CN106658736A - LTE technology-based resource allocation method for uplink of internet of things - Google Patents
LTE technology-based resource allocation method for uplink of internet of things Download PDFInfo
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- CN106658736A CN106658736A CN201610939079.3A CN201610939079A CN106658736A CN 106658736 A CN106658736 A CN 106658736A CN 201610939079 A CN201610939079 A CN 201610939079A CN 106658736 A CN106658736 A CN 106658736A
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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
- H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
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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 invention relates to an LTE technology-based resource allocation method for the uplink of an internet of things. The invention provides a solution for realizing the internet of things based on the LTE technology and also provides an allocation method for uplink resources based on QoS. In the resource-poor condition, resources are allocated to delay-sensitive users preferentially, so that the bandwidth requirements of the above users are met. In the resource-rich condition, resources are allocated to users as required according to the actual requirements of the users. On the basis that the QoS is met, the resource utilization rate of the system is maximized.
Description
Technical field
It is particularly a kind of with LTE as backhaul network the present invention relates to a kind of resource allocation methods of wireless communication field
Uplink resource allocating method.
Background technology
With the development of Intellisense, technology of identification and wireless communication technology, the concept that thing thing is connected progressively has goed deep into people
The heart, Internet of Things is also referred to as the third wave of the world information industry development after computer, internet.But current thing
Networking simply couples together many physical objecies, can communicate with each other, data exchange, and realizes all kinds of Monitoring and Controlling work(
Energy. these networks mostly towards real needs, adopt specialized protocol, solve the problems, such as that each network ownership currently pays close attention to.
And realize large-scale thing thing be connected be still Internet of Things development a trend.
Third generation partner program (The 3rd Generation Partnership Project, referred to as 3GPP)
Long Term Evolution (Long Term Evolution, referred to as LTE) system is controlled user by the way of the centralized dispatching of base station and is set
Standby (User Equipment, referred to as UE) Physical Uplink Shared Channel (Physical Uplink Shared Channel,
Referred to as PUSCH) transmission.
The uplink channel resources distribution of LTE system is with Resource Block (Resource Block, referred to as RB) for unit.Resource
Block is used to describe physical channel (Physical Channel) reflecting to Resource Unit (ResourceElement, referred to as RE)
Penetrate.Two spike-type cultivars blocks defined in system：Physical Resource Block (PhysicalResource Block, referred to as PRB) and virtual
Resource Block (Virtual Resource Block, referred to as VRB).One Physical Resource Block PRB is accounted on frequency domainIt is individual continuous
Subcarrier (subcarrier), whereinSubcarrier spacing is 15kHz, i.e., the width of one PRB on frequency domain is
180kHz。
LTE frame lengths are 10ms, and each frame is divided into 10 subframes (subframe) again, and a length of 1ms of each subframe is referred to as passing
Defeated time interval (referred to as TTI) a, PRB accounts for 1 time slot (slot, 0.5ms) in time domain, and a VRB has and PRB phases
Structure together and size.During resource allocation, a pair of VRB on two time slots of a sub- frame in are distributed together.
In LTE system, PUSCH distributes (contiguous resourceallocation) mode using continuous resource, i.e.,
The PUSCH of one UE occupies one section of continuous bandwidth on frequency domain, is a part for whole up-link bandwidth.The resource of LTE
Distribution can be carried out in time domain and frequency domain.In time domain, each TTI carries out first resource distribution；It is based on many on frequency domain
Individual RB is allocated, and width of the RB on frequency domain is 180kHz.Total up RB numbers become with the change of uplink bandwidth
Change, be specifically shown in Table 1.LTE also necessarily becomes the essential core skill for realizing Internet of Things as the core technology of next generation wireless communication
One of art.
