WO2013134981A1

WO2013134981A1 - Method and mobile terminal for selecting access channel

Info

Publication number: WO2013134981A1
Application number: PCT/CN2012/073857
Authority: WO
Inventors: 高明刚; 孙红利
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-03-14
Filing date: 2012-04-12
Publication date: 2013-09-19
Also published as: CN103313345A

Abstract

A method and a mobile terminal for selecting access channel are provided. The method comprises that the mobile terminal measures interfering energy of each accessible channel and the mobile terminal selects the accessible channel with minimum interfering energy as the actual access channel. The technical solution considers the interfering energy of the channel as a condition in which the mobile terminal accesses the channel, so as to reduce the interference of the terminal accessing the channel.

Description

Method for selecting access channel and mobile terminal

Technical field

The present invention relates to the field of mobile communications, and in particular, to a method and a mobile terminal for selecting an access channel.

Background technique

With the development of mobile communication technology and the rise of 4G technology, data services have become the main business of major operators. As a result, traditional fixed Internet data services are being infiltrated by mobile product services. Although the traditional fixed wireless WIFI router realizes user data sharing and network service within a certain coverage, it has been difficult to meet the user's mobility requirements.

As a result, MIFI and Eufi products with wireless network data capabilities and WIFI access capabilities are becoming more and more popular. The good mobility of these products can meet the needs of high-speed Internet access and multi-user simultaneous Internet access whenever and wherever. However, due to the uncertainty of the environment, if such products are unable to adaptively detect the surrounding wireless environment, it is very likely to access a crowded or heavily interfered wireless channel, thus failing to bring expected network data services to users. .

For example, the ISM 2.4G frequency band for WIFI work is a common working frequency band for many small electronic devices. As the number of frequency bands of the LTE network increases, there are already many LTE network signals adjacent to the 2.4G frequency band, if the WIFI product is accessed. The channel selection of the point (AP) is improper, and it is easy to cause LTE and WIFI to interfere with each other, resulting in a decrease in WIFI performance.

In addition to the LTE network signal will cause interference to the WIFI signal, WIFI signals are also likely to cause interference. By convention, many WIFI products will default to channel 1, 6 or 11 as their default channel. Generally, non-professional users may not change the channel to the uncongested channel at all, and it is difficult for the user to understand the current congestion status of each channel. In this way, with the increase of MIFI and Eufi products, the default channels of the manufacturers will be more crowded, and the performance of MIFI and Eufi products will also be worse. Some channels that are relatively idle are not used by anyone. This is not only a waste of resources, but also a better use effect for users. How to make mobile WIFI products automatically select better channels to make products more intelligent according to the current environment. This problem has become more and more important with the popularity of mobile WIFI products.

Summary of the invention

The present invention provides a method of selecting an access channel and a mobile terminal to reduce the access of the mobile terminal to the channel.

In order to solve the above technical problems, the present invention uses the following technical solutions:

A method for selecting an access channel, the method comprising:

The mobile terminal measures the interference energy of each accessible channel;

The mobile terminal selects an accessible channel with the smallest interference energy as the actual access channel.

Optionally, the method further includes:

When the interference energy of the actual access channel increases, the mobile terminal determines whether the actual access channel satisfies the re-measurement condition for a preset period of time, and if the re-measurement condition is always met, re-measure each The interference energy of the channel can be accessed, and the accessible channel with the smallest interference energy is reselected as the actual access channel.

Optionally, the re-measurement condition includes: the modulation order of the actual access channel is less than a minimum allowed modulation order, and the rate decoding error rate of the actual access channel is greater than a maximum allowed rate decoding error rate.

Optionally, the mobile terminal is a WIFI terminal.

A mobile terminal selecting an access channel, the mobile terminal comprising an access channel measurement module and an access channel selection module, wherein:

The access channel measurement module is configured to: measure interference energy of each accessible channel, and send the measurement result to the access channel selection module;

The access channel selection module is configured to: select an accessible channel with the smallest interference energy as the actual access channel.

