CN101541029B - Sending method and device of measure-reference signal under state of carrier aggregation - Google Patents

Sending method and device of measure-reference signal under state of carrier aggregation Download PDF

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Publication number
CN101541029B
CN101541029B CN200910135593.1A CN200910135593A CN101541029B CN 101541029 B CN101541029 B CN 101541029B CN 200910135593 A CN200910135593 A CN 200910135593A CN 101541029 B CN101541029 B CN 101541029B
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China
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reference signals
described
srs
measuring reference
carrier wave
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CN200910135593.1A
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CN101541029A (en
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张戎
郝鹏
张禹强
王瑜新
朱鹏
喻斌
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中兴通讯股份有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports

Abstract

The invention discloses a sending method and a sending device of a measure-reference signal under state of carrier aggregation, being applied to an advanced long-term evolution system. The sending method comprises the steps: a base station configures a group or a plurality of groups of measure-reference signal configuration parameters for an uplink component carrier to be measured of user equipment (UE) under carrier aggregation and sends the parameters to the UE; and according to the received measure-reference signal configuration parameters, the UE sends the measure-reference signal to the base station. The invention can maintain the compatibility with the UE of the long-term evolution system and can optimize the property for sending measure signals of the UE of the advanced long-term evolution system when the carrier aggregation technology is adopted.

Description

The sending method of measure-reference signal under state of carrier aggregation and device

Technical field

The present invention relates to the communications field, particularly relate to a kind of state of carrier aggregation and issue the method and apparatus sending uplink measurement reference signal.

Background technology

Measuring reference signals (Sounding Reference Signal, SRS) is the signal being used for measuring radio channel information (channel state information, CSI) between a kind of terminal equipment and base station.In Long Term Evolution (Long Term Evolution, LTE) system, subscriber equipment (User Equipment, UE) according to the bandwidth that base station (e-node-B, eNB) indicates, frequency domain position, the parameter such as cycle and sub-frame offset, timed sending uplink SRS.ENB judges according to the SRS signal received the CSI that UE is up, and carries out the operations such as frequency domain selection scheduling, closed-loop power control according to the CSI obtained.

In LTE system, the SRS signal that UE sends is by a root sequence r u, vn () is carried out cyclic shift α and is obtained.Different cyclic shift α is carried out to same root sequence and just can obtain different SRS sequences, and mutually orthogonal between these SRS sequences obtained, so can use these SRS sequence allocation to different UE.In LTE, SRS sequence definition 8 cyclic shifts, are respectively: 0,1,2,3,4,5,6,7, indicate by 3bit signaling.That is, under same running time-frequency resource, the UE in community has 8 available code resources, and eNB can configure at most 8 UE and send SRS simultaneously.

In LTE system, the frequency domain bandwidth of SRS signal adopts tree to prepare.The corresponding tree of each SRS bandwidth preparation (i.e. SRS bandwidth configuration), the maximum bandwidth (or being called SRS bandwidth range) of this SRS bandwidth preparation that top SRS bandwidth (SRS-Bandwidth) is corresponding.Table 1 ~ table 4 gives the preparation of the SRS bandwidth within the scope of different upstream bandwidth.For table in SRS bandwidth preparation 1, b=0 be 0 layer, be the top of tree, the SRS bandwidth corresponding to this one deck is the bandwidth corresponding to 32 Resource Block (Resource Block, RB), be this SRS bandwidth preparation maximum SRS bandwidth; B=1 is 1 layer, and this one deck SRS bandwidth is the bandwidth that 16 RB are corresponding, and last layer SRS bandwidth splits into the SRS bandwidth of 21 layer; B=2 is 2 layers, and this one deck SRS bandwidth is the bandwidth that 8 RB are corresponding, and last layer SRS bandwidth splits into the SRS bandwidth of 22 layers; B=3 is 3 layers, and the SRS bandwidth of this one deck is the bandwidth that 4 RB are corresponding, and last layer SRS bandwidth splits into the SRS bandwidth of 23 layers, and its structure as shown in Figure 1.

