CN106507489B - resource allocation method and access device - Google Patents
resource allocation method and access device Download PDFInfo
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- CN106507489B CN106507489B CN201611265206.2A CN201611265206A CN106507489B CN 106507489 B CN106507489 B CN 106507489B CN 201611265206 A CN201611265206 A CN 201611265206A CN 106507489 B CN106507489 B CN 106507489B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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Abstract
The embodiment of the invention discloses a resource allocation method and access equipment, wherein the method comprises the following steps: the access equipment determines a target activation set and a transmitting terminal; the target activation set comprises at least two receiving ends, and the receiving ends are receiving equipment for receiving the data transmitted by the transmitting ends; the access equipment acquires the link state of the receiving end; and the access equipment selects a receiving end with a better link state from the active set as a target receiving end and allocates resources for the target receiving end. The access device can determine the link condition between the receiving end and the transmitting end by obtaining the link state of the receiving end, thereby determining the target receiving end and distributing resources for the target receiving end, thus avoiding the problem that the resource distribution scheme of FIFO and random selection of the receiving end can not effectively utilize the system resources, improving the PRR of the receiving end and improving the system performance.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a resource allocation method and an access device.
background
In recent years, Long Term Evolution (LTE) based Vehicle-to-outside communication (V2X), namely: LTE-V2X has become a research hotspot in the Third generation partnership Project (3 GPP), where the core research hotspot contains Vehicle-to-Vehicle communication (V2V) related technologies. With the continuous innovation and application of the V2V technology, the demand of the wireless communication system for spectrum resources is also increasing, so that the wireless resources are in a tight trend.
the 3GPP Release (Release)14 standard researches a scheduling method and a resource allocation scheme in a vehicle-to-vehicle direct communication V2V service, and a scene diagram thereof is shown in fig. 1 as follows:
The coverage area of an Universal Radio Access Network (E-UTRAN) comprises a plurality of vehicles, wherein one part of the vehicles can be used as a receiving end, and the other part of the vehicles can be used as a transmitting end; in fig. 1, the left vehicle is the transmitting end and the right vehicle is the receiving end. The receiving end and the transmitting end may adopt a scheme of direct communication (D2D) SL transmission.
the current resource allocation scheme mainly includes two types: one is First In First Out (FIFO), and the other is random selection of the receiver. The resource allocation scheme of the FIFO refers to: and selecting the receiving ends in the queue of the receiving ends of each transmitting end according to the time sequence of the arrival queue, wherein the receiving end which arrives at the queue firstly has the highest priority. The resource allocation scheme for randomly selecting the receiving ends refers to randomly selecting one receiving end in a queue of the receiving ends of each transmitting end, wherein the probability of each receiving end in the queue being selected is the same.
the resource allocation schemes of the FIFO and the random selection receiving end are simple to implement, and the system complexity is relatively low, but considering the situation that the radio resources are relatively tight, the system resources cannot be fully and effectively utilized, which may result in a low data Reception success rate (PRR) of the receiving end, and thus a low system performance.
Disclosure of Invention
The embodiment of the invention provides a resource allocation method and access equipment, which are used for improving the PRR of a receiving end so as to improve the system performance.
in one aspect, an embodiment of the present invention provides a resource allocation method, including:
The access equipment determines a target activation set and a transmitting terminal; the target activation set comprises at least two receiving ends, and the receiving ends are receiving equipment for receiving the data transmitted by the transmitting ends;
the access equipment acquires the link state of the receiving end;
and the access equipment selects a receiving end with a better link state from the active set as a target receiving end and allocates resources for the target receiving end.
In an optional implementation manner, the acquiring, by the access device, the link state of the receiving end includes:
The access equipment receives a Channel Quality Indicator (CQI) sent by a receiving end in the target active set;
the access device selects a receiving end with a better link state from the active set as a target receiving end, and the resource allocation for the target receiving end comprises the following steps:
Determining the priority of the receiving end according to the CQI, wherein the better the CQI is, the higher the priority of the receiving end corresponding to the CQI is;
And selecting a receiving end with higher priority in the target active set as a target receiving end, and allocating resources for the target receiving end.
