CN108810902B - Wireless backhaul resource adjustment method and base station - Google Patents
Wireless backhaul resource adjustment method and base station Download PDFInfo
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- CN108810902B CN108810902B CN201710294985.7A CN201710294985A CN108810902B CN 108810902 B CN108810902 B CN 108810902B CN 201710294985 A CN201710294985 A CN 201710294985A CN 108810902 B CN108810902 B CN 108810902B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
Abstract
The invention discloses a method for adjusting wireless backhaul resources and a base station, wherein the method comprises the following steps: the target base station judges whether the current subframe of the current backhaul scheduling period is a subframe corresponding to the backhaul resource based on preset air interface time-frequency resource partition configuration; if yes, and the target base station does not enter a return resource adjustment mode, the target base station counts the Physical Resource Block (PRB) scheduling rate of each subframe of the previous return scheduling period; the target base station determines whether to enter a return resource adjustment mode or not based on the PRB scheduling rate; and if the access is determined, the target base station adjusts the sub-frame corresponding to the return resource from the sub-frame n-k to the sub-frame n in the air interface time frequency resource allocation to the sub-frame corresponding to the service resource. The invention adds a feedback resource adjusting mode, determines whether to adjust the feedback resource into the service resource by dividing the air interface time frequency resource into the feedback resource and the service resource and based on the PRB scheduling rate of the subframe, thereby improving the cell throughput.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and a base station for adjusting wireless backhaul resources.
Background
With the wide popularization of Long Term Evolution (LTE) technology in industrial applications, the deployment environment of base stations is more and more complex, and higher requirements are put on base station backhaul, and because many industrial application scenarios are rare and infrastructure is simple, the construction period of building a traditional wired transmission network is Long, and the cost is high, so that the wireless transmission, especially the wireless network backhaul, is used, and the cost, the construction period and the flexibility are obviously superior. However, wireless transmission is limited by allocated spectrum bandwidth, co-channel interference, and utilization of backhaul spectrum, so a wireless backhaul resource adjustment scheme is urgently needed and is suitable for the LTE system.
The basic principle of the existing LTE wireless backhaul technology is as follows: the base station integrates two sets of LTE protocol stacks, namely a network protocol stack and a terminal protocol stack, the base station is provided with a return device, the base station uses the network protocol stack, and the return device arranged by the base station uses the terminal protocol stack to be attached to an adjacent base station of the base station, so that the return device arranged by the base station bears data of an S1 interface protocol, namely return data, and the purpose of multiplexing return links of the adjacent base station is achieved.
The main defects of the existing LTE wireless backhaul technology are as follows 1-3:
1. when the base station is deployed at the same frequency, the interference to the base station is large because the backhaul equipment configured by the base station is very close to the base station but is scheduled by the adjacent base stations of the base station, and the service quality and the backhaul channel rate of the base station are affected.
2. The backhaul links of different base stations occupy the same subframe, which may cause air interface resource waste when backhaul data is not consistent.
3. Due to limited wireless backhaul resources, backhaul link bandwidth is smaller than air interface bandwidth, which may cause congestion without differential packet loss, such as loss of signaling or control information, which may cause a decrease in stability of the LTE system.
Disclosure of Invention
In view of the above problems, the present invention provides a method and a base station for adjusting wireless backhaul resources, which overcome the above problems or at least partially solve the above problems.
To this end, in a first aspect, the present invention provides a method for adjusting wireless backhaul resources, including:
the target base station judges whether the current subframe of the current backhaul scheduling period is a subframe corresponding to the backhaul resource based on preset air interface time-frequency resource partition configuration; the air interface time frequency resource division configuration comprises the following steps: the corresponding relation between the sub-frame and the return resource;
if the current subframe of the current feedback scheduling period is a subframe corresponding to the feedback resource and the target base station does not enter the feedback resource adjustment mode, the target base station counts the Physical Resource Block (PRB) scheduling rate of each subframe of the previous feedback scheduling period;
the target base station determines whether to enter a return resource adjustment mode or not based on the PRB scheduling rate of each subframe of the last return scheduling period;
if the return resource adjustment mode is determined to be entered, the target base station adjusts the sub-frame corresponding to the return resource from the sub-frame n-k to the sub-frame n in the air interface time frequency resource allocation to the sub-frame corresponding to the service resource; wherein n and k are preset positive integers, and n is greater than k.
Optionally, the method further includes, before determining whether the current subframe of the current backhaul scheduling period is a subframe corresponding to the backhaul resource, that is:
the target base station determines air interface time frequency resource partition configuration corresponding to the base station type according to the predetermined base station type;
wherein the base station types include: a level 1 base station …, a level N base station, wherein N is a positive integer which is larger than 1 and is predetermined based on network planning configuration; the level 1 base station is connected with the root base station, is provided with a backhaul device and provides backhaul access service for the adjacent base stations; the root base station is a base station connected with a packet core network, and a backhaul device configured by the level 1 base station is attached to the root base station; the N-level base station is connected with the N-1-level base station and is provided with backhaul equipment, and the backhaul equipment configured by the N-level base station is attached to the N-1-level base station; the air interface time frequency resource is divided and configured into a service resource and a return resource which are divided and configured according to the type of the base station.
