CN100464516C - A method for adaptive network selection - Google Patents
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Abstract
一种自适应选择网络的方法，首先根据终端设备获取所有可适应的网络；然后判定该网络是否可以启动自适应，从而将可启动自适应的网络按照所设置的自适应网络方式的优先顺序进行记录；接着启动自适应，则终端设备将通过所记录的优先顺序，将选择的最优先无线网络同当前使用的网络类型进行比较，如果相同，则不进行切换，否则切换到最优先的无线网络；重复上述步骤直至找到最佳或需要的网络环境。
A method for adaptively selecting a network. Firstly, all adaptable networks are acquired according to the terminal equipment; Record; then start self-adaptation, the terminal device will compare the selected wireless network with the highest priority with the currently used network type through the recorded priority order, if they are the same, it will not switch, otherwise it will switch to the highest priority wireless network ; Repeat the above steps until you find the best or desired network environment.
Description
Technical field
The invention belongs to the communications field, refer to a kind of implementation method of wireless terminal device self-adapting selection network especially.
Background technology
Past, the radio digital communication system network is widely used to have only GSM, thereby there is not a network-adaptive problem of terminal equipment, but radio digital communication system is of a great variety at present, comprise GSM, GPRS, CDMA, WLAN etc., (GSM is up to 57.6Kbps to different network data transmission speed differences, GPRS is up to 115Kbps, the transmission rate of 802.11b agreement support reaches 11Mbps among the WLAN, 802.11a the transmission rate of agreement support reaches 54Mbps), and expense variance is bigger, so the with good grounds message transmission rate of user, expense, network condition such as network signal quality are selected the demand of wireless network.
The user needs the wireless network that the artificial selection terminal equipment uses usually at present, and in case after selected, terminal equipment can not be according to the variation (do not have network signal or the higher wireless network of transmission rate is arranged as selected wireless network) of wireless network environment, and user's demand (is wished the network that uses transmission rate high as the user, or wish the network that cost of use is low) reselect wireless network automatically, and must manually finish the work of selecting network by the user, as shown in Figure 1: execution in step is selected a certain wireless network; Execution in step 11 judges whether this network is available; If available, then execution in step 12 is used current network; If unavailable, then need to change terminal equipment, repeated execution of steps 10 is selected wireless network again, until available.Like this, operate very inconvenient.
Summary of the invention
The present invention mainly solves in the wireless communication system, and terminal equipment adapts to the best/needs network environment of selection automatically according to user's demand.
For addressing the above problem, the method for self-adapting selection network of the present invention comprises the steps:
1) determine the wireless device type that terminal equipment uses, described wireless device type is one or more;
2) described terminal equipment determines to adapt to which network type according to the wireless device type that obtains in the step 1);
3) described terminal equipment is according to step 2) in resulting network type, corresponding network is carried out real time scan, obtain the signal characteristic data that all can adapt to wireless network;
4) described terminal equipment compares the wireless network signal characteristic that obtains in the step 3) with predefined performance index, judge whether this network can start self adaptation, carry out record according to the priority of set adaptive network mode thereby can start adaptive network;
5) start self adaptation, then terminal equipment will pass through the priority that write down, and the override wireless network the selected network type with current use is compared, if identical, then not switch, otherwise automatically switch to prepreerence wireless network;
6), then finish if do not start self adaptation.
The invention has the advantages that:
(1) accurately determines the wireless network type that terminal equipment can adapt to;
(2) can obtain the signal strength signal intensity of wireless network in real time;
(3) terminal equipment adapts to the wireless network situation of change automatically.
Description of drawings
Fig. 1 is a mode of using wireless network for existing terminal equipment.
Fig. 2 is the basic flow sheet of terminal equipment adaptive network implementation method.
Fig. 3 is for adapting to the flow chart of wireless network by transmission rate height order.
Embodiment
In order to make can the self adaptation current wireless network of terminal equipment and to meet consumers' demand, the present invention allows to be provided with multiple adaptive network mode, and the user can select.
The adaptive network mode that the user selects will in the present invention, be provided with in modes such as tabulation or databases as the basis for estimation of determining current optimum wireless network.And the present invention can be solidified multiple adaptive network mode in advance and be selected for the user, also can allow user oneself that the adaptive network mode is set.
