TW548935B - Communications protocol for wireless LAN harmonizing the IEEE 802.11a and ETSI HiPerLAN/2 standards - Google Patents

Abstract

A unified communications protocol for wireless local area networks (WLANs) which provides for the fair co-existence of the IEEE 802.11a (""11a"") and HiPerLAN/2 (""HL2""), broadband communications standards. Wireless network devices (MTs) operating in accordance with 11a and HL2 may co-exist without interference by partitioning a 2 ms periodic time domain, based on the HL2 standard, into a first slice for use by 11a MTs and a slice for use by HL2 devices. An Arbitrator entity (ARB) broadcasts the time slices, either once every periodic time domain, or periodically at an interval which is greater than the periodic time domain. Guard periods are introduced between the two slices to prevent overlapped operation of E-MTs and M-MTs. The 11a and HL2 time slices may be substantially equally portioned, or may be unequally allocated based on activity of the E-MTs and M-MTs. A small fragment size may be forced on the data frames of the E-MTs to prevent their transmission outside of the 11a time slice. In an embodiment of the invention, a first access point (E-AP) is provided for handling communication with the E-MTs, and a second access point (M-AP) is provided for handling communications with the M-MTs. A communications link is provided between the E-AP and the M-AP, and the Arbitrator entity (ARB) may be situated in either of the E-AP or the M-AP. In another embodiment of the invention, a unified access point (U-AP) is provided for communicating with the E-MTs and the M-MTs. In this manner, convergence is provided between 11a and HL2, providing users with the best of both worlds, e.g., full interoperability, QoS and co-existence.

Description

548935 A7 B7 V. Description of the Invention (1) [Field of Invention] The present invention relates to wireless communication, and more specifically, it relates to a communication protocol (standard) for wireless local area network (WLAN) applications. 1 a standard and the European Telecommunications Standards Institute HiPerLAN / 2 standard are considered. [Background of the Invention] A local area network (LAN) is a network of independent computers, which is usually limited to a geographic area, such as a single building or a school campus. LANs can be as small as three computers, or hundreds of computers often used by thousands of people. The development of standard networking protocols and the media has led to the worldwide expansion of LANs in business and education organizations. Ethernet is the most common physical layer LAN technology used today. The Institute of Electrical and Electronics Engineering (IEEE) defines the Ethernet standard as IEEE Standard 802.3. This standard defines the role of the architecture Ethernet and indicates how the components in the Ethernet interact with each other. By complying with the IEEE standard, network devices and network protocols can communicate effectively. Ethernet uses Carrier Sense Multiple Access (CSMA / CD) with collision detection. When an Ethernet station was preparing to transmit, it detected that a signal was present on the cable. If no signal appears, the station starts to transmit, however, if a signal appears, the station will delay transmission until the cable is not used. If two stations detect an idle cable and transmit signals at the same time, a collision occurs. The two colliding stations will stop transmitting for a randomly selected time again. If the collision occurs again, the time period is doubled, and if the collision occurs repeatedly, an error is reported. This paper size applies to China National Standard (CNS) A4 (210X297 mm) Γ4Ί (Please read the precautions on the back before filling this page). 衣衣 _

* 1T Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 548935 A7 B7 V. Description of Invention (2) The “ether” system of Ethernet is not limited to only one media type. Copper cables, optical cables, and radio waves can also be used. A wireless LAN (WLAN) is a data transfer system designed to provide location-independent network access between computing devices by using a wireless wave instead of a cable infrastructure. The initiative and advantages gained by WLAN are increased mobility. It is not restricted by the traditional network connection, there is no restriction on the free movement of network users and the LAN can be accessed from almost any place. A wireless LAN provides both the connectivity and convenience of a wired LAN without the need for expensive wiring or rewiring. The 5 billion Hertz (GHz) band is a band of particular interest for high frequency WLAN products. Due to the clean and wide spectrum, the 5GHz band has attracted a lot of attention because it completes the wider public acceptance of wideband WLAN products. In the United States, the 5GHz U-NII (Unlicensed National Information Infrastructure) frequency band extends from 5.15GHz to 5.825GHz and is divided into three parts (bands), which all have different licensed EIRPs (effective isotropic radiated power )value. The 200 mW band provides in-building operation. The one-watt band allows campus or small community services. The 4 watt band allows service for approximately 10 kilometers. The 5 G Η z band is open in Europe, the United States and Japan. The current spectrum allocation at 5GHz includes 455MHz in Europe, 300MHz in the United States and 100MHz in Japan. Two WLAN standards (protocols) for 5GHz have appeared, IEEE802.1 1a (hereinafter referred to as "802 · lΓ" or "lla") and HiPerLAN / 2 (hereinafter referred to as "HL2"). The common point of view in this technology is two Standards compete with each other. Ethernet-based 11a standards are particularly suitable for business environments, while multimedia HL2 standards are particularly suitable for home environments. Because the industry has been through the past (please read the precautions on the back before filling out this page) ) Clothing. Order printed by the Intellectual Property Bureau of the Ministry of Economy ’s Consumer Cooperatives. The paper size is applicable to the Chinese National Standard (CNS) A4 (210X297 mm) -5-548935 A7 B7 V. Description of the invention (3) Experiential learning, competition The uncertainty and interoperability of standards and standards adopted may negatively affect the circulation of products. (Please read the notes on the back before filling out this page.) Specific agreement definitions and abbreviations 11a and HL2 use their own definitions and abbreviations. Therefore, It is beneficial for the purpose of this document to establish a common proper noun as follows: Ethernet element 11a element can be expressed as Ethernet element multimedia element HL2 element can Expressed as the ability of multimedia components to coexist two wireless components, each component conforms to a different protocol at the same frequency, the ability to operate adjacent wirelessly without interfering parts can interoperate two wireless networks, each component cooperates with a different protocol, The ability to exchange information via a third component can fully interoperate the two wireless networks. Each component has a different protocol to directly exchange information. The name is used to describe the Intellectual Property Bureau of the Ministry of Economic Affairs in the 11a and HL2 standards. The employee consumer cooperative prints the so-called "base station". With reference to the present invention, the following prefixes will be used. E · AP Ethernet access point (in conjunction with 11a noun-AP / PC) M-AP multimedia access point (with HL2 Noun-AP / CC coordination) U-AP unified access point (a "innovation" noun) This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -6-548935 A7 B7 V. Description of the invention (4 Mobile terminal

E-MT This term is used to describe all wireless network components except access points, fixed terminals included in 11a and HL2 standards. With reference to the present invention, the following prefixes will be used. Aether mobile terminal (cooperating with 11a noun-STA) M-MT multimedia mobile terminal (cooperating with HL2 noun-MT) printed by the consumer property cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs U-MT unified mobile terminal (a "innovation" noun ) IEEE802.1 1 a (11 a) The IEEE 802.1 1 (lla) standard is a broadband communication standard for WLAN, and defines two pieces of equipment, a wireless station (STA, here "MT"), which It is usually a personal computer (PC) equipped with a wireless network interface card (NIC) and an access point (AP), which is a bridge between wireless and wired networks. An AP usually includes a radio, a wired network interface (such as Ethernet), and bridging software that conforms to the IEEE802.1d bridging standard. As a base station for wireless networks, the AP gathers access from most MTs to the wired network. The wireless station is an 802.1 1 PC card, PCI, or ISA NIC, or a solution built into a non-PC customer (eg 802.1 1 is the main phone handset). The 11a standard defines two modes of operation-a basic mode and an ad-hoc mode. In the basic mode, the wireless network constitutes at least one AP connected to the wired network foundation and a group of MTs. This architecture is called Basic Service Group (BBS). An extended service set (ESS) is a group of two or more BBSs forming a single network. Because most cooperative wireless LANs require access to wired LAN services (file servers, printers, Internet links), they typically operate in basic mode. (Please read the notes on the back before filling in this page) The size of the paper used for this edition applies to the Chinese National Standard (CNS) A4 (210 X 297 mm) -7- 548935 A7 ______B7_ V. Description of the invention (5) ad-hoc mode (Also known as peer-to-peer mode, or standalone basic service group, IBS) is simply a group of wireless stations (MTs) that communicate with each other directly without having to use an AP or connect to a wired network. This mode is useful to quickly and easily set up a wireless network where the wireless infrastructure does not exist or does not require services, such as in a hotel room, conference center, or airport or wired network access Prohibited (for example, consultants at clients). The 11a standard includes a physical (PHY) layer and a media access control (MAC) layer of the network. Generally speaking, the PHY layer handles data transmission between nodes. The MAC layer is a set of protocols that is responsible for maintaining the order of shared media usage. 