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WO2009074118A1 - Procédé, système et appareil pour fusionner de multiples groupes de balises - Google Patents

Procédé, système et appareil pour fusionner de multiples groupes de balises Download PDF

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Publication number
WO2009074118A1
WO2009074118A1 PCT/CN2008/073499 CN2008073499W WO2009074118A1 WO 2009074118 A1 WO2009074118 A1 WO 2009074118A1 CN 2008073499 W CN2008073499 W CN 2008073499W WO 2009074118 A1 WO2009074118 A1 WO 2009074118A1
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WIPO (PCT)
Prior art keywords
weight
beacon
merge
merging
merged
Prior art date
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PCT/CN2008/073499
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English (en)
Chinese (zh)
Inventor
Pei Liu
Pingping Xu
Ting ZUO
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication of WO2009074118A1 publication Critical patent/WO2009074118A1/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/186—Processing of subscriber group data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a method, system and apparatus for merging multiple beacon groups. Background technique
  • UWB Ultra Wideband
  • WPAN Wireless Personal Area
  • Network wireless personal area network
  • each superframe consists of 256 MASs (Media Access Slots) with a length of 256us.
  • the beginning of the superframe must be used for beacon-related activities (such as sending beacons of the device, beacons listening to neighboring devices, etc.), this part is called BP (Beacon Period); the rest is used for The transmission service or control data frame is called DTP (Data Transmit Period).
  • BP Beacon Period
  • DTP Data Transmit Period
  • BP Beacon Slot
  • BPST Beacon Period Start Time
  • DTP devices can use DRP (distributed)
  • the reservation protocol Distribution Protocol
  • PCA Principal Access
  • beacons generally carry all kinds of important information such as addressing, reservation, scheduling, and competition required for accessing media; on the other hand, in ECMA-368 WPAN, all devices are equivalent. There are no special devices for central control, which requires each device to announce its existence by sending its own beacon, and to monitor the presence and action of other devices by monitoring the beacons of other devices. Structure 1: As shown in FIG.
  • Structure 2 As shown in FIG. 3, it is a network topology diagram of a prior art distributed architecture, which adopts a centralized architecture based on a special central control device and draws a completely distributed architecture. Similar to Structure 1, Structure 2 subdivides the network into multiple BGs (Beacon Groups), where BG refers to a group of devices (DEVs) that have the same BPST and send beacons in the same BP. Each device has the same BPST, except that different devices occupy different beacons in the BP. A BG can construct a BP. There may also be two or more BGs with different BPSTs in the network, that is, there are multiple BPs.
  • BGs Beacon Groups
  • DEVs devices
  • a BG can construct a BP.
  • the device in a BG receives a beacon from another BG, such a beacon is called an alien beacon, the BP where the alien beacon is located is called an external BP, and the BPST of the external BP is called an external BPST.
  • the alien beacon can communicate normally without any foreign beacons.
  • the alien beacon is told that two or more BGs enter each other in the network.
  • the devices in the BG must Beginning to relocate the BS that sent the beacon itself to fuse with other BGs to communicate.
  • the centralized architecture beacon frame of structure 1 is only transmitted by the PNC, it is relatively easy to solve the interference problem between multiple piconets under the condition of unified management of the central control device and proper selection of the channel access algorithm. of.
  • the architecture uses a fully distributed architecture, the lack of a unified time concept from the central control device, plus the mobile nature of the network device, makes it difficult to achieve synergy between multiple BGs.
  • the prior art proposes a BPs coordinated merging scheme for solving the distributed architecture of the structure 2.
  • Each BG in the network must construct its own BP according to the prescribed BP formation process, and the devices in the BG select a BS period in the BP.
  • the transmitted beacon frame carries the beacon slot position information (beacon slot number) occupied by the BS in the BP, and will include a BPOIE (Beacon Period Occupancy Information Element, letter)
  • the standard period occupies IE), where the BPOIE is one of many IEs, providing information about the current BP, such as: the length of the BP, the situation in which the BSs are occupied in the BP, and the like.
  • the device includes or modifies the BP Switch IE in its own beacon frame.
  • the BP Switch IE is one of many IEs and contains three important fields: BP Move Countdown, BPST Offset, Beacon Slot Offset.
  • the value of BP Move Countdown is the number of superframes the device needs to wait before adjusting BPST; BPST
  • the value of Offset is the length of time that the device needs to delay its own BPST;
  • the value of Beacon Slot Offset is the number of beacon slots that the device needs to offset from the original beacon slot in the combined new BP.
  • the device receives an alien beacon (a beacon belonging to another BG device), it is divided into the following four cases:
  • the received foreign beacon contains BP Switch IE, it means that the external BP is in the merge, and the device will not relocate its own beacon to that external BP.
  • the device will include the BP Switch IE when sending the beacon in the next superframe, and its domain is set to the calculated value in 1, BP Move Countdown is set to 9;
  • the device modifies the BP Switch IE when sending the beacon in the succeeded superframe:
  • BPST Offset and Beacon Slot Offset in BP Switch IE do not change anything.
  • the device detects that the BP Switch IE is included in the beacon of the neighboring device (in this BG), it is divided into the following three cases:
  • the device modifies the BP Switch IE when sending the beacon in the connected superframe:
  • BPST Offset and Beacon Slot Offset in BP Switch IE do not change anything.
  • BP Move Countdown is decremented by 1.
  • the device in the BG contains the BP Switch IE in the beacon sent by itself, and the device will relocate its beacon according to the information and resend and receive in the merged new BP. Beacon.
  • the device will delay its BPST according to the value of BPST Offset in the BP Switch IE.
