CN103052102B - Terminal, base station, channel measuring method, pilot frequency design arrange System and method for - Google Patents

Terminal, base station, channel measuring method, pilot frequency design arrange System and method for Download PDF

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Publication number
CN103052102B
CN103052102B CN201310020963.3A CN201310020963A CN103052102B CN 103052102 B CN103052102 B CN 103052102B CN 201310020963 A CN201310020963 A CN 201310020963A CN 103052102 B CN103052102 B CN 103052102B
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described
base station
according
moving speed
relative moving
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CN201310020963.3A
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Chinese (zh)
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CN103052102A (en
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曹卿
曹一卿
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东莞宇龙通信科技有限公司
宇龙计算机通信科技(深圳)有限公司
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Abstract

The invention provides a kind of base station, including: pilot tone selects unit, at least one terminal of at least one terminal to report in receiving the community that base station covers and the relative moving speed of base station, relative moving speed threshold value is calculated according to relative moving speed and default capabilities loss rate, the coherence time corresponding with relative moving speed threshold value is calculated, according to arranging public guide frequency pattern coherence time according to relative moving speed threshold value;Control unit, for by public guide frequency pattern transmission to terminal, measuring channel information for terminal according to public guide frequency pattern.The invention allows for a kind of terminal, a kind of pilot frequency design arranges system, a kind of channel measuring method and a kind of pilot frequency design method to set up.Pass through technical scheme, it is possible on the premise of ensureing systematic function, efficiently reduce the expense of public guide frequency.

Description

Terminal, base station, channel measuring method, pilot frequency design arrange System and method for

Technical field

The present invention relates to mobile communication technology field, in particular to a kind of terminal, a kind of base station, a kind of pilot patterns Case arranges system, a kind of channel measuring method and a kind of pilot frequency design method to set up.

Background technology

Demand (3GPP, TR25.913) according to operator, 3GPP LTE protocol need support speed be up to 350 kms/ Hour mobile terminal.Bigger Doppler frequency shift is had, in order to ensure certain channel between terminal and the base station of high-speed mobile Estimating performance, system should be less than, for the reference marks time interval of channel measurement, the coherence time that Doppler frequency shift is corresponding. In 3GPP LTE protocol designs, according to maximum, system supports that terminal velocity (350,000 ms/h) carrys out design reference symbol, i.e. Identical reference marks form (3GPP TS36.211) is all used for any community.

Using the mobile communication in the vehicles such as LTE technical support high-speed railway, aircraft, bus is sector application Focus.These vehicle run at different rates, simultaneously within user moving speed relatively low (substantially static).Now, Vehicle interior forms the community of a group mobility, by vehicle by wireless backhaul links and control base station contacts. In this community, the translational speed of terminal is relatively low, and the reference marks design as using with normal cells obviously there is no need, Also carrier resource can be caused waste.

In prior art, there is a kind of scheme and select public guide frequency pattern according to the average speed of terminal, but this feelings Under condition, it is less than the time interval of two adjacent public guide frequencies higher than the channel coherency time of the mobile terminal of average speed, it is impossible to Make channel accurately according to public guide frequency measurement result to estimate.

Accordingly, it would be desirable to a kind of new pilot frequency design arranges technology, it is possible on the premise of ensureing systematic function, effectively subtract The expense of few public guide frequency.

Summary of the invention

The present invention is based on the problems referred to above, it is proposed that a kind of pilot frequency design arranges technology, it is possible to ensureing systematic function On the premise of, efficiently reduce the expense of public guide frequency.

In view of this, the present invention proposes a kind of terminal, is in the community that base station covers, including: velocity measuring unit, For measuring the relative moving speed of described terminal and described base station, and described relative moving speed is reported described base station;Lead Frequently measuring unit, for receiving the public guide frequency pattern that described base station is arranged according to described relative moving speed, and according to described Channel information measured by public guide frequency pattern.

In technique scheme, it is preferable that described velocity measuring unit is according to level crossing rate and/or Doppler frequency spectrum Measure described relative moving speed.

In technique scheme, it is preferable that described velocity measuring unit is according to prefixed time interval, or receiving When stating the collection signal of base station, measure described relative moving speed.

In any of the above-described technical scheme, it is preferable that wireless backhaul links is passed through with described in the community that described base station covers Base station communicates.

The invention allows for a kind of base station, including: pilot tone selects unit, in receiving the community that described base station covers The relative moving speed of at least one terminal described and described base station of at least one terminal to report, according to described relative movement Speed and default capabilities loss rate calculate relative moving speed threshold value, calculate and institute according to described relative moving speed threshold value State the coherence time that relative moving speed threshold value is corresponding, public guide frequency pattern is set according to described coherence time;Control unit, For by described public guide frequency pattern transmission to described terminal, measuring channel for described terminal according to described public guide frequency pattern Information.

