CN103096349B - A kind of method and apparatus being dynamically determined USTP value - Google Patents

Abstract

It is an object of the invention to provide a kind of method and apparatus being dynamically determined USTP value.According to the solution of the present invention, it is provided that one is dynamically determined device, described in be dynamically determined device and include: acquisition device, for obtaining the channel environmental information of the movement station corresponding with described base station；Determine device, for determining current dynamic USTP value according to described channel environmental information；Dispensing device, for will determined by dynamically USTP value send extremely described movement station.The present invention also provides for a kind of period modulation device, and described adjusting apparatus includes: receives device, receives described dynamic USTP；Adjusting apparatus, adjusts described movement station according to described dynamic USTP and sends the cycle of SRS.The present invention can be dynamically determined the value of USTP, makes the CSI of movement station realize preferably mating with the descending transmission channel being connected Wave beam forming.

Description

Method and device for dynamically determining USTP value

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for dynamically determining a USTP value.

Background

In the current TDD beamforming system, a base station receives a Sounding Reference Signal (SRS) periodically transmitted by a mobile station, estimates Channel State Information (CSI) of the mobile station based on the SRS, and generates a beam vector for downlink data transmission through channel reciprocity of the TDD system using the CSI. However, due to the limitation of the TDD framework structure and the overhead of the uplink sounding pilot, CSI delay and channel estimation error may inevitably occur during the CSI estimation and use. In a system in practical use in general, such as a TDD LTE system, if a 3gpp R8 or R9 protocol is adopted, a fixed uplink sounding time-domain periodicity (USTP) for controlling CSI delay is configured for each mobile station by a second-layer scheduling device, but for a fast change of a channel environment where a high-speed mobile station is located, a mechanism adopting the fixed USTP may cause a throughput of a beamforming system to be greatly reduced; however, if the 3GPP R10 protocol is adopted, the time domain period value of the SRS is configured by the third layer and cannot be changed according to the change of the channel environment, and also the optimal matching between the CSI of the transmission apparatus and the transmission channel formed by the downlink connection beam cannot be ensured.

Disclosure of Invention

The invention aims to provide a method and a device for dynamically determining a USTP value.

According to an aspect of the present invention, there is provided a dynamic determination apparatus for determining a dynamic USTP, wherein the dynamic determination apparatus is included in a base station, wherein the dynamic determination apparatus includes:

acquiring means for acquiring channel environment information of a mobile station corresponding to the base station;

determining means for determining a current dynamic USTP value according to the channel environment information;

transmitting means for transmitting the determined dynamic USTP value to the mobile station.

According to another aspect of the present invention, there is also provided a period adjusting apparatus for adjusting a period of a transmitted SRS according to a dynamic uspp value, wherein the period adjusting apparatus is included in a mobile station, wherein the adjusting apparatus comprises:

a receiving device for receiving the dynamic USTP, wherein the dynamic USTP value is from a base station corresponding to the mobile station;

and an adjusting device for adjusting the period of SRS transmission of the mobile station according to the dynamic USTP.

According to another aspect of the present invention, there is also provided a method for dynamically determining a USTP value in a base station, wherein the method comprises the steps of:

a, acquiring channel environment information of a mobile station corresponding to the base station;

b, determining the current USTP value according to the channel environment information;

c transmitting the dynamic USTP value to the mobile station. .

According to another aspect of the present invention, there is also provided a method of adjusting a period for transmitting an SRS according to a dynamic USTP value in a mobile station, wherein the method comprises the steps of:

-receiving the dynamic USTP value, wherein the dynamic USTP value is from a base station corresponding to the mobile station;

-adjusting the periodicity of the mobile station transmission of SRS according to the dynamic uspp value.

According to still another aspect of the present invention, there is further provided a communication system, including a base station and a mobile station corresponding to the base station, wherein the base station includes the dynamic determination device, and the mobile station includes the period adjustment device.

