TWI703831B - Channel state information feedback channel - Google Patents

Abstract

Example embodiments presented herein relate to an apparatus, for use in a user equipment, for providing Chanel State Information (CSI) feedback in a CSI Feedback Channel (CFCH) comprised in a self-contained frame structure.

Description

Channel status information feedback channel

The exemplary embodiment presented herein relates to a device for providing CSI feedback in a channel state information (CSI) feedback channel (CFCH) included in a self-contained frame structure used in a user equipment.

In 5G systems, a large number of multiple input multiple output (MIMO) can be used to enhance spectrum efficiency and coverage. In order to support a large number of MIMO, the user equipment (UE) may need to report channel status information (CSI) to the eNodeB, which may include beam index (BI), ordering indicator (RI), precoding matrix indicator (PMI), channel Quality indicator (CQI) and so on.

100‧‧‧Electronic device

102‧‧‧Application circuit

104‧‧‧Baseband circuit

104a‧‧‧Baseband processor

104b‧‧‧Baseband processor

104c‧‧‧Baseband processor

104d‧‧‧Baseband processor

104e‧‧‧Central Processing Unit

104f‧‧‧Audio Digital Signal Processor

104g‧‧‧Memory/Storage

106‧‧‧RF circuit

106a‧‧‧Mixer circuit

106b‧‧‧Amplifier circuit

106c‧‧‧Filter circuit

106d‧‧‧Synthesizer circuit

108‧‧‧Front-end module circuit

110‧‧‧antenna

200‧‧‧Self-contained frame structure

201‧‧‧Physical downlink shared channel

202‧‧‧Physical uplink shared channel

203‧‧‧CSI feedback channel

600‧‧‧Hardware Resources

604‧‧‧ Peripherals

606‧‧‧Database

608‧‧‧Internet

610‧‧‧Processor

612‧‧‧Processor

614‧‧‧Processor

620‧‧‧Memory/Storage Device

630‧‧‧Communication Resources

640‧‧‧Bus

650‧‧‧Command

The foregoing will be apparent from the following more detailed description of the exemplary embodiment, as shown in the accompanying drawings, in which similar reference signs refer to the same parts in different drawings. The drawing is not necessarily to scale, but instead focuses on showing the exemplary embodiment.

Figure 1 is an illustrative example of a self-contained frame structure; Figures 2 and 3 are illustrative examples of a self-contained frame structure featuring channel status information feedback channels (CFCH), based on some of the exemplary embodiments; fourth Figures are illustrative examples of aggregated sub-frames, according to some of the example embodiments; Figures 5 and 6 are example configurations of hardware resources that can be provided in any node or logic, according to some of the example embodiments; and FIG. 7 is a flowchart depicting an example operation that can be performed by the electronic device or user equipment of FIGS. 5 and 6, according to some of the example embodiments.

[Content and Implementation of the Invention]

In the following description, for illustrative and non-limiting purposes, specific details are stated, such as specific components, elements, techniques, etc., in order to provide a thorough understanding of example embodiments. However, the exemplary embodiment may be implemented in other ways that deviate from these specific details. In other examples, detailed descriptions of well-known methods and components are omitted so as not to obscure the description of the exemplary embodiment.

System overview: In an embodiment, this disclosure may be related to LTE Rel-14 and 5G SI. The exemplary embodiments presented herein are aimed at providing CSI feedback in the Channel Status Information (CSI) Feedback Channel (CFCH).

In 5G systems, a large number of multiple input multiple output (MIMO) can be used to enhance spectrum efficiency and coverage. To support For a large number of MIMO, the user equipment (UE) may need to report its channel state information (CSI) to the eNodeB, which may contain beam index (BI), ordering indicator (RI), precoding matrix indicator (PMI), channel Quality indicator (CQI) and so on. Since transmit (Tx) beamforming and receive (Rx) beamforming can be applied to a large number of MIMO, the method of reporting the CSI to the eNodeB by the Tx and Rx beamforming may be a problem.

Furthermore, the new frame structure can be used in the 5G system, which can help achieve low latency and implement flexible duplex operation. An example of this new frame structure is shown in Figure 1, which can be called a self-contained frame structure. In the self-contained frame structure, data and its corresponding control information (including Downlink Control Information (DCI) and ACK/NACK feedback) can be sent in a sub-frame. Then how to report the CSI in the new frame structure may be a problem.

Figure 1 shows an example of a self-contained frame structure 200. The frame structure 200 can be formatted for a physical downlink shared channel (PDSCH) 201 or a physical uplink shared channel (PUSCH) 202. The frame structure 200 may have specific resource elements for carrying information. For example, physical downlink control channel (PDCCH), demodulation reference signal (DMRS), and acknowledgement/negative acknowledgement (ACK/NACK). The self-contained frame structure is advantageous because it reduces the latency.

It should be understood that the self-contained frame structure does not include a means for reporting CSI feedback data. Usually the UE will send CSI feedback via the PUSCH. However, the PUSCH is not always available and the UE It does not always have sufficient resources to send CSI feedback via the PUSCH. By using a large number of MIMO, the number of communication antennas may be very large. Therefore, for example, there is an increasing need to report CSI feedback in order to provide beam tracking or beamforming in an efficient manner.

Therefore, this exemplary embodiment provides a means for allowing the UE to send CSI feedback in a reliable manner. Therefore, the exemplary embodiment presented herein is for a UE that provides CSI feedback via a dedicated CSI feedback channel (CFCH). At least one example advantage of the CFCH is that the UE will be able to provide CSI feedback in a more reliable manner. For example, the UE may provide such feedback in a periodic manner.

Figure 2 shows a self-contained frame structure featuring dedicated CFCH 203. In the example provided in Figure 2, the frame structure is formatted for PDSCH. Figure 3 shows another example of a self-contained structure featuring dedicated CFCH 203. In the example provided in Figure 3, the frame structure is formatted for PUSCH.

According to some of the exemplary embodiments, providing the CFCH may include three concepts. First, the generated CSI sequence channel can be provided. After that, the resource mapping of the CFCH can be provided. Finally, the downlink control signaling of the CFCH can be established.

The rest of this article is arranged as follows. First, various exemplary embodiments of CSI sequence channel generation are discussed under the heading "CSI Sequence Generation". Afterwards, various example embodiments regarding resource allocation are provided under the heading "Resource Mapping". Various exemplary embodiments for controlled signaling are provided under the heading "Downlink Controlled Signaling". Fuck An example configuration of the node used to implement this example embodiment is provided under the heading "Example Configuration". Example operation procedures of nodes according to some of the example embodiments are provided under the heading "Example Operation". Finally, various examples of the embodiments presented herein are provided under the heading "Working Examples".

