CN116545554A - Transient interference signal marking method based on broadband spectrum monitoring - Google Patents

Abstract

The invention discloses a transient interference signal marking method based on broadband spectrum monitoring, which relates to the field of radio station communication efficiency evaluation and comprises the following steps: s1: manually setting a background noise identification threshold and a radio station interference allowance threshold, and determining an interference signal identification threshold; s2: judging the occurrence time of the transient interference signal; s3: judging the bandwidth of the transient interference signal; s4: judging the amplitude of the transient interference signal; s5: the transient interference signal characteristic marks. The method for marking the transient interference signal based on broadband spectrum monitoring can quickly identify the characteristics of the transient interference signal, realize quick marking of the transient interference signal, find out that marking is realized, has low requirement on analysis data, can realize the characteristic marking of the interference signal by utilizing broadband spectrum monitoring data, does not need signal characteristic data, has low operation complexity and provides support for the communication efficiency influence analysis of a radio station.

Description

User equipment, electronic device, wireless communication method, and storage medium

Technical Field

Embodiments of the present disclosure relate generally to the field of wireless communications, and in particular, to user equipment, electronic devices, wireless communication methods, and computer-readable storage media. More particularly, the present disclosure relates to a user equipment in a wireless communication system, an electronic device as a network-side device in a wireless communication system, a wireless communication method performed by a user equipment in a wireless communication system, a wireless communication method performed by a network-side device in a wireless communication system, and a computer-readable storage medium.

Background

In a D-MIMO (Distributed Multi-Input Multi-Output) communication system, multiple antennas of a base station are distributed over several RRHs (Remote Radio Head, remote radio heads) with different geographical locations, each RRH may be equipped with one or more antennas. The cell antennas in the D-MIMO system are more uniformly distributed inside the cell compared to the conventional centralized multi-antenna deployment scheme, so that the average distance from the UE (User Equipment) to the nearest cell antenna is significantly shortened. For UEs located at the cell edge, the D-MIMO system may significantly improve channel quality, thus providing better cell coverage. Further, as the average distance of the UE to the nearest cell antenna is shortened, the average transmit power required to serve the UE is also reduced, which also results in improved energy efficiency of the cell.

However, in a D-MIMO communication system, there is typically a significant difference in distance between different RRHs and UEs. On the other hand, in uplink transmission, a part of RRHs are adjacent to the cell edge and can be interfered by strong uplink cells. There may be a significant difference in channel quality between different RRHs and UEs.

Therefore, it is necessary to propose a technical solution to enable a suitable RRH to be selected according to the channel quality to provide services for the UE, so as to improve the communication quality and energy efficiency of the system.

Disclosure of Invention

This section provides a general summary of the disclosure, and is not a comprehensive disclosure of its full scope or all of its features.

An object of the present disclosure is to provide a user equipment, an electronic device, a wireless communication method, and a computer-readable storage medium to enable selection of an appropriate RRH according to channel quality to provide a service for a UE, thereby improving communication quality and energy efficiency of a system.

According to an aspect of the present disclosure, there is provided a user equipment comprising processing circuitry configured to: measuring a channel quality of a downlink between each RRH of a plurality of RRHs and the user equipment; and selecting one or more RRHs from the plurality of RRHs according to the measurement result, so that the selected RRHs provide services for the user equipment.

According to another aspect of the present disclosure, there is provided an electronic device comprising processing circuitry configured to: measuring channel quality of an uplink between each of the plurality of RRHs and the user equipment; and selecting one or more RRHs from the plurality of RRHs according to the measurement result, so that the selected RRHs provide services for the user equipment.

According to another aspect of the present disclosure, there is provided a wireless communication method performed by a user equipment, comprising: measuring a channel quality of a downlink between each RRH of a plurality of RRHs and the user equipment; and selecting one or more RRHs from the plurality of RRHs according to the measurement result, so that the selected RRHs provide services for the user equipment.

According to another aspect of the present disclosure, there is provided a wireless communication method performed by an electronic device, including: measuring channel quality of an uplink between each of the plurality of RRHs and the user equipment; and selecting one or more RRHs from the plurality of RRHs according to the measurement result, so that the selected RRHs provide services for the user equipment.

According to another aspect of the present disclosure, there is provided a computer-readable storage medium comprising executable computer instructions which, when executed by a computer, cause the computer to perform a wireless communication method according to the present disclosure.

According to another aspect of the present disclosure, there is provided a computer program which, when executed by a computer, causes the computer to perform the wireless communication method according to the present disclosure.

Using the user equipment, the electronic equipment, the wireless communication method and the computer readable storage medium according to the present disclosure, in downlink transmission, the user equipment can select an RRH according to channel quality to provide services for the user equipment, and in uplink transmission, the electronic equipment as a network side device can select the RRH according to channel quality to provide services for the user equipment. In this way, a proper RRH can be selected to provide service for the UE according to the channel quality, so that the communication quality and the energy efficiency of the system are improved.

Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.

Drawings

The drawings described herein are for illustration purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure. In the drawings:

fig. 1 is a schematic diagram showing a scenario of a wireless communication system to which D-MIMO technology is applied;

fig. 2 is a schematic diagram showing an uplink communication scenario of a wireless communication system to which D-MIMO technology is applied;

fig. 3 is a block diagram showing an example of a configuration of a user equipment according to an embodiment of the present disclosure;

Fig. 4 is a schematic diagram illustrating a scenario of a wireless communication system to which SU (Single-User) D-MIMO technology is applied according to an embodiment of the present disclosure;

fig. 5 is a schematic diagram illustrating a scenario of a wireless communication system applying MU (Multi-User) D-MIMO technology according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram showing the content of information of a selected RRH according to an embodiment of the present disclosure;

fig. 7 is a schematic diagram showing the content of information of a selected RRH according to another embodiment of the present disclosure;

fig. 8 is a schematic diagram showing the content of information of a selected RRH according to still another embodiment of the present disclosure;

fig. 9 is a schematic diagram showing the content of information of a selected RRH according to still another embodiment of the present disclosure;

fig. 10 is a signaling flow diagram illustrating a process of selecting an RRH in a scenario of downlink communication, according to an embodiment of the disclosure;

fig. 11 is a block diagram showing an example of a configuration of an electronic device as a network-side device according to an embodiment of the present disclosure;

fig. 12 is a signaling flow diagram illustrating a process of selecting an RRH in a scenario of uplink communication according to an embodiment of the present disclosure;

fig. 13 is a flowchart illustrating a wireless communication method performed by a user equipment according to an embodiment of the present disclosure;

Fig. 14 is a flowchart illustrating a wireless communication method performed by an electronic device as a network-side device according to an embodiment of the present disclosure;

fig. 15 is a block diagram showing a first example of the schematic configuration of the gNB;

fig. 16 is a block diagram showing a second example of the schematic configuration of the gNB;

fig. 17 is a block diagram showing an example of a schematic configuration of a smart phone; and

fig. 18 is a block diagram showing an example of a schematic configuration of the car navigation device.

While the disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the description herein of specific embodiments is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure. It is noted that corresponding reference numerals indicate corresponding parts throughout the several views of the drawings.

Detailed Description

Examples of the present disclosure will now be described more fully with reference to the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses.

Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that the exemplary embodiments may be embodied in many different forms without the use of specific details, neither of which should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known structures, and well-known techniques have not been described in detail.

The description will be made in the following order:

1. a description of a scene;

2. configuration examples of user equipment;

3. configuration examples of network side devices;

4. method embodiments;

5. application examples.

<1. Description of scene >

Fig. 1 is a schematic diagram showing a scenario of a wireless communication system to which D-MIMO technology is applied. As shown in fig. 1, in the D-MIMO communication system, the base station includes a BBU (BaseBand Unit) and four RRHs with different geographic locations: RRH1, RRH2, RRH3 and RRH4. The multiple antennas of the base station are distributed over four RRHs. Each RRH is connected with the BBU through a forward link, so that the BBU can perform a centralized process on the transmit and receive signals of each RRH. The UE within the cell is different from each RRH in distance, and thus there is a certain difference in channel quality from each RRH.

Fig. 2 is a schematic diagram showing an uplink communication scenario of a wireless communication system to which D-MIMO technology is applied. As shown in fig. 2, the base station in the serving cell receives an uplink signal from the UE through the RRH 3. Since RRH3 is located at the edge of the serving cell, an uplink signal from a UE of a neighboring cell, which belongs to an interference signal for RRH3, may be received. That is, in the scenario shown in fig. 2, uplink inter-cell interference occurs. In this case, the UE is not necessarily the best channel quality with RRH3, although it is closely spaced from RRH 3.

The present disclosure proposes a user equipment, an electronic device, a wireless communication method performed by the electronic device in a wireless communication system, and a computer-readable storage medium for such a scenario to select an appropriate RRH to serve a UE according to channel quality, thereby improving communication quality and energy efficiency of the system.

