CN102573069A - Distribution method of sounding sequence and base station - Google Patents

Distribution method of sounding sequence and base station Download PDF

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CN102573069A
CN102573069A CN2010105763542A CN201010576354A CN102573069A CN 102573069 A CN102573069 A CN 102573069A CN 2010105763542 A CN2010105763542 A CN 2010105763542A CN 201010576354 A CN201010576354 A CN 201010576354A CN 102573069 A CN102573069 A CN 102573069A
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terminal
base station
type
distance
estimating
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CN102573069B (en
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刘敏
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams

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Abstract

The invention provides a distribution method of a sounding sequence and a base station. The method comprises the following steps that: a base station estimates a distance between a terminal and the base station according to a channel condition feedbacked by the terminal; the base station determines the type of the terminal based on the estimated distance, wherein the type of the terminal at least includes: a near-point terminal type and a far-point terminal type; and the base station distributes a sounding sequence for the terminal according to the type of the terminal. According to the invention, an interference at an uplink sounding zone can be reduced. Meanwhile, the demodulation demand of a base station side can be met; the gain of downlink forming can be obtained; and it can be guaranteed that downlink beam forming is carried out successfully.

Description

The distribution method of detection sequence and base station
Technical field
The present invention relates to the communications field, in particular to the distribution method and the base station of a kind of detection (Sounding) sequence.
Background technology
OFDM inserts (Orthogonal Frequency Division Multiple Access; OFDMA) be a kind of special multi-carrier transmission technology; It transmits through going here and there, become and also changing to be assigned to data flow at a high speed in the experimental process channel; Improve spectrum efficiency significantly, effectively anti-multipath is disturbed and narrow band interference, become one of core technology of next generation mobile communication system.WIMAX, promptly worldwide interoperability for microwave access adopts the OFDMA technology to be its physics core technology and WIMAX802.16e standard that take into account mobility and broadband characteristics, becomes the strong competitor of next generation mobile communication standard.
Wave beam forming (Beam-Forming; BF) be a kind of closely spaced aerial array multi-antenna transmitting transferring technology that is applied to; Its cardinal principle is to utilize the strong correlation of space channel and the antenna pattern that the wave interference principle produces highly directive; The main lobe that makes antenna pattern is the directed towards user arrival bearing adaptively, thereby improves signal to noise ratio, improves power system capacity or coverage.
Though the directional diagram of array antenna is omnidirectional, the output of array but can make the directive gain of array received accumulate on the direction after weighted sum, is equivalent to form a wave beam.It is exactly that wave beam forms that this handle carries out the process that weighted merges from the signal of different array elements.The first sketch map that produces wave beam of even linear linear array as shown in Figure 1, its Mathematical Modeling can be described below:
The data of supposing input are s 1... S n, weights are w 1... W nSystem, it is output as:
Figure BDA0000036564000000011
, here, T is a transposition, w=[w 1... W n] T, s (t)=[s 1... S n] T
Why antenna is called " smart antenna ", is the weight vectors w of antenna array 1... W nDirectional diagram that can the control antenna battle array, beam shaping Base-Band Processing sketch map as shown in Figure 2 carries out beam shaping after data channel coding in the data source, the modulation, then through the OFDM modulation treatment, forms the different wave beams that point to.Weight factor can be carried out the optimization adjustment according to adaptive algorithm, so that current transmission environment is mated.
Wave beam forming directly is based upon on the basis of channel parameter, for up link (UL, Up Link), owing to can obtain the real-time or cycle estimation of reliable channel, therefore can adopt the empty time domain parameter of channel to carry out wave beam forming, to improve uplink performance.For down link (DL, Down Link),, condition restriction realizes estimating for the reliable and real-time of channel because being difficult in down link.System for tdd mode; Under the very little condition of up-downgoing channel spacing time slot; Can be similar to and think that channel does not change, thereby can use the estimated value of the empty time domain parameter of channel that obtains by upstream data, even can directly use the data of uplink beam figuration at down link.Because therefore the shared identical band resource of uplink and downlink under tdd mode can carry out down channel through up Sounding sequence and estimate.