Optionally, the air interface time-frequency resource partition configuration is a partition configuration that divides air interface time-frequency resources into service resources and backhaul resources, which is predetermined based on the type of the base station, and specifically includes:
the air interface time frequency resource partition configuration is a partition configuration which is predetermined based on a preset interference suppression scheduling rule and divides the air interface time frequency resource into service resources and return resources;
wherein the interference suppression scheduling rule comprises:
the feedback resources of the i-1 level base station and the i level base station are not in the same subframe, and i is more than 1 and less than or equal to N;
the return resources and the service resources of the j-level base station are not in the same subframe, and j is more than or equal to 1 and less than or equal to N.
Optionally, the determining, by the target base station, whether to enter a backhaul resource adjustment mode based on the PRB scheduling rate of each subframe of the previous backhaul scheduling period includes:
the target base station judges whether the PRB scheduling rate of each subframe of the previous feedback scheduling period is greater than a preset PRB scheduling rate first threshold or not; if yes, determining to enter a return resource adjusting mode; otherwise, determining not to enter the backhaul resource adjustment mode.
Optionally, after determining whether the current subframe of the current backhaul scheduling period is a subframe corresponding to the backhaul resource, the method further includes:
if the current subframe of the current feedback scheduling period is a subframe corresponding to the feedback resource and the target base station enters a feedback resource adjustment mode, the target base station counts the PRB scheduling rate of each subframe of the previous feedback scheduling period;
the target base station determines whether to exit a feedback resource adjustment mode or not based on the PRB scheduling rate of each subframe of the previous feedback scheduling period;
and if the target base station determines to exit the return resource adjustment mode, the target base station restores the subframe which is adjusted to the corresponding service resource in the air interface time frequency resource partition configuration to the subframe corresponding to the return resource.
Optionally, the determining, by the target base station, whether to exit the backhaul resource adjustment mode based on the PRB scheduling rate of each subframe of the previous backhaul scheduling period includes:
the target base station judges whether a PRB scheduling rate larger than a preset second threshold of the PRB scheduling rate exists in the PRB scheduling rates of all the subframes of the previous feedback scheduling period; if yes, determining to quit the return resource adjustment; otherwise, determining not to exit the backhaul resource adjustment.
Optionally, the method further includes:
when the target base station acquires uplink or downlink return data, sequencing the acquired return data based on a preset sequencing rule; the ordering rule is as follows:
the first sequence is as follows: the bearer of the backhaul data is SRB 1;
and a second sequence: the bearer of the backhaul data is SRB 2;
the third sequence: the quality of service class identifier QCI of the bearer of the backhaul data is QCI 1;
the fourth order: the QCI of the bearer of the backhaul data is QCI 2;
……
the eleventh order: the QCI of the bearer of the backhaul data is QCI 9.
In a second aspect, the present invention further provides a base station, including:
a judging unit, configured to judge whether a current subframe of a current backhaul scheduling period is a subframe corresponding to a backhaul resource based on a preset air interface time-frequency resource partition configuration; the air interface time frequency resource division configuration comprises the following steps: the corresponding relation between the sub-frame and the return resource;
a counting unit, configured to count a physical resource block PRB scheduling rate of each subframe of a previous backhaul scheduling period when the determining unit determines that a current subframe of a current backhaul scheduling period is a subframe corresponding to a backhaul resource and the target base station does not enter a backhaul resource adjustment mode;
a determining unit, configured to determine whether to enter a backhaul resource adjustment mode based on a PRB scheduling rate of each subframe of a previous backhaul scheduling period;
an adjusting unit, configured to adjust, when the determining unit determines to enter a backhaul resource adjustment mode, a subframe corresponding to a backhaul resource from a subframe n-k to a subframe n in the air interface time-frequency resource allocation to a subframe corresponding to a service resource; wherein n and k are preset positive integers, and n is greater than k.
Optionally, the method further includes:
an air interface time frequency resource partition configuration determining unit, configured to determine, according to a predetermined base station type, an air interface time frequency resource partition configuration corresponding to the base station type;
wherein the base station types include: a level 1 base station …, a level N base station, wherein N is a positive integer which is larger than 1 and is predetermined based on network planning configuration; the level 1 base station is connected with the root base station, is provided with a backhaul device and provides backhaul access service for the adjacent base stations; the root base station is a base station connected with a packet core network, and a backhaul device configured by the level 1 base station is attached to the root base station; the N-level base station is connected with the N-1-level base station and is provided with backhaul equipment, and the backhaul equipment configured by the N-level base station is attached to the N-1-level base station; the air interface time frequency resource is divided and configured into a service resource and a return resource which are divided and configured according to the type of the base station.
