CN102056302B - Method, system and equipment for sending common pilot frequency and demodulating channel on return link - Google Patents

Method, system and equipment for sending common pilot frequency and demodulating channel on return link Download PDF

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Publication number
CN102056302B
CN102056302B CN 200910237050 CN200910237050A CN102056302B CN 102056302 B CN102056302 B CN 102056302B CN 200910237050 CN200910237050 CN 200910237050 CN 200910237050 A CN200910237050 A CN 200910237050A CN 102056302 B CN102056302 B CN 102056302B
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pdcch
pilot signal
common pilot
resource unit
base station
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CN102056302A (en
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王立波
潘学明
肖国军
沈祖康
孙韶辉
张文健
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Abstract

The embodiment of the invention discloses a method for sending a common pilot frequency and demodulating a channel on a return link of a long-term evolution upgrading (LTE-A) system. The method comprises the following steps that: a base station selects a resource unit which is configured in advance and is used for sending a common pilot frequency signal on the return link from a physical resource block (PRB) occupied by a physical downside control channel (R-PDCCH) on the return link; and the common pilot frequency signal is sent to relay node (RN) equipment under the base station by using the selected resource unit, wherein the RN receives the common pilot frequency signal on the resource unit, performs channel estimation according to the common pilot frequency signal, and demodulates the R-PDCCH by using a channel estimation result. The embodiment of the invention also discloses an LTE-A communication system and equipment. By the invention, the RN can correctly receive data on the R-PDCCH.

Description

The transmission of public guide frequency and channel demodulation method, system and equipment on the back haul link
Technical field
The present invention relates to wireless communication field, relate in particular to transmission and channel demodulation method, system and the equipment of public guide frequency on a kind of back haul link.
Background technology
The base station need comprise public guide frequency and special pilot frequency for user two class pilot tones to the pilot tone that terminal sends in Long Term Evolution (LTE) system.
Public guide frequency is that full bandwidth sends, and concrete configuration is relevant with the sign (ID) of residential quarter, just in residential quarter, is identical to the pattern of this residential quarter transmission public guide frequency.(physical downlink control channel PDCCH) only can come demodulation by enough public guide frequencies to Physical Downlink Control Channel, detects simultaneously because PDCCH is a plurality of users, and as seen its pilot tone must all be to all users, and is identical.The configuration of special pilot frequency for user and each are subscriber-related, only send special pilot frequency for user in certain user's data zone.
In long-term evolution upgrading (LTE-A) system, in order to improve throughput of system and to increase network coverage, introduced via node equipment (Relay Node, RN), as shown in Figure 1, base station (eNB) links core net (CN) by wireline interface, and RN links eNB by wave point; Terminal (UE) is linked RN or eNB by wave point.
Link between RN and the base station is called backhaul (backhaul) link.ENB uses special control channel R-PDCCH to the relevant control signaling of RN transmission on the backhaul link.And this R-PDCCH is positioned at physical down link sharing channel (Physical Downlink Shared Channel, PDSCH) regional extent inside.In order to reduce the expense of public guide frequency under the multiport situation, in the PDSCH scope, will not transmit public guide frequency.
In the LTE-A system, introduced the channel quality indication reference signal (CQI-RS) that is specifically designed to channel quality measurement, and the demodulated pilot signal (DM-RS) that is used for the user data demodulation.Wherein, the frequency domain density of CQI-RS is identical with the public guide frequency density of LTE system, but the density on the time domain is very little, can be that only 10ms just sends above the OFDM symbol in certain of a subframe.DM-RS is in fact very similar with the special pilot frequency for user of LTE system, and difference mainly is the transmission that DM-RS supports a plurality of data flow of a plurality of ports, and the special pilot frequency for user of LTE system is only supported the transmission of single port single data stream.
In realizing process of the present invention, the inventor finds to exist in the prior art following technical problem:
The base station does not send public guide frequency in the LTE-A system on back haul link, make a plurality of RN of this base station can't obtain the pilot signal for demodulation R-PDCCH, and then can't utilize pilot signal to carry out channel estimating, also just can't correctly receive the data on the R-PDCCH.
Summary of the invention
The embodiment of the invention provides sending method and a kind of base station of public guide frequency on a kind of LTE-A system back haul link, is used for solving the existing RN of LTE-A system and can't obtains problem for the pilot signal of demodulation R-PDCCH.
The embodiment of the invention provides the sending method of public guide frequency on a kind of LTE-A system back haul link, and this method comprises:
If the Physical Downlink Control Channel R-PDCCH on the back haul link and the physical down link sharing channel R-PDSCH on the back haul link carry out time division multiplexing tdm, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH in the base station; If described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in the R-PDCCH zone of the shared PRB of R-PDCCH in the base station;
The base station utilizes the Resource Unit of choosing to send common pilot signal to the via node equipment RN under the described base station.