In this technical scheme, owing to existing base station is all terminal velocity (the such as 3GPP LTE supported according to maximum In agreement, the maximum terminal velocity supported is 350,000 ms/h) public guide frequency pattern is set, and it practice, cover in base station Community in, and not all terminal all with maximum support speed relative to base station movement, such as the base station in coffee-house, turn round and look at Terminal entrained by visitor moves with client, the least with the relative moving speed of base station (i.e. absolute velocity), or on train Base station, the terminal entrained by passenger in train moves with passenger, the least with the relative moving speed of base station, in above-mentioned situation Under, if arranging base station to arrange public guide frequency pattern according to the terminal velocity of maximum support, base station can be made continually to community Interior all terminal pilot signal transmitteds, cause the waste of carrier resource.

And by calculating relative moving speed door according to relative moving speed and the default capabilities loss rate of terminal with base station Limit value, can determine a public guide frequency pattern according to the speed of terminal each in community, the performance of terminal in guaranteeing community On the premise of, make base station with suitable frequency all terminal pilot signal transmitteds in community, greatly save public guide frequency Expense.

In technique scheme, it is preferable that it is described that described pilot tone selects unit to determine according to described relative moving speed The cumulative distribution function of relative moving speed, according to described cumulative distribution function and described default capabilities loss rate meter Calculate described relative moving speed threshold value.

In this technical scheme, base station can be pre-set after receiving the relative moving speed of terminal, according to relatively Translational speed generates the curve of cumulative distribution function (i.e. CDF), (such as sets according to the performance loss rate pre-set simultaneously Put in all terminals, have the terminal of 5% cannot accurately carry out channel estimation, then performance loss rate is 5%) can in above-mentioned curve To determine a relative moving speed value, i.e. relative moving speed threshold value.

In technique scheme, it is preferable that described pilot tone select unit arrange described base station send pilot signal time Between interval less than or equal to described coherence time, according to described time interval, described public guide frequency pattern is set.

In this technical scheme, when being calculated corresponding relevant of this translational speed threshold value according to translational speed threshold value Between, according to maximum, such as 5ms, supports that the coherence time that speed obtains is relatively big relative in prior art, such as 0.1ms.For protecting Card base station sends the time interval of pilot signal and is less than or equal to this coherence time, therefore can arrange base station and send every 5ms Pilot tone, sends a pilot tone relative in prior art every 0.1ms, dramatically saves on resource consumption, decrease public affairs The expense of pilot tone altogether.

In any of the above-described technical scheme, it is preferable that wireless backhaul links is passed through with described in the community that described base station covers Base station communicates.

The invention allows for a kind of pilot frequency design and system is set, including: base station and the community being in the covering of described base station At least one interior terminal, wherein, at least one terminal described includes: velocity measuring unit, is used for measuring described terminal and institute State the relative moving speed of base station, and described relative moving speed is reported described base station;Pilot measurement unit, is used for receiving From the public guide frequency pattern of described base station, and measure channel information according to described public guide frequency pattern;And described base station includes: Pilot tone selects unit, is used for receiving described relative moving speed, according to described relative moving speed and default capabilities loss rate meter Calculate relative moving speed threshold value, calculate and described relative moving speed threshold value pair according to described relative moving speed threshold value The coherence time answered, according to arranging described public guide frequency pattern described coherence time;Control unit, for by described public guide frequency Pattern transmission is to described terminal.

In this technical scheme, owing to existing base station is all terminal velocity (the such as 3GPP LTE supported according to maximum In agreement, the maximum terminal velocity supported is 350,000 ms/h) public guide frequency pattern is set, and it practice, cover in base station Community in, and not all terminal all with maximum support speed relative to base station movement, such as the base station in coffee-house, turn round and look at Terminal entrained by visitor moves with client, the least with the relative moving speed of base station (i.e. absolute velocity), or on train Base station, the terminal entrained by passenger in train moves with passenger, the least with the relative moving speed of base station, in above-mentioned situation Under, if arranging base station to arrange public guide frequency pattern according to the terminal velocity of maximum support, base station can be made continually to community Interior all terminal pilot signal transmitteds, cause the waste of carrier resource.

And by calculating relative moving speed door according to relative moving speed and the default capabilities loss rate of terminal with base station Limit value, can determine a public guide frequency pattern according to the speed of terminal each in community, the performance of terminal in guaranteeing community On the premise of, make base station with suitable frequency all terminal pilot signal transmitteds in community, greatly save public guide frequency Expense.

In technique scheme, it is preferable that described velocity measuring unit is according to level crossing rate and/or Doppler frequency spectrum Measure described relative moving speed.

In technique scheme, it is preferable that described velocity measuring unit is according to prefixed time interval, or receiving When stating the collection signal of base station, measure described relative moving speed.