The mapping table of the resource block number of table 1 and channel width
| Channel width (MHz) | 1.4 | 3 | 5 | 10 | 15 | 20 |
| RB number NsRB | 6 | 15 | 25 | 50 | 75 | 100 |
With the development of technology of Internet of things, the demand of Internet of Things also constantly increases, but the data pattern of Internet of Things Network Communication and will
Seeking Truth is different from traditional LTE network.Internet of Things Network Communication often has based on the communication of group, relatively low mobility, small data
The features such as amount transmission, low-power consumption.For specific application, the requirement to traffic rate and time delay is also not quite similar.Therefore, entering
During row communication resource distribution, it is necessary to consider that the demand of different user, the service quality (referred to as QoS) for meeting different user will
Ask.
The characteristics of Resource Allocation Formula of existing LTE up-links is not directed to Internet of Things.Internet of Things Network Communication has following
Feature：1st, the user terminal quantity of Internet of Things is very huge, and some terminal nodes are limited due to power supply and communication module,
Directly can not be communicated with eNB；2nd, the data volume of single sensing node transmission is universal less, and little data transfer is often
Cause the utilization rate of Radio Resource not high, and propose to collect the information from sensing node using gateway node and forward, so as to
The utilization rate of raising system；3rd, LTE defines the different classification business of 1-9 kinds (referred to as QCI), but for Internet of Things application comes
Say, number of classifying can reduce on the contrary too much the performance of system.
The content of the invention
The purpose of the present invention is to propose to a kind of Internet of Things uplink resource allocation algorithm based on LTE technologies, is different
Application provide QoS ensure.
In order to achieve the above object, the technical scheme is that and surfed the net there is provided a kind of Internet of Things based on LTE technologies
Link circuit resource distribution method, the Internet of Things adopts the network structure of two-stage, including bottom and core net, wherein, bottom is by each
Class perceive control device be connected composition perception extend network, perceive extend network be connected with core net by gateway node, net
Artis is responsible for collecting the data from perception control device, and passes the data to be located at the base station of core net, and it is special
Levy and be, comprise the following steps：
The different QoS requirement of step 1, definition N kinds, N >=2；
Step 2, in time domain, each Transmission Time Interval is carried out first resource allocation algorithm, base station (eNB) basis
The QoS requirement of user carries out different service to user；On frequency domain, the need submitted to according to each user by base station (eNB)
The resource block number for determining distribution is sought, the resource of distribution is continuous Resource Block, for arbitrary i-th Transmission Time Interval,
Comprise the following steps：
Step 2.1, by available resource block number nRB_avlIt is initialized as NRB；
What step 2.2, gateway node were received according to oneself sends a request from the data flow for perceiving control device
Rate information Rreq_kTo base station；
User is divided into N number of subset according to the QoS requirement from user by step 2.3, base station, all subsets according to
Priority is ranked up；
Step 2.4, i-th Transmission Time Interval of calculating are pre-assigned to the resource block number of each user, wherein, user k
Resource block number be nk, k ∈ { 1 ..., k ... K }, K is total number of users：
LkThe resource set of blocks of user k is distributed in expression, it is assumed that all of NRBUser k is distributed on, then LkFor all of
Resource set of blocks, using formula below speed r that each Resource Block can be provided is calculatedk：
In formula, B represents the bandwidth of each Resource Block；γEff, kEffective signal to noise ratio is represented, |
Lk| the Resource Block cardinality of a set of user k, γ are distributed in expressionK, lSignal to noise ratios of the user k on the 1st Resource Block is represented,pK, lRepresent transmission powers of the user k on the 1st Resource Block, hK, lRepresent user k on the 1st Resource Block
Channel gain, σ2Represent additive white Gaussian noise power；
Then i-th Transmission Time Interval is pre-assigned to the resource block number n of user kk=Rreq_k/rk, and it is calculated use
Family k adds up the resource block number b that need to distributek, bk=bk+nk；
Step 2.5, according to the calculated resource block number for needing to distribute to each user of step 2.4, according to preferential
Level order is followed successively by each the user resource allocation block in N number of subset of step 2.3 determination, useful for the institute in random subset
For family, according to the last service time, sequentially sort, the last service time is earliest, comes foremost.
