Consumer terminal access method, system and device in high level long-term evolutionary progression system

Abstract

The invention discloses a consumer terminal access method and system in a high level long-term evolutionary progression system which comprises: a relay node determines whether itself at an overloading or underloading state, if at the overloading state, the transmission power of sent broadcasting messages are reduced according to the predetermined requirement; if at the underloading state, the transmission power of the sent broadcasting messages is accreted according to the predetermined requirement; a user terminal receives the broadcasting messages from a base station and the relay node, determines a signal to interference ratio corresponding to different broadcasting messages, the sending terminal of the broadcasting messages corresponding to the signal to interference ratio with the maximal value is acted as an access point, and the access in finished. The invention also discloses a delay node which is applied to the method, system and device of the invention, and can improve the average throughput of the system and improve the service performance of the system.

Description

technical field [0001] The present invention relates to advanced long-term evolution technology, in particular to a user terminal (UE, UserEquipment) access method, system and device in an advanced long-term evolution system (LTE-A, Long Term Evolution-Advanced). Background technique [0002] In the existing LTE-A system, by introducing a relay node (RS, Relay Station) between the base station (eNB) and the UE, the coverage quality of the network, the capacity of the system and the resource utilization of the system can be improved effectively. [0003] At the same time, the introduction of the relay node also significantly increases the types of links in the LTE-A system, including: the downlink from the base station to the relay node, the uplink from the relay node to the base station, and the link from the relay node to the UE. Downlink, uplink from UE to relay node, and traditional downlink from base station to UE and uplink from UE to base station. Among them, the down...

AI Technical Summary

Problems solved by technology

Then in practical applications, the following problems may occur, that is, the throughput of the trunk backhaul link cannot meet the demand of the business volume, that is, the throughput of the trunk backhaul link is smaller than the throughput of the trunk access link , resulting in the bottleneck effect of the relay backhaul link, especially in the downlink direction, affected by factors such as the service type of the UE, this bottleneck effect will be more obvious

In order to solve the problem of the bottleneck effect, in the prior art, for the LTE-A system adopting Time Division Duplex (TDD, Time Division Duplex) mode, considering the partial OFDM in the special subframe in each frame (OFDM, Orthogonal Frequency Division Multiplexing) symbols can be used for downlink data transmission in the downlink direction. Therefore, these OFDM symbols are used for data transmission on the downlink backhaul link, but the effect of this method is really effective, basically can't solve the problem

[0006] In addition, the placement of the relay node will also cause the bottleneck effect of the relay backhaul link. For example, the relay node is placed at the position that can bring the best signal-to-interference ratio of the The UE served by the relay node is relatively close to the relay node, so the possibility of line-of-sight transmission will be greatly enhanced. In this case, the bottleneck effect of the relay backhaul link may also occur

[0007] Furthermore, the placement of the relay node may also cause the bottleneck effect of the relay access link. For example, the relay node is placed in a location that can bring sufficiently small shadow fading and a sufficiently good relay backhaul link signal. In order to ensure the reliable transmission of the relay backhaul link, the path loss of the relay backhaul link will be greatly reduced. In this case, the bottleneck effect of the relay access link may occur. That is, the quality of the backhaul link of the relay is better, and the throughput that can be provided is greater than that of the access link of the relay

[0008] Regardless of the bottleneck effect of the relay backhaul link or the bottleneck effect of the relay access link, the average throughput of the system will decrease and the service performance of the system will be affected. However, there is no effective method in the prior art. The method that solves above-mentioned bottleneck effect problem

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