The Sounding sequence is a kind of Channel Detection mechanism; According to describing in the 802.16e agreement; BS (Base Station, base station) requires some MS (Mobile Subscriber, mobile subscriber) on the specific frequency range of up channel, to send the sounding waveform; After BS receives this waveform, judge the channel impulse response of the down channel of estimating BS-to-MS according to waveform.BS measures the up channel response through sounding, and the response that the result is converted into the down channel that will estimate, need carry out suitable check and correction at the hardware of transmitting-receiving two-end.The Sounding sequence of describing in the agreement can be divided into two kinds, type A and type B.Both differences are on the method for salary distribution to the subcarrier of sounding Zone (zone).Type A is divided into the wave band (band) of non-overlapping copies to the subcarrier in the Sounding Zone, and each band comprises 18 continuous sub-carriers.Specify MS on the wave band of appointment, to send the sounding waveform then.Type B is according to common sub-carrier distribution manner---and be allocation unit with the subchannel, specify MS on subchannel of confirming and symbol, to send.Whether base station and terminal support Type A Sounding or Type B Sounding, through SBC in the access procedure of terminal (System Broadcast Channel, system broadcast channel) capability negotiation, CSIT capability (ability) are obtained the result of common factor.
TYPE category-A type is divided into Cyclic (cyclic shift) and two kinds of sequence modes of Decim ation (a carrier wave numerical value extracts); For CSIT capability A; If the separability type (separability type) during ULSounding Command is IE (uplink detection command cell) is 0; Expression Sounding sequence is the Cyclic mode, and the terminal adopts the mode of cyclic shift to distinguish on the frequency band of Sounding region allocation.Separability type is 1, expression Sounding sequence D ecimation mode, and the expression terminal is sent the Sounding sequence and is distinguished through bits of offset.
Beam shaping BF technology is the multi-antenna technology that carries out the downlink wave beam excipient through uplink channel estimation, therefore needs to rely on up resource and channel condition and just can carry out beam shaping.Up channel estimating is called weights and estimates; The Sounding sequence is that a kind of up weights of key are estimated mode; The detection of Sounding sequence is conciliate straightening and is connect the gain that has influence on descending excipient; And the Sounding sequence is not pass through information encoded, can't restore in case information is interfered, and then influence downlink wave beam excipient process.
Summary of the invention
Main purpose of the present invention is to provide a kind of distribution method and base station of detection sequence, to reduce the interference problem in above-mentioned up Sounding zone.
According to an aspect of the present invention, a kind of distribution method of detection sequence is provided, this method comprises: the distance of terminal and base station is estimated in the base station according to the channel condition of terminal feedback; The type at terminal is confirmed according to the distance of estimating in this base station, and the type at this terminal comprises at least: near point terminal and far point terminal; This base station is the terminal distribution detection sequence according to the type at terminal.
According to a further aspect in the invention, a kind of base station is provided, has comprised:, be used for estimating the distance of terminal and base station according to the channel condition of terminal feedback apart from acquisition module; The type determination module, according to the type of confirming the terminal apart from the distance of acquisition module estimation, the type at terminal comprises at least: near point terminal and far point terminal; The detection sequence distribution module, the type that is used for according to the definite terminal of type determination module is the terminal distribution detection sequence.
Through the present invention, carry out detection sequence according to the distance of terminal and base station and distribute, reduced the interference in up Sounding zone, can satisfy the demodulation of base station side simultaneously again, the gain of obtaining descending excipient has ensured carrying out smoothly of downlink wave beam excipient.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is according to the first sketch map that produces wave beam of the even linear linear array of correlation technique;
Fig. 2 is the beam shaping Base-Band Processing sketch map according to correlation technique;
Fig. 3 is the flow chart according to the distribution method of the detection sequence of the embodiment of the invention 1;
Fig. 4 is the flow chart of the distribution method of detection sequence when inserting according to the terminal initial of the embodiment of the invention 2;
Fig. 5 is the flow chart that inserts the distribution method of back detection sequence according to the terminal of the embodiment of the invention 2;
Fig. 6 is the structured flowchart according to the base station of the embodiment of the invention 3.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
The embodiment of the invention considers that existing terminal do not support the independent power control in Sounding zone, reduces the interference in Sounding zone in the whole net through the Sounding sequence allocation, can satisfy the demodulation of base station side simultaneously again, obtains descending excipient gain.
Embodiment 1
Fig. 3 shows the flow chart of the distribution method of the detection sequence (Sounding sequence) according to the embodiment of the invention, and this method may further comprise the steps:
Step S302, the distance of terminal and base station is estimated in the base station according to the channel condition of terminal feedback;
For example, the terminal initial access network, the distance of terminal and base station is measured in the base station according to the reception signal strength signal intensity indication (RSSI, Received Signal Strength Indication) of terminal feedback.The signal power of RSSI can be used for the distance of measured signal point and acceptance point, can position calculating according to corresponding data again.The RSSI of present embodiment terminal feedback can represent with DLRSSI, i.e. down receiving signal intensity.