The wireless communication system according to the present disclosure may be a 5G NR (New Radio) communication system, or may be a future higher-level communication system. Further, the wireless communication system may apply D-MIMO technology. The wireless communication system may include a base station device and one or more UEs. The base station apparatus may include a BBU and one or more RRHs.

Furthermore, the present disclosure is applicable to SU D-MIMO scenarios, i.e. where only one UE is served on a specific time-frequency resource, as well as MU D-MIMO scenarios, i.e. where multiple UEs are served on a specific time-frequency resource. Further, the multiple RRHs of the present disclosure may serve the UE in a coherent transmission manner, that is, after BBU processing, each RRH may jointly transmit one data layer of the UE, and the multiple RRHs of the present disclosure may also serve the UE in an incoherent transmission manner, that is, different RRHs respectively transmit different data layers to the UE, where only one data layer is transmitted by one RRH. Specifically, in SU D-MIMO scenarios, multiple RRHs may serve the UE in a coherent transmission manner, or may serve the UE in an incoherent transmission manner; in a MU D-MIMO scenario, multiple RRHs may serve the UE in a coherent transmission.

The network side device according to the present disclosure may be any type of base station device, for example, may be an eNB or a gNB (base station in a 5 th generation communication system). The base station apparatus may include a BBU and one or more RRHs. In this context, since the BBU is responsible for information processing, the UE transmitting information to the base station apparatus means that the UE transmits information to the base station apparatus through the RRH so that the BBU of the base station apparatus processes the information. Similarly, the base station apparatus transmitting information to the UE means that the base station apparatus transmits information processed by the BBU to the UE through the RRH.

The user equipment according to the present disclosure may be a mobile terminal such as a smart phone, a tablet Personal Computer (PC), a notebook PC, a portable game terminal, a portable/dongle type mobile router, and a digital camera device, or a vehicle-mounted terminal such as a car navigation device. User equipment may also be implemented as terminals performing machine-to-machine (M2M) communication (also referred to as Machine Type Communication (MTC) terminals). Further, the user equipment may be a wireless communication module (such as an integrated circuit module including a single die) mounted on each of the above terminals.

<2 > configuration example of user Equipment

Fig. 3 is a block diagram illustrating an example of a configuration of a user equipment 300 according to an embodiment of the present disclosure.

As shown in fig. 3, the user equipment 300 may include a measurement unit 310 and a selection unit 320.

Here, each unit of the user equipment 300 may be included in the processing circuit. It should be noted that the ue 300 may include one processing circuit or a plurality of processing circuits. Further, the processing circuitry may include various discrete functional units to perform various different functions and/or operations. It should be noted that these functional units may be physical entities or logical entities, and that units that are referred to differently may be implemented by the same physical entity.

According to an embodiment of the present disclosure, the measurement unit 310 may measure a channel quality of a downlink between each of the plurality of RRHs and the user equipment 300.

According to an embodiment of the present disclosure, the selection unit 320 may select one or more RRHs from the plurality of RRHs according to the measurement result of the measurement unit 310 to provide the service to the user equipment 300 by the selected RRHs.

As can be seen, according to the user equipment 300 of the embodiment of the present disclosure, the RRH can be selected according to the channel quality to provide services for the user equipment 300, thereby improving the communication quality and energy efficiency of the system.

According to an embodiment of the present disclosure, as shown in fig. 3, the user equipment 300 may further include a communication unit 340 for receiving information from other devices than the user equipment 300 and/or transmitting information to other devices than the user equipment 300.

According to an embodiment of the present disclosure, the user equipment 300 may receive a downlink Reference Signal such as CSI-RS (Channel State Information-Reference Signal) from the network side device through the communication unit 340, so that the measurement unit 310 may measure the channel quality of the downlink between each RRH and the user equipment 300 based on the downlink Reference Signal.

According to an embodiment of the present disclosure, each RRH may include a plurality of antenna ports belonging to the present cell, and the network side device may group all antenna ports of the downlink reference signal, so that one antenna port group includes all antenna ports of one RRH. That is, the antenna port group has a correspondence relationship with the RRH. In this way, the user equipment 300 may distinguish reference signals from different RRHs through the antenna port group. That is, the measurement unit 310 may determine the channel quality of the RRH corresponding to the antenna port group by measuring the downlink reference signals from different antenna port groups.

According to embodiments of the present disclosure, channel quality may be represented by various parameters, including, but not limited to: RSRP (Reference Signal Receiving Power, reference signal received power), RSRQ (Reference Signal Receiving Quality, reference signal received quality), SIR (Signal to Interference Ratio, signal-to-interference ratio), SINR (Signal to Interference plus Noise Ratio, signal-to-interference-and-noise ratio), SNR (Signal Noise Ratio, signal-to-noise ratio), PL (Path Loss), and the like.

As described above, the measurement unit 310 may measure the channel quality of the downlink between each of all RRHs within the cell in which the user equipment 300 is located and the user equipment 300. After that, the selection unit 320 may select K RRHs according to the measurement result, where K is a positive integer. The selection unit 320 will be described in detail below.

Fig. 4 is a schematic diagram illustrating a scenario of a wireless communication system to which SU D-MIMO technology is applied according to an embodiment of the present disclosure. As shown in fig. 4, only the user equipment 300 is served on a specific time-frequency resource. In the SU D-MIMO scenario, multiple RRHs may perform coherent transmission or non-coherent transmission.

According to an embodiment of the present disclosure, the selection unit 320 may select the first K RRHs with the best channel quality, where the value of K may be determined according to requirements or experience.

According to an embodiment of the present disclosure, the selection unit 320 may determine channel quality between different RRH combinations of the plurality of RRHs and the user equipment 300. Specifically, after the measurement unit 310 measures the channel quality between each RRH and the user equipment 300, the selection unit 320 may determine the channel quality between each combination of RRHs and the user equipment 300, so as to select the RRH combination with the best channel quality to determine the value of K and K RRHs. For example, in case of N RRHs in the cell, the selection unit 320 may calculate 2 ^N Channel quality between the combination of each of the 1 RRH combinations and the user equipment 300.

For example, in the case of n=3, assuming that 3 RRHs are RRH1, RRH2, and RRH3, respectively, there are combinations of 7 RRHs as follows: RRH1; RRH2; RRH3; rrh1+rrh2; rrh1+rrh3; rrh2+rrh3; rrhh1+rrhh2+rrh3. The selection unit 320 may determine channel quality between the combination of 7 RRHs and the user equipment 300, respectively, where channel modeling may be performed according to any method known in the art, such that channel quality between the combination of RRHs and the user equipment 300 is determined according to channel quality between the respective RRHs and the user equipment 300, which is not limited by the present disclosure. Assuming that the selection unit 320 determines that the channel quality between the combined rrh2+rrh3 and the user equipment 300 is the best (e.g., SNR is the largest), the selection unit 320 may determine k=2 and determine RRH2 and RRH3 as the selected RRH.

As described above, the selection unit 320 may select a combination of RRHs having the best channel quality, thereby maximizing the performance of the system.

According to an embodiment of the present disclosure, the selecting unit 320 may further select the first K RRHs with the best channel quality, K, to be the minimum value that meets the data layer number requirement of the user equipment 300.

For example, the selecting unit 320 may first select the first 1 RRH with the best channel quality, and determine whether the rank of the channel matrix from the antenna on the RRH to the user equipment 300 meets the data layer number requirement of the user equipment 300. If the rank of the channel matrix from the antenna on the RRH to the user equipment 300 meets the data layer number requirement of the user equipment 300, k=1 is determined, and the RRH is the RRH finally selected by the selection unit 320. If the rank of the channel matrix from the antenna on the RRH to the user equipment 300 does not meet the data layer number requirement of the user equipment 300, the first 2 RRHs with the best channel quality are selected, and whether the ranks of the channel matrices from the antenna on the two RRHs to the user equipment 300 meet the data layer number requirement of the user equipment 300 is determined. If the rank of the channel matrix from the antennas on the two RRHs to the user equipment 300 meets the data layer number requirement of the user equipment 300, k=2 is determined, and the two RRHs are the RRHs finally selected by the selection unit 320. If the rank of the channel matrix from the antennas on the two RRHs to the user equipment 300 does not meet the data layer number requirement of the user equipment 300, the first 3 RRHs with the best channel quality are selected, and so on.

It should be noted that, in the present disclosure, if the rank of the channel matrix from the antenna to the user equipment 300 is greater than or equal to the number of data layers of the user equipment 300, the rank of the channel matrix from the antenna to the user equipment 300 is considered to be able to meet the data layer requirements of the user equipment 300; if the rank of the channel matrix of the antenna to the user equipment 300 is less than the number of data layers of the user equipment 300, the rank of the channel matrix of the antenna to the user equipment 300 is considered to be unable to meet the number of data layers requirements of the user equipment 300.