The embodiment of the invention provides a kind of base station, and this base station comprises:
Resource is chosen the unit, when being used for Physical Downlink Control Channel R-PDCCH on back haul link and the physical down link sharing channel R-PDSCH on the back haul link and carrying out time division multiplexing tdm, in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link; When described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, in the R-PDCCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link;
The pilot tone transmitting element, the Resource Unit that is used for utilizing described resource to choose unit selection sends common pilot signal to the via node equipment under this base station.
The embodiment of the invention also provides channel demodulation method, a kind of LTE-A communication system and a kind of via node equipment on a kind of LTE-A system back haul link, is used for solving the problem that the existing RN of LTE-A system can't correctly receive the data on the R-PDCCH.
The embodiment of the invention provides the channel demodulation method on a kind of LTE-A system back haul link, and this method comprises:
Via node equipment RN receives the common pilot signal that the base station sends at the pre-configured Resource Unit that is used for common pilot signal on the transmission back haul link; Described Resource Unit is that the base station is chosen as follows: if the Physical Downlink Control Channel R-PDCCH on the back haul link and the physical down link sharing channel R-PDSCH on the back haul link carry out time division multiplexing tdm, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH in the base station; If described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in the R-PDCCH zone of the shared PRB of R-PDCCH in the base station;
Described RN carries out channel estimating according to described common pilot signal, and utilizes the described R-PDCCH of channel estimation results demodulation.
The embodiment of the invention provides a kind of LTE-A communication system, and this system comprises:
The base station, when being used for Physical Downlink Control Channel R-PDCCH on back haul link and the physical down link sharing channel R-PDSCH on the back haul link and carrying out time division multiplexing tdm, in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link; When described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, in the R-PDCCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link; The Resource Unit that utilization is chosen sends common pilot signal to the via node equipment under this base station;
Via node equipment is used for receiving described common pilot signal at described Resource Unit, carries out channel estimating according to this common pilot signal, and utilizes the Physical Downlink Control Channel R-PDCCH on the channel estimation results demodulation back haul link.
The embodiment of the invention provides a kind of via node equipment, and this via node equipment comprises:
The first pilot reception unit is used for receiving the common pilot signal that the base station sends at the pre-configured Resource Unit that is used for common pilot signal on the transmission back haul link; Described Resource Unit is that the base station is chosen as follows: if the Physical Downlink Control Channel R-PDCCH on the back haul link and the physical down link sharing channel R-PDSCH on the back haul link carry out time division multiplexing tdm, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH in the base station; If described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in the R-PDCCH zone of the shared PRB of R-PDCCH in the base station;
The channel data demodulating unit is used for carrying out channel estimating according to described common pilot signal, and utilizes the Physical Downlink Control Channel R-PDCCH on the channel estimation results demodulation back haul link.
Among the present invention, the base station is in the shared PRB of R-PDCCH, choose for the Resource Unit that sends common pilot signal on the back haul link, utilize this Resource Unit to send common pilot signal to the via node equipment under this base station, RN receives common pilot signal at this Resource Unit, and carry out channel estimating according to the common pilot signal that receives, and then utilize data on the channel estimation results demodulation R-PDCCH, thereby guaranteed that the common pilot signal on the back haul link is sent, and the via node equipment under the base station is the data on the demodulation R-PDCCH correctly, reach the purpose of correct reception R-PDCCH.
Description of drawings
Fig. 1 is the structural representation of LTE-A system in the prior art;
The method flow schematic diagram that Fig. 2 provides for the embodiment of the invention;
Fig. 3 arranges schematic diagram for public guide frequency in the LTE system;
Fig. 4 is channel FDM schematic diagram in the LTE-A system;
Fig. 5 is channel TDM schematic diagram in the LTE-A system;
Fig. 6 A is that public guide frequency arranges schematic diagram in the embodiment of the invention one;
Fig. 6 B is that public guide frequency arranges schematic diagram in the embodiment of the invention two;
Fig. 6 C is that public guide frequency arranges schematic diagram in the embodiment of the invention three;
Fig. 6 D is that pilot tone arranges schematic diagram in the embodiment of the invention four;
Fig. 7 A is that public guide frequency arranges schematic diagram in the embodiment of the invention five;
Fig. 7 B is that public guide frequency arranges schematic diagram in the embodiment of the invention six;
Fig. 7 C is that public guide frequency arranges schematic diagram in the embodiment of the invention seven;
Fig. 7 D is that public guide frequency arranges schematic diagram in the embodiment of the invention eight;
Fig. 8 A is that public guide frequency arranges schematic diagram in the embodiment of the invention nine;
Fig. 8 B is that public guide frequency arranges schematic diagram in the embodiment of the invention ten;
Fig. 8 C is that public guide frequency arranges schematic diagram in the embodiment of the invention 11;
Fig. 8 D is that public guide frequency arranges schematic diagram in the embodiment of the invention 12;
Fig. 9 A is that public guide frequency arranges schematic diagram in the embodiment of the invention 13;
Fig. 9 B is that public guide frequency arranges schematic diagram in the embodiment of the invention 14;
Fig. 9 C is that public guide frequency arranges schematic diagram in the embodiment of the invention 15;
Fig. 9 D is that public guide frequency arranges schematic diagram in the embodiment of the invention 16;
The system configuration schematic diagram that Figure 10 provides for the embodiment of the invention;
The architecture of base station schematic diagram that Figure 11 provides for the embodiment of the invention;
The RN structural representation that Figure 12 provides for the embodiment of the invention.