11 The aMAC layer is responsible for how a wireless station (MT) is added to an access point (AP). When an MT enters the range of one or more APs, it selects an AP (also called "ksr oh basic service group") that it wants to join based on the signal strength and the packetization error rate seen. Once accepted by the AP, the MT tunes back to the wireless channel set by the AP. The MT periodically transmits all available channels to evaluate whether a different AP will provide it with better performance characteristics. If so, the MT rejoins the new AP and adjusts to the wireless channel set by the AP. Rejoining usually occurs because the MT has actually left the original AP, causing the signal to weaken. In other examples, rejoining occurs due to changes in wireless characteristics in the building, or due to high network traffic to the original access point. In the latter, this feature is called "load balancing" because its main function is to most effectively distribute the total WLAN load across the available wireless base. The MAC layer problem specific to wireless LANs is a matter of “hidden nodes”, where both stations on the opposite side of the AP can “hear” activities from the AP, but cannot hear each other due to distance or obstacles. In response to this problem, 1 1 a standard This paper size applies to Chinese National Standard (CNS) A4 specification (210X297 mm) -8 · (Please read the precautions on the back before filling this page) Order the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Print 548935 A7 B7 5. Description of the invention (6) Specify an optional requirement to send / remove send (RTS / CTS) agreement on the MAC layer. When this feature is used, a transmitting station (MT) transmits an RTS and waits for an access point to answer with a CTS. Because all stations in the BSS can listen to the access points, the CTS makes them delay any desired transmission and allows the transmitting station to transmit and receive a single packet of acknowledgement without the chance of collision.

HiperLAN / 2 (HL2) HL2 is another wireless LAN standard, which includes a physical (PHY) layer, a media access control (MAC) layer, and other layers as described below. HL2 provides high-speed communication between mobile terminals (MT) and various broadband basic networks to a bit rate of 54-M bit / s. The HL2 standard depends on the cellular network topology combination with an ad-hoc network capability. It supports two basic operation modes: centralized mode and direct mode. The centralized mode is used for cellular network topology, where each wireless sub-area is controlled by an access point (AP) covering a certain geographical area. In this mode, a mobile terminal (MT) communicates with another mobile terminal (MT), or the core network communicates via an AP. The operation of this mode is mainly used in indoor and outdoor commercial applications, which must cover an area larger than the wireless detail area. Direct mode is used in ad-hoc network topology. It is mainly used in a typical private home environment. One of the wireless sub-areas covers the entire service area. In this mode, mobile terminals (MTs) in a single cell home "network" can exchange data directly. The PHY layer maps MAC protocol data units (PDUs) to PHY PDUs and adds PHY signaling, such as system parameters and headers for RF signal synchronization. Signal modulation is based on orthogonal frequency division multiplexing (OFDM), with several combinations of carrier modulation and forward error correction, which allows dealing with various channel architectures. This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page), !! Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548935 A7 __B7_ V. Description of the invention (7) (Please read the notes on the back before filling out this page) A middle layer, that is, the channel access and control (CAC) sub-layer processing requires channel access to support the sending and sending of letters and agreement operations. A virtual class irrelevant access mechanism is completed by speaking to the actions in the agreement before speaking. This mechanism (cancellation rate, non-scheduled multiple access, EY-NPMA) encoding priority level selection and competitive solution becomes a single variable-length wireless pulse forward packet data. EY-NPMA provides good residual collision rate performance to a large number of simultaneous channel competitors. The HL2 standard also includes a data link control (DLC) layer. Two gauge pins are an essential part of this DLC layer. The first is to include basic data transfer functions, which consist of error control protocols and media access control (MAC) protocols. The second specification is the radio link control (RLC) sublayer that defines the data in the control plane that is exchanged between the access point (AP) and the mobile terminal (MT). Furthermore, the two specifications are developed for home and commercial organizations for DLC. The space interface of HL2 is based on time division multiplexing (TDD) and dynamic time division multiplexing (TDMA). The HL2 standard printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs also specifies the convergence layer (CL). A CL has two main functions: it transfers higher service requests to the services provided for the DLC and converts higher-level packets with fixed or variable sizes into fixed-size DLC service data units used in the DLC. . The convergence layer has been developed for Ethernet (IP-based) applications, and the fine-grained core network is used as ATM and used in the IEEE1 394 protocol and applications. The HL2 standard defines a set of protocols (measurement and signaling) to provide support for several wireless network functions, such as dynamic frequency selection (DFS), link switching, switching, multi-beam antennas, and power control, of which The deduction system differs for specific sellers. Supported wireless network operations to allow the detailed deployment of the HL2 system to apply the Chinese National Standard (CNS) A4 specification (210X297 mm) at the full paper size -10- 548935 A7 B7 V. Description of the invention (8) ( Please read the notes on the back before filling out this page) Coverage and wide range of environments in high data rates. The system automatically assigns frequencies to each communication access point. This is performed by DFS, which allows several operators to share the available spectrum without using interference frequencies. When it comes to wireless LANs, performance is one of the most important factors. In contrast to other wireless-based systems, data traffic on the LAN has a random burst nature, which causes serious problems with regard to throughput. When quality of service (QoS) is measured, many factors should be considered. Among these factors, the topography of the terrain, that is, the height in the terrain may cause shadows, making the connection stable or impossible, an environment with many signal reflecting surfaces, an environment with many signal-absorbing surfaces, the quality of wireless devices, wireless Placement of equipment, number of stations, proximity to installation locations that generate electrical noise, etc. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs In order to cope with various changes in wireless link quality (interference and transmission conditions), the HL2 standard uses a link adaptation (LA) design. Its goal is to maintain a communication link at a low signal to interference To maintain QoS and make a trade-off between communication range and data rate. Based on the link quality measurement, the data rate of the physical layer is adjusted to the current link quality. Transmit power control is supported by mobile terminals (uplink) and access points (downlink). Uplink power control is mainly used to simplify the design of the access point receiver by avoiding automatic gain control at the access point. The main goal of downlink power control is to implement the regulatory requirements in Europe to reduce interference to other systems using the same 5GHz band. A typical HL2 MAC frame is 2 milliseconds in duration, and includes the following functions g / phase: BCH broadcast channel FCH frame channel This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) 548935 A7 B7 5 (9) Description of the invention (9) The ACH accesses the feedback channel DL and the DIL directly links the UL and the RCH random channel frequency sharing rules (FSR) 11a and HL2 standards to select the same OFDM method at the PHY layer. Therefore, the coordination of the PHY layer is equally straightforward and need not be discussed further. On the other hand, 11a and HL2 standards have been implemented in the MAC layer with many different solutions. Although the 11a standard CSMA / CA MAC is used for the optimization of wireless data communication and provides simple and field-proven solutions for wireless Ethernet