CN103581981A - Wireless channel simulation method and device - Google Patents
Wireless channel simulation method and device Download PDFInfo
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- CN103581981A CN103581981A CN201210257655.8A CN201210257655A CN103581981A CN 103581981 A CN103581981 A CN 103581981A CN 201210257655 A CN201210257655 A CN 201210257655A CN 103581981 A CN103581981 A CN 103581981A
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Abstract
The embodiment of the invention discloses a wireless channel simulation method and device. The wireless channel simulation method comprises the steps of obtaining up-link and down-link service data packages, pre-judging the wireless empty state of each user in the simulation continuous process according to a state transfer mechanism and the arrival time of the obtained up-link and down-link service data packages, carrying out time slot driving simulation on a forward control channel, a reverse access channel and a forward and reverse service channel according to the pre-judging result, and counting each time slot in the dynamic simulation process to obtain key propriety indexes of the corresponding service channel and the control channel. The wireless channel simulation method can carry out performance evaluation on the reverse access channel and the forward control channel of a multi-user mixed service under a single base station condition and a networking condition, and enables simulation of the service and signaling of a wireless network to be largely similar to the network conditions of an actual mobile communication system, thereby being capable of efficiently guiding the network scheduling and optimization work of the mobile communication system.
Description
Technical field
The present invention relates to mobile communication technology field, especially, relate to a kind of wireless channel simulation method and device.
Background technology
In mobile communication system, the logic channel of air interface is generally divided into Traffic Channel and control channel.The voice-and-data of the main transmission user of Traffic Channel, the main transmission system message of control channel and signaling message, as the message such as the connection foundation of Traffic Channel and Connection Release all complete on control channel.
Traditional mobile communication performance simulation of eating dishes without rice or wine is mainly to carry out performance simulation for the Traffic Channel of eating dishes without rice or wine.Input is generally abstract business model, by the modeling of Traffic Channel being exported to the Mean Speed of each CU Traffic Channel and total throughout etc.In this type of emulation, front backward channel independently carries out, and user takies Traffic Channel constantly in simulation process.
Yet inventor finds, along with the development of mobile Internet business, the characteristic performance of all kinds of business is different, the performance impact of network is also not quite similar, for example, the low discharge line service of being everlasting can connect frequently and sets up and Connection Release, and the capacity bottleneck of system may occur on control channel.Therefore, in system-level emulation, increase the Performance Evaluation to control channel, especially, for mixing the multiple services Performance Evaluation of multi-user and analysis, the work such as the network planning, optimization are had to sizable meaning.
In sum, there is following problem in traditional simulation method:
First, conventional method is only carried out emulation to Traffic Channel, and reckoning without control channel may be also the bottleneck that affects power system capacity;
Secondly, when Traffic Channel is carried out to emulation, only consider that user continues to take the situation of Traffic Channel, and do not consider that more high frequency time small-flow service causes a large number of users alternately to take the situation of Traffic Channel, causes the emulation of Traffic Channel and actual system behavior difference larger;
The 3rd, when Traffic Channel is carried out to emulation, front reverse link is separated to emulation, will cause grasping the state transitions situation of each user in simulation process, therefore cannot carry out the performance simulation of control channel.
Summary of the invention
The technical problem that the embodiment of the present invention will solve is to provide a kind of wireless channel simulation method and device, can carry out to the multi-user mixed services under single base station or in network environment the performance simulation of forward control channel, to instruct the network planning and optimization of mobile communication system.
The embodiment of the present invention provides a kind of wireless channel simulation method, comprises and obtains up-downgoing business data packet; According to state transitions mechanism and the time of advent of the up-downgoing business data packet of obtaining the radio open state of each user in emulation time-continuing process being carried out to anticipation; According to anticipation result, forward control channel, Reverse Access Channel and front reverse traffic channel are carried out to time slot driving simulation; Each time slot in dynamic simulation is added up, to obtain the Key Performance Indicator of corresponding service channel and control channel.
