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Coexistent method for LTE TDD system and TD-SCDMA system

A TD-SCDMA, the technology of this system, applied in the field of third-generation mobile communication, can solve the problems of inter-system interference, unable to achieve smooth evolution of LTE TDD system, and inability of systems to coexist, and achieve the effect of solving inter-system interference

Active Publication Date: 2011-12-07
DATANG MOBILE COMM EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] It can be seen from the above that the LTE TDD system using the frame structure of the existing improved scheme will generate serious inter-system interference with the TD-SCDMA system, making the two systems Unable to coexist, so smooth evolution from TD-SCDMA system to LTE TDD system cannot be realized

Method used

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  • Coexistent method for LTE TDD system and TD-SCDMA system
  • Coexistent method for LTE TDD system and TD-SCDMA system
  • Coexistent method for LTE TDD system and TD-SCDMA system

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Embodiment 1

[0049] When the LTE TDD system uses the Type 1 improvement scheme of Type 2, the coexistence method of the two systems in the case of different time slot ratios in the TD-SCDMA system is as follows: Figure 8 shown. According to the time slot ratio configured in the TD-SCDMA system, the LTE TDD system moves the subframe position to the position shown in the figure through the configuration of high-level signaling, and aligns the UDSP of the LTE TDD system with the UDSP of the TD-SCDMA system. Then, adjust the structure of special time slots in the LTE TDD system, that is, by adjusting the lengths of DwPTS, GP and UpPTS, align the center position of GP with the center position of GP in TD-SCDMA system, align the DUSP of LTE TDD system with the The DUSP system of the system is aligned, so as to realize the coexistence of the two systems.

[0050] Such as Figure 8 , where the first row represents the frame structure of the first type of improved scheme in the existing LTE TDD ...

Embodiment 2

[0055] When the LTE TDD system uses the second type of improved scheme a of Type 2, that is, the special time slot is equal to the regular time slot and the length is equal to 1 millisecond, the coexistence method of the two systems in the case of different time slot ratios in the TD-SCDMA system is as follows: Figure 9 shown.

[0056] According to the time slot ratio configured in the TD-SCDMA system, the LTE TDD system aligns the UDSP of the system with the UDSP of the TD-SCDMA system through the configuration of frame position offset and uplink and downlink time slot allocation. Then, by adjusting the position and structure of special time slots in the LTE TDD system, align the central position of the GP with the central position of the GP in the TD-SCDMA system (that is, ensure that the DUSPs of the two systems are aligned), so as to realize the coexistence of the two systems. For example, when the uplink and downlink allocation mode of the TD-SCDMA system is 2 / 5 allocati...

Embodiment 3

[0059] When the LTE TDD system uses the second improved scheme b of Type2, the coexistence method of the two systems in the case of different time slot ratios in the TD-SCDMA system is as follows: Figure 10 shown. According to the time slot ratio configured in the TD-SCDMA system, the LTE TDD system aligns the UDSP of the system with the UDSP of the TD-SCDMA system through the movement of the frame position and the configuration of uplink and downlink time slot allocation. Then, by adjusting the position and structure of the special time slot in the LTE TDD system, the center position of the GP is aligned with the center position of the GP in the TD-SCDMA system (that is, to ensure that the DUSPs of the two systems are aligned), so as to realize the coexistence of the two systems. When the TD-SCDMA system is under some specific time slot ratio (such as Figure 10 shown 2 / 5 allocation or 5 / 2 allocation), if the scheme of 9 regular time slots and 1 special time slot with each ...

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Abstract

The invention discloses a coexistence method of systems, comprising the steps: a LET TDD system acquires the DUSP (downlink to uplink switching point) information of a TD-SCDMA system as well as the UDSP (uplink to downlink switching point) information of the TD-SCDMA system; the LTE TDD system aligns the UDSP of the system and the UDSP of the TD-SCDMA system, as well as the DUSP of the system with the DUSP of the TD-SCDMA system. The method moves the UDSP in the LET TDD system to a position aligned with the UDSP of the TD-SCDMA and then moves the DUSP in the LTE TDD system to a position aligned with the DUSP in the TD-SCDMA system, thus effectively solving the problem that the interference between systems is generated when two systems are in adjacent frequency and shared address and realizing the coexistence of systems.

Description

technical field [0001] The invention relates to the third-generation mobile communication technology, in particular to a method for the coexistence of a long-term evolution time-division duplex LTE TDD system and a time-division-synchronous code division multiple access TD-SCDMA system. Background technique [0002] At present, the technology of the third-generation mobile communication system is becoming more and more mature. This technology adopts Code Division Multiple Access (CDMA) technology to support higher communication bandwidth, so that multimedia communication services can be realized. Compared with the current communication technology, it has Strong technical advantages, so the application prospect is very broad. In order to enable the third-generation mobile communication technology to continuously update its technology and ensure its competitiveness in a longer period of time, thereby prolonging the commercial application cycle of the third-generation mobile co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04B7/26
Inventor 索士强潘学明唐海孙韶辉谢永斌
Owner DATANG MOBILE COMM EQUIP CO LTD
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