CN106131897A - Isomery cellular network switching and selecting method that a kind of terminaloriented is energy-conservation and system - Google Patents

Isomery cellular network switching and selecting method that a kind of terminaloriented is energy-conservation and system Download PDF

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Publication number
CN106131897A
CN106131897A CN201610444737.1A CN201610444737A CN106131897A CN 106131897 A CN106131897 A CN 106131897A CN 201610444737 A CN201610444737 A CN 201610444737A CN 106131897 A CN106131897 A CN 106131897A
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base station
terminal
power
serving
candidate
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CN106131897B (en
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高振翔
邵旭龙
周卫华
汪永明
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Institute of Information Engineering of CAS
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention provides the isomery cellular network switching and selecting method that a kind of terminaloriented is energy-conservation, step includes: 1) signal intensity of serving BS and adjacent base station is measured by terminal according to measurement rules, when handover trigger event occurs, to serving base stations report measurement report, this measurement report includes the signal intensity of candidate base station；2) serving BS obtains transmitting power and the interference noise power of candidate base station to adjacent base station requests；3) according to transmitting power and the interference noise power of the minimum Signal to Interference plus Noise Ratio of channel, the signal intensity of described candidate base station and the candidate base station pre-set, obtain connecting the terminal transmission power of candidate base station；4) according to the switchover policy containing above-mentioned terminal transmission power, from candidate base station, targeted handoff base station is selected.The present invention also provides for the isomery cellular network switching selection system that a kind of terminaloriented is energy-conservation.

Description

Isomery cellular network switching and selecting method that a kind of terminaloriented is energy-conservation and system
Technical field
The invention belongs to the mobile management field of wireless cellular network, relate to the community switching of super-intensive heterogeneous network, Particularly relate to the energy-conservation isomery cellular network switching and selecting method of a kind of terminaloriented and system.
Background technology
Along with the fast development of mobile Internet and popularizing of mobile terminal, the business datum flow of mobile network presents How the trend of exponential increase, meet the data traffic demand of user's rapid growth, it has also become telecom operators are faced One of big challenge.
Isomery cellular network arises at the historic moment, and it can improve network traffic data further, meets use to a certain extent Family demand.Isomery cellular network refers to, in the range of macro base station covers, introduce other communication modes, strengthen spy targetedly Determine the covering in region, form a kind of network structure that two-layer covers, promote the availability of frequency spectrum with by cell splitting compared with, isomery Cellular network networking is flexible, and maintenance cost is cheap, thus of great interest.The form of isomery cellular network is abundant many Sample, had both included introducing mini site based on cellular communication standard, such as relay, Pico cell website and Home eNodeB Deng；Also including that the reinforcement of other communication standards covers, such as WLAN, Ad hoc network is direct-connected with user to communicate.? In the vision of five third generation mobile communication networks, especially with super-intensive isomery cellular network, utilize its network design and height flexibly The spectrum reuse of effect, improves capacity of communication system further.
Although super-intensive isomery cellular network solves the capacity requirement of future network, but therefore forms big of coverage The long-pending cellular cell reduced, certainly will increase the probability that user goes offline by bringing community switching the most frequently, reduces communication system Service ability；On the other hand, the access node of high-density deployment will be dramatically increased co-channel interference.In terms of end side, when When up channel is by strengthening from the interference of adjacent user, terminal increases its transmitting power to meet the letter of up channel by being forced Make an uproar ratio, increase terminal transmission power and certainly will consume terminal electricity greatly.It addition, existing network switching selecting party Method, many handoff algorithms recommended according to 3GPP, simply use the decision-making that the signal intensity of candidate base station selects as community switching Attribute, chooses the base station of signal intensity maximum in candidate base station and, as handover-target base station, does not consider terminal energy consumption, Fail to realize terminal energy-conservation.In order to ensure use time and the stand-by time of mobile terminal, terminal communication uses energy-conservation skill Art is particularly important.
Summary of the invention
For overcoming above-mentioned deficiency, the present invention provide the energy-conservation isomery cellular network switching and selecting method of a kind of terminaloriented and System, it is possible to less co-channel interference, reduces the probability that user goes offline, and reduces terminal energy on the premise of insuring telecommunication service quality Consumption.