The embodiment of the present invention also provides a kind of wireless channel simulation device, comprises business datum acquiring unit, for obtaining up-downgoing business data packet; The state anticipation unit of eating dishes without rice or wine, for according to the time of advent of state transitions mechanism and the up-downgoing business data packet obtained each user's of emulation time-continuing process radio open state being carried out to anticipation; Time slot driving simulation unit, for carrying out time slot driving simulation according to anticipation result to forward control channel, Reverse Access Channel and front reverse traffic channel; Performance index statistic unit, for adding up each time slot in dynamic simulation, to obtain the Key Performance Indicator of corresponding service channel and control channel.
The wireless channel simulation method that the embodiment of the present invention provides and device, according to state transitions mechanism and the up-downgoing business data packet that is input to emulation platform, the time of advent connection status of eating dishes without rice or wine is carried out to anticipation, then the connection status of eating dishes without rice or wine going out according to anticipation is carried out time slot driving simulation to front reverse traffic channel, forward control channel and Reverse Access Channel, according to simulation scenarios, add up and export again corresponding KPI(Key Performance Indicators, critical performance parameters).The embodiment of the present invention can be carried out to the multi-user mixed services under single base station and under networking condition the Performance Evaluation of Reverse Access Channel and forward control channel, the business of wireless network and the network condition that signaling performance simulation approaches actual mobile communication system dramatically can be made, thereby the network planning and optimization work of mobile communication system can be instructed more efficiently.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part.In the accompanying drawings:
Fig. 1 is a radio open transmission schematic diagram that continues to take Traffic Channel.
Fig. 2 is the radio open transmission schematic diagram of a frequent data item burst service.
Fig. 3 is the schematic flow sheet of an embodiment of wireless channel simulation method of the present invention.
Fig. 4 carries out the schematic diagram of anticipation to radio open state according to up-downgoing packet.
Fig. 5 is the process of interface of eating dishes without rice or wine in a message process.
Fig. 6 is the structural representation of an embodiment of wireless channel simulation device of the present invention.
Fig. 7 is the structural representation of another embodiment of wireless channel simulation device of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, but do not form inappropriate limitation of the present invention.
To the description only actually of at least one exemplary embodiment, be illustrative below, never as any restriction to the present invention and application or use.
Fig. 1 is a radio open transmission schematic diagram that continues to take Traffic Channel.
As shown in Figure 1, with Full buffer(full queue) FTP(File Transfer Protocol, file transfer protocol (FTP)) and VOIP(Voice over IP, transferring voice on IP) etc. business is example, the feature of these business is can send constantly up-downgoing packet within a period of time, and therefore, its radio open is always in connected state, only need at the beginning of transfer of data, carry out a page(paging) and access(access), Signalling exchange is less.
Fig. 2 is the radio open transmission schematic diagram of a frequent data item burst service.
As shown in Figure 2, different from Fig. 1, it does not send up-downgoing packet constantly, but sends with burst form, so just there will be the frequent transitions of Idle state and connected state, thereby occurs repeatedly page and access process.When this type of business is carried out to emulation, as only considered Traffic Channel, will there is larger difference with real system in simulation result, and then cause simulation result cannot effectively instruct the network planning.
Prior art, when emulation, to front, reverse traffic channel is separately considered therefore can not determine when tear chain open.In order to improve the similitude of emulation and real system, the following embodiment of the present invention is with HRPD(High Rate Packet Data, HRPD (high rate packet data)) mobile communication system is emulation mode and the device that example has proposed a kind of control channel and Traffic Channel, the method and device are equally applicable to the Evolution such as LTE(Long Term, Long Term Evolution) etc. other mobile communication system.Following embodiment has increased the flow process of the user radio state of eating dishes without rice or wine being carried out to anticipation in simulation process, before the user of this flow process based on inputting in emulation reverse data bag the time of advent point and the state transitions mechanism anticipation emulation time-continuing process of agreement or system regulation in each user's radio open state.This newly-increased anticipation flow process can be modified on the basis of original emulation platform.