and IP, the HL2 standard is supported by its built-in quality of service (QoS) support. Provides a strong answer to wireless multimedia transmission. HL2 is basically centrally controlled. It has an AP / CC to announce the time structure at each MAC frame. This is completely different from the CSMA / CA of the 11a standard. The 1 1 a is basically a design that is simple before listening. HL2 allows dynamic allocation of new frequencies (DFS) and transmitter power control (TPC). In contrast, 11a, once selected, remains operating at a single carrier frequency. Both systems use Link Adaptation (LA), which is a flexible interference-related option for modulation and coding. Both 11a and HL2 standards are intended to operate in the European license-free band 5.1..5.8GHz, and similar U-NII bands in the United States and Japan. Therefore, there is a need for a set of frequency sharing rules (FSR), or rules, to provide these two broadband communications. The paper size is applicable to China National Standard (CNS) A4 specifications (210X297 mm) -12-(Please read the precautions on the back first (Fill in this page again) Order 548935 A7 B7 printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of invention (10) Fair coexistence of standards. This issue has coexisted with IEJE802.1 1 by Mangold and others and the European Telecommunications Standards Institute HiDerLAN / 2 at the table of the second generation wireless communication at the IEEE conference in San Francisco, USA, from June 14 to 16, 2000: As mentioned in the question on the 5GHz license exempting fair resource sharing in the frequency band, this article can be described by < < http: //www.coment.rwth-aachen.de/cgi-bin/paper-download.pl? BIBID = MaHmaiWij-3Gwireless2000 & LANG = en & USER = smd > > obtained, this document is hereinafter referred to as "male gold". Male gold describes a simulation script in which one 802.1 1AP communicates with two MTs, both MTs are a few meters away from 802.1 1AP, and an approaching HL2AP communicates with two MTs, both MTs are a few meters away from the AP, the two systems They all use the same carrier to transmit their packets on the same frequency. As described therein: The 802.1 1-packet sent after the carrier sensing and ready-to-send (RTS) and division by the transmission (CTS) burst often interferes with the HL2 BCH PDU at the beginning of the MAC frame. Once the HL2 BCH is destroyed, the relevant MAC frame is lost and no traffic occurs in the uplink. This is because the BCH of HL2 is interfered by many 802.1 1 packets. Although the entire transmission period of the 802.1 1 packet is matched with the unused part of the HL2 frame, at least a small part of the load, that is, during the unused long period of the HL2 MAC frame, the BCH is often damaged. If the traffic load in the two systems is close to its maximum capacity, the HL2 system will be fully filled, the 802.1 1 system will not be able to operate and the HL2 system will reach its maximum capacity. Therefore, it can be seen that without an appropriate FSR, mutual interference will cause a difference in QoS between the two system types. Male gold also discusses possible solutions to this problem as follows. (Please read the notes on the back before filling this page). Order the paper printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and the Consumer Cooperatives. The paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) -13-548935 A7 B7 5 、 Explanation (11) (Please read the notes on the back before filling this page) In order to avoid the transmission of 802.1 1 terminal in the unused part of the HL2MAC frame, LA is applied and a modulation and coding design system Selected to fill the MAC frame as much as possible. If this method is not satisfied to completely fill the MAC frame, the AP will broadcast the system-related management information in the unused portion of the MAC frame to completely fill it and avoid an 802.1 1 terminal to start Its own transmission. Because the random access slot of RACH can be used for HL2, it may allow 802.1 1 terminal transmission, so the AP will send a negative acknowledgement (NAK) to the slot when it detects that the random access slot is not used. This can be performed by transmitting energy surges after detection of no access. There is no need for idle periods of time between the frame intervals of the 802.1 1 transmission. When HL2 needs to ensure real-time traffic, such as voice or multimedia QoS, the 802.11 system will not always interfere. Menjin proposed a transmission suppression mechanism, in which the transmission of the 802.1 1 frame will be suppressed by HL2, so that when it is operated in the HL2 environment, it will not have the opportunity to be used. Therefore, this is not a coexistence solution, it is only a way to avoid interference (HL2 can be operated, but 802.1 1 is not). Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Parallel to HiPei * LAN / 2 standardized artifacts, the Japan Multimedia Mobile Access Communication (MMAC) Association has started to develop different high-speed wireless access systems for commercial and home applications at 5GHz. One of the systems used for commercial applications in corporate and public networks is the PHY layer and DLC layer with HiPerLAN / 2. In addition, the PHY layer of the IEEE802.il standard in the 5GHz band is coordinated to the HiPerLAN / 2 layer. General dictionary The paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) -14-548935 A7 B7 V. Description of the invention (12) (Please read the precautions on the back before filling this page) Unless otherwise specified, or It can be seen from the scope of its use that any nouns, abbreviations, prefixes or scientific symbols and notes used herein have the general meaning in the technical principles of the present invention. The following dictionaries of nouns are intended to give the explanation and consistency of the previous technical documents described in this case: 3GPP 3rd Generation Partnership Project ACH Access Return Channel ACK Approved AP Access Point ATM Asynchronous Transfer Mode BCH Broadcast Channel BPSK Binary Phase Shift Keying BRAN Broadband Wireless Access Network BSS Basic Service Group CC Central Controller (HL2) CCK Complementary Code Keying CEPT / ERC European Telecommunications Management Association / European Radio Communications Association CRC Cyclic Redundancy Check CSMA / CA Carrier-Sensitive Multiple Access with Collision Avoidance Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs CSMA / CD Carrier-Sensitive Multiple Access CTS with Collision Detection Divided by DCF Distributed Coordination Function DFS Dynamic Frequency Selection DHCP Dynamic host addressing agreement DIL direct link This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -15 548935 A7 B7 V. Description of invention (13) (Please read the precautions on the back before filling this page ) DL Downlink DS Decentralized System DSSS Direct Sequence Spread Spectrum EIRP Effective Isotropic Radiated Power ESS Extended Service Group

Ethernet LAN protocol. See IEEE802.2 ETSI European Telecommunications Standards Institute FCC Federal Communications Association (USA) FCH frame channel FHSS frequency hopping spread spectrum FSR frequency sharing rules GFSK Gaussian frequency shift keying GHz GHz Hertz GMSK Gaussian minimum key shifting method HIPERLAN efficient wireless Local Area Network (HL2, H2) HL2 HiPerLAN / 2 IBSS Independent Basic Service Group Intellectual Property Bureau Employees Cooperative of Ministry of Economic Affairs Printed IEEE802.il Wireless LAN Agreement (11a) IEEE802.2 Ethernet Protocol IEEE Institute of Electrical and Electronics Engineers IETF Internet Engineering Task Group IP Internet Protocol IPSec Internet Protocol Security ISA Integration Service Architecture This paper standard applies to China National Standard (CNS) A4 specification (210X297 mm) -16-548935 A7 B7 V. Description of the invention (14 ) (Please read the notes on the back before filling this page) ISM Industry, Science and Medicine ISO International Standards Organization km km LA Link Adaptation LAN LAN LLC Logical Link Control MAC Media Access Control MIB Management Message Library MKK Wireless Equipment Inspection and Certification Association (Japan) MMAC Multimedia Mobile Access Communication ms ms MT Mobile Terminal mW Milliwatt NA V network allocation vector NIC network interface card NOS network operating system OFDM orthogonal frequency division multiplexing method Ministry of Economic Affairs Intellectual Property Bureau employee consumer cooperative printed PC personal computer PCF point coordination function PCI peripheral component connection interface bus PDU protocol Data unit PHY physical layer PPM pulse position modulation PRNG Virtual random number generator This paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297 mm) -17-548935 A7 B7 V. Description of the invention (15) QAM orthogonal amplitude modulation