CSI sequence generation: The procedure for generating the CSI feedback channel (CFCH) signal may include channel coding, scrambling, modulation, layer mapping and precoding, and resource mapping. For this channel coding, cyclic redundancy check (CRC) and truncated traditional code (TBCC) can be used. The scrambling can be based on the cell ID. Quadrature phase shift keying (QPSK) can be applied for modulation. A single layer can be used and the CFCH can be based on beamforming. For resource mapping, a UE can independently occupy a group of subcarriers in the CFCH area. Examples for signal generation may include channel coding and modulation as follows.

CSI including BI, RI, PMI, and CQI can be a payload for channel coding with CRC coding. In a subframe, the UE may need to report the CSI and ACK/NACK to the eNodeB. In this case, the ACK/NACK can be sent in the CFCH associated with the CSI.

According to some of the exemplary embodiments, the CSI feedback is followed by the CSI-RS transmission without obvious scheduling or triggering. For example, when the CSI-RS for CSI-RS group 1 is scheduled/triggered to be transmitted in the current transmission time interval (TTI), then the CSI feedback for UEs in this CSI-RS group is expected It is sent back in the CFCH of the same TTI. This exemplary embodiment provides automatic triggering of reports. For example, reporting can occur in the next available channel. Therefore, there is no need for downlink for this CSI feedback Link assignment.

According to some of the exemplary embodiments, for a TTI with physical downlink shared channel (PDSCH) transmission, the CFCH is time division multiplexed (TDMed) processed with the ACK/NACK symbol. The UE will perform the downlink PDSCH data decoding procedure and simultaneously transmit the CFCH. In this case, the UE processing requirements can be relaxed, or the gap can be reduced to include only Tx/Rx switching time and round trip time (RTT).

According to some of the exemplary embodiments, the analog beamforming weight used to send the CFCH at the UE will use the same analog weight used to receive the channel state information-reference signal (CSI-RS). The analog beamforming weight used to receive the CFCH at the eNB will follow the same beam direction as the CSI-RS transmission. Therefore, the same beamforming weight will be used for communication transmission and reception. Therefore, the eNodeB will know which beamforming weight to use when receiving communications.

According to some of the exemplary embodiments, if the CSI and PDSCH are triggered in a downlink assignment and both are enabled, the CFCH payload can include CSI and ACK/NACK and the CRC and TBCC can be used Encode the payload. Alternatively, because the requirements for the quality of ACK/NACK are higher than CSI, different channel coding schemes can be used between ACK/NACK and CSI. The ACK/NACK can use a lower coding rate. According to some of the exemplary embodiments, a repetition code can be applied to the ACK/NACK bit. Subsequently, the encoded ACK/NACK and CSI bits can be gathered as input for TBCC encoding.

According to some of the exemplary embodiments, if the CSI and PDSCH Triggered in different downlink assignments, the discontinuous reception (DTX) situation may cause a mismatch in payload size. Then the UE can always keep the ACK/NACK bit area in the CSI, regardless of whether ACK/NACK feedback is required. In this case, the ACK/NACK bit can be set to a default, for example, 0. Therefore, the payload size will be matched.

According to some of the exemplary embodiments, the ACK/NACK can be implicitly sent in the CRC. There may be a total of K types of CRC sequences, where K=2 ^N and N means the maximum number of ACK/NACK bits. Then different ACK/NACK bit values can result in different CRC sequences for CSI. If the PDSCH is not scheduled, the UE can treat all ACK/NACK bits as all zeros. Table 1 shows an example of a CRC sequence for the case of a maximum of 2 ACK/NACK bits, where C _j indicates the jth CRC sequence.

In another embodiment, the ACK/NACK may be implicitly sent in the CFCH reference signal (RS). The CFCH RS can be generated as in (1).

s' ( m ) = s ( m ) d (1)

Here s ( m ) indicates the base sequence used for CFCH RS, which can be generated based on the cell ID; d can be obtained by the ACK/NACK bit and an example for the case of 2 bits is shown in Table 2. in.

For the downlink data aggregation subframe structure shown in Figure 4, there may be a large number of ACK/NACK bits to report. According to some of the exemplary embodiments, the ACK/NACK bundling can be used when the ACK/NACK associated with the CSI is sent by the CFCH as in the above embodiment. Then if one of the aggregated subframes has a NACK for one codeword, the NACK can be sent for this codeword; otherwise, the ACK can be sent.

Alternatively, multiple CFCH resources can be allocated to one UE, which can be used to carry some information on the ACK/NACK. If the number of aggregated subframes is very large, ACK/NACK multiplexing can be applied. For example, if two aggregated sub-frames are applied, there may be a total of 4 ACK/NACK bits in return. The first two ACK/NACK bits can be used to determine the resource index of the CFCH, and the last two ACK/NACK bits can be used to determine the CFCH RS, as shown in Table 2.

Resource mapping: There may be S symbols used in CFCH, which can be the same in the network or controlled by radio resources (RRC) Sending or sharing the physical layer control channel for configuration. Figures 2 and 3 show possible locations for this CFCH. According to some of the exemplary embodiments, for the downlink data subframe, the CFCH may be adjacent to the ACK/NACK channel and for the uplink data subframe, the CFCH may share the channel on the physical uplink (PUSCH) later.

According to some of the exemplary embodiments, when the UE sending the CFCH does not have PUSCH allocation, the CFCH may be used after PUSCH transmission using individual symbols. When the UE sending the CFCH has a PUSCH allocation, the CSI information can be encapsulated in the same MAC service data unit (MSDU) as the data transmission, and sent through the PUSCH. In this case, there may not be a need for individual CFCH.

According to some of the exemplary embodiments, the UE may use g subcarriers in the CFCH symbol to report its CSI, where g may be indicated by the downlink control information (DCI), where the CFCH aggregation level indicates The symbol can be used to indicate the number of g. Examples of the CFCH aggregation level index are shown in Table 3.

The starting subcarrier for each UE can be configured by RRC signaling or according to the hash letter of the Radio Network Temporary Identification (RNTI) The number is calculated. If the total number of CFCH symbols exceeds 1, the symbol index of the CFCH used for the UE can be indicated by RRC signaling or DCI. A UE can only use one symbol for CSI report.

