WO2011157030A1

WO2011157030A1 - Method and apparatus for automatically adjusting time slot allocation ratio of uplink and downlink in cell

Info

Publication number: WO2011157030A1
Application number: PCT/CN2010/079049
Authority: WO
Inventors: 张现周; 张文英; 陈晔; 李建辉
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-17
Filing date: 2010-11-24
Publication date: 2011-12-22
Also published as: CN102291775A

Abstract

A method and an apparatus for automatically adjusting time slot allocation ratio of uplink and downlink in a cell are disclosed. The method involves collecting uplink and downlink traffic in the cell, computing the traffic ratio of uplink and downlink in each period of time in a predetermined cycle based on the uplink and downlink traffic, determining the matched time slot allocation ratio of uplink and downlink based on the traffic ratio of uplink and downlink, recording the period of time and the corresponding time slot allocation ratio of uplink and downlink, and adjusting the time slot allocation ratio of uplink and downlink in each period of time according to the corresponding relationship between the period of time and the time slot allocation ratio of uplink and downlink. Such solutions can reduce the complexity of device maintenance and realize optimal match between the time slot allocation ratio of uplink and downlink and the traffic of uplink and downlink, thereby enable the better user experience.

Description

Method and device for automatically adjusting uplink and downlink time slot ratio of cell

The present invention relates to the field of wireless communications, and in particular, to a method and apparatus for automatically adjusting the ratio of uplink and downlink time slots of a cell. Background technique

Communication systems using Time Division Duplex (TDD) mode, such as Time Division Synchronous Code Division Multiple Access (TDSCDMA) and Long Term Evolution (LTE) systems, due to their up and down The line slot ratio is adjustable and is widely used. In a city, different areas, different time periods, different user habits, and different user softwares will cause different areas and different time periods, and the traffic of the uplink and downlink of the cell is different. Therefore, the cells in the TDD mode should be different according to different time periods. The crowds are configured with different uplink and downlink time slot ratios to obtain different uplink and downlink traffic according to different situations, thereby meeting the needs of operators, increasing operators' operating revenue, and improving user satisfaction.

The physical channel of the TDSCDMA system uses a three-layer structure: time slot, radio frame and system frame number, and a 10 ms radio frame consists of two 5 ms sub-frames. As shown in FIG. 1 , each subframe includes seven uplink and downlink time slots, each time slot is 864 chips long, time slot 0 is fixed as a downlink time slot, time slot 1 is fixed as an uplink time slot, and other time slots can be fixed according to Actually, configuration is required, and the uplink and downlink time slots are separated by time slot switching points. The uplink and downlink time slots can be configured in symmetric mode and asymmetric mode as needed.

As shown in Figure 2, the STA frame of the LTD system is 10 ms long and consists of two 5 ms half frames. Each field consists of five 1 ms subframes, including the uplink subframe U, the downlink subframe D, and the special frame. Sub-frame S, the specific configuration is shown in Table 1, where 0, 1, 2, 6 are 5ms subframe configuration, and 3, 4, 5 It is a 10ms subframe configuration. The special subframe includes a guard interval (GP, Guard Period), an uplink pilot time slot (UpPTS, Uplink Pilot Time Slot), and a downlink pilot time slot (DwPTS, Downlink Pilot Time Slot). The subframes 0 and 5 and the DwPTS are always used for downlink transmission, and the subframes after the UpPTS and the special subframe S are always used for uplink data transmission.

Table 1 LTE radio frame subframe configuration

The wireless frame of the LTD system can be configured with a 5ms subframe configuration and a 10ms subframe configuration. The uplink and downlink configurations are divided into 5ms uplink and downlink conversion period and 10ms uplink and downlink conversion period according to the period of the uplink and downlink transition points of the special subframe. The two subframes of the 5ms uplink and downlink conversion period have special subframes; and the 10ms uplink and downlink conversion The period special subframe has only the first field.

