use in a wireless communication network, comprising: receiving a first superimposed data signal from a base station, the first superimposed data signal comprising a first data signal of a farther user equipment with a first transmission power, the first data signal being superimposed on a second data signal of a closer user equipment with a second transmission power, the farther user equipment and the closer user equipment being from a plurality of user equipments that are communicatively coupled to the base station and have a relative distance from the base station; decoding the second data signal from the first superimposed data signal; If decoding of the second data signal fails, sending an unconfirmed hybrid automatic repeat request feedback to the base station; receiving a second superimposed data signal from the base station, the second superimposed data signal comprising the first data signal having a third transmit power superimposed on the second data signal having a fourth transmit power in response to unacknowledged hybrid automatic repeat request feedback sent to the base station; as well as combining the first superimposed data signal and the second superimposed data signal, and decoding the second data signal, Among them, in the combined first superimposed data signal and the second superimposed data signal, the first data signal is weakened or offset.

22. A method for use in a wireless communication network, comprising: receiving a first superimposed data signal from a base station, the base station sending a first data signal of a farther user equipment with a first transmission power, the farther user equipment being from a plurality of user equipments that are communicatively coupled to the base station and have a relative distance from the base station, the first data signal being superimposed on a second data signal of a closer user equipment among the plurality of user equipments with a second transmission power; decoding the first data signal from the first superimposed data signal; If decoding of the first data signal fails, sending an unconfirmed hybrid automatic repeat request feedback to the base station; receiving a second superimposed data signal from the base station, the second superimposed data signal comprising the first data signal having a third transmit power superimposed on the second data signal having a fourth transmit power in response to unacknowledged hybrid automatic repeat request feedback sent to the base station; as well as combining the first superimposed data signal and the second superimposed data signal, and decoding the first data signal, Among them, in the combined first superimposed data signal and the second superimposed data signal, the second data signal is weakened or offset.

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