WO2022061530A1

WO2022061530A1 - Mobile station scheduling method, access device, device, storage medium, and program product

Info

Publication number: WO2022061530A1
Application number: PCT/CN2020/116870
Authority: WO
Inventors: 张洁; 马万里; 王力; 谭爽
Original assignee: 西门子股份公司; 西门子（中国）有限公司
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2022-03-31

Abstract

Provided in the embodiments of the present invention are a mobile station scheduling method, an access device, a device, a storage medium, and a program product. The mobile station scheduling method is applied to an access device having a distributed antenna structure, and the distributed antenna structure comprises multiple antennas that transmit data to multiple mobile stations for the current scheduling. The method comprises: determining a transmission signal quality level corresponding to each antenna and each mobile station; on the basis of the transmission signal quality level, in the multiple mobile stations, determining a group of mobile stations for the current transmission and a common antenna set thereof; and scheduling the group of mobile stations, so as to perform downlink data transmission to the group of mobile stations by means of the common antenna set. According to the solution of the embodiments of the present invention, the overall efficiency of a system based on a distributed antenna structure is improved.

Description

Mobile station scheduling method, access device, device, storage medium and program product

technical field

Embodiments of the present invention relate to the field of communication technologies, and in particular, to a mobile station scheduling method, access device, device, storage medium, and program product.

Background technique

In networks such as Wireless Local Area Network (WLAN), multiple input multiple output (MIMO) technology uses multiple antennas to send multiple data streams to users at the same time, which greatly improves the data throughput of the network. Rate. In addition, the communication technology using Orthogonal Frequency Division Multiple Access (OFDMA) makes it possible to transmit data to multiple users in the same time domain, which further improves the spectrum utilization efficiency in wireless communication.

In order to further improve the spatial coverage efficiency of the antennas in the wireless local area network, different antennas in the antennas are set to have a certain distance, forming a distributed antenna structure.

The distributed antenna structure does improve the spatial coverage of the antenna to a certain extent, but there is still room for improvement in the overall efficiency of the system based on the distributed antenna structure.

SUMMARY OF THE INVENTION

In order to solve the above problem, embodiments of the present invention provide a mobile station scheduling method, access device, device, storage medium, and program product, so as to at least partially solve the above problem.

A first aspect of the embodiments of the present invention provides a mobile station scheduling method, which is applied to an access device having a distributed antenna structure, where the distributed antenna structure includes a method for transmitting data to a plurality of mobile stations used for current scheduling. a plurality of antennas, the method comprising: determining a transmission signal quality level for each antenna corresponding to each mobile station; and, based on the transmission signal quality level, among the plurality of mobile stations, determining a group for current transmission A mobile station and a set of shared antennas thereof; scheduling the set of mobile stations to perform downlink data transmission to the set of mobile stations using the set of shared antennas.

Since a group of mobile stations and their shared antenna sets are determined based on the transmission signal quality level, the scheduling based on the distributed antenna structure is improved via the shared antenna set on the premise that the data transmission quality of a group of mobile stations is guaranteed by the transmission signal quality level efficiency, thereby improving the overall efficiency of the network system.

In another implementation manner of the present invention, the scheduling the group of mobile stations to perform downlink data transmission to the group of mobile stations by using the shared antenna set includes: The physical layer control module sends the antenna information of the shared antenna set, so that the physical layer control module of the shared antenna set performs downlink data transmission to the group of mobile stations.

Since the shared antenna set sends the antenna information of the shared antenna set to the physical layer control module, the physical layer control module of the shared antenna set can use the antenna information of the shared antenna set to realize downlink data transmission when performing physical layer control, which further improves the scheduling efficiency.

In another implementation manner of the present invention, the antenna information of the shared antenna set is sent to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set sends the information to the group of mobile stations. Downlink data transmission, comprising: sending antenna information of the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set moves to the group via the shared antenna set The station performs downlink data transmission in a multiple-input multiple-output manner.

Since the physical layer control module of the shared antenna set can perform downlink data transmission to a group of mobile stations in a multiple-input multiple-output manner via the shared antenna set, the scheduling efficiency is further improved.

In another implementation manner of the present invention, the antenna information of the shared antenna set is sent to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set sends the information to the group of mobile stations. Downlink data transmission includes: sending antenna information of each antenna in the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set uses single data via the respective antennas The streaming mode performs downlink data transmission to each of the group of mobile stations.

Since the physical layer control module sharing the set of antennas can still perform downlink data transmission to each of a group of mobile stations via each antenna in a single data stream transmission mode when performing physical layer control, the flexibility of scheduling is improved.

In another implementation manner of the present invention, the determining, based on the transmission signal quality level, among the plurality of mobile stations, a group of mobile stations for current transmission and a set of shared antennas thereof includes: comparing the The transmission signal quality level and the preset evaluation level threshold, among the multiple mobile stations, determine a group of mobile stations used for current transmission and their shared antenna set, wherein the transmission signal quality level corresponding to the shared antenna set above or equal to the evaluation level threshold.

Since the data processing amount is reduced by comparing the transmission signal quality level with the preset evaluation level threshold, the communication efficiency is improved in a communication scenario with high real-time requirements.

In another implementation manner of the present invention, the transmission signal quality level includes multiple levels, among the multiple levels, a first level is higher than a second level, and the transmission signal quality of the first level is higher than all levels The transmission signal quality of the second level, wherein the shared antenna set corresponds to the first number of mobile stations determined according to the transmission signal quality when the transmission signal quality level is higher than or equal to the first level, and the shared antenna set is When the transmission signal quality level is higher than or equal to the second level corresponding to the second number of mobile stations determined according to the transmission signal quality, the method further includes: if the first number of mobile stations is less than the second number of mobile stations, and If the second level is higher than the lowest level among the plurality of levels, the second level is determined as the evaluation level threshold.