Step S304, the above-mentioned distance that this base station obtains according to estimation is confirmed the type at above-mentioned terminal, in the present embodiment, the type at terminal comprises at least: near point terminal and far point terminal;
During concrete the realization, can in the base station, set a fixing value as first set point, if the distance of estimation greater than first set point, the base station confirms that the terminal is the near point terminal; If the distance of estimating is less than or equal to first set point, the base station confirms that the terminal is the far point terminal.
Preferably, in order to reach more preferably noise reduction purpose, can be far and near according to the distance of terminal and base station, the type at terminal is divided three classes, i.e. near point terminal, far point terminal and middle point terminal; Simultaneously, on the base station, set two values, be respectively, first set point and second set point, based on this, the base station confirms that according to the distance of estimating the type at terminal comprises:
If the distance of estimating is greater than first set point, the base station confirms that the terminal is the near point terminal;
If the distance of estimating is less than second set point, the base station confirms that the terminal is the far point terminal;
If the distance of estimating is less than or equal to first set point, and distance is more than or equal to second set point, and the base station confirms that the terminal is middle point terminal.
Step S306, this base station is this terminal distribution detection sequence according to the type at above-mentioned terminal.
Timing is divided carrying out detection sequence in the base station of present embodiment, and the corresponding Configuration Values of detection sequence is searched according to the type at the terminal of confirming in the base station; Wherein, Configuration Values is that the base station is set according to the type at terminal in advance, comprises extraction spacing value and the symbol of detection sequence use in the carrier wave number extraction mode; Then, this base station is the corresponding detection sequence of symbol that above-mentioned extraction spacing value of terminal distribution and detection sequence use.
Consider that the terminal has mobility; Distance between itself and base station also can change, and present embodiment divides timing carrying out detection sequence, on the base station, is provided with the judgement cycle; Be used for not having the type at terminal is adjudicated, to upgrade the distribution of detection sequence at a distance from a period of time.Based on this; Behind the accessing terminal to network; This base station is after the terminal distribution detection sequence according to the type at terminal; Said method also comprises: this base station judges in each judgement cycle whether the type at terminal changes, if be that detection sequence is redistributed at the terminal according to the type at the terminal after changing.
Wherein, the base station is judged in each judgement cycle whether the type at terminal changes and is comprised:
After reaching when the leading decision cycle, the mean value R of the RSSI at the terminal of statistics in the current determination cycles is calculated in the base station i, i is the integer greater than 1; Calculate R I-1With R iMean square deviation, wherein, R I-1Mean value for the RSSI at the terminal added up in the last judgement cycle in leading decision cycle; If mean square deviation is greater than the deviation threshold value of setting, the base station confirms that the type at this terminal changes; If mean square deviation is not more than the deviation threshold value of setting, the base station confirms that the type at this terminal does not change.
The base station comprises for the terminal distribution detection sequence according to the type at terminal: the detection sequence Indication message is sent to the terminal in the base station, and wherein, the detection sequence Indication message carries the detection sequence indication information of distribution.After this terminal receives the detection sequence Indication message, will send detection sequence according to the detection sequence indication information.
The Sounding sequence allocating method of present embodiment is applicable to TYPE category-A type and TYPE category-B type, is preferably applied in the TYPE category-A type.Wherein, TYPE category-A type is divided into Cyclic and Decimation; The different sequences type is different with the subcarrier number that different configurating terminals sends the Sounding sequence, considers that the Cyclic mode requires terminal transmit power high, can use said method in the Decimation mode.
Sequence offset D value in the Decimation mode representes on the symbol to send user's number of Sounding sequence.The D value is big more, and the Sounding user that can distribute on symbol is many more, and the Sounding sequence carrier number of each CU is few more; And the D value is more little, and the number of users that can distribute on symbol is few more, and the Sounding sequence carrier number of each CU is many more.The transmitting power at terminal is limited, and the CINR (signal to noise ratio) in Sounding zone arrives the demodulation that certain threshold value could satisfy base station side, reaches the gain of downlink wave beam tax preferably.Therefore present embodiment adopts the distribution of control terminal Sounding sequence, makes the terminal limited transmitting power of far point also can satisfy the emission of Sounding sequence, and the near point user also can reach best excipient gain simultaneously.