QoS quality of service (please read the notes on the back before filling this page) QPSK Quadrature Phase Shift Keying RACH Random Access Channel RC4 Roche Code or Levi's Suffix RCH Random Channel RTS Ready to send (or request to make Transmission) SEA Spokesperson Electronic Deduction SNMP Simple Network Management Protocol STA Station TCP / IP Transmission Control Protocol / Internet Protocol TDD Time Division Duplexing TDMA Time Division Multiplexing TPC Transmitter Power Control UL UMTS Universal Mobile Telecommunications System U- NII Unlicensed National Information Infrastructure W Printed by the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs of the People's Republic of China Printed by WECA Wireless Ether Compatibility Alliance WEP Effective Equivalent Privacy WLAN Wireless Local Area Network [Invention Summary] What is needed now is for wireless areas The paper standard of the unified communication protocol of WLAN is applicable to the Chinese National Standard (CNS) A4 specification (210X297mm) -18-548935 A7 B7 V. Description of the invention (16) (Please read the precautions on the back before filling in this Page), it provides fair coexistence of 11a and HL2 broadband communication standards. These two incompatible standards are planned to operate in the same frequency band, resulting in incompatible products and impossible interoperability between the two environments. As the industry has learned in the past, multiple standards, product incompatibilities, and poor interoperability have provided a major obstacle to widespread public acceptance. The present invention provides such a unified communication protocol, which ensures that the two standards can coexist in a compatible and fair manner, without having to communicate with each other, and without exchanging requirements or approvals, and allows each system to protect its mobile terminal (MT) during the communication phase. Opportunities and ensure quality of service (QoS). According to the present invention, a technology is provided to combine the 11a and HL2 standards, complete the coexistence of protocols, and improve the interoperability between the two WLAN standards, thereby providing a globally coordinated and synthesized 5GHz wireless LAN solution. The principle is to combine the best of the two standards while maintaining consistency and a fairly simple solution. More broadly, the ultimate goal of the present invention is to provide a unified standard that fulfills the following conditions: Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy-complete all interoperability, where the same devices are connected and serve Home, office and public environment. Products share and share infrastructure and resources. -Transfer all required functions without sacrificing simplicity. Modern wireless LAN applications require various advanced features, including transmission of various protocols (including Ethernet, IP, IEEE 1 392, etc.), quality of service (QoS) support, and strong private support (encryption, authentication). Regulations in many countries require wireless link functionality with dynamic frequency selection and transmission power control. All these characteristics are integrated into the unified standard of the present invention, without unnecessary complexity to overload the system, and to the extent possible, this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -19- 548935 A7 B7 V. Description of the invention (17) Keep the standard use and implementation simplified. The present invention can be implemented step by step to suit the introduction of each stage. Each stage can be considered as an embodiment of the present invention. The stages are as follows: Stage 1 This stage completes the coexistence of 11a and HL2 standards with minimal development effort And part of the interoperability, and is divided into two phases: Phase 1.1 This phase is based on the original AP (E-AP & M-AP), a part of the arbitration entity (ARB) was added to one of the APs. Phase 1.2 This phase is based on a U-AP. Phase 2 This phase completes the coexistence and full interoperability of 11a and HL2 standards. Generally, in the first stage, there is a standard that is partially interoperable in different environments. The P Η Y layer is 11 a, and the M A C layer is basically a simplified version of HL2 superimposed on the basic 1 laMAC. This results in: Bureau Q os full coexistence Part interoperability Generally speaking, in the second stage, there is a common (global) standard. The PHY layer is 11a, and the MAC layer is a mixture (combination) of HL2 and 11a. This results in: Bureau Q 0S coexistence and interoperability. In the first stage (or intermediate solution), the coexistence is dynamically divided at the access point (AP), each time the network between 11a and HL2 devices. The time domain is completed between two standard rooms. Time sharing between different devices is performed by an arbitration (ARB) entity. (Please read the notes on the back before filling this page)

It is printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The paper size is applicable to the Chinese National Standard (CNS) A4 (210X297 mm) _ 2〇 · 548935 A7 B7 V. Description of the invention (18) (Please read the notes on the back first Refill this page) For example, this will allow laptop users, primarily in 11a-based environments, to connect to and work with HL2-based home networks. The stretcher did not reduce the bandwidth available on all HL2 or all 11a networks. This part is considered "partial" because ARB only controls the time slice. This can be implemented in a wireless network as: two separate APs, one for an environment, each containing an ARB entity; or an entire AP, serving two environments, and containing an ARB entity. In the intermediate solution, part of the operability can be accomplished by connecting the connection method between the lla (Ethernet-like) AP and the HL1 (multimedia) AP. These APs will bridge the environment. In the second stage (or "full solution"), there is a unified AP (U-AP) and therefore two types of wireless terminals (MT): E-MT, which is a simple Ethernet-like device, which is only Support Ethernet environment; and U-MT, which is a hybrid device, which supports multimedia and Ethernet. Because U-MT can talk to E-MT, it can achieve full interoperability. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. In the total solution, all stations (multimedia and Ethernet) are required to communicate with U-AP. For example, a laptop computer that is an Ethernet-based device may be required to connect to a home network in a multimedia environment. In this way, convergence is provided between 11a and HL2, providing the best user world, such as full interoperability, QoS, and coexistence. According to the present invention, a method for making a wireless network device (MT) operating according to two incompatible communication standards coexist without interference includes the steps of: applying a period of -21 paper standards to the Chinese National Standard (CNS) A4 specifications (21〇χ297mm) 548935 A7 _ B7 V. Description of the invention (19) (Please read the precautions on the back before filling this page) The domain division becomes the first used by the device (E_MT) operating according to the first communication standard The slice and a second slice are used by the device (M-MT) operated according to the second communication standard, and broadcast the time slice to the MT. The first communication standard mainly includes the IEEE802.il a (11a) standard, and the second communication standard mainly includes the HiPerLAN / 2 (HL2) standard. According to a characteristic of the present invention, an arbitration entity (ARB) broadcasts a time slice once in each time domain or periodically in a time period greater than the period of the surrounding time domain. (The ARB information is transmitted in a way that is less than once per cycle.) According to a feature of the present invention, a protection period is introduced between two slices to prevent overlapping operations of E-MT and M-MT. These time segments may be substantially equally divided, or may be based on the activities of the wireless network device (MT), and not equally distributed. According to a feature of the present invention, E_MT is prevented from being emitted outside the first time slice. This can be done by setting all other time slices in the time domain to be busy in the Network Allocation Vector (NAV) of the first communication standard. Employees of the Intellectual Property Bureau of the Ministry of Economic Affairs. A feature is that the data frame sent by the E-MT that is larger than the allocated time slice can be segmented for transmission in most time slices. A small segment size can be forced on the data frame of the E-MT; and a guard time (no contention period) can be provided before the second time slice, where the guard time is sufficient for the E-MT to send a small size segment . In one embodiment of the present invention, a first access point (E-AP) is provided for processing communication with the E-MT in an Ethernet environment, and a second access point (M- AP) is provided for communication with M-MT in a multimedia environment. This paper size applies to China National Standard (CNS) A4 specifications (2! 