TWI698134B - Network node and method for wireless communication system - Google Patents

Abstract

A network node and a method for a wireless communication system are provided. The network node includes a processor and a transceiver. The processor is configured to allocate a plurality of resources on a physical uplink shared channel (PUSCH) having a PUSCH format defined for the resources. The resources are associated with a user device and include at least one first physical resource block (PRB) for at least one uplink control information (UCI) and at least one second PRB for data. The at least one first PRB is located on an edge of the at least one second PRB. The transceiver is configured to signal allocation information to the user device. The allocation information includes a frequency location and a number of the resources.

Description

Network node and method for wireless communication system

The present invention relates to the field of communication systems, in particular to a network node, user device and method used in a wireless communication system.

In long term evolution (LTE), the physical channels of LTE can be classified into downlink channels and uplink channels. The downlink channel includes, for example, a physical downlink shared channel (PDSCH) and a physical downlink control channel (PDCCH). The uplink channel includes, for example, a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH).

LTE provides PUCCH for transmitting uplink control information (UCI). In order to maintain a low peak-to-average power ratio (PAPR) characteristic, it is not allowed to transmit PUCCH and PUSCH at the same time. Therefore, if the UCI is requested to be transmitted in a scheduled sub-frame of the PUSCH, the UCI is transmitted by multiplexing the UCI to the PUSCH, thereby increasing the complexity of multiplexing the UCI on the PUSCH.

The purpose of the present invention is to provide a network node, a user device, and a method for a wireless communication system, which can reduce the multiplexing operation of uplink control information (uplink control information) on a physical uplink shared channel (physical uplink shared channel, PUSCH). Information, UCI) complexity, and at the same time, it can maintain the consistent design and performance of UCI on the physical uplink control channel (PUCCH) and PUSCH.

The first aspect of the present invention provides a network node for a wireless communication system. The network node includes a processor and a transceiver. The processor is configured to allocate a plurality of resources on a physical uplink shared channel. The physical uplink shared channel has a physical uplink shared channel format that defines the resources. The resources are associated with a user device and include at least one first physical resource block for at least one uplink control information and at least one second physical resource block for a piece of data. At least one first physical resource block is located on an edge of at least one second physical resource block. The transceiver is configured to signal the user device to notify a distribution information. The allocation information includes the frequency location and quantity of these resources.

According to an embodiment combined with the first aspect of the present invention, the at least one first physical resource block includes two first physical resource blocks. Two first physical resource blocks are separated from each other and located on two edges of at least one second physical resource block.

According to an embodiment combined with the first aspect of the present invention, the at least one first physical resource block includes a plurality of first physical resource blocks. The at least one second physical resource block includes a plurality of second physical resource blocks. The first physical resource blocks are distributed among the second physical resource blocks.

According to an embodiment combined with the first aspect of the present invention, the at least one uplink control information includes a plurality of uplink control information, and the processor is configured to split for different uplinks by hopping within a time slot Control those resources of information.

According to an embodiment incorporating the first aspect of the present invention, the resources used for different uplink control information are located at the same frequency and in different consecutive time slots.

According to an embodiment combined with the first aspect of the present invention, the resources used for different uplink control information are separately located in a frequency domain and in the same time slot.

According to an embodiment combined with the first aspect of the present invention, the resources used for the same uplink control information are separately located in a frequency domain and in different consecutive time slots.

According to an embodiment incorporating the first aspect of the present invention, the at least one uplink control information includes a plurality of uplink control information, and the processor is configured to divide the resources for different uplink control information .

According to an embodiment incorporating the first aspect of the present invention, the resources used for at least one uplink control information include a positive acknowledgement/negative acknowledgement signal, and the processor is configured to transmit a positive acknowledgement at the beginning of a time slot. Confirm/negative confirmation signal.

According to an embodiment combined with the first aspect of the present invention, the resources used for at least one uplink control information include a positive/negative confirmation signal, and the processor is configured to be used for a physical uplink control channel A positive confirmation/negative confirmation signal is sent on.

According to an embodiment combined with the first aspect of the present invention, the processor is configured to use the same modulation method and the same modulation method for at least one uplink control information on the physical uplink shared channel and the physical uplink control channel. At least one of the same mapping methods.