Compared with the prior art, the invention has the following advantages: the base station according to the invention can adjust the USTP value according to the channel environment of the mobile station, and transmits the USTP value to the mobile station, so that the mobile station can adjust the period of sending SRS by itself according to the USTP value. Therefore, the CSI of the mobile station can be better matched with a transmission channel formed by downlink connection beam forming.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a schematic diagram of a communication system according to the present invention;

fig. 2 is a flowchart of a method for dynamically determining the USTP value in the base station and adjusting the period for transmitting the SRS in the mobile station according to the dynamic USTP value according to the present invention.

The same or similar reference numbers in the drawings identify the same or similar elements.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

Fig. 1 shows a schematic structural diagram of a communication system of the present invention. The communication system includes, but is not limited to, a 3GPP LTE based wireless communication system. The communication system includes a base station and a mobile station. The base station includes but is not limited to a BS, an e-NodeB, a home base station, a macro base station, etc. The mobile station includes electronic devices that can communicate with the base station, directly or indirectly, in a wireless manner, including but not limited to cell phones, PDAs, and the like. Preferably, the communication system is a multiple-input single-output system, wherein the base station includes a plurality of antennas, and the mobile station includes at least one antenna.

It should be noted that those skilled in the art should understand that the communication system, the base station, and the mobile station are not limited to the above description.

The base station according to the invention comprises dynamic determination means 1, wherein said dynamic determination means comprise first acquisition means 11, determination means 12 and transmission means 13. The mobile station according to the present invention comprises a period adjusting means 2, wherein said period adjusting means 2 comprises a receiving means 21 and an adjusting means 22.

The acquisition means 11 acquires channel environment information of a mobile station corresponding to the base station. Wherein the channel environment information includes at least one of the following information: 1) pilot signal-to-noise ratio information; 2) maximum doppler shift information.

A person skilled in the art may determine a manner of obtaining channel environment information of the mobile station corresponding to the base station according to actual conditions and requirements, for example, a manner of evaluating and obtaining pilot signal-to-noise ratio information and/or maximum doppler shift information of the mobile station by using a current LTE product, and the like, which is not described herein again.

Then, the determining means 12 determines the current dynamic USTP value according to the channel environment information.

Specifically, the determining means 12 determines the current dynamic USTP value according to a predefined correspondence between the channel environment information and the USTP value. Preferably, the current dynamic USTP value is calculated and obtained according to the channel environment information based on a predetermined formula.

For example, when the obtaining device 11 obtains the pilot signal-to-noise ratio information, the current dynamic USTP value is determined according to a predetermined formula of the USTP value obtained by calculation according to the pilot signal-to-noise ratio information.

More preferably, the channel environment information includes the pilot signal-to-noise ratio information and the maximum doppler shift information, wherein the determining device 11 determines the current dynamic uspp value according to the following formula:

wherein κ is a number of pilot symbols per data symbol determined by a control system of the base station,determined according to the following formula:wherein, $A=\sqrt[3]{\sqrt{\frac{1}{2^6{\left(\mathrm{\π}{F}_d{T}_s\right)}^4{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^2}-\frac{125}{6192{\left(\mathrm{\π}{F}_d{T}_s\right)}^2{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^4}}-\frac{125}{1728{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^3}+\frac{1}{2^3{\left(\mathrm{\π}{F}_d{T}_s\right)}^2{\mathrm{\γ}}_p\mathrm{\κ}}},$ B＝144(γ_pκ)²，wherein, F is_dAs maximum Doppler shift information, gamma_pIs pilot signal-to-noise ratio information.

The transmitting means 13 transmits the determined USTP value to the mobile station.

Next, the reception device 21 included in the period adjustment device 2 located in the mobile station receives the dynamic USTP value.

Then, the adjusting means 22 adjusts the period of SRS transmission by the mobile station according to the dynamic uspp value.

According to the scheme of the invention, the base station can adjust the value of the USTP according to the channel environment of the mobile station, and transmits the value of the USTP to the mobile station, so that the mobile station can adjust the period of sending the SRS by the mobile station according to the value of the USTP. Therefore, the CSI of the mobile station can be better matched with a transmission channel formed by downlink connection beam forming.

Fig. 2 is a flow chart illustrating a method for dynamically determining the USTP value in the base station and adjusting the period for transmitting the SRS in the mobile station according to the dynamic USTP value according to the invention. The method according to the present invention includes step S11, step S12, step S13, step S21, and step S22.