〇 × 297 mm) · 22 · 548935 A7 B7 V. Description of the invention (2) A communication link is provided between E-AP and M-AP To provide intermediate answers. (Please read the notes on the back before filling out this page.) In another embodiment of the present invention, a unified access point (U-AP) is provided to communicate with multiple (Ethernet plus multimedia) environments. E-MT and M-MT communication to provide a complete solution. Other objects, features, and advantages of the present invention will become apparent from the following description. [Brief description of the drawings] Reference is made to the following preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. The drawings are for illustration and not limitation. Although the present invention is generally described in terms of preferred embodiments, it should be understood that the description is not intended to limit the spirit and scope of the invention to these specific embodiments. The structure, operation and advantages of the preferred embodiment of the present invention will be better understood from the following description in conjunction with the accompanying drawings. Figure 1 is a sequence diagram of an embodiment of a unified agreement based on the 11a and HL2 standards, which is partially interoperable according to the present invention; printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 2 is a combination of 11a and 11a. A timing diagram of another embodiment of the HL2 unified agreement, which is fully interoperable according to the present invention; Figure 3 is a chart showing that the frame is divided into 2 equal parts according to the 2 milliseconds of the present invention, one (0.88 ms) contains Ethernet content, another (0.88 ms) contains multimedia content, and a portion (0.24 ms) is used for H2 management (H2Mgmt); Figure 4 is a chart showing a wireless communication network according to the present invention "Partial" solution, some MTs operate in a multimedia environment and other MTs operate in an Ethernet environment; and this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -23-548935 A7 B7 V. Explanation of the invention (21) Figure 5 is a chart showing a "full" solution for a wireless communication network according to one of the inventions, in which all MTs are universal MT (U-MT) operating in multiple (multimedia plus Ethernet) environments. The main components printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs are 100 unified agreement 102 11a slice 104 HL2 slice 106 DCF / PCF part 108 ARB part 110 RCH part 112 BCH B1H part 114 FCH part 116 ACH part 118 DL part 120 DIL part 122 UL part 200 Uniform agreement 202 HL2 slice 204 11a slice 206 BCH 咅 IH points 208 FCH 咅 IH points 210 ACH 咅 [H points 212 DL section 214 DIL section (Please read the back Please fill in this page for the matters needing attention) This paper size is applicable to China National Standard (CNS) A4 specification (21〇X: 297mm) -24- 548935 A7 B7 V. Description of invention (22) 216 UL part 218 DCF / PCF part Part 220 ARB (Please read the notes on the back before filling this page) 222 RCH part 400,500 Wireless communication network [Detailed description of the invention] By providing coexistence between 11a and HL2 standards (protocols), the same wireless The network can be shared by a data communication central device using the 11a protocol and a multimedia central device using the HL2 protocol for QoS support. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. The ultimate goal of the unified agreement of the present invention is to provide full interoperability between different operating environments. Individual 11a and HL2 characteristics are eliminated, which can endanger fully interoperable operations. . The 11 a standard is quite "self-interoperable. In other words, there is no" operating environment "or special considerations regarding the ability to operate any 1 ia device in an ad-hoc or basic network. The HL2 standard introduces different operations The idea of environment (or form), the ability to optimize a specific device, to operate in home, business (office) or public environment, using different operations to extend. In the "commercial" form, HL2 can be used as a A part of the cooperative network managed by ETCO and used as a wireless Ethernet network. In the "home" form, HL2 can be used for home network wiring, and data and multimedia (audio and video) applications. Channels-for example, Internet connections, wireless telephones using HL2 as the transport layer-and in these environments, a high quality of service is important. In the "public" form, HL2 can be used in airports, transit centers and hotels Among them, the application is data network access (such as in the commercial form), but it can also be UMT and other multimedia transportation. Pricing, access control and security are very common for public forms. This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm)? 25: " 548935 A7 B7 V. Description of the invention (23) (Please read the precautions on the back before filling this page) This pair The division of different environments provides a partial optimization of the device for a particular application, but at the expense of interoperability. Therefore, as a starting step towards completing the full interoperability of the device, the present invention combines Three different HL2 operation forms become a "unified" form, preferably a "home" extension based on the operating environment. This unified form supports the necessary QoS, IEEE1394, and ad-hoc network connection features, and 1 la coexistence features provided The commercial Ethernet network support is extended to avoid the need to join the commercial form. The use of this single all-inclusive operation form ensures a high degree of interoperability. According to the first basic embodiment of the present invention, a simple version of HL2 is superimposed on On the basic llaMAC, the resulting time domain is divided (sliced, allocated) between 11a and HL2 devices. For each protocol, the "first" slice of time is used by individual standards. Use, and "second" time slicing is prohibited for use by this standard. Time divisions between agreements are excluded.-An "arbiter" (ARB) entity manages and broadcasts the time slices used for each agreement, Time domain divided between 11a and HL2 slices. ARB entity can be 11a or HL2 access point (AP), a separate central controller (CC), or any wireless station (MT) in the network. Ministry of Economic Affairs The Intellectual Property Bureau employee consumer cooperative prints a 1 la device (MT) that can interpret the broadcast transmitted by the arbiter (ARB), so that no 11a device is transmitted outside the allocated 11a time slice. These periods are processed like no competition period . In the 11a time slice, generally the 11a protocol can be used, and both DCF and PCF modes can be added. A protection period can be introduced to protect the 11a and HL2 time domains to prevent overlapping operations of HL2 and 11a devices due to synchronization failures. The HL2 Central Controller (TDMA Manager, "CC") is able to interpret the broadcast information transmitted by the ARB and assign an HL2 frame, so that the HL2 device will not transmit to this paper standard applicable to the Chinese National Standard (CNS) A4 specification ( 210X297 mm] 26- 548935 at B7 V. Invention Description (24) Allocate HL2 time slice outside. Because the specific time slice allocation between 11a and HL2 domains has a great impact on the overall performance, different similar dynamic allocation and policies The main answer can optionally be added by the ARB entity to complete the allocation of sufficient resources for QoS traffic, while leaving another bandwidth for data communication traffic. The policy based on the addition of the traffic management answer will allow the user structure to limit Data communication and multimedia traffic use. When a reasonable time slice allocation policy is used, the unified agreement of the present invention will not cause significant bandwidth degradation compared to the bandwidth capabilities available under the current 11a or HL2 standards. The HL2 protocol relies heavily on the generation of a two millisecond cycle frame. On the other hand, the 11a protocol does not cause any specific cycle restrictions, as long as 11a The slices are sorted in a sufficiently close time period to avoid the retransmission of higher layer protocols due to time. Because the retransmission time must be considered, the unified protocol of the present invention uses the 2 millisecond cycle timing of the HL2 standard. Design. Figures 1 and 2 are an embodiment of the unified agreement frame structure of the present invention, which are respectively from the 11a point of view and from the HL2 point of view. It should be understood that the frame layout is an example of many possible embodiments that can be implemented. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 1 shows the ordering layout (frame structure) of the unified agreement 100 combining 11a and HL2 standards, which is partially interoperable from the 11a point of view according to the present invention. An overall periodic frame with a duration of about 2 milliseconds is divided into two slices, 11a slice 102, and subsequent HL2 slice 104. Several functions are performed between the periodic boxes as follows (and made into the following Table 1): The first part 106 of the 11a slice 102 is designated for the DCF and PCF functions, and has about 1.10 milliseconds. The second part 10 of the 10a slice 102 is designated -27. This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) 548935

