CN101499813A - Preamble symbol sending method for WiMax & WiBro multicast relay system - Google Patents
Preamble symbol sending method for WiMax & WiBro multicast relay system Download PDFInfo
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- CN101499813A CN101499813A CNA2008100089753A CN200810008975A CN101499813A CN 101499813 A CN101499813 A CN 101499813A CN A2008100089753 A CNA2008100089753 A CN A2008100089753A CN 200810008975 A CN200810008975 A CN 200810008975A CN 101499813 A CN101499813 A CN 101499813A
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- noise ratio
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- interference noise
- carrier interference
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Abstract
The invention discloses a transmission method for leading symbols in a WiMax&WiBro multicast relay system, comprising the following steps: a multicast carrier interference noise ratio measuring mode transmitting module of a base station transmits the multicast carrier interference noise ratio measuring mode to a relay involving in the multicasting; a multicast carrier interference noise ratio measuring mode forward module of the relay forwards the multicast carrier interference noise ratio measuring mode received by a multicast carrier interference noise ratio measuring mode receiving module to users involving in the multicasting; a leading symbol transmitting module of the base station transmits the leading symbols to users; the leading symbol transmitting module of the base station and a leading symbol transmitting module of the relay transmit leading symbols to the users simultaneously; a multicast carrier interference noise ratio measuring module of the user monitors and measures the carrier signal interference noise ratio of the leading symbols in specific frames; and a multicast carrier signal interference noise ratio feedback module feedbacks the measured carrier signal interference noise ratio to the relay in the specific frames.
Description
Technical field
The present invention relates to the WiMax/WiBro system, particularly WiMax﹠amp; The leading symbol transmission method of WiBro multicast relay system.
Background technology
In the WiMax/WiBro system, need user's measurement to receive the carrier-in-interference noise ratio (CINR) of signal sometimes and feed back to the base station, make the base station to select suitable modulation coding mode according to this value.Leading symbol is the of paramount importance foundation during the carrier-in-interference noise ratio is measured.Specifically, the WiMAX system can be divided into two classes about the measurement of carrier-in-interference noise ratio, and a class is the measurement to common subchannel, and wherein the user need report the average CINR value of base station leading symbol; Another kind of is in the Adaptive Modulation and Coding operation, the CINR value of five self-channels that user report is best, and its concrete metering system depends on realization, can monitor leading symbol and user data.
When in the WiMax/WiBro relay system, transmitting multi-case data,, need the relaying of base station and participation multicast to transmit data simultaneously usually with same-code/modulation in order to promote signal power and to reduce and disturb.Under this load mode, the interference of neighboring relay stations or base station has become useful signal usually.From user side, can regard multipath signal as from the signal of different transmitting terminals, within the protection at interval of OFDM symbol as long as the difference between them can correctly receive as useful signal.This makes the user receive the channel of multi-case data and to receive the channel conditions of unicast data far from each other.
Two kinds of relayings have been defined, transparent relay and opaque relaying in the WiMax relay system draft at present.Whenever transparent relay is transmission preamble symbols not, and whenever all opaque relaying the transmission preamble symbol.Therefore opaque relaying and base station are transmitted descending schedule table simultaneously, can only be applicable to that the coverage with the base station does not have under the overlapping situation, for example outside subway station or the cell boarder.That is to say user's Multicast Channel of opaque relaying and unicast tunnel situation basically identical.Therefore the present invention pays close attention to transparent relay emphatically.
Because transparent relay is transmission preamble symbol not all the time, so the user will only react the channel conditions of clean culture according to the measurement that leading symbol carries out.
Summary of the invention
The purpose of this invention is to provide a kind of WiMax﹠amp; The leading symbol transmission method of WiBro multicast relay system.
For achieving the above object, a kind of WiMax﹠amp; The leading symbol transmission method of WiBro multicast relay system comprises step:
A) the multicast carrier interference noise ratio measurement pattern sending module of base station sends the multicast carrier interference noise ratio measurement pattern to the relaying that participates in multicast;
B) the multicast carrier interference noise ratio measurement pattern forwarding module of relaying, the multicast carrier interference noise ratio measurement pattern that multicast carrier interference noise ratio measurement pattern receiver module is received is transmitted to the user who participates in multicast;
C) leading symbol transmitting module of base station sends leading symbol to the user;
D) leading symbol transmitting module of the leading symbol transmitting module of base station and relaying sends leading symbol to the user simultaneously;
E) user's multicast carrier Signal Interference and Noise Ratio measurement module, the carrier interference noise ratio of monitoring and measurement leading symbol in the frame of regulation;
F) multicast carrier Signal Interference and Noise Ratio feedback module feeds back to relaying to the carrier interference noise ratio that measures in the frame of regulation.
Base station of the present invention can be adjusted leading symbol in real time according to the present flow rate situation and send, and also can arrange the leading symbol of clean culture and multicast to send in different frames respectively, thereby the carrier-in-interference noise ratio of taking into account clean culture and a plurality of different multicast groups is simultaneously measured.