In an optional implementation manner, the determining the priority of the receiving end according to the CQI, where the better the CQI is, the higher the priority of the receiving end corresponding to the CQI is, includes:
Determining the maximum data volume which can be currently transmitted by the receiving end according to the CQI;
And determining the priority of the receiving end according to the maximum data volume, wherein the larger the maximum data volume is, the higher the priority of the receiving end corresponding to the maximum data volume is.
In an optional implementation manner, the determining, by the access device, the target active set includes:
receiving a transmitting terminal of the receiving device reported by the receiving device, and determining all receiving devices corresponding to the transmitting terminal as a target active set of the transmitting terminal; and the transmitting end of the receiving equipment reported by the receiving equipment is the transmitting end corresponding to the minimum path loss of the receiving equipment.
in an optional implementation manner, after the determining that all receiving devices corresponding to the transmitting end are used as the target active set of the transmitting end, the method further includes:
And deleting the receiving equipment which is positioned outside the effective communication range of the transmitting end in the target active set.
In an optional implementation manner, the allocating resources to the target receiving end includes:
and determining a modulation and coding strategy and a transmission block size according to the CQI.
in another aspect, an embodiment of the present invention further provides an access device, including:
The information confirmation unit is used for determining a target active set and a transmitting terminal; the target activation set comprises at least two receiving ends, and the receiving ends are receiving equipment for receiving the data transmitted by the transmitting ends;
a state obtaining unit, configured to obtain, by the access device, a link state of the receiving end;
And the resource allocation unit is used for selecting a receiving end with a better link state from the active set as a target receiving end and allocating resources for the target receiving end.
In an optional implementation manner, the state obtaining unit is configured to receive a channel quality indicator CQI sent by a receiving end in the target active set;
The resource allocation unit is used for determining the priority of the receiving end according to the CQI, wherein the CQI is better and the priority of the receiving end corresponding to the CQI is higher; and selecting a receiving end with higher priority in the target active set as a target receiving end, and allocating resources for the target receiving end.
In an optional implementation manner, the resource allocation unit is configured to determine, according to the CQI, a maximum data amount that can be currently transmitted by the receiving end; and determining the priority of the receiving end according to the maximum data volume, wherein the larger the maximum data volume is, the higher the priority of the receiving end corresponding to the maximum data volume is.
In an optional implementation manner, the information confirmation unit is configured to receive a transmitting end of the receiving device reported by the receiving device, and determine that all receiving devices corresponding to the transmitting end are used as a target active set of the transmitting end; and the transmitting end of the receiving equipment reported by the receiving equipment is the transmitting end corresponding to the minimum path loss of the receiving equipment.
in an optional implementation manner, the access device further includes:
and the information adjusting unit is used for deleting the receiving equipment which is positioned outside the effective communication range of the transmitting terminal in the target active set after all the receiving equipment corresponding to the transmitting terminal is determined to be used as the target active set of the transmitting terminal.
In an optional implementation manner, the resource allocation unit is configured to determine a modulation and coding strategy and a transport block size according to the CQI.
Embodiments of the present invention in three aspects further provide an access device, including: a processor, an input output device, and a memory; an executable program is stored in the memory; the processor implements the method flow of any one of the previous aspects by executing the executable program.
according to the technical scheme, the embodiment of the invention has the following advantages: the access device can determine the link condition between the receiving end and the transmitting end by obtaining the link state of the receiving end, thereby determining the target receiving end and distributing resources for the target receiving end, thus avoiding the problem that the resource distribution scheme of FIFO and random selection of the receiving end can not effectively utilize the system resources, improving the PRR of the receiving end and improving the system performance.
Drawings
FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method according to an embodiment of the present invention;
FIG. 4 is a system diagram according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of system level simulation according to an embodiment of the present invention;
Fig. 6 is a schematic structural diagram of an access device according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an access device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an access device according to an embodiment of the present invention.