A B V. Description of the invention (25) ARB function, and has a duration of about 0.06 milliseconds. The first part 110 of the HL2 slice 104 is designated for the RCH function and has a duration of about 0.06 milliseconds. The second part 112 of the HL2 slice 104 is designated for the BCH function and has a duration of about 0.06 milliseconds. The third part 114 of the HL2 slice 104 is designated for the FCH function and has a duration of about 0.06 milliseconds. The fourth part 116 of the HL2 slice 104 is designated for the ACH function and has a duration of about 0.06 milliseconds. The fifth part 118 of the HL2 slice 104 is designated for the DL function and has a duration of about 0.12 milliseconds. The sixth part 120 of the HL2 slice 104 is designated for the DIL function and has a duration of about 0.32 milliseconds. The seventh part 122 of the HL2 slice 104 is designated for the UL function and has a duration of about 0.1 6 ms. __ (Please read the precautions on the back before filling out this page) Printed slices / function milliseconds of consumer cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 1 la slice 1.16 DCF / PCF 1.10 ARB 0.06 HL2 slice 0.84 RCH 0.06 BCH 0.06 FCH 0.06 ACH 0.06 DL 0.12 DIL 0.32 UL 0.16 Table 1 This paper size applies to Chinese national standard (CNS> A4 specification (210X297 mm) -28-548935 Α7 Β7 V. Description of invention (26) (Please read the precautions on the back before filling this page) As shown in Figure 1, the 11a time slice 102 includes a "normal" DCF / PCF period 106, followed by a special ARB broadcast message 108 announcing the start and length of the following DCF / PCF period. 11a stations are not allowed to transmit Outside of the DCF / PCF period, during these periods, generally the 11a rule can be fully applied. The HL2 agreement uses the allocated bandwidth as the broadcast in the FCH information; HL2CC-HL2 traffic cannot be excluded from the HL2 slice. Example shown The system is most suitable for the 11a access point (AP). The system is used as the HL2 central controller (CC) entity and arbiter (ARB) because of the need for near synchronization between the ARB and CC entities. Figure 2 illustrates the combination 11a According to the present invention, the ordering layout (time frame structure) of the uniform agreement 200 of the HL2 standard has partial interoperability. The overall periodic frame with a duration of about 2 milliseconds is divided into two slices, one HL2 The slice 202 and a 1a slice 204 are later. Several functions are performed between the periodic boxes, as follows (and drawn as Table 2). The first part of the HL2 slice 204 printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs is Designated as the BCH function and has a duration of about 0.06 milliseconds. The second part 208 of the HL2 slice 204 is assigned to the FCH function and has a duration of about 0.06 milliseconds. The third part 210 of the HL2 slice 204 It is specified in the ACH function and has a duration of about 0.06 milliseconds. In contrast to the agreement in Figure 1, in this agreement, the RCH function is positioned at the end of the 1 ia slice. However, this is a periodic box, 11a slice The end is basically comparable to the beginning of the next HL2 slice. The fifth part 212 of the HL2 slice 204 is designated for the DL function and has a duration of about 0.12 milliseconds. The sixth part of the HL2 slice 204 Copies 2 14 Series Designation The DL function has a duration of about 0.32 milliseconds. The seventh part 216 of the HL2 slice 204 is assigned to the UL function and has a duration of 0.16 milliseconds. 29 This paper size applies the Chinese National Standard (CNS) Α4 Specifications (210X29 * 7mm) 548935 A7

7 B V. Description of the invention (27) The order of DL, DIL and UL functions is the same as that of the agreement in Figure 1. However, the DIL function has been shown to have been lengthened. In order to complete the unified form reorganization as much as possible, the DIL is used intensively. In the "home" form, the DIL can be extended. The first part 218 of the 11a slice 204 is assigned to the DCF and PCF functions and has a duration of about 1.10 milliseconds. The second part 220 of the 11a slice 204 is assigned to the ARB function and has a duration of about 0.06 milliseconds. The order of the DCF / PCF and ARB functions is the same as that of the contractor in Figure 1. Finally, after the 11a slice is finished, part 222 of the whole frame is assigned to the RCH function. (Please read the notes on the back before filling this page) Printed slices / function milliseconds HL2 slices 0.90 BCH 0.06 FCH 0.06 ACH 0.06 DL 0.12 DIL 0.40 UL 0.16 11a slices 1.04 DCF / PCF 0.98 ARB 0.06 RCH 0.06 Table 2 This paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297 mm) -30 · 548935 Α7 Β7 V. Description of the invention (28) Abbreviations in Table 1 and Table 2 (Please read the notes on the back first Please fill in this page again) DCF decentralized coordination function PCF point coordination function DL downlink UL uplink DIL direct link ACH access feedback channel BCH broadcast channel FCH frame channel RCH random channel Obviously, the unified agreement of the present invention itself "Cost" is spent by adding "management" information, which is transmitted by the ARB entity to synchronize the Ha and HL2 time slices. However, the impact is surprisingly small. By dividing the 2 millisecond time frame into two equal parts, one containing Ethernet content and the second multimedia content, the one-time frame was created as shown in Figure 3. The third part (or slice) of the box is assigned to management (H2Mgmt, ARB broadcast). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs For example, suppose that the Ethernet (11 a) with a typical frame length (300 bytes) and a 10-site network has a utilization rate of about 60%. It can be shown that under the same conditions, HL2 is about 80% efficient for data transfer. This 80% efficiency is the result of the following: 12% of the HL2MAC frame is designated for management (frame letterhead-BCH, FCH, ACH and RCH). In addition, the data loss is about 10% (CRC, SAR, LCH header). Therefore: (1-0 · 12) X (1-0.1) = 0 · 792? 0 · 8 (80% efficiency). By dividing the 2 millisecond time frame into two equal parts, one contains Ethernet content and the paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) "31 · 548935 Α7 B7 V. Description of the invention (29) (Please read the notes on the back before filling in this page) A second multimedia content, a frame was created as shown in Figure 3. The resulting channel efficiency is: (0.44 X 90%) + (0.44 X 60 %) = 66%, which is slightly better than (not bad) the above 60% channel efficiency using only the Ethernet channel utilization, and slightly worse than 80% channel efficiency using only the HL2 channel utilization. However, this slightly Low efficiency can be remedied. For example, if Ethernet content is passed without multimedia, HL2 management information does not need to be transmitted once in each unified frame. Conversely, HL2 management information can be every 500 milliseconds or more It is transmitted because this information will only be necessary when joining. In this way, the cost of interoperability can be reduced by less than 1% of the channel time. (Without the existence of HL2 connection, the management information department is only 2.2%.) Employees of Intellectual Property Bureau, Ministry of Economic Affairs The consumer cooperative prints FIG. 4 to illustrate an embodiment of a wireless communication network 400 that implements, for example, the "partial" solution discussed above. In this example, the first part of the MT operating in a multimedia (HL2) environment and It is marked as "M-MT", a second part of MT is operated in the Ethernet (11a) environment and marked as "E-MT". A multimedia AP communicates with M-MT. An Ethernet AP communicates with E-MT. M-MT communicates with each other. E-MT can communicate with each other. M-MT cannot communicate with E-MT directly and vice versa. An access point (AP) is provided for each A multimedia (HL2) and Ethernet (11a) environment. An arbitration function (ARB) is provided in the multimedia AAP to manage the interaction. In this embodiment, the wireless network includes two separations APs, each for each environment (multimedia and Ethernet). Two separate APs, an Ethernet AP (E-AP) and a multimedia AP (M · AP) via a communication link, such as Communicate with each other via land line or on air channel, this link acts as a bridge between two APs. The ARB is implemented in the M-AP as shown Because it does not include full AP This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) · 32-548935 A7 B7 V. Description of the invention (3〇) (Please read the precautions on the back before filling this page ) Events, and only exercise control of time slices, so it is "partial." Within the scope of the present invention, ARB can be implemented in E-AP. ARB can include events of two environments is also within the scope of the present invention Figure 5 illustrates one embodiment of a wireless communication network 500 that implements a "full" solution in a multiple (multimedia plus Ethernet) environment as discussed above. This multi-environment system is called a "coordinated network." In this example, there is a unified AP (U-AP) that can communicate with U-MT and E-MT. Because U-MT can communicate with E_MT, all of them are fully interoperable. In this solution, it is preferable that there is no M-MT. U-MT can communicate with each other. E-MT can communicate with each other, but not with U-MT. The ARB system is shown to be implemented in U-MT. Arbiter (ARB) The Arbiter (ARB) implementation is responsible for dividing the time domain between agreements. It can be combined with E-AP or M-AP. It can be selected dynamically (such as in dynamic HL2CC selection). Agreement segmentation can be policy-oriented and dynamic to ensure maximum efficiency. 