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System broadcast message transmission method and device

A technology of system broadcast message and transmission method, applied in the field of system broadcast message transmission method and device, can solve problems such as excessive broadcast message overhead, reduced antenna gain, and impact on overall network performance.

Active Publication Date: 2017-05-31
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In related technologies, it is mentioned that the beams of high-frequency sites are divided into two levels, one level is "wide beam", which is used to provide system broadcast messages to subordinate terminals, and the other level is "narrow beam" for data communication, but Due to the limitation of high-frequency transmission characteristics, communication through narrow beams is to use high antenna gain to compensate for path loss and attenuation. Compared with narrow beams, using wide beams means that the antenna gain is reduced. Wide beams are not necessarily It can guarantee the quality of transmission, especially for the transmission of relatively important system broadcast messages. If the coverage of edge users cannot be guaranteed, the overall performance of the network will be greatly affected
In order to take into account the coverage performance, the width of the beam will be greatly limited, so even if this solution can be applied, the reduction in overhead obtained is very limited
Therefore, this method cannot completely solve the problem of excessive system broadcast message overhead and low communication efficiency

Method used

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  • System broadcast message transmission method and device

Examples

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example 1

[0378] Figure 9 It is an application scenario corresponding to the present invention. In this example, a terminal initially accesses a cell under a high-frequency station. like Figure 10 As shown, the transmission method of the system broadcast message may include the following steps:

[0379] Step 1: System broadcast messages are distributed between the high-frequency station and the eNB; that is, the high-frequency station passes the first type of system broadcast message (that is, the cell-level system broadcast message) to the eNB, and requests the eNB to send it to the subordinate terminal for assistance;

[0380] High-level nodes configure eNB to distribute system broadcast messages for high-frequency sites, and notify eNB and high-frequency sites respectively. The high-level nodes here can be network management side network elements (such as equipment management system EMS, network management system NMS, operation and management system OAM, etc.), or a core network ...

example 2

[0392] exist Figure 9 In the illustrated application scenario, in this example, the terminal initially accesses a cell under the high-frequency site. like Figure 11 As shown, the transmission method of the system broadcast message may include the following steps:

[0393] Step 1: The high-frequency station and the eNB determine the system broadcast message shunt transmission, and the high-frequency station passes the first type of system broadcast message (that is, the cell-level system broadcast message) to the eNB, and requests the eNB to send it to the subordinate terminal for assistance;

[0394] The way to determine the offload transmission is: the high-frequency station sends a "first-type system broadcast message offload transmission request message" to the eNB, and requests the eNB to offload and transmit the first-type system broadcast message for it (the request message includes the identity of the subordinate cell of the high-frequency station , and the size of ...

example 3

[0406] exist Figure 12 In the illustrated application scenario, in this example, the terminal initially accesses a cell under the low-frequency network. like Figure 13 As shown, the transmission method of the system broadcast message may include the following steps:

[0407]The difference between this example and Example 1 is that after the terminal is powered on, it first accesses cell1 of the low-frequency network eNB. When there is a service suitable for high-frequency transmission, it starts to search for the high-frequency band. At this time, the eNB can provide assistance to the terminal. Information, such as the operating frequency of high-frequency cells within the coverage of the eNB, cell identifiers, time-frequency location information of synchronization signals, etc., the terminal searches for cells with high signal strength in the high-frequency cell list provided by the eNB, and detects high-frequency sites For the sent synchronization signal, the identity of...

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Abstract

The present invention discloses a system broadcast message transmission method. The system broadcast message transmission method is applied to a first class site. The method comprises: determining whether the system broadcast message shunt transmission is performed or not between the first class site and a second class site; sending the first class system broadcast message to the second class site after determining the system broadcast message shunt transmission is performed between the first class site and the second class site, wherein the first class site employs an antenna emission wave beam with a wave beam feature; allowing the second class site to employ a wave beam having wider wave beam width than the first class site for emission, or employ a section mode for emission or employ a quasi omnidirectional or omnidirectional mode for emission; overlapping the coverage range of a subordinate cell of the second class site and the coverage range of a subordinate cell of the first class site; and allowing the first class system broadcast message to carry the cell-grade common system information of the subordinate cell of the first class site. The system broadcast message transmission method and device can reduce the expense of the system broadcast message of a high-frequency communication system and improve the coverage performance.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method and device for transmitting system broadcast messages. Background technique [0002] With the continuous advancement of radio technology, a large number of various radio services have emerged, and the spectrum resources on which radio services rely are limited. Facing the continuous increase in people's demand for bandwidth, traditional commercial communications mainly use 300MHz~3GHz Spectrum resources are extremely tense, which cannot meet the needs of future wireless communications. [0003] In the future wireless communication, carrier frequencies higher than those used in the fourth generation (4G) communication system will be used for communication, such as 28GHz, 45GHz, etc. This high-frequency channel has a large free propagation loss, The shortcomings of being easily absorbed by oxygen and greatly affected by rain attenuation have seriously affect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06
CPCH04W4/06
Inventor 刘星刘文豪毕峰
Owner ZTE CORP
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