Detailed Description
in one aspect, an embodiment of the present invention provides a resource allocation method, as shown in fig. 2, including:
201: the access equipment determines a target activation set and a transmitting terminal; the target activation set comprises at least two receiving ends, and the receiving ends are receiving equipment for receiving the data transmitted by the transmitting ends;
The access device may generally be a network device deployed in an access network and responsible for allocating communication resources for a transmitting end or a receiving end, such as a base station (E-UTRAN Node B, eNB) in the E-UTRAN in fig. 1, and may also be, for example: an arbitrary Access device including a wireless Access Point (AP). The embodiments of the present invention are not limited to the embodiments.
the transmitting end and the receiving end are a relative concept, in the process of one-time data transmission, the source end of the data is the transmitting end, and correspondingly, the destination end of the data is the receiving end; one transmitting end may have a plurality of receiving ends, and in the system configuration shown in fig. 1, there are 1 transmitting end and 3 receiving ends.
202: the access equipment acquires the link state of the receiving end;
in this embodiment, the link state of the receiving end refers to the quality of the link between the receiving end and the transmitting end, and any parameter that reflects the quality of the link may be adopted.
203: and the access equipment selects a receiving end with a better link state from the active set as a target receiving end and allocates resources for the target receiving end.
The access device can determine the link condition between the receiving end and the transmitting end by obtaining the link state of the receiving end, thereby determining the target receiving end and distributing resources for the target receiving end, thus avoiding the problem that the resource distribution scheme of FIFO and random selection of the receiving end can not effectively utilize the system resources, improving the PRR of the receiving end and improving the system performance.
in an optional implementation manner, the embodiment of the present invention further provides an implementation scheme for specifically determining a link state, which is as follows: the access device acquiring the link state of the receiving end comprises:
The access device receives a Channel Quality Indicator (CQI) sent by a receiving end in the target active set;
the access device selects a receiving end with a better link state from the active set as a target receiving end, and the resource allocation for the target receiving end comprises the following steps:
determining the priority of the receiving end according to the CQI, wherein the better the CQI is, the higher the priority of the receiving end corresponding to the CQI is;
And selecting a receiving end with higher priority in the target active set as a target receiving end, and allocating resources for the target receiving end.
In this embodiment, the link status between the receiving end and the transmitting end can be known in detail through the CQI reported by the receiving end, and it can be understood that: if the receiving ends in the target active set all send the CQI, the priority of each receiving end can be obtained, and the receiving ends which do not send the CQI can be disregarded, and indication information can be sent to the receiving ends to indicate the receiving ends to feed back the CQI.
In an optional implementation manner, an implementation scheme for determining the priority by the CQI is further provided in the embodiments of the present invention, and the implementation scheme is as follows: the determining the priority of the receiving end according to the CQI, wherein the better the CQI is, the higher the priority of the receiving end corresponding to the CQI is, comprises:
Determining the maximum data volume which can be currently transmitted by the receiving end according to the CQI;
And determining the priority of the receiving end according to the maximum data volume, wherein the larger the maximum data volume is, the higher the priority of the receiving end corresponding to the maximum data volume is.
In this embodiment, the maximum data amount that the receiving end can transmit is determined by the CQI, and it can be understood that the better the link status is, the larger the maximum data amount that can be transmitted is, and the receiving end obtains a higher priority.
In an optional implementation manner, an embodiment of the present invention further provides a determination scheme for an active set, which is specifically as follows: the access device determining the target active set comprises:
Receiving a transmitting terminal of the receiving device reported by the receiving device, and determining all receiving devices corresponding to the transmitting terminal as a target active set of the transmitting terminal; and the transmitting end of the receiving equipment reported by the receiving equipment is the transmitting end corresponding to the minimum path loss of the receiving equipment.
In this embodiment, each terminal device may use itself as a receiving end to report the state of a communication link between itself and a surrounding terminal device, so that the access device will obtain a transmitting end as a source end of data and can serve as all terminal devices of the corresponding receiving end. In addition, in this embodiment, the transmitting end that is reported by the terminal device is required to have the minimum path loss, so that the problem caused by reporting too many interference items can be reduced.
in an alternative implementation manner, in the car networking system, the receiving end and the transmitting end are both cars, and for cars far away from each other, the mutual influence is less, and the effective communication range of the car should be limited, and based on this embodiment of the present invention, an implementation scheme for modifying the active set is further provided, specifically as follows: after the determining that all receiving devices corresponding to the transmitting end are used as the target active set of the transmitting end, the method further includes:
And deleting the receiving equipment which is positioned outside the effective communication range of the transmitting end in the target active set.
in this embodiment, the effective communication range may be a set relative distance between the transmitting end and the receiving end.