It can be seen that the wireless parameters that need to be configured in the system are many and very complicated, which brings a lot of work for network optimization. However, the existing configuration method is usually manually configured, and the workload is large and difficult, and it is difficult to achieve an optimal match between the uplink and downlink time slot ratio and the uplink and downlink traffic. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and a device for automatically adjusting the uplink and downlink time slot ratio of a cell, which can reduce the complexity of device parameter configuration, and achieve optimal matching between uplink and downlink time slot ratio and uplink and downlink traffic. , thereby increasing the operator's revenue and improving the user experience. In order to solve the above technical problem, the present invention provides a method for automatically adjusting the uplink and downlink time slot ratio of a cell, which includes the following steps:

Collect uplink and downlink traffic of the cell;

Calculating an uplink-downlink traffic ratio of each time period in a predetermined period according to the uplink and downlink traffic; determining a matched uplink-downlink slot ratio according to the uplink-downlink traffic ratio, and corresponding to a recording period and a corresponding uplink and downlink time slot ratio;

The uplink and downlink time slot ratios of each time period are adjusted according to the correspondence between the time period and the uplink and downlink time slot ratios.

Preferably, the method for automatically adjusting the uplink and downlink time slot ratio of the cell further includes: an adaptation table for pre-configuring the ratio of the uplink and downlink traffic to the uplink and downlink time slot, wherein determining the matching uplink and downlink according to the uplink and downlink traffic ratio The time slot ratio is specifically: searching an adaptation table matching the uplink and downlink traffic and the uplink and downlink time slots to find an uplink and downlink time slot ratio matching the uplink and downlink traffic ratio.

Preferably, the method for automatically adjusting the uplink and downlink time slot ratio of the cell further includes pre-configuring a cycle length and a time period length of the uplink and downlink time slot ratio adjustment.

Preferably, the method for automatically adjusting the uplink and downlink time slot ratio of the cell further includes pre-configuring an initial value of the uplink and downlink time slot ratio of the cell.

The present invention further provides an apparatus for automatically adjusting a ratio of uplink and downlink time slots of a cell, where the apparatus includes: a traffic collection module, a traffic processing decision module, and a time slot ratio adjustment module;

a traffic collection module, configured to collect uplink and downlink traffic of the cell;

a traffic processing decision module, configured to calculate an uplink-downlink traffic ratio of each time period in a predetermined period according to the uplink and downlink traffic collected by the traffic collection module, and determine a matching uplink and downlink time slot ratio according to the uplink and downlink traffic ratio, and corresponding The recorded time period and the corresponding uplink and downlink time slot ratio;

The time slot ratio adjustment module is configured to adjust the uplink and downlink time slot ratios of each time period according to the correspondence between the time period recorded by the traffic processing decision module and the uplink and downlink time slot ratio.

Preferably, the traffic decision processing module is specifically configured to search for the uplink and downlink traffic Gap ratio.

Preferably, the apparatus further includes a configuration module, configured to pre-configure a period length and a period length of the uplink and downlink slot ratio adjustment.

Preferably, the time slot ratio adjustment module is further configured to pre-configure an initial value of the uplink and downlink time slot ratio of the cell.

Compared with the prior art, the method and device for automatically adjusting the uplink and downlink time slot ratio of the cell of the present invention correlate the uplink and downlink traffic with the uplink and downlink time slot ratio by counting the uplink and downlink traffic of the cell, and automatically adjust according to the corresponding relationship. The uplink and downlink time slot ratios reduce the complexity of device maintenance, and achieve optimal matching of uplink and downlink time slot ratios and uplink and downlink traffic, thereby increasing operator revenue and improving user experience. DRAWINGS

1 is a radio frame structure diagram of a TDSCDMA system;

2 is a radio frame structure diagram of an LTE system;

3 is a flow chart of an embodiment of a method for automatically adjusting a ratio of uplink and downlink time slots of a cell according to the present invention;

4 is a flow chart of another embodiment of a method for automatically adjusting a ratio of uplink and downlink time slots of a cell according to the present invention;

5 is a schematic structural diagram of an embodiment of an apparatus for automatically adjusting a ratio of uplink and downlink time slots of a cell according to the present invention;

6 is a schematic diagram of a network structure of a TDSCDMA system;

FIG. 7 is a schematic diagram of a network structure of an LTE system. detailed description

Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals Components. As described above, the present invention provides a method and apparatus for automatically adjusting the uplink and downlink time slot ratios of a cell, which can reduce the complexity of device parameter configuration, and achieve optimal matching of uplink and downlink time slot ratios and uplink and downlink traffic. Thereby increasing the operator's revenue and improving the user experience.

