CN100417113C - Group distribution method at group wheel mode in radio local network system - Google Patents

Group distribution method at group wheel mode in radio local network system Download PDF

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CN100417113C
CN100417113C CNB2005100117942A CN200510011794A CN100417113C CN 100417113 C CN100417113 C CN 100417113C CN B2005100117942 A CNB2005100117942 A CN B2005100117942A CN 200510011794 A CN200510011794 A CN 200510011794A CN 100417113 C CN100417113 C CN 100417113C
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group
base station
base stations
access point
threshold values
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CN1870550A (en
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孙公航
李峰
张朝阳
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ZTE Corp
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ZTE Corp
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Abstract

The present invention relates to a group distribution method in a mode of group alternation in a WLAN system, which is used for carrying out group distribution to base stations covered by the same access point in the WLAN system, wherein the base stations are divided into a plurality of groups. The method comprises the following steps: attributes of the base stations are defined, and the base stations are categorized; then the group distribution is carried out to the base stations which are divided into a plurality of base station groups; the access point dynamically recategorizes the base stations covered by the access point when that a new base station joins is detected, or when a condition that a data service flow of a base station group is over a preset upper limit or is below a preset lower limit exists. The group distribution of the present invention reduces collision frequency and increases points-to-point access efficiency.

Description

Group distribution method in a kind of wireless local area network (WLAN) system under the group wheel mode
Technical field
The present invention relates to the wireless lan (wlan) system in the communications field, relate in particular to and adopt group wheel mode to improve a kind of group distribution method of how point-to-point access efficiency in the WLAN (wireless local area network).
Background technology
In wlan system, according to general WLAN (wireless local area network) underlying protocol standard IEEE 802.11 (or IEEE802.11x), adopt CSMA/CD (Carrier Sense Multiple Access with Collision Detection, the Carrier Sense Multiple Access that the band conflict is avoided) mode to solve the problem of the shared wireless channel of a plurality of websites (STA).Simultaneously in order to improve access efficiency, in the IEEE802.11x agreement, also have auxiliary RTS/CTS agreement etc., purpose all is reductions of the efficiency of transmission that causes for the collision that reduces the frame of multi-user in access procedure.Outside this agreement, also has more special group wheel mode (TPF) (Team PollingFunction) mode that adopts.This kind mode with the basis of WLAN (wireless local area network) underlying protocol standard IEEE 802.11 compatibilities on, employing is to the mode of STA (STAtions) grouping, the STA of grouping is carried out the mode of poll by access point AP (Access Point), by reducing the quantity of the STA insert AP simultaneously, reach and reduce that STA inserts simultaneously and the purpose that causes colliding.Grouping is a dynamic process, adjusts with the traffic carrying capacity of Packet data service, and can group forming criterion directly cause TPF reach the purpose that reduces collision or raise the efficiency.If packet mode is unreasonable, if adopt the TPF method, instead can cause the reduction of the access efficiency of system.
Summary of the invention
Technical problem to be solved by this invention is to provide the group distribution method under the group wheel mode in a kind of wireless local area network (WLAN) system, satisfy the requirement compatible under the TPF mode with WLAN (wireless local area network) underlying protocol standard IEEE 802.11 (or IEEE802.11x), reach and reduce collision, improve the purpose of access efficiency simultaneously.
To achieve these goals, the invention provides the group distribution method under the group wheel mode in a kind of wireless local area network (WLAN) system, be used for group allocation is carried out in the base station under the same access point covering of this wireless local area network (WLAN) system, be divided into a plurality of group of base stations, its characteristics are, comprise the steps:
The attribute of definition base station is classified the base station, and first kind base station is relative responsible consumer or the user that specific demand is arranged, and this wireless local area network (WLAN) system guarantees that by configuration each user enjoys a fixing wireless bandwidth resource or a relatively-stationary wireless bandwidth resource; The second class base station is a domestic consumer, and the surplus resources except that the shared wireless bandwidth resource of responsible consumer is shared by each domestic consumer;
Group allocation is carried out in the base station, be divided into a plurality of group of base stations;
Access point is detecting that new base station adds or the data service flow that has a group of base stations when surpassing preset upper limit or being lower than predetermined lower limit, divides into groups again in the base station under dynamically this access point being covered.