Description of drawings
Fig. 1 is that the schematic diagram that leading symbol sends is finished in base station and relaying cooperation;
Fig. 2 is that the message flow chart that leading symbol sends is finished in base station and relaying cooperation;
Fig. 3 is that frequency duplex factor as one is 2 Manhattan model cell base station and relaying deployment situation;
Fig. 4 is the carrier-in-interference noise ratio plane geographic distribution of unicast tunnel;
Fig. 5 is the carrier-in-interference noise ratio plane geographic distribution of Multicast Channel;
Fig. 6 is the plane geographic distribution of the carrier-in-interference noise ratio difference of Multicast Channel and unicast tunnel;
Fig. 7 is the carrier-in-interference noise ratio distribution map of Multicast Channel and unicast tunnel.
Embodiment
The present invention constitutes the relay:
101. multicast carrier interference noise ratio measurement pattern receiver module, this module receives the multicast carrier interference noise ratio measurement pattern of sending from the multicast carrier interference noise ratio measurement pattern sending module 201 of base station; Wherein this measurement pattern has stipulated that carry out multicast carrier interference noise ratio in those frames in the future measures.
102. multicast carrier interference noise ratio measurement pattern forwarding module, the multicast carrier interference noise ratio measurement pattern that this module receives multicast carrier interference noise ratio measurement pattern receiver module 101 are transmitted to the user who participates in multicast;
103. leading symbol transmitting module, measure if the multicast carrier interference noise ratio measurement pattern that multicast carrier interference noise ratio measurement pattern receiver module 101 receives has stipulated to carry out multicast carrier interference noise ratio in present frame, then leading symbol transmitting module partly transmits leading symbol in the beginning of present frame;
104. multicast carrier interference noise ratio receiver module, measure if the multicast carrier interference noise ratio measurement pattern that multicast carrier interference noise ratio measurement pattern receiver module 101 receives has stipulated to carry out multicast carrier interference noise ratio in present frame, then the multicast carrier interference noise ratio receiver module receives the multicast carrier interference noise ratio of multicast carrier Signal Interference and Noise Ratio feedback module 303 transmissions that come from the user;
Constituting of base station end:
201. multicast carrier interference noise ratio measurement pattern sending module, this module sends the multicast carrier interference noise ratio measurement pattern to the relaying that participates in multicast;
202. leading symbol transmitting module, this module partly transmits leading symbol in the beginning of every frame;
Constituting of user side:
301. multicast carrier interference noise ratio measurement pattern receiver module, this multicast carrier interference noise ratio measurement pattern that module reception is sent from the base station or relaying is transmitted;
302. multicast carrier Signal Interference and Noise Ratio measurement module, this module according to the multicast carrier interference noise ratio measurement pattern that receives, monitor and measure the carrier interference noise ratio of leading symbol in the frame of regulation;
303. multicast carrier Signal Interference and Noise Ratio feedback module, this module feed back to relaying to the carrier interference noise ratio that measures according to the multicast carrier interference noise ratio measurement pattern that receives in the frame of regulation.
On the basis of said structure, the transmission schematic diagram that leading symbol is finished in the cooperation of base station and relaying as shown in Figure 1.Accompanying drawing 2 has provided the transmittance process of message.
Embodiment
Supposing has 1 base station in certain sub-district, 2 relayings are respectively 2,3 users of relaying 1 and relaying, are respectively user 1, user 2 and user 3.Wherein user 1 and user 2 belong to relaying 1, and wherein user 3 belongs to relaying 2, and relaying 1 and user 1 participate in multicast, relaying 2, and user 2 and user 3 have neither part nor lot in multicast.The detailed step following (as shown in Figure 2) of the transmission of leading symbol is finished in base station and relaying cooperation:
Step 2. is at the 0th frame, and the multicast carrier interference noise ratio measurement pattern receiver module 101 of relaying 1 receives the multicast carrier interference noise ratio measurement pattern of sending from the multicast carrier interference noise ratio measurement pattern sending module 201 of base station;
Step 3. is at the 0th frame, and the multicast carrier interference noise ratio measurement pattern forwarding module 102 of relaying 1 is transmitted to the user who participates in multicast to the multicast carrier interference noise ratio measurement pattern that receives, and promptly the user 1;
Step 4. is at the 0th frame, and user 1 multicast carrier interference noise ratio measurement pattern receives 301 and receives the multicast carrier interference noise ratio measurement pattern that the multicast carrier interference noise ratio measurement pattern forwarding module 102 from relaying 1 sends over;
Step 5. to the K-1 frame, is not carried out multicast carrier interference noise ratio measurement because the multicast carrier interference noise ratio measurement pattern is defined in these frames at the 1st frame, therefore has only the leading symbol transmitting module 201 of base station to send leading symbols;
Step 6. is at the K frame, because the multicast carrier interference noise ratio measurement pattern has stipulated that carrying out multicast carrier interference noise ratio at this frame measures, therefore participate in the leading symbol transmitting module 103 of relaying 1 of multicast and the leading symbol transmitting module 201 of base station, send leading symbol simultaneously;
Step 8. is at the K frame, because the multicast carrier interference noise ratio measurement pattern has stipulated that carrying out multicast carrier interference noise ratio at this frame measures, so user 1 multicast carrier Signal Interference and Noise Ratio feedback module 303 sends to relaying to the multicast carrier Signal Interference and Noise Ratio that multicast carrier Signal Interference and Noise Ratio measurement module 302 measures;
Step 9. is at the K frame, because the multicast carrier interference noise ratio measurement pattern has stipulated that carrying out multicast carrier interference noise ratio at this frame measures, so the multicast carrier interference noise ratio receiver module 104 of relaying 1 receives the multicast carrier interference noise ratio of sending from user 1 multicast carrier Signal Interference and Noise Ratio feedback module 303.