The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 3 is a flowchart of an embodiment of a method for automatically adjusting a ratio of uplink and downlink time slots of a cell according to the present invention. As shown in FIG. 3, the method in this embodiment includes the following steps:

Step S301: Collect uplink and downlink traffic of the cell.

Step S302: Calculate an uplink-downlink traffic ratio of each time period in a predetermined period according to the uplink and downlink traffic;

Step S303: Determine a matched uplink-downlink slot ratio according to the uplink-downlink traffic ratio, and corresponding a recording period and a corresponding uplink-downlink slot ratio.

Step S304: Adjust the ratio of the upper and lower time slots of each time period according to the correspondence between the time period and the ratio of the uplink and downlink time slots.

In the method of the embodiment, the uplink and downlink traffic is correlated with the uplink and downlink time slot ratios according to the statistics, and the uplink and downlink time slot ratios are automatically adjusted according to the corresponding relationship, thereby reducing the complexity of the device maintenance and achieving the upper and lower The line slot ratio is optimally matched with the uplink and downlink traffic, which increases the operator's revenue and improves the user experience.

4 is a flow chart of another embodiment of a method for automatically adjusting a ratio of uplink and downlink time slots of a cell according to the present invention. As shown in the figure, the method in this embodiment includes:

Step S401: Pre-configure the period length and the period length of the uplink and downlink slot ratio adjustment.

Specifically, the period length may be one week or one day, and the period length may be a period of any length of one period. According to the actual situation of the cell, the period length and the time length of the uplink and downlink time slot ratio adjustment are configured, that is, the interval between the uplink and downlink time slot ratios is modified, and the matching uplink and downlink traffic of the cell and the uplink and downlink time slot ratio of the cell can be further optimized. The step may further include pre-configuring an initial value of the uplink and downlink time slot ratio of the cell. Step S402: Collect uplink and downlink traffic of the cell.

Step S403: Calculate an uplink-downlink traffic ratio of each time period in a predetermined period according to the uplink and downlink traffic.

Step S404: Determine a matched uplink-downlink slot ratio according to the uplink-downlink traffic ratio, and corresponding a recording period and a corresponding uplink-downlink slot ratio.

Specifically, the matching of the uplink and downlink time slots matched with the uplink and downlink traffic ratios may be determined by using an adaptation table matching the uplink and downlink traffic with the uplink and downlink time slots to determine the matching uplink and downlink time slots. When the matching ratio of the uplink and downlink time slots is different from the determined uplink and downlink time slot ratio of the corresponding recorded time period, the new uplink and downlink time slot matching ratio is used to replace the previous uplink and downlink time slot matching. ratio.

For the TDSCDMA system, the adaptation table of the uplink and downlink traffic and the uplink and downlink time slot ratio is:

The first row represents the time period, and the second row represents the uplink and downlink traffic corresponding to the time zone and the uplink and downlink time slot ratio.

For the TDD mode LTE system, the adaptation table of the uplink and downlink traffic and the uplink and downlink time slot ratio is:

Step S405: Adjust the ratio of the upper and lower time slots of each time period according to the correspondence between the time period and the ratio of the uplink and downlink time slots.

In the method of the embodiment, the uplink and downlink traffic is correlated with the uplink and downlink time slot ratios according to the statistics, and the uplink and downlink time slot ratios are automatically adjusted according to the corresponding relationship, thereby reducing the complexity of the device maintenance and achieving the upper and lower The line slot ratio is optimally matched with the uplink and downlink traffic, which increases the operator's revenue and improves the user experience. FIG. 5 is a schematic structural diagram of an apparatus for automatically adjusting a ratio of uplink and downlink time slots of a cell according to the present invention. As shown in FIG. 5, the apparatus 500 of this embodiment includes a traffic collection module 501, a traffic processing decision module 502, and a slot ratio adjustment module 503.