In addition, in same SRS frequency band, the subcarrier of SRS signal is that interval is placed, and that is, the transmission of SRS adopts pectinate texture, and wherein the number of frequency comb (frequency comb) is 2.As shown in Figure 2, when each UE sends SRS, only use (comb=0 or comb=1) in two frequency comb, only use frequency domain index to send SRS for the subcarrier (sub-carrier) of even number or odd number corresponding to UE.This pectinate texture allows more user to send SRS signal in same SRS bandwidth.

In LTE system, base station is first for all UE in community distribute a SRS bandwidth formulatory indices C sRS, the RB number (N corresponding to current up-link bandwidth rB uL) can determine in use table 1 ~ table 4 which table, and then according to C sRSjust can determine the SRS bandwidth preparation that current area uses.For certain UE, a SRS bandwidth index B also can be distributed for it in base station sRS(or being called the index of place layer).According to the SRS bandwidth preparation in community and bandwidth index B sRS, UE just can obtain the SRS bandwidth that it uses.Such as, current area SRS bandwidth formulatory indices C sRS=1, N RB UL = 50 , Then the SRS bandwidth of current area is formulated as the second row in table 2.If current area is the bandwidth index that certain UE distributes is 1, then the SRS bandwidth of this UE accounts for 16 RB, and the position of the SRS bandwidth of this UE (i.e. the scope of maximum SRS bandwidth is 48 RB) in the scope of SRS bandwidth.

After UE obtains the SRS bandwidth of oneself, by the top signaling n sent according to eNB rRCdetermine that oneself sends the initial position of SRS.As shown in Figure 3, different n is assigned with rRCthe UE of signaling, will send SRS in the zones of different of community SRS bandwidth.

When being configured with the frequency hopping of UE, the different frequency bands in time in system SRS bandwidth is sent SRS by UE.When frequency hopping, base station can with signaling b hopthe frequency hopping bandwidth of notice UE.UE frequency-hopping mode is the different branches according to SRS bandwidth tree structure, and regions different in frequency hopping bandwidth sends SRS.Be configured to example with the system SRS bandwidth shown in Fig. 1, suppose the band width configuration index B that UE is proprietary sRS=3, then UE sends the bandwidth of SRS is 4 RB.Supposing that UE sends the original position of SRS is again n rRCthe frequency domain position of=0.So, as shown in Figure 4, base station can by configuring different b hopwith the frequency hopping bandwidth indicating UE different.

Table 1 ( 6 ≤ N RB UL ≤ 40 )

Table 2 ( 40 < N RB UL &le; 60 )

Table 3 ( 60 < N RB UL &le; 80 )

Table 4 ( 80 < N RB UL &le; 110 )

In LTE, from time domain, UE only sends SRS on last single carrier frequency division of subframe multiplexing (SingleCarrier Frequency Division Multiple Access, SC-FDMA) symbol.UE sends configuration and four relating to parameters of SRS in time domain: the cycle (T of cell-specific (cell-specific) sFC) and sub-frame offset (Δ sFC), and the cycle (T of UE special (UE-specific) sRS) and sub-frame offset (T offset).Table 5,6 sets forth cycle and the sub-frame offset of cell-specific in Frequency Division Duplexing (FDD) (Frequency Division Duplex, FDD) and time division duplex (Time Division Duplex, TDD) system.The cycle of cell-specific and sub-frame offset give the subframe position that may send SRS of all UE in community, and in other subframes, the use of last SC-FDMA symbol and the transmission of SRS have nothing to do.For srsSubframeConfiguration=7, T in table 5 sFC=5, Δ sFC={ 0,1}, has SRS resource as S in Fig. 5, figure represents base station in this sub-frame configuration, then in community, a SRS of cell-specific sends the cycle is 5 subframes, and the subframe 0 in each cycle and subframe 1 position can be used for sending SRS by UE.