Present embodiment carries out detection sequence according to the distance of terminal and base station and distributes, and has reduced the interference in Sounding zone in the whole net, can satisfy the demodulation of base station side simultaneously again, and the gain of obtaining descending excipient has ensured carrying out smoothly of downlink wave beam excipient.
Embodiment 2
Present embodiment provides a kind of distribution method of detection sequence, and in this method, the Sounding sequence that base station and terminal room use is the Decimation mode in the TYPE category-A type.The channel condition of present embodiment through the terminal (for example, RSSI) estimate the distance of terminal and base station side, the terminal is divided into far, in, nearly three Terminal Types.The base station is before the distribution of carrying out detection sequence; Divide Sounding Zone: the base station is the information of the up Sounding Zone of initialization at first; Sounding Zone is assigned as 3 symbols; Three symbol Sounding sequence types of Sounding Zone are fixed, and are decided to be different D values respectively, and three different D values of symbol are kept for the user in far point zone, midpoint area, near point zone respectively.Certainly when not having the user to distribute the Sounding sequence, uply need not divide Sounding Zone, so that save uplink bandwidth resource.
Because terminal transmit power is limited; Far point terminal path loss is big, and inevitable terminal transmit power is high, in order to satisfy the base station side demodulation; Distribute power that need the terminal is limited is on less carrier wave; Avoid terminal transmit power saturated, therefore for the Sounding sequence of far point terminal distribution is the Decimation mode of Type category-A type, D value value is greater than M;
For middle point terminal, near from the base station than the far point terminal, simultaneously for the adjacent area distance, disturb for a short time, the Sounding carrier number that can distribute is more, and the power at terminal also can satisfy the emission of Sounding sequence, can be with the D value value [M, N] of middle point terminal.
For the near point terminal, its path loss is little, and there is not saturated problem in terminal transmit power, and adjacent area interference simultaneously is little, in order to reach maximum beam shaping gain, can distribute more D value values less than N the Sounding carrier number.The base station is respectively three types the different symbol of terminal configuration, and above-mentioned corresponding relation is as shown in table 1.
Table 1
Symbol 1 Symbol 2 Symbol 3
D＜N N＜D＜M D＞M
The near point terminal Middle point terminal The far point terminal
Based on above-mentioned corresponding relation, Fig. 4 shows the distribution method flow chart of the detection sequence of present embodiment, and this method may further comprise the steps:
Step S402, terminal initial access network, terminal to report DLRSSI;
Step S404, the DLRSSI mean value of base station counting statistics;
Step S406, base station judges DLRSSI whether＞the first set point F, if, execution in step S408; If not, execution in step S410;
Step S408, the base station confirms that this terminal is the near point terminal;
Step S410, base station judges DLRSSI whether＜the second set point L, if, execution in step S412; If not, execution in step S414;
Step S412, the base station confirms that this terminal is the far point terminal;
Step S414, the base station confirms that this terminal is middle point terminal;
Step S416, the base station is surveyed (Sounding) sequence according to the type at terminal for this terminal distribution.
Wherein, F and L are the thresholding of two DLRSSI being provided with in advance of base station, be divided between distance regions far away in nearly 3 points.Wherein, far point terminal: DLRSSI＜F; Middle point terminal: DLRSSI is between [F, L]; Near point terminal: DLRSSI＞L.
Referring to Fig. 5, behind the base station access by terminal, in the running, distribute the concrete steps of Sounding sequence following:
Step S502, base station side is received the DLRSSI of terminal to report, the base station obtains downstream signal intensity from DLRSSI;
Step S504, base station side arrives the judgement cycle, the mean value of the DLRSSI of base station computing cycle statistics;
Step S506, base station side is confirmed the type at terminal according to the mean value of DLRSSI;
According to the interval that DLRSSI falls into, estimate the distance of terminal and base station, if DLRSSI＜L judges that then the terminal is the far point terminal, if F＜DLRSSI＜L judges that then the terminal is middle point terminal, if DLRSSI＞F judges that then the terminal is the near point terminal.
Step S508 judges whether the type at terminal changes, if, execution in step S510, if not, execution in step S512.
Whether the type of judging the terminal changes, and can adopt: the RSSI1 sample that will preserve last time and the RSSI2 sample of recent statistics are asked mean square deviation, if variance surpasses the deviation thresholding X that sets, explain that variation has taken place the type at terminal; Otherwise, explain that the type at terminal does not change.