Embodiment
In order to make RN in the LTE-A system can correctly receive the data on the R-PDCCH, the embodiment of the invention provides transmission and the channel demodulation method of public guide frequency on a kind of LTE-A system back haul link, in this method, pre-configured for the Resource Unit that sends common pilot signal on the back haul link in the shared Physical Resource Block of R-PDCCH (PRB), the base station utilizes the Resource Unit of configuration to send common pilot signal to RN, RN utilizes the common pilot signal that receives to carry out channel estimating, and then according to the data on the channel estimation results demodulation R-PDCCH.
Referring to Fig. 2, transmission and the channel demodulation method of public guide frequency on the LTE-A system back haul link that the embodiment of the invention provides specifically may further comprise the steps:
Step 20: in the shared Physical Resource Block PRB of the Physical Downlink Control Channel R-PDCCH of base station on back haul link, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link;
Step 21: the base station utilizes the Resource Unit of choosing to send common pilot signal to the via node equipment under this base station;
Step 22:RN receives common pilot signal at described Resource Unit;
Step 23:RN carries out channel estimating according to the common pilot signal that receives, and utilizes the Physical Downlink Control Channel R-PDCCH on the channel estimation results demodulation back haul link.
In the step 20, configuration can be as follows for the concrete grammar that sends the Resource Unit of common pilot signal on the back haul link in the shared PRB of R-PDCCH:
At first, in the shared PRB of R-PDCCH, search the Resource Unit that the base station utilizes by antenna port transmission common pilot signal in the LTE system, as shown in Figure 3, be the Resource Unit position view that is used for sending common pilot signal that in the LTE system antenna port 0～3 is disposed, wherein, first classifies configuring ports as No. 0, second classifies configuring ports as No. 1, the 3rd classifies configuring ports as No. 2, the 4th classifies configuring ports as No. 3, and being coated with black box is the Resource Unit that the port is used to send common pilot signal, and being coated with the fork square is that the port is not used in the Resource Unit that sends common pilot signal;
Then, the Resource Unit that finds is configured to for the Resource Unit that sends common pilot signal on the back haul link.Concrete, if the physical down link sharing channel (R-PDSCH) on R-PDCCH and the back haul link carries out Time Division Multiplexing, then base station Resource Unit that will find, that be positioned at R-PDCCH zone and R-PDSCH zone is configured to for the Resource Unit that sends common pilot signal on the back haul link, be the base station in R-PDCCH zone and the R-PDSCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for common pilot signal on the transmission back haul link; If R-PDCCH and R-PDSCH carry out frequency division multiplexing (FDM), Resource Unit that the base station will find, that be positioned at the R-PDCCH zone is configured to for the Resource Unit that sends common pilot signal on the back haul link, be the base station in the R-PDCCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link.
When R-PDCCH and R-PDSCH carry out TDM, if the PRB that R-PDSCH and R-PDCCH are shared is also incomplete same, then at first determine the PRB that R-PDSCH and R-PDCCH are taken jointly, and the zone of the R-PDCCH in this PRB and R-PDSCH zone, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link.
The R-PDCCH zone refers to the resource area that R-PDCCH is shared, the resource area that the R-PDSCH zone refers to or R-PDSCH is shared.
At present, the R-PDCCH on the back haul link has time division duplex (TDM) and Frequency Division Duplexing (FDD) (FDM) dual mode, and the FDM mode can be referring to Fig. 4, and the TDM mode can be referring to Fig. 5.Among two figure, PDSCH is the Physical Downlink Shared Channel in the LTE system, and R-PDSCH is the Physical Downlink Shared Channel to the via node equipment sending data of being used on the LTE-A system repeated link.As can be seen from the figure, in order to reduce the influence to present LTE system, R-PDCCH is positioned at the PDSCH intra-zone.