Table 5:FDD sounding reference signal subframe configuration

(configuration of FDD SRS)

SrsSubframeConfiguratio n SRS configures Binary binary system ??Configuration?Period??T SFC(subframes) cycle (number of sub frames) ??Transmission??offset??Δ SFC(subframes) sub-frame offset ??0 ??0000 ??1 ??{0} ??1 ??0001 ??2 ??{0} ??2 ??0010 ??2 ??{1} ??3 ??0011 ??5 ??{0} ??4 ??0100 ??5 ??{1} ??5 ??0101 ??5 ??{2} ??6 ??0110 ??5 ??{3} ??7 ??0111 ??5 ??{0,1} ??8 ??1000 ??5 ??{2,3}

??9 ??1001 ??10 ??{0} ??10 ??1010 ??10 ??{1} ??11 ??1011 ??10 ??{2} ??12 ??1100 ??10 ??{3} ??13 ??1101 ??10 ??{0,1,2,3,4,6,8} ??14 ??1110 ??10 ??{0,1,2,3,4,5,6,??8} ??15 ??1111 ??reserved ??reserved

Table 6:TDD sounding reference signal subframe configuration

(configuration of TDD SRS)

SrsSubframeConfiguratio n SRS configures Binary binary system ??Configuration??Period?T SFC(subframes) cycle (number of sub frames) ??Transmission??offsetΔ SFC(subframes) sub-frame offset ??0 ??0000 ??5 ??{1} ??1 ??0001 ??5 ??{1,2} ??2 ??0010 ??5 ??{1,3} ??3 ??0011 ??5 ??{1,4} ??4 ??0100 ??5 ??{1,2,3} ??5 ??0101 ??5 ??{1,2,4} ??6 ??0110 ??5 ??{1,3,4} ??7 ??0111 ??5 ??{1,2,3,4} ??8 ??1000 ??10 ??{1,2,6} ??9 ??1001 ??10 ??{1,3,6} ??10 ??1010 ??10 ??{1,6,7} ??11 ??1011 ??10 ??{1,2,6,8}

??12 ??1100 ??10 ??{1,3,6,9} ??13 ??1101 ??10 ??{1,4,6,7} ??14 ??1110 ??reserved ??reserved ??15 ??1111 ??reserved ??reserved

Table 7,8 sets forth in FDD and TDD system, and the SRS of UE-specific sends cycle and sub-frame offset.The cycle of UE-specific and sub-frame offset give time domain cycle and the subframe position of certain UE transmission SRS.With I in table 7 sRS=17 is example, and as shown in Figure 6, in figure, S representative sends SRS in this subframe, then the every 20ms of UE sends a SRS, and first subframe of its time-domain position in 20ms sends.

Table 7:UE Specific SRS Periodicity T sRSand Subframe Offset Configuration T offset, FDD

(cycle of FDD system UE-specific and sub-frame offset)

??SRS?Configuration??Index?I SRSSRS configuration index ??SRS?Periodicity??T SRS(ms) the SRS cycle ??SRS?Subframe?Offset??T offsefSRS is biased ??0-1 ??2 ??I SRS ??2-6 ??5 ??I SRS-2 ??7-16 ??10 ??I SRS-7 ??17-36 ??20 ??I SRS-17 ??37-76 ??40 ??I SRS-37 ??77-156 ??80 ??I SRS-77 ??157-316 ??160 ??I SRS-157 ??317-636 ??320 ??I SRS-317 ??637-1023 ??reserved ??reserved

Table 8:UE Specific SRS Periodicity T sRSand Subframe Offset Configuration T offset, TDD

(cycle of TDD system UE-specific and sub-frame offset)

??Configuration?Index??I SRSSRS configuration index ??SRS?Periodicity??T SRS(ms) the SRS cycle ??SRS?Subframe?Offset??T offsetSRS is biased ??0 ??2 ??0,1 ??1 ??2 ??0,2 ??2 ??2 ??1,2 ??3 ??2 ??0,3 ??4 ??2 ??1,3 ??5 ??2 ??0,4 ??6 ??2 ??1,4 ??7 ??2 ??2,3 ??8 ??2 ??2,4 ??9 ??2 ??3,4 ??10-14 ??5 ??I SRS-10 ??15-24 ??10 ??I SRS-15 ??25-44 ??20 ??I SRS-25 ??45-84 ??40 ??I SRS-45 ??85-164 ??80 ??I SRS-85 ??165-324 ??160 ??I SRS-165 ??325-644 ??320 ??I SRS-325 ??645-1023 ??reserved ??reserved

Senior Long Term Evolution (Long Term Evolution Advanced, LTE-Advanced) (i.e. Further Advancements for E-UTRA) is the evolution version of LTE.Except meet or more than 3GPPTR 25.913: except all related needs of " Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN) (demand of the universal land radio access web of Evolved Universal Terrestrial wireless access and evolution) ", also to meet or exceed the demand of the advanced ternational Mobile Telecommunications (IMT-Advanced) that International Telecommunication Union (ITU-R) proposes.Wherein, refer to the demand of LTE backward compatibility: the terminal of LTE can work in the network of LTE-Advanced; The terminal of LTE-Advanced can work in the network of LTE.