Preferably, 3 kinds of different QoS requirements defined in the step 1：
The first, need reliable speed and postpone to ensure, with limit priority；
Secondth, the certain speed of needs and delay are ensured, but arrival rate is high without the first, and to the requirement of speed
Less than the first, with the second high priority；
The third, without speed and postpone require, with lowest priority.
Preferably, in the step 2.3, user is divided into 3 subsets：
User of first subset (S1) comprising all the first QoS requirements, with limit priority；
User of the yield in the second subset (S2) comprising all second QoS requirements, with the second high priority；
User of 3rd subset (S3) comprising all the third QoS requirements, with minimum priority.
Preferably, in the step 2.5, all users first distributed in the first subset (S1), for the first subset
(S1) for the user j in, its accumulative resource block number that need to distribute is bjIf, available resource block number nRB_avl＞ bj, then
Distribute continuous bjIndividual Resource Block gives user j；
If available resource block number nRB_avl＞ 0, all users in yield in the second subset of reallocating (S2)；
If available resource block number nRB_avl＞ 0, all users in the 3rd subset (S3) of reallocating.
The present invention propose it is a kind of the solution of Internet of Things is realized based on LTE technologies, and give base in suc scheme
In the distribution method of the uplink resource of QoS.Under conditions of scarcity of resources, delay sensitive class user distribution money is preferentially given
Source, meets the bandwidth demand of such user；In the case of resource abundance, again can be according to the actual demand of user, on demand to each
User resource allocation；On the basis of QoS is met, the resource utilization of system is maximized.
Description of the drawings
Fig. 1 is the network model schematic diagram that the Internet of Things in the present invention is adopted.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than restriction the scope of the present invention.In addition, it is to be understood that after the content for having read instruction of the present invention, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
As shown in figure 1, the Internet of Things in the present invention is the network structure of a two-stage.Wherein, bottom is by all kinds of perception
Control device (referred to as IoTD), such as RFID, GPS, video monitoring system, the perception of the connected composition of all types of sensors extend
Network.Perceive extension network to be connected with core net by gateway node (referred to as IoTG).IoTG is responsible for collecting from IoTD's
Data, and the data are sent to base station (referred to as eNB).
Invention also defines three kinds of different QoS demands：
class1：Need reliable speed and postpone to ensure, the arrival rate of this class data is often very high；
class2：Need certain speed and postpone to ensure, but arrival rate is high without class1, and to the requirement of speed
Less than class1；
class3：Require without speed and delay.
In time domain, each TTI is carried out first resource allocation algorithm, and eNB enters according to the QoS demand of user to user
Row different service.Class1 has highest priority；Class2 takes second place；The priority of class3 is minimum.On frequency domain, by
ENB determines the RB numbers of distribution according to the demand that each user submits to.The resource of distribution is continuous RB.
For arbitrary i-th TTI, following algorithm is performed：
Step 1, by available resource block number nRB_avlIt is initialized as NRB。
The data flow from IoTD that step 2, IoTG are received according to oneself sends request rate information Rreq_kGive
eNB。
User is divided into 3 subsets by step 3, eNB according to the QoS demand from user：S1、S2、S3.Wherein S1 includes
All priority are the user of class1, and S2 includes user of all priority for class2, and S3 is including all priority
The user of class 3.
Step 4, i-th TTI of calculating are pre-assigned to the resource block number of each user, wherein, the resource block number of user k
For nk, k ∈ { 1 ..., k ... K }, K is total number of users：
LkThe resource set of blocks of user k is distributed in expression, it is assumed that all of NRBUser k is distributed on, then LkFor all of
Resource set of blocks, using formula below speed r that each Resource Block can be provided is calculatedk：
In formula, B represents the bandwidth of each Resource Block；γEff, kEffective signal to noise ratio is represented, |
Lk| the Resource Block cardinality of a set of user k, γ are distributed in expressionK, lSignal to noise ratios of the user k on the 1st Resource Block is represented,pK, lRepresent transmission powers of the user k on the 1st Resource Block, hK, lRepresent user k on the 1st Resource Block
Channel gain, σ2Represent additive white Gaussian noise power；
Then i-th Transmission Time Interval is pre-assigned to the resource block number n of user kk=Rreq_k/rk, and it is calculated use
Family k adds up the resource block number b that need to distributek, bk=bk+nk；
Step 5, according to the calculated resource block number for needing to distribute to each user of step 4, it is suitable according to priority
Sequence is followed successively by each the user resource allocation block in 3 subsets of step 2 determination, for all users in random subset
Speech, according to the last service time, sequentially sorts, and the last service time is earliest, comes foremost.