The FDM mode, namely R-PDCCH and R-PDSCH, PDSCH are mutual FDM's in the back haul link.In Fig. 4, R-PDCCH takies a plurality of Physical Resource Block (PRB).
The TDM mode, namely R-PDCCH and R-PDSCH are TDM in the back haul link, and R-PDCCH and R-PDSCH and PDSCH are FDM.For the R-PDCCH demodulation, can be by a plurality of relayings whiles, correct detecting in order to guarantee it, its pilot tone must be public guide frequency.
Need to prove, Fig. 4 and Fig. 5 are a kind of TDM and FDM mode schematic diagram, and each channel also can adopt other TDM, FDM mode, for example, PDSCH zone among Fig. 5 also can be configured to the R-PDSCH zone, namely R-PDSCH can take different PRB with R-PDCCH.
With specific embodiment the Resource Unit configuration mode that is used for common pilot signal on the transmission back haul link is described below:
Embodiment one:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 0 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 4 OFDM symbols, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDSCH area configurations, the concrete configuration process is as follows:
Step S01: determine in the shared PRB of R-PDCCH, the base station sends the Resource Unit position that common pilot signal utilizes by No. 0 port and is in the LTE system: the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, the Resource Unit that No. 0 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of the shared PRB of described PRB, No. 6 frequency domain unit respectively, and the Resource Unit that constitutes with No. 3 frequency domain unit of the shared PRB of described PRB, No. 9 frequency domain unit respectively of No. 4 OFDM symbols of No. 2 time slots;
Step S02: will be positioned at the R-PDCCH zone, the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively is configured to for the Resource Unit that sends common pilot signal on the back haul link; To be positioned at the R-PDSCH zone, the Resource Unit that No. 0 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of the shared PRB of described PRB, No. 6 frequency domain unit respectively, and the Resource Unit that constitutes with No. 3 frequency domain unit of the shared PRB of described PRB, No. 9 frequency domain unit respectively of No. 4 OFDM symbols of No. 2 time slots, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 6 A.
Embodiment two:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 0 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 5 OFDM symbols, in R-PDCCH zone and R-PDSCH zone, configuration is used for sending the Resource Unit of common pilot signal on the back haul link, and the concrete configuration process is as follows:
Step S11: determine that in the shared PRB of R-PDCCH the base station sends the Resource Unit position that common pilot signal utilizes by No. 0 port in the LTE system, determines that the result is with step S01;
Step S12: will be positioned at the R-PDCCH zone, the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, the Resource Unit that No. 0 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of the shared PRB of described PRB, No. 6 frequency domain unit respectively is configured to for the Resource Unit that sends common pilot signal on the back haul link; To be positioned at the R-PDSCH zone, the Resource Unit that No. 4 OFDM symbols of No. 2 time slots constitute with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 6 B.
Embodiment three:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 0 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 1 OFDM symbol, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDSCH area configurations, the concrete configuration process is as follows:
Step S21: determine that in the shared PRB of R-PDCCH the base station sends the Resource Unit position that common pilot signal utilizes by No. 0 port in the LTE system, determines that the result is with step S01;
Step S22: will be positioned at the R-PDSCH zone, the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, the Resource Unit that No. 0 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of the shared PRB of described PRB, No. 6 frequency domain unit respectively, and the Resource Unit that constitutes with No. 3 frequency domain unit of the shared PRB of described PRB, No. 9 frequency domain unit respectively of No. 4 OFDM symbols of No. 2 time slots, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 6 C.
Embodiment four:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 0 port arrangement of base station, R-PDCCH and R-PDSCH adopt the FDM pattern, and for the Resource Unit that sends common pilot signal on the back haul link, the concrete configuration process is as follows in the R-PDCCH area configurations:
Step S31: determine that in the shared PRB of R-PDCCH the base station sends the Resource Unit position that common pilot signal utilizes by No. 0 port in the LTE system, determines that the result is with step S01;
Step S32: will be positioned at the R-PDCCH zone, the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, the Resource Unit that No. 0 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of the shared PRB of described PRB, No. 6 frequency domain unit respectively, and the Resource Unit that constitutes with No. 3 frequency domain unit of the shared PRB of described PRB, No. 9 frequency domain unit respectively of No. 4 OFDM symbols of No. 2 time slots, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 6 D.
Embodiment five:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 1 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 4 OFDM symbols, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDSCH area configurations, the concrete configuration process is as follows:
Step T01: determine among the shared PRB of R-PDCCH, the base station sends the Resource Unit position that common pilot signal utilizes by No. 1 port and is in the LTE system: the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively, the Resource Unit that the Resource Unit that No. 2 time slots No. 0 OFDM symbol constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively among the described PRB, No. 4 OFDM symbols of described No. 2 time slots constitute with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively;
Step T02: will be positioned at the R-PDCCH zone, the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively is configured to for the Resource Unit that sends common pilot signal on the back haul link; To be positioned at the R-PDSCH zone, the Resource Unit that No. 0 OFDM symbol of No. 2 time slots constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, and the Resource Unit that constitutes with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively of No. 4 OFDM symbols of No. 2 time slots, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 7 A.