In addition, LTE-Advanced at the spectrum disposition of different size, should be able to work, to reach higher performance and Target peak rate under comprising the spectrum disposition (the continuous print frequency spectrum resource as 100MHz) wider than LTE.Because LTE-Advanced network needs to access LTE user, so its operational frequency bands needs to cover current LTE frequency band, this frequency range does not exist the spectral bandwidth of assignable continuous 100MHz.So LTE-Advanced needs the direct technology solved to be aggregating by several distribution continuous component carrier on different frequency bands (Component carrier) to form the operable 100MHz bandwidth of LTE-Advanced.Namely for the frequency spectrum after gathering, be divided into n component carrier, the frequency spectrum in each component carrier is continuous print.

The scheme of spectrum disposition mainly contains 3 kinds, as shown in Figure 7.Wherein, grid part is the system bandwidth with LTE compatibility, and oblique line portion is the proprietary system bandwidth of LTE-Advanced.Fig. 7 a is spectrum disposition scheme 1, refers to that the system bandwidth that LTE-Advanced spectrum disposition is defined by 1 LTE-Advanced forms, and this band is wider than the system bandwidth of LTE definition.Fig. 7 b is spectrum disposition scheme 2, refers to that the system bandwidth that LTE-Advanced spectrum disposition is defined by a LTE and the system bandwidth that multiple LTE-Advanced defines consist of carrier aggregation (carrier aggregation).Fig. 7 c is spectrum disposition scheme 3, refers to that the system bandwidth that LTE-Advanced spectrum disposition is defined by multiple LTE consists of carrier aggregation, and wherein, above-mentioned carrier aggregation can be the gathering of continuous frequency spectrum, also can be the gathering of discontinuous spectrum.LTE UE can access the frequency band of compatible LTE, and namely LTE-A UE can access the frequency band of LTE compatibility, also can access the frequency band of LTE-Advanced.

Consider the compatibility with LTE, each component carrier of LTE-Advanced all demand fulfillment can in the ability of up transmission SRS.Prior art does not also solve when adopting carrier aggregation, and how UE sends the problem of SRS at multiple upstream components carrier wave, so need design one badly can keep compatible to LTE UE, and the SRS sending method of flexible configuration LTE-Advanced UE.

Summary of the invention

The technical problem to be solved in the present invention is exactly the sending method proposing a kind of measure-reference signal under state of carrier aggregation, solves when adopting carrier aggregation, and how UE sends the problem of SRS at multiple upstream components carrier wave, and can keep compatible to LTE UE.

In order to solve the problems of the technologies described above, the invention provides a kind of sending method of measure-reference signal under state of carrier aggregation, be applied in advanced long-term evolution system, comprising:

Base station is that under carrier aggregation, subscriber equipment needs the upstream components carrier wave measured to configure one or more groups measuring reference signals configuration parameter, sends to subscriber equipment;

Subscriber equipment, according to the described measuring reference signals configuration parameter received, sends measuring reference signals to described base station.

Further, above-mentioned sending method also can have following characteristics:

Base station is that a upstream components carrier wave configures one group of measuring reference signals configuration parameter and/or configures one group of measuring reference signals configuration parameter for multiple upstream components carrier wave.

Further, above-mentioned sending method also can have following characteristics:

One group of measuring reference signals configuration parameter is sent to described subscriber equipment by base station on the downlink component carrier appointed with subscriber equipment.

Further, above-mentioned sending method also can have following characteristics:

The measuring reference signals that described measuring reference signals configuration parameter sends on collocating uplink component carrier, comprises one or more combination following:

The measuring reference signals band width configuration index of cell-specific on described upstream components carrier wave;

The measuring reference signals bandwidth index of user equipment specific on described upstream components carrier wave;

The measuring reference signals bandwidth original position of user equipment specific on described upstream components carrier wave;

Measuring reference signals cycle of cell-specific and sub-frame offset on described upstream components carrier wave;

Measuring reference signals cycle of user equipment specific and sub-frame offset on described upstream components carrier wave;

Frequency comb on described upstream components carrier wave;

Frequency hopping band width configuration on described upstream components carrier wave;

Cyclic shift on described upstream components carrier wave.

