CN1280751A - Method and arrangement for generation of cell relations in a mobile communications by system - Google Patents
Method and arrangement for generation of cell relations in a mobile communications by system Download PDFInfo
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- CN1280751A CN1280751A CN 98811670 CN98811670A CN1280751A CN 1280751 A CN1280751 A CN 1280751A CN 98811670 CN98811670 CN 98811670 CN 98811670 A CN98811670 A CN 98811670A CN 1280751 A CN1280751 A CN 1280751A
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Abstract
A mobile communication system and method for determining cell relations between cells is disclosed. The invention makes use of strongly coded predefined messages sent from MSs (or BSs) and received in a plurality of radio ports. Measurements of the received messages are reported to a central unit for processing and/or storage. The transmission and reception of the predefined messages is ordered from the central unit. The central unit can also clear interference on a certain frequency to allow for reliable reception in remote receivers.
Description
Invention field
Present invention relates in general to wireless communication system, relate more specifically to a kind of method and system of in cellular communication system, measuring cell relations.
Background of invention
Usually concerning cellular radio Communication system, on the whole system overlay area, divide Radio Resource.The principle of cellular system is that an overlay area is divided into the plurality of sub zone is the sub-district, and wherein each sub-district has one group of available communication resource to can be user's service.The known technology of dividing usable radio resources between the sub-district has many kinds.In tdma system (time division multiple access access), allow transmission information in the time slot of user on radio-frequency carrier, like this, different time slot allocation to each user on same frequency.For example, in this system, the channel of minizone can be divided like this, so that make neighbor cell use different frequencies.Exist two types interference: cochannel disturbs and adjacent-channel interference; These interference are subjected to the restriction that intelligence is divided Radio Resource between overlay area (being the sub-district).If sending on same frequency simultaneously then produce cochannel, disturb two independent signals.Each signal is the phase mutual interference, and the receiver that receives these two signals may not be separated a signal or can not detect in them any one from the another one signal.If in same geographic area, use adjacent channel on the frequency spectrum then produce adjacent-channel interference.Transmission on a certain frequency can leak into the phase Adjacent Channel and produce and disturb.Can limit these problems by method to distinct coverage region smart allocation frequency.But still have (cochannel) to disturb between different districts, this mainly is because frequency must be repeated to use.If but known cell relation then can improve plot planning, and will limit this inevitable interference more.
In addition, if the interference that is vulnerable on the known a certain channel is much and where (in what sub-district) produces interference, just can implement to improve channel allocation algorithm.Therefore, utilize the slow and fast information that can how to influence already present connection about a new connection, will improve this allocation algorithm more.The known method of estimating cell relations concentrates on total interference of measuring a certain sub-district.Measurement is carried out on the general service of system usually, and therefore can not control the measurement of cell relations with effective and efficient manner.This external pelivimetry also is restricted to the estimation of the signal strength signal intensity of Interference Estimation and ongoing business and signaling (itself is interfered easily usually).Because carrier wave and interference (C/I) are than being not enough to carry out highly reliable detection, so do not allow not have the end of a thread sub-district received signal from afar.Previous method is come the estimated path gain based on statistical measurement in cellular system in addition, and this has produced a large amount of next signalings since the base station, has also introduced unnecessary traffic carrying capacity in system.
In U.S. Pat 5,157, an adaptive wireless communication system has been described in 709.This system comprises a control station of supporting interference matrix.The signal path gain value that this matrix representative receives on wireless channel.This information is used to carry out adaptive channel and distributes.In U.S. Pat 5,603, the another kind of method disturbed estimated has been described in 092.Implement in these two patents, measuring all during business is carried out.Measure signal simultaneously, consequently have only the strongest signal to be identified usually from several transmitters.If the sub-district that might disturb mutually to all being operated on the same channel, it is very important then finding the cell relations between them.The signal that comes from the some of them sub-district is very faint, and is difficult to the original contents of signal is decoded.
Therefore, provide a kind of and can estimate reliably even the method for the cell relations of far (non-conterminous) sub-district of distance will be very beneficial, this estimation is not disturbed ongoing business or is not disturbed by ongoing business and can not produce a large amount of signalings between base station and system.
Brief summary of the invention
When measuring the cell relations of the far sub-district of phase mutual edge distance, have problems owing to Carrier interference ratio (C/I) is not enough through regular meeting.
Send by command transmitter according to the present invention and specificly, predefined to be mainly used in the message of measuring purpose and to order one or several receiver to measure received signal strength signal intensity, above-mentioned and other problem can be resolved.
In more detail, this problem is to solve like this: command transmitter sends message sometime on a certain frequency, and orders at least one receiver to measure the signal strength signal intensity of this message and report the described signal strength signal intensity that records to central location.Produce the statistics cell relations value of representative at central location from the path gain of transmitted from transmitter to receiver.
Specific, predefined message can be through strong coding so that allow under abominable wireless environment and in remote receiver, it detected.In addition, in one embodiment of the invention, central location can send quiet request, promptly orders other transmitter not send on certain frequency He in certain period.This also will reduce interference on this frequency and permission even farther receiver and detect this specific, predefined message.