Above-mentioned group distribution method, its characteristics are that described process of dynamically being divided into groups again in the base station under this access point covering comprises the steps:
Distribution adjustment process between the group of base station, the quantity of the group of base stations under same access point covers is constant, the base station number adjustment that distributes between the group of the group of base stations under covering for same access point.
Above-mentioned group distribution method, its characteristics are, in the distribution adjustment process, comprise the steps: between the group of base station
Step 201 is handled inlet in process, and access point is in idle condition, and whether detect has new base station to add, and waiting process triggers or timer triggers;
Step 202 judges whether access point detects new base station and add, if there is new base station to add, then changes step 207 over to; If do not have new base station to add, then change step 203 over to.
Step 203 judges that whether the timer time that divides into groups again surpasses regularly, if timer time is less than, then changes step 204 over to; If the time to change step 205 over to;
Step 204 stops distribution adjustment process between group of base stations;
Step 205, in timer official hour section, by access point the group data stream amount and the collision frequency of each group of base stations are added up, the data traffic addition of all base stations in each group of base stations is obtained the flow sum of each group of base stations, the collision frequency addition of all base stations in each group of base stations is obtained the collision frequency sum of each group of base stations;
Step 206, carry out the threshold values value, this threshold values is made up of flow threshold values and collision frequency threshold values two parts, whether whether the flow sum of judging each group of base stations surpass the collision frequency threshold values above flow threshold values and collision frequency sum, if any surpasses flow threshold values and collision frequency threshold values in flow sum and the collision frequency sum, then change step 207 over to, otherwise return step 201;
Step 207 is divided into groups again to the base station of each group of base stations, and the quantity adjustment is carried out in the base station of each group of base stations;
Step 208 is configured the modification of information and preserves the relevant process of end after preservation finishes for the base station of adjusting in all group of base stations that finish.
Above-mentioned group distribution method, its characteristics are, in step 207, comprise following steps:
If threshold values surpasses, then will adjust to the group of base stations that other does not surpass threshold values above at least one base station in the group of base stations of threshold values;
If there is new base station to add, then according to existing grouping situation, selecting is not the group of base stations of fixing grouping, according to every group flow and collision frequency, selects the group of collision frequency minimum to add new base station.
Above-mentioned group distribution method, its characteristics are that in step 205, group data stream quantitative statistics data come from other network equipment on access point upper strata, and in step 206, the setting of this threshold values can be adopted artificial setting or be made as fixed value.
Above-mentioned group distribution method, its characteristics are that described process of dynamically being divided into groups again in the base station under this access point covering further comprises the steps:
The group number of group of base stations is adjusted process, and the quantity of the group of base stations under covering for same access point is adjusted.
Above-mentioned group distribution method, its characteristics are, count in the adjustment process in the group of group of base stations, comprise the steps:
Step 301, congested observation window is set, for estimating, its upper limit represents that current base station distributes makes the congestion condition of network exceed allowed band to this congested observation window with collision frequency and data traffic parameter, and lower limit represents that current base station distributes makes in the group BTS service intensity low excessively;
Step 302 judges that whether this congested observation window exceeds the congested observation window upper limit, if then enter step 303, otherwise enters step 306;
Step 303 judges whether distribution adjustment process finishes between the group of base station, does not finish then enters step 304 if adjust, and enters step 305 if adjusted finishes;
Step 304, distribution adjustment process between the group of execution base station is returned step 302 after adjustment finishes;
Step 305 increases packet count, and carries out the base station grouping again, and grouping is returned step 302 after finishing;
Step 306 judges that whether this congested observation window is less than congested observation window lower limit, if then enter step 307, otherwise returns step 302;
Step 307 reduces packet count, and carries out the base station grouping again, and grouping is returned step 302 after finishing.
Above-mentioned group distribution method, its characteristics are that the group number of distribution adjustment process and group of base stations adjustment process can be carried out respectively or carry out simultaneously between the group of this base station.