Since the second level is determined as the evaluation level threshold, and the signal quality level of the second level is higher than the signal quality level of the lowest level, the data transmission quality corresponding to the second level is guaranteed, in addition, since the second level is scheduled The number of mobile stations corresponding to the second number of mobile stations in the rank further improves the scheduling efficiency.

In another implementation manner of the present invention, the method further includes: if the first number of mobile stations is equal to the second number of mobile stations, determining the first level as the evaluation level threshold.

Since the number of the first mobile stations is equal to the number of the second mobile stations, the first level is determined as the evaluation level threshold, which improves the data transmission quality on the premise of ensuring the scheduling efficiency.

In another implementation manner of the present invention, the method further includes: if the number of the first mobile stations is less than the number of the second mobile stations, and the second level is the lowest level among the plurality of levels, The first level is then determined as the evaluation level threshold.

Since the second level is the lowest level, the first level higher than the second level is determined as the evaluation level threshold, which ensures the data transmission quality.

In another implementation manner of the present invention, the method further includes: receiving downlink received signal strength indication information sent by each mobile station, wherein the determining the transmission signal quality level corresponding to each antenna and each mobile station, Including: determining the transmission signal quality level corresponding to each antenna and each mobile station based on the downlink received signal strength indication information sent by each mobile station and the signal strength ratio information of each antenna in the plurality of antennas .

Since the downlink received signal strength indication information is used to evaluate the downlink received signal quality, the received signal quality has a high reference value for the transmission quality. Therefore, the transmission signal quality level is determined based on the downlink received signal strength indication information, which improves the transmission signal quality. The accuracy of the level, in addition, can also improve the backward compatibility with the existing technology. In addition, using the signal strength ratio information of each antenna in the multiple antennas can improve the data processing efficiency on the premise of having a higher transmission quality reference value.

In another implementation manner of the present invention, the downlink received signal strength indication information sent by each mobile station is a plurality of received signal strength information collected by each mobile station based on its own multiple radio frequency chains; The downlink received signal strength indication information sent by each mobile station is joint signal strength information sent by each mobile station, wherein the joint signal strength information is obtained by combining the plurality of received signal strength information.

Since the received signal strength information collected by each mobile station based on its own multiple radio frequency chains can reflect the signal reception situation of each radio frequency chain, the downlink received signal strength indication information has greater reference value. In addition, the joint strength signal information is obtained by combining the plurality of received signal strength information, thus reducing the amount of information processing and improving the information processing efficiency while ensuring the reference value of the indication information.

A second aspect of the embodiments of the present invention provides an access device, the device includes multiple antennas for transmitting data to multiple mobile stations used for current scheduling, the access device includes: a first determining module, determining a transmission signal quality level corresponding to each antenna and each mobile station; a second determining module, based on the transmission signal quality level, among the plurality of mobile stations, determines a group of mobile stations used for current transmission and their corresponding mobile stations A set of shared antennas; a scheduling module for scheduling the group of mobile stations to perform downlink data transmission to the group of mobile stations by using the set of shared antennas.

A third aspect of the embodiments of the present invention provides an electronic device including: one or more processors, a communication interface, a memory and a communication bus, and one or more programs. The one or more processors, the communication interface, and the memory communicate with each other through the communication bus, and one or more programs are stored in the memory and configured to be executed by the one or more A plurality of processors perform: a method according to the first aspect.

A fourth aspect of the embodiments of the present invention provides a storage medium, where the storage medium includes a stored program. When the program runs, the device including the storage medium is controlled to execute the method of the first aspect.

A fifth aspect of embodiments of the present invention provides a computer program product tangibly stored on a computer-readable medium and comprising computer-readable instructions that, when executed, cause at least one A processor performs the method according to the first aspect.

Since a group of mobile stations and their shared antenna sets are determined based on the transmission signal quality level, the distributed antenna structure-based system is improved through the shared antenna set on the premise that the data transmission quality of a group of mobile stations is guaranteed through the transmission signal quality level. Scheduling efficiency, thereby improving the overall efficiency of the network system.

Description of drawings

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. in,

1 is a schematic diagram of a network architecture of a wireless local area network to which an embodiment of the present invention is applicable;

2 is a schematic flowchart of a mobile station scheduling method according to another embodiment of the present invention;

3 is a schematic interaction diagram of a mobile station scheduling method according to another embodiment of the present invention;

4 is a schematic block diagram of an access device according to another embodiment of the present invention;

5A is a schematic diagram of an example of a mobile station scheduling method according to another embodiment of the present invention;

5B is a schematic diagram of another example of a mobile station scheduling method according to another embodiment of the present invention;

5C is a schematic diagram of another example of a mobile station scheduling method according to another embodiment of the present invention;

FIG. 6 is a schematic block diagram of an access device according to another embodiment of the present invention; and

FIG. 7 is a schematic block diagram of an electronic device according to another embodiment of the present invention.

List of reference numbers:

110: access equipment; 120, 121, 122, 123, 124: mobile station;

S210: Determine the transmission signal quality level corresponding to each antenna and each mobile station;

S220: Based on the transmission signal quality level, among a plurality of mobile stations, determine a group of mobile stations and their shared antenna sets used for current transmission;

S230: Schedule a group of mobile stations to perform downlink data transmission to a group of mobile stations by using a shared antenna set;

S301: The mobile station 120 sends a message to the access device 110, and the message includes information such as RSSI;

S302: The access device 110 performs processing based on the foregoing information to determine a shared antenna set;

S303: The access device 110 transmits downlink data to the mobile station 120 based on the shared antenna set;

410: antenna evaluation module; 420: scheduler; 430: physical layer control module;

510: access equipment; 511, 512, 513, 514, 515: antenna; 521, 522, 523, 524: mobile station;

610: a first determination module; 620: a second determination module; 630: a scheduling module;

710: processor; 720: communication interface; 730: memory; 740: communication bus.