In another embodiment, before channel allocation, travelling carriage can send specific, predefined message on the frequency of be about to distributing, and transceiver station (for example not having the end of a thread) can estimate that new certain channel that is distributed that connects is increased to extra interference in the connection that has existed in the system afterwards.This information can obtain very soon and may combine with the statistical information that has obtained, and adaptive channel distributes (ACA) algorithm, enters control (adminssion control) or control algolithm so that for example use it for.
In another embodiment of the invention, a certain characteristic frequency is used for sending predefine message from single wireless hair, and be not to carry out signal strength measurement in the travelling carriage in the sub-district of being served by the no the end of a thread of this transmission.To given limited geographic area, this characteristic frequency only is used for predefine message.The traverse measurement result combinations of the signal strength signal intensity on the current service frequency in these measurement results and this sub-district together, and can to calculate that another cell relations estimates be C/I.When travelling carriage when measuring, this single no the end of a thread is the unique transmitter on this characteristic frequency in a finite time, and another no the end of a thread also becomes the unique transmitter on this characteristic frequency.The measurement of repeatability will with the form of C/I for all sub-districts to cell relations is provided.
An object of the present invention is to access reliable cell relations too in the minizone of wide apart.
Another object of the present invention is the short term information that obtains about current disturbed condition.
A further object of the invention is to obtain frequent measured value and collect measured information to be used for statistics.
An advantage of the invention is the cell relations that not only can obtain the very near sub-district of phase mutual edge distance.
Another advantage is for example can analyze the present situation before travelling carriage begins to send.
Also having an advantage is the statistical measures that can obtain cell relations in a big zone.
The accompanying drawing summary
Read in conjunction with the accompanying drawings to describe in detail partly and will more fully understand the present invention, similar reference marker is used to specify similar unit among the figure, wherein;
Fig. 1 represents the signaling between central location according to an embodiment of the invention, no the end of a thread and the travelling carriage.
Fig. 2 is for realizing the representative graph of indoor heating system of the present invention.
Fig. 3 is for realizing the representative graph of (grand) of the present invention cellular cell.
Fig. 4 represents the path gain matrix, wherein can store according to measurement result of the present invention.
Fig. 5 is the flow chart of the embodiment of a demonstration of description the present invention.
Fig. 6 is the flow chart of the embodiment of another demonstration of description the present invention.
Fig. 7 illustrates the embodiment of a demonstration of the present invention, wherein measures by travelling carriage and carries out.
Describe in detail
Put up with the concentrated synchronized model cell mobile communication systems that adopts time division multiple access to insert (TDMA) scheme below and describe the present invention.But be to be understood that the present invention has also considered other wheel synchronization type and the asynchronous system of same or other access style.Packet switching system and circuit switching system can both use the present invention.
According to an aspect of the present invention, transmitter (for example travelling carriage) sends predefine message on Traffic Channel, and this message may be received by a plurality of no the end of a thread.Also to explain predefine message hereinafter.Here no the end of a thread is defined as the base station that is connected with mobile switching centre or relevant device directly or indirectly or the transceiver station of other type.Typical no the end of a thread is to be a certain concrete sub-district serving base station in the cellular wireless system.To distributed indoor heating system, no the end of a thread is that the part for the sub-district is the transceiver station of sub cell service, and many sub cells form a sub-district.No the end of a thread can be measured a plurality of parameters of this specific predefine message, for example resembles received signal intensity, time delay expansion, mobile identity (if being comprised in predefine message) and signal-to-jamming ratio (Carrier interference ratio C/I).The no the end of a thread that receives predefine message in one embodiment is with measure signal intensity and to central location report measurement result, and in central location, signal strength measurement is used to calculate the path gain that sends between message sub-district and the reception message sub-district.If send predefine message with certain transmitted power, then this is possible.Central location (or not having the end of a thread) can order MS to send predefine message with certain power, and perhaps MS can comprise the information about the employed performance number of predefine message.Cell relations and path gain that measurement result can be used for calculating other type certainly are exactly an example.Path gain is nothing but the relation between transmitted power and the received power.The processing of path gain also can change at each no the end of a thread to be carried out, and in this case its gained result is reported to central location.This is ongoing program.The statistical representation of the measurement result that obtains may be for example to show to answer with the form of distribution function.
These measurement results can be stored in the path gain matrix, and are used in several application when the needs minizone concerns after a while.For example for the plot planning purpose, can in the adaptive channel allocation algorithm, use, can in handoff algorithms, use or be used to enter control.
Fig. 1 represents one embodiment of the invention.There is shown a mobile communication system.In order to make this figure more clear, Fig. 1 has removed many unit included in complete telecommunication system.Fig. 1 only illustrates that these are these necessary unit to understanding the present invention in PLMN.Central location CU links to each other with a plurality of no the end of a thread or base station.Connection from central location to no the end of a thread BS1 dots.No the end of a thread BS1 can set up and the wireless connections that are positioned at the travelling carriage within the base station radio coverage.There are not wireless connections between the end of a thread BS1 and the mobile subscriber MS with the zigzag symbolic representation among the figure.