  • Calculate the beacon slot number of the BS that retransmits the beacon in the merged new BP according to the value of the Beacon Slot Offset in the BP Switch IE, where the new beacon slot number the original beacon slot number + Beacon Slot Offset 0
  • the device will select an idle BS from the merged new BP according to the rule of normal joining BP. Your own beacon.
  • the BP Switch IE will no longer be included in the beacon after the device successfully relocates its own beacon.
  • the inventors have found that at least the following problems exist in the prior art:
  • the BPST of the BG at the latest BPST in the network is always selected as the reference BPST.
  • Other BG devices will relocate their beacons based on the benchmark BPST. Therefore, in the prior art, when performing multiple BG fusions, only the latest BST of the BPST is used as a reference, and the actual situation of the network, such as the network size of each BG, is not considered, so that the merge time is long, and the device communication is interrupted due to the merge process. Long technical defects.
  • BG1 has eight devices (A, B, C, D, E, F, G, H).
  • BG2 has 2 devices (1, J), while BG3 has 8 devices (K, L, M, N, 0, P, Q, R).
  • K, L, M, N, 0, P, Q, R the number of BGs in the network and the devices in each BG The number can be chosen arbitrarily without affecting the conclusions that follow.
  • BG1, BG2, and BG3 are far enough apart from each other, and they construct their own BP1, BP2, and BP3 according to the specified BP construction process, as shown in Figure 5, which is the prior art BG1.
  • BPST1, BPST3, and BPST2 are successively behind, and the BS occupied by each device has been marked in the figure, and #0 and #1 represent signaling beacon slots.
  • each BG has been able to communicate normally and independently. Note that devices outside the two-hop range of BP1 and BP3 can share the BS to improve the utilization of the BS.
  • A, F, and H can share one BS.
  • B, D, and G can share one BS.
  • Can enter each other assuming that device D in BG1 can receive the beacon (external beacon) sent by the device in BG2, and devices A and E in BG1 can receive the beacon sent by the device in BG3, but other devices cannot .
  • the BG is late, so BG2 is used as the benchmark BG, and BG1 and BG3 are merged into BG2.
  • a schematic diagram of the final combined results of BG 1, BG 2 and BG 3 is shown in Fig. 6.
  • BG1 and BG 2 are merged into BG 4 first, and BG 1 and BG 2 are merged into BG 4 first, when BG1 detects foreign beacons and BPs merge to the final completion of BG 1, BG 2 and BG 3 combination.
  • BG 3 is merged with BG 4.
  • each device in BG 1 and BG 3 adjusts its BPST and relocates the beacon in a superframe, at which point all data communication related to the device in the network is interrupted.
  • the waste of channel resources that would result in at least one superframe time per device is a waste of at least two superframe times for the DRP reservation process.
  • the 27 superframe times spent on the three BG merging processes also bring great delays to the data communication within the network. Summary of the invention
  • the problem to be solved by the embodiments of the present invention is to provide a method, a system, and a device for merging multiple beacon groups, which solves the problem that the BG of the latest BPST is used as the merging reference BG in the prior art, thereby causing a long merge time and causing the device.
  • the data communication interruption time is long, which causes technical defects in network throughput performance and delay performance to be significantly degraded.
  • an embodiment of the present invention provides a method for merging multiple beacon groups, including at least two BGs, a first BG, and a second BG, including: the first BG and the second BG. Interacting to obtain the merge weight and the beacon parameter of the other party; selecting one of the first BG and the second BG that has a larger merge weight value as the merge reference BG; wherein, if the merge right of the first BG is greater than the first And combining, by the second BG, the first BG is a merged reference BG, and the second BG merges with the first BG according to the beacon parameter of the first BG.
  • an embodiment of the present invention further provides a method for merging multiple beacon groups, including The method includes the following steps: the device receives an alien beacon of the external BG, where the foreign beacon carries the merge weight of the external BG and the beacon parameter of the external BG; the device according to the merge weight and the beacon of the external BG The parameter generates a BG merged IE of the device, and broadcasts to the neighboring device of the device; the neighboring device updates the BG merged IE of the neighboring device after receiving the BG merged IE of the device; The BG determines the merge weight of the BG according to the merge weight of the device in the BG, and the BG merge weight is smaller than the external BG. For the merge weight, the external BG is used as the merge reference BG, and all the devices in the BG merge to the external BG according to the beacon parameters of the external BG.
  • the embodiment of the present invention further provides a multi-beacon group merging system, including at least two BGs, a first BG and a second BG, and the device in the first BG is configured to receive and record the second BG. Consolidating weights and beacon parameters, and transmitting the combining weights and beacon parameters of the second BG to other devices in the first BG; and combining the combining weights and beacon parameters of the first BG to the second a device in the BG, where the device in the second BG is configured to send the combining weight and the beacon parameter of the second BG to the device in the first BG, and receive and record the first BG.
  • a multi-beacon group merging system including at least two BGs, a first BG and a second BG, and the device in the first BG is configured to receive and record the second BG.
  • the embodiment of the present invention further provides an apparatus, including: an external beacon receiving module, configured to receive an external beacon of an external BG, where the foreign beacon carries a combined weight of the external BG and a letter of the external BG a record sending module, configured to record a merge weight and a beacon parameter of the external BG and broadcast to other devices in the BG to which the device belongs; a reference BG selection module, configured to merge according to the received external BG The weight determines whether the external BG is used as the consolidation reference BG; the merge module is used to merge the merged reference BGs selected by the reference BG selection module.
  • An embodiment of the present invention further provides a method for merging multiple beacon groups, including at least two The BG, the first BG, and the second BG, specifically: the second BG receives the merge weight and the beacon parameter of the first BG sent by the first BG; if the merge right of the first BG is greater than the For the second BG, the second BG is merged with the first BG, and the second BG is merged with the first BG according to the beacon parameter of the first BG.