The present invention has provided a kind of leading symbol transmission method of multicast relay system, makes the user can measure the Signal Interference and Noise Ratio of Multicast Channel according to leading symbol.Generally, the user can only measure the Signal Interference and Noise Ratio of unicast tunnel, so the Signal Interference and Noise Ratio difference of Multicast Channel and unicast tunnel will be showed in this part.
We adopt the basic model of Manhattan model as system emulation, and its frequency duplex factor as one is 2, as shown in Figure 3.Wherein, the block is wide 200 meters, and the street is wide 30 meters, 4 relayings of each base station band, and the deployed position of base station and relaying is as shown in Figure 3.Channel model adopts the WINNER model, wherein, if transmit leg and recipient, think so that channel between the two is line-of-sight propagation at same the street, otherwise thinks non-line-of-sight propagation.Carrier-in-interference noise ratio distribution situation on our the major concern street.
Fig. 4 and Fig. 5 have provided the carrier-in-interference noise ratio of Multicast Channel and the carrier-in-interference noise ratio plane geographic distribution of unicast tunnel respectively, and Fig. 6 has provided the plane geographic distribution of the carrier-in-interference noise ratio difference of Multicast Channel and unicast tunnel.Fig. 7 has provided the carrier-in-interference noise ratio distribution map of Multicast Channel and unicast tunnel.From these figure as can be seen, both channels differ greatly.Under traditional approach, using unicast tunnel to substitute Multicast Channel will the substantially understate channel quality.
Claims (7)
1. WiMax﹠amp; The leading symbol transmission method of WiBro multicast relay system comprises step:
A) the multicast carrier interference noise ratio measurement pattern sending module of base station sends the multicast carrier interference noise ratio measurement pattern to the relaying that participates in multicast;
B) the multicast carrier interference noise ratio measurement pattern forwarding module of relaying, the multicast carrier interference noise ratio measurement pattern that multicast carrier interference noise ratio measurement pattern receiver module is received is transmitted to the user who participates in multicast;
C) leading symbol transmitting module of base station sends leading symbol to the user;
D) leading symbol transmitting module of the leading symbol transmitting module of base station and relaying sends leading symbol to the user simultaneously;
E) user's multicast carrier Signal Interference and Noise Ratio measurement module, the carrier interference noise ratio of monitoring and measurement leading symbol in the frame of regulation;
F) multicast carrier Signal Interference and Noise Ratio feedback module feeds back to relaying to the carrier interference noise ratio that measures in the frame of regulation.
2. method according to claim 1 is characterized in that described measurement pattern stipulated that carry out multicast carrier interference noise ratio in which frame in the future measures.
3. method according to claim 1 is characterized in that described leading symbol transmitting module partly transmits leading symbol in the beginning of present frame.
4. method according to claim 1 is characterized in that having only the relaying that participates in multicast can receive the multicast carrier interference noise ratio measurement pattern.
5. method according to claim 1 is characterized in that having only the user who participates in multicast can receive the multicast carrier interference noise ratio measurement pattern.
6. method according to claim 1 is characterized in that described relaying only just sends leading symbol in the frame of multicast carrier interference noise ratio measurement pattern regulation.
7. method according to claim 2 is characterized in that the user only just measures the multicast carrier interference noise ratio of leading symbol in the frame of multicast carrier interference noise ratio measurement pattern regulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100089753A CN101499813A (en) | 2008-02-02 | 2008-02-02 | Preamble symbol sending method for WiMax & WiBro multicast relay system |
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| CNA2008100089753A CN101499813A (en) | 2008-02-02 | 2008-02-02 | Preamble symbol sending method for WiMax & WiBro multicast relay system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108141809A (en) * | 2015-07-31 | 2018-06-08 | 高通股份有限公司 | For the technology of the joint transmission in unlicensed spectrum |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108141809A (en) * | 2015-07-31 | 2018-06-08 | 高通股份有限公司 | For the technology of the joint transmission in unlicensed spectrum |
| CN108141809B (en) * | 2015-07-31 | 2020-11-03 | 高通股份有限公司 | Techniques for joint transmission in unlicensed spectrum |
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Open date: 20090805 |