The method according to this invention may further comprise the steps:
-central location CU indicates the measuring equipment of each base station (being each no the end of a thread) to prepare to measure on certain frequency and time slot.The instruction message I1 that represents this order in the drawings represents with the arrow between central location CU and one of them no the end of a thread.Although Fig. 1 only shows an arrow, instruction message is to send to all no the end of a thread from central location.Certainly, instruction I1 preferably is confined to some no the end of a thread, and for these no the end of a thread, measuring may be in a certain limited geographic area or or even only meaningful to single no the end of a thread.
-central location CU sends order 12 to mobile station MS, orders its special-purpose predefine message of transmission in particular channel (frequency) is gone up special time (time slot), as before shown to wireless hair send.
-sending one by no the end of a thread BS1 will mail to command messages 13 mobile station MS, that be used to send predefine message, this command messages 13 is sent to specific mobile station MS.Central location can to a plurality of wireless heads be sent in the special time and particular channel on do not arrange the order of any business.This represents with central location CU and the arrow that do not have between the end of a thread BS1 in Fig. 1.The reason of doing like this is to wish to be listened to by no the end of a thread as much as possible by the predefine message that MS sends, so as to obtain not only with nearest no the end of a thread but also with the cell relations of farther no the end of a thread.Low C/I (Carrier interference ratio) on these links and C/N (carrier-to-noise ratio) condition may make and realize that this point becomes complicated.Thereby central location also can limit the interference on correlated frequency and the time slot and intercept predefine message on this channel.This " quiet request " can be used as selectable characteristic and implements or do not implement.This way can also be extended to and comprise that adjacent channel or frequency are so that the adjacent-channel interference during the restriction measurement.For example in the system of packet switching GPRS and so on, up link sends and is controlled by Uplink State Flag (USF), and USF just allows travelling carriage to send when being necessary for a certain value.Therefore quiet request can realize by taking the method for Uplink State Flag is not set in this type systematic at an easy rate, except being ordered under the situation that sends predefine message at travelling carriage.
-MS sends predefine message on defined frequency and time slot.This represents with travelling carriage and the arrow 15 that do not have between the end of a thread BS1 in the drawings.
-a plurality of no the end of a thread receive predefine message 15.No the end of a thread is carried out the measurement (as signal strength measurement) that central location CU is asked, and gives CU the result.In order to set up cell relations, repeat said process up to obtaining enough sub-district values.May wish to carry out these measurements off and on, filter its result, and upgrade cell relations along with the cellular system development.Predefine message may comprise the identity of the no the end of a thread that sends the travelling carriage identity, connected, transmitted power or any other appropriate information that travelling carriage sends message.But, only order a specific travelling carriage to send under the situation of predefine message at central location, then the travelling carriage identity has been known by system, these contents in the predefine message are unnecessary.
Even because under abominable wireless environment, also should intercept predefine message, so should adopt low rate coding (as 1/2 speed or low rate more) to be protected.If still can not successfully decode, then can send extra identical predefine message and can be two soft combining of decoded message.But this process may be only just takes place when a plurality of no the end of a thread or a certain specific wireless head can not be decoded the predefine message that sends for the first time, because this order that sends for the second time must be sent by central location.Should also be noted that in another embodiment of the invention and all can utilize the information that is necessary that predefine message needn't carry any information and therefore coding is also unimportant at travelling carriage and network side.
It also is possible sending predefine message with idle MS, but MS that also can utilization and operation.In this case, have necessity and make restriction comprising which information in the predefine message.If do not send " quiet request " above-mentioned from central location (CU), the method that above-mentioned cell relations is measured when the channel that is not interfered (frequency) quantity is very big suits to carry out under the low traffic condition.
See Fig. 2 now, Fig. 2 illustrates the example of using a distributed indoor heating system of the present invention.Such system is very little usually with low-power transmit signals and sub-district usually.This system is called as indoor heating system here, can certainly be the system that serves in outdoor environment.A plurality of no the end of a thread RAD (wireless antenna device) provide wireless coverage to sub-district 1-3.The overlay area of a RAD is called sub cell, and sub-district 1-3 of a plurality of sub cell definition.Each RAD is by central control unit CU control, and this CU is responsible for a plurality of sub-districts.No the end of a thread that explanation covers 3 sub-districts among the figure all links to each other with same central location, but the sub-district number can be arbitrarily, just as the RAD number of serving for each sub-district also be arbitrarily.In this type systematic, usually give cell allocation one class frequency, and the RAD of each sub-district can send on all these frequencies, although be not simultaneously.The present invention is very suitable to be applied to this system, and central location wherein can be ordered each RAD that the travelling carriage that sends predefine message in the sub-district is measured and can be to be measured the relation that the same mode of cell relations obtain sub cell.The still very important and this measurement of the relation between the sub-district of being to be understood that is also carried out in the system of these types.