The traffic collection module 501 is configured to collect the uplink and downlink traffic of the cell, and the traffic collection module 501 starts the uplink and downlink traffic collection of the cell, and periodically uploads the uplink and downlink traffic. The traffic processing decision module 502 is configured to calculate an uplink-downlink traffic ratio of each period in a predetermined period according to the uplink and downlink traffic collected by the traffic collection module 501, and determine a matched uplink-downlink slot ratio according to the uplink-downlink traffic ratio, Corresponding to the recording period and the corresponding uplink and downlink time slot ratio; the time slot ratio adjustment module 503 is configured to adjust the time period according to the correspondence between the time period recorded by the traffic processing decision module 502 and the uplink and downlink time slot ratio Up and down time slot ratio. The time slot ratio adjustment module 503 can also be used to pre-configure an initial value of the uplink and downlink time slot ratio of the cell. Preferably, the apparatus in this embodiment may further include a configuration module (not shown) for pre-configuring the period length and the period length of the uplink and downlink slot ratio adjustment.

The apparatus for automatically adjusting the uplink and downlink time slot ratio of the cell in this embodiment can be applied to a time division duplex communication system such as TDSCDMA and LTE.

Specifically, as shown in FIG. 6, the TDS CDMA system includes a Radio Network Controller (RNC), a Node B (NodeB), and a corresponding Network Management Node B Operation and Maintenance Center (OMCB). Interoperate with the RNC and the RNC through the Iub interface. The RNCs are interconnected through the Iur interface. The RNC and the core network are interconnected by the Iu interface. The OMCB is responsible for the operation and maintenance of the NodeB, and the OMCR is responsible for the operation and maintenance of the RNC. In the TDS CDMA system, the traffic collection module 501 and the slot ratio adjustment module 503 and the configuration module may be implemented in an RNC, and the traffic processing decision module 502 may be implemented in an OMC, which is a controlled mode of TDSCDMA. . Optionally, the foregoing modules may be all implemented in an RNC, which is a non-TDSCDMA Controlled mode.

As shown in FIG. 7, the LTE system includes an enhanced Node B (eNodeB, enhanced Node B), an OMC (Operation & Maintenance Center), a Mobility Management Entity (MME), and a serving gateway ( SGW, Serving GateWay) The four network elements, the eNodeBs are interconnected through the X2 interface, and the eNodeB and the MME are interconnected through the S1-MME interface, and the eNodeB and the SGW are interconnected through the SI-U interface. In the LTE system, the traffic collection module 501 and the slot ratio adjustment module 503 and the configuration module may be implemented in an eNodeB, and the traffic processing decision module 502 may be implemented in an OMC, which is an LTE system. Controlled mode. Optionally, the foregoing modules may all be implemented in an eNodeB, which is an uncontrolled mode under the LTE system.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Claims

Claim

A method for automatically adjusting a ratio of uplink and downlink time slots of a cell, wherein the method includes:

Collect uplink and downlink traffic of the cell;

The method according to claim 1, wherein the method further comprises: pre-configuring an adaptation table of the uplink and downlink traffic and the uplink and downlink time slot ratio, wherein the determining is matched according to the uplink and downlink traffic ratio The uplink and downlink time slot ratios are as follows: The uplink and downlink time slot ratios matched with the uplink and downlink traffic ratios are searched from the adaptation table of the uplink and downlink traffic and the uplink and downlink time slots.

The method according to claim 2, wherein the method further comprises pre-configuring a period length and a period length of the uplink and downlink slot ratio adjustment.

The method according to any one of claims 1 to 3, characterized in that the method further comprises an initial value of a pre-configured cell uplink and downlink time slot ratio.

The device for automatically adjusting the uplink and downlink time slot ratio of the cell, wherein the device comprises: a traffic collection module, a traffic processing decision module, and a time slot ratio adjustment module;

a traffic processing decision module, configured to calculate an uplink-downlink traffic ratio of each time period in a predetermined period according to the uplink and downlink traffic collected by the traffic collection module, and determine a matching uplink and downlink time slot ratio according to the uplink and downlink traffic ratio, and corresponding Recording period and corresponding uplink and downlink time slot ratio;

The device according to claim 5, wherein the traffic decision processing module is specifically configured to determine the uplink and downlink by searching an adaptation table of the uplink and downlink traffic and the uplink and downlink time slot ratio The traffic ratio is matched to the matched uplink and downlink time slots.

The device according to claim 6, wherein the device further comprises a configuration module, configured to pre-configure a period length and a period length of the uplink and downlink slot ratio adjustment.

The device according to any one of claims 5 to 7, wherein the time slot ratio adjustment module is further configured to pre-configure an initial value of the uplink and downlink time slot ratio of the cell.