The all users first distributed in the first subset S1, for the user j in the first subset S1, it adds up to need distribution
Resource block number be bjIf, available resource block number nRB_avl＞ bj, then continuous b is distributedjIndividual Resource Block gives user j；
If available resource block number nRB_avl＞ 0, all users in yield in the second subset S2 of reallocating；
If available resource block number nRB_avl＞ 0, all users in the 3rd subset S3 of reallocating.
The present invention constitutes backhaul network using LTE, and different sensing networks is interconnected, will be independent by LTE technologies
Sensing network and backbone network be connected, realize Internet of Things；The present invention sets up the data between sensing node and eNB using gateway node
Transmission, sensing node first sends the data to corresponding gateway node, then forwards the data to eNB by gateway node.The present invention
The gateway node of correlation need to be only designed, in gateway node different interfaces are realized, be realized respectively logical with sensing node and eNB
Letter, can realize interconnecting existing diversified sensing network and LTE network, be easy to integrate existing sensing network technology；According to
The application characteristic of sensing network, defines delay sensitive, and time delay is general sensitive and without three kinds of QoS demands of delay requirement, solves
Different classification business QCI of LTE9 kinds number of classifying for Internet of Things application can reduce on the contrary too much systematic function and ask
Topic.The present invention can also be integrated with existing LTE classification business QCI by mapping.Present invention basis based on more than, devises base
In the uplink resource dispatching algorithm of QoS, under conditions of scarcity of resources, delay sensitive class user resource allocation is preferentially given,
Meet the bandwidth demand of such user；In the case of resource abundance, again can be according to the actual demand of user, on demand to each user
Distribution resource；On the basis of QoS is met, the resource utilization of system is maximized.
Claims (4)
1. a kind of Internet of Things method for distributing uplink resource based on LTE technologies, the Internet of Things using two-stage network structure,
Including bottom and core net, wherein, bottom is the perception extension network for constituting that is connected by all kinds of perception control devices (IoTD), is felt
Know that extension network is connected by gateway node (IoTG) with core net, gateway node (IoTG) is responsible for collection and is set from control is perceived
The data of standby (IoTD), and pass the data to be located at the base station (eNB) of core net, it is characterised in that including following step
Suddenly：
The different QoS requirement of step 1, definition N kinds, N >=2；
Step 2, in time domain, each Transmission Time Interval is carried out first resource allocation algorithm, and base station (eNB) is according to user
QoS requirement different service is carried out to user；It is true according to the demand that each user submits to by base station (eNB) on frequency domain
The resource block number of fixed distribution, the resource of distribution is continuous Resource Block, for arbitrary i-th Transmission Time Interval, including
Following steps：
Step 2.1, by available resource block number nRB_avlIt is initialized as NRB；
What step 2.2, gateway node (IoTG) were received according to oneself sends from the data flow for perceiving control device (IoTD)
One request rate information Rreq_kGive base station (eNB)；
User is divided into N number of subset by step 2.3, base station (eNB) according to the QoS requirement from user, and all subsets are pressed
It is ranked up according to priority；
Step 2.4, i-th Transmission Time Interval of calculating are pre-assigned to the resource block number of each user, wherein, the money of user k
Source block number is nk, k ∈ { 1 ..., k ... K }, K is total number of users：
LkThe resource set of blocks of user k is distributed in expression, it is assumed that all of NRBUser k is distributed on, then LkFor all of Resource Block
Set, using formula below speed r that each Resource Block can be provided is calculatedk：
In formula, B represents the bandwidth of each Resource Block；γEff, kEffective signal to noise ratio is represented, |Lk| table
Show the Resource Block cardinality of a set for distributing to user k, γK, lSignal to noise ratios of the user k on the 1st Resource Block is represented,pK, lRepresent transmission powers of the user k on the 1st Resource Block, hK, lRepresent user k on the 1st Resource Block
Channel gain, σ2Represent additive white Gaussian noise power；
Then i-th Transmission Time Interval is pre-assigned to the resource block number n of user kk=Rreq_k/rk, and it is tired to be calculated user k
The resource block number b that meter need to distributek, bk=bk+nk；
Step 2.5, according to the calculated resource block number for needing to distribute to each user of step 2.4, it is suitable according to priority
Sequence is followed successively by each the user resource allocation block in N number of subset of step 2.3 determination, for all users in random subset
Speech, according to the last service time, sequentially sorts, and the last service time is earliest, comes foremost.