Fig. 3 is the schematic flow sheet of an embodiment of wireless channel simulation method of the present invention.
As shown in Figure 3, this embodiment can comprise the following steps:
S302, obtains up-downgoing business data packet;
S304, according to state transitions mechanism and the time of advent of the up-downgoing business data packet of obtaining the radio open state of each user in emulation time-continuing process being carried out to anticipation, in this anticipation process, consider upstream data bag and downlink data packet simultaneously, thereby can determine exactly the transfer point of radio open state;
S306, according to anticipation result, forward control channel, Reverse Access Channel and front reverse traffic channel are carried out to time slot driving simulation, time slot driving simulation can be understood as on time shaft and goes to carry out different processing according to the transfer of radio open state, for example, forward direction is that Traffic Channel and control channel are shared time interval resource, and possible this time slot is controlled channel occupancy, carries out the processing of control signal, also may just by Traffic Channel, be taken by next time slot, carry out the processing of data-signal;
S308, each time slot in dynamic simulation is added up, to obtain the Key Performance Indicator of corresponding service channel and control channel, this Key Performance Indicator mainly refers to the performance index of load index and the front reverse traffic channel of forward control channel and Reverse Access Channel, for example, speed and throughput.
This embodiment carries out anticipation to the connection status of eating dishes without rice or wine according to state transitions mechanism and the up-downgoing business data packet that is input to emulation platform the time of advent, then the connection status of eating dishes without rice or wine going out according to anticipation is carried out time slot driving simulation to front reverse traffic channel, forward control channel and Reverse Access Channel, then adds up and export corresponding KPI according to simulation scenarios.The embodiment of the present invention can be carried out to the multi-user mixed services under single base station and under networking condition the Performance Evaluation of Reverse Access Channel and forward control channel, the business of wireless network and the network condition that signaling performance simulation approaches actual mobile communication system dramatically can be made, thereby the network planning and optimization work of mobile communication system can be instructed more efficiently.
In addition, before step 302, embodiments of the invention also carry out initialization to Traffic Channel emulation and the required parameter of control channel emulation, number of cells, number of users, wireless channel environment, the end in each community that for example, can comprise emulation make an uproar threshold value, Traffic Channel dispatching algorithm and control channel dispatching algorithm.In addition, the initialization of emulation platform data also comprises community and user's generation, the initialization of the initialization of path loss module and multi-user service input.Can utilize alone family business model to produce the multi-user service input of a plurality of different business, as multi-user mixed services packet, be input to emulation platform.Alone family business model can be abstract Mathematical Modeling and the business data packet trace(tracking at alone family) file, for example, a user's trace file can comprise following content: packet 1: the time of advent, bag size; Packet 2: reach the time, bag size ...A plurality of users' trace file can be the combination of a plurality of alone families trace file: user 1 trace file, and user 2 trace file ...Emulation that trace file, log file still generate by channel model input has all embodied the interval and the size of the packet time of advent of packet.
Particularly, in step S302, can be by the log(daily record of actual acquisition) file and trace file acquisition up-downgoing business data packet or by channel model etc., meet the upper and lower business data packet of business law generation of certain mathematical distribution.
In step S304, state transitions mechanism can include but not limited to that doze output duration arranges and discontinuous reception parameters setting.In anticipation process, can be according to the time point of user model or the arrival of alone family trace file generated packet, and each user's radio open state (comprising eat dishes without rice or wine connected state and the Idle state of eating dishes without rice or wine) in the whole emulation time-continuing process of radio open state transitions mechanism anticipation, when eat dishes without rice or wine to connect and set up, when enter that dormancy is waited for, the Connection Release etc. of when eating dishes without rice or wine.Because network is initiated the doze output duration doze output duration difference that initiation is connected with terminal connecting, therefore when carrying out the anticipation of radio open state, need judge that connecting is that network is initiated or terminal initiation.For example, according to the time of advent of packet and different timer durations judging whether to tear open chain, and then know current radio open state.Next how the Fig. 4 of take realizes the anticipation of radio open state as example explanation.