Step S510, base station side indicating terminal stop original Sounding sequence and send, for redistributing the Sounding sequence in this terminal;
Step S512 finishes.
Present embodiment is divided three classes the type at terminal; Sounding sequence configuration information according to three types of correspondences is a terminal distribution Sounding sequence; Make the terminal limited transmitting power can satisfy the emission of Sounding sequence; Satisfy the demodulation requirement of base station side, reduced the interference in Sounding zone in the whole net simultaneously.
Embodiment 3
Fig. 6 shows the structured flowchart according to the base station of the embodiment of the invention, and this base station comprises:
Apart from acquisition module 62, be used for estimating the distance of terminal and base station according to the channel condition of terminal feedback;
The terminal initial access network indicates RSSI to measure the distance of said terminal and said base station apart from acquisition module 62 according to the reception signal strength signal intensity of terminal feedback;
Type determination module 64 and links to each other apart from acquisition module 62, confirms the type at terminal according to the distance of estimating apart from acquisition module 62, and the type at terminal comprises at least: near point terminal and far point terminal;
Detection sequence distribution module 66 links to each other with type determination module 64, and the type at the terminal that is used for confirming according to type determination module 64 is the terminal distribution detection sequence.
Type determination module 64 comprises:
First confirms the unit, if the distance that is used for estimating confirms that greater than first set point terminal is the near point terminal; If the distance of estimating is less than or equal to first set point, confirm that the terminal is the far point terminal.
Perhaps, if the type at terminal also comprise in during point terminal, the type at the terminal that type determination module 64 is confirmed also comprises: middle point terminal; Based on this, type determination module 64 comprises:
Second confirms the unit, if the distance that is used for estimating confirms that greater than first set point terminal is the near point terminal; If the distance of estimating confirms that less than second set point terminal is the far point terminal; If the distance of estimating is less than or equal to first set point, and distance confirms that more than or equal to second set point terminal is middle point terminal.
Detection sequence distribution module 66 comprises:
Search the unit, be used for searching the corresponding Configuration Values of detection sequence according to the type at the terminal of confirming; Wherein, Configuration Values is that the base station is set according to the type at terminal in advance, comprises extraction spacing value (being above-mentioned D value) and the symbol of detection sequence use in the carrier wave number extraction mode;
Allocation units are used to the corresponding detection sequence of symbol that above-mentioned extraction spacing value of terminal distribution and detection sequence use.
The base station of present embodiment judges in each judgement cycle whether the type at terminal changes, if be that detection sequence is redistributed at the terminal according to the type at the terminal after changing.For example, after reaching when the leading decision cycle, the mean value R of the RSSI at the terminal of statistics in the current determination cycles is calculated in the base station i, i is the integer greater than 1; Calculate R I-1With R iMean square deviation, wherein, R I-1Mean value for the RSSI at the terminal added up in the last judgement cycle in leading decision cycle; If mean square deviation is greater than the deviation threshold value of setting, the base station confirms that the type at terminal changes; If mean square deviation is not more than the deviation threshold value of setting, the base station confirms that the type at terminal does not change.
The base station of present embodiment also comprises: sending module, be used for sending the detection sequence Indication message to the terminal, and wherein, the detection sequence Indication message carries the detection sequence indication information of distribution.
Present embodiment carries out detection sequence according to the distance of terminal and base station and distributes, and has reduced the interference in Sounding zone in the whole net, can satisfy the demodulation of base station side simultaneously again, and the gain of obtaining descending excipient has ensured carrying out smoothly of downlink wave beam excipient.
From above description, can find out that the BF beam shaping technology that the present invention describes is the multi-antenna technology that carries out the downlink wave beam excipient through uplink channel estimation, therefore need to rely on up resource and channel condition and just can carry out beam shaping.The present invention has reduced the interference in Sounding zone in the whole net through the Sounding sequence allocation, can satisfy the demodulation of base station side simultaneously again, obtains descending excipient gain.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation base station; They can concentrate on the single calculation base station; Perhaps be distributed on the network that a plurality of calculation base station forms, alternatively, they can be realized with the executable program code of calculation base station; Thereby; Can they be stored in the storage base station and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation base station; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (11)

1. the distribution method of a detection sequence is characterized in that, comprising:
The distance of said terminal and said base station is estimated in the base station according to the channel condition of terminal feedback;
The type at said terminal is confirmed according to the said distance of estimating in said base station, and the type at said terminal comprises at least: near point terminal and far point terminal;
Said base station is said terminal distribution detection sequence according to the type at said terminal.