In an optional implementation manner, since the access device already obtains the CQI, the embodiment of the present invention further provides an implementation scheme for performing resource allocation based on the CQI, which is as follows: the allocating resources to the target receiving end comprises:
And determining a modulation and coding strategy and a transmission block size according to the CQI.
the present invention provides a method and apparatus, including but not limited to: a base station and a terminal supporting V2X service, wherein the base station schedules transmission of V2X service data based on Channel Quality Indicator (CQI) feedback of the terminal, and the base station performs scheduling by using the following algorithm, as shown in the flowchart 3:
301: aiming at equipment (namely a transmitting end) with a transmitting requirement, determining an active set of the equipment, and putting all receiving ends in the active set into a queue;
the receiving end may be a vehicle in this embodiment, and the vehicle belongs to the mobile end, so the receiving end may be referred to as the mobile end in this embodiment.
302: traversing the CQI information of the receiving end in the active set;
303: calculating the maximum Data volume (Data) which can be transmitted under the current state of each receiving end according to the CQI information of each receiving end;
304: determining the priority of each receiving end according to the size of the maximum data volume, wherein the priority is higher when the maximum data volume is larger;
305: allocating resources for the receiving end according to the priority of the receiving end, and constructing scheduling information;
306: finishing data transmission according to the scheduling information, calculating a Signal to Interference plus Noise Ratio (SINR), checking a link and a curve by taking the coding card as a unit, and judging fast alignment error; then, judging whether the packet is wrong, and feeding back Acknowledgement (ACK) or non-acknowledgement (NACK) information to a transmitting end;
307: and counting the PRR result according to the fed back ACK or NACK information.
The foregoing embodiments will be illustrated in several respects:
in this embodiment, the active set of the transmitting end refers to a receiving User Equipment (UE) group corresponding to each UE, and a determination method of the active set is given as follows:
each receiving UE traverses all transmitting UEs, estimates the path loss among the transmitting UEs, sorts the transmitting UEs, selects the transmitting UE corresponding to the link with the minimum path loss, and after all the receiving UEs complete traversal, each transmitting UE can obtain a receiving UE set, and then the transmitting UE traverses all the receiving UEs in the set and excludes the receiving UEs with longer distances according to the effective communication range (distance control), thereby finally determining the active set of each transmitting UE. As shown in fig. 4, UE1 represents a transmitting UE that needs to transmit information, UE2 within an ellipse, UE3 represents a receiving UE that meets the requirement of a communication distance within D, and UE4 represents a receiving UE that does not meet the requirement of a communication distance and does not need to be served.
if one mobile terminal is randomly selected as a receiving terminal under the active set of the transmitting terminal, the real-time link states of different mobile terminals under the active set cannot be comprehensively considered, and resources are likely to be allocated to the receiving terminal with a poor link state in a random selection mode, so that communication failure is caused, and the Packet Reception success rate (PRR) is low.
The FIFO resource allocation scheme also preferentially allocates resources only for the receiver that arrives first and then for the receiver that arrives first, and if the real-time link state of the receiver is not good, it will also result in allocating resources to the receiver that has a bad link state, resulting in a lower PRR.
the embodiment of the invention adopts an improved resource allocation Scheme, considers the real-time state of a link into the resource allocation Scheme, finds a proper Modulation Coding Scheme and a proper Transport Block Size (TBS) index in a Modulation and Coding Strategy (MCS) table through a certain mapping mode according to CQI information reported by a mobile terminal under an active set during the communication process, and then finds the corresponding Transport Block Size in a TBS index table. The role of MCS includes deciding the amount of data to be transmitted efficiently and affecting the decoding success rate of the terminal.
in this embodiment, the real-time status of the link is combined with the resource allocation scheme according to the CQI information feedback, the maximum amount of data that can be transmitted in the current channel status is calculated from the obtained CQI information, a higher priority is configured for the mobile terminal with a good channel status, and resource allocation is preferentially performed.