As described above, the selection unit 320 may determine a K value as small as possible that can meet the data layer number requirement of the user equipment 300, and thus may concentrate the transmission power on a few RRHs with good channel quality, thereby improving the reliability and energy efficiency of communication.

Several options of the selection unit 320 in SU D-MIMO scenarios are described above in a non-limiting manner. As described above, according to an embodiment of the present disclosure, the selection unit 320 may not only select RRHs, but also determine the number of RRHs selected, i.e., the value of K.

Fig. 5 is a schematic diagram illustrating a scenario of a wireless communication system applying MU D-MIMO technology according to an embodiment of the present disclosure; as shown in fig. 5, UE1 and UE2 are served on specific time-frequency resources. In an MUD-MIMO scenario, multiple RRHs may perform coherent transmission.

According to an embodiment of the present disclosure, the selection unit 320 may determine one or more RRHs having poor channel quality from among the plurality of RRHs, and determine RRHs other than the one or more RRHs having poor channel quality from among the plurality of RRHs as the selected RRH.

According to an embodiment of the present disclosure, in case that a difference between a channel quality of a certain RRH and a channel quality of an RRH having a best channel quality is greater than a predetermined threshold, the selecting unit 320 may determine that the channel quality of the RRH is poor, thereby removing the RRH from all the RRHs. For example, assuming that the channel quality is expressed in terms of path loss and the predetermined threshold is 20dB, assuming that the RRH with the best channel quality among RRH1, RRH2, RRH3, and RRH4 is RRH1 and the path loss of RRH3 and RRH4 is higher than the path loss of RRH1 by more than 20dB, the selection unit 320 considers that the channel quality of RRH3 and RRH4 is poor, and thus RRH1 and RRH2 can be selected as the finally selected RRH.

As shown in fig. 5, for UE1, the distances from RRH1, RRH2, RRH3, and RRH4 are not large, so that the channel quality of RRH1, RRH2, RRH3, and RRH4 are not large, and thus there is no RRH with poor channel quality, and the selection unit 320 may take RRH1, RRH2, RRH3, and RRH4 as the selected RRH. For UE2, which is closer to RRH3 and RRH4, is farther from RRH1 and RRH2, so that the channel quality of RRH1 and RRH2 may be worse, then the selection unit 320 may take RRH3 and RRH4 as the selected RRH.

In MU D-MIMO scenarios, the feedback information is mainly supported by the unequal gain precoding codebook, so using all RRHs for downlink transmission may be able to achieve good communication reliability, but this will result in a large feedback overhead for the user equipment 300. As described above, according to the embodiment of the present disclosure, the selection unit 320 may remove some RRHs having poor channel quality, and thus may reduce the overhead of feedback while guaranteeing the system communication quality.

The manner in which the selection unit 320 is selected in a MU D-MIMO scenario is described above in a non-limiting manner. According to an embodiment of the present disclosure, the selection unit 320 may not only select RRHs, but also determine the number of RRHs selected, i.e., the value of K.

According to an embodiment of the present disclosure, as shown in fig. 3, the user equipment 300 may further include a generating unit 330 for generating information of the selected RRH after the RRH is selected by the selecting unit 320. Further, the user equipment 300 may send information of the selected RRH to the network side device through the communication unit 340, for example, to the BBU of the base station device through the RRH.

According to an embodiment of the present disclosure, the generating unit 330 may generate a bit map and include the bit map in the information of the selected RRH. In the bit map, the value of the bit corresponding to the selected RRH is 1, and the value of the bit corresponding to the unselected RRH is 0. That is, the number of bits of the bit map is the same as the number of RRHs in the cell, and the bits have a one-to-one correspondence with the RRHs.

Fig. 6 is a schematic diagram illustrating the contents of information of a selected RRH according to an embodiment of the present disclosure. As shown in fig. 6, assuming that the number of RRHs in a cell is 4, the bit map includes 4 bits, and the 4 bits correspond to RRH1, RRH2, RRH3, and RRH4 in the cell, respectively. As shown in fig. 6, the bit corresponding to RRH1 is 1, which indicates that RRH1 is selected by the selecting unit 320, and the bits corresponding to RRH2, RRH3, and RRH4 are all 0, which indicates that RRH2, RRH3, and RRH4 are not selected by the selecting unit 320.

According to an embodiment of the present disclosure, as shown in fig. 3, the user equipment 300 may further include a quality determining unit 350 for determining RI (Rank Indicator) and/or PMI (Precoding Matrix Index ) to be fed back according to a channel corresponding to the selected RRH.

According to an embodiment of the present disclosure, in case that only one RRH is selected by the selection unit 320, the quality determination unit 350 may determine RI and/or PMI according to a channel corresponding to the RRH. In the case where the selection unit 320 selects a plurality of RRHs and the respective RRHs perform coherent transmission, the quality determination unit 350 may determine RI and/or PMI, i.e., determine one RI and/or PMI, from channels corresponding to the selected plurality of RRHs. In the case where the selection unit 320 selects a plurality of RRHs and the respective RRHs perform incoherent transmission, the quality determination unit 350 may determine RI and/or PMI from channels corresponding to each of the selected RRHs, i.e., determine a plurality of RI and/or PMIs, respectively.

According to an embodiment of the present disclosure, the generating unit 330 may include the RI and/or PMI generated by the quality determining unit 350 in the information of the selected RRH.

Fig. 7 is a schematic diagram illustrating contents of information of a selected RRH according to another embodiment of the present disclosure. As shown in fig. 7, the information of the selected RRH includes: a bit map; RI and/or PMI.

According to an embodiment of the present disclosure, as shown in fig. 3, the user equipment 300 may further include a power determining unit 360 for determining a relationship between transmission powers of the plurality of RRHs in case that the selecting unit 320 selects the plurality of RRHs.

According to an embodiment of the present disclosure, the power determining unit 360 may determine the transmit power of the RRH according to the channel quality between the selected RRH and the user equipment 300. For example, the power determination unit 360 may make the channel quality of the selected RRH better, the lower the transmit power of the selected RRH. Further, the power determining unit 360 may also determine a relationship between the transmission powers of the selected RRHs according to the relationship between the channel qualities of the selected RRHs such that the larger the difference between the channel qualities of the selected RRHs is, the larger the difference between the transmission powers of the selected RRHs is.

According to an embodiment of the present disclosure, the power determining unit 360 may determine a ratio of the transmission power of each selected RRH to the reference power. Here, the power determining unit 360 may take the transmission power of one RRH among the selected RRHs as the reference power. For example, in the case of taking dB as a unit of transmission power, the reference power may be 0dB.

According to an embodiment of the present disclosure, the generating unit 330 may include a relationship between the transmission powers of the plurality of RRHs determined by the power determining unit 360 in the information of the selected RRH.

Fig. 8 is a schematic diagram illustrating contents of information of a selected RRH according to still another embodiment of the present disclosure. As shown in fig. 8, the information of the selected RRH may include: a bit map; RI and/or PMI; and the relation between the transmit powers. As shown in fig. 8, when the selection unit 320 selects RRH1 and RRH2, the relationship between the transmission powers may include a ratio between the transmission power of RRH1 and the reference power and a ratio between the transmission power of RRH2 and the reference power. Assuming that the power determination unit 360 determines that the power of RRH1 is 0dB and the power of RRH2 is 2dB, it is explained that the transmission power of RRH2 is 2dB higher than that of RRH 1.

According to an embodiment of the present disclosure, the embodiment of including the relation between the transmission powers of the plurality of RRHs determined by the power determining unit 360 in the information of the selected RRH may be applicable to a scenario in which the plurality of RRHs perform coherent transmission, or may be applicable to a scenario in which the plurality of RRHs perform incoherent transmission. Preferably, in the case that the multiple RRHs perform incoherent transmission, since the multiple RRHs send different data layers to the user equipment 300, different RRHs have different channel qualities with the user equipment 300, and an RRH with poor channel quality will cause a decrease in overall communication reliability.

As described above, the power determining unit 360 may determine the transmission power of the selected RRH according to the channel quality between the RRH and the user equipment 300 such that the better the channel quality of the selected RRH, the lower the transmission power. In this way, for RRHs with poor channel quality, the difference in channel quality can be compensated for with higher transmit power, thereby improving the reliability of communication.

Therefore, the embodiment including the relation between the transmission powers of the plurality of RRHs determined by the power determining unit 360 in the information of the selected RRH can obtain better performance in the case where the plurality of RRHs in the SU D-MIMO scenario perform incoherent transmission.