Optionally, the air interface time-frequency resource partition configuration is a partition configuration that divides air interface time-frequency resources into service resources and backhaul resources, which is predetermined based on the type of the base station, and specifically includes:
the air interface time frequency resource partition configuration is a partition configuration which is predetermined based on a preset interference suppression scheduling rule and divides the air interface time frequency resource into service resources and return resources;
wherein the interference suppression scheduling rule comprises:
the feedback resources of the i-1 level base station and the i level base station are not in the same subframe, and i is more than 1 and less than or equal to N;
the return resources and the service resources of the j-level base station are not in the same subframe, and j is more than or equal to 1 and less than or equal to N.
Compared with the prior art, the wireless backhaul resource adjustment method and the base station provided by the invention have the advantages that a backhaul resource adjustment mode is newly added, the air interface time-frequency resources are divided into backhaul resources and service resources, and whether the backhaul resources are adjusted to the service resources is determined based on the PRB scheduling rate of each subframe of the previous backhaul scheduling period, so that the cell throughput is improved.
Further, according to the wireless backhaul resource adjustment method and the base station provided by the present invention, different base station types correspond to different air interface time-frequency resource partition configurations, so that backhaul resources of different base stations correspond to different subframes, and the problem of air interface resource waste caused by the situation that backhaul links of different base stations occupy the same subframe and backhaul data is not consistent in the prior art is solved.
Further, according to the wireless backhaul resource adjusting method and the base station provided by the present invention, the air interface time-frequency resource is divided and configured into the division and configuration of dividing the air interface time-frequency resource into the service resource and the backhaul resource, which are predetermined based on the preset interference suppression scheduling rule, so that the interference of the backhaul device configured by the base station to the base station is greatly suppressed.
Further, the wireless backhaul resource adjustment method and the base station provided by the present invention prioritize backhaul data to ensure that backhaul data of a high priority logical channel is preferentially sent, in order to solve the problem that congestion indiscriminate packet loss, such as loss of signaling or control information, may cause a decrease in stability of an LTE system, due to limited wireless backhaul resources and a backhaul link bandwidth being smaller than an air interface bandwidth.
Drawings
Fig. 1 is a flowchart of a method for adjusting wireless backhaul resources according to a first embodiment of the present invention;
fig. 2 is a wireless backhaul topology according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of air interface time-frequency resource partitioning configuration corresponding to different base station types according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of air interface time-frequency resource partition configuration corresponding to different base station types according to a second embodiment of the present invention;
fig. 5 is a schematic diagram illustrating allocation of air interface time-frequency resources corresponding to different base station types when entering a backhaul resource adjustment mode according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of a base station according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention.
It should be noted that, in this document, relational terms such as "first" and "second", and the like are used only to distinguish the same names, and do not imply a relationship or order between the names.
As shown in fig. 1, the present embodiment discloses a method for adjusting wireless backhaul resources, which may include the following steps 101 to 104:
101. the target base station judges whether the current subframe of the current backhaul scheduling period is a subframe corresponding to the backhaul resource based on preset air interface time-frequency resource partition configuration; the air interface time frequency resource division configuration comprises the following steps: the corresponding relation between the sub-frame and the return resource.
In this embodiment, the base station is an execution subject of the method for adjusting the wireless backhaul resource, and the target base station is the base station that is executing the method of this embodiment.
In this embodiment, different base stations preset different air interface time-frequency resource partition configurations, that is, different subframes corresponding to different base stations return resources do not cause air interface resource waste under the condition that return data is not consistent.
102. If the current subframe of the current backhaul scheduling period is a subframe corresponding to the backhaul Resource and the target base station does not enter the backhaul Resource adjustment mode, the target base station counts a Physical Resource Block (PRB) scheduling rate of each subframe of the previous backhaul scheduling period.
In this embodiment, a backhaul resource adjustment mode is added, and in the backhaul resource adjustment mode, the base station may adjust the backhaul resource to a service resource, so as to improve the throughput of the cell in which the base station is located.
103. And the target base station determines whether to enter a return resource adjustment mode or not based on the PRB scheduling rate of each subframe of the last return scheduling period.
104. If the return resource adjustment mode is determined to be entered, the target base station adjusts the sub-frame corresponding to the return resource from the sub-frame n-k to the sub-frame n in the air interface time frequency resource allocation to the sub-frame corresponding to the service resource; wherein n and k are preset positive integers, and n is greater than k.
In this embodiment, it is considered that the backhaul channel data is compressed by using a Snappy compression tool, and even in the fast compression mode, the compression rate is 32%, and in addition, the backhaul devices are all equipped with high-gain directional antennas, and the channel quality is much higher than that of the service device, so the backhaul resource overhead is often lower than that of the preconfigured backhaul resource, and therefore, the ratio of the service resource to the backhaul resource needs to be dynamically adjusted, the service resource occupancy is improved, and the cell throughput is improved.