The following provides a system level simulation result under the resource allocation mode randomly selected for the receiving end and the resource allocation mode based on the CQI feedback information, and the statistical result is PRR. As shown in fig. 5, where the hexagonal area is a cellular network, the scale is a distance reference value of the mobile end, the point within the hexagonal area is indicated as the mobile end, and the rectangular area is modeled as an obstacle.
the specific parameters of the system level simulation are shown in table 1:
TABLE 1
In the process of counting results, the results obtained by each simulation are different in consideration of randomness introduced in the simulation. The influence of randomness can be eliminated as much as possible by multiple times of simulation and averaging. According to the current simulation experience, when the average result obtained by running N times of simulation is smaller than the average result obtained by running N +1 times of simulation, the simulation is considered to be stable. In this study, it is basically satisfactory to take N to 9 or 10.
the simulation results are shown in table 2 below, (statistical results are mean PRR, 1000 slots/group):
TABLE 2
As can be seen from the simulation results, the embodiment of the present invention adopts the resource allocation scheme based on CQI feedback, and the reception success rate (PRR) obtained by considering the real-time link status into resource allocation is significantly higher than that of the randomly selected resource allocation scheme.
In two aspects, an embodiment of the present invention further provides an access device, as shown in fig. 6, including:
an information confirmation unit 601, configured to determine a target active set and a transmitting end; the target activation set comprises at least two receiving ends, and the receiving ends are receiving equipment for receiving the data transmitted by the transmitting ends;
A state obtaining unit 602, configured to obtain, by the access device, a link state of the receiving end;
A resource allocation unit 603, configured to select a receiving end with a better link state from the active set as a target receiving end, and allocate resources to the target receiving end.
The access device may generally be a network device deployed in an access network and responsible for allocating communication resources for a transmitting end or a receiving end, such as a base station (E-UTRAN Node B, eNB) in the E-UTRAN in fig. 1, and may also be, for example: an arbitrary Access device including a wireless Access Point (AP). The embodiments of the present invention are not limited to the embodiments.
The transmitting end and the receiving end are a relative concept, in the process of one-time data transmission, the source end of the data is the transmitting end, and correspondingly, the destination end of the data is the receiving end; one transmitting end may have a plurality of receiving ends, and in the system configuration shown in fig. 1, there are 1 transmitting end and 3 receiving ends.
In this embodiment, the link state of the receiving end refers to the quality of the link between the receiving end and the transmitting end, and any parameter that reflects the quality of the link may be adopted.
According to the technical scheme, the embodiment of the invention has the following advantages: the access device can determine the link condition between the receiving end and the transmitting end by obtaining the link state of the receiving end, thereby determining the target receiving end and distributing resources for the target receiving end, thus avoiding the problem that the resource distribution scheme of FIFO and random selection of the receiving end can not effectively utilize the system resources, improving the PRR of the receiving end and improving the system performance.
In an optional implementation manner, the embodiment of the present invention further provides an implementation scheme for specifically determining a link state, which is as follows: the state obtaining unit 602 is configured to receive a channel quality indicator CQI sent by a receiving end in the target active set;
The resource allocation unit 603 is configured to determine the priority of the receiving end according to the CQI, where the better the CQI is, the higher the priority of the receiving end corresponding to the CQI is; and selecting a receiving end with higher priority in the target active set as a target receiving end, and allocating resources for the target receiving end.
In this embodiment, the link status between the receiving end and the transmitting end can be known in detail through the CQI reported by the receiving end, and it can be understood that: if the receiving ends in the target active set all send the CQI, the priority of each receiving end can be obtained, and the receiving ends which do not send the CQI can be disregarded, and indication information can be sent to the receiving ends to indicate the receiving ends to feed back the CQI.
In an optional implementation manner, an implementation scheme for determining the priority by the CQI is further provided in the embodiments of the present invention, and the implementation scheme is as follows: the resource allocation unit 603 is configured to determine, according to the CQI, a maximum data amount that can be currently transmitted by the receiving end; and determining the priority of the receiving end according to the maximum data volume, wherein the larger the maximum data volume is, the higher the priority of the receiving end corresponding to the maximum data volume is.