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the embodiments of the present invention, specific implementations of the embodiments of the present invention will now be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram of a network architecture of a wireless local area network to which an embodiment of the present invention is applied. As shown, communication between access device 110 and mobile station 121, mobile station 122, mobile station 123, and mobile station 124 takes place in a wireless local area network. WLAN standards include standards such as IEEE802.11ac, IEEE802.11ax, which employ not only MIMO technology, but also downlink OFDMA (Orthogonal Frequency Division Multiple Access) technology, and even uplink OFDMA. The multi-antenna communication mode is used to achieve higher data rates (M greater than or equal to 2) by simultaneously transmitting M data streams on spatially separated transmit antennas in parallel. This technology requires at least M radio frequency signal chains to be integrated into a WLAN module or chipset. The RF signal chain includes but is not limited to switches, power amplifiers, low noise amplifiers (LNA), mixers, filters, up/down converters, etc. Furthermore, OFDMA is used to simultaneously transmit data for multiple users in one data packet by allocating a subset of subcarriers to each user (eg, mobile station 121 or mobile station 124). Data from different users are superimposed in the time domain. In particular, the IEEE802.11ax standard aims to support MIMO-OFDMA.

Also, in some application scenarios, the high throughput of the network is not as important as the greater coverage or reliability of the data link. For example, in directional links or outdoor environments with near-free-space propagation, where distributed antenna structures are employed, and therefore often in channel conditions that are not suitable for MIMO (e.g., poor channel environment), MIMO transmission may be inefficient or completely impractical. row cases, so in these cases only a single data stream is transmitted. This would waste the transmission capacity of M spatially separated transmit antennas.

Thus, while at the receiver, multiple RF receiver chains can still be used to implement a diversity reception scheme (eg, maximum ratio combining subcarrier-by-subcarrier between one subcarrier), is it possible to utilize M RF signal chains to obtain a more efficient communication or reducing interference to other systems are still unsolved issues, resulting in an overall inefficiency of the network system.

FIG. 2 is a schematic flowchart of a method for scheduling a mobile station according to another embodiment of the present invention. The mobile station scheduling method of FIG. 2 is applied to an access device having a distributed antenna structure, eg, an access point (AP). The distributed antenna structure includes multiple antennas that transmit data to multiple mobile stations for the current schedule. The mobile station scheduling method in this embodiment can be applied to a wireless local area network, and can also be applied to a mobile communication network such as 4G (fourth generation) or 5G (fifth generation). The mobile station scheduling method includes:

S210: Determine the transmission signal quality level corresponding to each antenna and each mobile station.

S220: Based on the transmission signal quality level, among the multiple mobile stations, determine a group of mobile stations and their shared antenna sets for current transmission.

S230: Schedule a group of mobile stations to perform downlink data transmission to a group of mobile stations by using a common antenna set.

It should be understood that the shared antenna set is at least one antenna corresponding to the multiple mobile stations (STAs). In other words, the shared antenna set is the intersection between the antenna sets corresponding to each mobile station in the plurality of mobile stations.

It should also be understood that the plurality of mobile stations are the plurality of candidate mobile stations for the current scheduling. The scheduler includes the above-mentioned multiple candidate mobile stations in the current scheduling task in the dynamic scheduling process.

It will also be appreciated that the determination of the transmission signal quality level for each antenna corresponding to each mobile station may be performed periodically. In addition, the transmission signal quality level corresponding to each antenna and each mobile station may be determined from a pre-stored table that is updated periodically based on the above. The table includes transmission signal quality level information corresponding to a plurality of mobile stations (mobile stations in the access network of the access device) with which each antenna interacts with the access device. Wherein, the multiple mobile stations used for the current scheduling are part of the multiple mobile stations interacting with the access device.

It should also be understood that the downlink received signal strength indication information may be a received signal strength indication (Received Signal Strength Indication, RSSI) in a wireless local area network.

It should also be understood that the transmission signal quality level may be multiple levels, for example, multiple levels may be represented by multiple level values. For example, the transmission signal quality level can be divided into 10 levels, and the level value of each level is 1-10 respectively. Among them, 1 represents the lowest level and 10 represents the highest level.

It should also be understood that the evaluation level threshold is a threshold value set for the transmission signal quality level. For example, the evaluation level threshold may be one level value among multiple level values. When the evaluation level threshold is set as the level value, the antenna corresponding to the transmission signal quality level higher than or equal to the evaluation level value is selected as Common antenna set. For example, the evaluation level threshold may be set to 6, and then the antennas corresponding to five levels with a level value of 6-10 are selected as the shared antenna set. If the above-mentioned corresponding antenna is one antenna (for example, in the current environment, only antennas with a level value of 8 exist, and antennas with other level values do not exist), the shared antenna set is the one antenna. For another example, in the current environment, the above-mentioned corresponding antennas are multiple antennas, and the shared antenna set is a group of antennas formed by the multiple antennas.

It should also be understood that the transmission signal quality level may be determined directly or indirectly by each mobile station based on a plurality of received signal strength information collected by its own plurality of radio frequency chains. For example, the transmission signal quality level indicates the proportional relationship between the received signal strength of each antenna's transmission signal at each mobile station and the received signal strength of the plurality of antennas' transmission signals at the mobile station. In one example, the above-mentioned Multiple levels can be set with proportional relationship thresholds. For example, multiple thresholds of proportional relationships may be set for multiple levels, and proportional relationships that meet the corresponding thresholds are divided into corresponding levels. In another example, when the levels of the plurality of antennas determined in the above manner are all below the level indicating poor signal quality, a part of the levels may be set higher than the level indicating poor signal quality. For example, a rank value of 4 indicates poor signal quality, when all antennas (eg, four antennas) have a rank value of 4 or less for a particular mobile station (one or more mobile stations), The level value of at least one of the antennas may be set to 5. In an example, the antenna with the highest rank value among the multiple antennas can be re-adjusted to a rank value of 5, and the rank of the antenna can also be increased to any rank value among 6-10. In another example, among the multiple antennas, the number of antennas that are closest to the half of the number of multiple antennas and not greater than the half number may also be increased. For example, when there are 5 antennas, the level value of less than 2.5 The maximum integer number of antennas is turned up, ie, 2 antennas are turned up.