According to an embodiment incorporating the first aspect of the present invention, the processor is configured to use the same waveform for the at least one uplink control information and the data on the physical uplink shared channel.

The second aspect of the present invention provides a user device used in a wireless communication system. The user device includes a processor and a transceiver. The processor is configured to determine an uplink control information for at least one network node. The transceiver is configured to transmit uplink control information in a physical uplink shared channel to at least one network node. A plurality of resources are allocated to the physical uplink shared channel. The physical uplink shared channel has a physical uplink shared channel format that defines the resources. The resources include at least one first physical resource block used for at least one uplink control information and at least one second physical resource block used for a piece of data. And at least one first physical resource block is located on an edge of at least one second physical resource block.

According to an embodiment incorporating the second aspect of the present invention, the transceiver is configured to receive a distribution information from at least one network node. The allocation information includes the frequency location and quantity of these resources. The transceiver is configured to transmit uplink control information in the physical uplink shared channel according to the allocation information.

According to an embodiment combined with the second aspect of the present invention, the at least one first physical resource block includes two first physical resource blocks. Two first physical resource blocks are separated from each other and located on two edges of at least one second physical resource block.

According to an embodiment combined with the second aspect of the present invention, the at least one uplink control information includes a plurality of uplink control information, and the processor is configured to split for different uplinks by hopping within a time slot Control those resources of information.

According to an embodiment combined with the second aspect of the present invention, the at least one uplink control information includes a plurality of uplink control information, and the processor is configured to divide the resources for different uplink control information . The resources used for at least one uplink control information include a positive acknowledgement/negative acknowledgement signal, and the processor is configured to transmit a positive acknowledgement/negative acknowledgement signal at the beginning of a time slot.

The third aspect of the present invention provides a method for a wireless communication system. The method includes allocating a plurality of resources on a physical uplink shared channel and signaling the user equipment to notify the allocation information. The physical uplink shared channel has a physical uplink shared channel format that defines the resources. These resources are associated with a user device. The resources include at least one first physical resource block used for at least one uplink control information and at least one second physical resource block used for a piece of data. At least one first physical resource block is located on an edge of at least one second physical resource block. The allocation information includes the frequency location and quantity of these resources.

According to an embodiment combined with the third aspect of the present invention, the at least one first physical resource block includes two first physical resource blocks. Two first physical resource blocks are separated from each other and located on two edges of at least one second physical resource block.

According to an embodiment combined with the third aspect of the present invention, the at least one uplink control information includes a plurality of uplink control information. The method further includes dividing the resources for different uplink control information by hopping within a time slot.

In the embodiment of the present invention, the at least one first physical resource block used for at least one uplink control information is located on the edge of the at least one second physical resource block used for data, which can reduce the sharing of the physical uplink channel The complexity of the uplink control information in the multiplexing operation, at the same time, can maintain the consistent design and performance of the uplink control information on the physical uplink control channel and the physical uplink shared channel.

100‧‧‧Network Node

102, 302‧‧‧ processor

104、304‧‧‧Transceiver

106, 306‧‧‧antenna

200‧‧‧Method

202, 204‧‧‧ block

300‧‧‧User Device

500‧‧‧Wireless Communication System

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative and labor.

Fig. 1 shows a block diagram of a network node used in a wireless communication system according to an embodiment of the present invention.

Fig. 2 shows a flowchart of a method for a wireless communication system according to an embodiment of the present invention.

Fig. 3 shows a block diagram of a user equipment used in a wireless communication system according to an embodiment of the present invention.

Figure 4 shows a schematic diagram of resources on a physical uplink shared channel according to an embodiment of the present invention.

Figure 5 shows a schematic diagram of resources on a physical uplink shared channel according to an embodiment of the present invention.

Fig. 6 shows a schematic diagram of resources on a physical uplink shared channel according to an embodiment of the present invention.

Fig. 7 shows a schematic diagram of resources on a physical uplink shared channel according to an embodiment of the present invention.

Fig. 8 shows a schematic diagram of resources on a physical uplink shared channel according to an embodiment of the present invention.