Further, above-mentioned sending method also can have following characteristics:

Subscriber equipment sends position and/or time domain according to the frequency domain that described measuring reference signals configuration parameter determines to send measuring reference signals on described upstream components carrier wave and sends position and/or measuring reference signals bandwidth and/or cyclic shift, sends measuring reference signals to described base station.

Further, above-mentioned sending method also can have following characteristics:

On a upstream components carrier wave, subscriber equipment only sends measuring reference signals on last single carrier frequency division multiplexed symbols of subframe.

In order to solve the problems of the technologies described above, the present invention also provides a kind of dispensing device of measure-reference signal under state of carrier aggregation, is applied to advanced long-term evolution system, comprises base station and subscriber equipment,

Described base station comprises connected configuration module and sending module,

Described configuration module is used for for subscriber equipment under carrier aggregation needs the upstream components carrier wave measured to configure one or more groups measuring reference signals configuration parameter;

The measuring reference signals configuration parameter that described sending module is used for configuration module configures sends to subscriber equipment;

Described subscriber equipment is used for the described measuring reference signals configuration parameter according to receiving, and sends measuring reference signals to described base station.

Further, above-mentioned dispensing device also can have following characteristics:

Described configuration module is used for being that a upstream components carrier wave configures one group of measuring reference signals configuration parameter and/or configures a group configuration parameter for multiple upstream components carrier wave.

Further, above-mentioned dispensing device also can have following characteristics:

Described sending module also for sending to described subscriber equipment by one group of measuring reference signals configuration parameter on the downlink component carrier appointed with subscriber equipment.

Further, above-mentioned dispensing device also can have following characteristics:

The measuring reference signals configuration parameter of described configuration module configuration comprises one or more combination following:

The measuring reference signals band width configuration index of cell-specific on described upstream components carrier wave;

The measuring reference signals bandwidth index of user equipment specific on described upstream components carrier wave;

The measuring reference signals bandwidth original position of user equipment specific on described upstream components carrier wave;

Measuring reference signals cycle of cell-specific and sub-frame offset on described upstream components carrier wave;

Measuring reference signals cycle of user equipment specific and sub-frame offset on described upstream components carrier wave;

Frequency comb on described upstream components carrier wave;

Frequency hopping band width configuration on described upstream components carrier wave;

Cyclic shift on described upstream components carrier wave.

Further, above-mentioned dispensing device also can have following characteristics:

Described subscriber equipment sends position and/or time domain for the frequency domain determining to send measuring reference signals according to described measuring reference signals configuration parameter on described upstream components carrier wave and sends position and/or measuring reference signals bandwidth and/or cyclic shift, sends measuring reference signals to described base station.

Further, above-mentioned dispensing device also can have following characteristics:

Described subscriber equipment for only sending measuring reference signals to base station on last single carrier frequency division multiplexed symbols of subframe.

The present invention can keep compatible to LTE UE, and the SRS that can independently configure flexibly according to demand on each upstream components carrier wave, thus the efficiency making the SRS sent out be utilized increases, namely can optimize LTE-Advanced UE and adopt the performance sending measuring-signal under carrier aggregation technology.

Accompanying drawing explanation

Fig. 1 is LTE system SRS band width configuration tree schematic diagram;

Fig. 2 is that LTE system SRS frequency pectination sends schematic diagram;

Fig. 3 is that LTE system UE is according to the top signaling n received rRCdetermine the initial strip width position sending SRS;

Fig. 4 is that LTE system UE is according to the top signaling b received hopdetermine the frequency hopping bandwidth region of SRS;

Fig. 5 is that the SRS of LTE system cell-specific sends cycle (T sFC) and sub-frame offset (Δ sFC) schematic diagram;

Fig. 6 is that the SRS of LTE system UE-specific sends cycle (T sRS) and sub-frame offset (T offset) schematic diagram;

Fig. 7 is LTE-Advanced system carrier aggregation spectrum disposition schematic diagram;

Fig. 8 is the method flow diagram of the embodiment of the present invention;

Fig. 9 is the device schematic diagram of the embodiment of the present invention.