In technique scheme, it is preferable that described pilot tone selects unit to determine described phase according to described relative moving speed Cumulative distribution function to translational speed, calculates according to described cumulative distribution function and described default capabilities loss rate Described relative moving speed threshold value.

In this technical scheme, base station can be pre-set after receiving the relative moving speed of terminal, according to relatively Translational speed generates the curve of cumulative distribution function (i.e. CDF), (such as sets according to the performance loss rate pre-set simultaneously Put in all terminals, have the terminal of 5% cannot accurately carry out channel estimation, then performance loss rate is 5%) can in above-mentioned curve To determine a relative moving speed value, i.e. relative moving speed threshold value.

In technique scheme, it is preferable that described pilot tone select unit arrange described base station send pilot signal time Between interval less than or equal to described coherence time, according to described time interval, described public guide frequency pattern is set.

In this technical scheme, when being calculated corresponding relevant of this translational speed threshold value according to translational speed threshold value Between, according to maximum, such as 5ms, supports that the coherence time that speed obtains is relatively big relative in prior art, such as 0.1ms.For protecting Card base station sends the time interval of pilot signal and is less than or equal to this coherence time, therefore can arrange base station and send every 5ms Pilot tone, sends a pilot tone relative in prior art every 0.1ms, dramatically saves on resource consumption, decrease public affairs The expense of pilot tone altogether.

In any of the above-described technical scheme, it is preferable that wireless backhaul links is passed through with described in the community that described base station covers Base station communicates.

The invention allows for a kind of channel measuring method, including step 402, be in community that base station covers extremely A few terminal measures the relative moving speed of at least one terminal described and described base station, and by described relative moving speed Report described base station;Step 404, described terminal receives the public guide frequency figure that described base station is arranged according to described relative moving speed Case, and measure channel information according to described public guide frequency pattern.

In technique scheme, it is preferable that described step 402 includes: at least one terminal described is according to level cross Rate and/or Doppler frequency spectrum measure described relative moving speed.

In technique scheme, it is preferable that described step 402 includes: described terminal according to prefixed time interval, or When receiving the collection signal of described base station, measure described relative moving speed.

In any of the above-described technical scheme, it is preferable that wireless backhaul links is passed through with described in the community that described base station covers Base station communicates.

The invention allows for a kind of pilot frequency design method to set up, including: step 502, base station receives described base station and covers Community at least one terminal to report, the relative moving speed of described at least one terminal and described base station;Step 504, described base station calculates relative moving speed threshold value, according to institute according to described relative moving speed and default capabilities loss rate State relative moving speed threshold value and calculate the coherence time corresponding with described relative moving speed threshold value, and according to described relevant Set of time public guide frequency pattern;Step 506, described base station is by described public guide frequency pattern transmission extremely described terminal, for institute State terminal and measure channel information according to described public guide frequency pattern.

In this technical scheme, owing to existing base station is all terminal velocity (the such as 3GPP LTE supported according to maximum In agreement, the maximum terminal velocity supported is 350,000 ms/h) public guide frequency pattern is set, and it practice, cover in base station Community in, and not all terminal all with maximum support speed relative to base station movement, such as the base station in coffee-house, turn round and look at Terminal entrained by visitor moves with client, the least with the relative moving speed of base station (i.e. absolute velocity), or on train Base station, the terminal entrained by passenger in train moves with passenger, the least with the relative moving speed of base station, in above-mentioned situation Under, if arranging base station to arrange public guide frequency pattern according to the terminal velocity of maximum support, base station can be made continually to community Interior all terminal pilot signal transmitteds, cause the waste of carrier resource.

And by calculating relative moving speed door according to relative moving speed and the default capabilities loss rate of terminal with base station Limit value, can determine a public guide frequency pattern according to the speed of terminal each in community, the performance of terminal in guaranteeing community On the premise of, make base station with suitable frequency all terminal pilot signal transmitteds in community, greatly save public guide frequency Expense.

In technique scheme, it is preferable that described step 504 includes: described base station is according to described relative moving speed Determine the cumulative distribution function of described relative moving speed, according to described cumulative distribution function and described default capabilities Loss rate calculates described relative moving speed threshold value.

In this technical scheme, base station can be pre-set after receiving the relative moving speed of terminal, according to relatively Translational speed generates the curve of cumulative distribution function (i.e. CDF), (such as sets according to the performance loss rate pre-set simultaneously Put in all terminals, have the terminal of 5% cannot accurately carry out channel estimation, then performance loss rate is 5%) can in above-mentioned curve To determine a relative moving speed value, i.e. relative moving speed threshold value.

In technique scheme, it is preferable that described step 504 includes: described base station arranges described base station and sends pilot tone The time interval of signal is less than or equal to described coherence time, arranges described public guide frequency pattern according to described time interval.