  • the technical solution of the embodiment of the present invention has the following advantages: Because the consolidation weight of each BG is set, the consolidation weight indicates the difficulty of merging the BG with other BGs, and needs to be considered in the BG merger.
  • the merge weight of the BG to be merged, and the BG with the largest merge weight is selected as the merge benchmark BG, and the other BGs are merged to the selected merge benchmark BG. Therefore, it can ensure that the multi-BP merge process takes the shortest time and the network communication interruption time is the least, which can greatly improve the performance of the network.
  • FIG. 1 is a superframe structure in the prior art ECMA-368 MAC protocol
  • FIG. 2 is a network topology diagram of a prior art centralized architecture
  • FIG. 3 is a network topology diagram of a prior art distributed architecture
  • FIG. 5 is a schematic diagram of beacons of BG 1, BG 2, and BG 3 in the prior art
  • FIG. 6 is a schematic diagram of final combining results of BG 1, BG 2, and BG 3 in the prior art
  • FIG. 7 is a plurality of BGs according to an embodiment of the present invention
  • FIG. 10 is a flow chart of a beacon interaction in the BG 3 according to an embodiment of the present invention.
  • FIG. 11 is a result of combining the BP 1 , BP 2 , and BP 3 according to an embodiment of the present invention
  • FIG. 12 is a structural diagram of a merged system of multiple beacon groups according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a device according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention mainly aims to set a merge weight of each BG, the BG
  • the merging weight is the maximum value of the merging weight of the device in the BG, and the merging weight of the device is the number of devices that the device can detect.
  • the merge weight of the BG indicates the difficulty of merging the BG with other BGs. For example, if the number of devices in the BG is large, then the BG merges with other BGs, which requires more superframe time, so the merge weight of the BG.
  • the two-hop range of the device in the BG is considered to be a valid detection range, that is, the combining weight of the device is the number of devices included in the two-hop range of the device.
  • the merge weights proposed by the embodiments of the present invention need to take into account the merge weights of the BGs to be merged in the BG merge, and select the BG with the largest merge weight as the merge reference BG, and the other BGs merge them. Rather than always choosing BPST's latest BG as a benchmark, as in the prior art, the benefit is that it saves the superframe time required for the merge. For a simple example, taking BG 1 and BG 2 as an example, BG 1 has a larger network and more internal devices, so the merge weight is also larger. It is assumed that it requires 18 superframes to make the BG 1 internal. All devices complete the redefinition of their own beacons. For BG 2, the network size is smaller and the combined weights are smaller.
  • the foregoing merge weight is only a preferred embodiment of the present invention by the number of devices included in the two-hop range of the device in the BG, and the merge weight can also refer to the BG.
  • the number of devices in the device the number of devices on the longest link in the BG, and so on.
  • the focus of the embodiment of the present invention is that the BG merging needs to consider the difficulty level of the BG merging (ie, the merging weight), and always selects the BG with the largest merging difficulty and the most superframe time as the merging reference BG, and all the devices of the other BG.
  • the combining weights proposed by the embodiments of the present invention are specifically described.
  • the number of devices that can be detected by a device in the network is called the combining weight of the device, and the device may receive the beacon frame by receiving the beacon calculation.
  • the BPOIE field value is calculated.
  • the merging weight of a device refers to the number of devices included in the two-hop communication range of the device, including the device itself, and the maximum value of the merging weights of all the devices of the BG is called the BG.
  • the combined weights is the combined weights.
  • the embodiments of the present invention may use the defined ASIE (Application-Specific Information Element) to combine the weights of the foregoing, the BPST of the device itself, and the combined weights of other devices recorded by the device, the external BPST, the beacon slot number, and the like. Transfer between devices.
  • ASIE Application-Specific Information Element
  • ASIE Application-Specific Information Element
  • ASIE is one of many IEs, which can carry a certain amount of data information for a specific application requirement.
  • ASIE The format specification of ASIE is shown in Table 1.
  • the ASIE contains two important fields: ASIE identifier and application-description data.
  • the ASIE identifier indicates a special application, which can be set to any integer between 0 and 255.
  • the application-description data is the data carried in the ASIE.
  • the specific format and usage rules can be defined by the ASIE user.
  • the packet is transmitted in a beacon frame sent by the device in stages.
  • ASIEs There are two different ASIEs to achieve multi-BGs coordinated merging. One is used to obtain the merging weights of each BGs before BGs merging, and the other is used in the BGs merging process to determine the target synchronous BG of each BGs, where the target synchronizes BG. It refers to the destination BG that a BG is ready to relocate the beacons of all its own devices.
  • the ASIE identifier of the first type of ASIE (for obtaining the combined weight of each BGs) is set to 0, which is called BG weight IE; the second type of ASIE (for determining the target synchronization BG of each BGs)
  • the ASIE identifier is set to 1, which is called BG merge IE.
  • the description data is specified as 1 byte, and can be any integer between 0 and 100. Other values are reserved.
  • each BG obtains the combined weights of each BG.
  • the specific operation methods are as follows:
  • the device calculates its own combining weight, and includes the BG weight IE when transmitting the beacon in the next super frame, and its BG weight IE application - Indicates that the data subdomain value is the consolidation weight of the device.
  • the device in the BG detects that the beacon of the neighboring device includes the BG weight IE, and the beacon frame sent by the device last contains the BG weight IE, the device compares the BG weight included in the beacon of the adjacent device.