According to an embodiment of the present disclosure, as shown in fig. 3, the user equipment 300 may further include a modulation and coding scheme determining unit 370 for determining a modulation scheme and a coding scheme of the selected RRH. In the case where the selection unit 320 selects a plurality of RRHs, the modulation coding scheme determination unit 370 may determine the coding scheme of the plurality of RRHs as the same coding scheme, and the modulation coding scheme determination unit 370 may determine the coding scheme by any method known in the art, which is not limited in this disclosure. Further, modulation and coding scheme determining unit 370 may determine a modulation scheme of each of the plurality of RRHs.

According to an embodiment of the present disclosure, the modulation and coding scheme determining unit 370 may determine a modulation order of each RRH according to a channel quality of each RRH, thereby determining a modulation scheme of each RRH. Specifically, the modulation and coding scheme determining unit 370 may make the channel quality of the selected RRH better, the higher the modulation order of the selected RRH.

The following table lists some examples of modulation orders and modulation schemes.

TABLE 1

Modulation order	Modulation scheme
		2	π/2-BPSK
2	BPSK
		4	QPSK
16	16QAM
		64	64QAM
256	256QAM

Fig. 9 is a schematic diagram illustrating contents of information of a selected RRH according to still another embodiment of the present disclosure. As shown in fig. 9, the information of the selected RRH may include: a bit map; RI and/or PMI; the relation among the transmitting power of a plurality of RRHs and the modulation mode of each RRH; and the coding mode of a plurality of RRHs. As shown in fig. 9, the selection unit 320 selects RRH1 and RRH2, and thus the modulation scheme of each RRH may include the modulation scheme of RRH1 and the modulation scheme of RRH 2. In addition, although fig. 9 shows that the information of the selected RRH includes a relationship between the transmission powers of the plurality of RRHs, the modulation scheme of each RRH, and the coding scheme of the plurality of RRHs, the information of the selected RRH may include only the modulation scheme of each RRH and the coding scheme of the plurality of RRHs, and does not include a relationship between the transmission powers of the plurality of RRHs.

According to the embodiment of the present disclosure, the embodiment in which the coding modes of the multiple RRHs and the modulation modes of the respective RRHs determined by the modulation coding mode determining unit 370 are included in the information of the selected RRHs may be applicable to a scenario in which the multiple RRHs perform coherent transmission, or may be applicable to a scenario in which the multiple RRHs perform incoherent transmission. Preferably, in the case that the multiple RRHs perform incoherent transmission, since the multiple RRHs send different data layers to the user equipment 300, different RRHs have different channel qualities with the user equipment 300, and an RRH with poor channel quality will cause a decrease in overall communication reliability.

According to the embodiment of the present disclosure, since the plurality of RRHs use the same coding scheme, the user equipment 300 can complete decoding using only one decoder, and the complexity is low. In addition, the modulation mode of each RRH is determined according to the channel quality, so that the order of the modulation mode of the RRH with good channel quality is high, and the reliability of the system can be improved.

Therefore, the embodiment in which the coding scheme of the multiple RRHs and the modulation scheme of each RRH determined by the modulation coding scheme determining unit 370 are included in the information of the selected RRH can obtain better performance in the case that the multiple RRHs in the SUD-MIMO scene perform incoherent transmission.

According to an embodiment of the present disclosure, after the generating unit 330 generates information of the selected RRH and the user equipment 300 transmits the information of the selected RRH to the network side device through the communication unit 340, the network side device may perform downlink transmission using the selected RRH of the user equipment 300. In addition, in the case that the information of the selected RRHs includes a relationship between the transmission powers of the multiple RRHs, the network side device may also determine the transmission powers of the respective RRHs accordingly. In the case that the information of the selected RRH includes modulation schemes of a plurality of RRHs, the network side device may further determine the modulation scheme of each RRH according to the modulation scheme.

Fig. 10 is a signaling flow diagram illustrating a process of selecting an RRH in a scenario of downlink communication, according to an embodiment of the present disclosure. In fig. 10, a UE may be implemented by a user equipment 300. As shown in fig. 10, in step S1001, the gNB transmits CSI-RS to the UE. In step S1002, the UE measures channel quality of each RRH according to the CSI-RS, and selects one or more RRHs. In step S1003, the UE generates information of the selected RRH. In step S1004, the UE transmits information of the selected RRH to the gNB. In step S1005, the gNB performs downlink transmission using the selected RRH.

In the current standard, feedback information of SU-MIMO is mainly supported by a type i codebook (type i codebook), and can only be used in a scenario where multiple RRHs perform coherent transmission. Since the type i codebook is an equal gain precoding scheme, each RRH in the cell needs to perform downlink transmission, and the transmission power of each RRH is the same, which results in that the power allocated to the RRH with poor channel quality is wasted. As described above, according to the embodiment of the present disclosure, the selection unit 320 may reasonably select the RRH for downlink transmission, and thus may improve the communication quality of the system. Further, the power determining unit 360 may also determine the transmission power of each RRH according to the channel quality, and the modulation coding scheme determining unit 370 may also determine the modulation scheme of each RRH according to the channel quality, whereby the communication reliability of the system may be improved.

In the current standard, feedback information of MU-MIMO is mainly supported by a type ii codebook (type ii codebook), which is a non-equal gain precoding scheme, so each RRH in a cell needs to perform downlink transmission, and the transmission power of each RRH is different, which results in a large feedback overhead of the user equipment 300. As described above, according to the embodiment of the present disclosure, the selection unit 320 may remove some RRHs having poor channel quality, and thus may reduce the overhead of feedback while guaranteeing the system communication quality.

As can be seen, according to the user equipment 300 of the embodiment of the present disclosure, the RRH can be selected according to the channel quality to provide services for the user equipment 300 in downlink transmission, thereby improving the communication quality and energy efficiency of the system.

<3. Configuration example of network side device >

Fig. 11 is a block diagram showing the structure of an electronic device 1100 serving as a network-side device in a wireless communication system according to an embodiment of the present disclosure. The network side device here may be a base station, which may include a BBU and an RRH.

As shown in fig. 11, the electronic device 1100 may include a measurement unit 1110 and a selection unit 1120.

Here, each unit of the electronic device 1100 may be included in a processing circuit. Note that the electronic device 1100 may include one processing circuit or a plurality of processing circuits. Further, the processing circuitry may include various discrete functional units to perform various different functions and/or operations. It should be noted that these functional units may be physical entities or logical entities, and that units that are referred to differently may be implemented by the same physical entity.

According to an embodiment of the present disclosure, the measurement unit 1110 may measure channel quality of an uplink between each of a plurality of RRHs and a user equipment.

According to an embodiment of the present disclosure, the selecting unit 1120 may select one or more RRHs from the plurality of RRHs according to the measurement result to provide the service to the user equipment by the selected RRHs. Here, the user device may be a user device within a service range of the electronic device 1100.

As described above, according to the electronic device 1100 of the embodiment of the present disclosure, the RRH can be selected to provide services to the user device according to the channel quality, thereby improving the communication quality and energy efficiency of the system.

According to an embodiment of the present disclosure, the measurement unit 1110 may measure channel quality of an uplink between each RRH and the user equipment for each of a plurality of frequency bands, and the selection unit 1120 may select one or more RRHs. That is, the electronic device 1100 may determine, for each frequency band, one or more RRHs corresponding to the frequency band. In the present disclosure, each frequency band may include a plurality of RBs (Resource blocks) continuous in the frequency domain.

As shown in fig. 11, the electronic device 1100 may further include a communication unit 1130 for receiving information from devices other than the electronic device 1100 and/or transmitting information to devices other than the electronic device 1100.

According to an embodiment of the present disclosure, the measurement unit 1110 may consider an interference situation of the RRH when measuring the channel quality of the RRH. For example, the channel quality may be expressed in terms of SINR. Specifically, for each frequency band, the electronic device 1100 may receive an uplink reference signal, such as an SRS (Sounding Reference Signal ), from the user equipment through the communication unit 1130, and determine the RSRP of the uplink between each RRH and the user equipment for the frequency band as the power of the useful signal through measurement of the uplink reference signal. Further, for each frequency band, the electronic device 1100 may configure a section of zero-power resource on which uplink transmission is not configured for any user device within the service range of the electronic device 1100, so as to obtain the power of the interference signal by listening to the zero-power resource. Thus, the measurement unit 1110 may determine SINR between each RRH and the user equipment according to the power of the useful signal and the power of the interference signal for each frequency band.

According to an embodiment of the present disclosure, the selecting unit 1120 may select one or more RRHs with highest SINR for each frequency band, so that the selected one or more RRHs provide uplink services for the user equipment.

According to an embodiment of the present disclosure, as shown in fig. 11, the electronic device 1100 may further include a determining unit 1140, configured to determine, in a case where the user device requests uplink transmission resources, an allocated uplink frequency band according to uplink time-frequency resources allocated to the user device, so as to determine, according to the uplink frequency band of the user device, one or more RRHs corresponding to the frequency band.