2. a kind of Internet of Things method for distributing uplink resource based on LTE technologies as claimed in claim 1, its feature exists
In 3 kinds of different QoS requirements defined in the step 1：
The first, need reliable speed and postpone to ensure, with limit priority；
Secondth, the certain speed of needs and delay are ensured, but arrival rate is high without the first, and the requirement to speed is less than
The first, with the second high priority；
The third, without speed and postpone require, with lowest priority.
3. a kind of Internet of Things method for distributing uplink resource based on LTE technologies as claimed in claim 2, its feature exists
In in the step 2.3, user being divided into 3 subsets：
User of first subset (S1) comprising all the first QoS requirements, with limit priority；
User of the yield in the second subset (S2) comprising all second QoS requirements, with the second high priority；
User of 3rd subset (S3) comprising all the third QoS requirements, with minimum priority.
4. a kind of Internet of Things method for distributing uplink resource based on LTE technologies as claimed in claim 3, its feature exists
In, in the step 2.5, all users first distributed in the first subset (S1), for the user j in the first subset (S1)
Speech, its accumulative resource block number that need to distribute is bjIf, available resource block number nRB_avl＞ bj, then continuous b is distributedjIndividual money
Source block gives user j；
If available resource block number nRB_avl＞ 0, all users in yield in the second subset of reallocating (S2)；
If available resource block number nRB_avl＞ 0, all users in the 3rd subset (S3) of reallocating.
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| CN107949058A (en) * | 2017-11-10 | 2018-04-20 | 北京邮电大学 | A kind of arrowband Internet of Things accidental access method and device |
| CN110248417A (en) * | 2019-06-19 | 2019-09-17 | 全球能源互联网研究院有限公司 | The resource allocation methods and system of uplink communication business in a kind of electric power Internet of Things |
| WO2020035045A1 (en) * | 2018-08-16 | 2020-02-20 | 电信科学技术研究院有限公司 | Sidelink resource allocation method and terminal |
| WO2020062175A1 (en) * | 2018-09-29 | 2020-04-02 | Orange | Discovery of internet-of-things resources |
| CN111935223A (en) * | 2020-07-08 | 2020-11-13 | 吴静昱 | Internet of things equipment processing method based on 5G and cloud computing center |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107949058A (en) * | 2017-11-10 | 2018-04-20 | 北京邮电大学 | A kind of arrowband Internet of Things accidental access method and device |
| CN107949058B (en) * | 2017-11-10 | 2020-07-17 | 北京邮电大学 | Random access method and device for narrowband Internet of things |
| WO2020035045A1 (en) * | 2018-08-16 | 2020-02-20 | 电信科学技术研究院有限公司 | Sidelink resource allocation method and terminal |
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| WO2020062175A1 (en) * | 2018-09-29 | 2020-04-02 | Orange | Discovery of internet-of-things resources |
| CN110248417A (en) * | 2019-06-19 | 2019-09-17 | 全球能源互联网研究院有限公司 | The resource allocation methods and system of uplink communication business in a kind of electric power Internet of Things |
| CN111935223A (en) * | 2020-07-08 | 2020-11-13 | 吴静昱 | Internet of things equipment processing method based on 5G and cloud computing center |
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