As a further extension, the aggregation level used for the CFCH transmission may be fixed. In one example, the system bandwidth can be equally divided into M aggregate levels, or sub-bands, and M can be configured by the network or the RRC signaling. The CFCH used for one UE can occupy one sub-band. The sub-band index used for the CFCH transmission may be clearly indicated in the DCI format or provided by higher layers via RRC signaling. Alternatively, the sub-band index used for the CFCH transmission can be defined as a function of symbol/time slot/subframe/frame index and/or C-RNIT and/or cell ID or virtual cell ID. The CFCH reference signal (RS) can be generated according to the cell ID or virtual cell ID, and it can transmit the CFCH associated with the same Tx beam.

Downlink control signaling: For each PUSCH Tx, the UE may need to know whether the symbols reserved for the CFCH can be used by the PUSCH. According to some of the exemplary embodiments, the CFCH can be periodic, which means that if equation (2) is true, the PUSCH can reserve the symbol for the CFCH; otherwise, no symbol can be reserved for the CFCH. For aperiodic CSI feedback, it can be reported by PUSCH. The CFCH period and subframe offset can be configured by RRC signaling.

n _sf modT=T _offset (2)

Here n _sf indicates the number of sub-frames; T indicates the CFCH period; and T _{offset indicates} the sub-frame offset.

According to some of the exemplary embodiments, an indicator can be added to the uplink grant to show whether the CFCH is enabled. If it is enabled, the UE may reserve the symbol for CFCH; otherwise, the UE may not reserve the symbol for CFCH. Alternatively, the common physical layer channel can be used to indicate the number of symbols used for CFCH in a subframe.

According to some of the exemplary embodiments, for a UE with CSI report and PUSCH resources, it can transmit the CSI by PUSCH instead of CFCH, regardless of whether the CSI is periodic or aperiodic. If the number of CSI bits is high, the eNodeB can schedule PUSCH to report the CSI.

Example configuration: As used herein, the term "circuit" can mean part of or include application specific integrated circuits (ASIC), electronic circuits, processors (shared, dedicated, or group), and/or memory ( Shared, dedicated, or group), which executes one or more software or firmware programs, combinational logic circuits, and/or other suitable hardware components that provide the functions. In some embodiments, the circuit can be implemented in one or more software or firmware modules or the functions associated with the circuit can be implemented by the one or more software or firmware modules. In some embodiments, the circuit may include logic, and at least part of it may be operated in hardware.

The embodiments described herein can be implemented into a system by using any suitably configured hardware and/or software. Figure 5 shows exemplary components of the electronic device 100 for one embodiment. In an embodiment, the electronic device 100 can be, can be implemented, can be incorporated, or can be used in other ways Part of user equipment (UE), evolved NodeB (eNB), or other wireless communication equipment. In some embodiments, the electronic device 100 may include an application circuit 102, a baseband circuit 104, a radio frequency (RF) circuit 106, a front-end module (FEM) circuit 108, and one or more antennas 110, which are coupled at least as shown together.

The application circuit 102 may include one or more application processors. For example, the application circuit 102 may include circuits such as, but not limited to, one or more single-core or multi-core processors. The processor(s) may include any combination of general-purpose processors and special-purpose processors (for example, graphics processors, application processors, etc.). The processor may be coupled to and/or may include memory/storage and may be configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems to operate on the system .

The baseband circuit 104 may include circuits such as, but not limited to, one or more single-core or multi-core processors. The baseband circuit 104 may include one or more baseband processors and/or control logic for processing the baseband signal received from the receive signal path of the RF circuit 106 and for generating the transmit signal path for the RF circuit 106 The fundamental frequency signal. The baseband processing circuit 104 can interface with the application circuit 102 for generating and processing the baseband signal and for controlling the operation of the RF circuit 106. For example, in some embodiments, the baseband circuit 104 may include a second generation (2G) baseband processor 104a, a third generation (3G) baseband processor 104b, a fourth generation (4G) baseband processor 104c, And/or other baseband processors 104d used in other current generations, developing or future generations (for example, fifth generation (5G), 6G, etc.). The baseband circuit 104 (for example, the baseband processor 104a-d One or more) can handle various radio control functions that enable communication with one or more radio networks via the RF circuit 106. The radio control function may include, but is not limited to, signal modulation/demodulation, encoding/decoding, radio frequency shifting, etc. In some embodiments, the modulation/demodulation circuit of the baseband circuit 104 may include fast Fourier transform (FFT), precoding, and/or cluster mapping/demapping functions. In some embodiments, the encoding/decoding circuit of the baseband circuit 104 may include convolution, truncated convolution, turbo, Viterbi, and/or low-density parity checking (LDPC) encoder/decoder functions. The embodiments of modulation/demodulation and encoder/decoder functions are not limited to these examples and may include other suitable functions in other embodiments.

In some embodiments, the baseband circuit 104 may include protocol stacking elements, such as, for example, elements of the Evolved Universal Terrestrial Radio Access Network (EUTRAN) protocol, including, for example, physical (PHY) and medium access control (MAC) , Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), and/or Radio Resource Control (RRC) components. The central processing unit (CPU) 104e of the baseband circuit 104 can be configured to operate the elements of the protocol stack for the PHY, MAC, RLC, PDCP and/or RRC layer signaling. In some embodiments, the baseband circuit may include one or more audio digital signal processors (DSP) 104f. The audio DSP 104f may include components for compression/decompression and echo cancellation and may include other suitable processing components in other embodiments.

The baseband circuit 104 may further include a memory/storage 104g. The memory/storage 104g can be used to load and store data and/or instructions for operations performed by the processor of the baseband circuit 104. memory The volume/storage may include any combination of suitable volatile memory and/or non-volatile memory for one embodiment. The memory/storage 104g may include any combination of various levels of memory/storage, including but not limited to read-only memory (ROM) with embedded software instructions (for example, firmware), random access memory ( For example, dynamic random access memory (DRAM)), cache memory, buffer, etc. The memory/storage 104g can be shared among the various processors or dedicated to a specific processor.

The components of the baseband circuit can be suitably combined in a single chip, a single chip group, or in some embodiments are arranged on the same circuit board. In some embodiments, some or all of the constituent components of the baseband circuit 104 and the application circuit 102 may be implemented together on, for example, a system-on-chip (SOC).