  • the application of the BG weight IE contained in the IE and the beacon sent by itself - describes the data sub-domain value. If the value of the neighboring device is larger, the device updates its own application - indicating that the data sub-domain value is in the adjacent device. Value If the value of the neighboring device is smaller, the device retains its own value.
  • BG weight IE is included in the beacon frame until the BG listens to the alien beacon and turns on the multi-BPs coordination merge process.
  • Superframe 1 In BG1, devices A, B, C, D, E, F, G, and H calculate their own combined weights, and the calculation results are 3, 5, 7, 3, 6, 4, 3, 5 respectively.
  • the devices in the two-hop range of device A have three devices A, B, and C, so the combined weight of device A is 3, and the device C has two hops.
  • the device has 7 devices A, B, C, H, D, E and F, so the device C has a combined weight of 7, and so on. They will include the BG weight IE when sending the beacon in the superframe.
  • its application-description data sub-domains take values of 3, 5, 7, 3, 6, 4, 3, and 5, respectively.
  • Superframe 2 Device A in BG1 detects that the beacon of neighboring device B contains the BG weight IE, and device A updates the application of the BG weight IE contained in its own beacon - the data subfield value is 5; Listening to the neighboring device, the beacon of C contains the BG weight IE, and the device B updates the application of the BG weight IE included in the beacon - the data subfield value is 7; the device C detects the neighboring device ⁇ E, The beacon of H contains the BG weight IE, and the device retains the application of the BG weight IE included in its own beacon - the data subfield value is 7, the device D, E, F, G, H and so on, and finally the device in BG1 The application of BG weight IE when B, C, D, E, F, G, H transmit beacons indicates that the data subfields are 5, 7, 7, 5, 7, 6, 4, and 7, respectively.
  • the principle of the embodiment of the present invention is simply described in an intuitive manner, so that the device only uses the device combining weights in the detected nearest neighbor device beacon information.
  • the device can detect not only the beacon of the nearest neighbor device, but also the device A can detect not only the beacon of the device B but also the device C.
  • Beacon, in superframe 2 device A can already update its own device combining weight according to the combining weight in the beacon of device C, and update to the maximum combining weight 7, so it can be understood that the actual operation process
  • the speed at which BG merge weight detection is actually performed using embodiments of the present invention will be faster than described herein.
  • Superframe 3 The devices A, B, C, D, E, F, G, H repeat the operation in the previous superframe 2, and the application containing the BG weight IE when transmitting the beacon - the description data subfield is respectively taken as 7 , 7, 7, 7, 7, 6, and 7.
  • Superframe 4 The device A, B, C, D, E, F, G, H repeats the operation in the previous superframe 3, and the application containing the BG weight IE when transmitting the beacon - the data subfield is respectively determined to be 7 , 7, 7, 7, 7, 7, 7, 7;
  • the application-description data subdomain of the BG weight IE of all devices in BG1 is unified into the merge weight of BG1 (7).
  • the devices A, B, C, D, E, F, G, H transmit the beacons containing the BG weights IE application - indicating that the data subdomain stops updating at 7, ie 7 is BG1
  • the weights are combined, and the information is included in the BG weight IE included in all device transmission beacons in BG1.
  • BG2 and BG3 in Figure 4 calculate the BG merge weights in the same way as BG1, and will not be described here. Only the calculation results are given.
  • the merge weight of BG2 is 2.
  • the merge weight of BG3 is 8.
  • Step S701 The device in each BGs removes the BG weight IE, includes or modifies the BG merge IE in the beacon frame sent by itself. Enable each device in each BG to obtain the combined weight information of all BGs, the BPST of other BGs, and the corresponding highest Information such as the occupied beacon slot number, so that a BG with the largest combined weight can be selected as the reference BG according to the combined weight information, and other BGs are merged thereto. Because the devices are in different locations in the BG, if some devices can receive foreign beacons, some devices cannot receive external beacons within the BG, and can only receive beacons of adjacent devices.
  • the device A records the application of the BG weight IE-description data sub-domain value (that is, the merge weight of the BG to which the foreign beacon belongs), and the external BPST. And the highest occupied beacon slot number information in the external BP:
  • BG merge IE application - the data subdomain is set to:
  • the 4 bytes of the first data segment are set to: The first byte is set to the merge weight value of the BG where device A is located, the second and third bytes are set to the BPST of the BG where device A is located, 4 bytes are set to the highest occupied beacon slot number - 1 in the BP of the BG where device A is located;
  • the 4 bytes of the 2nd data segment are set to:
  • the first byte is set to the merge weight value of the BG to which the foreign beacon belongs, and the 2nd and 3rd bytes are set to the external BPST, 4th.
  • the number of bytes is set to the highest occupied beacon slot number in the outer BP;
  • the last byte is set to 9.
  • the purpose of including this byte in the BG merge IE is the same as in the technical solution.
  • the BP Move Countdown subfield in the BP Switch IE has a similar countdown function.
  • beacon frame sent by device A last time contains a BG merged IE
  • device A continues to include the BG merged IE when transmitting the beacon in the next superframe, but needs to update the application of the BG merged IE-description data. area.
  • Device A will receive the incoming alien
  • the information recorded in the beacon is updated in the specified format to be added to the BG merged IE application - indicating the free data segment reserved for the data subfield, and the last 1 byte is reset to 9.
  • the device Based on the BG merge IE included in the alien beacon, the device records the application of the BG merged IE - indicating the five data segment information contained in the data subfield.
