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Preamble symbol sending method for WiMax & WiBro multicast relay system

A technology of preamble symbols and transmission methods, applied in radio relay systems, transmission systems, electrical components, etc.

Inactive Publication Date: 2009-08-05
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The opaque relay and the base station transmit the downlink schedule at the same time, so it can only be applied when there is no overlap with the coverage of the base station, such as a subway station or outside the cell boundary

Method used

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  • Preamble symbol sending method for WiMax & WiBro multicast relay system
  • Preamble symbol sending method for WiMax & WiBro multicast relay system
  • Preamble symbol sending method for WiMax & WiBro multicast relay system

Examples

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Embodiment

[0036] Assume that there is 1 base station, 2 relays, namely relay 1 and relay 2, and 3 users in a certain cell, respectively user 1, user 2 and user 3. User 1 and user 2 belong to relay 1, and user 3 belongs to relay 2. Relay 1 and user 1 participate in the multicast, while relay 2, user 2 and user 3 do not participate in the multicast. The detailed steps for the cooperation between the base station and the relay to complete the transmission of the preamble symbols are as follows (for example figure 2 shown):

[0037] Step 1. At frame 0, the multicast carrier-to-interference-to-noise ratio measurement mode sending module 201 of the base station sends the multicast carrier-to-interference-to-noise ratio measurement mode to the relay participating in the multicast, that is, relay 1; Carrying out multicast carrier-to-interference-to-noise ratio measurement in the Kth frame;

[0038] Step 2. At frame 0, the multicast carrier-to-interference-to-noise ratio measurement mode rece...

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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 [0001] The invention relates to a WiMax / WiBro system, in particular to a method for sending a leading symbol of a WiMax&WiBro multicast relay system. Background technique [0002] In the WiMax / WiBro system, sometimes the user needs to measure the carrier-to-interference-noise ratio (CINR) of the received signal and feed it back to the base station, so that the base station can select an appropriate modulation and coding method according to the value. The preamble symbol is the most important basis in the measurement of the carrier-to-interference-to-noise ratio. Specifically, the measurement of the carrier-to-interference-noise ratio in the WiMAX system can be divided into two categories, one is the measurement of ordinary sub-channels, in which the user needs to report the average CINR value of the preamble symbol of the base station; In operation, the user reports the CINR value of the best five self-channels. The specific measurement method depends on the...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04B7/14
Inventor 吴起
Owner SAMSUNG ELECTRONICS CO LTD
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