In some embodiments, the baseband circuit 104 may provide communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuit 104 can support and Evolve Universal Terrestrial Radio Access Network (EUTRAN) and/or other wireless metropolitan area networks (WMAN), wireless local area networks (WLAN), wireless personal Local area network (WPAN) communications. An embodiment in which the baseband circuit 104 is configured to support radio communications of more than one wireless protocol may be referred to as a multi-mode baseband circuit.

The RF circuit 106 can enable communication with wireless networks through non-solid media by using modulated electromagnetic radiation. In various embodiments, the RF circuit 106 may include switches, filters, amplifiers, etc. to facilitate communication with the wireless network. The RF circuit 106 may include a receiving signal path, which may A circuit is included to down-convert the RF signal received from the FEM circuit 108 and provide the base frequency signal to the base frequency circuit 104. The RF circuit 106 may also include a transmission signal path, which may include circuits to up-convert the baseband signal provided by the baseband circuit 104 and provide an RF output signal to the FEM circuit 108 for transmission.

In some embodiments, the RF circuit 106 may include a receiving signal path and a transmitting signal path. The receiving signal path of the RF circuit 106 may include a mixer circuit 106a, an amplifier circuit 106b, and a filter circuit 106c. The transmission signal path of the RF circuit 106 may include a filter circuit 106c and a mixer circuit 106a. The RF circuit 106 may also include a synthesizer circuit 106d for synthesizing frequencies for use by the mixer circuit 106a of the receiving signal path and the transmitting signal path. In some embodiments, the mixer circuit 106a of the receive signal path may be configured to down-convert the RF signal received from the FEM circuit 108 according to the synthesized frequency provided by the synthesizer circuit 106d. The amplifier circuit 106b may be configured to amplify the down-converted signal and the filter circuit 106c may be a low-pass filter (LPF) or band configured to remove unwanted signals from the down-converted signal to generate an output fundamental frequency signal. Pass filter (BPF). The output baseband signal can be provided to the baseband circuit 104 for further processing. In some embodiments, the output fundamental frequency signal may be a zero frequency fundamental frequency signal, although this is not required. In some embodiments, the mixer circuit 106a of the receive signal path may include a passive mixer, although the scope of the embodiment is not limited to this aspect.

In some embodiments, the mixer of the transmit signal path The circuit 106a may be configured to up-convert the input fundamental frequency signal according to the synthesized frequency provided by the synthesizer circuit 106d to generate the RF output signal for the FEM circuit 108. The baseband signal can be provided by the baseband circuit 104 and can be filtered by the filter circuit 106c. The filter circuit 106c may include a low-pass filter (LPF), although the scope of the embodiment is not limited to this aspect.

In some embodiments, the mixer circuit 106a of the receiving signal path and the mixer circuit 106a of the transmitting signal path may include two or more mixers and can be separated for quadrature down conversion and/or up conversion.地Configuration. In some embodiments, the mixer circuit 106a of the receiving signal path and the mixer circuit 106a of the transmitting signal path may include two or more mixers and may be configured for image rejection (for example, Hartley image rejection). In some embodiments, the mixer circuit 106a and the mixer circuit 106a of the receiving signal path may be configured separately for direct down conversion and/or direct up conversion. In some embodiments, the mixer circuit 106a of the receive signal path and the mixer circuit 106a of the transmit signal path may be configured for superheterodyne operation.

In some embodiments, the output fundamental frequency signal and the input fundamental frequency signal may be analog fundamental frequency signals, although the scope of the embodiment is not limited to this aspect. In some alternative embodiments, the output fundamental frequency signal and the input fundamental frequency signal may be digital fundamental frequency signals. In these alternative embodiments, the RF circuit 106 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuits, and the baseband circuit 104 may include a digital baseband interface to communicate with the RF circuit 106.

In some dual-mode embodiments, individual radio IC circuits may be provided to process signals for each spectrum, although the scope of this embodiment is not limited to this aspect.

In some embodiments, the synthesizer circuit 106d may be a fractional N synthesizer or a fractional N/N+1 synthesizer, although the scope of this embodiment is not limited to this aspect, because other types of frequency synthesizers may be suitable. For example, the synthesizer circuit 106d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer including a phase-locked loop with a frequency divider.

The synthesizer circuit 106d may be configured to synthesize the output frequency according to the frequency input and the frequency divider control input for use by the mixer circuit 106a of the RF circuit 106. In some embodiments, the synthesizer circuit 106d may be a fractional N/N+1 synthesizer.

In some embodiments, the frequency input may be provided by a voltage controlled oscillator (VCO), although that is not required. The frequency divider control input can be provided by the baseband circuit 104 or the application processor 102 depending on the required output frequency. In some embodiments, the frequency divider control input (eg, N) can be determined from a lookup table based on the channel indicated by the application processor 102.

The synthesizer circuit 106d of the RF circuit 106 may include a frequency divider, a delay locked loop (DLL), a multiplexer, and a phase accumulator. In some embodiments, the frequency divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DPA). In some embodiments, the DMD may be configured to divide the input signal by N or N+1 (for example, according to an output) to provide a division ratio. In some example embodiments, the DLL may include a set of stages Cascaded, adjustable, delay element, phase detector, charge pump and D-type flip-flop. In these embodiments, the delay element can be configured to break the VCO period into Nd equal phase packets, where Nd is the number of delay elements in the delay line. In this way, the DLL provides negative feedback to help ensure that the total delay through the delay line is one VCO cycle.

In some embodiments, the synthesizer circuit 106d may be configured to generate a carrier frequency as the output frequency. However, in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, the Four times the carrier frequency) and used with a quadrature generator and frequency divider circuit to generate a plurality of signals with different phases relative to each other at the carrier frequency. In some embodiments, the output frequency may be the LO frequency (fLO). In some embodiments, the RF circuit 106 may include an IQ/polarity converter.

The FEM circuit 108 may include a received signal path, which may include a circuit configured to manipulate the RF signal received from one or more antennas 110, amplify the received signal, and provide an amplified version of the received signal to the RF circuit 106 for supply Further processing. The FEM circuit 108 may also include a transmission signal path, which may include a circuit configured to amplify the signal for transmission provided by the RF circuit 106 for transmission by one or more of the one or more antennas 110.

In some embodiments, the FEM circuit 108 may include a TX/RX switch to switch between transmission mode and reception mode operation. The FEM circuit may include a receiving signal path and a transmitting signal path. The FEM The receive signal path of the circuit may include a low noise amplifier (LNA) to amplify the received RF signal and provide the amplified received RF signal as an output (for example, to the RF circuit 106). The transmit signal path of the FEM circuit 108 may include a power amplifier (PA) to amplify the input RF signal (e.g., provided by the RF circuit 106), and one or more filters to generate the RF signal for subsequent transmission (e.g., By one or more of one or more antennas 110).