In this technical scheme, when being calculated corresponding relevant of this translational speed threshold value according to translational speed threshold value Between, according to maximum, such as 5ms, supports that the coherence time that speed obtains is relatively big relative in prior art, such as 0.1ms.For protecting Card base station sends the time interval of pilot signal and is less than or equal to this coherence time, therefore can arrange base station and send every 5ms Pilot tone, sends a pilot tone relative in prior art every 0.1ms, dramatically saves on resource consumption, decrease public affairs The expense of pilot tone altogether.

In any of the above-described technical scheme, it is preferable that wireless backhaul links is passed through with described in the community that described base station covers Base station communicates.

By above technical scheme, it is possible on the premise of ensureing systematic function, efficiently reduce the expense of public guide frequency.

Accompanying drawing explanation

Fig. 1 shows the block diagram of terminal according to an embodiment of the invention;

Fig. 2 shows the block diagram of base station according to an embodiment of the invention;

Fig. 3 shows that pilot frequency design according to an embodiment of the invention arranges the block diagram of system;

Fig. 4 shows the flow chart of channel measuring method according to an embodiment of the invention;

Fig. 5 shows the flow chart of pilot frequency design method to set up according to an embodiment of the invention;

Fig. 6 shows the particular flow sheet of pilot frequency design method to set up according to an embodiment of the invention;

Fig. 7 shows data transmission between base station and terminal during pilot frequency design arranges system according to an embodiment of the invention Schematic diagram.

Detailed description of the invention

In order to be more clearly understood that the above-mentioned purpose of the present invention, feature and advantage, real with concrete below in conjunction with the accompanying drawings The present invention is further described in detail by mode of executing.It should be noted that in the case of not conflicting, the enforcement of the application Feature in example and embodiment can be mutually combined.

Elaborate a lot of detail in the following description so that fully understanding the present invention, but, the present invention also may be used Implementing to use other to be different from other modes described here, therefore, protection scope of the present invention is not by described below The restriction of specific embodiment.

Fig. 1 shows the block diagram of terminal according to an embodiment of the invention.

As it is shown in figure 1, terminal 100 according to an embodiment of the invention, it is in the community that base station covers, including: speed Measuring unit 102, for the relative moving speed of measuring terminals 100 with base station, and by relative moving speed reporting base station;Pilot tone Measuring unit 104, for receiving the public guide frequency pattern that base station is arranged according to relative moving speed, and according to public guide frequency pattern Measure channel information.

Preferably, velocity measuring unit 102 measures relative moving speed according to level crossing rate and/or Doppler frequency spectrum.

Preferably, velocity measuring unit 102 is according to prefixed time interval, or when receiving the collection signal of base station, surveys Amount relative moving speed.

Terminal 100 can be set and measure the relative moving speed with base station at regular intervals, and in the data that will record Report base station, it is also possible to terminal 100 is set and only measures the relative movement speed with base station again when signal or the instruction receiving base station Degree, it is simple to user is configured as required.

Preferably, the community that base station covers is communicated with base station by wireless backhaul links.

Fig. 2 shows the block diagram of base station according to an embodiment of the invention.

As in figure 2 it is shown, base station 200 includes according to an embodiment of the invention: pilot tone selects unit 202, is used for receiving base At least one terminal of at least one terminal to report stood in 200 communities covered and the relative moving speed of base station, according to phase Translational speed and default capabilities loss rate are calculated relative moving speed threshold value, according to relative moving speed threshold value calculate with The coherence time that relative moving speed threshold value is corresponding, according to arranging public guide frequency pattern coherence time;Control unit 204, uses In by public guide frequency pattern transmission to terminal, measure channel information for terminal according to public guide frequency pattern.

Owing to existing base station is all that the terminal velocity according to maximum support (in such as 3GPP LTE protocol, support by maximum Terminal velocity be 350,000 ms/h) public guide frequency pattern is set, and it practice, in the community that base station 200 covers, not With maximum, all terminals all support that speed moves relative to base station 200, such as the base station 200 in coffee-house, client is taken The terminal of band moves with client, the least with the relative moving speed of base station 200 (i.e. absolute velocity), or for the base station on train 200, the terminal entrained by passenger in train moves with passenger, the least with the relative moving speed of base station 200, in above-mentioned feelings Under condition, if arranging base station 200 to arrange public guide frequency pattern according to the terminal velocity of maximum support, base station 200 can be made frequent All terminal pilot signal transmitteds in Di Xiang community, cause the waste of carrier resource.

And by calculating relative moving speed according to relative moving speed and the default capabilities loss rate of terminal with base station 200 Threshold value, can determine a public guide frequency pattern according to the speed of terminal each in community, the property of terminal in guaranteeing community On the premise of energy, make base station 200 with suitable frequency all terminal pilot signal transmitteds in community, greatly save public leading The expense of frequency.