Embodiment six:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 1 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 5 OFDM symbols, in R-PDCCH zone and R-PDSCH zone, configuration is used for sending the Resource Unit of common pilot signal on the back haul link, and the concrete configuration process is as follows:
Step T11: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 1 port in the LTE system, determines that the result is with step T01;
Step T12: will be positioned at the R-PDCCH zone, the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively, and the Resource Unit that constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively of No. 0 OFDM symbol of No. 2 time slots, be configured to for the Resource Unit that sends common pilot signal on the back haul link; To be positioned at the R-PDSCH zone, the Resource Unit that No. 4 OFDM symbols of No. 2 time slots constitute with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 7 B.
Embodiment seven:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 1 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 1 OFDM symbol, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDSCH area configurations, the concrete configuration process is as follows:
Step T21: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 1 port in the LTE system, determines that the result is with step T01;
Step T22: will be positioned at the R-PDSCH zone, the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively, the Resource Unit that No. 0 OFDM symbol of No. 2 time slots constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, and the Resource Unit that constitutes with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively of No. 4 OFDM symbols of No. 2 time slots, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 7 C.
Embodiment eight:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 1 port arrangement of base station, R-PDCCH and R-PDSCH adopt the FDM pattern, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDSCH area configurations, the concrete configuration process is as follows:
Step T31: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 1 port in the LTE system, determines that the result is with step T01;
Step T32: will be positioned at the R-PDCCH zone, the Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively, the Resource Unit that No. 0 OFDM symbol of No. 2 time slots constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, and the Resource Unit that constitutes with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively of No. 4 OFDM symbols of No. 2 time slots, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 7 D.
Embodiment nine:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 2 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 4 OFDM symbols, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDSCH area configurations, the concrete configuration process is as follows:
Step U01: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 2 ports and is in the LTE system: the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively;
Step U02: will be positioned at the R-PDSCH zone, the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 8 A.
Embodiment ten:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 2 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 5 OFDM symbols, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDSCH area configurations, the concrete configuration process is as follows:
Step U11: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 2 ports in the LTE system, determines that the result is with step U01;
Step U12: will be positioned at the R-PDSCH zone, the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 8 B.
Embodiment 11:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 2 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 1 OFDM symbol, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDSCH zone and R-PDSCH area configurations, the concrete configuration process is as follows:
Step U21: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 2 ports in the LTE system, determines that the result is with step U01;
Step U22: will be positioned at the R-PDSCH zone, the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 8 C.
Embodiment 12:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 2 port arrangement of base station, R-PDCCH and R-PDSCH adopt the FDM pattern, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDCCH area configurations, the concrete configuration process is as follows:
Step U31: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 2 ports in the LTE system, determines that the result is with step U01;
Step U32: will be positioned at the R-PDCCH zone, the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 8 D.
Embodiment 13:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 3 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 4 OFDM symbols, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDCCH area configurations, the concrete configuration process is as follows:
Step V01: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 3 ports and is in the LTE system: the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively;
Step V02: will be positioned at the R-PDSCH zone, the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 9 A.
Embodiment 14:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 3 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 5 OFDM symbols, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDCCH area configurations, the concrete configuration process is as follows:
Step V11: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 3 ports in the LTE system, determines that the result is with step V01;
Step V12: will be positioned at the R-PDSCH zone, the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 9 B.
Embodiment 15:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 3 port arrangement of base station, R-PDCCH and R-PDSCH adopt the TDM pattern, the R-PDCCH zone takies 1 OFDM symbol, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDSCH area configurations, the concrete configuration process is as follows:
Step V21: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 3 ports in the LTE system, determines that the result is with step V01;
Step V22: will be positioned at the R-PDSCH zone, the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 9 C.
Embodiment 16:
In the present embodiment, the Resource Unit that is used for the transmission common pilot signal at No. 3 port arrangement of base station, R-PDCCH and R-PDSCH adopt the FDM pattern, be used for the Resource Unit of common pilot signal on the transmission back haul link in R-PDCCH zone and R-PDCCH area configurations, the concrete configuration process is as follows:
Step V31: determine among the shared PRB of R-PDCCH that the base station sends the Resource Unit position that common pilot signal utilizes by No. 3 ports in the LTE system, determines that the result is with step V01;
Step V32: will be positioned at the R-PDCCH zone, the Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively, be configured to for the Resource Unit that sends common pilot signal on the back haul link, as the black box that is coated with among Fig. 9 D.