According to an embodiment of the present disclosure, as shown in fig. 11, the electronic device 1100 may further include a configuration unit 1150 configured to configure a precoding matrix for the user equipment, so that the user equipment performs uplink transmission using one or more RRHs corresponding to the frequency band.

According to an embodiment of the present disclosure, after the electronic device 1100 configures a precoding matrix for the user device, the user device may perform uplink transmission with the electronic device 1100 using the selected RRH.

As shown in fig. 2 above, the serving cell serves the UE on a certain specific frequency band, and the UE is very close to RRH3 and RRH4, so that the power of the useful signals of RRH3 and RRH4 is very strong. However, in the same frequency band, UEs in neighboring cells also perform uplink transmission, so that RRH3 is subjected to inter-cell interference, and the power of an interference signal of RRH3 is also strong, so that the SINR of RRH3 is reduced. While RRH4 is subject to weak interference from neighboring cells and thus the SINR of RRH4 is high, therefore, according to embodiments of the present disclosure, on this particular frequency band, the serving cell will select RRH4 to provide uplink service for the UE.

Fig. 12 is a signaling flow diagram illustrating a process of selecting an RRH in a scenario of uplink communication according to an embodiment of the present disclosure. In fig. 12, the gNB may be implemented by an electronic device 1100. As shown in fig. 12, in step S1201, the UE transmits an SRS to the gNB. In step S1202, the gNB determines the channel quality from the measurement of SRS and the measurement of zero power resource, thereby selecting RRH for each frequency band. In step S1203, the UE requests uplink transmission resources from the gNB. In step S1204, the gNB allocates uplink transmission resources to the UE, and determines RRHs according to the uplink transmission resources. In step S1205, the gNB configures a precoding matrix for the UE such that the uplink beam of the UE is directed to the selected RRH. In step S1206, the UE performs uplink transmission using the selected RRH.

As can be seen, according to embodiments of the present disclosure, the electronic device 1100 may determine, for each frequency band, one or more RRHs corresponding to the frequency band. Further, before the ue performs uplink transmission, the electronic device 1100 may determine an RRH corresponding to the ue according to the uplink transmission resource of the ue, and configure the precoding matrix to direct the uplink beam direction of the ue to the selected RRH. That is, the electronic device 1100 may configure different precoding matrices for different frequency bands.

Furthermore, according to embodiments of the present disclosure, the electronic device 1100 considers interference when selecting an RRH, and thus can avoid an RRH that suffers from uplink inter-cell interference as much as possible. In this way, the electronic device 1100 can select an appropriate RRH for uplink transmission, so that the received SINR can be improved, and the communication quality of the system can be improved.

As can be seen, according to the electronic device 1100 of the embodiment of the present disclosure, the RRH can be selected according to the channel quality to provide services for the user device in uplink transmission, so as to improve the communication quality and energy efficiency of the system.

<4. Method example >

Next, a wireless communication method performed by the user equipment 300 in the wireless communication system according to an embodiment of the present disclosure will be described in detail.

Fig. 13 is a flowchart illustrating a wireless communication method performed by a user equipment 300 in a wireless communication system according to an embodiment of the present disclosure.

As shown in fig. 13, in step S1310, the channel quality of the downlink between each RRH of the plurality of RRHs and the user equipment 300 is measured.

Next, in step S1320, one or more RRHs are selected from the plurality of RRHs according to the measurement result, to provide services to the user equipment 300 by the selected RRHs.

Preferably, the wireless communication method further comprises: generating information of the selected RRH, wherein the information of the selected RRH comprises a bit bitmap, the bit value corresponding to the selected RRH is 1, and the bit value corresponding to the unselected RRH is 0; and transmitting information of the selected RRH to the base station apparatus.

Preferably, selecting one or more RRHs includes: determining channel quality between different RRH combinations of the plurality of RRHs and the user equipment 300; and selecting the RRH combination with the best channel quality to determine the selected RRH.

Preferably, selecting one or more RRHs includes: the first K RRHs with the best channel quality are selected, K being the minimum value that meets the data layer number requirement of the user equipment 300.

Preferably, selecting one or more RRHs includes: determining one or more RRHs with poor channel quality from the plurality of RRHs; and determining an RRH of the plurality of RRHs other than the one or more RRHs of poor channel quality as the selected RRH.

Preferably, the wireless communication method further comprises: determining RI and/or PMI according to the channel corresponding to the selected RRH; and including the determined RI and/or PMI in the information of the selected RRH.

Preferably, the wireless communication method further comprises: in the case of selecting a plurality of RRHs, determining a relationship between transmission powers of the plurality of RRHs; and including a relationship between the transmit powers of the plurality of RRHs in the information of the selected RRH.

Preferably, determining the relationship between the transmit powers of the plurality of RRHs includes: so that the better the channel quality of the selected RRH, the lower the transmit power of the selected RRH.

Preferably, the wireless communication method further comprises: under the condition that a plurality of RRHs are selected, determining a modulation mode of each RRH in the plurality of RRHs; and including the modulation scheme of each RRH in the information of the selected RRH.

Preferably, determining the modulation scheme of each RRH includes: so that the better the channel quality of the selected RRH, the higher the modulation order of the selected RRH.

According to embodiments of the present disclosure, the subject performing the above-described method may be the user equipment 300 according to embodiments of the present disclosure, and thus all embodiments hereinbefore described with respect to the user equipment 300 apply here.

Next, a wireless communication method performed by the electronic device 1100 as a network-side device in the wireless communication system according to an embodiment of the present disclosure will be described in detail.

Fig. 14 is a flowchart illustrating a wireless communication method performed by an electronic device 1100 as a network-side device in a wireless communication system according to an embodiment of the present disclosure.

As shown in fig. 14, in step S1410, channel quality of an uplink between each RRH of a plurality of RRHs and a user equipment is measured.

Next, in step S1420, one or more RRHs are selected from the plurality of RRHs according to the measurement result to provide the user equipment with services by the selected RRHs.

Preferably, the wireless communication method further comprises: for each of a plurality of frequency bands, channel quality of an uplink between each RRH and the user equipment is measured to select one or more RRHs for each frequency band.

Preferably, the wireless communication method further comprises: determining one or more RRHs corresponding to the frequency band according to the frequency band of the uplink transmission of the user equipment; and configuring a precoding matrix for the user equipment so that the user equipment can carry out uplink transmission by utilizing one or more RRHs corresponding to the frequency band.

According to embodiments of the present disclosure, the subject performing the above-described method may be the electronic device 1100 according to embodiments of the present disclosure, and thus all embodiments hereinbefore described with respect to the electronic device 1100 apply thereto.

<5. Application example >

The techniques of the present disclosure can be applied to various products.

For example, the network-side device may also be implemented as any type of base station device, such as macro eNB and small eNB, and may also be implemented as any type of gNB (base station in 5G system). The small enbs may be enbs that cover cells smaller than the macro cell, such as pico enbs, micro enbs, and home (femto) enbs. Instead, the base station may be implemented as any other type of base station, such as a NodeB and a Base Transceiver Station (BTS). The base station may include: a main body (also referred to as a base station apparatus) configured to control wireless communication; and one or more Remote Radio Heads (RRHs) disposed at a different location than the main body.

The user equipment may be implemented as a mobile terminal (such as a smart phone, a tablet Personal Computer (PC), a notebook PC, a portable game terminal, a portable/dongle type mobile router, and a digital camera device) or an in-vehicle terminal (such as a car navigation device). User equipment may also be implemented as terminals performing machine-to-machine (M2M) communication (also referred to as Machine Type Communication (MTC) terminals). Further, the user devices may be wireless communication modules (such as integrated circuit modules comprising a single die) mounted on each of the user devices described above.

< application example about base station >

(first application example)

Fig. 15 is a block diagram showing a first example of a schematic configuration of a gNB to which the techniques of the present disclosure may be applied. The gNB 1500 includes one or more antennas 1510 and a base station device 1520. The base station apparatus 1520 and each antenna 1510 may be connected to each other via an RF cable.

Each of the antennas 1510 includes a single or multiple antenna elements, such as multiple antenna elements included in a multiple-input multiple-output (MIMO) antenna, and is used for the base station device 1520 to transmit and receive wireless signals. As shown in fig. 15, the gNB 1500 may include a plurality of antennas 1510. For example, multiple antennas 1510 may be compatible with multiple frequency bands used by gNB 1500. Although fig. 15 shows an example in which the gNB 1500 includes multiple antennas 1510, the gNB 1500 may also include a single antenna 1510.

Base station device 1520 includes a controller 1521, memory 1522, a network interface 1523, and a wireless communication interface 1525.