For reaching above-mentioned purpose, the present invention provides following technical scheme:
The isomery cellular network switching and selecting method that a kind of terminaloriented is energy-conservation, applies in following super-intensive isomery Cellular Networks In network, the energy consumption produced during reducing terminal communication, step includes:
1) signal intensity of serving BS and adjacent base station is measured, when handover trigger thing by terminal according to measurement rules When part occurs, to serving base stations report measurement report, this measurement report includes the signal intensity of candidate base station；
2) serving BS obtains transmitting power and the interference noise power of candidate base station to adjacent base station requests；
3) according to the minimum Signal to Interference plus Noise Ratio of channel, the signal intensity of described candidate base station and the candidate base station pre-set Launch power and interference noise power, obtain connecting the terminal transmission power of candidate base station；
4) according to the switchover policy containing above-mentioned terminal transmission power, from candidate base station, targeted handoff base station is selected.
Further, described measurement rules comes from serving BS, configures when serving BS starts.
Further, described measurement report also includes the interference noise power of candidate base station place frequency range.
Further, serving BS launches power and interference noise power to what adjacent base station requests obtained candidate base station Method is, by the Report Characteristics field of RESOURCE STATUS related signaling in amendment X2AP agreement, Obtain from base-station interface.
Further, communicated by X2 interface between described base station.
Further, described switchover policy institute containing parameter also includes that the Signal to Interference plus Noise Ratio of candidate base station down channel and base station are born Carry.
Further, described in the minimum Signal to Interference plus Noise Ratio of channel that pre-sets be 3dB, when higher than this value, receiving terminal ability Reconcile out correct signal.
The present invention also provides for the isomery cellular network switching selection system that a kind of terminaloriented is energy-conservation, including: handoff parameter Administrative unit, terminal measuring unit, adjacent base station state information management unit, base station switching performance element and mobile management list Unit, wherein,
Handoff parameter administrative unit: be responsible for configuration and the initialization of switching-related parameters；
Terminal measuring unit: be connected to above-mentioned handoff parameter administrative unit, responsible measurement serving BS and adjacent base station Correlation behavior parameter；
Base station switching performance element: be connected to above-mentioned terminal measuring unit, is responsible for screening targeted handoff base station；
Adjacent base station state information management unit: be connected to above-mentioned base station switching performance element, be responsible for the shape of adjacent base station State information；
Mobile management unit: be connected to above-mentioned base station switching performance element, be responsible for terminal is switched to targeted handoff base station.
Further, base station is set up with terminal when being initially connected, and switching-related parameters is sent to terminal measuring unit.
Further, switching performance element in described base station includes communication interface modules, the handover decisions attribute interconnected Computing module and targeted handoff base station screening module, wherein,
Communication interface modules: be responsible for the communication between unit；
Handover decisions property calculation module: be responsible for computing terminal and launch power；
Targeted handoff base station screening module: be responsible for the screening of target BS.
Further, the status information of described adjacent base station include adjacent base station launch power and that adjacent base station detects is dry Disturb noise power.
The invention has the beneficial effects as follows, utilize the candidate base station status information that serving BS X2 interface obtains, and combine end The measurement report that end reports is to weigh terminal transmission power.Use terminal transmission power as a judge of handover decisions simultaneously Index, is evaluated candidate cell, and the lower-powered community of prioritizing selection terminal transmission is accessed.The present invention is according to pre-setting Minimum Signal to Interference plus Noise Ratio can effectively reduce the outage probability of user, it is ensured that good telecommunication service quality, put before this, reduce The transmitting power of terminal, thus reduce terminal energy consumption.Current hand off signaling system is changed less by the present invention, has good Good compatibility.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the energy-conservation isomery cellular network switching and selecting method of a kind of terminaloriented.
Fig. 2 be a kind of terminaloriented energy-conservation isomery cellular network switching selection system structural representation.
Fig. 3 is switching performance element structural representation.
Fig. 4 is a kind of network architecture schematic diagram of embodiment.
Fig. 5 is that the flow process of the energy-conservation isomery cellular network switching and selecting method of a kind of terminaloriented of embodiment and system is shown It is intended to.
Fig. 6 is the switching and selecting method simulation result comparison diagram of embodiment and the handoff algorithms recommended according to 3GPP.
Fig. 7 is that the RESOURCE STATUS signaling of embodiment transmits schematic diagram.
Fig. 8 is the transmitting power obtaining adjacent base station and the flow chart of interference noise power of embodiment.
