CN104066147A - Network node searching method, device and equipment based on downlink detection reference signal - Google Patents

Network node searching method, device and equipment based on downlink detection reference signal Download PDF

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CN104066147A
CN104066147A CN201310088288.8A CN201310088288A CN104066147A CN 104066147 A CN104066147 A CN 104066147A CN 201310088288 A CN201310088288 A CN 201310088288A CN 104066147 A CN104066147 A CN 104066147A
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reference signal
detection reference
descending detection
cyclic
sequence
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张晓博
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ZTE Corp
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ZTE Corp
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Abstract

The invention discloses a network node searching method based on a downlink detection reference signal. A UE receives the downlink detection reference signal which is sent by network side equipment and composed of a ZC sequence and a cyclic prefix or a cyclic suffix; and a network node is searched according to the downlink detection reference signal. The invention also discloses a network node searching device and equipment based on the downlink detection reference signal. The network nodes of all nearby communities can be searched in one step by the UE via the scheme, and the downlink detection reference signal is simple in construction so that demodulation complexity can be greatly reduced.

Description

Based on method, device and the equipment of descending detection reference signal search network node
Technical field
The present invention relates to the Cell searching technology in wireless communication system, relate in particular to a kind of method, device and equipment based on descending detection reference signal search network node.
Background technology
Cell searching in existing 3GPP LTE/LTE-A system is the main synchronizing sequence (PSS by descending synchronous signal channel, Primary Synchronized Sequence)/secondary synchronization sequences (SSS, SecondarySynchronized Sequence) complete, the demodulation step of subscriber equipment (UE) comprising:
Step 101: obtain other synchronous and community physical packets ID of sub-frame level by the incoherent detection of PSS;
Step 102: the synchronous and community ID that obtains frame rank by the be concerned with/incoherent detection of SSS;
Here, the channel response that described relevant detection need to utilize PSS to estimate like this, can obtain additional gain in frequency-selective channel.
Step 103:CRS measurement, PBCH demodulation, system information read etc.
For any one community, PSS is 1 that from 3 ZC sequences, selects, and SSS selects from 168 pseudo random sequences, and the two has formed the physical I D of community jointly.
In small-cell (Small cell) scene of discussing at Release 12, number of cells significantly increases, signal overlap between community, thereby the problem of bringing cell synchronous signal to disturb, for example: the PSS collision possibility of contiguous synchronized cells increases, PSS channel estimating not brigadier cause the relevant hydraulic performance decline that detects of SSS.
In addition, traditional PSS/SSS designs for the transmitting power of macrocell, and the transmitting power of small-cell is much smaller than the transmitting power of macrocell, and the reliability that therefore PSS/SSS detects needs further to improve.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method, device and equipment based on descending detection reference signal search network node, reduce the complexity of descending detection reference signal demodulation, can be in once searching for, near the network node of the whole small-cells searching out.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method based on descending detection reference signal search network node provided by the invention, the method comprises:
User equipment (UE) receives the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix that network equipment sends; According to described descending detection reference signal search network node.
In such scheme, the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix that described UE receives that network equipment sends is: the downstream signal that UE issues from network equipment by the mode of blind Detecting, detect the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix.
In such scheme, the method also comprises: UE receives the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix from network equipment, detect described descending detection reference signal according to described parameter from network equipment the downstream signal issuing.
In such scheme, described UE receives the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix from network equipment, for: the parameter of obtaining the descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix the high-level signaling that UE issues from network equipment or physical layer signaling.
In such scheme, the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix at least comprises following one: position, Cyclic Prefix or cyclic suffix length in subframe of descending detection reference signal duration, descending detection reference signal, the cyclic shift length of descending detection reference signal, the ZC sequence length of descending detection reference signal, the bandwidth of descending detection reference signal, ZC sequential sampling length N zC, descending detection reference signal transmitting power.
In such scheme, the described descending detection reference signal duration is X orthogonal frequency division multiplex OFDM symbol of Long Term Evolution LTE system, and X belongs to the integer in 2～14.
In such scheme, the position of described descending detection reference signal in subframe is to align at the afterbody of descending sub frame and with descending sub frame afterbody.
In such scheme, described Cyclic Prefix or cyclic suffix length at least comprise the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us.