Fig. 3 has illustrated that is used a macrocell system of the present invention.Adopt mode similar to the above, central location in the system of GSM and so on such as MSC (mobile services switching centre) or BSC (base station controller) can indicate any terminal in the coverage of any no the end of a thread that is attached thereto to send predefine message.MSC can order a plurality of no the end of a thread to intercept this message equally and return the report measurement result to MSC.MSC itself can stores it, perhaps can be sent to any other node to the result so that handle and store.
See Fig. 4 below, it has represented the path gain matrix of a demonstration.This is the no the end of a thread of storage is measured the gained result to predefine message a kind of method.The transmission source region of the corresponding predefine message of no the end of a thread that the longitudinal axis is corresponding different and transverse axis.For example the relation of sub-district (representing with 2 here) and no the end of a thread (representing with 1 here) can be stored as matrix element g12.Therefore, just be stored on the matrix element g12 by the measurement result of the signal that sends from sub-district 2 being carried out for no the end of a thread of sub-district 1 service.Matrix element for example can be represented and the corresponding path gain distribution function of observation sequence number.Certainly other method for expressing also is possible.
Fig. 5 represents the flow chart of one embodiment of the invention.Send one to measure request command from central location to a plurality of wireless hairs to start process of measurement, 710.This order comprises at least: the terminal of no the end of a thread indication travelling carriage or other type sends predefine message, and at least one no the end of a thread is intercepted a certain characteristic frequency so that receive predefine message.A no the end of a thread sends a transmission request, 720 according to measuring request command to mobile station MS then.Travelling carriage receives the type of message that will send in sending request, be tuned to correct frequency and send predefine message, 730.At least one no the end of a thread is carried out measurement and is reported these measurement results to central location predefine message according to the request of measuring.At central location, receive these measurement results and it is handled to be suitable for more multiduty mode.
Fig. 6 represents another embodiment of the present invention, and its difference is that the request of measuring sends together in company with quiet request.This quietness request indicates their travelling carriages of being served of a plurality of no the end of a thread orders not send on a certain frequency in certain time.Sending in interruption on a certain frequency can be by distributing other frequency or simple the wait up to sending termination and not reallocating to call out and realize to the user again on this assigned frequency.
After travelling carriage took orders transmission predefine message, this quietness request was left in the basket certainly.In this way, in certain period and the interference on a certain frequency just be eliminated, and do not have the end of a thread and can be easier to be received in this section period and the predefine message that sends on this frequency.Therefore can obtain to be greatly improved according to this technical method apart from the cell relations between the remote sub-district and its reliability that concerns that records like this.
May measure by the predefine message of radio port transmission and to central location report measurement result by indicating mobile terminal in another embodiment.In this case, should send the order of predefine message at least, and can be sent in certain time to travelling carriage by radio port and intercept the order of a certain frequency to radio port.The result that records of portable terminal is sent to central location by no the end of a thread then.In this embodiment at least for the reason of conserve batteries, the processing of measurement result is more suitable for carrying out at central location.
See Fig. 7 now, Fig. 7 further is described in travelling carriage rather than does not have the embodiment of measuring in the end of a thread.A plurality of sub-district C1..Cn and a plurality of mobile radio station M1..Mm that service is provided by no the end of a thread BS1..BSN are arranged shown in the figure.As mentioned above, central location can send the quietness request of a certain frequency and allow to have only in certain zone no the end of a thread (for example BS1) to send with certain power output on a certain frequency f 1.Service disconnection in this external this method on a certain frequency can be by redistributing other frequency or realizing up to the transmission termination and the method for calling out of not reallocating on this assigned frequency by simple wait for the user.Central location order travelling carriage M1..Mm measures received signal intensity on frequency f 1 then.This order can realize by f1 being included in the MAHO inventory (MAHO).The MAHO inventory is the inventory that travelling carriage carries out the frequency of general measure, according to this inventory, in case just can switch on the high-quality frequency in the signal quality variation on the current frequency.This inventory also can be used to force travelling carriage to measure cell relations on a certain frequency.These features of the present invention also will be described below.
The travelling carriage M1..Mm that is positioned at different districts then is reported in the signal strength signal intensity that records on the frequency f 1 to central location, and the path gain that is provided by BS1 between the sub-district C1 of service and the sub-district that M1..Mm takies is provided at central location.After the enough measurement results of sub-district C1 when having collected BS1 and on frequency f 1, send, can order BS1 quiet on the f1 and order another base station (for example BS3) on f1, to send, and can obtain sub-district C3 in an identical manner and the sub-district served for M1..Mm between relation.
A specific base stations should send the long enough time so that travelling carriage obtains good measurement result.Because it will be very little that state of affairs changes, so the use of duplicate measurements is very limited in a certain time interval of lacking very much.Utilizing f1 like this, after a time is very easily from the relation measurement of BS3 for example to some other sub-district.By repeating this strategy, other BS is quiet on f1 sending on the f1 to allow different BS, just may obtain large-scale cell relations with effective and efficient manner.Can certainly use several frequencies resemble f1.This may be that a kind of of professional total resources that be used for that can get clogged under different situations traded off.