In some embodiments, the electronic device 100 may include additional components, such as, for example, memory/storage, display, camera, sensor, and/or input/output (I/O) interface.

In embodiments where the electronic device 100 is, implemented, incorporated, or otherwise part of a UE (or part of it), the baseband circuit 104 can be used to generate CSI sequences and provide resource mapping for CSI feedback aisle. The RF circuit 106 can be used to report the CSI measured by the UE.

Figure 6 is a block diagram showing the ability to read instructions from a machine-readable or computer-readable medium (for example, a machine-readable storage medium) according to some example embodiments, and implement any one of the methods discussed herein. More components. Specifically, Figure 6 shows a graphical representation of a hardware resource 600 including one or more processors (or processor cores) 610, one or more memory/storage devices 620, and one or more communication resources 630 , Each of them is communicatively coupled via the bus 640.

Processor 610 (for example, central processing unit (CPU), reduced instruction set computing (RISC) processor, complex instruction set computing (CISC) processor, graphics processing unit (GPU), such as baseband processing The digital signal processor (DSP), application specific integrated circuit (ASIC), radio frequency integrated circuit (RFIC), another processor, or any suitable combination thereof) of the processor may include, for example, a processor 612 and a processor 614. The memory/storage device 620 may include main memory, magnetic disk storage, or any suitable combination thereof.

The communication resource 630 may include interconnection and/or network interface components or other suitable devices to communicate with one or more peripheral devices 604 and/or one or more database 606 via the network 608. For example, the communication resource 630 may include wired communication components (for example, for coupling via a universal serial bus (USB)), cellular communication components, near field communication (NFC) components, Bluetooth® components (for example, Bluetooth® low Power consumption), Wi-Fi® components, and other communication components.

The instructions 650 may include software, programs, applications, applets, mobile applications (app), or other executable code for causing at least any of the processors 610 to perform any or more of the methods discussed herein . The instruction 650 may be completely or partially resident in at least one of the processor 610 (for example, in the cache memory of the processor), the memory/storage device 620, or any suitable combination thereof. In addition, any part of the instruction 650 can be transferred to the hardware resource 600 from any combination of the peripheral device 604 and/or the database 606. Therefore, the memory of the processor 610, the memory/storage device 620, the peripheral device 604, and the database 606 are examples of computer-readable and machine-readable media.

Example operation: Figure 7 is a flowchart depicting an example operation, which can be used by the electronic device or equipment in Figures 5 and 6 CSI feedback is provided in the CSI feedback channel (CFCH) included in the self-contained frame structure. It should be understood that the operations in Figure 7 need not be performed in order. Furthermore, it should be understood that not all of this operation needs to be performed. The example operations may be performed in any order and in any combination.

Operation 10

The device 100 generates 10 CSI sequences for the payload of the CFCH. The processing or application circuit generates a CSI sequence for the CFCH payload. Operation 10 is further described under at least the heading "CSI Sequence Generation".

According to some of the exemplary embodiments, the device 100 or the processing or application circuit provides the value of the CSI sequence in the form of ACK/NACK indicated by the sent CRC sequence. According to some of the exemplary embodiments, the CSI sequence in the form of ACK/NACK is multiplexed in a plurality of subframes. According to some of the exemplary embodiments, the device, or processing or application circuit is further configured to aggregate the ACK/NACK and the CSI feedback.

Operation 12

The device 100 also maps 12 resources for uplink data transmission in the CFCH. The processing circuit maps the resources used for uplink data transmission in the CFCH. Operation 12 is further described under at least this heading "Resource Mapping".

According to some of the exemplary embodiments, the self-contained frame structure includes a physical uplink shared channel (PUSCH) and the processing circuit maps the resource in the PUSCH in the available uplink symbols or in the payload of the CFCH . According to some of the exemplary embodiments, the processing circuit maps the resource in the CFCH, where the CFCH is after the PUSCH. According to some of the exemplary embodiments, the processing circuit maps the resource in the CFCH, and feeds back in the same media access control service data unit (MSDU) as the data transmission by placing the CSI.

According to some of the exemplary embodiments, the self-contained frame structure includes a physical downlink shared channel (PDSCH). The PDSCH and CSI feedback are triggered in a downlink assignment. The processing circuit maps resources in the payload of the CFCH, where the CSI sequence in the payload includes the CSI feedback and acknowledgement/negative acknowledgement (ACK/NACK).

According to some of the exemplary embodiments, the self-contained frame structure includes a plurality of aggregated sub-frames.

According to some of the exemplary embodiments, the processing circuit receives Downlink Control Information (DCI). The DCI contains the CFCH aggregation level indicator. The processing circuit determines the number of subcarriers used for reporting the CSI feedback in the CFCH symbol according to the received CFCH aggregation level.

Operation 14

According to the mapped resource, the device reports 14 in the CFCH that the CSI containing the generated CSI sequence is fed back to the base station. The processing or radio frequency circuit reports the packet in the CFCH according to the mapped resource The CSI containing the generated CSI sequence is fed back to the base station. Operation 14 is further described under at least the heading "Downlink Control Signaling".

According to some of the exemplary embodiments, the processing circuit receives the uplink grant. If the uplink grant indicates that the CFCH is enabled, the application circuit reserves symbols for the CFCH in the self-contained frame structure.

According to some of the exemplary embodiments, the self-contained frame structure includes PUSCH and the processing circuit reserves symbols in the PUSCH for the CFCH.

According to some of the exemplary embodiments, the processing circuit reserves the symbol in the PUSCH for the CFCH. The reservation is implemented when the condition is determined to be satisfied. According to some of the exemplary embodiments, this condition may be n _sf modT=T _offset , where n _sf indicates the number of sub-frames in the self-contained frame structure, T indicates the CFCH period, and T _offset indicates the sub-frame Frame offset.

According to some of the exemplary embodiments, the processing circuit reports the CSI feedback in the same transmission time interval (TTI) in which the CSI reference signal (CSI-RS) is received.

Working example: Example 1 may include a method that includes configuring the channel status information (CSI) feedback channel (CFCH) and reporting the CSI measured by the UE.

In Example 2, the subject of Example 1 or any of the examples or clauses described herein may further include the number of symbols used for CFCH may be configured by the network or Radio Resource Control (RRC) signaling.