The adaptive network mode can be but be not limited to following several:
(1) adapts to the high priority wireless network; (be applicable to from low priority area of wireless network coverage territory and move to high priority area of wireless network coverage territory)
(2) adapt to the low priority wireless network; (be applicable to from high priority area of wireless network coverage territory and move to low priority area of wireless network coverage territory)
(3) only when the wireless network signal of current use does not exist, adapt to other wireless networks;
(4) according to priority order adapts to other wireless networks;
(5) any other wireless network of incompatibility.
The user can define the priority level of wireless network as required voluntarily, for example: expense, transmission rate, expense/transmission rate etc.
When expense is preferential, need compare by local networks service supplier's expenses standard; When transmission rate is preferential, need the relatively transmission rate of each wireless network.
Please refer to shown in Figure 2ly, realize that the method for terminal equipment adaptive network may further comprise the steps:
1) execution in step 20, determine the wireless device type that terminal equipment uses, as: mobile phone, PDA, notebook computer and corresponding network formats;
2) execution in step 21, determine to adapt to which network type according to the wireless device type that obtains in the step 20, as: GSM, GPRS, CDMA, WLAN;
3) execution in step 22, according to resulting network type in the step 21, according to the priority of the adaptive network mode that sets in advance, corresponding network is carried out real time scan, the signal characteristic data of obtaining all adaptable wireless networks are as intensity, frequency etc.; Really, also can other scan in proper order, for example random scan;
4) execution in step 23, the wireless network signal characteristic that obtains in the step 22 is compared with predefined performance index, judge whether this network can start self adaptation, carry out record according to the priority of set adaptive network mode thereby can start adaptive network.For example, with the signal strength signal intensity is example, the wireless network signal strength that obtains compares with predefined access threshold value, when signal strength signal intensity when inserting threshold value, then this network is listed in and can be started adaptive network list, thereby carries out record according to set network priority in the mode of tabulation or database; Otherwise this network can not start self adaptation;
5) if start adaptive process, then execution in step 24, and terminal equipment will pass through the network priority sequence table set up, the override wireless network the selected network type with current use is compared, if identical, then do not switch, otherwise switch to the override wireless network;
6) if successfully insert the override wireless network of selecting, then interrupt the legacy network connection and preserve the network type of current use, otherwise switch to suboptimum wireless network in the priority sequence table, the rest may be inferred, not identical and do not switch until the network priority of its priority level of network of selecting and current use;
7), then finish if do not start adaptive process.
Please refer to shown in Figure 3ly, will be explained in further detail the preferred embodiments of the present invention below.
The wireless device that uses in this preferred embodiment can adapt to GSM, GPRS and wlan network.
1) execution in step 31, determine the wireless device (GSM mobile handset, GPRS card, WLAN card etc.) of the current use of user;
2) execution in step 32, the wireless network type of determining to adapt to according to the wireless device that uses is (as using the GPRS card, then can adapt to GSM and GPRS network, as use the WLAN card, then can adapt to wlan network, as using GPRS and WLAN card simultaneously, then can adapt to three kinds of networks of GSM, GPRS and WLAN);
3) execution in step 33, and scanning can adapt to the WLAN wireless network that transmission rate is the highest in the wireless network, obtain its network signal intensity;
4) execution in step 34, and scanning can adapt to transmission rate time high GPRS wireless network in the wireless network, obtains its network signal intensity;
5) execution in step 35, and scanning can adapt to the gsm wireless network that transmission rate is minimum in the wireless network, obtains its network signal intensity;
6) execution in step 36, just set up by transmission rate to adapt to network list;
7) execution in step 37, and judgement can adapt to whether the network that transmission rate is the highest in the network list is the network of current use, if, then forward step 33 to, otherwise execution in step 38;
8) execution in step 38, switch to the network of selection;
9) execution in step 39, judge whether switching is successful;
10) if handover success, execution in step 310 is interrupted legacy network and is connected, and preserves the current network type, execution in step 33;
11) if switching is unsuccessful, execution in step 311, deletion can adapt to the highest network of transmission rate in the network list, execution in step 37;
Above-mentioned steps can be used in wireless network repeatedly in real time, and each all is in the optimum network constantly to make the network equipment.