The front is mentioned, and not only the path gain between measure signal intensity but also calculating different districts may be very important.For example noticeable another kind of quality measure is C/I (being Carrier interference ratio) for the frequency planning purpose.The present invention can be easy to be modified to calculating C/I value and be not only the calculating path yield value.For example in the embodiment of describing in the above, travelling carriage M1..Mm not only collects and reports from frequency f 1 but also be from their professional itself signal strength measurement in the Serving cell, for example M4 measure signal intensity on f4.Signal strength signal intensity on the f1 corresponding to from the I of certain sub-district and the signal strength signal intensity on the f4 certain position and time corresponding to C, thereby just can provide C/I immediately.Note,, then just can calculate C/I in the case on by the frequency f of disturbing from the transmission of the BS1 of sub-district C1 1 if the M4 among the C4 receives.
To describe in more detail below: utilize above-mentioned result even the possibility estimating uplink C/I that records from same down link.Except above-mentioned, no the end of a thread only needs to provide the travelling carriage in the sub-district of service to collect the signal measurement result from it.Can learn the path gain of the M4 in (for example C4) from BS1 to the travelling carriage.Because the power output of known base station, thereby just may estimate the interference that causes by the M4 among the C4 of sub-district to sub-district C1 up link.The travelling carriage that can obtain from C4 by duplicate measurements distributes to the required uplink channel interference of C1 up link.Simultaneously, can the collect measurement result of C1 up link of the travelling carriage in C1.Interference and the signal strength signal intensity of itself are approximate separate concerning up link, and we can be by carrying out the up link C/I distribution that convolution is estimated sub-district C1 to C and I distribution.Because down link C is relevant with I, be impossible so down link is done this being similar to.
It should be noted that many embodiments can realize the present invention easily.For example the present invention can be used for obtaining the short term information about current disturbance regime.When idle MS wants to begin to send, may need to know how this will influence the remainder of network.Be used for sending " test " if pulse train is so that definite MS begins to send then will produce the device of great interference so the invention provides from MS.This also is useful between transfer period.
Another advantage of the present invention is if frequently measure, may obtain to be described in " snapshot (Snapshot) the path gain matrix " of the instantaneous path gain value between all MS and the BS (no the end of a thread).This matrix is to such as the algorithm of quick A CA (adaptive channel distribution) of great use.All the other users of while are in the method for wait by allowing all MS send uplink message, can upgrade the path gain Matrix Estimation with fixed intervals.This " fast " method is particularly suitable for packet switching communication, because wherein allow service delay usually.Also may in system, keep a dedicated channel for this purpose.
Be appreciated that the signal measurement result that above-mentioned embodiment utilization receives determines the decay cell relations according to value of magnification.But need express cell relations with Carrier interference ratio (C/I) sometimes.The cell relations that certainly utilizes value of magnification to calculate other is estimated.According to an aspect of the present invention, utilize the value of magnification that obtained by uplink signal strength measurement result rather than actual downlink signal strength measurement result formal representation downlink cell relation with the C/I ratio.Because the frequency expansion of up link and downlink spectrum is relative narrow, supposes that the up link value of magnification is also corresponding to the up link value of magnification.In brief, the value of magnification that obtains on uplink direction is also illustrated in the value of magnification that downlink side makes progress.Under this hypothesis, known power output comes the estimating down-ward link cell relations with the form of C/I ratio based on up link value of magnification and base station.The signal strength signal intensity C of this communication service can be measured in the base station then.Signal strength signal intensity C can disturb the combined Carrier interference ratio (C/I) that obtains with the transmission of peripheral cell.This C/I ratio can be stored in the matrix to substitute value of magnification or to be stored in the matrix with value of magnification.Therefore, right for all sub-districts, the invention provides when using same frequency one of them cell uplink or the distribution of down link C/I situation and the C/I under the opposite condition and distribute in given another sub-district.
Down link I can multiply by corresponding up link value of magnification with known base station power output and estimate.Down link C can multiply by corresponding up link value of magnification with base station power output known in the sub-district and estimate.Perhaps, down link C may be the signal strength measurement that travelling carriage is reported.Should also be noted that because the C of down link is relevant with I for obtaining correct down link distribution, it is necessary that C and I are measured simultaneously.But to up link, C and I distribute can for example collect and carry out subsequently convolution separately.This is because the distribution of uplink carrier intensity and interference is incoherent.Become the information conversion of the relevant cochannel C/I that collects relevant adjacent channel C/I information to finish by reducing with a suitable factor to disturb at an easy rate.