  • BG merge IE application - the data subdomain is set to:
  • the 4 bytes of the first data segment are set to: The first byte is set to the merge weight value of the BG where device A is located, the second and third bytes are set to the BPST of the BG where device A is located, 4 bytes are set to the highest occupied beacon slot number - 1 in the BP of the BG where device A is located;
  • the device A sequentially compares the five data segment information in the application-description data of the BG merged IE included in the recorded foreign beacon with the first data segment, respectively, if the recorded data segment is all 0s or 2nd sums If the 3 bytes are the same as the 1st data segment, the recorded data segment information is not added to the application-description data subfield of the BG merged IE; otherwise the recorded data segment information is added to the BG merged IE application - Describe the subsequent data segments of the data subdomain.
  • beacon frame sent by device A last time contains a BG merged IE
  • device A continues to include the BG merged IE when transmitting the beacon in the next superframe, but needs to update the application of the BG merged IE-description data. area.
  • the device A sequentially compares the five data segment information in the application-description data of the BG merged IE included in the recorded foreign beacon with the data segment of the BG merged IE of the device A, if the recorded data segment is all 0s or The 2nd and 3rd bytes are the same as the data segment of the BG merged IE of the device A, and the recorded data segment information is not added to the application-description data subfield of the BG merged IE of the device A; otherwise the recorded data segment information Added to device A's BG merged IE Application - Describes the subsequent free data segments of the data subdomain.
  • the national device A detects the beacon of the neighboring device, and the beacon of the neighboring device includes the BG merged IE:
  • Device A records the application of the BG merged IE contained in the beacon detected - describes the information of the 5 data segments contained in the data subfield.
  • beacon frame sent by device A last time contains BG weight IE
  • device A does not include BG weight IE when transmitting beacon in the next super frame, but includes BG merge IE.
  • BG merge IE application - the data subdomain is set to:
  • the 4 bytes of the first data segment are set to: The first byte is set to the merge weight value of the BG where device A is located, the second and third bytes are set to the BPST of the BG where device A is located, 4 bytes are set to the highest occupied beacon slot number - 1 in the BP of the BG where device A is located;
  • (b) Device A sequentially compares the recorded five data segment information with the first data segment, and if the recorded data segment is all 0s or the 2nd and 3rd bytes are the same as the first data segment, then The recorded data segment information is not added to the application-description data subfield of the BG merged IE; otherwise the recorded data segment information is added to the subsequent data segment of the application-description data subdomain of the BG merged IE.
  • the beacon frame sent by device A last time contains a BG merged IE
  • device A continues to include the BG merged IE when transmitting the beacon in the next superframe, but needs to update the application of the BG merged IE-description data. area.
  • device A compares the recorded five data segment information with the data segment of device B's BG merge IE. If the recorded data segment is all 0s or the 2nd and 3rd bytes are the same as the data segment of the BG merged IE of the device A, the recorded data segment information is not added to the application-description data of the BG merged IE of the device A. In the domain; otherwise the recorded data segment information is added to the application of the BG merge IE of device A - indicating the subsequent free data segment of the data subdomain.
  • the application of the BG merged IE - indicates that the last byte of the data subfield is decremented by one.
  • all BGs devices in the network include BG merged IEs in the beacons sent by themselves, and the BG merged IE application-description data subdomain
  • the data segment in the network contains the combined weight of each BGs in the network, and the beacon slot number information of the highest occupied BPST and BP. Based on this information, multiple BPs can be coordinated and merged.
  • Step S702 Each BGs determines a target synchronization BG, and the device in the BGs adjusts the BPST to relocate its own beacon. That is, all devices in the BGs determine the BPST offset and beacon slot offset information relative to the target synchronization BG that is required when relocating the beacon.
  • BG combined IE - Describe all data segment information contained in the data subfield, determine its own BPST offset and beacon slot offset information, and determine the method by: Comparing the first byte data of 5 data segments, select The BG represented by the data segment with the largest value is used as the target synchronization BG of each BGs. The devices in each BGs relocate their own beacons to the BP of the target synchronous BG to form a new BP. The BPST offset of the device is the first.
  • the beacon slot offset of the device the sum of the 4th byte data of all data segments satisfying the condition that the 1st byte data value is greater than the 1st byte data value of the 1st data segment (ie All consolidation weights are greater than the BG of the device BP significant weight BGs highest occupied beacon slot number 1 and after).
  • the beacon slot offset of the device is selected as long as the beacons of the merged devices do not collide on the time slots, and the method selected by the embodiment of the present invention—all merges
  • the sum of the highest occupied beacon slot number-1 of the BP of the BGs whose weight is greater than the BG of the device is effective -
  • the BP of the BP is used, but it can be understood that other device beacon slot offsets can be selected, such as the highest occupied beacon of the BP of all BGs whose combined weight is greater than the BG of the device.
  • the sum of the slot numbers, as long as the BS of the beacon after the merged device is selected does not generate a communication collision.
  • each BG obtains its own.
  • the merge weight for example, the merge weight of BG 1 is 7, the merge weight of BG 2 is 2, and the merge weight of BG 3 is 8.
  • the combination between BG1, BG 2 and BG 3 will be described in detail below.
  • each device in the BG 1 can know the following information: BG 1 merge weight, BPST1, BP1 The highest occupied occupied beacon slot number; the combined weight of BG 2, the highest occupied beacon slot number in BPST2, BP2; the combined weight of BG 3, the highest occupied beacon slot number in BPST3, BP3.
  • each device in the BG 1 can know which BG has the largest combining weight according to the above information, so that it is the merging reference BG.
  • the combining weight of the BG 3 is the largest, so the BG3 is used as the merging reference BG.
  • BG 1 and BG 2 are synchronized with BPST3 of BG 3 to relocate their beacons. This embodiment includes the following steps:
  • Step S801 the device D in the BG 1 receives the foreign beacon in the BG 2, the foreign beacon includes the BG weight IE, and the beacon frame sent by the device D last time includes the BG weight IE, and the device D is in the next
  • the BG weight IE is not included in the superframe when the beacon is transmitted, but the BG combined IE is included.