11a and HL2 devices must transmit only within their designated time slice. Printed by the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the ARB system needs to appear on the coordinated network all the time. Its work is divided into time domains between 11a and HL2 agreements. Segmentation is implemented by imposing policies as the main deduction method, and / or measuring protocol utilization for 11a and HL2 networks. The arbitration entity generates an ARB broadcast message indicating 11a and possibly the HL2 central controller (CC) for the available time slice of the individual agreement. The complexity of ARB depends on the schedule deduction method and arbitration management design used. The management design department is discussed below. As for the sorting and deductive method, its complexity This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -33-548935 A7 ___B7 _ 5. The description of the invention (31) can be changed according to application requirements. The static arbiter works fairly smoothly. A dynamic arbiter will be slightly more complicated. It is not desirable to extend the deduction method (please read the notes on the back before filling out this page), because this will produce a highly complex deduction method, which will be slightly better-〇 information for a typical ARB It is the number of stations (MT) in the network, the traffic utilization rate and the number of resource requests rejected by HL2CC. Using these parameters and a set of architectable rules (via SNMP or other management protocols), the arbiter (ARB) can update resource allocation requirements. The management function of the arbitration entity bears certain completion tasks similar to those in the BRAN considering the behavior of the Central Controller (CC) in the HL2 ad-hoc web script, that is, the procedure used for the CC selection, and between CC and other related matters Procedures for changing hands. The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is printed in a unified network state, that is, all network activities are based on only one of the two agreements (11a or HL2). The inclusion of ARB information in every 2 millisecond period can be considered as unnecessary. In these cases, preferably, the ARB information is transmitted over a longer period of time (for example, every 500 milliseconds), and the arbiter will allocate a minimum time slice to another protocol to allow devices using the protocol. Join it. For 1 la, the time period will contain probe information, a delay to allow authentication and join requests generated by the STA (MT). For the HL2 agreement, the time period will include the generation of BCH, minimum FCH (traffic unassigned), minimum ACH and RCH to allow mobile terminals to join. The arbitrator will increase the time slice allocated to the agreement during the accession request and at the beginning of the transport. This design will optimize the traffic utilization of the unified network and at the cost of longer join processing. Generally speaking, the arbitration entity (ARB) does not need to support 11a and HL2 standards. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -34-548935 A7 B7 V. Description of the invention (32) (please first Read the notes on the back and fill out this page). Therefore, it is possible to implement a simple agreement by which one of the agreements HL2CC and llaSTA (E-MT) is reported to the arbiter (ARB). For example, in a typical implementation (such as phase 1.2 or 2.0), llaAP (E-AP) will be used as the HL2CC and ARB that combine all functions in one device. Obviously, when the ARB has good conditions of traffic utilization and the requirements of different agreements, it is not necessary to have a specific reporting agreement. Another plus from this architecture is to achieve interoperability between 11a and HL2 devices by using APs as a transfer. Interoperability between home, business and public environments Interoperability between various operating environments is achieved by using the same uniform agreement across all environments. This ensures the coexistence of devices used for different operating scripts so that they can work and share the same frequency band. In order to complete higher level communication between devices using 11a and HL2 protocols, it is also possible to use an optional network entity that can recognize both protocols. In this typical example, there will be a lla / HL2 access point / central controller (AP / CC). This entity will provide protocol conversion capabilities to ensure data transfer between HL2 and 11a devices. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Typically, commercial data communication center devices will use the 11a agreement, and home multimedia center devices will use the HL2 agreement. Although the above segmentation covers the major part of these device activities, it is important that it allows some level of QoS support for data communication devices and allows multimedia devices to use asynchronous communication for control and other purposes. One solution is to make each device support the rain agreement. The current QoS extension to the 11aMAC protocol is defined. Preferably, the definition of "light QoS" is introduced to complete the support of 802.1 p / q, RSVP and other wired data communications equivalent QoS extensions. Modify llaMAC to support "light QoS". Apply this paper size to Chinese National Standard (CNS) A4 specification (210X297 mm) -35-548935 A7 B7 V. Description of invention (33) (Please read the precautions on the back before (Fill in this page) introduce unnecessary complexity into the agreement. Because "light QoS" transport supports its wired equivalent, it provides most of the commercial requirements for QoS. This will keep commercial installations simple and keep 11a as the basis. The current multi-form nature of HL2 (current commercial and home extensions are introduced) limits interoperability. Because different protocol choices are applied to different forms, devices built from different forms will have great difficulties and may not even communicate. Because the 11a standard provides a strong and simple solution for commercial devices, it is better to dispense with commercial and public forms and build a single HL2 form for unified agreement based on "HL2 Home Extension". The home extension transmission to the HL2 agreement QoS, IEEE1 394 and ad-hoc network connections support all the major necessities of the unified protocol used in the present invention. Because signaling and non-QoS traffic concepts have been integrated into the HL2 protocol, it is not used for multimedia devices in HL2 Subject. The segmented large MAC box is printed by some consumer cooperatives in the Intellectual Property Bureau of the Ministry of Economic Affairs. For example, when using the slow transmission method, the maximum 11 MAC box size can be larger than the 2 or 2 millisecond time slice allocated. Therefore, according to this It is clear that the arbitration of frame 11a is completed by applying segments. The maximum frame segment size will be determined by the size of the 11a transmission time slice and the data rate. The minimum slice size 値 can be specified and distributed in Beside BSS (e.g. ARB broadcast), and protected any time slice allocated 1 la time will not be shorter than this. When segmentation is needed, fragments The size should be calculated using the minimum slice size. In a typical state (for example, 16QAM), a 600 millisecond slice for a 1 la protocol is sufficient for unfragmented transmission of the maximum length Ethernet packet. Typically, the The paper size of this paper applies the Chinese National Standard (CNS) A4 specification (210X297mm) _ 36 548935 A7 B7 V. The description of the invention (34) will be avoided. (Please read the notes on the back before filling this page) Multicast and The segmentation of the broadcast box is generally not supported in the 11a standard. Therefore, according to the present invention, the llaMAC is enhanced to support the segmentation of broadcast and multicast information. When transmitting broadcast or multicast segments, no approval is sent, And does not support segmented retransmissions. This is based on the unsegmented multicast and broadcast traffic specifications in 802.1 1, which does not support approval. Small-size segments for 1 laE-MT are not implemented by the unified agreement The 11aMT (E-MT) caused problems, and the transmission of the agreement did not exceed the time slice of the unified agreement 11a. Therefore, the E_MT in these coordinated networks that did not implement the unified agreement should not transmit more than 802.1 1 time slice To ensure this, a small fragment size is forced on the 11a box of these E-MTs. At the same time, the HL2 time slice will be advanced by a guard time, which will make an E-MT enough to send out a segment. For example,- The segment size is approximately 100 milliseconds; and-the protection time is approximately 100 milliseconds. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. In this way, HL2 transmission will be protected from interference by 11a transmission, which starts at HL2 time slice. Before, for this, there will be one contention-free period, one to one segment transmission time, before the HL2 time slice. The size of this box should be small enough so as not to reduce channel efficiency. This feature is only about allowing "old" llaMT environments to ensure backward compatibility. In environments without old llaMT, it can be disabled or simply ignored. Prevent E-MT from being transmitted outside the 11a time slice. Under the current llaMAC rule, if a specific 11a station (STA) starts to transmit the paper size to the Chinese National Standard (CNS) A4 specification (210X297 mm) -37-548935 A7 B7 V. Description of the invention (35) (Please read the back first Note: Please fill in this page again) After inputting (in the carrier sense or CTS DCF mode, or after the call is made by the PC in PCF mode), it will not take into account any external timing restrictions, and the full box (or minute Segment) will be sent out. In order to implement the general agreement of the present invention, it is necessary to ensure that no E-MT (STA) is transmitted outside the 11a time slice. The current lla-MAC function uses the idea of NAV (Network Allocation Vector) Supports the virtual carrier sensing mechanism, which is expressed based on the time in each frame (RTS / CTS, CP, etc.), and predicts future traffic on the media. According to the present invention, the time slice not allocated to the 11a agreement will be lla-NAV Submitted as Busy. Each ARB broadcast will update the duration of the next HL2 slice of the NAV and the ARB broadcast information, indicating that it is "busy." Because when there is a NAV traffic instruction, all STAs in the BSS or IBSS are not transmitting, so the 11a device will Restricted to use only 11a to allocate slices. The "look-ahead NAV" designation implies that each transmitting STA (MT) must check that the frame size fits in the allowed slot and does not collide with a look-ahead NAV. If the frame size Without coordinating into the slot, the STA will suspend the transmission of the frame until the next available slot. Reasonable clock synchronization between the STAs in the BSS can be maintained to make this mechanism act and can be obtained from the lla-MAC The indicators and clock synchronization mechanism are completed. The Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs printed the amendments to the HL2 and 11a agreements. The amendments to the HL2 agreement were made to allow the coexistence of the agreement to include changes to the joining process. Because every 2 millisecond period A BCCH message will be generated, so each device on each band should be able to wait longer. The HL2 central controller (CC) must be synchronized with the arbiter (ARB) to make time The film allocation will not collide, the CC sorting deduction method must be able to know that “occupied” TDMA time slots will not apply them. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -38-548935 A7 B7 V. Invention Note (36) assigned to any HL2 device. (Please read the notes on the back before filling out this page) Amendments to the ILA agreement to allow the agreement to coexist, including-strengthening the existing segmentation mechanism as described above; and- Change the NAV function so that HIPERLAN / 2 can be registered in the 8 02 · 11 device as "busy" (see above). NAV updates should be performed for new ARB information. In addition, it is necessary to add "light QoS" support to 802.1 1 devices, such as those specified in IEEE802.1 P / Q, RSVP, or others, to provide a basic degree of Q 0s for business applications. This matter has been described in the above, restrictive operation of the "home" environment. In HIPERLAN / 2, 802.1 1AP / PC should be able to synchronize with the arbiter so that time allocation will not collide in PCF mode. Conclusion Intellectual Property of the Ministry of Economic Affairs The invention printed by the Bureau's Consumer Cooperative is beneficial to its combination and completes the coexistence between the IEEE802.il (11 a) and HIPERLAN / 2 (HL2) protocols. It has a universal interoperable 5GHz standard (general agreement) and will Massively simplify the global adoption of wireless LAN technology. By using the strongest features of 11a and HL2, dedicated devices used in various operating environments can share the same network and exchange data without having a significant impact on device complexity The present invention provides a usable architecture for common protocols. 'One of the most important features accomplished by the present invention is that each device in a common wireless network is kept as simple as possible. Wireless commercial devices are based on field certification and The current 11a standard ensures rapid development and low cost. Wireless multimedia is completed through Jie Jie and strong HL2 standards. The paper rule is not mentioned in this case Applicable to China National Standard (CNS) A4 specifications (210X297 mm) -39-548935 A7 __B7_ V. Description of the invention (37) Repair and minimum adoption and modification to complete wireless multimedia, and data communication and multimedia Coexistence. (Please read the notes on the back before filling out this page.) This case completes another level of simplification by applying a single form of answer to all devices. This ensures that users will not need to manage separate wireless The answers should be consistent with various incompatibilities. Because the same wireless network protocol has been completed globally, users do not have to maintain several hardware devices or several architectures. The HL2 standard system is full of choices, making the protocol adaptable It is rugged and rugged, but it increases the complexity of implementation. When different vendors implement different options, they must be carefully practiced. At this time, a least common denominator method is preferably used, which supports QoS, error control or privacy. Is not desirable. In these examples, the least common feature may lack QoS, lack of error control, etc. It is important to make available protocols Choose the smallest, set the required selection as necessary, and avoid the "selection" indicator as much as possible. This can be applied to QoS support (for FSA-fixed, one-batch allocation method, exempt from FCA fixed capacity coordination method), error control (Setting RS and ARQ, avoiding competition), privacy (restricting the number of choices that can be managed and verified) 〇 Printed by the Consumer Consumption Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs It is understood that various changes, modifications, and other applications of the present invention can be completed, and these are within the scope of the present invention thus disclosed. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 public envy)

Claims (1)

548935 Printed by A8, B8, C8, D8, Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economics, Patent Application Scope 1. A method to enable wireless network devices (MT) operating in two incompatible communication standards to coexist without interference, including Steps: Divide a periodic time domain into a first slice for use by devices operating in accordance with the first communication standard (E-MT), and a second slice for devices operating in accordance with the second communication standard (M -MT); and broadcast time slices to the MT. 2. The method according to item 1 of the scope of patent application, wherein: the period time domain has a duration of 2 milliseconds. 3. The method according to item 1 of the scope of patent application, wherein: the first communication standard is basically composed of the IEEE802.1 1a standard; and the second communication standard is basically composed of the HiPerLAN / 2 standard. 4. The method according to item 1 of the scope of patent application, further comprising: providing a first access point (E-AP) for processing communication with the E-MTs in the first environment; and providing a first A second access point (M-AP) is used to handle communication with M-MTs in the second environment. 5. The method according to item 4 of the scope of patent application, wherein: the first environment is an Ethernet environment; and the second environment is a multimedia environment. 6. The method according to item 4 of the scope of patent application, further comprising: providing a communication link between the E-AP and the M-AP. 7. The method described in item 1 of the scope of patent application, further comprising: providing a unified access point (U-AP) for communicating with E-MT and M-MT in a multiple environment. This paper size applies to China National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling this page) 548935 A8 Β8 C8 D8 6. Scope of patent application 8. The method described in item 1 of patent application scope also includes: (Please read the precautions on the back before filling this page) Introduce a protection period between the two slices to prevent Overlapping operations between E-MT and M-MT. 9. The method according to item 1 of the scope of patent application, wherein: the first and second time slices are substantially equally divided. 10. The method according to item 1 of the scope of patent application, further comprising: broadcasting time slices to MTs every time period. 11. The method as described in item 1 of the scope of patent application, further comprising: periodically broadcasting time slices to MTs at a time interval, the time interval being greater than the period of the periodic time domain. 12. The method according to item 1 of the scope of patent application, further comprising: based on the activities of the wireless network devices (MT), allocating time slices unevenly according to priority. 13. The method described in item 1 of the scope of patent application, further comprising: segmenting data frames sent by an E-MT that are larger than the first slice. 14. The method as described in item 1 of the scope of patent application, further comprising: forcing a small segment size on the information frames of the E-MTs; and printing at the second time by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Before, a protection time (no contention period) is provided; of which: the protection time is sufficient for E-MT to send out a segment. 15. The method as described in item 1 of the patent application scope, further comprising: preventing an E-MT from emitting outside the first slice. 16. The method according to item 15 of the scope of patent application, wherein: the E-MT is busy in the network allocation vector (NAV) of the first communication standard by setting all other time slices in the time domain, And prevent the emission at -42- This paper size applies to Chinese National Standard (CNS) A4 specifications (210X297 mm) 548935 A8 B8 C8 D8 々, outside the scope of the patent application for the second slice. 17. The method according to item 16 of the scope of patent application, further comprising: before transmitting a frame, the E-MT checks that the frame size conforms to the allowable slot in the first slice, and does not match the Look forward to NAV collision; and if the frame size does not match the first slice, E-MT suspends the transmission of the frame until the next available slot. (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -43- This paper size applies to China National Standard (CNS) A4 (210X297 mm)