The expansion of cellular phone network often causes setting up new sub-district gradually by new base station is installed.Therefore need make new sub-district can work before the relation of the new sub-district of estimation and existing sub-district.Certainly can be to the said method correct so that handle this situation.The most important point is to determine which travelling carriage is in " void " sub-district (being unactivated new sub-district), if this sub-district is to work.In case these travelling carriages are identified, the signal strength signal intensity that inserts pulse train at random that is associated with these travelling carriages can be measured in the base station in real cell.Can be used for calculating decay or C/I distribution to signal strength measurement then, so can think that just this distribution belongs to this void cell.
For determining that this void cell which travelling carriage of back that in a single day is activated will belong to it, we can use and move auxiliary switch (MAHO) of merit and measure, and this measurement is carried out by the base station.Antenna that is located at position, empty base station all sends on a certain frequency in the MAHO inventory of travelling carriages in being included in this zone, and subsequently to central location report MAHO measurement result.Although in fact there is not travelling carriage to link to each other with empty base station, central location just can be determined by consideration standard cell selecting standard simply: if void cell activates, which travelling carriage will be attached thereto.Certainly should be noted that and in measuring process, will not use the travelling carriage that is currently located at not in the zone that is covered by existing sub-district.
Certainly may carry out measurement with the equipment (for example empty base station) that may be positioned at base station location from the travelling carriage that is positioned at other sub-district.If we are interested in C/I relation, C can estimate with MAHO measurement result or signal strength measurement and by being decoded by empty base station.By send signal from the void cell station, the empty base station that will measure in other sub-district may produce interference.The interference that other sub-district produces can be measured in empty conversely base station.But, if the carrier signal difference that the interference that comes from other sub-district was produced in the time of must linking to each other with empty base station with travelling carriage is come.Can come according to the timing of the above-mentioned MAHO measurement result of reporting carrier signal strength (C) and interference (I) are distinguished.
Similarly, the travelling carriage that will belong to void cell can be used to produce or measure and disturb.Based on the knowledge which travelling carriage will belong to void cell to, we can measure at other cell base station and disturb.Also can measure from the carrier signal strength that the travelling carriage that will belong to empty base station comes by the receiver that is comprised in the empty base station.Suppose that up link is the same with the down link value of magnification, then output just can obtain to belong to the carrier signal strength of the travelling carriage of empty base station according to the transmitted power of up link value of magnification and empty base station.In CU, carry out time correlation to the carrier signal strength that obtains like this with in the interference that this mobile radio station records.In addition, the travelling carriage that will belong to void cell, from the carrier signal strength of empty base station, can utilize the MAHO measured value to measure by means of the inventory that comprises a frequency that is used in void cell, communicating by empty base station.
Therefore, should be appreciated that above is the description of the embodiment of the invention, can with as the unswerving condition of the defined the spirit and scope of the present invention of following claim under this description is made amendment.
Claims (37)
1. method of in cellular communication system, determining the cell relations between a plurality of sub-districts, each sub-district provides service by at least one no the end of a thread, and the method comprising the steps of:
-on time of determining and the frequency determined, send predefine message from transmitter;
-at least one receiver receives predefine message on described definite frequency;
-at least one receiver is measured the received signal intensity of described predefine message;
-identification sends the transmitter of predefine message at least one receiver;
-report the received signal intensity of described measurement to central location;
-generation cell relations value in central location, the path gain of the described predefine message of this value representation from described transmitter to described at least one receiver.
2. the process of claim 1 wherein that the output power signal of the predefine message that sends from transmitter is pre-determined by central location.
3. the process of claim 1 wherein that the output power signal of the predefine message that sends from transmitter is reported to central location.
4. the process of claim 1 wherein that transmitter is a travelling carriage.
5. the process of claim 1 wherein that at least one receiver is no the end of a thread.
6. the method for claim 5, wherein this no the end of a thread is not no the end of a thread of the sub-district service that is positioned for transmitter.
7. the process of claim 1 wherein that the transmission of predefine message is started by the order that comes from central location.
8. the method for claim 1 also is included in the step that sends before the predefine messages step:
-sending quiet request from the central location of system, wherein said quiet request is an order that does not allow other transmitting element send on described definite time and described definite frequency.
9. the process of claim 1 wherein that described predefine message is the message through coding.
10. the method for claim 7, wherein bit rate is equal to or less than 1/2.
11. a method of determining instantaneous interfere information between a plurality of sub-districts in cellular communication system, each sub-district provides service by at least one no the end of a thread, and the method comprising the steps of:
-send predefine message from travelling carriage in the time of determining and definite frequency;
-a plurality of no the end of a thread receive predefine message on described definite frequency;
-received signal the intensity of the described predefine message of measurement in no the end of a thread;
-identification sends the transmitter of predefine message in no the end of a thread;
-estimate by described predefine message that at each no the end of a thread Serving cell at the interference value of introducing in the ongoing connection, wherein said definite frequency is used for communication on described definite frequency.
12. a method of determining the cell relations between a plurality of sub-districts in cellular communication system, each sub-district provides service by at least one no the end of a thread, and the method comprising the steps of:
-send measuring command from central location at least one wireless hair;
-send order at least one base station;
-at least one travelling carriage sends predefine message on Traffic Channel, the message of wherein said transmission is determined by described transmission order;
-receive described predefine message and carry out measurement at least one no the end of a thread according to described measuring command;
-report described measurement result to central location.