In example 3, it may include example 1 and/or as described herein Any other example or method of clause, in which the UE can send its CSI and ACK/NACK by CFCH when the PUSCH resource used for the current subframe is not permitted; otherwise, the UE can use MAC service data unit via PUSCH (SDU) Send the CSI.

Example 4, which may include the method of Example 3 and/or any of the other examples or clauses, wherein the ACK/NACK and CSI may use the same channel coding scheme.

Example 5, which may include the method of Example 3 and/or any of the other examples or clauses, wherein regardless of whether the UE needs to report the ACK/NACK, the corresponding bit may need to be reserved for the ACK/NACK.

Example 6, which may include the method of Example 3 and/or any of the other examples or clauses, wherein the CFCH may use several cyclic redundancy check (CRC) codes and the index for the CRC code may be determined by the ACK/NACK Value.

Example 7, which may include the method of Example 3 and/or any of the other examples or clauses, wherein the reference signal (RS) used for CFCH may be generated based on the cell ID or virtual cell ID and the ACK/NACK bit .

Example 8, which may include the method of Example 1 and/or any of the other examples or clauses, wherein the CFCH symbol may be before the ACK/NACK symbol in the downlink data subframe and in the uplink data subframe After the PUSCH symbol in the frame.

Example 9, which may include Example 8 and/or any of the other Examples or clauses of the method in which the UE can send its CFCH in the subcarriers in the CFCH symbol.

Example 10, which may include the method of Example 9 and/or any of the other examples or clauses, wherein the start index of the subcarrier for each UE can be configured by the RRC signaling or temporarily identified by the radio network of the UE ( RNTI) function to be calculated.

Example 11, which may include the method of Example 9 and/or any of the other examples or clauses, wherein the aggregation level of the subcarriers can be configured by the network, RRC signaling, or downlink control information (DCI).

Example 12, which may include the method of Example 1 and/or any of the other examples or clauses, wherein the CFCH can be periodically enabled and the period and subframe offset can be configured by the network or RRC signaling.

Example 13 may include channel status information (CSI) feedback methods, including generating CSI sequences, identifying resource mapping for CSI feedback channel (CFCH), and reporting the CSI measured by the UE.

Example 14, which may include the method of Example 13 and/or any of the other examples or clauses, and further includes signaling downlink control of the CSI feedback channel.

Example 15, which may include the method of Example 13 and/or any of the other examples or clauses, wherein the number of symbols used for CFCH can be configured by the network or Radio Resource Control (RRC) signaling.

In example 16, it may include the method of example 13 and/or any of the other examples or clauses, in which the UE may send its CSI and CFCH if the PUSCH resource used for the current subframe is not permitted. ACK/NACK; otherwise, the UE can send the CSI by using MAC Service Data Unit (SDU) via PUSCH.

Example 17, which may include the method of Example 16 and/or any of the other examples or clauses, wherein the ACK/NACK and CSI may use the same channel coding scheme.

Example 18, which may include the method of Example 16 and/or any of the other examples or clauses, wherein regardless of whether the UE needs to report the ACK/NACK, the corresponding bit may need to be reserved for the ACK/NACK.

Example 19, which may include the method of Example 16 and/or any of the other examples or clauses, wherein the CFCH may use several cyclic redundancy check (CRC) codes and the index for the CRC code may be determined by the ACK/NACK Value.

Example 20, which may include the method of Example 16 and/or any of the other examples or clauses, wherein the reference signal (RS) used for CFCH may be generated based on the cell ID or virtual cell ID and the ACK/NACK bit .

Example 21, which may include the method of Example 13 and/or any of the other examples or clauses, wherein the CFCH symbol may precede the ACK/NACK symbol in the downlink data subframe and in the uplink data subframe After the PUSCH symbol in the frame.

Example 22, which may include the method of Example 21 and/or any of the other examples or clauses, wherein the UE may transmit its CFCH in a subcarrier in the CFCH symbol.

Example 23, which may include the method of Example 22 and/or any of the other examples or clauses, wherein the starting index of the subcarrier for each UE can be configured by the RRC signaling or temporarily identified by the UE's radio network ( RNTI) function to be calculated.

Example 24, which may include the method of Example 22 and/or any of the other examples or clauses, wherein the aggregation level of the subcarriers can be configured by the network, RRC signaling, or downlink control information (DCI).

Example 25, which may include the method of Example 13 and/or any of the other examples or clauses, wherein the CFCH can be periodically enabled and the period and subframe offset can be configured by the network or RRC signaling.

Example 26 may include an electronic device, including: a baseband circuit for generating CSI sequences and providing resource mapping for CSI feedback channels; and a radio frequency (RF) circuit coupled with the baseband circuit for reporting UE quantity CSI measured.

Example 27 may include a device, including means to perform the method described in or in relation to any of Examples 1-25, or one or more elements of any other method or procedure or clause described herein.

Example 28 may include one or more non-transitory computer-readable media containing instructions to cause the electronic device to execute the instructions described in or in relation to Examples 1-25 when the instructions are executed by one or more processors of the electronic device. Any method or one or more elements of any other method or procedure or clause described herein.

Example 29 may include equipment, including logic, modules, and/or circuits to perform the methods described in or related to any of Examples 1-25, Or one or more elements of any other method or procedure or clause described herein.

Example 30 may include a device including: one or more processors and one or more computer-readable media, the one or more computer-readable media including instructions, which when executed by the one or more processors Cause the one or more processors to perform the methods, techniques, or programs, or portions thereof, described in or in relation to any of Examples 1-25.

Example 31 may include a method of communicating in a wireless network, as shown and described herein and in any of Examples 1-25.

Example 32 may include a system to provide wireless communication, as shown and described herein.

Example 33 may include a device to provide wireless communication, as shown and described herein.

Example 34 may include a method for any of the claims 1-25, wherein the method is performed by a user equipment (UE) or a part thereof.

Further example embodiments are provided based on the terms of the following borders:

Clause 1: A device used in user equipment (UE) to provide CSI feedback in the channel state information (CSI) return channel (CFCH) included in the self-contained frame structure. The device contains a processing circuit to generate a CSI sequence for the CFCH payload. The processing circuit further maps resources used for uplink data transmission in the CFCH. According to some of the exemplary embodiments, the application circuit can perform the generation and mapping. The device further includes a processing circuit to, based on the mapped resource, The CSI including the generated CSI sequence reported in the CFCH in the self-contained frame structure is fed back to the base station. According to some of the exemplary embodiments, the radio frequency circuit can perform the report.