The controller 1521 may be, for example, a CPU or DSP, and operates various functions of higher layers of the base station apparatus 1520. For example, the controller 1521 generates data packets from data in signals processed by the wireless communication interface 1525 and transfers the generated packets via the network interface 1523. The controller 1521 may bundle data from a plurality of baseband processors to generate a bundle packet and transfer the generated bundle packet. The controller 1521 may have a logic function to perform the following control: such as radio resource control, radio bearer control, mobility management, admission control and scheduling. The control may be performed in conjunction with a nearby gNB or core network node. The memory 1522 includes a RAM and a ROM, and stores programs executed by the controller 1521 and various types of control data (such as a terminal list, transmission power data, and scheduling data).

The network interface 1523 is a communication interface for connecting the base station apparatus 1520 to the core network 1524. The controller 1521 may communicate with core network nodes or additional gnbs via a network interface 1523. In this case, the gNB 1500 and the core network node or other gnbs may be connected to each other through logical interfaces (such as an S1 interface and an X2 interface). The network interface 1523 may also be a wired communication interface or a wireless communication interface for a wireless backhaul. If the network interface 1523 is a wireless communication interface, the network interface 1823 may use a higher frequency band for wireless communication than the frequency band used by the wireless communication interface 1525.

Wireless communication interface 1525 supports any cellular communication schemes, such as Long Term Evolution (LTE) and LTE-advanced, and provides wireless connectivity to terminals located in cells of the gNB 1500 via antenna 1510. The wireless communication interface 1525 may generally include, for example, a baseband (BB) processor 1526 and RF circuitry 1527. The BB processor 1526 may perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and performs various types of signal processing of layers such as L1, medium Access Control (MAC), radio Link Control (RLC), and Packet Data Convergence Protocol (PDCP). Instead of the controller 1521, the bb processor 1526 may have some or all of the above-described logic functions. The BB processor 1526 may be a memory storing a communication control program, or a module including a processor configured to execute a program and related circuits. The update program may cause the functionality of the BB processor 1526 to change. The module may be a card or blade that is inserted into a slot of the base station apparatus 1520. Alternatively, the module may be a chip mounted on a card or blade. Meanwhile, the RF circuit 1527 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via the antenna 1510.

As shown in fig. 15, the wireless communication interface 1525 may include a plurality of BB processors 1526. For example, the plurality of BB processors 1526 may be compatible with the plurality of frequency bands used by the gNB 1500. As shown in fig. 15, the wireless communication interface 1525 may include a plurality of RF circuits 1527. For example, the plurality of RF circuits 1527 may be compatible with a plurality of antenna elements. Although fig. 15 shows an example in which the wireless communication interface 1525 includes a plurality of BB processors 1526 and a plurality of RF circuits 1527, the wireless communication interface 1525 may also include a single BB processor 1526 or a single RF circuit 1527.

(second application example)

Fig. 16 is a block diagram showing a second example of a schematic configuration of a gNB to which the techniques of the present disclosure may be applied. The gNB 1630 includes one or more antennas 1640, a base station device 1650, and an RRH 1660. The RRH 1660 and each antenna 1640 can be connected to each other via RF cables. Base station apparatus 1650 and RRH 1660 may be connected to each other via high-speed lines such as fiber optic cables.

Each of the antennas 1640 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for RRH 1660 to transmit and receive wireless signals. As shown in fig. 16, the gNB 1630 may include a plurality of antennas 1640. For example, multiple antennas 1640 may be compatible with multiple frequency bands used by the gNB 1930. Although fig. 16 shows an example in which the gNB 1630 includes a plurality of antennas 1640, the gNB 1630 may also include a single antenna 1640.

Base station apparatus 1650 includes a controller 1651, a memory 1652, a network interface 1653, a wireless communication interface 1655, and a connection interface 1657. The controller 1651, memory 1652, and network interface 1653 are the same as the controller 1521, memory 1522, and network interface 1523 described with reference to fig. 15.

Wireless communication interface 1655 supports any cellular communication schemes (such as LTE and LTE-advanced) and provides wireless communication via RRH 1660 and antenna 1640 to terminals located in the sector corresponding to RRH 1660. Wireless communication interface 1655 may generally include, for example, a BB processor 1656. The BB processor 1656 is identical to the BB processor 1526 described with reference to fig. 15, except that the BB processor 1656 is connected to the RF circuitry 1664 of the RRH 1660 via connection interface 1657. As shown in fig. 16, wireless communication interface 1655 may include a plurality of BB processors 1656. For example, the plurality of BB processors 1656 may be compatible with the plurality of frequency bands used by the gNB 1630. Although fig. 16 shows an example in which wireless communication interface 1655 includes a plurality of BB processors 1656, wireless communication interface 1655 may also include a single BB processor 1656.

Connection interface 1657 is an interface for connecting base station device 1650 (wireless communication interface 1655) to RRH 1660. Connection interface 1657 may also be a communication module for connecting base station device 1650 (wireless communication interface 1655) to communications in the above-described high-speed lines of RRH 1660.

RRH 1660 includes a connection interface 1661 and a wireless communication interface 1663.

The connection interface 1661 is an interface for connecting the RRH 1660 (wireless communication interface 1663) to the base station apparatus 1650. Connection interface 1661 may also be a communication module for communication in high-speed lines as described above.

Wireless communication interface 1663 transmits and receives wireless signals via antenna 1640. The wireless communication interface 1663 may generally include, for example, RF circuitry 1664.RF circuitry 1664 may include, for example, mixers, filters, and amplifiers, and transmits and receives wireless signals via antenna 1640. As shown in fig. 16, wireless communication interface 1663 may include a plurality of RF circuits 1664. For example, multiple RF circuits 1664 may support multiple antenna elements. Although fig. 16 shows an example in which the wireless communication interface 1663 includes a plurality of RF circuits 1664, the wireless communication interface 1663 may also include a single RF circuit 1664.

In the gNB 1500 and the gNB 1630 shown in fig. 15 and 16, the measurement unit 1110, the selection unit 1120, the determination unit 1140, and the configuration unit 1150 described by fig. 11 may be implemented by the controller 1521 and/or the controller 1651. At least a portion of the functionality may also be implemented by the controller 1521 and the controller 1651. For example, the controller 1521 and/or the controller 1651 may perform functions of measuring channel quality, selecting RRHs, determining RRHs corresponding to frequency bands of user equipment uplink transmission, and configuring a precoding matrix by executing instructions stored in the respective memories.

< application example regarding terminal device >

(first application example)

Fig. 17 is a block diagram showing an example of a schematic configuration of a smartphone 1700 to which the techniques of the present disclosure can be applied. The smartphone 1700 includes a processor 1701, memory 1702, storage 1703, an external connection interface 1704, an imaging device 1706, a sensor 1707, a microphone 1708, an input device 1709, a display device 1710, a speaker 1711, a wireless communication interface 1712, one or more antenna switches 1715, one or more antennas 1716, a bus 1717, a battery 1718, and an auxiliary controller 1719.

The processor 1701 may be, for example, a CPU or a system on a chip (SoC) and controls functions of an application layer and additional layers of the smartphone 1700. The memory 1702 includes a RAM and a ROM, and stores data and programs executed by the processor 1701. The storage 1703 may include a storage medium such as a semiconductor memory and a hard disk. The external connection interface 1704 is an interface for connecting external devices such as a memory card and a Universal Serial Bus (USB) device to the smartphone 1700.

The image pickup device 1706 includes an image sensor such as a Charge Coupled Device (CCD) and a Complementary Metal Oxide Semiconductor (CMOS), and generates a captured image. The sensor 1707 may include a set of sensors such as a measurement sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 1708 converts sound input to the smartphone 1700 into an audio signal. The input device 1709 includes, for example, a touch sensor, a keypad, a keyboard, buttons, or switches configured to detect a touch on the screen of the display device 1710, and receives an operation or information input from a user. The display device 1710 includes a screen, such as a Liquid Crystal Display (LCD) and an Organic Light Emitting Diode (OLED) display, and displays an output image of the smartphone 1700. The speaker 1711 converts audio signals output from the smartphone 1700 into sound.

The wireless communication interface 1712 supports any cellular communication schemes (such as LTE and LTE-advanced) and performs wireless communication. The wireless communication interface 1712 may generally include, for example, a BB processor 1713 and RF circuitry 1714. The BB processor 1713 can perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and performs various types of signal processing for wireless communication. Meanwhile, the RF circuit 1714 may include, for example, a mixer, a filter, and an amplifier, and transmits and receives wireless signals via the antenna 1716. The wireless communication interface 1712 may be one chip module with the BB processor 1713 and the RF circuitry 1714 integrated thereon. As shown in fig. 17, the wireless communication interface 1712 may include a plurality of BB processors 1713 and a plurality of RF circuits 1714. Although fig. 17 shows an example in which the wireless communication interface 1712 includes a plurality of BB processors 1713 and a plurality of RF circuits 1714, the wireless communication interface 1712 may also include a single BB processor 1713 or a single RF circuit 1714.