Fig. 9 is the Report Characteristics field schematic diagram of embodiment.
Detailed description of the invention
Features described above and advantage for making the present invention can become apparent, special embodiment below, and coordinate institute's accompanying drawing to make Describe in detail as follows.It should be noted that specific embodiments described below is only applicable to illustrate the present invention, not in order to limit The present invention.
The present invention provides the isomery cellular network switching and selecting method that a kind of terminaloriented is energy-conservation, its step as it is shown in figure 1, Including:
Step S1: measurement report is measured and uploaded to terminal: terminal according to measurement rules to serving BS and adjacent base station Signal intensity measures, and when handover trigger event occurs, to serving base stations report measurement report, this measurement report includes waiting Select the signal intensity of base station.
Step S2: obtain candidate base station status information: serving BS obtains the transmitting merit of candidate base station to adjacent base station requests Rate and interference noise power.
Step S3: power launched by computing terminal: according to the channel pre-set minimum Signal to Interference plus Noise Ratio, described candidate base station The transmitting power of signal intensity and candidate base station and interference noise power, calculate the terminal transmission power connecting candidate base station. When Signal to Interference plus Noise Ratio is less than certain value, receiving terminal will be unable to demodulate correct signal, and this value is the above-mentioned letter pre-set The minimum Signal to Interference plus Noise Ratio in road, this value can be the 3dB that 3GPP recommends.
Step S4: screening targeted handoff base station: using terminal transmission power as one of parameter of switchover policy, from candidate's base Targeted handoff base station is selected in standing.
Correspondingly, the isomery cellular network switching selection system that a kind of terminaloriented is energy-conservation, its structural representation are also provided for As shown in Figure 2.
Handoff parameter administrative unit: being responsible for configuration and the initialization of switching-related parameters, described parameter includes handover trigger Relevant parameter, measurement rules.
Terminal measuring unit: be connected to above-mentioned handoff parameter administrative unit, base station is set up with terminal when being initially connected, will be cut Change triggering relevant parameter and measurement rules is sent to terminal measuring unit, according to measurement rules, to serving BS and adjacent base The correlation behavior parameter stood measures, and generates measurement report, and is sent to base station switching performance element.
Base station switching performance element: be connected to above-mentioned terminal measuring unit, be responsible for the process of above-mentioned measurement report, Hou Xuanji Stand the calculating of decision attribute and the screening of targeted handoff base station, generate handover request according to the targeted handoff base station filtered out, It is sent to mobile management unit.
Adjacent base station state information management unit: be connected to above-mentioned base station switching performance element, be responsible for the shape of adjacent base station State information, what this status information included adjacent base station launches power and interference noise power that adjacent base station detects.
Mobile management unit: be connected to above-mentioned base station switching performance element, is responsible for processing the handover request of serving BS, and Terminal is switched to targeted handoff base station.
Wherein, the structure of base station switching performance element is as it is shown on figure 3, by communication interface modules, handover decisions property calculation Module and targeted handoff base station screening module three are connected with each other composition:
Communication interface modules: be responsible for the communication between described terminal measuring unit and mobile management unit.
Handover decisions property calculation module: be responsible for the calculating of candidate base station handover decisions attribute, measures according to terminal The measurement report that unit sends, and adjacent base station state information management module acquisition candidate base station status information, computing terminal is sent out Penetrate power.
Targeted handoff base station screening module: mainly complete the screening of target BS, and generate handover request, by communication interface Module is sent to mobile management unit.
In conjunction with said method and system, an embodiment being applied to concrete condition is now provided, is mainly directed towards macro base station with micro- The isomery cellular network of base station, the network architecture as shown in Figure 4, in macro base station Macro BS coverage, disposes femto base station Pico BS low power nodes, is formed multi-level isomery cellular network, is communicated by X2 interface between adjacent base station.At this In embodiment, switchover policy institute containing parameter, in addition to including terminal transmission power, also includes that the letter of candidate base station down channel is done Make an uproar ratio, weigh screening according to carrying out both this.Its flow process is as it is shown in figure 5, include:
Step 101: the configuration of handoff parameter administrative unit and initialization.One switching parameter management list is set in each base station Unit, configures relevant parameter when base station initiated, and wherein, this parameter mainly includes handover trigger relevant parameter, measurement rules etc., should Measurement rules needs terminal to report serving BS and the signal strength measurement of adjacent base station, and the adjacent base station institute that terminal detects Interference noise power in frequency range.