In this embodiment, some subframe numbers are fixed: and from the subframe n-k to the subframe n, different base stations enter a return resource adjusting mode, and return resource adjustment is carried out on the fixed subframe numbers, so that non-adaptive adjustment of return resources by the different base stations is realized, and the proportion of service resources to the return resources is dynamically adjusted under the condition of not increasing signaling interaction between the stations.
In this embodiment, the subframes n-k to the subframe n are, for example, the subframe 0 to the subframe 4, that is, the first half frame of a radio frame, so that different base stations enter the backhaul resource adjustment mode, and all perform backhaul resource adjustment on the first half frame, specifically: and adjusting the subframe corresponding to the return resource in the first half frame into the subframe corresponding to the service resource.
In this embodiment, the air interface time-frequency resource is divided into a backhaul resource and a service resource, where the backhaul resource is used to provide a service for accessing and transmitting backhaul data to backhaul equipment configured by an adjacent base station, and the service resource is used for service equipment (service equipment, such as User Equipment (UE)) to transmit service data.
It can be seen that, compared with the prior art, in the method for adjusting wireless backhaul resources provided in this embodiment, a backhaul resource adjustment mode is newly added, and whether backhaul resources are adjusted to be service resources is determined based on PRB scheduling rates of subframes in a previous backhaul scheduling period by dividing air interface time-frequency resources into backhaul resources and service resources, thereby improving cell throughput.
In a specific example, before the step 101 of determining whether the current subframe of the current backhaul scheduling period is the subframe corresponding to the backhaul resource, the method further includes the step 100, not shown in fig. 1:
100. the target base station determines air interface time frequency resource partition configuration corresponding to the base station type according to the predetermined base station type;
wherein the base station types include: a level 1 base station …, a level N base station, wherein N is a positive integer which is larger than 1 and is predetermined based on network planning configuration; the level 1 base station is connected with the root base station, is provided with a backhaul device and provides backhaul access service for the adjacent base stations; the root base station is a base station connected with an Evolved Packet Core (EPC), and backhaul equipment configured by the level 1 base station is attached to the root base station; the N-level base station is connected with the N-1-level base station and is provided with backhaul equipment, and the backhaul equipment configured by the N-level base station is attached to the N-1-level base station; the air interface time frequency resource is divided and configured into a service resource and a return resource which are divided and configured according to the type of the base station.
Examples are as follows: fig. 2 shows a wireless backhaul topology, and fig. 3 shows a schematic diagram of air interface time-frequency resource allocation configuration corresponding to different base station types. In fig. 2, the base station types are two types: a class 1 base station, a class 2 base station. In fig. 3, the allocation of air interface time-frequency resource division includes: the air interface time frequency resource partition configuration corresponding to the level 1 base station, the air interface time frequency resource partition configuration corresponding to the level 2 base station, the service resource and the backhaul resource are configured according to a 3:2 ratio, and those skilled in the art can determine the configuration ratio of the service resource and the backhaul resource according to the network planning configuration.
As can be seen from fig. 3, different base station types correspond to different air interface time-frequency resource partition configurations, and the backhaul resources of different base stations correspond to different subframes, so as to solve the problem that the backhaul links of different base stations occupy the same subframe and cause air interface resource waste in the case of discontinuous backhaul data in the prior art.
In a specific example, the allocation of the air interface time-frequency resource partition in the previous embodiment is a partition allocation that is predetermined based on the type of the base station and that divides the air interface time-frequency resource into a service resource and a backhaul resource, and specifically includes:
the air interface time frequency resource partition configuration is a partition configuration which is predetermined based on a preset interference suppression scheduling rule and divides the air interface time frequency resource into service resources and return resources;
wherein the interference suppression scheduling rule comprises:
the feedback resources of the i-1 level base station and the i level base station are not in the same subframe, and i is more than 1 and less than or equal to N;
the return resources and the service resources of the j-level base station are not in the same subframe, and j is more than or equal to 1 and less than or equal to N.
It can be seen that, in this embodiment, it is considered that backhaul equipment configured by a base station needs to be attached to an adjacent station, and since backhaul equipment configured by the base station is closer to an antenna of the base station and may generate a large interference to the base station, allocation of air interface time-frequency resources is determined based on a preset interference suppression scheduling rule.
Examples are as follows: taking fig. 3 as an example, backhaul resources of the level 1 base station and the level 2 base station are not in the same subframe. The backhaul resource and the service resource of the level 1 base station are not in the same subframe, and the backhaul resource and the service resource of the level 2 base station are not in the same subframe. Therefore, the air interface time frequency resource division configuration corresponding to the level 1 base station and the level 2 base station both meet the interference suppression scheduling rule, the interference of the backhaul device configured by the level 1 base station to the level 1 base station is greatly suppressed, and the level 2 base station is the same.
