Pilot resource distribution method, system and equipment

Abstract

The present invention provides a method, a system and a device for collocating pilot frequency resource. The time frequency resource in the uplink pilot time slot (UpPTS) is allocated to uplink pilot with an uplink pilot resource allocating mode of common subframe, or the time-frequency resource except the time-frequency resource taken by packet random access channel (PRACH) in the UpPTS is allocated to the uplink pilot. The resource allocation result is transmitted a mobile terminal. The resource allocation of uplink pilot in the UpPTS is realized and the mobile terminal can transmit uplink pilot on the time-frequency resource allocated to the uplink pilot according to the resource allocation result transmitted by the base station. Correspondingly the base station can use the uplink pilot frequency for estimating channel thereby demodulating the data in the UpPTS.

Description

technical field

[0001] The present invention relates to mobile communication technology, in particular to a pilot resource allocation method, system and equipment. Background technique

[0002] Time-division synchronous code-division multiple access (TD-SCDMA) is the only technology that adopts time-division duplex (TDD) among the three major international standards of the third-generation mobile communication system. The TD-SCDMA system supports uplink and downlink asymmetric service transmission. Spectrum has greater flexibility. In order to maintain the long-term competitiveness of the TD-SCDMA system, the TD-SCDMA system also needs to continuously evolve and improve its capabilities.

[0003] In the long-term evolution scheme (LTE TDD) of the TD-SCDMA system, adopt such as figure 1 The radio frame structure shown. figure 1 It is a wireless frame structure diagram of the LTE TDD system in the prior art, such as figure 1 As shown, the length of the wireless frame is 10...

Examples

Embodiment 1

[0055] Use the uplink pilot resource allocation mode in the normal subframe to allocate the time-frequency resources in the UpPTS to the uplink pilot, that is, allocate forward from the last SC-FDMA symbol of the UpPTS, and in the case of a short CP, use 7 SCs -FDMA symbol is one cycle, such as Figure 3a As shown, in this cycle, the fourth SC-FDMA symbol is allocated to the uplink pilot. In the case of long CP, 6 SC-FDMA symbols are used as a cycle, such as Figure 3b As shown, in this period, the third SC-FDMA symbol is allocated to the uplink pilot until the first SC-FDMA symbol of the UpPTS. For example, in the case of a short CP, when the length of the UpPTS is 7, the time-frequency resource allocation status of the UpPTS is as follows: Figure 4a As shown, the PRACH is allocated in the first two SC-FDMA symbols of the UpPTS, and the fourth SC-FDMA symbol of the UpPTS is allocated to the uplink pilot.

[0056] In this embodiment, when the length of the UpPTS is 6 to 10 ...

Embodiment 2

[0063] Allocate other configured time-frequency resources in the UpPTS except the time-frequency resources occupied by the PRACH to the uplink pilot. This distribution method can include the following situations:

[0064] First, when time-frequency resources are not allocated to PRACH, allocate the time-frequency resources occupied by any one or more configured SC-FDMA symbols in the UpPTS to the uplink pilot, and use the system message to assign the result sent to the mobile terminal. This way works for UpPTS of any length. For example, in the case of a short CP, if the length of the UpPTS is 2, it can be set to allocate the time-frequency resource occupied by the first SC-FDMA symbol in the UpPTS to the uplink pilot, such as Figure 4b shown.

[0065] If the mobile terminal knows from the system message sent by the base station that no PRACH is set in the UpPTS, it can send the uplink pilot within the time-frequency resource occupied by any one of the set SC-FDMA symbols ...

technical field

[0001] The present invention relates to mobile communication technology, in particular to a pilot resource allocation method, system and equipment. Background technique

[0002] Time-division synchronous code-division multiple access (TD-SCDMA) is the only technology that adopts time-division duplex (TDD) among the three major international standards of the third-generation mobile communication system. The TD-SCDMA system supports uplink and downlink asymmetric service transmission. Spectrum has greater flexibility. In order to maintain the long-term competitiveness of the TD-SCDMA system, the TD-SCDMA system also needs to continuously evolve and improve its capabilities.

[0003] In the long-term evolution scheme (LTE TDD) of the TD-SCDMA system, adopt such as figure 1 The radio frame structure shown. figure 1 It is a wireless frame structure diagram of the LTE TDD system in the prior art, such as figure 1 As shown, the length of the wireless frame is 10...

Examples

Embodiment 1

[0055] Use the uplink pilot resource allocation mode in the normal subframe to allocate the time-frequency resources in the UpPTS to the uplink pilot, that is, allocate forward from the last SC-FDMA symbol of the UpPTS, and in the case of a short CP, use 7 SCs -FDMA symbol is one cycle, such as Figure 3a As shown, in this cycle, the fourth SC-FDMA symbol is allocated to the uplink pilot. In the case of long CP, 6 SC-FDMA symbols are used as a cycle, such as Figure 3b As shown, in this period, the third SC-FDMA symbol is allocated to the uplink pilot until the first SC-FDMA symbol of the UpPTS. For example, in the case of a short CP, when the length of the UpPTS is 7, the time-frequency resource allocation status of the UpPTS is as follows: Figure 4a As shown, the PRACH is allocated in the first two SC-FDMA symbols of the UpPTS, and the fourth SC-FDMA symbol of the UpPTS is allocated to the uplink pilot.

[0056] In this embodiment, when the length of the UpPTS is 6 to 10 ...

Embodiment 2

[0063] Allocate other configured time-frequency resources in the UpPTS except the time-frequency resources occupied by the PRACH to the uplink pilot. This distribution method can include the following situations:

[0064] First, when time-frequency resources are not allocated to PRACH, allocate the time-frequency resources occupied by any one or more configured SC-FDMA symbols in the UpPTS to the uplink pilot, and use the system message to assign the result sent to the mobile terminal. This way works for UpPTS of any length. For example, in the case of a short CP, if the length of the UpPTS is 2, it can be set to allocate the time-frequency resource occupied by the first SC-FDMA symbol in the UpPTS to the uplink pilot, such as Figure 4b shown.

[0065] If the mobile terminal knows from the system message sent by the base station that no PRACH is set in the UpPTS, it can send the uplink pilot within the time-frequency resource occupied by any one of the set SC-FDMA symbols ...

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