  • BG merge IE application - the data subdomain is set to The first and second data segments respectively indicate the information of BG 1 and BG 2, and the remaining three data segments are all 0, and the last 1 byte is 9.
  • devices A and E in BG1 receive the alien beacon in BG3, and the foreign beacon includes the BG weight IE, and the beacon frame sent by the device A and E last time contains the BG weight IE, then the device A, E does not include the BG weight IE when transmitting the beacon in the next superframe, but includes the BG combined IE.
  • the application of the BG combined IE of the devices A and E - the data sub-domain is set to indicate that the first and second data segments respectively indicate the information of BG 1 and BG 3, and the remaining three data segments are all 0, and the last one byte is 9.
  • step S802 device B detects that the beacon of the neighboring device A includes the BG merged IE, and the device C and F detect that the beacon of the neighboring device E includes the BG merged IE, and the device H detects the neighbor.
  • the beacon of device D contains BG combined IE, and the device
  • beacon frames contain BG weight IE, then device B,
  • the devices B, C, F, and H do not include the BG weight IE when transmitting the beacon in the next superframe, but include the BG merge IE.
  • the application of the BG combined with the IE of the devices B, C, F, H - the setting of the data subdomain is different: the devices B, C, F are set to the first and second data segments respectively indicating the information of BG1 and BG3, and the rest The three data segments are all 0, and the last 1 byte is 9; and the device H is set to the first and second data segments respectively indicating the information of BG1 and BG2, and the other three data segments are all 0, the last 1 byte. Is 9.
  • the device updates its own BG merged IE with the BG merged IE in its nearest neighbor beacon, it being understood that the device can detect its nearest neighbor beacon.
  • the beacons of other devices in a certain range can be detected. Therefore, in the specific application of the technical solution of the embodiment of the present invention, the update speed of the BG merged IE will be faster than that in this paper. The description is faster, and the description is given herein for the sake of clarity, simplicity, and convenience of the implementation of the embodiments of the present invention.
  • BG 1 By analogy, after several superframe times (the specific superframe time is determined by the network size of BG 1), all devices in BG 1 include BG merged IEs when transmitting beacons.
  • Table 2 lists the application-description data sub-domain setting changes of the BG merged IE in the beacon of each device in BG 1 during these superframe times. The values in parentheses represent respectively. (data segment 1, data segment 2, data segment 3, data segment 4, data segment 5, last 1 byte).
  • BG1 means that the 4 bytes of the data segment respectively contain the combined weight of BG1, the highest occupied beacon slot number -1 in BPST1, BP1, and the 4 bytes of the data segment of BG2 respectively contain the combined weight of BG2, BPST2
  • the highest occupied beacon slot number -1 in BP2, BG3 refers to the 4 bytes of the data segment respectively containing the combined weight of BG3, the highest occupied beacon slot number -1 in BPST3, BP3.
  • the beacon of each device in BG1 contains the application of BG merged IE - the change of the setting of the data subdomain
  • the device in the BG2 will perform the following operations.
  • each device in the BG2 can learn the following information. : BG1 merge weight, BPST1, BP1 highest occupied beacon slot number; BG2 merge weight, BPST2, BP2 highest occupied beacon slot number; BG3 merge weight, BPST3, BP3 highest occupied Beacon slot number.
  • BG1 merge weight BPST1, BP1 highest occupied beacon slot number
  • BG2 merge weight, BPST2, BP2 highest occupied beacon slot number
  • BG3 merge weight, BPST3, BP3 highest occupied Beacon slot number.
  • This embodiment includes the following steps:
  • Step S901 In the BG2, the device 1 receives the foreign beacon in the BG1, and the foreign beacon includes the BG combined IE, and the beacon frame sent by the device I last time includes the BG weight IE, and the device I is in the next superframe.
  • the BG weight IE is not included in the transmission of the beacon, but the BG combined IE is included.
  • BG merge IE application - the data sub-domain is set to the first and second data segments to indicate BG2 and BG1 information respectively. The other three data segments are all 0, and the last 1 byte is 9.
  • Step S902 the device J in the BG2 detects that the beacon of the neighboring device I includes the BG merged IE, and the beacon frame sent by the device J once contains the BG weight IE, and the device J sends in the next superframe.
  • the BG weight IE is not included, and the application including the BG merge IE and the BG merge IE indicates that the data subfield is set to indicate that the first and second data segments respectively indicate BG2 and BG1, and the remaining three data segments are all 0.
  • the last 1 byte is 9.
  • Table 3 lists the beacons of each device in BG2 during several superframe times.
  • the application containing BG combined IE - describes the setting change of the data sub-domain, the values in parentheses represent (data segment 1, data segment 2, data segment 3, data segment 4, data segment 5, last 1 byte).
  • BG1 refers to the 4 bytes of the data segment respectively containing the combined weight of BG1, the highest occupied beacon slot number in BPST1, BP1, and BG2 and BG3 are similar.
  • the beacon of each device in BG2 contains the application of BG merged IE - the change of the setting of the data subdomain
  • the beacons sent by all devices in BG2 after 6 superframe times also include the BG merged IE, and the application of the BG merged IE indicates that the data segment in the data subdomain contains each BGs.
  • BG2 Based on the information of the highest occupied beacon slot number in the merge weight, BPST and BP, BG2 can complete multi-BPs coordination and merge based on this information.