Further, the wireless communication interface 1712 may support other types of wireless communication schemes, such as a short-range wireless communication scheme, a near-field communication scheme, and a wireless Local Area Network (LAN) scheme, in addition to the cellular communication scheme. In this case, the wireless communication interface 1712 may include the BB processor 1713 and the RF circuitry 1714 for each wireless communication scheme.

Each of the antenna switches 1715 switches the connection destination of the antenna 1716 between a plurality of circuits (e.g., circuits for different wireless communication schemes) included in the wireless communication interface 1712.

Each of the antennas 1716 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for transmitting and receiving wireless signals by the wireless communication interface 1712. As shown in fig. 17, the smartphone 1700 may include a plurality of antennas 1716. Although fig. 17 shows an example in which the smartphone 1700 includes multiple antennas 1716, the smartphone 1700 may also include a single antenna 1716.

Further, the smartphone 1700 may include an antenna 1716 for each wireless communication scheme. In this case, the antenna switch 1715 may be omitted from the configuration of the smartphone 1700.

The bus 1717 connects the processor 1701, the memory 1702, the storage device 1703, the external connection interface 1704, the imaging device 1706, the sensor 1707, the microphone 1708, the input device 1709, the display device 1710, the speaker 1711, the wireless communication interface 1712, and the sub-controller 1719 to each other. The battery 1718 provides power to the various blocks of the smartphone 1700 shown in fig. 17 via a feeder line, which is partially shown as a dashed line in the figure. The auxiliary controller 1719 operates the minimal necessary functions of the smartphone 1700, for example, in sleep mode.

In the smart phone 1700 shown in fig. 17, the measurement unit 310, the selection unit 320, the generation unit 330, the quality determination unit 350, the power determination unit 360, and the modulation coding scheme determination unit 370 described by fig. 3 may be implemented by the processor 1701 or the auxiliary controller 1719. At least a portion of the functionality may also be implemented by the processor 1701 or the auxiliary controller 1719. For example, the processor 1701 or the supplementary controller 1719 may perform functions of measuring channel quality, selecting RRHs, generating information of the selected RRHs, determining RI and/or PMI, determining power relation between different RRHs, determining coding scheme and modulation scheme of different RRHs by executing instructions stored in the memory 1702 or the storage 1703.

(second application example)

Fig. 18 is a block diagram showing an example of a schematic configuration of a car navigation device 1820 to which the technology of the present disclosure can be applied. The car navigation device 1820 includes a processor 1821, memory 1822, a Global Positioning System (GPS) module 1824, a sensor 1825, a data interface 1826, a content player 1827, a storage media interface 1828, an input device 1829, a display device 1830, a speaker 1831, a wireless communication interface 1833, one or more antenna switches 1836, one or more antennas 1837, and a battery 1838.

The processor 1821 may be, for example, a CPU or SoC, and controls the navigation functions and additional functions of the car navigation device 1820. The memory 1822 includes RAM and ROM, and stores data and programs executed by the processor 1821.

The GPS module 1824 uses GPS signals received from GPS satellites to measure the position (such as latitude, longitude, and altitude) of the car navigation device 1820. The sensor 1825 may include a set of sensors, such as a gyroscopic sensor, a geomagnetic sensor, and an air pressure sensor. The data interface 1826 is connected to, for example, an in-vehicle network 1841 via a terminal not shown, and acquires data generated by the vehicle (such as vehicle speed data).

The content player 1827 reproduces content stored in a storage medium (such as a CD and a DVD) inserted into the storage medium interface 1828. The input device 1829 includes, for example, a touch sensor, button, or switch configured to detect a touch on the screen of the display device 1830, and receives an operation or information input from a user. The display device 1830 includes a screen such as an LCD or OLED display, and displays images of navigation functions or reproduced content. The speaker 1831 outputs sound of the navigation function or reproduced content.

The wireless communication interface 1833 supports any cellular communication scheme (such as LTE and LTE-advanced) and performs wireless communication. The wireless communication interface 1833 may generally include, for example, a BB processor 1834 and RF circuitry 1835. The BB processor 1834 may perform, for example, encoding/decoding, modulation/demodulation, and multiplexing/demultiplexing, and perform various types of signal processing for wireless communication. Meanwhile, the RF circuit 1835 may include, for example, a mixer, a filter, and an amplifier, and transmit and receive wireless signals via the antenna 1837. The wireless communication interface 1833 may also be one chip module with the BB processor 1834 and RF circuitry 1835 integrated thereon. As shown in fig. 18, the wireless communication interface 1833 may include a plurality of BB processors 1834 and a plurality of RF circuits 1835. Although fig. 18 shows an example in which the wireless communication interface 1833 includes a plurality of BB processors 1834 and a plurality of RF circuits 1835, the wireless communication interface 1833 may also include a single BB processor 1834 or a single RF circuit 1835.

Further, the wireless communication interface 1833 may support another type of wireless communication scheme, such as a short-range wireless communication scheme, a near-field communication scheme, and a wireless LAN scheme, in addition to the cellular communication scheme. In this case, the wireless communication interface 1833 may include a BB processor 1834 and RF circuitry 1835 for each wireless communication scheme.

Each of the antenna switches 1836 switches the connection destination of the antenna 1837 between a plurality of circuits (such as circuits for different wireless communication schemes) included in the wireless communication interface 1833.

Each of the antennas 1837 includes a single or multiple antenna elements (such as multiple antenna elements included in a MIMO antenna) and is used for wireless communication interface 1833 to transmit and receive wireless signals. As shown in fig. 18, the car navigation device 1820 may include a plurality of antennas 1837. Although fig. 18 shows an example in which the car navigation device 1820 includes a plurality of antennas 1837, the car navigation device 1820 may also include a single antenna 1837.

Further, the car navigation device 1820 can include an antenna 1837 for each wireless communication scheme. In this case, the antenna switch 1836 may be omitted from the configuration of the car navigation device 1820.

The battery 1838 provides power to the various blocks of the car navigation device 1820 shown in fig. 18 via a feeder line, which is partially shown as a dashed line. The battery 1838 accumulates electric power supplied from the vehicle.

In the car navigation device 1820 shown in fig. 18, the measuring unit 310, the selecting unit 320, the generating unit 330, the quality determining unit 350, the power determining unit 360, and the modulation coding scheme determining unit 370 described by using fig. 3 may be implemented by the processor 1821. At least a portion of the functionality may also be implemented by the processor 1821. For example, the processor 1821 may perform functions of measuring channel quality, selecting RRHs, generating information for the selected RRHs, determining RI and/or PMI, determining power relationships between different RRHs, determining coding schemes, and modulation schemes for the different RRHs by executing instructions stored in the memory 1822.

The techniques of this disclosure may also be implemented as an in-vehicle system (or vehicle) 1840 that includes one or more of the car navigation device 1820, the in-vehicle network 1841, and the vehicle module 1842. The vehicle module 1842 generates vehicle data (such as vehicle speed, engine speed, and fault information), and outputs the generated data to the in-vehicle network 1841.

The preferred embodiments of the present disclosure have been described above with reference to the accompanying drawings, but the present disclosure is of course not limited to the above examples. Various changes and modifications may be made by those skilled in the art within the scope of the appended claims, and it is understood that such changes and modifications will naturally fall within the technical scope of the present disclosure.

For example, elements shown in a functional block diagram shown in the figures and indicated by dashed boxes each represent a functional element that is optional in the corresponding apparatus, and the individual optional functional elements may be combined in a suitable manner to achieve the desired functionality.

For example, a plurality of functions included in one unit in the above embodiments may be implemented by separate devices. Alternatively, the functions realized by the plurality of units in the above embodiments may be realized by separate devices, respectively. In addition, one of the above functions may be implemented by a plurality of units. Needless to say, such a configuration is included in the technical scope of the present disclosure.

In this specification, the steps described in the flowcharts include not only processes performed in time series in the order described, but also processes performed in parallel or individually, not necessarily in time series. Further, even in the steps of time-series processing, needless to say, the order may be appropriately changed.

Further, the present disclosure may have a configuration as described below.

1. A user equipment comprising processing circuitry configured to:

measuring a channel quality of a downlink between each of a plurality of remote radio heads RRHs and the user equipment; and

and selecting one or more RRHs from the plurality of RRHs according to the measurement result so as to provide service for the user equipment by the selected RRHs.