Further, taking fig. 4 as an example, fig. 4 shows a schematic diagram of air interface time-frequency resource partitioning configuration corresponding to another different base station type, and the difference from fig. 3 is that, in fig. 4, backhaul resources and service resources are further frequency partitioned, that is, in fig. 4, backhaul resources and service resources are both partitioned into three frequency bands, in order to further suppress interference, the interference suppression scheduling rule may further include: the frequency sequence of the i-1 level base station and the i level base station in the same subframe is different, i is more than 1 and less than or equal to N; for example: and when the subframe is 0, the level 1 base station starts scheduling from the uppermost frequency band and gradually schedules downwards, and the level 2 base station starts scheduling from the lowermost frequency band and gradually schedules upwards.
In a specific example, the determining, by the target base station in step 102 shown in fig. 1, whether to enter the backhaul resource adjustment mode based on the PRB scheduling rate of each subframe in the previous backhaul scheduling period includes:
the target base station judges whether the PRB scheduling rate of each subframe of the previous feedback scheduling period is greater than a preset PRB scheduling rate first threshold or not; if yes, determining to enter a return resource adjusting mode; otherwise, determining not to enter the backhaul resource adjustment mode.
Examples are as follows: taking fig. 3 as an example, the level 1 base station performs PRB scheduling statistics on the backhaul devices configured by the accessed level 2 base station, and if the number of PRB scheduling values of each subframe in the previous backhaul scheduling period (the backhaul scheduling period is configurable and is default to 5 radio frames) is less than 30% of the total number of PRBs (i.e. the first threshold of PRB scheduling rate is 30%), enters a backhaul resource adjustment mode, stops scheduling backhaul resources from subframe n-k to subframe n (e.g. from subframe 0 to subframe 4, that is, the first half frame of a radio frame), and converts the backhaul resources of the first half frame into service resources.
The level 2 base station carries out PRB scheduling statistics on the return terminal configured by the level 2 base station, and if the PRB scheduling number of each subframe in the last return scheduling period is less than 30% of the total number of PRBs, the level 2 base station enters a return resource adjustment mode, stops scheduling the return resources of the first half frame, and converts the return resources of the first half frame into service resources.
Fig. 5 shows a schematic diagram of allocation of air interface time-frequency resources corresponding to different base station types entering a backhaul resource adjustment mode, and in fig. 5, both the level 1 base station and the level 2 base station convert backhaul resources in subframes n-k to subframe n (for example, subframes 0 to 4, that is, the first half frame of a radio frame) into service resources, thereby improving cell throughput.
In a specific example, after the step 101 in fig. 1 of determining whether the current subframe of the current backhaul scheduling period is the subframe corresponding to the backhaul resource, the following steps 102 'to 104' not shown in fig. 1 are further included:
102', if the current subframe of the current backhaul scheduling period is the subframe corresponding to the backhaul resource and the target base station has entered the backhaul resource adjustment mode, the target base station counts the PRB scheduling rate of each subframe of the previous backhaul scheduling period;
103', the target base station determines whether to exit the feedback resource adjustment mode based on the PRB scheduling rate of each subframe of the previous feedback scheduling period;
104', if the return resource adjustment mode is determined to exit, the target base station restores the subframe which is adjusted to the corresponding service resource in the air interface time frequency resource partition configuration to the subframe corresponding to the return resource.
Step 103', the target base station determines whether to exit the backhaul resource adjustment mode based on the PRB scheduling rate of each subframe of the previous backhaul scheduling period, including:
the target base station judges whether a PRB scheduling rate larger than a preset second threshold of the PRB scheduling rate exists in the PRB scheduling rates of all the subframes of the previous feedback scheduling period; if yes, determining to quit the return resource adjustment; otherwise, determining not to exit the backhaul resource adjustment.
Examples are as follows: taking fig. 5 as an example, in the backhaul resource adjustment mode, the level 1 base station performs PRB scheduling statistics on the backhaul device configured by the accessed level 2 base station, the level 2 base station performs PRB scheduling statistics on the backhaul device configured by the level 2 base station, and if a PRB scheduling rate greater than a preset PRB scheduling rate second threshold exists in the PRB scheduling rates of the subframes in the previous backhaul scheduling period (the PRB scheduling rate second threshold is 80%), the backhaul resource adjustment mode is exited.
In a specific example, the method shown in fig. 1 further comprises the following step 105, not shown in fig. 1:
when the target base station acquires uplink or downlink return data, sequencing the acquired return data based on a preset sequencing rule; the ordering rule is as follows:
the first sequence is as follows: the bearer of the backhaul data is SRB 1;
and a second sequence: the bearer of the backhaul data is SRB 2;
the third sequence: the Quality of Service (QoS) Class Identifier (QCI) of the bearer of the backhaul data is QCI 1;
the fourth order: the QCI of the bearer of the backhaul data is QCI 2;
……
the eleventh order: the QCI of the bearer of the backhaul data is QCI 9.