Fig. 9 shows a schematic diagram of resources on a physical uplink shared channel according to an embodiment of the present invention.

Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings, in combination with technical content, structural features, realized objectives and effects. Specifically, the terms in the embodiments of the present invention are only used to describe a certain embodiment, and do not constitute a limitation to the present invention.

1, the network node 100 communicates with a wireless communication system 500. The network node 100 includes a processor 102 and a transceiver 104. The processor 102 communicates with the transceiver 104. The network node 100 may include one or more optional antennas 106 coupled to the transceiver 104. The processor 102 is configured to allocate a plurality of resources on a physical uplink shared channel (PUSCH). PUSCH has a PUSCH format that defines these resources. The resources are associated with a user device 300 (refer to FIG. 3) of the wireless communication system 500 and include at least one first physical resource block (physical resource block) for at least one uplink control information (uplink control information, UCI) ,PRB) and at least one second PRB for a data.

At least one first PRB is located on an edge of at least one second PRB. This means that the allocated at least one first PRB is intended to be used by the user equipment 300 to transmit UCI. It should be noted, however, that if code division multiplexing (CDM) or other orthogonal multiplexing (orthogonal multiplexing) methods are used, the same first PRB may be allocated to more than one user equipment 300. The transceiver 104 is configured to signal the user device 300 to notify the distribution information. The allocation information includes the frequency location and quantity of the resources used for PUSCH.

A network node 100 or a base station, for example, a radio base station (RBS) may be called, for example, an eNB, eNodeB, NodeB, or Node B transmitter in some networks according to the communication technology and terminology used. Radio network nodes can be of different types based on the transmit power and cell size, for example, macro eNodeB, home eNodeB, or pico eNodeB. The radio network node may be a station (STA). The station can be any device that interfaces with a wireless medium (WM) and includes an IEEE 802.11 compatible media access control (MAC) and a physical layer (PHY).

1 and 2, the method 200 may be executed in the network node 100. The method 200 includes allocating a plurality of resources on the PUSCH as shown in block 202 and signaling the user device 300 to notify the allocation information as shown in block 204. The PUSCH has a PUSCH format that defines these resources. The resources are associated with the user equipment 300 and include at least one first PRB for at least one UCI and at least one second PRB for data. At least one PRB is located on an edge of at least one second PRB. The allocation information includes the frequency location and quantity of these resources.

3, the user device 300 includes a processor 302 and a transceiver 304. The processor 302 communicates with the transceiver 304. In this embodiment, the user equipment 300 may further include one or more optional antennas 306 coupled to the transceiver 304. The processor 302 of the user device 300 is configured to determine the UCI for at least one network node 100.

UCI involves information about the transmission between the user device 300 and the network node 100, such as scheduling request (SR) transmission, hybrid automatic repeat request (HARQ) feedback, and periodic channel status Information (channel state information, CSI) report.

The transceiver 304 of the user device 300 receives UCI from the processor 302 and is also configured to transmit the UCI in the PUSCH to the network node 100. Plural resources are allocated to PUSCH. The PUSCH has a PUSCH format that defines these resources. The resources include at least one first PRB for UCI and at least one second PRB for data. At least one first PRB is located on an edge of at least one second PRB. The transceiver 304 is configured to receive distribution information from at least one network node 100. The allocation information includes the frequency location and quantity of these resources. The transceiver 304 is configured to transmit UCI in the PUSCH according to the allocation information.

The user device 300, for example, may be a mobile station, a wireless terminal, and/or a mobile terminal, and is used to communicate with the wireless communication system 500, which is sometimes referred to as a cellular radio system. The user device 300 may be further referred to as a mobile phone with wireless capability, a cellular phone, a tablet computer, or a laptop computer. The user device 300, for example, can be a portable, pocketable, handheld, mobile device including a computer or a car, and can communicate with another entity such as another receiver or server via a radio access network. And/or data communication. The user device 300 may be a station (STA). The station can be any device that interfaces with a wireless medium (WM) and includes an IEEE 802.11 compatible media access control (MAC) and a physical layer (PHY).