2. method according to claim 1 is characterized in that, said base station estimates that according to the channel condition of terminal feedback the distance of said terminal and said base station comprises:
Terminal initial access network, base station are measured the distance of said terminal and said base station according to the reception signal strength signal intensity indication RSSI of terminal feedback.
3. method according to claim 1 is characterized in that, said base station confirms that according to the said distance of estimating the type at said terminal comprises:
If the said distance of estimating is greater than first set point, said base station confirms that said terminal is the near point terminal;
If the said distance of estimating is less than or equal to said first set point, said base station confirms that said terminal is the far point terminal.
4. method according to claim 1 is characterized in that, the type at said terminal also comprises: middle point terminal;
Said base station confirms that according to the said distance of estimating the type at said terminal comprises:
If the said distance of estimating is greater than first set point, said base station confirms that said terminal is the near point terminal;
If the said distance of estimating is less than second set point, said base station confirms that said terminal is the far point terminal;
If the said distance of estimating is less than or equal to said first set point, and said distance is more than or equal to said second set point, and said base station confirms that said terminal is middle point terminal.
5. method according to claim 1 is characterized in that, said base station is that said terminal distribution detection sequence comprises according to the type at said terminal:
The corresponding Configuration Values of detection sequence is searched according to the type at the said terminal of confirming in said base station; Wherein, said Configuration Values is that the base station is set according to the type at terminal in advance, comprises extraction spacing value and the symbol of detection sequence use in the carrier wave number extraction mode;
Said base station is the corresponding detection sequence of symbol that said extraction spacing value of said terminal distribution and detection sequence use.
6. method according to claim 1 is characterized in that, behind the said accessing terminal to network, said base station is after the said terminal distribution detection sequence according to the type at said terminal, and said method also comprises:
Said base station judges in each judgement cycle whether the type at said terminal changes, if be that detection sequence is redistributed at said terminal according to the type at the said terminal after changing.
7. method according to claim 6 is characterized in that, said base station is judged in each judgement cycle whether the type at said terminal changes and comprised:
After reaching when the leading decision cycle, the mean value R of the RSSI at the said terminal of statistics in the said current determination cycles is calculated in said base station i, i is the integer greater than 1;
Calculate R I-1With R iMean square deviation, wherein, R I-1Be said mean value of working as the RSSI at the said terminal of adding up in the last judgement cycle in leading decision cycle;
If said mean square deviation is greater than the deviation threshold value of setting, said base station confirms that the type at said terminal changes;
If said mean square deviation is not more than the deviation threshold value of said setting, said base station confirms that the type at said terminal does not change.
8. according to each described method of claim 1-7, it is characterized in that said base station is that said terminal distribution detection sequence comprises according to the type at said terminal:
The detection sequence Indication message is sent to said terminal in said base station, and wherein, said detection sequence Indication message carries the detection sequence indication information of said distribution.
9. a base station is characterized in that, comprising:
Apart from acquisition module, be used for estimating the distance of said terminal and said base station according to the channel condition of terminal feedback;
The type determination module is confirmed the type at said terminal according to the said said distance of estimating apart from acquisition module, and the type at said terminal comprises at least: near point terminal and far point terminal;
The detection sequence distribution module, the type that is used for according to the definite said terminal of said type determination module is said terminal distribution detection sequence.
10. base station according to claim 9 is characterized in that, said type determination module comprises:
First confirms the unit, if the said distance that is used for estimating confirms that greater than first set point said terminal is the near point terminal; If the said distance of estimating is less than or equal to said first set point, confirm that said terminal is the far point terminal.
11. base station according to claim 9 is characterized in that, the type at the said terminal that said type determination module is confirmed also comprises: middle point terminal;
Said type determination module comprises:
Second confirms the unit, if the said distance that is used for estimating confirms that greater than first set point said terminal is the near point terminal; If the said distance of estimating confirms that less than second set point said terminal is the far point terminal; If the said distance of estimating is less than or equal to said first set point, and said distance confirms that more than or equal to said second set point said terminal is middle point terminal.
CN201010576354.2A 2010-12-07 2010-12-07 Distribution method of sounding sequence and base station Active CN102573069B (en)

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PCT/CN2011/082617 WO2012075883A1 (en) 2010-12-07 2011-11-22 Sounding sequence allocation method and base station

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CN101784116A (en) * 2009-01-19 2010-07-21 华为技术有限公司 Sounding reference signal resource allocation method, system and device

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