Since a group of mobile stations and their shared antenna sets are determined based on the transmission signal quality level, the scheduling based on the distributed antenna structure is improved via the shared antenna set on the premise that the data transmission quality of a group of mobile stations is guaranteed by the transmission signal quality level efficiency, thereby improving the overall efficiency of the network system. In other words, in the process of scheduling multiple candidate mobile stations, the embodiment of the present invention selects as many common antennas as possible for a group of multiple candidate mobile stations, thus improving the scheduling efficiency of the mobile stations and improving the overall performance of the network system. effectiveness.

In one example, in the case of multi-user MIMO for transmission, the rank value of the antenna is not used, but only the rank value of the antenna that is not adjusted or initially determined, so that for multiple mobile stations All ensure high data transmission efficiency.

In another example, in the case of single-use MIMO for transmission, an increased antenna rank value is used. Even though the signal quality of the antenna whose level value is increased is poor, it is combined with other antennas for single-use MIMO data transmission, and the data transmission rate is still improved, thereby improving the higher signal quality for the mobile station. Data transfer efficiency.

FIG. 3 is a schematic interaction diagram of a mobile station scheduling method according to another embodiment of the present invention. As shown, mobile station 120 communicates with access device 110 in a network such as a wireless local area network. In step S301, the mobile station 120 sends a message to the access device 110, and the message includes information such as RSSI.

In step S302, the access device 110 performs processing based on the above information to determine a set of shared antennas. Specifically, the access device may determine the respective transmission signal quality levels of the multiple antennas corresponding to the access device based on the above-mentioned information. The access device may then determine the set of common antennas from the plurality of antennas based on the transmission signal quality level.

In step S303, the access device 110 transmits downlink data to the mobile station 120 based on the shared antenna set. Specifically, in one example, the access device may transmit data to the mobile station in a single data stream. In another example, the access device may also transmit data to the mobile station in a single-user MIMO manner. In another example, access device 110 may transmit data to mobile station 120 and other mobile stations in a multi-user MIMO manner.

Furthermore, Table 1 shows an example antenna configuration scheme:

Table 1

	移动站1mobile station 1	移动站2mobile station 2	移动站3mobile station 3	移动站4mobile station 4	............	移动站nmobile station n
天线1Antenna 1	较佳better	较差poor	最佳optimal	最佳optimal	............	较佳better
天线2Antenna 2	最佳optimal	较佳better	较差poor	较佳better	............	较佳better
天线3Antenna 3	较佳better	最佳optimal	较佳better	较差poor	............	最佳optimal
............	............	............	............	............	............	............
天线mAntenna m	较差poor	较差poor	较佳better	较佳better	............	较差poor

As shown in Table 1, there is a correspondence between each of the m antennas and each of the n mobile stations, wherein each correspondence indicates the transmission signal sent by the antenna to the mobile station. Signal quality, which can be assessed by the signal strength of the transmitted signal of this antenna at the receiving part of the mobile station. The signal strength may be the signal strength detected by the multiple radio frequency chains of the receiving part of the mobile station respectively.

In another implementation manner of the present invention, scheduling a group of mobile stations to perform downlink data transmission to a group of mobile stations using a shared antenna set includes: sending the antennas of the shared antenna set to a physical layer control module of the shared antenna set information, so that the physical layer control module sharing the set of antennas can perform downlink data transmission to a group of mobile stations.

Since the antenna information of the shared antenna set is sent to the physical layer control module of the shared antenna set, the physical layer control module of the shared antenna set can use the antenna information of the shared antenna set to realize downlink data transmission when performing physical layer control, which further improves the scheduling efficiency.

In another implementation manner of the present invention, the antenna information of the shared antenna set is sent to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set performs downlink data transmission to a group of mobile stations, including: to the shared antenna set The physical layer control module of the antenna set sends the antenna information of the shared antenna set, so that the physical layer control module of the shared antenna set performs downlink data transmission to a group of mobile stations via the shared antenna set in a multiple-input multiple-output manner.

In another implementation manner of the present invention, the antenna information of the shared antenna set is sent to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set performs downlink data transmission to a group of mobile stations, including: to the shared antenna set The physical layer control module of the antenna set sends antenna information of each antenna in the shared antenna set, so that the physical layer control module of the shared antenna set performs downlink data transmission to each of a group of mobile stations via each antenna in a single data stream transmission manner.

In another implementation manner of the present invention, based on the transmission signal quality level, among a plurality of mobile stations, determining a group of mobile stations and their shared antenna sets for current transmission includes: comparing the transmission signal quality level with a preset The evaluation level threshold, among multiple mobile stations, determines a group of mobile stations used for current transmission and their shared antenna set, wherein the transmission signal quality level corresponding to the shared antenna set is higher than or equal to the evaluation level threshold.

In another implementation manner of the present invention, the transmission signal quality level includes multiple levels, among the multiple levels, a first level is higher than a second level, and the transmission signal quality of the first level is higher than the second level the transmission signal quality of The second level corresponds to the second number of mobile stations determined according to the transmission signal quality, and the method further includes: if the first number of mobile stations is less than the second number of mobile stations, and the second level is higher than the lowest level among the plurality of levels, then The second level is determined as the evaluation level threshold.

Since the second level is determined as the evaluation level threshold, and the second level is higher than the minimum level, the data transmission quality corresponding to the second level is guaranteed. In addition, since the number of second mobile stations corresponding to the second level is scheduled mobile stations, thus further improving the scheduling efficiency.

In another implementation of the present invention, the method further includes: if the first number of mobile stations is equal to the second number of mobile stations, determining the first level as the evaluation level threshold.