In this embodiment, considering that the wireless backhaul scheme is limited by resources, congestion and packet loss are easily caused in the backhaul link, and protection and preferential transmission of important data such as signaling and voice need to be considered. Specifically, a Data sequencer is added to a conventional Packet Data Convergence Protocol (PDCP) layer. The uplink direction waits for buffering according to the backtransmission equipment, the downlink direction waits for buffering according to a Radio Link Control (RLC) sublayer, and data assembly is performed with a period of 1 ms.
Therefore, aiming at the problems that the wireless backhaul resource is limited, and the backhaul link bandwidth is smaller than the air interface bandwidth, which can cause congestion and indiscriminate packet loss, such as loss of signaling or control information, which can cause reduction of the stability of the LTE system, the wireless backhaul resource adjustment method and the base station provided by the invention perform priority sequencing on the backhaul data, thereby ensuring that the backhaul data of a high-priority logic channel is preferentially sent.
As shown in fig. 6, the present embodiment discloses a base station, which may include the following units: the determining unit 61, the counting unit 62, the determining unit 63, and the adjusting unit 64 are specifically described as follows:
a determining unit 61, configured to determine, based on a preset air interface time-frequency resource partition configuration, whether a current subframe of a current backhaul scheduling period is a subframe corresponding to a backhaul resource; the air interface time frequency resource division configuration comprises the following steps: the corresponding relation between the sub-frame and the return resource;
a counting unit 62, configured to count a physical resource block PRB scheduling rate of each subframe of the previous backhaul scheduling period when the determining unit 61 determines that the current subframe of the current backhaul scheduling period is a subframe corresponding to a backhaul resource and the target base station does not enter the backhaul resource adjustment mode;
a determining unit 63, configured to determine whether to enter a backhaul resource adjustment mode based on a PRB scheduling rate of each subframe in a previous backhaul scheduling period;
an adjusting unit 64, configured to adjust, when the determining unit 63 determines to enter a backhaul resource adjustment mode, a subframe corresponding to a backhaul resource from a subframe n-k to a subframe n in the air-interface time-frequency resource allocation as a subframe corresponding to a service resource; wherein n and k are preset positive integers, and n is greater than k.
The base station disclosed in this embodiment can implement the method flow shown in fig. 1, and therefore, the effect and description of the base station in this embodiment can refer to the method embodiment shown in fig. 1, and are not described herein again.
In a specific example, the base station shown in fig. 6 further includes the following units not shown in fig. 6:
an air interface time-frequency resource partition configuration determining unit 60, configured to determine, according to a predetermined base station type, an air interface time-frequency resource partition configuration corresponding to the base station type;
wherein the base station types include: a level 1 base station …, a level N base station, wherein N is a positive integer which is larger than 1 and is predetermined based on network planning configuration; the level 1 base station is connected with the root base station, is provided with a backhaul device and provides backhaul access service for the adjacent base stations; the root base station is a base station connected with a packet core network, and a backhaul device configured by the level 1 base station is attached to the root base station; the N-level base station is connected with the N-1-level base station and is provided with backhaul equipment, and the backhaul equipment configured by the N-level base station is attached to the N-1-level base station; the air interface time frequency resource is divided and configured into a service resource and a return resource which are divided and configured according to the type of the base station.
In a specific example, the allocation of the air interface time-frequency resource partition to the service resource and the backhaul resource, which is predetermined based on the type of the base station, specifically includes:
the air interface time frequency resource partition configuration is a partition configuration which is predetermined based on a preset interference suppression scheduling rule and divides the air interface time frequency resource into service resources and return resources;
wherein the interference suppression scheduling rule comprises:
the feedback resources of the i-1 level base station and the i level base station are not in the same subframe, and i is more than 1 and less than or equal to N;
the return resources and the service resources of the j-level base station are not in the same subframe, and j is more than or equal to 1 and less than or equal to N.
Compared with the prior art, the base station disclosed in the embodiment adds the backhaul resource adjustment mode, and determines whether to adjust the backhaul resource to the service resource or not by dividing the air interface time-frequency resource into the backhaul resource and the service resource and based on the PRB scheduling rate of each subframe of the previous backhaul scheduling period, thereby improving the cell throughput.
Further, in the base station disclosed in the embodiment, different base station types correspond to different air interface time-frequency resource partition configurations, so that the backhaul resources of different base stations correspond to different subframes, and the problem that the backhaul links of different base stations occupy the same subframe and air interface resources are wasted under the condition that backhaul data is not consistent in the prior art is solved.
Further, in the base station disclosed in the embodiment, the air interface time frequency resource is divided and configured into the division and configuration for dividing the air interface time frequency resource into the service resource and the backhaul resource, which are predetermined based on the preset interference suppression scheduling rule, so that interference of the backhaul device configured by the base station to the base station is greatly suppressed.
Further, for the problem that congestion indiscriminate packet loss, such as loss of signaling or control information, may cause reduction in stability of the LTE system, due to limited wireless backhaul resources and a backhaul link bandwidth being smaller than an air interface bandwidth, the base station disclosed in the embodiment prioritizes backhaul data, thereby ensuring that backhaul data of a high-priority logical channel is preferentially sent.