Preferably, pilot tone selects unit 202 to determine the cumulative probability distribution of relative moving speed according to relative moving speed Function, calculates relative moving speed threshold value according to cumulative distribution function and default capabilities loss rate.

Base station 200 can be pre-set after receiving the relative moving speed of terminal, generate according to relative moving speed The curve of cumulative distribution function (i.e. CDF), (such as arranges all terminals according to the performance loss rate pre-set simultaneously In, have the terminal of 5% cannot accurately carry out channel estimation, then performance loss rate is 5%) in above-mentioned curve, may determine that one Relative moving speed value, i.e. relative moving speed threshold value.

Preferably, pilot tone selects unit 202 to arrange base station 200 and sends the time interval of pilot signal less than or equal to relevant Time, public guide frequency pattern is set according to time interval.

It is calculated the coherence time that this translational speed threshold value is corresponding, such as 5ms, relatively according to translational speed threshold value In prior art, support that the coherence time that speed obtains is relatively big according to maximum, such as 0.1ms.Lead for ensureing that base station 200 sends Frequently the time interval of signal is less than or equal to this coherence time, therefore can arrange base station 200 and send a pilot tone every 5ms, Send a pilot tone relative in prior art every 0.1ms, dramatically saves on resource consumption, decrease opening of public guide frequency Pin.

Preferably, the community that base station 200 covers is communicated with base station 200 by wireless backhaul links.

Fig. 3 shows that pilot frequency design according to an embodiment of the invention arranges the block diagram of system.

As it is shown on figure 3, pilot frequency design arranges system 300 and includes according to an embodiment of the invention: base station 200 and be in base Stand 200 cover communities at least one terminal 100, wherein, at least one terminal 100 includes: velocity measuring unit 102, For the relative moving speed of measuring terminals 100 with base station 200, and by relative moving speed reporting base station 200;Pilot measurement list Unit 104, for receiving the public guide frequency pattern from base station 200, and measures channel information according to public guide frequency pattern;And base Stand and 200 include: pilot tone selects unit 202, is used for receiving relative moving speed, lose according to relative moving speed and default capabilities Rate calculates relative moving speed threshold value, calculates corresponding with relative moving speed threshold value according to relative moving speed threshold value Coherence time, according to arranging public guide frequency pattern coherence time;Control unit 204, for transmitting public guide frequency pattern to end End 100.

Owing to existing base station is all that the terminal velocity according to maximum support (in such as 3GPP LTE protocol, support by maximum Terminal velocity be 350,000 ms/h) public guide frequency pattern is set, and it practice, in the community that base station 200 covers, not With maximum, all terminals 100 all support that speed moves relative to base station 200, such as the base station 200, Gu Kesuo in coffee-house The terminal 100 carried moves with client, the least with the relative moving speed of base station 200 (i.e. absolute velocity), or on train Base station 200, the terminal 100 entrained by the passenger in train moves with passenger, with the relative moving speed of base station 200 the most very Little, in these cases, if arranging base station 200 to arrange public guide frequency pattern according to the terminal velocity of maximum support, can make Base station 200 all terminals 100 pilot signal transmitted in community continually, causes the waste of carrier resource.

And by calculating relative movement according to relative moving speed and the default capabilities loss rate of terminal 100 with base station 200 Speed threshold value, can determine a public guide frequency pattern, in guaranteeing community according to the speed of terminal 100 each in community On the premise of the performance of terminal 100, make base station 200 with suitable frequency all terminal 100 pilot signal transmitteds, pole in community The earth saves the expense of public guide frequency.

Preferably, velocity measuring unit 102 measures relative moving speed according to level crossing rate and/or Doppler frequency spectrum.

Preferably, velocity measuring unit 102 is according to prefixed time interval, or when receiving the collection signal of base station 200, Measure relative moving speed.

Terminal 100 can be set and measure the relative moving speed with base station 200, and the data that will record at regular intervals Reporting base station 200, it is also possible to terminal 100 is set and only measures again and base station 200 when signal or the instruction receiving base station 200 Relative moving speed, it is simple to user is configured as required.

Preferably, pilot tone selects unit 202 to determine the cumulative probability distribution of relative moving speed according to relative moving speed Function, calculates relative moving speed threshold value according to cumulative distribution function and default capabilities loss rate.

Base station 200 can be pre-set after the relative moving speed receiving terminal 100, raw according to relative moving speed Become the curve of cumulative distribution function (i.e. CDF), according to the performance loss rate pre-set, (all terminals are such as set simultaneously In 100, the terminal 100 of 5% is had cannot accurately to carry out channel estimation, then performance loss rate is 5%) can be true in above-mentioned curve Fixed a relative moving speed value, i.e. relative moving speed threshold value.