Embodiment

Below in conjunction with drawings and the specific embodiments, the present invention is described in detail.

As shown in Figure 8, the method for the embodiment of the present invention comprises the steps:

Step 801, base station is that under carrier aggregation, UE needs the upstream components carrier wave measured to configure one or more groups SRS configuration parameter, sends to UE;

Particularly, base station can be that a upstream components carrier wave configures one group of SRS configuration parameter, also can configure one group of SRS configuration parameter for multiple upstream components carrier wave;

The SRS that described SRS configuration parameter sends on collocating uplink component carrier;

Described SRS configuration parameter including (but not limited to) following one or more:

● the SRS band width configuration index of cell-specific on described upstream components carrier wave;

● the SRS bandwidth index of UE-specific on described upstream components carrier wave;

● the SRS bandwidth original position of UE-specific on described upstream components carrier wave;

● SRS cycle of cell-specific and sub-frame offset on described upstream components carrier wave;

● SRS cycle of UE-specific and sub-frame offset on described upstream components carrier wave;

● the frequency comb (frequency comb) on described upstream components carrier wave;

● the frequency hopping band width configuration b on described upstream components carrier wave hop;

● the cyclic shift α on described upstream components carrier wave.

Further illustrate:

On a upstream components carrier wave, SRS cycle of cell-specific and sub-frame offset to give on described upstream components carrier wave all UE in community and may send the subframe position of SRS;

On a upstream components carrier wave, SRS cycle of UE-specific and sub-frame offset give a UE on described upstream components carrier wave, send SRS time domain cycle and subframe position.

Each group SRS configuration parameter sends on certain specific downlink component carrier, and particularly, one group of SRS configuration parameter is sent to described UE by base station on the downlink component carrier appointed with UE.

Step 802, UE, according to the described SRS configuration parameter received, sends SRS to described base station.

Particularly, UE sends position and/or time domain according to the frequency domain that described SRS configuration parameter determines to send SRS on described upstream components carrier wave and sends position and/or SRS bandwidth and/or cyclic shift, and sends SRS to described base station.

Particularly, on the UE described upstream components carrier wave of informing according to resource block number corresponding to upstream components carrier bandwidths and base station, the SRS band width configuration index of cell-specific determines by tabling look-up the SRS band width configuration that this upstream components carrier wave current uses;

UE, according to the UE-specific SRS bandwidth index of the SRS band width configuration of described upstream components carrier wave and the proprietary described upstream components carrier wave of UE, tables look-up and obtains its SRS bandwidth on described upstream components carrier wave;

Further, on a upstream components carrier wave, UE only sends SRS on last SC-FDMA symbol of subframe.

As shown in Figure 9, the dispensing device of the embodiment of the present invention comprises base station and UE,

Wherein, described base station comprises connected configuration module and sending module,

Described configuration module is used for for UE under carrier aggregation needs the upstream components carrier wave measured to configure one or more groups SRS configuration parameter;

The SRS configuration parameter that described sending module is used for configuration module configures sends to UE;

Described UE is used for the described SRS configuration parameter according to receiving, and sends SRS to described base station.

Described configuration module is also for configuring one group of SRS configuration parameter for a upstream components carrier wave and/or configuring one group of SRS configuration parameter for multiple upstream components carrier wave.

The SRS configuration parameter of described configuration module configuration including (but not limited to) following one or more:

The SRS band width configuration index of cell-specific on described upstream components carrier wave;

The SRS bandwidth index of UE-specific on described upstream components carrier wave;

The SRS bandwidth original position of UE-specific on described upstream components carrier wave;

SRS cycle of cell-specific and sub-frame offset on described upstream components carrier wave;

SRS cycle of UE-specific and sub-frame offset on described upstream components carrier wave;

Frequency comb on described upstream components carrier wave;

Frequency hopping band width configuration on described upstream components carrier wave;

Cyclic shift on described upstream components carrier wave.

Described sending module also for sending to described UE by each group SRS configuration parameter on the downlink component carrier appointed with UE.