2. The user equipment of claim 1, wherein the processing circuit is further configured to:

generating information of the selected RRH, the information of the selected RRH including a bit map in which a value of a bit corresponding to the selected RRH is 1 and a value of a bit corresponding to an unselected RRH is 0; and

and transmitting the information of the selected RRH to the base station equipment.

3. The user equipment of claim 1, wherein the processing circuit is further configured to:

Determining channel quality between different RRH combinations of the plurality of RRHs and the user equipment; and

the RRH combination with the best channel quality is selected to determine the selected RRH.

4. The user equipment of claim 1, wherein the processing circuit is further configured to:

and selecting the first K RRHs with the best channel quality, wherein K is the minimum value meeting the data layer number requirement of the user equipment.

5. The user equipment of claim 1, wherein the processing circuit is further configured to:

determining one or more RRHs with poor channel quality from the plurality of RRHs; and

and determining RRHs except for one or more RRHs with poor channel quality in the plurality of RRHs as the selected RRH.

6. The user equipment of claim 2, wherein the processing circuit is further configured to:

determining RI and/or PMI according to the channel corresponding to the selected RRH; and

the determined RI and/or PMI is included in the information of the selected RRH.

7. The user equipment of claim 2, wherein the processing circuit is further configured to:

in the case of selecting a plurality of RRHs, determining a relationship between transmission powers of the plurality of RRHs; and

the relation between the transmission powers of the plurality of RRHs is included in the information of the selected RRH.

8. The user equipment of claim 7, wherein the processing circuit is further configured to:

the relationship between the transmit powers of the plurality of RRHs is determined such that the better the channel quality of the selected RRH, the lower the transmit power of the selected RRH.

9. The user equipment of claim 2, wherein the processing circuit is further configured to:

under the condition that a plurality of RRHs are selected, determining a modulation mode of each RRH in the plurality of RRHs; and

and the modulation mode of each RRH is included in the information of the selected RRH.

10. The user equipment of claim 9, wherein the processing circuit is further configured to:

the modulation mode of each RRH is determined so that the better the channel quality of the selected RRH is, the higher the modulation order of the selected RRH is.

11. An electronic device comprising processing circuitry configured to:

measuring channel quality of an uplink between each of a plurality of remote radio heads RRHs and a user equipment; and

and selecting one or more RRHs from the plurality of RRHs according to the measurement result so as to provide service for the user equipment by the selected RRHs.

12. The electronic device of claim 11, wherein the processing circuit is further configured to:

For each of a plurality of frequency bands, measuring channel quality of an uplink between the each RRH and the user equipment to select one or more RRHs for each frequency band.

13. The electronic device of claim 12, wherein the processing circuit is further configured to:

determining one or more RRHs corresponding to the frequency band according to the frequency band of the uplink transmission of the user equipment; and

and configuring a precoding matrix for the user equipment so that the user equipment can carry out uplink transmission by using one or more RRHs corresponding to the frequency band.

14. A method of wireless communication performed by a user device, comprising:

measuring a channel quality of a downlink between each of a plurality of remote radio heads RRHs and the user equipment; and

and selecting one or more RRHs from the plurality of RRHs according to the measurement result so as to provide service for the user equipment by the selected RRHs.

15. The wireless communication method of claim 14, wherein the wireless communication method further comprises:

generating information of the selected RRH, the information of the selected RRH including a bit map in which a value of a bit corresponding to the selected RRH is 1 and a value of a bit corresponding to an unselected RRH is 0; and

And transmitting the information of the selected RRH to the base station equipment.

16. The wireless communication method of claim 14, wherein selecting one or more RRHs comprises:

determining channel quality between different RRH combinations of the plurality of RRHs and the user equipment; and

the RRH combination with the best channel quality is selected to determine the selected RRH.

17. The wireless communication method of claim 14, wherein selecting one or more RRHs comprises:

and selecting the first K RRHs with the best channel quality, wherein K is the minimum value meeting the data layer number requirement of the user equipment.

18. The wireless communication method of claim 14, wherein selecting one or more RRHs comprises:

determining one or more RRHs with poor channel quality from the plurality of RRHs; and

and determining RRHs except for one or more RRHs with poor channel quality in the plurality of RRHs as the selected RRH.

19. The wireless communication method of claim 15, wherein the wireless communication method further comprises:

determining RI and/or PMI according to the channel corresponding to the selected RRH; and

the determined RI and/or PMI is included in the information of the selected RRH.

20. The wireless communication method of claim 15, wherein the wireless communication method further comprises:

In the case of selecting a plurality of RRHs, determining a relationship between transmission powers of the plurality of RRHs; and

the relation between the transmission powers of the plurality of RRHs is included in the information of the selected RRH.

21. The wireless communication method of claim 20, wherein determining a relationship between transmit powers of the plurality of RRHs comprises:

so that the better the channel quality of a selected RRH, the lower the transmit power of the selected RRH.

22. The wireless communication method of claim 15, wherein the wireless communication method further comprises:

under the condition that a plurality of RRHs are selected, determining a modulation mode of each RRH in the plurality of RRHs; and

and the modulation mode of each RRH is included in the information of the selected RRH.

23. The wireless communication method of claim 22, wherein determining the modulation scheme for each RRH comprises:

so that the better the channel quality of a selected RRH, the higher the modulation order of the selected RRH.

24. A method of wireless communication performed by an electronic device, comprising:

measuring channel quality of an uplink between each of a plurality of remote radio heads RRHs and a user equipment; and

and selecting one or more RRHs from the plurality of RRHs according to the measurement result so as to provide service for the user equipment by the selected RRHs.

25. The wireless communication method of claim 24, wherein the wireless communication method further comprises:

for each of a plurality of frequency bands, measuring channel quality of an uplink between the each RRH and the user equipment to select one or more RRHs for each frequency band.

26. The wireless communication method of claim 25, wherein the wireless communication method further comprises:

determining one or more RRHs corresponding to the frequency band according to the frequency band of the uplink transmission of the user equipment; and

and configuring a precoding matrix for the user equipment so that the user equipment can carry out uplink transmission by using one or more RRHs corresponding to the frequency band.

27. A computer readable storage medium comprising executable computer instructions which, when executed by a computer, cause the computer to perform the wireless communication method according to any one of claims 14-26.

Although the embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, it should be understood that the above-described embodiments are merely illustrative of the present disclosure and not limiting thereof. Various modifications and alterations to the above described embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope of the disclosure is, therefore, indicated only by the appended claims and their equivalents.

Claims (10)

1. A user equipment comprising processing circuitry configured to:

measuring a channel quality of a downlink between each of a plurality of remote radio heads RRHs and the user equipment; and

and selecting one or more RRHs from the plurality of RRHs according to the measurement result so as to provide service for the user equipment by the selected RRHs.

2. The user equipment of claim 1, wherein the processing circuit is further configured to:

generating information of the selected RRH, the information of the selected RRH including a bit map in which a value of a bit corresponding to the selected RRH is 1 and a value of a bit corresponding to an unselected RRH is 0; and

and transmitting the information of the selected RRH to the base station equipment.

3. The user equipment of claim 1, wherein the processing circuit is further configured to:

determining channel quality between different RRH combinations of the plurality of RRHs and the user equipment; and

the RRH combination with the best channel quality is selected to determine the selected RRH.

4. The user equipment of claim 1, wherein the processing circuit is further configured to:

and selecting the first K RRHs with the best channel quality, wherein K is the minimum value meeting the data layer number requirement of the user equipment.

5. The user equipment of claim 1, wherein the processing circuit is further configured to:

determining one or more RRHs with poor channel quality from the plurality of RRHs; and

and determining RRHs except for one or more RRHs with poor channel quality in the plurality of RRHs as the selected RRH.

6. The user equipment of claim 2, wherein the processing circuit is further configured to:

determining RI and/or PMI according to the channel corresponding to the selected RRH; and

the determined RI and/or PMI is included in the information of the selected RRH.

7. An electronic device comprising processing circuitry configured to:

measuring channel quality of an uplink between each of a plurality of remote radio heads RRHs and a user equipment; and

and selecting one or more RRHs from the plurality of RRHs according to the measurement result so as to provide service for the user equipment by the selected RRHs.

8. A method of wireless communication performed by a user device, comprising:

measuring a channel quality of a downlink between each of a plurality of remote radio heads RRHs and the user equipment; and

and selecting one or more RRHs from the plurality of RRHs according to the measurement result so as to provide service for the user equipment by the selected RRHs.

9. A method of wireless communication performed by an electronic device, comprising:

measuring channel quality of an uplink between each of a plurality of remote radio heads RRHs and a user equipment; and

and selecting one or more RRHs from the plurality of RRHs according to the measurement result so as to provide service for the user equipment by the selected RRHs.

10. A computer readable storage medium comprising executable computer instructions which, when executed by a computer, cause the computer to perform the wireless communication method according to any of claims 8-9.