Adopt the manner, owing to be not used for sending the Resource Unit of common pilot signal on the back haul link according to the configuration of the rule in the LTE system, which Resource Unit RN can't be informed on receives common pilot signal, therefore, before RN receives common pilot signal, the base station need send to RN with the Resource Unit positional information that is used for common pilot signal on the transmission back haul link of configuration, then RN determines corresponding Resource Unit according to this Resource Unit positional information, and receives the common pilot signal that send the base station at this Resource Unit.
Among the present invention, the R-PDCCH zone can also only take a time frequency unit.
Among the present invention, the base station sends common pilot signal with the transmitted power of setting to the RN under this base station, and the transmitted power of this setting is equal to or greater than the base station sends common pilot signal to terminal in the PDCCH zone transmitted power.The transmitted power of setting can send the high PdB of transmitted power of common pilot signal than the base station to terminal in the PDCCH zone, wherein P be in the system under the situation of the data demodulates that does not influence other frequency bands, the power offset that the R-PDCCH public guide frequency is added.The base station uses the pilot frequency sequence of setting to send common pilot signal to the RN under the described base station, and the pilot frequency sequence of setting and base station send the employed pilot frequency sequence of common pilot signal to terminal in the PDCCH zone identical or different.
Among the present invention, the whole common pilot signals in the RN receiving system frequency band comprise the common pilot signal on PDCCH zone and the R-PDCCH zone, utilize all common pilot signals that receive to carry out channel estimating jointly.
Referring to Figure 10, the embodiment of the invention also provides a kind of long-term evolution upgrading LTE-A communication system, and this system comprises:
Base station 1001, be used in the shared Physical Resource Block PRB of Physical Downlink Control Channel R-PDCCH on back haul link, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link, utilize this Resource Unit to send common pilot signal to the via node equipment under this base station;
Via node equipment 1002 is used for receiving described common pilot signal at described Resource Unit, carries out channel estimating according to this common pilot signal, and utilizes the Physical Downlink Control Channel R-PDCCH on the channel estimation results demodulation back haul link.
Described base station 1001 is used for:
When the physical down link sharing channel R-PDSCH on described R-PDCCH and back haul link carries out time division multiplexing tdm, in R-PDCCH zone and the R-PDSCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link;
When described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, in the R-PDCCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link.
Described base station 1001 also is used for:
The Resource Unit positional information that is used for common pilot signal on the transmission back haul link of configuration is sent to described RN;
Accordingly, described via node equipment 1002 is used for:
Determine the Resource Unit of described Resource Unit positional information correspondence, and receive described common pilot signal at this Resource Unit.
Described R-PDCCH and described R-PDSCH adopt Frequency Division Duplexing (FDD) or TDD mode; Perhaps, described R-PDCCH zone takies a time frequency unit.
Described base station 1001 is used for:
Send common pilot signal with the transmitted power of setting to the via node equipment under the described base station, the transmitted power of described setting is equal to or greater than described base station sends common pilot signal to terminal in the PDCCH zone transmitted power; Use the pilot frequency sequence of setting to send common pilot signal to the via node equipment under the described base station, the pilot frequency sequence of described setting and described base station send the employed pilot frequency sequence of common pilot signal to terminal in the PDCCH zone identical or different.
Described via node equipment 1002 also is used for:
Receive the common pilot signal on the PDCCH; Utilize the common pilot signal on the described PDCCH and carry out channel estimating at the common pilot signal that described Resource Unit receives.
Referring to Figure 11, the embodiment of the invention also provides a kind of base station, and this base station comprises:
Resource is chosen unit 1101, is used in the shared Physical Resource Block PRB of Physical Downlink Control Channel R-PDCCH on back haul link, chooses the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link;
Pilot tone transmitting element 1102 is used for utilizing described Resource Unit to send common pilot signal to the via node equipment under this base station.
Described resource is chosen unit 1101 and is used for:
When the physical down link sharing channel R-PDSCH on described R-PDCCH and back haul link carries out time division multiplexing tdm, in R-PDCCH zone and the R-PDSCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link;
When described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, in the R-PDCCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link.
This base station also comprises:
Configuration information transmitting element 1103, the Resource Unit positional information that is used for common pilot signal on the transmission back haul link that is used for disposing sends to described RN.
Described pilot tone transmitting element 1102 is used for:
Send common pilot signal with the transmitted power of setting to the via node equipment under this base station, the transmitted power of described setting is equal to or greater than described base station sends common pilot signal to terminal in the PDCCH zone transmitted power; Use the pilot frequency sequence of setting to send common pilot signal to the via node equipment under the described base station, the pilot frequency sequence of described setting and described base station send the employed pilot frequency sequence of common pilot signal to terminal in the PDCCH zone identical or different.