Fig. 4 carries out the schematic diagram of anticipation to radio open state according to up-downgoing packet.
As shown in Figure 4, TimerA(timer) be applied in the connection foundation of network initiation, TimerB is applied in the connection foundation of terminal initiation.After downlink data packet 1 arrives, need first page, access, set up Traffic Channel (that is, entering the connected state of eating dishes without rice or wine) again, after downlink data packet 1 end of transmission, start TimerA.At TimerA, also do not finish just to have come upstream data bag 2, send upstream data bag 2 TimerA that resets.When TimerA then and again reaches without new upstream or downstream packet, tear chain open and enter the Idle state of eating dishes without rice or wine.Upstream data bag 3 arrives subsequently, and terminal directly accesses and enter the connected state of eating dishes without rice or wine, and upstream data bag 3 sends rear startup TimerB, when TimerB then and again reaches without new upstream or downstream packet, tears chain open and enters the Idle state of eating dishes without rice or wine.Then network side is initiated downlink data packet 4, after corresponding process is sent, starts TimerA, when TimerA then and again arrives without new upstream or downstream packet, tears chain open and enters the Idle state of eating dishes without rice or wine.As can be seen from Figure 4, the connected state of eating dishes without rice or wine also comprises that data send state and dormant state.
In step S306, to the emulation of front reverse traffic channel, can be undertaken by traditional method, for example, can be according to the transmission rate of scheduling situation and user radio channel condition judgement user's front reverse traffic channel etc.For newly-increased Reverse Access Channel, can judge whether oppositely to access according to the anticipation result of step S304, or whether carry out the access attempts again of lifting power, if made an uproar by the end that base station calculating oppositely accesses and reverse traffic channel produces jointly again, based on the thresholding of making an uproar of the initialized end, reverse busy to base station judges, that is to say, if make an uproar higher than threshold value in the end, represent that active user's number is more or system interference is larger, thereby judge that base station is busier on oppositely, do not advise that new user oppositely accesses again; If make an uproar lower than threshold value in the end, determine that base station is notr busy on oppositely, thereby can carry out new user's reverse access or reattempting of access, and then on the time slot distributing, realize oppositely access.For forward control channel, can when issue page message or when carry out that access control is replied and traffic channel assignments according to agreement regulation and dispatching algorithm judgement, if downlink data packet has arrived, need first page access again, if packet is K time slot while arriving, according to HRPD consensus standard specific control channel time slot after K time slot, send page.When carrying out time slot driving simulation, can directly carry out emulation based on existing protocol, also can simplify and take out a simple and easy version agreement easily realizing existing protocol, and carry out emulation based on this simple and easy version agreement.
In addition, when carrying out time slot driving simulation, the renewal of can also be first according to the wireless environment of setting, each time slot being carried out to channel circumstance (for example, carry out rapid fading renewal), and then carry out the anticipation of radio open state, determine that this time slot carries out the processing of forward control channel, the processing of Reverse Access Channel or carry out the processing of front reverse traffic channel.If this time slot is taken by forward control channel, carry out relevant treatment, no longer carry out afterwards the processing (a certain time slot of forward direction can only by a certain channel occupancy) of Traffic Channel.If forward traffic channel takies, skip the emulation to forward control channel.But, be oppositely that code divides, therefore can first see whether oppositely access, and then calculate the reverse end and make an uproar together with other users that have reverse traffic channel.
Fig. 5 is the process of interface of eating dishes without rice or wine in a message process.