Claims (13)
1. the method for a self-adapting selection network is characterized in that may further comprise the steps:
1) determine the wireless device type that terminal equipment uses, described wireless device type is one or more;
2) described terminal equipment determines to adapt to which network type according to the wireless device type that obtains in the step 1);
3) described terminal equipment is according to step 2) in resulting network type, corresponding network is carried out real time scan, obtain the signal characteristic data that all can adapt to wireless network;
4) described terminal equipment compares the wireless network signal characteristic that obtains in the step 3) with predefined performance index, judge whether this network can start self adaptation, carry out record according to the priority of set adaptive network mode thereby can start adaptive network;
5) start self adaptation, then terminal equipment will pass through the priority that write down, and the override wireless network the selected network type with current use is compared, if identical, then not switch, otherwise automatically switch to prepreerence wireless network;
6), then finish if do not start self adaptation.
2. the method for self-adapting selection network according to claim 1, it is characterized in that: in the step 3) corresponding network being carried out real time scan is to carry out according to the priority of the adaptive network mode that sets in advance.
3. as the method for self-adapting selection network as described in the claim 2, it is characterized in that: the priority of adaptive network mode is to move to the order in high priority area of wireless network coverage territory from low priority area of wireless network coverage territory.
4. as the method for self-adapting selection network as described in the claim 2, it is characterized in that: the priority of adaptive network mode is the priority standard to move to low priority area of wireless network coverage territory from high priority area of wireless network coverage territory.
5. as the method for self-adapting selection network as described in the claim 2, it is characterized in that: the priority of adaptive network mode is not with only when the wireless network signal of current use exists, and adapting to other wireless networks is the priority standard.
6. as the method for self-adapting selection network as described in the claim 2, it is characterized in that: the priority of adaptive network mode defines the priority level of wireless network voluntarily according to user's needs.
7. as the method for self-adapting selection network as described in the claim 6, it is characterized in that: the priority level that the user need define wireless network voluntarily can be a benchmark with expense, transmission rate or expense/transmission rate.
8. the method for self-adapting selection network according to claim 1, it is characterized in that: in the step 3) corresponding network being carried out real time scan is to carry out with random fashion.
9. the method for self-adapting selection network according to claim 1, it is characterized in that: the characteristic in the step 3) is the intensity of network signal.
10. as the method for self-adapting selection network as described in the claim 9, it is characterized in that: judge in the step 4) whether this network can start self adaptation, be to compare with predefined access threshold value according to the acquisition network signal intensity, when signal strength signal intensity when inserting threshold value, then write down this network; Otherwise this network can not start self adaptation.
11. the method for self-adapting selection network is characterized in that: carry out record in the mode of tabulation or database in the step 4) according to claim 1.
12. the method for self-adapting selection network according to claim 1, it is characterized in that: step 5) further comprises if successfully insert the override wireless network of selecting, then interrupt the legacy network connection and preserve the network type of current use, otherwise switch to suboptimum wireless network in the priority sequence table, the rest may be inferred, not identical and do not switch until the network priority of its priority level of network of selecting and current use.
13. the method for self-adapting selection network according to claim 1 is characterized in that: this method can be used in wireless network repeatedly in real time, and terminal equipment all is in the optimal wireless network constantly.
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| CNB021579687A CN100464516C (en) | 2002-12-23 | 2002-12-23 | A method for adaptive network selection |
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| CN100452735C (en) * | 2004-07-28 | 2009-01-14 | 美国博通公司 | Method and equipment for supporting handoff of a multimedia call session using background network scanning |
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| EP1959703A1 (en) * | 2007-02-15 | 2008-08-20 | British Telecommunications Public Limited Company | Handover of wireless connections |
| CN101370303B (en) * | 2008-09-22 | 2012-05-30 | 宇龙计算机通信科技(深圳)有限公司 | Network selection method, terminal and system |
| CN101720107B (en) * | 2009-03-23 | 2013-05-29 | 上海通琅信息技术有限公司 | Multi-way integrated communication system and method for wireless multimedia transmission |
| US8379551B2 (en) * | 2009-08-18 | 2013-02-19 | Qualcomm Incorporated | Radio selection in a multi-radio device |
| CN101668322B (en) * | 2009-09-17 | 2012-06-27 | 华为终端有限公司 | Network switching method of terminal and terminal equipment |
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