In such scheme, the cyclic shift length of described descending detection reference signal at least comprises the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us.
In such scheme, the ZC sequence length of described descending detection reference signal is the positive integer times of OFDM symbol period.
In such scheme, the bandwidth of described descending detection reference signal is 6f Physical Resource Block PRB, and f is positive integer.
In such scheme, described ZC sequential sampling length N zCvalue at least comprises in numerical value below: 977,983,907,911,769,773,701.
In such scheme, the transmitting power of described descending detection reference signal repeats to send the factor by configuration and determines.
A kind of device based on descending detection reference signal search network node provided by the invention, this device comprises: signal receiving module, search module; Wherein,
Described signal receiving module, the descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix sending for receiving network equipment, and described descending detection reference signal is sent to described search module;
Described search module, for according to described descending detection reference signal search network node.
In such scheme, described signal receiving module, specifically for detecting the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix the downstream signal issuing from network equipment by the mode of blind Detecting.
In such scheme, described signal receiving module, also, for receive the parameter of the described descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix from network equipment, the downstream signal issuing from network equipment according to described parameter, detect described descending detection reference signal.
In such scheme, described signal receiving module, also specifically for obtaining the parameter of the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix the high-level signaling that issues from network equipment or physical layer signaling.
In such scheme, the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix at least comprises following one: position, Cyclic Prefix or cyclic suffix length in subframe of descending detection reference signal duration, descending detection reference signal, the cyclic shift length of descending detection reference signal, the ZC sequence length of descending detection reference signal, the bandwidth of descending detection reference signal, ZC sequential sampling length N zC, descending detection reference signal transmitting power.
A kind of user equipment (UE) provided by the invention, this UE comprises the above-mentioned device based on descending detection reference signal search network node.
A kind of network equipment provided by the invention, this network equipment, for issuing the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix to UE.
The invention provides a kind of method, device and equipment based on descending detection reference signal search network node, UE receives the descending detection reference signal by ZC (Zadoff-Chu) sequence and Cyclic Prefix or cyclic suffix formation from network equipment; According to described descending detection reference signal search network node; So, by the descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix, UE can disposablely search out near the network node of whole small-cells, and described descending detection reference signal simple structure, can greatly reduce the complexity of demodulation.
Brief description of the drawings
Fig. 1 is the schematic diagram of the method flow based on descending detection reference signal search network node provided by the invention;
Fig. 2 is the position view of descending detection reference signal provided by the invention in subframe;
Fig. 3 is the schematic diagram in continuous two subframes with descending detection reference signal provided by the invention;
Fig. 4 is the structural representation of the device based on descending detection reference signal search network node provided by the invention.
Embodiment
Basic thought of the present invention is: UE receives the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix that network equipment sends; According to described descending detection reference signal search network node.
Below by drawings and the specific embodiments, the present invention is described in further detail.
The present invention realizes a kind of method based on descending detection reference signal search network node, and as shown in Figure 1, the method comprises following step:
Step 201:UE receives the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix that network equipment sends;
Concrete, the downstream signal that UE issues from network equipment by the mode of blind Detecting, detect the descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix;
This step also comprises: UE receives the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix from network equipment, detect described descending detection reference signal according to described parameter from network equipment the downstream signal issuing;