Optionally, the mobile terminal further includes a re-measurement determining module, where:

The re-measurement determining module is configured to: when it is known that the interference energy of the actual access channel increases, Determining whether the actual access channel satisfies the re-measurement condition for a preset period of time. If the re-measurement condition is met, triggering the access channel measurement module to re-measure the interference energy of each accessible channel. The access channel selection module reselects the accessible channel with the smallest interference energy as the actual access channel;

The access channel measurement module is further configured to: detect whether the interference energy of the actual access channel is increased, and notify the re-measurement determination module when the interference energy of the actual access channel increases.

In the above technical solution, when the mobile terminal selects the access channel, the interference energy of the channel is taken into consideration, and the WIFI product can be prevented from using the default channel as the access channel, and the number of WIFI products increases, causing the default channel to be crowded, and thus Access to WIFI products has a big problem of interference. BRIEF abstract

1 is a flowchart of an access channel selection method according to an embodiment of the present invention;

2 is a flowchart of an access channel selection method according to an application example of the present application;

FIG. 3 is a structural block diagram of a mobile terminal that selects an access channel according to the embodiment.

Preferred embodiment of the invention

In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be arbitrarily combined with each other. These combinations are all within the scope of the invention.

FIG. 1 is a flowchart of a method for selecting an access channel according to an embodiment.

S101. The mobile terminal measures interference energy of each accessible channel. S102. The mobile terminal selects an accessible channel with the smallest interference energy as the actual access channel. When the interference energy of the actual access channel increases, the mobile terminal determines whether the actual access channel has been satisfied for a preset period of time. Re-measurement condition, if the re-measurement condition is always met, re-measure the interference energy of each accessible channel, and re-select the accessible channel with the smallest interference energy as the actual access channel;

The re-measurement condition includes that the modulation order of the actual access channel is less than the lowest allowed modulation order, and the rate decoding error rate of the actual access channel is greater than the highest allowed rate decoding error rate.

The above embodiment will be further described in detail below with a specific application example.

FIG. 2 is a flowchart of an access channel selection method according to an application example.

5201, the mobile terminal is powered on;

5202. The mobile terminal measures interference energy of each accessible channel.

The mobile terminal can measure the interference energy of each accessible channel from the lowest channel (such as cm); at the beginning of measuring the interference energy of each accessible channel, each access can be ensured to ensure the accuracy of the measurement. The signal of the channel passes through a band pass filter to measure the signal of the bandpass-filtered accessible channel;

The signal sampling frequency and the sampling time can be set, and the signals of each accessible channel are sampled and stored, and the energy obtained by the sampled signals is analyzed to obtain the interference energy of each accessible channel. This part can be implemented by existing digital signal processing technology and will not be described here.

S203. The mobile terminal selects an accessible channel with the smallest interference energy as the actual access channel. After determining the actual access channel, the mobile terminal can start its normal service.

S204. The mobile terminal measures an increase in interference energy of the current actual access channel.

The situation that the interference energy of the current actual access channel of the mobile terminal increases may be changed for the WIFI hotspot distribution where the mobile terminal is located;

S205. The mobile terminal determines whether the current rate decoding error rate (BLER) is high (eg,

BLER reaches 5%), if higher, step S206 is performed;

If the mobile terminal determines that the current BLER has not reached a high level, it can continue its normal Business

S206. The mobile terminal reduces the modulation order.

The mobile terminal can reduce the modulation order according to its own channel adaptive algorithm;

S207, the mobile terminal determines whether the reduced modulation order is lower than the minimum allowable modulation order Qthresh; if it is lower, step S208 is performed; if not lower, step S205 is performed;

In other embodiments, a timer may be started after step S206. In step S207, if the mobile terminal determines that the reduced modulation order is not lower than the minimum allowable modulation order Qthresh, it continues to determine whether the timer is up. If the timer does not expire, the mobile terminal continues its normal service; if the timer expires, the mobile terminal performs step S205 again; this embodiment can prevent the mobile terminal from frequently reading the current rate decoding error rate. (BLER), lowering the modulation order, and reading the reduced modulation order adversely affects normal traffic.