  • the device in the BG3 will perform the following operations. As shown in FIG. 10, it is a beacon interaction process in the BG3 in the embodiment of the present invention. After the following process, each device in the BG3 can learn the following information. : BG1's merge weight, BPST1, BP1's highest occupied beacon slot number; BG2's merge weight, BPST2, BP2 High occupied beacon slot number; BG3 merge weight, BPST3, BP3 highest occupied beacon slot number. In this way, each device in the BG2 can know which BG has the largest combined weight according to the above information, thereby relocating its own beacon with the merged reference BG.
  • This embodiment includes the following steps:
  • step S1001 the device K in the BG3 receives the foreign beacon in the BG1, and the foreign beacon includes the BG combined IE, and the beacon frame sent by the device K last time includes the BG weight IE, and the device K is in the next superframe.
  • the BG weight IE is not included in the transmission of the beacon, but the BG combined IE is included.
  • BG merge IE application - the data sub-domain is set to the first and second data segments respectively indicating BG3 and BG1 information, the other three data segments are all 0, and the last one byte is 9.
  • device N receives the alien beacon in BG1
  • the foreign beacon includes the BG combined IE
  • the beacon frame sent by device N last time contains the BG weight IE
  • device N is in the next superframe.
  • the BG weight IE is not included in the transmission of the beacon, but the BG combined IE is included.
  • Application of BG merge IE - The data subfield is set to indicate that the first and second data segments respectively indicate the information of BG3 and BG1, and the other three data segments are all 0, and the last one byte is 9.
  • Step S1002 In the BG3, the device L detects that the beacon of the neighboring device K and the ⁇ includes the BG combined IE, and the beacon frame sent by the device L last time includes the BG weight IE, and the device L is in the next super frame.
  • the BG weight IE is not included in the transmission of the beacon, but the application including the BG combined IE and the BG combined IE indicates that the data subfield is set to the first and second data segments respectively indicating the information of BG3 and BG1, and the remaining three data segments are all It is 0 and the last 1 byte is 9.
  • the devices M, 0, P, Q, and R hear that the beacon of the neighboring device N includes the BG merged IE, and the devices M, 0, P, Q, and R are sent in the beacon frame.
  • the device M, 0, P, Q, R does not include the BG weight IE when transmitting the beacon in the next super frame, but includes the BG merge IE, the BG merge IE application - the description data sub-domain setting
  • the information of BG3 and BG1 is indicated for the first and second data segments respectively, and the remaining three data segments are all 0, and the last one byte is 9.
  • Table 4 lists the application-description data sub-domain setting changes of the BG merged IE in the beacon of each device in BG3 in several superframe time, the values in parentheses Represented separately (data segment 1, data segment 2, data segment 3, data segment 4, data segment 5, last 1 byte).
  • BG1 refers to the 4 bytes of the data segment respectively containing the combined weight of BG1, the highest occupied beacon slot number in BPST1, BP1, and BG2 and BG3 are similar.
  • the beacons sent by all devices 10 in BG3 after 6 superframe times also include the BG merged IE, and the application of the BG merged IE indicates that the data segments in the data subfield contain each Based on the combined weight of BGs, the highest occupied beacon slot number information in BPST and BP, BG3 can complete multiple BPs based on this information. Tune the merger.
  • all devices of BG1, BG2, and BG3 can obtain the combined weights of BG1, BG2, and BG3, BPST, and the highest occupied beacon slot number, and relocate according to the above information. Beacon.
  • the application of the BG merged IE included in the beacon frame sent by the device C, H - the last byte of the data subfield is reduced to 0, the application of the device C - the data subfield For (BG1, BG3, BG2, 0, 0, 0), the application of the device H - the data subfield is (BG1, BG2, BG3, 0, 0, 0), then the device C, H determines that the BG3 is the target synchronous BG.
  • the calculated BPST offset is 20ms and the beacon slot offset is 7.
  • the application of the BG merged IE contained in the beacon frame sent by the devices B, D, E - indicates that the last byte of the data subfield is reduced to 0, and the application of the device B, E -
  • the data subfield is (BG1, BG3, BG2, 0, 0, 0)
  • the application of device D - the data subfield is (BG1, BG2, BG3, 0, 0, 0)
  • the devices B, D, E It is determined that BG3 is the target synchronization BG, and the calculated BPST offset is 20 ms and the beacon slot offset is 7.
  • the application of the BG combined IE contained in the beacon frame sent by the devices A, F, I, N - indicates that the last byte of the data subfield is reduced to 0, the devices A, F Application - Description
  • the data subfield is (BG1, BG3, BG2, 0, 0, 0)
  • the application of device I - the data subfield is (BG2, BG1, BG3, 0, 0, 0)
  • the application of device N - If the data subfield is (BG3, BG1, BG2, 0, 0, 0), then devices A, F, I, and N determine that BG3 is the target synchronization BG, and devices A and F calculate the BPST offset to 20 ms.
  • the combined result of BP1, BP2 and BP3 is BP, as shown in FIG.
  • the embodiment of the present invention only takes a total of 16 superframe times, whereas the prior art takes 27 superframe times. And the time during which the network data communication may be interrupted is reduced to 6 superframe times in the 16 superframe time spent, and the prior art may be timed by the terminal for 9 superframe times. Therefore, it can be seen that the embodiments of the present invention can not only ensure that all devices of multiple BGs will eventually synchronize to the same BPST, but also ensure that the multi-BP merge process takes the shortest time and the network communication interruption time is the least, thereby greatly improving the performance of the network.
  • FIG. 12 it is a structural diagram of a merging system of a multi-beacon group according to an embodiment of the present invention.