In this embodiment, the maximum data amount that the receiving end can transmit is determined by the CQI, and it can be understood that the better the link status is, the larger the maximum data amount that can be transmitted is, and the receiving end obtains a higher priority.
In an optional implementation manner, an embodiment of the present invention further provides a determination scheme for an active set, which is specifically as follows: the information confirming unit 601 is configured to receive a transmitting end of the receiving device reported by the receiving device, and determine that all receiving devices corresponding to the transmitting end are used as a target active set of the transmitting end; and the transmitting end of the receiving equipment reported by the receiving equipment is the transmitting end corresponding to the minimum path loss of the receiving equipment.
in this embodiment, each terminal device may use itself as a receiving end to report the state of a communication link between itself and a surrounding terminal device, so that the access device will obtain a transmitting end as a source end of data and can serve as all terminal devices of the corresponding receiving end. In addition, in this embodiment, the transmitting end that is reported by the terminal device is required to have the minimum path loss, so that the problem caused by reporting too many interference items can be reduced.
In an alternative implementation manner, in the car networking system, the receiving end and the transmitting end are both cars, and for cars far away from each other, the mutual influence is less, and the effective communication range of the car should be limited, and based on this embodiment of the present invention, an implementation scheme for modifying the active set is further provided, specifically as follows: as shown in fig. 7, the access device further includes:
An information adjusting unit 701, configured to delete, after the determination that all receiving devices corresponding to the transmitting end are used as the target active set of the transmitting end, the receiving device located outside the effective communication range of the transmitting end in the target active set.
In this embodiment, the effective communication range may be a set relative distance between the transmitting end and the receiving end.
in an optional implementation manner, since the access device already obtains the CQI, the embodiment of the present invention further provides an implementation scheme for performing resource allocation based on the CQI, which is as follows: the resource allocation unit 603 is configured to determine a modulation and coding strategy and a transport block size according to the CQI.
embodiments of the present invention in three aspects further provide another access device, as shown in fig. 7, including: a processor 701, an input-output device 702, and a memory 703;
An executable program is stored in the memory 703; the processor 701 implements the following method flow by executing the executable program:
Determining a target active set and a transmitting terminal; the target activation set comprises at least two receiving ends, and the receiving ends are receiving equipment for receiving the data transmitted by the transmitting ends;
Acquiring the link state of the receiving end;
And selecting a receiving end with a better link state from the active set as a target receiving end, and allocating resources for the target receiving end.
the access device may generally be a network device deployed in an access network and responsible for allocating communication resources for a transmitting end or a receiving end, such as a base station (E-UTRAN Node B, eNB) in the E-UTRAN in fig. 1, and may also be, for example: an arbitrary Access device including a wireless Access Point (AP). The embodiments of the present invention are not limited to the embodiments.
the transmitting end and the receiving end are a relative concept, in the process of one-time data transmission, the source end of the data is the transmitting end, and correspondingly, the destination end of the data is the receiving end; one transmitting end may have a plurality of receiving ends, and in the system configuration shown in fig. 1, there are 1 transmitting end and 3 receiving ends.
in this embodiment, the link state of the receiving end refers to the quality of the link between the receiving end and the transmitting end, and any parameter that reflects the quality of the link may be adopted.
the access device can determine the link condition between the receiving end and the transmitting end by obtaining the link state of the receiving end, thereby determining the target receiving end and distributing resources for the target receiving end, thus avoiding the problem that the resource distribution scheme of FIFO and random selection of the receiving end can not effectively utilize the system resources, improving the PRR of the receiving end and improving the system performance.
According to the technical scheme, the embodiment of the invention has the following advantages: the access device can determine the link condition between the receiving end and the transmitting end by obtaining the link state of the receiving end, thereby determining the target receiving end and distributing resources for the target receiving end, thus avoiding the problem that the resource distribution scheme of FIFO and random selection of the receiving end can not effectively utilize the system resources, improving the PRR of the receiving end and improving the system performance.