In step S11, the dynamic determination device acquires channel environment information of a mobile station corresponding to the base station. Wherein the channel environment information includes at least one of the following information: 1) pilot signal-to-noise ratio information; 2) maximum doppler shift information.

A person skilled in the art may determine a manner of obtaining channel environment information of the mobile station corresponding to the base station according to actual conditions and requirements, for example, a manner of evaluating and obtaining pilot signal-to-noise ratio information and/or maximum doppler shift information of the mobile station by using a current LTE product, and the like, which is not described herein again.

Next, in step S12, the dynamic determination means determines the current dynamic uspp value from the channel environment information.

Specifically, the dynamic determination means determines the current dynamic USTP value according to the correspondence between the predefined channel environment information and the USTP value. Preferably, the dynamic determination means calculates and obtains a current dynamic USTP value according to the channel environment information based on a predetermined formula.

For example, when the dynamic determination means obtains the pilot signal-to-noise ratio information in step S11, the current dynamic USTP value is determined according to a predetermined formula of the USTP value obtained by calculation from the pilot signal-to-noise ratio information.

More preferably, the channel environment information includes the pilot signal-to-noise ratio information and the maximum doppler shift information, and the dynamic determination device determines the current dynamic uspp value according to the following formula:

wherein κ is a number of pilot symbols per data symbol determined by a control system of the base station,determined according to the following formula:wherein, $A=\sqrt[3]{\sqrt{\frac{1}{2^6{\left(\mathrm{\π}{F}_d{T}_s\right)}^4{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^2}-\frac{125}{6192{\left(\mathrm{\π}{F}_d{T}_s\right)}^2{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^4}}-\frac{125}{1728{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^3}+\frac{1}{2^3{\left(\mathrm{\π}{F}_d{T}_s\right)}^2{\mathrm{\γ}}_p\mathrm{\κ}}},$ B＝144(γ_pκ)²，wherein, F is_dAs maximum Doppler shift information, gamma_pIs pilot signal-to-noise ratio information.

Next, in step S13, the dynamic determination means transmits the determined USTP value to the mobile station.

Next, in step S21, the period adjustment means located in the mobile station receives the dynamic USTP value.

Then, a period adjusting means adjusts the period in which the mobile station transmits the SRS, based on the dynamic uspp value.

According to the scheme of the invention, the base station can adjust the value of the USTP according to the channel environment of the mobile station, and transmits the value of the USTP to the mobile station, so that the mobile station can adjust the period of sending the SRS by the mobile station according to the value of the USTP. Therefore, the CSI of the mobile station can be better matched with a transmission channel formed by downlink connection beam forming.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Claims (6)

1. A dynamic determination apparatus for determining a dynamic uplink sounding time domain period, USTP, wherein the dynamic determination apparatus is included in a base station, wherein the dynamic determination apparatus comprises:

acquiring means for acquiring channel environment information of a mobile station corresponding to the base station;

determining means for determining a current dynamic USTP value according to the channel environment information, wherein the channel environment information includes pilot signal-to-noise ratio information and maximum Doppler shift information, and the determining means determines the current dynamic USTP value according to the following formula:

$USTP=(1+\mathrm{\κ})n_d^{opt};$

wherein κ is a number of pilot symbols per data symbol determined by a control system of the base station,determined according to the following formula:wherein: $A=\sqrt[3]{\sqrt{\frac{1}{2^6{\left({\mathrm{\πF}}_d{T}_s\right)}^4{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^2}-\frac{125}{6192{\left({\mathrm{\πF}}_d{T}_s\right)}^2{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^4}}-\frac{125}{1728{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^3}+\frac{1}{2^3{\left({\mathrm{\πF}}_d{T}_s\right)}^2{\mathrm{\γ}}_p\mathrm{\κ}}},$ wherein, F is_dAs maximum Doppler shift information, gamma_pIs pilot signal-to-noise ratio information;

transmitting means for transmitting the determined dynamic USTP value to the mobile station.