As shown in Figure 5, (this packet can be the data that access terminal and initiatively will upload to a packet, or the network side data that will issue, now network side can be accessed terminal and be initiated oppositely access by page message informing) arrive after, first need to transmit through the signaling of control channel, just can set up Traffic Channel, final data bag transmits by Traffic Channel again.As seen from Figure 4, Traffic Channel has transmitted after data, if the Timer time arrives and do not have new packet to arrive, removes the link between terminal and network.If have again new packet to arrive after tearing chain open, need to re-start the access procedure shown in Fig. 5.If there is new packet to arrive before tearing chain open, just in the Traffic Channel having established, continue to transmit, and without taking again control channel.If packet is frequent, be greater than again Timer the time of advent, there will be larger control channel expense.In Fig. 5, forward control channel can send page message, system message, access control response message and traffic channel assignment message; Reverse Access Channel can send routing update/connection request message, and reverse traffic channel can send Traffic Channel and set up message, and forward traffic channel can send reverse traffic channel response message.
In step S308, Key Performance Indicator can include but not limited to Time Slot Occupancy rate, the data transmission delay of forward control channel, Time Slot Occupancy rate and the reverse traffic channel of Reverse Access Channel are set up duration.The Time Slot Occupancy rate of forward control channel can calculate according to forward control channel shared timeslot number within the unit interval, in like manner, can calculate the Time Slot Occupancy rate of Reverse Access Channel.As can be seen from Figure 5, from accessing terminal or network side receives the instruction that will transmit data, to Traffic Channel, set up the complete time difference that starts to transmit up-downgoing data and can be understood as data transmission delay.In like manner, also can calculate reverse traffic channel and set up duration, that is, in Fig. 5, from routing update/connection request to Traffic Channel, having set up the shared time is that reverse traffic channel is set up duration, also can be understood as access procedure required time.
Above-described embodiment need to be considered upstream data bag and downlink data packet when anticipation radio open state simultaneously, in anticipation, goes out after radio open state, can separately carry out emulation to front each reverse channel, to reduce the complexity of emulation.
One of ordinary skill in the art will appreciate that, whole and the part steps that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computing equipment read/write memory medium, this program is when carrying out, execution comprises the step of said method embodiment, and aforesaid storage medium can comprise the various media that can be program code stored such as ROM, RAM, magnetic disc and CD.
Fig. 6 is the structural representation of an embodiment of wireless channel simulation device of the present invention.
As shown in Figure 6, the device 60 in this embodiment can comprise business datum acquiring unit 602, eat dishes without rice or wine state anticipation unit 604, time slot driving simulation unit 606 and performance index statistic unit 608.
Wherein, business datum acquiring unit 602 obtains up-downgoing business data packet, and the up-downgoing business data packet of obtaining can or generate by channel model from log file; Eat dishes without rice or wine state anticipation unit 604 according to state transitions mechanism and the time of advent of the up-downgoing business data packet of obtaining the radio open state of each user in emulation time-continuing process being carried out to anticipation, wherein, state transitions mechanism can comprise that doze output duration arranges and discontinuous reception parameters setting, and radio open state comprises eat dishes without rice or wine connected state and the Idle state of eating dishes without rice or wine; Time slot driving simulation unit 606 carries out time slot driving simulation according to anticipation result to forward control channel, Reverse Access Channel and front reverse traffic channel; 608 pairs of performance index statistic units each time slot in dynamic simulation is added up, to obtain the Key Performance Indicator of corresponding service channel and control channel, wherein, Key Performance Indicator can include but not limited to Time Slot Occupancy rate, the data transmission delay of forward control channel, Time Slot Occupancy rate and the reverse traffic channel of Reverse Access Channel are set up duration.
This embodiment has promoted the ability of existing emulation platform, it is simultaneously according to the time of advent of upstream data bag and downlink data packet and state transitions mechanism is common determines radio open state, then the eat dishes without rice or wine dynamic simulation of control channel and access channel of the radio open state based on after anticipation.This embodiment has considered that multi-user, to alternately the taking and discharge of the Traffic Channel of eating dishes without rice or wine, can carry out the dynamic simulation of Traffic Channel performance more accurately, is more suitable for the traffic performance of mobile Internet.
Fig. 7 is the structural representation of another embodiment of wireless channel simulation device of the present invention.