  • the system includes at least two BGs, a first BG and a second BG, and the device 1 in the first BG is configured to receive And recording the merge weight and the beacon parameter of the second BG, and sending the merge weight and the beacon parameter of the second BG to other devices in the first BG; and combining the weight and the first BG
  • the target parameter is sent to the device 2 in the second BG; the device 2 in the second BG is configured to send the combined weight and beacon parameters of the second BG to the device 1 in the first BG, and receive and Recording the merge weight and the beacon parameter of the first BG, and transmitting the merge weight and the beacon parameter of the first BG to other devices in the second BG; in the first BG and the second BG After all the internal devices record the combined weights and beacon parameters of the first BG and the second BG, all the devices in the first BG and the
  • the device uses the BG merge IE application-description data to reduce the last byte of the data from 9 to 0 for synchronization. It is understood that a suitable value can be preset for counting down. As long as the appropriate value is reduced to 0, the structure of each BG is no longer changed, and the parameter information required for each combination has been fully transmitted, and the requirements are met. .
  • the device 3 includes an external beacon receiving module 31 for receiving an external beacon of an external BG, where the external beacon carries the combined weight of the external BG. a beacon parameter of the external BG; the record sending module 32 is configured to record the merge weight and the beacon parameter of the external BG and carry the combined weight and beacon parameter of the external BG to be recorded in the beacon for transmission;
  • the reference BG selection module 33 is configured to determine whether to use the external BG as the merge reference BG according to the received merge weight of the external BG;
  • the merge module 34 is configured to merge the merge reference BG selected by the reference BG selection module 33.
  • the information carried by the foreign beacon includes a BG weight IE or a BG combined IE, and the BG weight IE or the BG combined IE includes the combined weight of the external BG and the beacon parameter of the external BG.
  • the device 3 further includes: the merge weight calculation module 35 is configured to calculate the merge weight of the device 3 itself, and the merge weight is the number of devices included in the two-hop communication range of the device 3; the BG weight IE sending module 36 is configured to pass the BG weight The IE sends the calculated merge weights of its own.
  • the device 3 further includes: a BG weight IE receiving module 37 is configured to receive a merge weight of a neighboring device sent by the neighboring device; and a merge weight determining module 38 is configured to determine a merge of the neighboring devices received by the BG weight IE receiving module 37. Whether the weight is greater than the merge weight of the device 3, if the merge weight of the neighboring device is greater than the merge weight of the device 3, the merge weight in the own BG weight IE is updated to the merge weight of the neighboring device 3; If the merge weight is smaller than the merge weight of the device 3, the device 3 maintains the merge weight in the own BG weight IE.
  • the device 3 further includes: a BG merged IE generating module 39, configured to generate a BG merge IE of the device 3 according to the merge weight of the external BG and the beacon parameter, where the BG merge IE carries the merge weight and the beacon parameter of the BG to which the device 3 belongs
  • the BG merging IE sending module 40 is configured to send the BG merging IE generated by the BG merging IE generating module 39 to the external BG and the neighboring device in the BG. give away.
  • the device 3 further includes: a BG merged IE receiving module 41, configured to receive a beacon sent by the neighboring device, where the beacon carries a BG merged IE of the neighboring device; and the BG merges the IE update module 42 And a BG merge IE for updating the device 3 itself according to the BG merged IE of the neighboring device received by the BG merge IE receiving module.
  • a BG merged IE receiving module 41 configured to receive a beacon sent by the neighboring device, where the beacon carries a BG merged IE of the neighboring device
  • a BG merge IE for updating the device 3 itself according to the BG merged IE of the neighboring device received by the BG merge IE receiving module.
  • the BG merge IE update module 42 includes: the comparison submodule 421 is configured to compare the content of the BG merged IE of the neighboring device with the content of the BG merge IE of the device 3 itself; the recording submodule 422 is configured to: The BG merged IE content of the neighboring device and the BG merged IE content of the device 3 itself are recorded in the BG merged IE of the device 3 itself.
  • the merge weight of each BG is set, and the merge weight indicates the difficulty of the BG to merge with other BGs.
  • the merge weight of the BG to be merged needs to be considered, and the BG with the largest merge weight is selected.
  • the consolidation reference BG the other BGs merge to the selected consolidation reference BG. Therefore, it can ensure that the multi-BP integration process takes the shortest time and the network communication interruption time is the least, which can greatly improve the performance of the network.
  • the present invention can be implemented by hardware or by software plus a necessary general hardware platform.
  • the technical solution of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including several The instructions are for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention.

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Abstract

L'invention porte sur un procédé pour fusionner de multiples groupes de balises, comprenant au moins deux groupes de balises (BG), le premier BG et le second BG, qui comprend concrètement les opérations suivantes : le premier BG et le second BG interagissent entre eux et obtiennent le poids de fusion de partenaire et un paramètre de balise ; le premier BG et le second BG sélectionnent le BG qui a le plus fort poids de fusion en tant que BG de référence de base de fusion, et la fusion est accomplie sur la base du BG de référence de base de fusion. Par réglage du poids de fusion de chaque BG, le poids de fusion représente le niveau difficile et aisé avec lequel le BG est fusionné à l'autre BG, le poids de fusion du BG devant être fusionné est considéré pendant que les BG sont fusionnés, et en sélectionnant le BG qui a le plus fort poids de fusion en tant que BG de référence de base de fusion, les autres BG sont fusionnés avec le BG de référence de base de fusion sélectionné, de telle sorte que le mode de réalisation de la présente invention peut assurer que le temps en coût du processus de fusion de multiples BP est le plus court, le temps d'interruption de la communication réseau est le plus court, et ainsi améliorer nettement les performances de réseau.
PCT/CN2008/073499 2007-12-13 2008-12-12 Procédé, système et appareil pour fusionner de multiples groupes de balises Ceased WO2009074118A1 (fr)

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