13. the method for claim 12 also comprises step:
-during measuring, remove Traffic Channel to disturb.
14. the method for claim 12, wherein measuring command comprise at least Measuring Time section, Traffic Channel and predefine message one of them.
15. the method for claim 12 wherein sends order by a no the end of a thread at least one travelling carriage at least.
16. the method for claim 12, wherein send a command to comprise less transmitting time section, Traffic Channel and predefine message one of them.
17. the method for claim 12, the step of wherein measuring described predefine message comprise determine at least signal strength signal intensity, signal identification, time delay expansion and signal-to-jamming ratio one of them.
18. a method of determining the cell relations between a plurality of sub-districts in cellular communication system, each sub-district provides service by at least one no the end of a thread, and the method comprising the steps of:
-transmitter sends predefine message on time of determining and the frequency determined;
-at least one receiver is received in the described predefine message on the described definite frequency;
-this at least one receiver is measured the signal strength signal intensity of the described predefine message that is received;
-at least one receiver is identified in the no the end of a thread that when sending predefine message dispatching station is provided service;
-to the described received signal intensity that records of central location report;
-produce path gain value, the path gain of the described predefine message of this value representation at central location from described transmitter to described receiver.
19. a cellular communication system comprises:
-a plurality of sub-districts wherein provide wireless coverage to each sub-district by at least one no the end of a thread;
-one central location that is connected with a plurality of no the end of a thread;
-from described central location to the lose one's life device of order of a plurality of wireless hairs that are attached thereto, comprise the order that the no the end of a thread of at least one indication is measured in the wherein said order on time of determining and definite frequency;
-be sent in definite time and the frequency determined sends the device of the order of predefine message from described central location to travelling carriage;
-measure the device of the received signal intensity of at least one above-mentioned predefine message at a plurality of no the end of a thread;
-in described central location, be stored in the device of the expression of the measurement result that a plurality of no the end of a thread finish.
20. a method of determining the cell relations between a plurality of sub-districts in cellular communication system, each sub-district provides service by at least one no the end of a thread, and the method comprising the steps of:
-send predefine message from least one no the end of a thread of serving the first definite sub-district in time of determining and the frequency determined, wherein carrying out described transmission and described central location order by the central location order is that the no the end of a thread of other sub-district service in the appointed area interrupts transmission on described assigned frequency;
-on described definite frequency, receive predefine message at least one travelling carriage, wherein this at least one travelling carriage is positioned at described appointed area and described definite different sub-district, first sub-district;
-on described assigned frequency, measure the received signal intensity of described predefine message at least one travelling carriage;
-to the described received signal intensity that records of central location report;
-the cell relations that produces in central location between the sub-district that this first sub-district of determining and described at least one travelling carriage be positioned is estimated, and wherein said cell relations is estimated at least in part the signal strength measurement based on described report.
21. the method for claim 20, wherein said transmission interruption on described assigned frequency are to realize by redistribute other frequency that is different from described assigned frequency to the user.
22. the method for claim 20 also comprises step:
-provide the received signal intensity of the signal that the wireless hair of service send from the sub-district that is positioned at least one travelling carriage wherein at least one moving table measuring, and report these measurement results to central location.
23. the method for claim 20, wherein the transmission of the described predefine message on a definite frequency stops from least one no the end of a thread that service is provided for the described first definite sub-district, and the transmission of the second predefine message is from providing at least one no the end of a thread startup of service for second sub-district of determining on described definite frequency, second sub-district that should determine be different from described first sub-district of determining, and to repeatedly measuring, report and produce the step that cell relations is estimated from the transmission of described definite second sub-district.
24. the method for claim 22, wherein the cell relations that produces at central location is estimated the described signal strength measurement of sending here based on the wireless hair that service is provided from the sub-district that is positioned at least one travelling carriage at least in part of reporting.
25. the method for claim 20, wherein said travelling carriage are intercepted the indication of described assigned frequency and are illustrated in MAHO frequency inventory.
26. the method for claim 22, the signal that wherein provides the wireless hair of service to send from the sub-district that is positioned at least one travelling carriage sends in the frequency different with described assigned frequency.
27. the method for claim 24, wherein cell relations is estimated channel disturbance and is compared C/I.
28. the method for claim 23 wherein is that all possible sub-district is to collecting described cell relations measurement result and placing it in the cell relations matrix in the appointed area.
29. the method for claim 20, wherein said predefine message is not carried any information.
30. a cellular communication system comprises:
-a plurality of sub-districts wherein provide wireless coverage by at least one no the end of a thread to each sub-district;
-one central location that is connected with a plurality of no the end of a thread;
-be used for from described central location to the lose one's life device of order of a plurality of wireless hairs that are attached thereto, comprise the order of the no the end of a thread of at least one indication transmission predefine message on time of determining and the frequency determined in the wherein said order;
-be used for sending one in the time of determining with the frequency determined is measured and to the device of central location report signal intensity order to travelling carriage from described central location;
-be used for the device of the expression of the measurement result carried out at a plurality of travelling carriages at least in the storage of described central location.