As shown in Figure 7, compare with the embodiment in Fig. 6, the device 70 in this embodiment can also comprise parameter initialization unit 702, and it carries out initialization to Traffic Channel emulation and the required parameter of control channel emulation.
The above embodiment of the present invention has considered that multi-user, to alternately the taking and discharge of the Traffic Channel of eating dishes without rice or wine, can carry out the dynamic simulation of Traffic Channel performance more accurately, is more suitable for the traffic performance of mobile Internet; Simultaneously, when emulation, also consider forward control channel and Reverse Access Channel taking system resource, can find out, emulation mode of the present invention can make the business of wireless network and the network condition that signaling emulation approaches actual mobile communication system dramatically, instructs more efficiently the network planning and optimization work of mobile communication system.
In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that part identical with similar between each embodiment can cross-references.For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part can be referring to the explanation of embodiment of the method part.
Although specific embodiments more of the present invention are had been described in detail by example, it should be appreciated by those skilled in the art, above example is only in order to describe, rather than in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (12)
1. a wireless channel simulation method, is characterized in that, comprising:
Obtain up-downgoing business data packet;
According to state transitions mechanism and the time of advent of the up-downgoing business data packet of obtaining the radio open state of each user in emulation time-continuing process being carried out to anticipation;
According to anticipation result, forward control channel, Reverse Access Channel and front reverse traffic channel are carried out to time slot driving simulation;
Each time slot in dynamic simulation is added up, to obtain the Key Performance Indicator of corresponding service channel and control channel.
2. wireless channel simulation method according to claim 1, is characterized in that, described method also comprises:
Traffic Channel emulation and the required parameter of control channel emulation are carried out to initialization.
3. wireless channel simulation method according to claim 1, is characterized in that, described in the up-downgoing business data packet obtained from log file or generate by channel model.
4. wireless channel simulation method according to claim 1, is characterized in that, described state transitions mechanism comprises that doze output duration arranges and discontinuous reception parameters setting.
5. wireless channel simulation method according to claim 4, is characterized in that, described radio open state comprises eat dishes without rice or wine connected state and the Idle state of eating dishes without rice or wine.
6. wireless channel simulation method according to claim 1, is characterized in that, described Key Performance Indicator comprises Time Slot Occupancy rate, the data transmission delay of forward control channel, Time Slot Occupancy rate and the reverse traffic channel of Reverse Access Channel are set up duration.
7. a wireless channel simulation device, is characterized in that, comprising:
Business datum acquiring unit, for obtaining up-downgoing business data packet;
The state anticipation unit of eating dishes without rice or wine, for according to the time of advent of state transitions mechanism and the up-downgoing business data packet obtained each user's of emulation time-continuing process radio open state being carried out to anticipation;
Time slot driving simulation unit, for carrying out time slot driving simulation according to anticipation result to forward control channel, Reverse Access Channel and front reverse traffic channel;
Performance index statistic unit, for adding up each time slot in dynamic simulation, to obtain the Key Performance Indicator of corresponding service channel and control channel.
8. wireless channel simulation device according to claim 7, is characterized in that, described device also comprises:
Parameter initialization unit, for carrying out initialization to Traffic Channel emulation and the required parameter of control channel emulation.
9. wireless channel simulation device according to claim 7, is characterized in that, described in the up-downgoing business data packet obtained from log file or generate by channel model.
10. wireless channel simulation device according to claim 7, is characterized in that, described state transitions mechanism comprises that doze output duration arranges and discontinuous reception parameters setting.
11. wireless channel simulation devices according to claim 10, is characterized in that, described radio open state comprises eat dishes without rice or wine connected state and the Idle state of eating dishes without rice or wine.
12. wireless channel simulation devices according to claim 7, is characterized in that, described Key Performance Indicator comprises Time Slot Occupancy rate, the data transmission delay of forward control channel, Time Slot Occupancy rate and the reverse traffic channel of Reverse Access Channel are set up duration.
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