In an optional implementation manner, the embodiment of the present invention further provides an implementation scheme for specifically determining a link state, which is as follows: the acquiring, by the processor 701, the link state of the receiving end includes:
Receiving a Channel Quality Indicator (CQI) sent by a receiving end in the target active set;
The selecting a receiving end with a better link state from the active set as a target receiving end, and allocating resources to the target receiving end includes:
Determining the priority of the receiving end according to the CQI, wherein the better the CQI is, the higher the priority of the receiving end corresponding to the CQI is;
And selecting a receiving end with higher priority in the target active set as a target receiving end, and allocating resources for the target receiving end.
in this embodiment, the link status between the receiving end and the transmitting end can be known in detail through the CQI reported by the receiving end, and it can be understood that: if the receiving ends in the target active set all send the CQI, the priority of each receiving end can be obtained, and the receiving ends which do not send the CQI can be disregarded, and indication information can be sent to the receiving ends to indicate the receiving ends to feed back the CQI.
In an optional implementation manner, an implementation scheme for determining the priority by the CQI is further provided in the embodiments of the present invention, and the implementation scheme is as follows: the processor 701 determines the priority of the receiving end according to the CQI, where the better the CQI is, the higher the priority of the receiving end corresponding to the CQI is, the following are included:
Determining the maximum data volume which can be currently transmitted by the receiving end according to the CQI;
and determining the priority of the receiving end according to the maximum data volume, wherein the larger the maximum data volume is, the higher the priority of the receiving end corresponding to the maximum data volume is.
in this embodiment, the maximum data amount that the receiving end can transmit is determined by the CQI, and it can be understood that the better the link status is, the larger the maximum data amount that can be transmitted is, and the receiving end obtains a higher priority.
in an optional implementation manner, an embodiment of the present invention further provides a determination scheme for an active set, which is specifically as follows: the processor 701 determining the target active set includes:
a transmitting terminal of the receiving equipment reported by the receiving equipment determines that all receiving equipment corresponding to the transmitting terminal is used as a target active set of the transmitting terminal; and the transmitting end of the receiving equipment reported by the receiving equipment is the transmitting end corresponding to the minimum path loss of the receiving equipment.
in this embodiment, each terminal device may use itself as a receiving end to report the state of a communication link between itself and a surrounding terminal device, so that the access device will obtain a transmitting end as a source end of data and can serve as all terminal devices of the corresponding receiving end. In addition, in this embodiment, the transmitting end that is reported by the terminal device is required to have the minimum path loss, so that the problem caused by reporting too many interference items can be reduced.
In an alternative implementation manner, in the car networking system, the receiving end and the transmitting end are both cars, and for cars far away from each other, the mutual influence is less, and the effective communication range of the car should be limited, and based on this embodiment of the present invention, an implementation scheme for modifying the active set is further provided, specifically as follows: the processor 701 is further configured to delete, after the determination that all receiving devices corresponding to the transmitting end are used as the target active set of the transmitting end, the receiving devices located outside the effective communication range of the transmitting end in the target active set.
in this embodiment, the effective communication range may be a set relative distance between the transmitting end and the receiving end.
in an optional implementation manner, since the access device already obtains the CQI, the embodiment of the present invention further provides an implementation scheme for performing resource allocation based on the CQI, which is as follows: the allocating, by the processor 701, resources to the target receiving end includes:
And determining a modulation and coding strategy and a transmission block size according to the CQI.
Fig. 8 is a schematic structural diagram of an access device 800 according to an embodiment of the present invention, where the access device 800 may have a relatively large difference due to different configurations or performances, and may include one or more Central Processing Units (CPUs) 822 (e.g., one or more processors) and a memory 832, and one or more storage media 830 (e.g., one or more mass storage devices) for storing applications 842 or data 844. Memory 832 and storage medium 830 may be, among other things, transient or persistent storage. The program stored on the storage medium 830 may include one or more modules (not shown), each of which may include a series of instruction operations for access to the device. Still further, central processor 822 may be disposed in communication with storage medium 830 to carry out a sequence of instruction operations in storage medium 830 on access device 800.