It will be appreciated by a person skilled in the art that the units of the embodiments may be combined into one unit and furthermore that they may be divided into a plurality of sub-units. All of the features disclosed in this specification, and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification may be replaced by an alternative feature serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
It will be appreciated by a person skilled in the art that the units of the embodiments may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. A method for adjusting wireless backhaul resources, comprising:
the target base station judges whether the current subframe of the current backhaul scheduling period is a subframe corresponding to the backhaul resource based on preset air interface time-frequency resource partition configuration; the air interface time frequency resource division configuration comprises the following steps: the corresponding relation between the sub-frame and the return resource;
if the current subframe of the current feedback scheduling period is a subframe corresponding to the feedback resource and the target base station does not enter the feedback resource adjustment mode, the target base station counts the Physical Resource Block (PRB) scheduling rate of each subframe of the previous feedback scheduling period;
the target base station determines whether to enter a return resource adjustment mode or not based on the PRB scheduling rate of each subframe of the last return scheduling period;
if the return resource adjustment mode is determined to be entered, the target base station adjusts the sub-frame corresponding to the return resource from the sub-frame n-k to the sub-frame n in the air interface time frequency resource allocation to the sub-frame corresponding to the service resource; wherein n and k are preset positive integers, and n is greater than k.
2. The method according to claim 1, wherein said determining whether the current subframe of the current backhaul scheduling period is before the subframe corresponding to the backhaul resource further comprises:
the target base station determines air interface time frequency resource partition configuration corresponding to the base station type according to the predetermined base station type;
wherein the base station types include: a level 1 base station …, a level N base station, wherein N is a positive integer which is larger than 1 and is predetermined based on network planning configuration; the level 1 base station is connected with the root base station, is provided with a backhaul device and provides backhaul access service for the adjacent base stations; the root base station is a base station connected with a packet core network, and a backhaul device configured by the level 1 base station is attached to the root base station; the N-level base station is connected with the N-1-level base station and is provided with backhaul equipment, and the backhaul equipment configured by the N-level base station is attached to the N-1-level base station; the air interface time frequency resource is divided and configured into a service resource and a return resource which are divided and configured according to the type of the base station.
3. The method according to claim 2, wherein the air interface time frequency resource partition configuration is a partition configuration for partitioning air interface time frequency resources into service resources and backhaul resources, which is predetermined based on a base station type, and specifically includes:
the air interface time frequency resource partition configuration is a partition configuration which is predetermined based on a preset interference suppression scheduling rule and divides the air interface time frequency resource into service resources and return resources;
wherein the interference suppression scheduling rule comprises:
the feedback resources of the i-1 level base station and the i level base station are not in the same subframe, and i is more than 1 and less than or equal to N;
the return resources and the service resources of the j-level base station are not in the same subframe, and j is more than or equal to 1 and less than or equal to N.
4. The method of claim 1, wherein the target base station determining whether to enter a backhaul resource adjustment mode based on the PRB scheduling rate of each subframe of the previous backhaul scheduling period comprises:
the target base station judges whether the PRB scheduling rate of each subframe of the previous feedback scheduling period is greater than a preset PRB scheduling rate first threshold or not; if yes, determining to enter a return resource adjusting mode; otherwise, determining not to enter the backhaul resource adjustment mode.
5. The method according to claim 1, wherein said determining whether the current subframe of the current backhaul scheduling period is the subframe corresponding to the backhaul resource further comprises:
if the current subframe of the current feedback scheduling period is a subframe corresponding to the feedback resource and the target base station enters a feedback resource adjustment mode, the target base station counts the PRB scheduling rate of each subframe of the previous feedback scheduling period;
the target base station determines whether to exit a feedback resource adjustment mode or not based on the PRB scheduling rate of each subframe of the previous feedback scheduling period;
and if the target base station determines to exit the return resource adjustment mode, the target base station restores the subframe which is adjusted to the corresponding service resource in the air interface time frequency resource partition configuration to the subframe corresponding to the return resource.
6. The method of claim 5, wherein the target base station determining whether to exit the backhaul resource adjustment mode based on the PRB scheduling rate of each subframe of the previous backhaul scheduling period comprises:
the target base station judges whether a PRB scheduling rate larger than a preset second threshold of the PRB scheduling rate exists in the PRB scheduling rates of all the subframes of the previous feedback scheduling period; if yes, determining to quit the return resource adjustment; otherwise, determining not to exit the backhaul resource adjustment.
7. The method of claim 1, further comprising:
when the target base station acquires uplink or downlink return data, sequencing the acquired return data based on a preset sequencing rule; the ordering rule is as follows:
the first sequence is as follows: the bearer of the backhaul data is SRB 1;
and a second sequence: the bearer of the backhaul data is SRB 2;
the third sequence: the quality of service class identifier QCI of the bearer of the backhaul data is QCI 1;
the fourth order: the QCI of the bearer of the backhaul data is QCI 2;
……
the eleventh order: the QCI of the bearer of the backhaul data is QCI 9.