In another implementation manner of the present invention, the method further includes: if the number of the first mobile stations is less than the number of the second mobile stations, and the second level is the lowest level among the plurality of levels, determining the first level as the evaluation level threshold .

In another implementation manner of the present invention, the method further includes: receiving downlink received signal strength indication information sent by each mobile station, wherein determining the transmission signal quality level corresponding to each antenna and each mobile station includes: based on each mobile station The downlink received signal strength indication information sent by each mobile station, and the signal strength ratio information of each antenna among multiple antennas, determine the transmission signal quality level corresponding to each antenna and each mobile station.

Since the downlink received signal strength indication information is used to evaluate the downlink received signal quality, the received signal quality has a high reference value for the transmission quality. Therefore, the transmission signal quality level is determined based on the downlink received signal strength indication information, which improves the transmission signal quality. The accuracy of the level, in addition, can also improve the backward compatibility with the existing technology. In addition, using the signal strength ratio information of each antenna in multiple antennas can improve the data processing efficiency on the premise of having a higher reference value of transmission quality.

In another implementation manner of the present invention, the downlink received signal strength indication information sent by each mobile station is a plurality of received signal strength information collected by each mobile station based on its own multiple radio frequency chains; or, each mobile station sends The downlink received signal strength indication information is joint signal strength information sent by each mobile station, wherein the joint strength signal information is obtained by combining multiple pieces of received signal strength information.

Since the received signal strength information collected by each mobile station based on its own multiple radio frequency chains can reflect the signal reception situation of each radio frequency chain, the downlink received signal strength indication information has greater reference value. In addition, the joint strength signal information is obtained by combining multiple pieces of received signal strength information, thus reducing the amount of information processing and improving the information processing efficiency while ensuring the reference value of the indication information.

FIG. 4 is a schematic block diagram of an access device according to another embodiment of the present invention. As shown in the figure, the access device includes an antenna evaluation module 410 , a scheduler 420 and a physical layer control module 430 . The scheduler 420 can be used for the control of the medium access control (Medium Access Control, MAC) layer. The physical layer control module 430 is controlled by the scheduler 420 to perform control such as time-frequency resource allocation. Accordingly, the access device can The precoding matrix of the shared antenna set is pre-stored, and the physical layer control module 430 can map the data to be transmitted into the physical layer based on the precoding matrix to implement MIMO transmission.

Antenna evaluation module 410 can determine an antenna based on its contribution to all capacities or all signal strengths.

According to the evaluation results of the antenna evaluation module 410, the access device maintains a table, such as several antenna sets in the table of Table 1 or Table 2. The TX antennas can be listed as "best antenna set", "better antenna set" and "poor antenna set", in other words, in the form of three antenna sets. Since it is difficult to measure an absolutely accurate received signal strength, the antennas are ranked using relative signal strength rather than absolute value.

The best set of antennas refers to the antennas available to achieve the highest signal strength P_h at the receiver.

A poor antenna set means that when used as a common antenna set, the received signal strength is ΔPdB weaker than the highest signal strength P_h. ΔP can be predefined according to practical application requirements, for example, ΔP=10dB. In other words, a poor set of shared antennas contributes little to the total received signal.

A preferred set of antennas refers to antennas with signal strengths between P_h and (P_h-ΔP) at the receiver when used as a shared antenna set.

For downlink transmissions to only one mobile station, scheduler 420 first determines one antenna (for a single data stream or higher RSSI) or multiple antennas (for a MIMO or higher RSSI). As an example, if the best antennas are insufficient, more antennas can be found from the best antennas.

For multi-user OFDMA downlink transmission, the following strategies can be adopted for the determination of mobile stations and antennas in the scheduling process. The scheduler 420 can determine the mobile station with the common best antenna (best set of antennas). If there are not enough best antennas, more available antennas can be determined from the best and best antenna sets for these mobile stations.

Furthermore, unlike the operation of the conventional scheduler, the scheduler 420 in the present invention determines the antenna used in the current transmission, and outputs the antenna determination result to the physical layer.

In addition, Table 2 shows another example antenna configuration scheme, in which four mobile stations and five antennas are used as an example, and the corresponding transmission between each antenna and each mobile station is shown in Table 2 Signal quality level, in this example, the transmission signal quality level can be divided into best antenna, better antenna and poor antenna:

Table 2

	移动站1mobile station 1	移动站2mobile station 2	移动站3mobile station 3	移动站4mobile station 4
最佳天线best antenna	{2}{2}	{2}{2}	{4}{4}	{5}{5}
较佳天线best antenna	{3,5}{3,5}	{1,4}{1,4}	{1,2,5}{1,2,5}	{3}{3}
较差天线bad antenna	{1,4}{1,4}	{3,5}{3,5}	{3}{3}	{1,2,4}{1,2,4}

Hereinafter, multiple examples of the mobile station scheduling methods shown in FIG. 5A to FIG. 5C will be described by taking Table 2 as an example. The wireless communication system shown in FIGS. 5A to 5C includes an access device 510 and four mobile stations 521 , mobile station 522 , mobile station 523 and mobile station 534 . The access device 510 includes a distributed antenna structure, and the distributed antenna structure includes an antenna 511 , an antenna 512 , an antenna 513 , an antenna 514 and an antenna 515 . The access device 510 may be an access device of a wireless local area network, or an access device of a mobile communication network. Each of the above-described antennas 511-515 can transmit antenna signals to each mobile station. FIG. 5A is a schematic diagram of an example of a mobile station scheduling method according to another embodiment of the present invention. As shown, in this example, mobile station 2 and mobile station 3 in Table 2 are described. In Table 2, the antennas of the mobile station 2 and the mobile station 3 corresponding to the optimal antennas are the antenna 2 and the antenna 4, respectively, that is, the same optimal antenna does not exist. Next, corresponding to the preferred antenna whose transmission signal quality level is lower than the best antenna, the antennas corresponding to mobile station 2 and mobile station 3 are the combination of antennas 1 and 4 and the combination of antennas 1, 2 and 5, respectively. The transmission signal quality level of the preferred antenna determines that mobile station 2 and mobile station 3 have antenna 1 in common. Preferably, the common antennas 1, 2 and 4 may also be determined based on the optimal antenna and the optimal antenna, so as to determine as many antennas as possible to improve the data transmission efficiency. As shown in the figure, a set of antennas composed of antenna 514, antenna 512, and antenna 511 (an example of a shared antenna set) is composed of mobile station 522 (corresponding to mobile station 2) and mobile station 523 (corresponding to mobile station 3). Multiple-user MIMO communication is performed between a group of mobile stations (an example of a group of mobile stations). It should be understood that the above example is only an example based on Table 2. In other examples, other communication strategies can also be used. For example, any two of the antenna 514, the antenna 512 and the antenna 511 can communicate with the mobile station 522 and the mobile Multi-user MIMO communication is performed between the stations 523, and the remaining antennas among the