Preferably, pilot tone selects unit 202 to arrange base station 200 and sends the time interval of pilot signal less than or equal to relevant Time, public guide frequency pattern is set according to time interval.

It is calculated the coherence time that this translational speed threshold value is corresponding, such as 5ms, relatively according to translational speed threshold value In prior art, support that the coherence time that speed obtains is relatively big according to maximum, such as 0.1ms.Lead for ensureing that base station 200 sends Frequently the time interval of signal is less than or equal to this coherence time, therefore can arrange base station 200 and send a pilot tone every 5ms, Send a pilot tone relative in prior art every 0.1ms, dramatically saves on resource consumption, decrease opening of public guide frequency Pin.

Preferably, the community that base station 200 covers is communicated with base station 200 by wireless backhaul links.

Fig. 4 shows the flow chart of channel measuring method according to an embodiment of the invention.

As shown in Figure 4, channel measuring method includes according to an embodiment of the invention: step 402, is in what base station covered At least one terminal in community measures the relative moving speed of at least one terminal and base station, and is reported by relative moving speed Base station;Step 404, terminal receives the public guide frequency pattern that base station is arranged according to relative moving speed, and according to public guide frequency figure Case measures channel information.

Preferably, step 402 includes: at least one terminal is measured relatively according to level crossing rate and/or Doppler frequency spectrum Translational speed.

Preferably, step 402 includes: terminal is according to prefixed time interval, or when receiving the collection signal of base station, surveys Amount relative moving speed.

Terminal can be set and measure the relative moving speed with base station at regular intervals, and the data recorded are reported base Stand, it is also possible to terminal is set and only measures the relative moving speed with base station again when signal or the instruction receiving base station, it is simple to User is configured as required.

Preferably, the community that base station covers is communicated with base station by wireless backhaul links.

Fig. 5 shows the flow chart of pilot frequency design method to set up according to an embodiment of the invention.

As it is shown in figure 5, pilot frequency design method to set up includes according to an embodiment of the invention: step 502, base station receives base At least one terminal of at least one terminal to report stood in the community covered and the relative moving speed of base station;Step 504, base Stand and calculate relative moving speed threshold value, according to relative moving speed thresholding according to relative moving speed and default capabilities loss rate Value calculates the coherence time corresponding with relative moving speed threshold value, and according to arranging public guide frequency pattern coherence time;Step 506, base station, by public guide frequency pattern transmission to terminal, measures channel information for terminal according to public guide frequency pattern.

Owing to existing base station is all that the terminal velocity according to maximum support (in such as 3GPP LTE protocol, support by maximum Terminal velocity be 350,000 ms/h) public guide frequency pattern is set, and it practice, in the community that base station covers, not institute Have terminal all with maximum support speed relative to base station movement, such as the base station in coffee-house, the terminal entrained by client Move with client, the least with the relative moving speed of base station (i.e. absolute velocity), or for the base station on train, taking advantage of in train Terminal entrained by visitor moves with passenger, the least with the relative moving speed of base station, in these cases, if arranging base station Public guide frequency pattern is set according to the terminal velocity of maximum support, the base station all terminals in community continually can be made to send Pilot signal, causes the waste of carrier resource.

And by calculating relative moving speed door according to relative moving speed and the default capabilities loss rate of terminal with base station Limit value, can determine a public guide frequency pattern according to the speed of terminal each in community, the performance of terminal in guaranteeing community On the premise of, make base station with suitable frequency all terminal pilot signal transmitteds in community, greatly save public guide frequency Expense.

Preferably, step 504 includes: base station determines the cumulative probability distribution of relative moving speed according to relative moving speed Function, calculates relative moving speed threshold value according to cumulative distribution function and default capabilities loss rate.

Base station can be pre-set after receiving the relative moving speed of terminal, generate accumulation according to relative moving speed The curve of probability-distribution function (i.e. CDF), (such as arranges in all terminals according to the performance loss rate pre-set, has simultaneously The terminal of 5% cannot accurately carry out channel estimation, then performance loss rate is 5%) in above-mentioned curve, may determine that one relatively Translational speed value, i.e. relative moving speed threshold value.

Preferably, step 504 includes: base station arranges base station and sends the time interval of pilot signal less than or equal to time relevant Between, according to time interval, public guide frequency pattern is set.

It is calculated the coherence time that this translational speed threshold value is corresponding, such as 5ms, relatively according to translational speed threshold value In prior art, support that the coherence time that speed obtains is relatively big according to maximum, such as 0.1ms.For ensureing that base station sends pilot tone letter Number time interval less than or equal to this coherence time, therefore base station can be set and send a pilot tone every 5ms, relative to existing Have in technology and send a pilot tone every 0.1ms, dramatically saves on resource consumption, decrease the expense of public guide frequency.