Above-mentioned group distribution method, its characteristics are that in step 305, the increase of this packet count is subjected to the restriction of a largest packet number.
Above-mentioned group distribution method, its characteristics are that in step 307, the minimizing of this packet count is subjected to the restriction of a minimum packets number.
According to an aspect of the present invention, adopt group wheel mode dynamically the base station under the same access point covering to be adjusted, reduced collision frequency, improved how point-to-point access efficiency in the WLAN (wireless local area network), realized the flexible dispatching of STA resource.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the composition Organization Chart of wireless local area network (WLAN) system of the present invention;
Fig. 2 is the flow chart of group distribution method of the present invention;
Fig. 3 is the flow chart of distribution adjustment process between the group of base station in the grouping of base station of the present invention;
Fig. 4 is the flow chart that the group number of group of base stations in the grouping of base station of the present invention is adjusted process.
Embodiment
As shown in Figure 1, the wlan system that shows the access part that is in data network is formed framework.Data network comprises access or backbone network or the access layer network of access point is provided, access point AP (Access Point) 101 as WLAN among the figure adopts group network that the access point AP of wheel technology is covered, and the base station STA that represents this all scopes is all by this access point AP network insertion data network.Include in the scope that this access point 101 is covered a plurality of base stations of inserting by access point 101 (STA, STAtions) 105～111, comprise wireless network card equipment.
In the present invention, STA among the figure mainly can be defined as two big classes, first kind base station is relative responsible consumer, or the user of specific demand is arranged, system guarantees the wireless bandwidth resource of the wireless bandwidth resource that these certain customers are fixed or the platform that is relatively fixed by configuration.The second class base station is a domestic consumer, and each user shares the surplus resources except that responsible consumer or special user.Then group allocation is carried out in the base station, be divided into a plurality of group of base stations, for example, as shown in Figure 1, domestic consumer 105～107 3 base station STA11, STA12, STA1n packet group are become grouping 1 (label is 103), domestic consumer 108～110 3 base station STA21, STA22, STA2n packet group are become grouping 2 (label is 104), the independent packet group of 111 1 base station STAil of responsible consumer is become grouping i (label is 105).
Access point of the present invention is after finishing the initial packet of base station, access point is detecting that new base station adds or the data service flow that has a group of base stations when surpassing preset upper limit or being lower than predetermined lower limit, divide into groups again in the base station under this access point can dynamically cover this access point.
In the present invention, the base station divides into groups mainly to comprise two aspects again, the firstth, and distribute between the group of base station and adjust, promptly the quantity of the group of the STA under the covering of same AP is constant, and the STA quantity of the STA group under covering for same AP is adjusted; Promptly the grouping shown in Fig. 11 is adjusted to the STA in the grouping i.The secondth, the group of group of base stations is counted adjustment, and the quantity of the STA group under covering for AP is adjusted, and promptly grouping shown in Figure 11 is adjusted to the quantity of grouping i.The adjustment of STA grouping and number of packet can be carried out respectively or carry out simultaneously.
Method for distributing and adjust between the group of STA as shown in Figure 2, shows the flow process of its adjustment, comprising:
Step 201 is handled inlet in process, and access point is in idle condition, and whether detect has new base station to add, and waiting process triggers or timer triggers;
Step 202 judges whether access point detects new base station and add, if there is new base station to add, then enters step 207 and divides into groups again; If do not have new base station to add, then enter step 203.
Step 203 judges that whether the timer time that divides into groups again surpasses regularly, if timer time is less than, then enters step 204; If the time to enter next step 205;
Step 204 distributes between the group of end STA and adjusts;
Step 205, in timer official hour section, by access point the group data stream amount and the collision frequency of each group of base stations are added up, the data traffic addition of all base stations in each group of base stations is obtained the flow sum of each group of base stations, the collision frequency addition of all base stations in each group of base stations is obtained the collision frequency sum of each group of base stations;
Step 206, carry out the threshold values value, this threshold values is made up of flow threshold values and collision frequency threshold values two parts, whether whether the flow sum of judging each group of base stations surpass the collision frequency threshold values above flow threshold values and collision frequency sum, if any surpasses flow threshold values and collision frequency threshold values in flow sum and the collision frequency sum, then change step 207 over to, otherwise return step 201;
Step 207 is divided into groups again to the base station of each group of base stations, and the quantity adjustment is carried out in the base station of each group of base stations, will adjust to the group of base stations that other does not surpass threshold values above at least one base station in the group of base stations of threshold values; If there is new STA to add, then according to existing grouping situation, selecting is not the STA group (promptly not being the group of base stations that responsible consumer or the user that specific (special) requirements is arranged etc. are assigned the fixed-bandwidth resource) of fixing grouping, according to every group flow and collision frequency, select the group of collision frequency minimum to add new STA.