antennas

514, 512, and 511 are not determined. As another example, any two of antenna 514, antenna 512, and antenna 511 may perform single-user MIMO with one of mobile station 522 and mobile station 523, and the remaining antennas of antenna 514, antenna 512, and antenna 511 are A single data stream transmission is performed between the mobile station 522 and the other of the mobile stations 523 .

FIG. 5B is a schematic diagram of another example of a mobile station scheduling method according to another embodiment of the present invention. As shown, in this example, mobile station 1 and mobile station 2 in Table 2 are described. In Table 2, the antenna corresponding to the best antenna of the mobile station 1 and the mobile station 2 is the antenna 2, that is, the mobile station 1 and the mobile station 2 have a common antenna 2. Next, the antennas corresponding to mobile station 1 and mobile station 2 are the combination of antennas 3 and 5 and the combination of antennas 1 and 4, respectively, corresponding to the preferred antennas that are lower than the optimal antennas. In addition, in one example, it can be determined whether there is a common antenna among the inferior antennas lower than the better antenna, and if so, it is selected together with the antenna 2 among the best antennas (determine as many antennas as possible, To improve data transmission efficiency), if it does not exist, only antenna 2 is selected. In another example, it is not determined whether there is a common antenna among the inferior antennas, in other words, regardless of whether there is a common antenna, the inferior antenna is not selected. As shown, antenna 512 (an example of a common set of antennas) and a group of mobile stations (an example of a group of mobile stations) consisting of mobile station 521 (corresponding to mobile station 1) and mobile station 522 (corresponding to mobile station 2) Single-stream communication is performed between them. Corresponding to Table 2, the best antenna for the mobile station 521 and the mobile station 522 is the antenna 512, because there is no antenna corresponding to the above-mentioned group of mobile stations (corresponding to one of the best antennas) There may be a better antenna, but there is no better antenna for the above two. In other words, the intersection between the respective better antennas of the two is zero).

FIG. 5C is a schematic diagram of another example of a mobile station scheduling method according to another embodiment of the present invention. As shown, in this example, mobile station 2 and mobile station 4 in Table 2 are described. In Table 2, the antennas of the mobile station 2 and the mobile station 4 corresponding to the best antennas are the antenna 2 and the antenna 5, respectively, that is, there is no common antenna 2. Next, the antennas corresponding to mobile station 2 and mobile station 4 are the combination of antennas 1 and 4 and antenna 3, respectively, corresponding to the preferred antennas lower than the optimal antennas, and there is still no common antenna. In one example, it can be judged whether there is a common antenna among the inferior antennas that are lower than the better antennas, and if so, it is selected (determine as many antennas as possible to improve data transmission efficiency), if not , a single data stream transmission is used for the mobile station. In another example, it is not judged whether there is a common antenna among the inferior antennas, in other words, regardless of whether there is a common antenna, the above determination operation is not performed on the inferior antenna, and the mobile station is directly used for single data stream transmission. As shown, a set of antennas consisting of antenna 514, antenna 512, and antenna 511 (an example of a shared antenna set) is in single-user MIMO communication with mobile station 522 (corresponding to mobile station 2). In addition, a set of antennas composed of antennas 513 and 515 (an example of a shared antenna set) performs single-user MIMO communication with mobile station 524 (corresponding to mobile station 4).

FIG. 6 is a schematic block diagram of an access device according to another embodiment of the present invention. The access device of FIG. 6 has a distributed antenna structure. The distributed antenna structure includes multiple antennas that transmit data to multiple mobile stations for the current schedule. The access device includes:

The first determination module 610 determines the transmission signal quality level corresponding to each antenna and each mobile station.

The second determination module 620 determines, among the plurality of mobile stations, a group of mobile stations and a set of shared antennas thereof for current transmission based on the transmission signal quality level.

The scheduling module 630 is configured to schedule the group of mobile stations to perform downlink data transmission to the group of mobile stations by using the shared antenna set.

Since a group of mobile stations and their shared antenna sets are determined based on the transmission signal quality level, the scheduling efficiency based on the distributed antenna structure is improved through the shared antenna set on the premise that the transmission quality of a group of mobile stations is guaranteed by the transmission signal quality level , thereby improving the overall efficiency of the network system.

In another implementation manner of the present invention, the scheduling module is specifically configured to: send the antenna information of the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set performs downlink data to a group of mobile stations transmission.

In another implementation manner of the present invention, the scheduling module is specifically configured to: send the antenna information of the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set moves to a group via the shared antenna set The station performs downlink data transmission in a multiple-input multiple-output manner.

In another implementation manner of the present invention, the scheduling module is specifically configured to: send the antenna information of each antenna in the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set uses each antenna to The single data stream transmission mode performs downlink data transmission to each of a group of mobile stations.