The minimum allowable modulation order Qthresh can be 2, 4 or 6; usually, as the modulation order decreases, the BLER also decreases;

S208, the mobile terminal determines whether the current rate decoding error rate (BLER) is greater than the highest allowed rate decoding error rate Err _max , if greater, step S209;

The maximum allowable rate decoding error rate Err _max can be set to 10%;

S209 The mobile terminal starts a timer, and sets a timing duration threshold T _thresh ;

S210, the mobile terminal determines whether the current rate decoding error rate is always greater than Err _max before the timing time reaches T _thresh , and the reduced modulation order is always lower than Q _thresh , if yes, step S211 is performed;

If the current rate decoding error rate is always greater than the highest allowed rate decoding error rate Err _max in the duration of T _thresh and the reduced modulation order is always lower than Q _thresh , indicating that the current actual access channel is in a short period of time It is impossible to get better. At this time, the mobile terminal performs step S211 to avoid the "ping-pong effect of channel switching";

S211: The mobile terminal re-measures the interference energy of each currently accessible channel;

S212 The mobile terminal reselects the accessible channel with the smallest interference energy as the actual access channel. FIG. 3 is a structural block diagram of a mobile terminal that selects an access channel according to the embodiment.

The mobile terminal can include an access channel measurement module 31 and an access channel selection module 32, wherein

The access channel measurement module 31 is configured to: measure interference energy of each accessible channel, and send the measurement result to the access channel selection module;

The access channel selection module 32 is arranged to select an accessible channel with the least interference energy as the actual access channel.

In addition to the above module, the mobile terminal may further include a re-measurement determining module 33, and the re-measurement determining module 33 is configured to: when it is learned that the interference energy of the actual access channel is increased, determine that the actual access channel is preset Whether the re-measurement condition is always satisfied in the time period, if the re-measurement condition is always met, the access channel measurement module is triggered to re-measure the interference energy of each accessible channel, and the access channel with the smallest interference energy is reselected as the actual Access channel

The re-measurement condition includes: a modulation order of the actual access channel is less than a minimum allowed modulation order, and a rate decoding error rate of the actual access channel is greater than a maximum allowed rate decoding error rate;

The access channel measurement module 32 is further configured to: detect whether the interference energy of the actual access channel is increased, and notify the re-measurement determining module 33 when the interference energy of the actual access channel increases.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using one or more integrated circuits. Accordingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may use software functions. The form of the module is implemented. The invention is not limited to any specific form of combination of hardware and software.

It should be noted that the present invention may be embodied in various other embodiments without departing from the spirit and scope of the invention. Wai.

Industrial applicability

In the above technical solution, when the mobile terminal selects the access channel, the interference energy of the channel is taken into consideration, and the WIFI product can be prevented from using the default channel as the access channel, and the number of WIFI products increases, causing the default channel to be crowded, and thus The WIFI product that is accessed has a large interference problem, and therefore the present invention has strong industrial applicability.

Claims

Claim

A method for selecting an access channel, the method comprising:

2. The method of claim 1 further comprising:

3. The method according to claim 2, wherein the re-measurement condition comprises: a modulation order of the actual access channel is less than a minimum allowed modulation order, and a rate decoding error rate of the actual access channel is greater than The maximum allowed rate decoding error rate.

4. The method according to any one of claims 1 to 3, wherein

The mobile terminal is a WIFI terminal.

5. A mobile terminal that selects an access channel, the mobile terminal comprising an access channel measurement module and an access channel selection module, wherein:

6. The mobile terminal of claim 5, the mobile terminal further comprising a remeasurement determination module, wherein:

The re-measurement determining module is configured to: when it is learned that the interference energy of the actual access channel is increased, determine whether the actual access channel satisfies the re-measurement condition for a preset period of time, if the re-measurement condition is always met And triggering, by the access channel measurement module, to re-measure the interference energy of each accessible channel, where the access channel selection module reselects the accessible channel with the smallest interference energy as the actual access channel; The access channel measurement module is further configured to: detect whether the interference energy of the actual access channel is increased, and notify the re-measurement determining module when the interference energy of the actual access channel increases.

The mobile terminal according to claim 6, wherein the re-measurement condition comprises: a modulation order of the actual access channel is less than a minimum allowed modulation order, and a rate decoding error rate of the actual access channel Greater than the maximum allowed rate decoding error rate.