access device 800 may also include one or more power supplies 826, one or more wired or wireless network interfaces 850, one or more input-output interfaces 858, and/or one or more operating systems 841, such as UnixTM, LinuxTM, FreeBSDTM, etc.
the steps performed by the access device in the above embodiment may be based on the access device structure shown in fig. 8
it should be noted that, in the above embodiment of the access device, each included unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
In addition, it is understood by those skilled in the art that all or part of the steps in the above method embodiments may be implemented by related hardware, and the corresponding program may be stored in a computer readable storage medium, where the above mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiment of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A method for resource allocation, comprising:
The access equipment determines a target activation set and a transmitting terminal; the target activation set comprises at least two receiving ends, and the receiving ends are receiving equipment for receiving the data transmitted by the transmitting ends;
The access equipment receives a Channel Quality Indicator (CQI) sent by a receiving end in the target active set;
determining the maximum data volume which can be currently transmitted by the receiving end according to the CQI;
Determining the priority of the receiving end according to the maximum data volume, wherein the larger the maximum data volume is, the higher the priority of the receiving end corresponding to the maximum data volume is;
and selecting a receiving end with higher priority in the target active set as a target receiving end, and allocating resources for the target receiving end.
2. The method of claim 1, wherein the access device determining the target active set comprises:
Receiving a transmitting terminal of the receiving device reported by the receiving device, and determining all receiving devices corresponding to the transmitting terminal as a target active set of the transmitting terminal; and the transmitting end of the receiving equipment reported by the receiving equipment is the transmitting end corresponding to the minimum path loss of the receiving equipment.
3. the method of claim 2, wherein after the determining that all receiving devices corresponding to the transmitting end are used as the target active set of the transmitting end, the method further comprises:
And deleting the receiving equipment which is positioned outside the effective communication range of the transmitting end in the target active set.
4. The method of claim 1, wherein the allocating resources to the target receiving end comprises:
And determining a modulation and coding strategy and a transmission block size according to the CQI.
5. An access device, comprising:
The information confirmation unit is used for determining a target active set and a transmitting terminal; the target activation set comprises at least two receiving ends, and the receiving ends are receiving equipment for receiving the data transmitted by the transmitting ends;
A state obtaining unit, configured to receive a channel quality indicator CQI sent by a receiving end in the target active set;
A resource allocation unit, configured to determine, according to the CQI, a maximum amount of data that can be currently transmitted by the receiving end; determining the priority of the receiving end according to the maximum data volume, wherein the larger the maximum data volume is, the higher the priority of the receiving end corresponding to the maximum data volume is;
and selecting a receiving end with higher priority in the target active set as a target receiving end, and allocating resources for the target receiving end.
6. The access device of claim 5,
the information confirmation unit is configured to receive a transmitting end of the receiving device reported by the receiving device, and determine that all receiving devices corresponding to the transmitting end are used as a target active set of the transmitting end; and the transmitting end of the receiving equipment reported by the receiving equipment is the transmitting end corresponding to the minimum path loss of the receiving equipment.
7. the access device of claim 6, wherein the access device further comprises:
and the information adjusting unit is used for deleting the receiving equipment which is positioned outside the effective communication range of the transmitting terminal in the target active set after all the receiving equipment corresponding to the transmitting terminal is determined to be used as the target active set of the transmitting terminal.
8. The access device of claim 5,
and the resource allocation unit is used for determining a modulation and coding strategy and a transport block size according to the CQI.
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| CN108631917A (en) | 2017-03-24 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of information transferring method and device |
| CN106941723B (en) * | 2017-05-05 | 2020-09-11 | 宇龙计算机通信科技(深圳)有限公司 | Data transmission method and base station |
| CN108513316B (en) * | 2018-04-10 | 2021-05-14 | 电子科技大学 | Wireless network protocol performance modeling method |
| CN109451568A (en) * | 2018-10-12 | 2019-03-08 | 中通服咨询设计研究院有限公司 | A kind of Poewr control method of the heterogeneous network with partial connectivity |
| CN111246424B (en) * | 2019-01-11 | 2022-11-08 | 展讯通信（上海）有限公司 | Data feedback processing method and device |
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