Since the physical layer control module can still perform downlink data transmission to each of a group of mobile stations in a single data stream transmission mode via each antenna when performing physical layer control, the flexibility of scheduling is improved.

In another implementation manner of the present invention, the second determining module is specifically configured to: compare the transmission signal quality level with a preset evaluation level threshold, and determine, among the multiple mobile stations, a group of mobile stations used for current transmission and their A shared antenna set, wherein the transmission signal quality level corresponding to the shared antenna set is higher than or equal to the evaluation level threshold.

In another implementation manner of the present invention, the transmission signal quality level includes multiple levels, among the multiple levels, a first level is higher than a second level, and the transmission signal quality of the first level is higher than the second level the transmission signal quality of When the second level corresponds to the second number of mobile stations determined according to the quality of the transmission signal, the device further includes: a threshold determination module, configured to: if the number of the first mobile stations is less than the number of the second mobile stations, and the second level is higher than a plurality of The lowest level among the levels, the second level is determined as the evaluation level threshold.

In another implementation manner of the present invention, the threshold determination module is further configured to determine the first level as the evaluation level threshold if the number of the first mobile stations is equal to the number of the second mobile stations.

In another implementation manner of the present invention, the threshold determination module is further configured to: if the number of the first mobile stations is less than the number of the second mobile stations, and the second level is the lowest level among the multiple levels, then determine the first level as the Evaluation level threshold.

In another implementation manner of the present invention, the device further includes: a receiving module for receiving downlink received signal strength indication information sent by each mobile station, wherein the first determining module is specifically configured to: based on the downlink receiving signal sent by each mobile station The signal strength indication information and the signal strength ratio information of each antenna among the multiple antennas determine the transmission signal quality level corresponding to each antenna and each mobile station.

FIG. 7 is a schematic block diagram of an electronic device according to another embodiment of the present invention. The electronic device of FIG. 7 has a distributed antenna structure, for example, the electronic device may be an access point (AP). The distributed antenna structure includes multiple antennas that transmit data to multiple mobile stations for the current schedule. The electronic device includes: one or more processors 710, a communication interface 720, a memory 730 and a communication bus 740, and one or more programs, wherein the one or more processors 710, the communication interface 720, and the memory 730 pass through the communication bus 740 completes the mutual communication, one or more programs are stored in the memory 730, and are configured to be executed by the one or more processors 710: determine the transmission signal quality level corresponding to each antenna and each mobile station; based on The transmission signal quality level, among the plurality of mobile stations, determines a group of mobile stations and a set of shared antennas for the current transmission; the group of mobile stations is scheduled to use the set of shared antennas The group of mobile stations performs downlink data transmission.

In another implementation manner of the present invention, the one or more processors 710 are specifically configured to perform: sending the antenna information of the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set sends a message to a physical layer control module of the shared antenna set. A group of mobile stations perform downlink data transmission.

In another implementation manner of the present invention, the one or more processors 710 are specifically configured to perform: sending the antenna information of the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set can pass the shared antenna set to the physical layer control module of the shared antenna set. The antenna set performs downlink data transmission to a group of mobile stations in a multiple-input multiple-output manner.

In another implementation manner of the present invention, the one or more processors 710 are specifically configured to perform: sending the antenna information of each antenna in the shared antenna set to the physical layer control module of the shared antenna set, so as to share the physical layer of the shared antenna set The control module performs downlink data transmission to each of a group of mobile stations via each antenna in a single data stream transmission manner.

In another implementation manner of the present invention, the one or more processors 710 are specifically configured to perform: comparing the transmission signal quality level with a preset evaluation level threshold, and determining a group of mobile stations for current transmission among multiple mobile stations The mobile station and its shared antenna set, wherein the transmission signal quality level corresponding to the shared antenna set is higher than or equal to the evaluation level threshold.

In another implementation manner of the present invention, the transmission signal quality level includes multiple levels, among the multiple levels, a first level is higher than a second level, and the transmission signal quality of the first level is higher than the second level the transmission signal quality of When the second level corresponds to the second number of mobile stations determined according to the transmission signal quality, the one or more processors 710 are further configured to perform: if the first number of mobile stations is less than the second number of mobile stations, and the second level is higher than the number of mobile stations The lowest level among the two levels, the second level is determined as the evaluation level threshold.

In another implementation of the present invention, the one or more processors 710 are further configured to perform: if the first number of mobile stations is equal to the second number of mobile stations, determining the first level as the evaluation level threshold.

In another implementation of the present invention, the one or more processors 710 are further configured to perform: if the number of the first mobile stations is less than the number of the second mobile stations, and the second level is the lowest level among the multiple levels, then The first level is determined as the evaluation level threshold.

In another implementation manner of the present invention, one or more processors 710 are further configured to perform: receiving downlink received signal strength indication information sent by each mobile station, wherein the transmission corresponding to each antenna and each mobile station is determined The signal quality level includes: determining the transmission signal quality level corresponding to each antenna and each mobile station based on the downlink received signal strength indication information sent by each mobile station and the signal strength ratio information of each antenna among multiple antennas .

It should be understood that each solution in this embodiment has the corresponding technical effect in the foregoing method embodiment, and details are not repeated here.

An embodiment of the present invention further provides a storage medium, where the storage medium includes a stored program, wherein when the program runs, a device including the storage medium is controlled to execute the method described in the embodiment of FIG. 2 . It should be understood that each solution in this embodiment has the corresponding technical effect in the foregoing method embodiment, and details are not repeated here.

Embodiments of the present invention also provide a computer program product tangibly stored on a computer-readable medium and comprising computer-readable instructions that, when executed, cause at least one processor to A method such as that described in the embodiment of FIG. 2 is performed. It should be understood that each solution in this embodiment has the corresponding technical effect in the foregoing method embodiment, and details are not repeated here.