Step 102: the handoff parameter administrative unit of serving BS sends handover trigger relevant parameter to terminal measuring unit And measurement rules.
Step 103: the signal intensity of serving BS and adjacent base station is entered by terminal measuring unit according to described measurement rules Row is measured.When handover trigger event occurs, measurement report is reported to the switching of serving BS and performs list by terminal measuring unit Unit, wherein, measurement report includes the signal intensity RSRP of candidate base stationdlC the interference of () and candidate base station place frequency range is made an uproar Acoustical power Itot(u)。
Step 104: calculate the Signal to Interference plus Noise Ratio of candidate base station down channel.Handover decisions property calculation module is connect by communication After mouth die block receives measurement report, the Signal to Interference plus Noise Ratio of calculating candidate base station down channel:
SINR d l = RSRR d l ( c ) I t o t ( u )
Step 105: computing terminal connects the transmitting power of candidate base station.Handover decisions property calculation module is connect by communication Mouth die block, reads the candidate base station status information in adjacent base station state information management unit, obtains the transmitting power of candidate base station Pc(c) and interference noise power Itot(u), and calculate the terminal transmission power connecting candidate base station, take sending out in the unit interval Penetrating power average value as average emitted power, this terminal transmission rating formula is:
P u ( c ) = P c ( c ) · SINR t h · I t o t ( c ) RSRP d l ( c )
Wherein, SINRthFor the minimum Signal to Interference plus Noise Ratio threshold value in communication process, set in advance in handoff parameter administrative unit Putting, when less than threshold value, receiving terminal will be unable to demodulate correct signal, and the setting of this threshold value can refer to what 3GPP recommended 3dB。
Step 106: screening targeted handoff base station.The candidate base station that step 104 is obtained by target BS screening module is descending The terminal transmission power that the Signal to Interference plus Noise Ratio of channel and step 105 obtain, as two judgment criteria of handover decisions, filters out Targeted handoff base station, and generate handover request, it is sent to mobile management unit by communication interface modules.
Step 107: carry out the associative operation such as state transfer and terminal access.
Fig. 6 is the simulation result comparison diagram of the present embodiment and the switching and selecting method of the handoff algorithms recommended according to 3GPP, The present embodiment is using use terminal often to consume bit number that erg-ten transmitted as the evaluation criteria of efficiency.Vertical coordinate is terminal energy Effect (Mean UEEnergy Efficiency (bit/Joule)), abscissa is base station density (Number ofsublayer- Cells), the quantity of the femto base station in i.e. one macro base station coverage.EE-HO curve is the switching and selecting method of the present invention Simulation result curve, SC-HO curve is the simulation result curve of switching and selecting method of the handoff algorithms recommended according to 3GPP. It can be seen that along with the increase of base station density, the terminal efficiency in the present embodiment is significantly higher than according to 3GPP recommendation The switching and selecting method of handoff algorithms, fully demonstrates the energy-conservation effectiveness of terminal of the present invention.
In the present embodiment, propose a kind of to obtain adjacent base station transmitting power and the implementation of interference noise power.Logical Cross the Report Characteristics field of RESOURCE STATUS related signaling in amendment X2AP agreement, realize clothes Business base station obtains transmitting power and the interference noise power of adjacent base station by X2 interface, and Fig. 7 is that its signaling transmits schematic diagram, figure 8 is its flow chart, and this flow process includes:
Step 201: serving BS sends RESOURCE STATUS REQUEST message to adjacent base station.Wherein, such as Fig. 9 institute Show, front 7 bits of Report Characteristics field and 3GPP in RESOURCE STATUS REQUEST message Described in TS 36.423 consistent, the 8th bit and the 9th bit average are that 1 (this field totally 32 bit, other bits will be received End is ignored), ask transmitting power and the interference noise power of adjacent base station.
Step 202: adjacent base station returns RESOURCE STATUS RESPONSE message, wherein comprises in REQUEST message Institute's required parameter can detect the parameter of return.In the present embodiment, the Measurement of RESPONSE message Initiation Result field is added base station transmitting power and interference noise power, remainder and 3GPP TS 36.423 described unanimously.