Described UE sends position according to the frequency domain that described SRS configuration parameter determines to send SRS on described upstream components carrier wave and/or time domain sends position and/or SRS bandwidth, sends SRS to described base station.

On a upstream components carrier wave, described UE also for only sending SRS to base station on last SC-FDMA symbol of subframe.

Be described in detail with an embody rule example below:

In LTE-Advanced system, base station is that each upstream components carrier wave participating in carrier aggregation configures one group of SRS configuration parameter respectively, one group of corresponding downlink component carrier of SRS configuration parameter, described SRS configuration parameter is sent to UE by base station on the downlink component carrier of its correspondence; UE, according to described SRS configuration parameter, corresponding upstream components carrier wave sends SRS.

Base station is the SRS band width configuration that each upstream components carrier wave arranges a upstream components carrier-specific, described SRS configuration parameter comprise following one or more:

● the SRS band width configuration index of the cell-specific on described upstream components carrier wave;

● the SRS bandwidth index of the UE-specific on described upstream components carrier wave;

● the SRS bandwidth original position of the UE-specific on described upstream components carrier wave;

● the SRS cycle of the cell-specific on described upstream components carrier wave and sub-frame offset;

● the SRS cycle of the UE-specific on described upstream components carrier wave and sub-frame offset;

● the frequency comb on described upstream components carrier wave;

● the frequency hopping band width configuration on described upstream components carrier wave;

● the cyclic shift α on described upstream components carrier wave.

In LTE-Advanced system, first base station is the SRS bandwidth formulatory indices C that all UE in community distribute the carrier-specific (carrier-specific) of each upstream components carrier wave of access sRS, m, m represents component carrier index.For component carrier m, according to the RB number (N corresponding to this current component carrier bandwidth rB uL) from table 1 ~ table 4, select a form, and then according to C sRS, mdetermine the SRS bandwidth preparation of this upstream components carrier wave.

For certain UE, base station is the SRS bandwidth index B of its resident each upstream components allocation of carriers carrier-specific sRS, m(or being called the index of place layer), m represents component carrier index.According to the SRS bandwidth formulatory indices C of the carrier-specific of component carrier sRS, mwith the SRS bandwidth index B of UE at the carrier-specific of this component carrier sRS, m, UE obtains the SRS bandwidth that it uses on this resident carrier wave.Such as, current UE resides in No. 1 upstream components carrier wave, the SRS bandwidth formulatory indices C of the carrier-specific of its component carrier sRS, 1=1, No. 1 upstream components carrier wave RB number is 50, then the SRS bandwidth of this upstream components carrier wave is formulated as the second row in table 2.If current base station is certain UE is 1 at the SRS bandwidth index of the carrier-specific of No. 1 upstream components allocation of carriers, then this UE accounts for 16 RB at the SRS frequency band of this upstream components carrier wave, and the position of the SRS bandwidth of this UE (i.e. the scope of maximum SRS bandwidth is 48 RB) in the scope of this upstream components carrier wave SRS bandwidth.

From frequency domain, n in the SRS bandwidth that UE is informed in certain upstream components carrier transmission, the SRS configuration parameter that sends according to base station rRCbe informed in b in frequency domain initial position that this upstream components carrier wave sends SRS, the SRS configuration parameter sent according to base station hopknow the frequency hopping bandwidth region sending SRS, then UE sends SRS according to tree structure with frequency-hopping mode in described frequency hopping bandwidth region.

From time domain, UE only sends SRS on last SC-FDMA symbol of subframe;

UE sends configuration and four relating to parameters of SRS in certain upstream components carrier wave time domain: the SRS cycle (T of cell-specific on upstream components carrier wave sFC, m) and the biased (Δ of SRS sFC, m), and on upstream components carrier wave, UE-specific carrier wave SRS sends cycle (T sRS, m) and the biased (T of SRS offset, m).The SRS cycle of the cell-specific on each carrier wave and SRS are biased and give all UE residing in this upstream components carrier wave subframe position that may send SRS.For srsSubframeConfiguration=7 in table 5, then the SRS of the cell-specific of this upstream components carrier wave sends the cycle is 5 subframes, and the subframe 0 in each cycle and subframe 1 position can be used for sending SRS by UE.In each upstream components carrier wave, the SRS of UE-specific sends cycle T sRS, mwith SRS offset parameter T offset, mgive time domain cycle and the subframe position of particular UE transmission SRS.With I in table 7 sRS=17 is example, then UE every 20ms on this component carrier sends a SRS reference signal, and first subframe of its time-domain position in 20ms sends.