2. A period adjustment apparatus for adjusting a period of a transmission channel sounding signal SRS according to a dynamic uplink sounding time domain period, USTP, value, wherein the period adjustment apparatus is included in a mobile station, wherein the adjustment apparatus comprises:

a receiving device for receiving a dynamic USTP value, wherein the dynamic USTP value is from a base station corresponding to the mobile station; wherein the dynamic USTP value is determined according to the following formula:

$USTP=(1+\mathrm{\κ})n_d^{opt};$

wherein κ is a number of pilot symbols per data symbol determined by a control system of the base station,determined according to the following formula:wherein:

$A=\sqrt[3]{\sqrt{\frac{1}{2^6{\left({\mathrm{\πF}}_d{T}_s\right)}^4{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^2}-\frac{125}{6192{\left({\mathrm{\πF}}_d{T}_s\right)}^2{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^4}}-\frac{125}{1728{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^3}+\frac{1}{2^3{\left({\mathrm{\πF}}_d{T}_s\right)}^2{\mathrm{\γ}}_p\mathrm{\κ}}}$ wherein Fd is maximum Doppler shift information, gamma_pIs pilot signal-to-noise ratio information;

and an adjusting device for adjusting the period of SRS transmission of the mobile station according to the dynamic USTP.

3. A communication system comprising a base station and a mobile station corresponding to the base station, wherein the base station comprises the dynamic determination apparatus according to claim 1, and the mobile station comprises the period adjustment apparatus according to claim 2.

4. A communication system according to claim 3, the communication system being a multiple-input single-output system.

5. A method for dynamically determining a USTP value of an uplink connection sounding time domain period in a dynamic determination device of a base station, wherein the method comprises the following steps:

a, acquiring channel environment information of a mobile station corresponding to the base station;

b, determining a current dynamic USTP value according to the channel environment information, wherein the channel environment information comprises pilot signal-to-noise ratio information and maximum Doppler shift information, and the current dynamic USTP value is determined according to the following formula in the step b:

$USTP=(1+\mathrm{\κ})n_d^{opt};$

wherein κ is a number of pilot symbols per data symbol determined by a control system of the base station,determined according to the following formula:wherein:

$A=\sqrt[3]{\sqrt{\frac{1}{2^6{\left({\mathrm{\πF}}_d{T}_s\right)}^4{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^2}-\frac{125}{6192{\left({\mathrm{\πF}}_d{T}_s\right)}^2{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^4}}-\frac{125}{1728{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^3}+\frac{1}{2^3{\left({\mathrm{\πF}}_d{T}_s\right)}^2{\mathrm{\γ}}_p\mathrm{\κ}}},$ wherein, F is_dAs maximum Doppler shift information, gamma_pIs pilot signal-to-noise ratio information;

c, transmitting the dynamic USTP value to the mobile station so that the mobile station can adjust the period of transmitting a channel sounding signal (SRS) by the mobile station according to the dynamic USTP.

6. A method for adjusting the period of transmitting a channel sounding signal (SRS) according to a dynamic uplink connection sounding time domain period (USTP) value in a period adjusting device of a mobile station, wherein the method comprises the following steps:

-receiving the dynamic USTP value, wherein the dynamic USTP value is from a base station corresponding to the mobile station; wherein the dynamic USTP value is determined according to the following formula:

$USTP=(1+\mathrm{\κ})n_d^{opt};$

wherein κ is a number of pilot symbols per data symbol determined by a control system of the base station,determined according to the following formula:wherein:

$A=\sqrt[3]{\sqrt{\frac{1}{2^6{\left({\mathrm{\πF}}_d{T}_s\right)}^4{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^2}-\frac{125}{6192{\left({\mathrm{\πF}}_d{T}_s\right)}^2{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^4}}-\frac{125}{1728{\left({\mathrm{\γ}}_p\mathrm{\κ}\right)}^3}+\frac{1}{2^3{\left({\mathrm{\πF}}_d{T}_s\right)}^2{\mathrm{\γ}}_p\mathrm{\κ}}}$ wherein, F is_dAs maximum Doppler shift information, gamma_pIs pilot signal-to-noise ratio information;

-adjusting the periodicity of the mobile station transmission of SRS according to the dynamic uspp value.