Clause 2: The device of Clause 1 and any of the other examples or clauses, wherein the processing is used to receive an uplink grant, and if the uplink grant indicates that the CFCH is enabled, the processing circuit is used in the self-contained Symbols are reserved for the CFCH in the frame structure.

Clause 3: The device of any of clauses 1-2 or any of the other examples or clauses, wherein the self-contained frame structure includes a physical uplink shared channel (PUSCH) and the processing circuit is further used for preprocessing in the PUSCH Leave the symbol for the CFCH.

Clause 4: The device of Clause 3 or any of the other examples or clauses, wherein the processing circuit is used to reserve the symbol in the PUSCH for the CFCH when the following conditions are met: n _sf modT=T _offset , where n _sf indicates the number of subframes in the self-contained frame structure, T indicates the CFCH period, and T _offset indicates the subframe offset.

Clause 5: The device of any of clauses 1-4 or any of the other instances or clauses, wherein the self-contained frame structure includes a physical uplink shared channel (PUSCH) and the processing circuit is further used for the available uplink The resource is mapped in the PUSCH in the symbol or in the payload of the CFCH.

Clause 6: The device of any of clauses 1-2 or any of the other examples or clauses, wherein the self-contained frame structure includes a physical downlink shared channel (PDSCH) and wherein the PDSCH and CSI are fed back together Is triggered in a downlink assignment, the processing circuit is further used to map the resource in the payload of the CFCH, where the CSI sequence in the payload includes the CSI feedback and acknowledgement/negative acknowledgement (ACK/NACK) .

Clause 7: The device of Clause 6 or any other example or clause, wherein the processing circuit is used to further aggregate the ACK/NACK and the CSI feedback.

Clause 8: Any of clauses 1-7 or any of the other instances or clauses described in the device, wherein the processing circuit is based on an acknowledgement/negative acknowledgement (ACK/NACK) indicated by a sent cyclic redundancy check (CRC) sequence The form provides the value of the CSI sequence.

Clause 9: Any of clauses 1-5 and 8, or any other instance or device of clauses, wherein the processing circuit is used to map the resource in the CFCH, which is in the physical uplink shared channel (PUSCH) after.

Clause 10: Any one of clauses 1-5 and 8 or any of the other instances or clauses described, wherein the self-contained frame structure includes a physical uplink shared channel (PUSCH) and the processing circuit is used in the CFCH The resource is mapped and fed back in the same media access control service data unit (MSDU) as the data transmission by placing the CSI.

Clause 11: Any of clauses 1-10 or any of the other instances or clauses described, wherein the self-contained frame structure includes a plurality of aggregated sub-frames.

Clause 12: The device of clause 11 or any other instance or clause described, wherein the processing circuit is configured to receive downlink control information (DCI), the DCI includes a CFCH aggregation level indicator, and the processing circuit is used to determine the number of subcarriers in the CFCH symbol for reporting the CSI feedback according to the received CFCH aggregation level.

Clause 13: Any of clauses 11-12 or any of the other instances or clauses described, wherein the CSI sequence in the form of an acknowledgement/negative acknowledgment (ACK/NACK) is contained in the plurality of aggregated subframes Multitasking.

Clause 14: Any of clauses 1-13 or any of the other instances or clauses described, wherein the processing circuit is configured to report the transmission time interval (TTI) in the same transmission time interval (TTI) in which the CSI reference signal (CSI-RS) is received CSI feedback.

Clause 15: A computer-readable storage machine containing executable instructions, such that when the readable instructions are executed by a user equipment (UE), the channel state information contained in the self-contained frame structure of the UE ( CSI) feedback channel (CFCH) provides CSI feedback. The instruction includes generating a CSI sequence for the payload of the CFCH and mapping resources for uplink data transmission in the CFCH. The instruction further includes reporting the CSI including the CSI sequence in the CFCH in the self-contained frame structure to feed back to the base station according to the mapped resource.

Clause 16: Clause 15 or any of the other examples or clauses mentioned in the computer-readable storage machine, wherein the self-contained frame structure includes a physical downlink shared channel (PDSCH), and wherein the PDSCH and CSI are fed back in a downlink Is triggered during route assignment, the processing circuit is further used to map the resource in the payload of the CFCH, wherein the The CSI sequence includes the CSI feedback and acknowledgement/negative acknowledgement (ACK/NACK).

Clause 17: A user equipment (UE) for providing CSI feedback in a channel state information (CSI) feedback channel (CFCH) included in a self-contained frame structure, the UE being used in a wireless communication network. The UE includes a processing circuit to generate a CSI sequence for the CFCH payload. The processing circuit further maps resources used for uplink data transmission in the CFCH. The UE further includes a radio frequency circuit to report the CSI including the generated CSI sequence to the base station in the CFCH in the self-contained frame structure according to the mapped resource.

Clause 18: The user equipment of clause 17 or any of the other examples or clauses, wherein the self-contained frame structure includes a physical downlink shared channel (PDSCH) and wherein the PDSCH and CSI feedback are combined in a downlink assignment When triggered, the processing circuit is further used to map the resource in the payload of the CFCH, wherein the CSI sequence in the payload includes the CSI feedback and acknowledgement/negative acknowledgement (ACK/NACK).

Clause 19: A method for providing CSI feedback in a channel state information (CSI) feedback channel (CFCH) included in a self-contained frame structure in a user equipment (UE) in a device. The method includes generating a CSI sequence for the CFCH payload. The method also includes mapping resources used for uplink data transmission in the CFCH. The method further includes reporting the CSI including the generated CSI sequence in the CFCH in the self-contained frame structure to feed back to the base station according to the mapped resource.

Clause 20: Clause 19 or any of the other examples or methods described in clauses, further comprising receiving an uplink grant, if the uplink grant indicates that the CFCH is enabled, reserving symbols in the self-contained frame structure for the CFCH.

Clause 21: A user equipment (UE) that includes any of clauses 1-14 or any of the other instances or clauses mentioned.

Clause 22: A device used in user equipment (UE) to provide CSI feedback in a channel state information (CSI) feedback channel (CFCH) included in a self-contained frame structure. The device includes means to generate the CSI sequence for the CFCH payload. The device further includes means for mapping resources for uplink data transmission in the CFCH. The device also includes a means for reporting the CSI including the generated CSI sequence in the CFCH in the self-contained frame structure to feed back to the base station according to the mapped resource.

