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Signal transmission method, system and device for system joint networking

A time slot and time technology, which is applied in the field of signal transmission and can solve problems such as implementation schemes for reducing mutual interference of signals

Active Publication Date: 2011-11-30
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0030] As mentioned above, in the prior art, when the TD-SCDMA system and the TD-LTE system are jointly networked, there is no implementation scheme to reduce the signal interference between the two systems

Method used

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  • Signal transmission method, system and device for system joint networking
  • Signal transmission method, system and device for system joint networking
  • Signal transmission method, system and device for system joint networking

Examples

Experimental program
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Embodiment 1

[0083] This embodiment is a basic configuration scheme, that is, the power ramp-up time of the base station transmitter is not considered, and the details are as follows:

[0084] Ta: Indicates the time occupied by uplink time slots (UpPTs+uplink service time slots) in a radio frame of the TD-SCDMA system;

[0085] Tb: Indicates the time occupied by uplink time slots (UpPTs+uplink business time slots) in a wireless frame of the TD-LTE system;

[0086] According to the relationship between Ta and Tb, if the frame structures of the two systems can coexist, that is, there is no signal interference, there are the following two situations, which are analyzed as follows:

[0087] Case 1: If Figure 4A As shown, Tb>Ta, in this case, if the frame structures of the two systems can coexist, the following conditions need to be met:

[0088] TaCDMA ;

[0089] Case 2: If Figure 4B As shown, Tb

Embodiment 2

[0099] This embodiment is a supplementary configuration scheme, that is, considering the power ramp-up time of the base station transmitter, the details are as follows:

[0100] In actual equipment, it takes a certain amount of equipment switching time for the base station to switch from uplink reception to downlink transmission. In the TD-SCDMA system, there are always 16 chips of idle time after each time slot that can be used for equipment switching, but This switching time is not reserved in the frame structure of TD-LTE. This makes it necessary for the terminal of the TD-LTE system to consider the switching time of UL→DL at the base station side when transmitting, and to perform early transmission. Specific as Figure 5A Shown:

[0101] in, Figure 5A The timing advance shown in includes not only the UL→DL switching time to ensure the base station side, but also the terminal signal transmission time due to the distance. The current standard preliminarily determines th...

Embodiment 3

[0122] Embodiment 3: The scheme of closing some time slots

[0123] In this embodiment, the TD-SCDMA system 4:3 (uplink time slot: downlink time slot) is used to illustrate the solution.

[0124] Step 1: According to the description in the second embodiment, determine the available TD-LTE time slot configuration, and find that there is no available time slot configuration, that is, for the 4:3 time slot configuration structure in the TD-SCDMA system, there is no The available TD-LTE subframe structure can coexist with it;

[0125] Step 2: For the time slot configuration structure of 4:3 in the TD-SCDMA system, determine the TD-LTE frame structure configuration 2:1:2 with the least intersecting time slot with the time slot configuration structure; Figure 6A shown;

[0126] Step 3: The UpPTs in the 4:3 time slot configuration structure in the TD-SCDMA system are transferred (shifting), it is moved to the end of the time slot 1 (TS1) of TD-SCDMA and aligned with the end, such ...

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Abstract

The invention discloses a method, a system and equipment for transmitting signals during joint networking of systems, which relate to the field of wireless communication and are used for reducing the degree of mutual interference among system signals during the joint networking of the systems. In the invention, a base station is used for determining a first wireless frame structure used in a timedivision-synchronization code division multiple access (TD-SCDMA) system, a second wireless frame structure which is used in a time division-long term evolution (TD-LTE) system and a first frame header offset; the first frame header offset is a difference value between the start time of a first wireless frame and the start time of a second wireless frame when a switch time point from an uplink toa downlink in the first wireless frame with the first wireless frame structure is aligned with a switch time point from an uplink to a downlink in the second wireless frame with the second wireless frame structure; and according to the first frame header offset, the signals of the TD-SCDMA system are received and transmitted by using the first wireless frame, and the signals of the TD-LTE system are received and transmitted by using the second wireless frame. By the method, the system and the equipment, the degree of the mutual interference among the signals of the two systems can be effectively reduced.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a signal transmission method, system and equipment for system joint networking. Background technique [0002] Driven by the market, mobile communication technology continues to develop. While the third-generation mobile communication technology including Time Division Synchronous Code Division Multiple Access (TD-SCDMA) has gradually matured and entered the commercial development stage, the evolution of the technology and the prospect of the new generation system have begun. 3GPP's work on Long-Term Evolution (LTE) is a typical representative of technology evolution in the post-3G era. The process of technology research, system standardization, and industrial development planning is an important direction for the development of mobile communication technology. The LTE system supports frequency division duplex (FDD) and time division duplex (TDD) two duplex methods, ...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04B7/26
CPCH04B7/2618H04W16/14
Inventor 石蕊高卓索士强
Owner DATANG MOBILE COMM EQUIP CO LTD
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