8. A base station, comprising:
a judging unit, configured to judge whether a current subframe of a current backhaul scheduling period is a subframe corresponding to a backhaul resource based on a preset air interface time-frequency resource partition configuration; the air interface time frequency resource division configuration comprises the following steps: the corresponding relation between the sub-frame and the return resource;
a counting unit, configured to count a physical resource block PRB scheduling rate of each subframe of a previous backhaul scheduling period when the determining unit determines that a current subframe of a current backhaul scheduling period is a subframe corresponding to a backhaul resource and the base station does not enter a backhaul resource adjustment mode;
a determining unit, configured to determine whether to enter a backhaul resource adjustment mode based on a PRB scheduling rate of each subframe of a previous backhaul scheduling period;
an adjusting unit, configured to adjust, when the determining unit determines to enter a backhaul resource adjustment mode, a subframe corresponding to a backhaul resource from a subframe n-k to a subframe n in the air interface time-frequency resource allocation to a subframe corresponding to a service resource; wherein n and k are preset positive integers, and n is greater than k.
9. The base station of claim 8, further comprising:
an air interface time frequency resource partition configuration determining unit, configured to determine, according to a predetermined base station type, an air interface time frequency resource partition configuration corresponding to the base station type;
wherein the base station types include: a level 1 base station …, a level N base station, wherein N is a positive integer which is larger than 1 and is predetermined based on network planning configuration; the level 1 base station is connected with the root base station, is provided with a backhaul device and provides backhaul access service for the adjacent base stations; the root base station is a base station connected with a packet core network, and a backhaul device configured by the level 1 base station is attached to the root base station; the N-level base station is connected with the N-1-level base station and is provided with backhaul equipment, and the backhaul equipment configured by the N-level base station is attached to the N-1-level base station; the air interface time frequency resource is divided and configured into a service resource and a return resource which are divided and configured according to the type of the base station.
10. The base station according to claim 9, wherein the air interface time frequency resource partition configuration is a partition configuration for partitioning air interface time frequency resources into service resources and backhaul resources, which is predetermined based on a base station type, and specifically includes:
the air interface time frequency resource partition configuration is a partition configuration which is predetermined based on a preset interference suppression scheduling rule and divides the air interface time frequency resource into service resources and return resources;
wherein the interference suppression scheduling rule comprises:
the feedback resources of the i-1 level base station and the i level base station are not in the same subframe, and i is more than 1 and less than or equal to N;
the return resources and the service resources of the j-level base station are not in the same subframe, and j is more than or equal to 1 and less than or equal to N.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102137498A (en) * | 2010-01-22 | 2011-07-27 | 电信科学技术研究院 | Method and device for allocating resources in relay system |
| KR20130038784A (en) * | 2011-10-10 | 2013-04-18 | 에릭슨 엘지 주식회사 | Method for transmitting control channel and relay system for the same |
| CN103875297A (en) * | 2011-08-03 | 2014-06-18 | 黑莓有限公司 | Allocating backhaul resources |
| CN104363597A (en) * | 2010-08-24 | 2015-02-18 | 华为技术有限公司 | Frequency spectrum resource allocation adjustment method, device and system |
| CN105992392A (en) * | 2015-01-28 | 2016-10-05 | 北京佰才邦技术有限公司 | Return link establishment method and device |
| CN106452703A (en) * | 2015-08-10 | 2017-02-22 | 普天信息技术有限公司 | Relay return link and access link resource distribution method and relay node |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9237583B2 (en) * | 2010-05-03 | 2016-01-12 | Qualcomm Incorporated | Resource availability for PDSCH in relay backhaul transmissions |
-
2017
- 2017-04-28 CN CN201710294985.7A patent/CN108810902B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102137498A (en) * | 2010-01-22 | 2011-07-27 | 电信科学技术研究院 | Method and device for allocating resources in relay system |
| CN104363597A (en) * | 2010-08-24 | 2015-02-18 | 华为技术有限公司 | Frequency spectrum resource allocation adjustment method, device and system |
| CN103875297A (en) * | 2011-08-03 | 2014-06-18 | 黑莓有限公司 | Allocating backhaul resources |
| KR20130038784A (en) * | 2011-10-10 | 2013-04-18 | 에릭슨 엘지 주식회사 | Method for transmitting control channel and relay system for the same |
| CN105992392A (en) * | 2015-01-28 | 2016-10-05 | 北京佰才邦技术有限公司 | Return link establishment method and device |
| CN106452703A (en) * | 2015-08-10 | 2017-02-22 | 普天信息技术有限公司 | Relay return link and access link resource distribution method and relay node |
Non-Patent Citations (1)
| Title |
|---|
| LTE-Advanced系统中的协作传输技术研究;王卓;《中国优秀硕士学位论文全文数据库》;20110108;全文 * |
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