Referring to Figure 12, the embodiment of the invention also provides a kind of via node equipment, and this via node equipment comprises:
The first pilot reception unit 1201, be used for receiving the common pilot signal that the base station sends at the pre-configured Resource Unit that is used for common pilot signal on the transmission back haul link, described Resource Unit is positioned at the shared Physical Resource Block PRB of Physical Downlink Control Channel R-PDCCH on the back haul link;
Channel data demodulating unit 1202 is used for carrying out channel estimating according to described common pilot signal, and utilizes the Physical Downlink Control Channel R-PDCCH on the channel estimation results demodulation back haul link.
This via node equipment also comprises:
The second pilot reception unit 1203 is used for receiving the common pilot signal on the PDCCH;
Described channel data demodulating unit 1202 is used for:
Utilize the common pilot signal on the described PDCCH and carry out channel estimating at the common pilot signal that described Resource Unit receives.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the invention provides, the base station is in the shared PRB of R-PDCCH, choose for the Resource Unit that sends common pilot signal on the back haul link, utilize this Resource Unit to send common pilot signal to the via node equipment under this base station, RN receives common pilot signal at this Resource Unit, and carry out channel estimating according to the common pilot signal that receives, and then utilize data on the channel estimation results demodulation R-PDCCH, thereby guaranteed the correctly data on the demodulation R-PDCCH of via node equipment under the base station, reached the purpose of correct reception R-PDCCH.
Simultaneously, send the Resource Unit position that common pilot signal utilizes according to base station in the LTE system by antenna port in the embodiment of the invention, dispose for the Resource Unit that sends common pilot signal on the back haul link, can be on the basis that does not influence existing LTE system specifications, guarantee the performance of its backhaul link of via node Equipment Inspection, simultaneously can also its pilot-frequency expense of better controlled.
And, be in the shared PRB of R-PDCCH among the present invention, choose for the Resource Unit that sends common pilot signal on the back haul link, and utilize this Resource Unit to send common pilot signal to RN, in other PRB, do not send common pilot signal, can in the demodulation performance that guarantees the R-PDCCH of RN, save system resource.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (16)

1. the sending method of public guide frequency on the long-term evolution upgrading LTE-A system back haul link is characterized in that this method comprises:
If the Physical Downlink Control Channel R-PDCCH on the back haul link and the physical down link sharing channel R-PDSCH on the back haul link carry out time division multiplexing tdm, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH in the base station; If described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in the R-PDCCH zone of the shared PRB of R-PDCCH in the base station;
The base station utilizes the Resource Unit of choosing to send common pilot signal to the via node equipment RN under the described base station.
2. the method for claim 1 is characterized in that, if described antenna port is No. 0 port, described Resource Unit comprises:
The Resource Unit that No. 4 orthogonal frequency division multiplex OFDM symbols of No. 1 time slot constitute with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively among the shared PRB of described R-PDCCH;
The Resource Unit that No. 2 time slots No. 0 OFDM symbol constitutes with No. 0 frequency domain unit of the shared PRB of described PRB, No. 6 frequency domain unit respectively among the described PRB;
The Resource Unit that No. 4 OFDM symbols of described No. 2 time slots constitute with No. 3 frequency domain unit of the shared PRB of described PRB, No. 9 frequency domain unit respectively.
3. the method for claim 1 is characterized in that, if described antenna port is No. 1 port, described Resource Unit comprises:
The Resource Unit that No. 4 OFDM symbols of No. 1 time slot constitute with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively among the shared PRB of described R-PDCCH;
The Resource Unit that No. 2 time slots No. 0 OFDM symbol constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively among the described PRB;
The Resource Unit that No. 4 OFDM symbols of described No. 2 time slots constitute with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively.
4. the method for claim 1 is characterized in that, if described antenna port is No. 2 ports, described Resource Unit comprises:
The Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 3 frequency domain unit of described PRB, No. 9 frequency domain unit respectively among the shared PRB of described R-PDCCH.
5. the method for claim 1 is characterized in that, if described antenna port is No. 3 ports, described Resource Unit comprises:
The Resource Unit that No. 1 OFDM symbol of No. 2 time slots constitutes with No. 0 frequency domain unit of described PRB, No. 6 frequency domain unit respectively among the shared PRB of described R-PDCCH.
6. the method for claim 1, it is characterized in that, described base station sends common pilot signal with the transmitted power of setting to the RN under the described base station, and the transmitted power of described setting is equal to or greater than described base station sends common pilot signal to terminal in the physical downlink control channel PDCCH zone transmitted power.
7. the method for claim 1, it is characterized in that, described base station uses the pilot frequency sequence of setting to send common pilot signal to the RN under the described base station, and the pilot frequency sequence of described setting and described base station send the employed pilot frequency sequence of common pilot signal to terminal in the PDCCH zone identical or different.