Described UE receives the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix from network equipment, obtain the parameter of the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix the high-level signaling that Ke Yiwei: UE issues from network equipment or physical layer signaling;
Described high-level signaling or physical layer signaling are to be issued by the Serving cell of UE, it is the auxiliary community detection process in Serving cell, wherein, described high-level signaling can be Radio Resource control (RRC, RadioResource Control) signaling or the middle control (MAC that gets involved, Medium Access Control) signaling, described physical layer signaling can or redefine new DCI signaling at the new bit of the upper interpolation of existing dynamic control instruction (DCI, Dynamical ControlIndicator);
The parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix at least comprises following one: position, Cyclic Prefix or cyclic suffix (CP, Cyclic Prefix/Cyclic Postfix) length in subframe of descending detection reference signal duration, descending detection reference signal, the cyclic shift length of descending detection reference signal, the ZC sequence length of descending detection reference signal, the bandwidth of descending detection reference signal, ZC sequential sampling length N zC, descending detection reference signal transmitting power;
X the OFDM symbol that the described descending detection reference signal duration is LTE system, X belongs to the integer in 2～14; Generally, the described descending detection reference signal duration is less than or equal to 1ms;
The position of described descending detection reference signal in subframe is to align at the afterbody of descending sub frame and with descending sub frame afterbody; Fig. 2 example descending detection reference signal position in subframe, can find out, in the descending sub frame of a 1ms, front end is PDCCH or Muting, rear end is PDSCH, and descending detection reference signal aligns at the afterbody of PDSCH and with descending sub frame afterbody;
Described Cyclic Prefix or cyclic suffix length at least comprise the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us; Here, the minimum length of described Cyclic Prefix or cyclic suffix is (k/0.3+m) us, and wherein, K (kilometer) is the maximum downstream investigative range of supporting, m (us) is maximum multipath time delay, and representative value is 5.2us;
The cyclic shift length of described descending detection reference signal at least comprises the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us; Here, the maximum length of described cyclic shift length is | (K/0.3-m) .N/T seq+ n g|, wherein the minimum positive integer that represents to be not less than x, N is the hits of descending detection reference signal, T seq(us) be the duration of descending detection reference signal, n gthat received pulse molding filtration protection sampling number-representative value is 2;
The ZC sequence length of described descending detection reference signal is generally the positive integer times of OFDM symbol period; Here ZC sequence length can be set, and be about 933.3us or 866.6us or 800us or 733.3us or 666.7us etc.;
Further, the combination of described ZC sequence length and described Cyclic Prefix or cyclic suffix length at least comprises following one: [28672T s, 2048T s], [26624T s, 1884T s], [22528T s, 1884T s], [20480T s, 1884T s], T s=1/30.72us;
The bandwidth of described descending detection reference signal is generally 6f PRB, and f is positive integer; Here, adopt the integral multiple of 6PRB to have two benefits, one is the FFT module of reusing 6PRB, and another is can adopt taking 6PRB as unit to repeat to send at frequency domain the complexity receiving to reduce UE;
Described ZC sequential sampling length N zCvalue at least comprises in numerical value below: 977,983,907,911,769,773,701;
ZC sequence length, CP length and the corresponding N of described descending detection reference signal zCvalue combination at least comprises one or more in 4 combinations below: [28672T s, 2048T s, 977/983], [26624T s, 1884T s, 907/911], [22528T s, 1884T s, 769/773], [20480T s, 1884T s, 701];
The transmitting power of described descending detection reference signal generally repeats to send the factor by configuration to be determined, as: repeating to send factor value is 2 o'clock, as shown in Figure 3, indicates in continuous two subframes and has descending detection reference signal.
Step 202:UE is according to described descending detection reference signal search network node;
Here, introduce as an example a kind of typical search procedure, UE does decorrelation operation by the descending detection reference signal receiving and local root ZC sequence at frequency domain, the output sequence of decorrelation is done to anti-fast fourier transform (IFFT) operation, IFFT Output rusults is divided into multiple detection windows according to the length of cyclic shift, if the energy of certain detection window inside exceedes setting threshold, think that the interior corresponding community of this detection window has sent descending detection reference signal.