31. a travelling carriage that is connected with cellular system comprises:
-be used on assigned frequency, receiving the device that measure signal intensity is indicated from central location in the time of determining;
-be used for the device that receives the measure signal intensity indication from central location in the time of determining being different from the frequency of described assigned frequency;
-be used on described assigned frequency device in the time measurement signal intensity of determining;
-being used to measure from the signal strength signal intensity of the signal that the wireless hair of service send is provided for sub-district, described travelling carriage place, wherein said signal sends being different from the frequency of described assigned frequency.
-be used for the device that described cell relations measurement result is estimated and reported to described central location to calculation plot relation.
32. in the communication system that can be divided into a plurality of sub-districts, determine the method for cell relations, comprise step:
-comprise an inventory of distributing to the wireless frequency of void cell at least to the transmission of the travelling carriage in a plurality of sub-districts;
-measure signal intensity at least one wireless frequency channel;
-signal strength measurement at least one wireless frequency channel is handled, so that determine the relation of each sub-district in void cell and a plurality of sub-district.
33. the method for claim 32 is wherein carried out signal strength measurement at void cell.
34. the method for claim 32 is wherein carried out signal strength measurement at travelling carriage.
35. the method for claim 32, wherein travelling carriage sends signal at least one wireless frequency channel.
36. the method for claim 32, wherein travelling carriage received signal at least one wireless frequency channel.
37. the method for claim 32, wherein travelling carriage is carried out MAHO (MAHO), and wherein uses the MAHO-inventory to send inventory to travelling carriage.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6032697P | 1997-09-29 | 1997-09-29 | |
| US60/060,326 | 1997-09-29 | ||
| US16212498A | 1998-09-29 | 1998-09-29 | |
| US09/162,124 | 1998-09-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1280751A true CN1280751A (en) | 2001-01-17 |
Family
ID=26739810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98811670 Pending CN1280751A (en) | 1997-09-29 | 1998-09-29 | Method and arrangement for generation of cell relations in a mobile communications by system |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1020092A1 (en) |
| CN (1) | CN1280751A (en) |
| AU (1) | AU9595898A (en) |
| BR (1) | BR9812840A (en) |
| CA (1) | CA2304511A1 (en) |
| WO (1) | WO1999017573A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388806C (en) * | 2005-07-04 | 2008-05-14 | 上海原动力通信科技有限公司 | Method for managing wireless resource in multi-carrier-wave high-speed down-link grouped accessing system |
| CN100411486C (en) * | 2005-07-18 | 2008-08-13 | 上海原动力通信科技有限公司 | Method for high speed doward link grouping cut-in process physical resource configurated with multiple frequency point small zone |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6487414B1 (en) * | 2000-08-10 | 2002-11-26 | Schema Ltd. | System and method for frequency planning in wireless communication networks |
| IL198100A (en) * | 2009-04-07 | 2016-08-31 | Intucell Ltd | Method and system for obtaining radio access network (ran) information of a cellular telecommunications network |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE469580B (en) * | 1992-08-18 | 1993-07-26 | Televerket | PROCEDURE MAKES C / I DENSITY ESTIMATE AND INTERFERENCE LIKELIHOOD |
| CN1128093A (en) * | 1994-03-18 | 1996-07-31 | 菲利浦电子有限公司 | A spread-spectrum based cellular mobile radio system, and a control arrangement, a radio base station, and a mobile radio station |
| US5878328A (en) * | 1995-12-21 | 1999-03-02 | At&T Wireless Services, Inc. | Method and apparatus for wireless communication system organization |
-
1998
- 1998-09-29 CN CN 98811670 patent/CN1280751A/en active Pending
- 1998-09-29 AU AU95958/98A patent/AU9595898A/en not_active Abandoned
- 1998-09-29 EP EP98949685A patent/EP1020092A1/en not_active Withdrawn
- 1998-09-29 WO PCT/US1998/020617 patent/WO1999017573A1/en not_active Application Discontinuation
- 1998-09-29 CA CA002304511A patent/CA2304511A1/en not_active Abandoned
- 1998-09-29 BR BR9812840-0A patent/BR9812840A/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388806C (en) * | 2005-07-04 | 2008-05-14 | 上海原动力通信科技有限公司 | Method for managing wireless resource in multi-carrier-wave high-speed down-link grouped accessing system |
| CN100411486C (en) * | 2005-07-18 | 2008-08-13 | 上海原动力通信科技有限公司 | Method for high speed doward link grouping cut-in process physical resource configurated with multiple frequency point small zone |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1020092A1 (en) | 2000-07-19 |
| CA2304511A1 (en) | 1999-04-08 |
| WO1999017573A1 (en) | 1999-04-08 |
| AU9595898A (en) | 1999-04-23 |
| BR9812840A (en) | 2000-08-08 |
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