Preferably, the community that base station covers is communicated with base station by wireless backhaul links.

Fig. 6 shows the particular flow sheet of pilot frequency design method to set up according to an embodiment of the invention.

As shown in Figure 6, the specifically including of pilot frequency design method to set up according to an embodiment of the invention:

Step 602, the one or more terminals being in base station service area, it is spaced to schedule or is receiving base During the collection signal stood, measure the relative moving speed of self and base station, and the data recorded are transmitted to base station;

Step 604, base station is according to carrying out the relative moving speed of self terminal, and preset algorithm determines relative moving speed door Limit value VT, and T coherence time of correspondence is determined according to relative moving speed threshold valueT, then according to T coherence time obtainedTIf Put the pattern (i.e. public guide frequency pattern) of common reference symbol, and the pattern of common reference symbol is transmitted to terminal;

Step 606, terminal is measured channel according to the pattern of the common reference symbol received, is obtained corresponding channel performance Information.

Specifically, can be sent by base station all terminals in service area and collect signal, obtain all each phases recorded To translational speed, then obtaining relative moving speed and determine cumulative distribution function curve (i.e. CDF), base station is according to setting in advance Fixed rule (such as CDF5%, in all terminals, has the terminal of 5% cannot make channel exactly and estimates) obtains the relative of correspondence Translational speed threshold value VT, base station is according to VTObtain T coherence time of correspondenceT, and according to T coherence timeTThe public ginseng of corresponding setting Examine the time interval (i.e. the pattern of common reference symbol) of symbol, and notify terminal.

Fig. 7 shows data transmission between base station and terminal during pilot frequency design arranges system according to an embodiment of the invention Schematic diagram.

As it is shown in fig. 7, the terminal 100 in the service area of base station 200 is spaced to schedule or is receiving base station 200 Collection signal time, velocity measuring unit 102 measures the relative moving speed of self and base station 200, and the data that will record pass Transport to base station 200.Pilot tone selects unit 202 according to receiving relative moving speed and preset algorithm obtains relative moving speed door Limit value, and determine corresponding coherence time according to relative moving speed threshold value, then according to selecting public guide frequency coherence time Pattern, the public guide frequency pattern that pilot tone is selected unit 202 to select by control unit 204 transmits to terminal 100, pilot measurement unit 104 measure channel information according to the public guide frequency pattern received.

It should be noted that base station 200 can carry out data transmission with multiple terminals 100, and according to from each simultaneously The data of terminal 100 determine public guide frequency pattern.

Technical scheme is described in detail, it is contemplated that in correlation technique, in community above in association with accompanying drawing Terminal, the reference marks design as using with normal cells, extremely waste carrier resource.By technical scheme, The expense of public guide frequency can be efficiently reduced on the premise of ensureing systematic function.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (19)