It should be noted that the computer storage medium of the present invention may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer readable medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples of computer readable storage media may include, but are not limited to, electrical connections with one or more wires, portable computer disks, hard disks, random access storage media (RAM), read only storage media (ROM), erasable storage media programmable read-only storage media (EPROM or flash memory), optical fiber, portable compact disk read-only storage media (CD-ROM), optical storage media devices, magnetic storage media devices, or any suitable combination of the foregoing. In the present invention, a computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present invention, however, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code therein. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program configured for use by or in connection with an instruction execution system, apparatus, or device . Program code embodied on a computer readable medium may be transmitted using any suitable medium including, but not limited to, wireless, antenna, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

It should be understood that although the present invention is described according to various embodiments, not each embodiment only includes an independent technical solution, and this description in the description is only for the sake of clarity, and those skilled in the art should take the description as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

The above are only illustrative specific implementations of the embodiments of the present invention, and are not intended to limit the scope of the embodiments of the present invention. Any equivalent changes, modifications and combinations made by any person skilled in the art without departing from the concept and principles of the embodiments of the present invention shall fall within the protection scope of the embodiments of the present invention.

Claims

A mobile station scheduling method, applied to an access device having a distributed antenna structure, the distributed antenna structure comprising a plurality of antennas for transmitting data to a plurality of mobile stations for current scheduling, the method comprising:

Determine the transmission signal quality level corresponding to each antenna and each mobile station (S210);

Based on the transmission signal quality level, among the plurality of mobile stations, determine a group of mobile stations for current transmission and a set of shared antennas thereof (S220);

The group of mobile stations is scheduled to perform downlink data transmission to the group of mobile stations using the common antenna set (S230).
The method of claim 1, wherein the scheduling the group of mobile stations to utilize the common antenna set for downlink data transmission to the group of mobile stations comprises:

The antenna information of the shared antenna set is sent to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set performs downlink data transmission to the group of mobile stations.
2. The method of claim 2, wherein the sending the antenna information of the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set sends the information to the group The mobile station performs downlink data transmission, including:

sending the antenna information of the shared antenna set to the physical layer control module of the shared antenna set so that the physical layer control module of the shared antenna set transmits the multiple-input multiple-output to the set of mobile stations via the shared antenna set way for downlink data transmission.
2. The method of claim 2, wherein the sending the antenna information of the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set sends the information to the group The mobile station performs downlink data transmission, including:

Sending antenna information of each antenna in the shared antenna set to the physical layer control module of the shared antenna set, so that the physical layer control module of the shared antenna set transmits a single data stream to the shared antenna set via the respective antennas. Each of a group of mobile stations performs downlink data transmission.
The method of claim 1, wherein the determining, among the plurality of mobile stations based on the transmission signal quality level, a group of mobile stations and a set of shared antennas thereof for current transmission comprises:

Comparing the transmission signal quality level with a preset evaluation level threshold, among the multiple mobile stations, determine a group of mobile stations and their shared antenna sets for current transmission, wherein the transmission corresponding to the shared antenna set The signal quality level is higher than or equal to the evaluation level threshold.
6. The method of claim 5, wherein the transmission signal quality level includes a plurality of levels, wherein a first level is higher than a second level, and the transmission signal quality of the first level is higher than the transmission signal quality of the second level,

Wherein, the shared antenna set corresponds to the first number of mobile stations determined according to the transmission signal quality when the transmission signal quality level is higher than or equal to the first level, and the shared antenna set is higher than or equal to the first mobile station number when the transmission signal quality level is higher than or equal to the first level. The second level corresponds to the number of second mobile stations determined according to the quality of the transmission signal,

The method also includes:

If the first number of mobile stations is less than the second number of mobile stations, and the second level is higher than the lowest level among the plurality of levels, the second level is determined as the evaluation level threshold.
The method of claim 6, wherein the method further comprises:

If the first number of mobile stations is equal to the second number of mobile stations, the first level is determined as the evaluation level threshold.
The method of claim 6, wherein the method further comprises:

If the first number of mobile stations is less than the second number of mobile stations, and the second level is the lowest level among the plurality of levels, the first level is determined as the evaluation level threshold.
The method of claim 1, wherein the method further comprises:

Receive downlink received signal strength indication information sent by each mobile station, wherein the determining the transmission signal quality level corresponding to each antenna and each mobile station includes:

Based on the downlink received signal strength indication information sent by each mobile station and the signal strength ratio information of each antenna among the plurality of antennas, a transmission signal quality level corresponding to each antenna and each mobile station is determined.
The method according to claim 9, wherein the downlink received signal strength indication information sent by each mobile station is a plurality of received signal strength information collected by each mobile station based on its own multiple radio frequency chains;

Or, the downlink received signal strength indication information sent by each mobile station is joint signal strength information sent by each mobile station, wherein the joint signal strength information is obtained by combining the plurality of received signal strength information processed.
An access device having a distributed antenna structure including a plurality of antennas for transmitting data to a plurality of mobile stations for current scheduling, the access device comprising:

a first determining module (610), for determining a transmission signal quality level corresponding to each antenna and each mobile station;

A second determining module (620), based on the transmission signal quality level, among the plurality of mobile stations, determines a group of mobile stations and a set of shared antennas used for current transmission;

A scheduling module (630) for scheduling the group of mobile stations to perform downlink data transmission to the group of mobile stations by using the common antenna set.
An electronic device comprising:

one or more processors (710), a communication interface (720), a memory (730) and a communication bus (740), and one or more programs, wherein the one or more processors (710), the The communication interface (720), the memory (730) communicate with each other through the communication bus (740), and the one or more programs are stored in the memory (730) and configured to be The one or more processors (710) perform: the method of any one of claims 1-10.
A storage medium comprising a stored program, wherein when the program runs, a device including the storage medium is controlled to execute the method according to any one of claims 1 to 10.
A computer program product tangibly stored on a computer readable medium and comprising computer readable instructions which, when executed, cause at least one processor to perform the execution according to claims 1 to 10 The method of any of the above.