In long term evolution (LTE), UCI includes positive-acknowledgement (ACK)/negative-acknowledgement (NACK) signals, CSI, and rank indicator (RI). When there is scheduled data in the same sub-frame, UCI can be piggybacked to PUSCH. In other cases, when there is aperiodic CSI feedback, due to the large payload, even if there is no data transmission, the aperiodic CSI feedback will be transmitted to PUSCH. Since UCI requires a lower coding rate compared to data, an offset is applied to obtain multiple resource elements (RE). These resource elements are used to carry UCI. Different types of UCI can be placed in different locations according to their importance. Generally, ACK/NACK and RI are more important than CSI (which can include precoding matrix index (PMI)) and channel quality indicator (CQI). Therefore, ACK/NACK and RI are placed in the reference Signal (reference signal, RS) symbols around to benefit from more accurate channel estimation. The data is punctured by UCI to avoid changes in rate matching caused by inserting UCI. Generally speaking, UCI on PUSCH requires considerable extra effort to ensure that UCI is transmitted and received correctly. Even with such extraordinary efforts, the impact on UCI and data cannot be ignored. On the one hand, the UCI performance on the PUSCH may be different from the UCI performance on the physical uplink control channel (PUCCH). On the other hand, due to the puncturing of UCI, data transmission may be affected.

In order to reduce the above-mentioned influence in terms of specifications and system performance, some design principles used in LTE can be modified. In an embodiment, UCI and data transmission are separated. For example, UCI is transmitted in separate PRBs instead of data. Even in the same UCI, the overall resource allocation of PUSCH can be simultaneously signaled. One way is to use PRBs for UCI on both edges of the allocated frequency resources.

4, in an embodiment, the first PRB located on both sides of the allocated resources can be used for UCI, and the second PRB can be used for data. The at least one first PRB includes two first PRBs, and the two first PRBs are separated from each other and located on two edges of the at least one second PRB.

5, in another embodiment, according to the payload of UCI, some distributed first PRBs may be allocated and interleaved with second PRBs for data. The at least one first PRB includes a plurality of first PRBs. The at least one second PRB includes a plurality of second PRBs. The first PRB is distributed in the second PRB.

In order to further increase the frequency diversity of the UCI part, intra-slot hopping can also be supported. Referring to FIG. 6, as an embodiment, UCI, UCI number 1 (UCI#1) and UCI number 2 (UCI#2) may include different types of UC. Two parts of UCI, two parts of UCI number 1, and two parts of UCI number 2 are transmitted to each side of the PUSCH frequency resource allocation, and in the middle of the time slot, the two parts of UCI jump to PUSCH The other side of the frequency resource allocation to obtain frequency diversity gain.

1 and FIGS. 6 to 8, in one embodiment, at least one UCI includes a plurality of UCIs, and the processor 102 is configured to divide the resources for different UCIs by hopping in the time slot. The resources for different UCIs are located at the same frequency and in different consecutive time slots. The resources for different UCIs are located separately in a frequency domain and in the same time slot. The resources used for the same UCI are located separately in a frequency domain and in different consecutive time slots.

In another embodiment, the processor 102 is configured to partition the resources for different UCIs. The resources for at least one UCI include an ACK/NACK signal, and the processor 102 is configured to transmit the ACK/NACK signal at the beginning of a time slot. The resources used for at least one UCI include ACK/NACK signals, and the processor 102 is configured to transmit the ACK/NACK signals on the PUCCH.

In UCI, because ACK/NACK and RI information are more important and require more protection, ACK/NACK and RI information can be transmitted separately from other UCIs. Also for low-delay applications, it is desirable to decode ACK/NACK first. Therefore, it may be good to place ACK/NACK and RI information around the beginning of the time slot so that ACK/NACK and RI information can be decoded first. An example of such a division is illustrated in FIG. 7 where ACK/NACK is transmitted around the beginning of the time slot, and then other UCI such as PMI/CQI is transmitted. It should be understood that the example illustrated in FIG. 7 indicates that ACK/NACK may not require too many symbols. In the case that the user equipment is located on the edge of the cell and needs more symbols to carry ACK/NACK, all symbols can be used for ACK/NACK. For example, referring to FIG. 6, the resource allocated to UCI number 1 can be used to carry ACK/NACK, and the resource allocated to UCI number 2 can be used for other UCI.