Clause 23: The device of Clause 22 or any of the other examples or clauses mentioned hereinabove further includes a means for receiving an uplink grant. If the uplink grant indicates that the CFCH is enabled, the means is used in the self-contained Symbols are reserved for the CFCH in the frame structure.

Summary: throughout the description of this specification and the scope of the patent application, the words "include" and "contain" and their variations mean "including but not limited to", and they are not intended (and not) to exclude other parts, additives, Components, wholes or steps. In the description of this specification and the scope of the patent application, the singular includes the plural unless the context requires otherwise. In particular, where the indefinite article is used, the specification is understood to consider the plural and singular, Unless the context requires otherwise.

The features, wholes, characteristics, compounds, chemical parts or groups described in conjunction with the specific aspect, embodiment, or example of this exemplary embodiment should be understood to be applicable to any other aspect, embodiment, or group described herein. Examples, unless incompatible with them. All of the features disclosed in this specification (including any attached patent scope, abstract and drawings), and/or all of the steps of any method or procedure disclosed in this way, may be combined in any combination, except for such At least some combinations of features and/or steps are not mutually exclusive. This exemplary embodiment is not limited to the details of any of the foregoing embodiments. This example embodiment extends to any novelty, or any novel combination of the features disclosed in this specification (including any accompanying patent scope, abstract and drawings), or extends to any method or program disclosed in this way Any novelty, or any novel combination of the steps.

The reader's attention is focused on all the information and documents submitted with this application at the same time or before this specification and it is open for public inspection by this specification, and the contents of all such information and documents are incorporated herein by reference.

Claims (18)

A device used in user equipment (UE) to provide CSI feedback in a channel state information (CSI) feedback channel (CFCH) included in a self-contained frame structure, the device including: a processing circuit to: generate The CSI sequence used for the payload of the CFCH; the resources used for uplink data transmission are mapped in the CFCH; and according to the mapped resources, the CFCH report in the self-contained frame structure contains the generated The CSI of the CSI sequence is fed back to the base station. For example, the device in the scope of the patent application, in which the processing circuit is used to receive the uplink permission, if the uplink permission indicates that the CFCH is enabled, the processing circuit is used in the self-contained frame structure Reserve symbols for this CFCH. Such as the device of the first item of the patent application, wherein the self-contained frame structure includes a physical uplink shared channel (PUSCH) and the processing circuit is further used to reserve symbols in the PUSCH for the CFCH. For example, the device of item 3 of the scope of patent application, wherein the processing circuit is used to reserve the symbol in the PUSCH for the CFCH when the following conditions are met: n _sf modT = T _offset , where n _sf indicates that the self-contained The number of subframes in the frame structure, T indicates the CFCH period and T _offset indicates the subframe offset. Such as the device of the first item in the scope of the patent application, wherein the self-contained frame structure includes a physical uplink shared channel (PUSCH) and the processing circuit is further used in the PUSCH in the available uplink symbols or in the CFCH The resource is mapped in the payload. Such as the device of the first item of the patent application, where the self-contained frame structure contains real Body Downlink Shared Channel (PDSCH) and where the PDSCH and CSI feedback are triggered in a downlink assignment, the processing circuit is further used to map the resource in the payload of the CFCH, where in the payload The CSI sequence of includes the CSI feedback and acknowledgement/negative acknowledgement (ACK/NACK). For example, the device in the scope of the patent application, wherein the processing circuit is used to further aggregate the ACK/NACK and the CSI feedback. For example, the device of the first item in the scope of patent application, wherein the processing circuit provides the value of the CSI sequence in the form of an acknowledgement/negative acknowledgement (ACK/NACK) indicated by a sent cyclic redundancy check (CRC) sequence. For example, the device of the first item in the scope of patent application, wherein the processing circuit is used to map the resource in the CFCH, which is after the physical uplink shared channel (PUSCH). For example, the device in the scope of the patent application, wherein the self-contained frame structure includes a physical uplink shared channel (PUSCH) and the processing circuit is used to map the resource in the CFCH, and the feedback is the same as the data transmission by placing CSI The media access control service data unit (MSDU). For example, the device of the first item of the patent application, wherein the self-contained frame structure includes a plurality of aggregated sub-frames. For example, the device of claim 11, wherein the processing circuit is configured to receive Downlink Control Information (DCI), the DCI includes a CFCH aggregation level indicator; and the processing circuit is used for receiving the CFCH aggregation level according to the received CFCH , Determine the number of subcarriers used to report the CSI feedback in the CFCH symbol. Such as the equipment of item 11 of the scope of patent application, which is confirmed by confirmation/negation The CSI sequence in the form of (ACK/NACK) is multiplexed in the plurality of aggregated subframes. For example, the device of the first item of the patent application, wherein the processing circuit is used to report the CSI feedback in the same transmission time interval (TTI) in which the CSI reference signal (RS) is received. A computer-readable storage machine containing executable instructions, so that when the executable instructions are executed by a user equipment (UE), the channel status information (CSI) feedback channel included in the UE in a self-contained frame structure is caused (CFCH) provides CSI feedback. The instruction includes: generating a CSI sequence for the payload of the CFCH; mapping resources for uplink data transmission in the CFCH; and according to the mapped resources, in the self-contained mode The CSI including the CSI sequence reported in the CFCH in the frame structure is fed back to the base station. For example, the computer-readable storage machine of the 15th patent application, where the self-contained frame structure includes the physical downlink shared channel (PDSCH), and where the PDSCH and CSI feedback are triggered in a downlink assignment, The application circuit is further used to map the resource in the payload of the CFCH, wherein the CSI sequence in the payload includes the CSI feedback and acknowledgement/negative acknowledgement (ACK/NACK). A user equipment (UE) for providing CSI feedback in a channel state information (CSI) feedback channel (CFCH) included in a self-contained frame structure. The UE includes: a processing circuit for generating the CFCH The CSI sequence of the payload; the processing circuit further maps the resource used for uplink data transmission in the CFCH; and the radio frequency circuit is used to report in the CFCH that the asset is included according to the mapped resource The CSI of the generated CSI sequence is fed back to the base station. For example, the user equipment of the 17th patent application, wherein the self-contained frame structure includes physical downlink shared channel (PDSCH) and wherein the PDSCH and CSI feedback are triggered in a downlink assignment, the application circuit further It is used to map the resource in the payload of the CFCH, where the CSI sequence in the payload includes the CSI feedback and acknowledgement/negative acknowledgement (ACK/NACK).

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