8. the channel demodulation method on the long-term evolution upgrading LTE-A system back haul link is characterized in that this method comprises:
Via node equipment RN receives the common pilot signal that the base station sends at the pre-configured Resource Unit that is used for common pilot signal on the transmission back haul link; Described Resource Unit is that the base station is chosen as follows: if the Physical Downlink Control Channel R-PDCCH on the back haul link and the physical down link sharing channel R-PDSCH on the back haul link carry out time division multiplexing tdm, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH in the base station; If described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in the R-PDCCH zone of the shared PRB of R-PDCCH in the base station;
Described RN carries out channel estimating according to described common pilot signal, and utilizes the described R-PDCCH of channel estimation results demodulation.
9. method as claimed in claim 8 is characterized in that, before carrying out channel estimating according to described common pilot signal, described RN receives the common pilot signal on the physical downlink control channel PDCCH;
Describedly carry out channel estimating according to described common pilot signal and comprise:
Described RN utilizes the common pilot signal on the described PDCCH and carries out channel estimating at the common pilot signal that described Resource Unit receives.
10. long-term evolution upgrading LTE-A communication system is characterized in that this system comprises:
The base station, when being used for Physical Downlink Control Channel R-PDCCH on back haul link and the physical down link sharing channel R-PDSCH on the back haul link and carrying out time division multiplexing tdm, in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link; When described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, in the R-PDCCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link; The Resource Unit that utilization is chosen sends common pilot signal to the via node equipment under this base station;
Via node equipment is used for receiving described common pilot signal at described Resource Unit, carries out channel estimating according to this common pilot signal, and utilizes the Physical Downlink Control Channel R-PDCCH on the channel estimation results demodulation back haul link.
11. system as claimed in claim 10 is characterized in that, described via node equipment also is used for:
Receive the common pilot signal on the physical downlink control channel PDCCH;
Utilize the common pilot signal on the PDCCH and carry out channel estimating at the common pilot signal that described Resource Unit receives.
12. a base station is characterized in that, this base station comprises:
Resource is chosen the unit, when being used for Physical Downlink Control Channel R-PDCCH on back haul link and the physical down link sharing channel R-PDSCH on the back haul link and carrying out time division multiplexing tdm, in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link; When described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, in the R-PDCCH zone of the shared PRB of R-PDCCH, choose the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link;
The pilot tone transmitting element, the Resource Unit that is used for utilizing described resource to choose unit selection sends common pilot signal to the via node equipment under this base station.
13. base station as claimed in claim 12 is characterized in that, described pilot tone transmitting element is used for:
Send common pilot signal with the transmitted power of setting to the via node equipment under this base station, the transmitted power of described setting is equal to or greater than described base station sends common pilot signal to terminal in the physical downlink control channel PDCCH zone transmitted power.
14. base station as claimed in claim 12 is characterized in that, described pilot tone transmitting element is used for:
Use the pilot frequency sequence of setting to send common pilot signal to the via node equipment under the described base station, the pilot frequency sequence of described setting and described base station send the employed pilot frequency sequence of common pilot signal to terminal in the PDCCH zone identical or different.
15. a via node equipment is characterized in that, this via node equipment comprises:
The first pilot reception unit is used for receiving the common pilot signal that the base station sends at the pre-configured Resource Unit that is used for common pilot signal on the transmission back haul link; Described Resource Unit is that the base station is chosen as follows: if the Physical Downlink Control Channel R-PDCCH on the back haul link and the physical down link sharing channel R-PDSCH on the back haul link carry out time division multiplexing tdm, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in R-PDCCH zone and the R-PDSCH zone of the shared Physical Resource Block PRB of R-PDCCH in the base station; If described R-PDCCH and R-PDSCH carry out frequency division multiplexing FDM, then the pre-configured Resource Unit that is used for sending common pilot signal on the back haul link is chosen in the R-PDCCH zone of the shared PRB of R-PDCCH in the base station;
The channel data demodulating unit is used for carrying out channel estimating according to described common pilot signal, and utilizes the Physical Downlink Control Channel R-PDCCH on the channel estimation results demodulation back haul link.
16. via node equipment as claimed in claim 15 is characterized in that, this via node equipment also comprises:
The second pilot reception unit is used for receiving the common pilot signal on the physical downlink control channel PDCCH;
Described channel data demodulating unit is used for:
Utilize the common pilot signal on the described PDCCH and carry out channel estimating at the common pilot signal that described Resource Unit receives.
CN 200910237050 2009-11-02 2009-11-02 Method, system and equipment for sending common pilot frequency and demodulating channel on return link Active CN102056302B (en)

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