It is also possible to transmit ACK/NACK and some other UCI on the PUCCH, for example, transmit ACK/NACK and some other UCI on the PUCCH with a long duration and/or on the PUCCH with a short duration. For PUCCH with long duration, due to peak-to-average power ratio (PAPR) considerations, discrete fourier transform-spread-orthogonal frequency division multiplexing (DFT) is used. -S-OFDM) as the waveform (waveform, WF). Some orthogonal sequences, such as the Zadoff-Chu family, can be used to modulate/spread UCI and map UCI along the frequency of each symbol. For UCI on PUSCH, although other encoding/modulation methods can be used for UCI, such as ACK/NACK, it may be better to modulate and map UCI on symbols in PUSCH in a similar manner to that used on PUCCH, so that Performance is more consistent and resource allocation is more predictable. For example, ACK/NACK can still be modulated/spread by some orthogonal sequences and mapped along the frequency on each symbol. Referring to FIG. 8, after spreading using different orthogonal sequences on each symbol, multiple UCIs (ACK/NACK) can be multiplexed.

1 and 9, the processor 102 is configured to use at least one of the same modulation method and the same mapping method for at least one UCI on the PUSCH and PUCCH. The processor 102 is configured to use the same waveform for at least one UCI and the data on the PUSCH.

Another aspect that needs to be considered is the waveform of the UCI part on PUSCH. It has been agreed to support two types of waveforms in the uplink of the 5th generation mobile communication new radio (5G NR) of the fifth generation mobile communication system, namely, the extended orthogonal frequency division multiplexing (digital theater system). systems-spread-orthogonal frequency division multiplexing, DTS-S-OFDM) and cyclic prefix orthogonal frequency division multiplexing (CP-OFDM). Each waveform has its own advantages and disadvantages. Generally speaking, DFT-S-OFDM has lower PAPR, so it can increase coverage, while CP-OFDM has good spectrum efficiency and is easier to implement multi-input multi-output (MIMO). However, CP-OFDM has a larger PAPR and therefore may have a smaller coverage area. Since the data part of PUSCH can use waveforms in different scenarios, the same waveform can be used more directly for the UCI part. This will ensure similar performance/coverage between data and control, while also making UCI easier for the overall design of PUSCH such as RS and MIMO schemes. Figure 9 is an example of using CP-OFDM waveforms for both the UCI part and the data part of the PUSCH. Therefore, some distributed RSs can be multiplexed with the UCI part or the data part. The same waveform can allow the design of RSs to be together, and provide a more consistent and unified RS mode to obtain good performance and reasonable overhead.

In the embodiment of the present invention, at least one first PRB for at least one UCI is located on the edge of at least one second PRB for data, which can reduce the complexity of multiplexing UCI on PUSCH, and at the same time, The PUCCH and PUSCH maintain the consistent design and performance of UCI.

Those of ordinary skill in the art should understand that each unit, algorithm, and step described and disclosed in the embodiments of the present invention can be implemented by electronic hardware or a combination of computer software and electronic hardware. The function implemented by hardware or software depends on the application conditions and design requirements of the technical solution. A person of ordinary skill in the art can implement functions in different ways for each specific application, and these implementations should not be considered beyond the scope of the present invention.

Those of ordinary skill in the art can understand that because the working processes of the systems, devices, and units are substantially the same, they can refer to the working processes of the systems, devices, and units in the foregoing embodiments. For ease of description and brevity, these working processes will not be detailed.

It can be understood that the system, device, and method disclosed in the embodiments of the present invention may be implemented in other ways. The above-mentioned embodiment is only exemplary. The division of the above-mentioned units is only based on the division of logic functions, and other division methods may be used for implementation. Multiple units or elements may be combined or integrated into another system. Some features may also be ignored or skipped. On the other hand, the displayed or discussed mutual coupling, direct coupling, or communication coupling may be operated through some interfaces, devices or units, and may be indirect or communication operations in electrical, mechanical or other forms.

The units as separate parts for explanation may or may not be physically separate. The display unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed on multiple network units. Some or all of the units may be used according to the purpose of the embodiment.