In order to realize said method, the present invention also provides a kind of device based on descending detection reference signal search network node, and as shown in Figure 4, this device comprises: signal receiving module 11, search module 12; Wherein,
Described signal receiving module 11, the descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix sending for receiving network equipment, and described descending detection reference signal is sent to described search module 12;
Described search module 12, for according to described descending detection reference signal search network node;
Described signal receiving module 11, specifically for detecting the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix the downstream signal issuing from network equipment by the mode of blind Detecting;
Described signal receiving module 11, also, for receive the parameter of the described descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix from network equipment, the downstream signal issuing from network equipment according to described parameter, detect described descending detection reference signal;
Described signal receiving module 11, also specifically for obtaining the parameter of the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix the high-level signaling that issues from network equipment or physical layer signaling;
The parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix at least comprises following one: position, Cyclic Prefix or cyclic suffix length in subframe of descending detection reference signal duration, descending detection reference signal, the cyclic shift length of descending detection reference signal, the ZC sequence length of descending detection reference signal, the bandwidth of descending detection reference signal, ZC sequential sampling length N zC, descending detection reference signal transmitting power;
X the OFDM symbol that the described descending detection reference signal duration is LTE system, X belongs to the integer in 2～14; Generally, the described descending detection reference signal duration is less than or equal to 1ms;
The position of described descending detection reference signal in subframe is to align at the afterbody of descending sub frame and with descending sub frame afterbody;
Described Cyclic Prefix or cyclic suffix length at least comprise the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us;
The cyclic shift length of described descending detection reference signal at least comprises the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us;
The ZC sequence length of described descending detection reference signal is generally the positive integer times of OFDM symbol period;
Further, the combination of described ZC sequence length and described Cyclic Prefix or cyclic suffix length at least comprises following one: [28672T s, 2048T s], [26624T s, 1884T s], [22528T s, 1884T s], [20480T s, 1884T s], T s=1/30.72us;
The bandwidth of described descending detection reference signal is generally 6f PRB, and f is positive integer;
Described ZC sequential sampling length N zCvalue at least comprises one or more in numerical value below: 977,983,907,911,769,773,701;
ZC sequence length, CP length and the corresponding N of described descending detection reference signal zCvalue combination at least comprises one or more in 4 combinations below: [28672T s, 2048T s, 977/983], [26624T s, 1884T s, 907/911], [22528T s, 1884T s, 769/773], [20480T s, 1884T s, 701];
The transmitting power of described descending detection reference signal generally repeats to send the factor by configuration and determines.
Based on said apparatus, the present invention also provides a kind of UE, and this UE comprises said apparatus as shown in Figure 4.
Based on above-mentioned UE, the present invention also provides a kind of network equipment, and for issue the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix to UE, the generation formula of described ZC sequence is: x u ( n ) = exp ( - j πun ( n + 1 ) N ZC ) , 0 ≤ n ≤ N ZC - 1 , Wherein N zCfor sequential sampling length, the constructive method of Cyclic Prefix/suffix is to add N at ZC tail of sequence cpindividual sampling, and x u(n)=x u(n-N zC), N zC≤ n≤N zC+ N cp-1;
Described network equipment, also for issuing the parameter of the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix; Concrete, described network equipment carries the parameter of the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix by high-level signaling or physical layer signaling;
The parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix at least comprises following one: position, Cyclic Prefix or cyclic suffix length in subframe of descending detection reference signal duration, descending detection reference signal, the cyclic shift length of descending detection reference signal, the ZC sequence length of descending detection reference signal, the bandwidth of descending detection reference signal, ZC sequential sampling length N zC, descending detection reference signal transmitting power;
X the OFDM symbol that the described descending detection reference signal duration is LTE system, X belongs to the integer in 2～14; Generally, the described descending detection reference signal duration is less than or equal to lms;
The position of described descending detection reference signal in subframe is to align at the afterbody of descending sub frame and with descending sub frame afterbody;
Described Cyclic Prefix or cyclic suffix length at least comprise the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us;
The cyclic shift length of described descending detection reference signal at least comprises the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us;
The ZC sequence length of described descending detection reference signal is generally the positive integer times of OFDM symbol period;
Further, the combination of described ZC sequence length and described Cyclic Prefix or cyclic suffix length at least comprises following one: [28672T s, 2048T s], [26624T s, 1884T s], [22528T s, 1884T s], [20480T s, 1884T s], T s=1/30.72us;
The bandwidth of described descending detection reference signal is generally 6f PRB, and f is positive integer;
Described ZC sequential sampling length N zCvalue at least comprises one or more in numerical value below: 977,983,907,911,769,773,701;
ZC sequence length, CP length and the corresponding N of described descending detection reference signal zCvalue combination at least comprises one or more in 4 combinations below: [28672T s, 2048T s, 977/983], [26624T s, 1884T s, 907/911], [22528T s, 1884T s, 769/773], [20480T s, 1884T s, 701];
The transmitting power of described descending detection reference signal generally repeats to send the factor by configuration and determines.
In sum, by the descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix, UE can disposablely search out near the network node of whole small-cells, and described descending detection reference signal simple structure, can greatly reduce the complexity of demodulation.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.