The present invention can ensure the compatibility of LTE-Advanced system and LTE system, makes LTE UE can access LTE-Advanced network, and keeps the flexibility to LTE-Advanced UE design.

Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.

Claims (6)

1. a sending method for measure-reference signal under state of carrier aggregation, is applied in advanced long-term evolution system, comprises:
Base station is that under carrier aggregation, subscriber equipment needs the multiple upstream components carrier waves measured to configure one group of measuring reference signals configuration parameter, and one group of measuring reference signals configuration parameter is sent to subscriber equipment on the downlink component carrier appointed with subscriber equipment;
Subscriber equipment, according to the described measuring reference signals configuration parameter received, sends measuring reference signals to described base station;
The measuring reference signals that described measuring reference signals configuration parameter sends on collocating uplink component carrier, comprises following one:
The measuring reference signals band width configuration index of cell-specific on described upstream components carrier wave;
The measuring reference signals bandwidth index of user equipment specific on described upstream components carrier wave;
The measuring reference signals bandwidth original position of user equipment specific on described upstream components carrier wave;
Measuring reference signals cycle of cell-specific and sub-frame offset on described upstream components carrier wave;
Measuring reference signals cycle of user equipment specific and sub-frame offset on described upstream components carrier wave;
Frequency comb on described upstream components carrier wave;
Frequency hopping band width configuration on described upstream components carrier wave;
Cyclic shift on described upstream components carrier wave.
2. sending method as claimed in claim 1, is characterized in that,
Subscriber equipment sends position and/or time domain according to the frequency domain that described measuring reference signals configuration parameter determines to send measuring reference signals on described upstream components carrier wave and sends position and/or measuring reference signals bandwidth and/or cyclic shift, sends measuring reference signals to described base station.
3. sending method as described in claim 2, is characterized in that,
On a upstream components carrier wave, subscriber equipment only sends measuring reference signals on last single carrier frequency division multiplexed symbols of subframe.
4. a dispensing device for measure-reference signal under state of carrier aggregation, is applied to advanced long-term evolution system, comprises base station and subscriber equipment, it is characterized in that,
Described base station comprises connected configuration module and sending module,
Described configuration module is used for for subscriber equipment under carrier aggregation needs the multiple upstream components carrier waves measured to configure a group configuration parameter;
Described sending module sends to subscriber equipment for one group of measuring reference signals configuration parameter being configured by configuration module on the downlink component carrier appointed with subscriber equipment;
Described subscriber equipment is used for the described measuring reference signals configuration parameter according to receiving, and sends measuring reference signals to described base station;
The measuring reference signals configuration parameter of described configuration module configuration comprises following one:
The measuring reference signals band width configuration index of cell-specific on described upstream components carrier wave;
The measuring reference signals bandwidth index of user equipment specific on described upstream components carrier wave;
The measuring reference signals bandwidth original position of user equipment specific on described upstream components carrier wave;
Measuring reference signals cycle of cell-specific and sub-frame offset on described upstream components carrier wave;
Measuring reference signals cycle of user equipment specific and sub-frame offset on described upstream components carrier wave;
Frequency comb on described upstream components carrier wave;
Frequency hopping band width configuration on described upstream components carrier wave;
Cyclic shift on described upstream components carrier wave.
5. dispensing device as claimed in claim 4, is characterized in that,
Described subscriber equipment sends position and/or time domain for the frequency domain determining to send measuring reference signals according to described measuring reference signals configuration parameter on described upstream components carrier wave and sends position and/or measuring reference signals bandwidth and/or cyclic shift, sends measuring reference signals to described base station.
6. dispensing device as described in claim 5, is characterized in that,
Described subscriber equipment for only sending measuring reference signals to base station on last single carrier frequency division multiplexed symbols of subframe.
CN200910135593.1A 2009-04-27 2009-04-27 Sending method and device of measure-reference signal under state of carrier aggregation CN101541029B (en)

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