1. a terminal, it is characterised in that be in the community that base station covers, including:
Velocity measuring unit, for measuring the relative moving speed of described terminal and described base station, and by described relative movement speed Degree reports described base station;
Pilot measurement unit, for receiving what described base station was arranged according to the described relative moving speed of at least one terminal to report Public guide frequency pattern, and measure channel information according to described public guide frequency pattern;
Wherein, described public guide frequency pattern is to be determined described relative moving speed by described base station according to described relative moving speed Cumulative distribution function, calculate described relative movement speed according to described cumulative distribution function and default capabilities loss rate Degree threshold value, according to described relative moving speed threshold value calculate corresponding with described relative moving speed threshold value relevant time Between, and according to arranging described coherence time.
Terminal the most according to claim 1, it is characterised in that described velocity measuring unit according to level crossing rate and/or Doppler frequency spectrum measures described relative moving speed.
Terminal the most according to claim 1, it is characterised in that described velocity measuring unit according to prefixed time interval, or When receiving the collection signal of described base station, measure described relative moving speed.
Terminal the most according to any one of claim 1 to 3, it is characterised in that nothing is passed through in the community that described base station covers Line return link communicates with described base station.
5. a base station, it is characterised in that including:
Pilot tone select unit, for receive described base station cover community at least one terminal to report described at least one Terminal and the relative moving speed of described base station, calculate relative movement according to described relative moving speed and default capabilities loss rate Speed threshold value, according to described relative moving speed threshold value calculate corresponding with described relative moving speed threshold value relevant time Between, according to described coherence time, public guide frequency pattern is set;
Control unit, for by the transmission of described public guide frequency pattern to described terminal, public lead according to described for described terminal Frequently channel information measured by pattern;
Wherein, described pilot tone selects unit to determine that the cumulative probability of described relative moving speed is divided according to described relative moving speed Cloth function, calculates described relative moving speed thresholding according to described cumulative distribution function and described default capabilities loss rate Value.
Base station the most according to claim 5, it is characterised in that described pilot tone selects unit to arrange described base station and sends pilot tone The time interval of signal is less than or equal to described coherence time, arranges described public guide frequency pattern according to described time interval.
7. according to the base station described in claim 5 or 6, it is characterised in that the community that described base station covers is by wireless backhaul chain Road communicates with described base station.
8. a pilot frequency design arranges system, it is characterised in that including: base station and be in described base station cover community in extremely A few terminal, wherein, at least one terminal described includes:
Velocity measuring unit, for measuring the relative moving speed of described terminal and described base station, and by described relative movement speed Degree reports described base station;
Pilot measurement unit, for receiving the public guide frequency pattern from described base station, and surveys according to described public guide frequency pattern Amount channel information;And
Described base station includes:
Pilot tone selects unit, is used for receiving described relative moving speed, loses according to described relative moving speed and default capabilities Rate calculates relative moving speed threshold value, calculates and described relative moving speed thresholding according to described relative moving speed threshold value The coherence time that value is corresponding, according to arranging described public guide frequency pattern described coherence time;
Control unit, for by described public guide frequency pattern transmission extremely described terminal;
Wherein, described pilot tone selects unit to determine that the cumulative probability of described relative moving speed is divided according to described relative moving speed Cloth function, calculates described relative moving speed thresholding according to described cumulative distribution function and described default capabilities loss rate Value.
Pilot frequency design the most according to claim 8 arranges system, it is characterised in that described velocity measuring unit is according to level Crossing-over rate and/or Doppler frequency spectrum measure described relative moving speed.
Pilot frequency design the most according to claim 8 arranges system, it is characterised in that described velocity measuring unit is according in advance If time interval, or when receiving the collection signal of described base station, measure described relative moving speed.
11. pilot frequency designs according to claim 8 arrange system, it is characterised in that described pilot tone selects unit to arrange institute State base station and send the time interval of pilot signal less than or equal to described coherence time, described public affairs are set according to described time interval Pilot frequency design altogether.
12. arrange system to the pilot frequency design according to any one of 11 according to Claim 8, it is characterised in that described base station is covered The community of lid is communicated with described base station by wireless backhaul links.
13. 1 kinds of channel measuring methods, it is characterised in that including:
Step 402, is at least one terminal in the community that base station covers and measures at least one terminal described and described base station Relative moving speed, and described relative moving speed is reported described base station;
Step 404, described terminal receives what described base station was arranged according to the described relative moving speed of at least one terminal to report Public guide frequency pattern, and measure channel information according to described public guide frequency pattern;
Wherein, described public guide frequency pattern is to be determined described relative moving speed by described base station according to described relative moving speed Cumulative distribution function, calculate described relative movement speed according to described cumulative distribution function and default capabilities loss rate Degree threshold value, according to described relative moving speed threshold value calculate corresponding with described relative moving speed threshold value relevant time Between, and according to arranging described coherence time.
14. channel measuring methods according to claim 13, it is characterised in that described step 402 includes: described at least one Individual terminal measures described relative moving speed according to level crossing rate and/or Doppler frequency spectrum.
15. channel measuring methods according to claim 13, it is characterised in that described step 402 includes: described terminal is pressed According to prefixed time interval, or when receiving the collection signal of described base station, measure described relative moving speed.
16. according to the channel measuring method according to any one of claim 13 to 15, it is characterised in that described base station covers Community is communicated with described base station by wireless backhaul links.
17. 1 kinds of pilot frequency design methods to set up, it is characterised in that including:
Step 502, base station receives at least one terminal to report in the community that described base station covers, at least one terminal described Relative moving speed with described base station;
Step 504, described base station calculates relative moving speed thresholding according to described relative moving speed and default capabilities loss rate Value, calculates the coherence time corresponding with described relative moving speed threshold value, and root according to described relative moving speed threshold value According to described coherence time, public guide frequency pattern is set;
Step 506, described base station is by described public guide frequency pattern transmission extremely described terminal, for described terminal according to described public Pilot frequency design measures channel information;
Wherein, described step 504 includes: described base station determines the tired of described relative moving speed according to described relative moving speed Long-pending probability-distribution function, calculates described relative movement speed according to described cumulative distribution function and described default capabilities loss rate Degree threshold value.
18. pilot frequency design methods to set up according to claim 17, it is characterised in that described step 504 includes: described base Station arranges described base station and sends the time interval of pilot signal less than or equal to described coherence time, sets according to described time interval Put described public guide frequency pattern.
19. according to the pilot frequency design method to set up described in claim 17 or 18, it is characterised in that the community that described base station covers Communicated with described base station by wireless backhaul links.
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CN104144039B (en) * 2014-08-15 2017-11-28 东南大学 Pilot distribution method based on coherence time in a kind of extensive mimo system
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