Step 203: the adjacent base station state information of serving BS storage, after serving BS receives RESPONSE message, reads Adjacent base station state information, and stored to adjacent base station state information management unit.
Step 204: adjacent base station periodically sends RESOURCE STATUS UPDATE message.Set according in REQUEST message Fixed report frequency, adjacent base station periodically sends RESOURCE STATUS UPDATE message, wherein comprises step to serving BS The parameter value asked in 201.In the present embodiment, the Cell Measurement Result field of UPDATE message adds Adding base station transmitting power and interference noise power, remainder is consistent with described in 3GPP TS 36.423.
Step 205: serving BS updates adjacent base station state information.After serving BS receives UPDATE message, update neighbour Adjacent base station state information in base station state information management unit.
It is last it should be noted that, embodiments described above is to be given for the example of the present invention, only in order to explain Stating technical scheme and be not limited, those of ordinary skill in the field can be to set forth in the present invention Embodiment is modified or replaces, without departing from the spirit and scope of the present invention.

Claims (10)

1. the isomery cellular network switching and selecting method that terminaloriented is energy-conservation, step includes:
1) signal intensity of serving BS and adjacent base station is measured, when handover trigger event is sent out by terminal according to measurement rules Time raw, to serving base stations report measurement report, this measurement report includes the signal intensity of candidate base station；
2) serving BS obtains transmitting power and the interference noise power of candidate base station to adjacent base station requests；
3) according to the minimum Signal to Interference plus Noise Ratio of channel, the signal intensity of described candidate base station and the transmitting of candidate base station pre-set Power and interference noise power, obtain connecting the terminal transmission power of candidate base station；
4) according to the switchover policy containing above-mentioned terminal transmission power, from candidate base station, targeted handoff base station is selected.
Method the most according to claim 1, it is characterised in that described measurement rules comes from serving BS, when service base Stand and configure when starting.
Method the most according to claim 1, it is characterised in that described measurement report also includes candidate base station place frequency range Interference noise power.
Method the most according to claim 1, it is characterised in that serving BS obtains sending out of candidate base station to adjacent base station requests The method penetrating power and interference noise power is, by RESOURCE STATUS related signaling in amendment X2AP agreement Report Characteristics field, obtains from base-station interface.
Method the most according to claim 1, it is characterised in that communicated by X2 interface between described base station.
Method the most according to claim 1, it is characterised in that described switchover policy institute containing parameter also includes under candidate base station The Signal to Interference plus Noise Ratio of row channel and load of base station.
7. the isomery cellular network switching selection system that terminaloriented is energy-conservation, including: handoff parameter administrative unit, terminal are surveyed Amount unit, adjacent base station state information management unit, base station switching performance element and mobile management unit, wherein,
Handoff parameter administrative unit: be responsible for configuration and the initialization of switching-related parameters；
Being correlated with of terminal measuring unit: be connected to above-mentioned handoff parameter administrative unit, responsible measurement serving BS and adjacent base station State parameter；
Base station switching performance element: be connected to above-mentioned terminal measuring unit, is responsible for screening targeted handoff base station；
Adjacent base station state information management unit: be connected to above-mentioned base station switching performance element, is responsible for the state letter of adjacent base station Breath；
Mobile management unit: be connected to above-mentioned base station switching performance element, be responsible for terminal is switched to targeted handoff base station.
System the most according to claim 7, it is characterised in that base station is set up with terminal when being initially connected, and switching is correlated with Parameter is sent to terminal measuring unit.
System the most according to claim 7, it is characterised in that described base station switching performance element includes that interconnect leads to Letter interface module, handover decisions property calculation module and targeted handoff base station screening module, wherein,
Communication interface modules: be responsible for the communication between unit；
Handover decisions property calculation module: be responsible for computing terminal and launch power；
Targeted handoff base station screening module: be responsible for the screening of target BS.
System the most according to claim 7, it is characterised in that the status information of described adjacent base station includes sending out of adjacent base station Penetrate power and interference noise power that adjacent base station detects.
CN201610444737.1A 2016-06-20 2016-06-20 A kind of energy-efficient isomery cellular network switching and selecting method of terminaloriented and system Expired - Fee Related CN106131897B (en)

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CN110662264A (en) * 2018-06-28 2020-01-07 中国电信股份有限公司 Switching method, system, core network device and computer readable storage medium

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