Step 208 is configured the modification of information and preserves the relevant process of end after preservation finishes for the base station of adjusting in all group of base stations that finish.
In addition, for the adjustment of packet count as shown in Figure 3, comprising:
Step 301 is provided with congested observation window, and for estimating, its upper limit represents that current STA distributes makes the congestion condition of network exceed allowed band to congested observation window with collision frequency and flow parameter, and lower limit represents that current STA distributes makes in the group STA traffic intensity low excessively.
Step 302 judges that whether this congested observation window exceeds the congested observation window upper limit, if then enter step 303, otherwise enters step 306;
Step 303 is judged whether distribution adjustment process is adjusted between the group of base station to finish, and does not finish then enters step 304 if adjust, and enters step 305 if adjusted finishes;
Step 304, distribution adjustment process between the group of execution base station is adjusted base station distribution between group of base stations, return step 302 after adjustment finishes;
Step 305 increases packet count, and carries out the base station grouping again, and grouping is returned step 302 after finishing;
Step 306 judges that whether this congested observation window is less than congested observation window lower limit, if then enter step 307, otherwise returns step 302;
Step 307 reduces packet count, and carries out the base station grouping again, and grouping is returned step 302 after finishing.
Preferably, in step 305, the packet count increase will be subjected to the restriction of largest packet number, and in step 307, packet count reduces also will be subjected to the restriction of minimum packets number.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims (10)

1. the group distribution method under the group wheel mode in the wireless local area network (WLAN) system, group allocation is carried out in the base station under being used for the same access point of this wireless local area network (WLAN) system covered, and is divided into a plurality of group of base stations, it is characterized in that, comprises the steps:
The attribute of definition base station is classified the base station, and first kind base station is relative responsible consumer or the user that specific demand is arranged, and this wireless local area network (WLAN) system guarantees that by configuration each user enjoys a fixing wireless bandwidth resource or a relatively-stationary wireless bandwidth resource; The second class base station is a domestic consumer, and the surplus resources except that the shared wireless bandwidth resource of responsible consumer is shared by each domestic consumer;
Group allocation is carried out in the base station, be divided into a plurality of group of base stations;
Access point is detecting that new base station adds or the data service flow that has a group of base stations when surpassing preset upper limit or being lower than predetermined lower limit, divides into groups again in the base station under dynamically this access point being covered.
2. group distribution method according to claim 1 is characterized in that, described process of dynamically being divided into groups again in the base station under this access point covering comprises the steps:
Distribution adjustment process between the group of base station, the quantity of the group of base stations under same access point covers is constant, the base station number adjustment that distributes between the group of the group of base stations under covering for same access point.
3. group distribution method according to claim 2 is characterized in that, in the distribution adjustment process, comprises the steps: between the group of base station
Step 201 is handled inlet in process, and access point is in idle condition, and whether detect has new base station to add, and waiting process triggers or timer triggers;
Step 202 judges whether access point detects new base station and add, if there is new base station to add, then changes step 207 over to; If do not have new base station to add, then change step 203 over to.