In addition, each functional unit in each embodiment may be integrated in a processing unit, and each unit may exist separately, or may also be integrated in a processing unit with two or more units.

If the software functional unit is realized and used and sold as a product, the software functional unit can be stored in a computer readable storage medium. Based on this understanding, the technical solutions proposed by the embodiments of the present invention may be substantially or partially embodied in the form of software products. Alternatively, a part of the technical solution that contributes to traditional technology can be implemented as a software product. The software product in the computer is stored in a storage medium and includes multiple commands for a computer device (such as a personal computer, a server or a network device) to execute all or part of the steps disclosed in this embodiment. Storage media include portable floppy disk (universal serial bus disk, USB disk), mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), floppy disk or capable Other types of media for storing code.

Although the present invention has been described in conjunction with what is considered to be the most practical and preferred embodiment, it should be understood that the present invention is not limited to the disclosed embodiments, but is intended to cover the most practical and preferred embodiments of the present invention. Various configurations in the case of a wide range of explanations.

100‧‧‧Network Node

102‧‧‧Processor

104‧‧‧Transceiver

106‧‧‧antenna

500‧‧‧Wireless Communication System

Claims (8)

A network node used in a wireless communication system includes: a processor configured to allocate a plurality of resources on a physical uplink shared channel, the physical uplink shared channel has an entity defining the resources In an uplink shared channel format, the resources are associated with a user device, and the resources include at least one first entity resource block for at least one uplink control information and at least one second entity for a data Resource block, the at least one first physical resource block is located on an edge of the at least one second physical resource block, wherein the at least one first physical resource block includes two first physical resource blocks, and the two first entities The resource blocks are separated from each other and located on two edges of the at least one second physical resource block, or the at least one first physical resource block includes a plurality of first physical resource blocks, and the at least one second physical resource block includes a plurality of first physical resource blocks. Two physical resource blocks, the first physical resource blocks are distributed among the second physical resource blocks; and a transceiver configured to signal the user device to notify an allocation information, wherein the allocation information includes The frequency location and quantity of these resources. According to the network node of claim 1, wherein the at least one uplink control information includes a plurality of uplink control information, and the processor is configured to split for different uplinks by hopping within a time slot These resources of link control information. According to the network node of item 2 of the scope of patent application, the resources used for different uplink control information are located at the same frequency and in different consecutive time slots, or used for different uplink control information These resources are separately located in a frequency domain and in the same time slot. According to the second network node of the scope of patent application, the resources used for the same uplink control information are separately located in a frequency domain and in different consecutive time slots. According to the network node of claim 2, wherein the resources used for the at least one uplink control information include a positive confirmation/negative confirmation signal, and the processor is configured to be used at the beginning of a time slot The positive confirmation/negative confirmation signal is transmitted, or the processor is configured to transmit the positive confirmation/negative confirmation signal on a physical uplink control channel. The network node according to any one of items 1 to 5 in the scope of the patent application, wherein the processor is configured to perform processing on the at least one of the physical uplink shared channel and the physical uplink control channel The uplink control information uses at least one of the same modulation method and the same mapping method. The network node according to any one of items 1 to 5 of the scope of patent application, wherein the processor is configured to control the at least one uplink control information and the data on the physical uplink shared channel Use the same waveform. A method for a wireless communication system includes: allocating a plurality of resources on a physical uplink shared channel, the physical uplink shared channel having a physical uplink shared channel format defining the resources, and the resources Associated with a user device, and the resources include at least one first physical resource block used for at least one uplink control information and at least one second physical resource block used for a data, the at least one first physical resource The block is located on an edge of the at least one second physical resource block, wherein the at least one first physical resource block includes two first physical resource blocks, and the two first physical resource blocks are separated from each other and located on the at least one second physical resource block. On two edges of the two physical resource blocks, or the at least one first physical resource block includes a plurality of first physical resource blocks, the at least one second physical resource block includes a plurality of second physical resource blocks, and the first entities The resource blocks are distributed among the second physical resource blocks; and A signal is sent to the user device to notify allocation information, where the allocation information includes the frequency location and quantity of the resources.

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