Claims (20)

1. the method based on descending detection reference signal search network node, is characterized in that, the method comprises:
User equipment (UE) receives the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix that network equipment sends; According to described descending detection reference signal search network node.
2. method according to claim 1, it is characterized in that, the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix that described UE receives that network equipment sends is: the downstream signal that UE issues from network equipment by the mode of blind Detecting, detect the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix.
3. method according to claim 1, it is characterized in that, the method also comprises: UE receives the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix from network equipment, detect described descending detection reference signal according to described parameter from network equipment the downstream signal issuing.
4. method according to claim 3, it is characterized in that, described UE receives the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix from network equipment, for: the parameter of obtaining the descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix the high-level signaling that UE issues from network equipment or physical layer signaling.
5. method according to claim 4, it is characterized in that, the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix at least comprises following one: position, Cyclic Prefix or cyclic suffix length in subframe of descending detection reference signal duration, descending detection reference signal, the cyclic shift length of descending detection reference signal, the ZC sequence length of descending detection reference signal, the bandwidth of descending detection reference signal, ZC sequential sampling length N zC, descending detection reference signal transmitting power.
6. method according to claim 5, is characterized in that, the described descending detection reference signal duration is X orthogonal frequency division multiplex OFDM symbol of Long Term Evolution LTE system, and X belongs to the integer in 2～14.
7. method according to claim 5, is characterized in that, the position of described descending detection reference signal in subframe is to align at the afterbody of descending sub frame and with descending sub frame afterbody.
8. method according to claim 5, is characterized in that, described Cyclic Prefix or cyclic suffix length at least comprise the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us.
9. method according to claim 5, is characterized in that, the cyclic shift length of described descending detection reference signal at least comprises the one in following numerical value: 2048T s, 1884T s, T s=1/30.72us.
10. method according to claim 5, is characterized in that, the ZC sequence length of described descending detection reference signal is the positive integer times of OFDM symbol period.
11. methods according to claim 5, is characterized in that, the bandwidth of described descending detection reference signal is 6f Physical Resource Block PRB, and f is positive integer.
12. methods according to claim 5, is characterized in that, described ZC sequential sampling length N zCvalue at least comprises in numerical value below: 977,983,907,911,769,773,701.
13. methods according to claim 5, is characterized in that, the transmitting power of described descending detection reference signal repeats to send the factor by configuration and determines.
14. 1 kinds of devices based on descending detection reference signal search network node, is characterized in that, this device comprises: signal receiving module, search module; Wherein,
Described signal receiving module, the descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix sending for receiving network equipment, and described descending detection reference signal is sent to described search module;
Described search module, for according to described descending detection reference signal search network node.
15. devices according to claim 14, it is characterized in that, described signal receiving module, specifically for detecting the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix the downstream signal issuing from network equipment by the mode of blind Detecting.
16. devices according to claim 14, it is characterized in that, described signal receiving module, also, for receive the parameter of the described descending detection reference signal being formed by ZC sequence and Cyclic Prefix or cyclic suffix from network equipment, the downstream signal issuing from network equipment according to described parameter, detect described descending detection reference signal.
17. devices according to claim 16, it is characterized in that, described signal receiving module, also specifically for obtaining the parameter of the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix the high-level signaling that issues from network equipment or physical layer signaling.
18. devices according to claim 17, it is characterized in that, the parameter of the described descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix at least comprises following one: position, Cyclic Prefix or cyclic suffix length in subframe of descending detection reference signal duration, descending detection reference signal, the cyclic shift length of descending detection reference signal, the ZC sequence length of descending detection reference signal, the bandwidth of descending detection reference signal, ZC sequential sampling length N zC, descending detection reference signal transmitting power.
19. 1 kinds of user equipment (UE)s, is characterized in that, this UE comprises the device as described in claim 14 to 18 any one.
20. 1 kinds of network equipments, is characterized in that, this network equipment, for issuing the descending detection reference signal being made up of ZC sequence and Cyclic Prefix or cyclic suffix to UE.
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CN113965441A (en) * 2021-10-20 2022-01-21 江苏科技大学 Radar communication integrated signal generating and receiving method based on random step frequency OFDM
CN113965441B (en) * 2021-10-20 2023-10-27 江苏科技大学 Radar communication integrated signal generation and receiving method based on random step frequency OFDM

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