Step 203 judges that whether the timer time that divides into groups again surpasses regularly, if timer time is less than, then changes step 204 over to; If the time to change step 205 over to;
Step 204 stops distribution adjustment process between group of base stations;
Step 205, in timer official hour section, by access point the group data stream amount and the collision frequency of each group of base stations are added up, the data traffic addition of all base stations in each group of base stations is obtained the flow sum of each group of base stations, the collision frequency addition of all base stations in each group of base stations is obtained the collision frequency sum of each group of base stations;
Step 206, carry out the threshold values value, this threshold values is made up of flow threshold values and collision frequency threshold values two parts, whether whether the flow sum of judging each group of base stations surpass the collision frequency threshold values above flow threshold values and collision frequency sum, if any surpasses flow threshold values and collision frequency threshold values in flow sum and the collision frequency sum, then change step 207 over to, otherwise return step 201;
Step 207 is divided into groups again to the base station of each group of base stations, and the quantity adjustment is carried out in the base station of each group of base stations;
Step 208 is configured the modification of information and preserves the relevant process of end after preservation finishes for the base station of adjusting in all group of base stations that finish.
4. group distribution method according to claim 3 is characterized in that, in step 207, comprises following steps:
If threshold values surpasses, then will adjust to the group of base stations that other does not surpass threshold values above at least one base station in the group of base stations of threshold values;
If there is new base station to add, then according to existing grouping situation, selecting is not the group of base stations of fixing grouping, according to every group flow and collision frequency, selects the group of collision frequency minimum to add new base station.
5. group distribution method according to claim 4, it is characterized in that in step 205, group data stream quantitative statistics data come from other network equipment on access point upper strata, and in step 206, the setting of this threshold values can be adopted artificial setting or be made as fixed value.
6. according to claim 2 or 3 or 4 or 5 described group distribution methods, it is characterized in that described process of dynamically being divided into groups again in the base station under this access point covering further comprises the steps:
The group number of group of base stations is adjusted process, and the quantity of the group of base stations under covering for same access point is adjusted.
7. group distribution method according to claim 6 is characterized in that, counts in the adjustment process in the group of group of base stations, comprises the steps:
Step 301, congested observation window is set, for estimating, its upper limit represents that current base station distributes makes the congestion condition of network exceed allowed band to this congested observation window with collision frequency and data traffic parameter, and lower limit represents that current base station distributes makes in the group BTS service intensity low excessively;
Step 302 judges that whether this congested observation window exceeds the congested observation window upper limit, if then enter step 303, otherwise enters step 306;
Step 303 judges whether distribution adjustment process finishes between the group of base station, does not finish then enters step 304 if adjust, and enters step 305 if adjusted finishes;
Step 304, distribution adjustment process between the group of execution base station is returned step 302 after adjustment finishes;
Step 305 increases packet count, and carries out the base station grouping again, and grouping is returned step 302 after finishing;
Step 306 judges that whether this congested observation window is less than congested observation window lower limit, if then enter step 307, otherwise returns step 302;
Step 307 reduces packet count, and carries out the base station grouping again, and grouping is returned step 302 after finishing.
8. group distribution method according to claim 7 is characterized in that, the group number of distribution adjustment process and group of base stations adjustment process can be carried out respectively or carry out simultaneously between the group of this base station.
9. group distribution method according to claim 8 is characterized in that, in step 305, the increase of this packet count is subjected to the restriction of a largest packet number.
10. group distribution method according to claim 8 is characterized in that, in step 307, the minimizing of this packet count is subjected to the restriction of a minimum packets number.
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CN101399728B (en) * 2007-09-30 2012-04-04 华为技术有限公司 Network, method and access point for sharing bandwidth
CN103220788B (en) 2012-01-19 2016-08-24 华为技术有限公司 Method, node and the access point that node is grouped
KR101331376B1 (en) * 2012-03-23 2013-11-20 삼성에스디에스 주식회사 Apparatus for managing network zone having a plurality of wireless access points, method for connecting mobile device using the apparatus, and mobile device connected using the method
CN103533658B (en) * 2012-07-03 2019-02-19 中兴通讯股份有限公司 The dispatching method and system of wireless client STA
WO2014179997A1 (en) * 2013-05-10 2014-11-13 华为技术有限公司 Information notification and receiving method, apparatus and system of radio access network
CN106712980B (en) * 2015-07-17 2021-02-19 中兴通讯股份有限公司 Network element grouping method and device and communication system

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WO2005015846A2 (en) * 2003-08-08 2005-02-17 Intel Corporation Arranging sdma poll groups by response length

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