TW200843378A - Quiet period management in wireless networks - Google Patents

Abstract

Spectrum agile devices use non or under utilized portions of the radio spectrum to communicate. However, when a primary user of the channel starts operation, the spectrum agile device must typically vacate the channel. Thus, spectrum agile devices use quiet periods to sense whether a primary device is present. Quiet Periods can be scheduled or on-demand, and quiet periods can be initiated so that the quiet periods of different channels do not overlap.

Description

200843378 IX. Description of the Invention: [Technical Field of the Invention] The present disclosure is directed to wireless communication, _m a > More specifically, a method and system for managing a communication-free period of a frequency n or line system. [Prior Art] The continued use of the radio spectrum has led to an increase in the management of the staff. One approach involves the use of unused or under-permitted licenses, and the technology is also known as spectrum opportunities or opportunities. By means of the frequency agile radio (SARA) device - 镅 德 a 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 SAR money allows for short-selling spectrum, and not = incumbent's such as TV or cellular signals, causing harmful interference. Now = also known as the main user. SARAU is also known as a secondary user, 2 the frequency band that can be used for unlicensed bands, such as radiotelephones and/or sidebands. In one thing: Α Ancient. In the eight-body...lj, the non-cognitive device can be regarded as the user of the k-threshold, and the SARA-fan-T-communication is used when using the spectrum. In the frequency band in which the priority user has not been granted a license or has not been granted a license, the fourth (fourth) w 〇 ... 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 ^ The time that cannot be made appears on the channel, and the channel is played second. The main user's memory #pass "This reliable system exists through ^ No communication week (10) Ρ). Qp_, suspend all network traffic = strong and secondary users to sense the channel for the primary user. Any other channel that is sensed by the second-way) avoiding the rabbit book, the channel that is more heart-rending (for example, adjacent frequency, and π-sensing' is called out-of-band sensing. 128265.doc 200843378 No communication cycle to feel Measured for spectrum opportunities and the main [invention content] ^ The claimed invention claims to meet this need can be understood through the teachings of this article. "The method of 'the line cycle' contains no spectrum agility.

The spectrum agility is packaged in electricity, and the packet contains users who are not associated with the timing of the communication cycle. The ρ·8 dry 3 no-pass cycle is used to sense the main :/, body yoke example. The method further includes a non-communication cycle according to the received σ: private. In a particular embodiment, scheduling, less-no communication cycles to avoid overlapping communication weeks between other channels. In a particular embodiment, at least one of the non-communication cycles of the schedule is periodic and exceeds two or more hyperframes. In a specific embodiment, the information further includes at least one of channel information, primary user detection information, jump information, report information, and alternate channel information. In a specific embodiment, the method further includes receiving-requesting no-pass: packet, and the non-communication packet includes a poor communication associated with a no-communication cycle to receive the request without a communication packet. Or soon after. In a specific embodiment, the response sensing may represent a signal to the primary user and the node may send the request without a communication packet. In the specific embodiment, the selection time is used for the start time and duration S of the no communication cycle, which avoids the overlap of 128265.doc 200843378. In a non-communication cycle embodiment that broadcasts to a point in one or more channels of the radio spectrum, the request is not packetized to multiple other nodes. In the specific implementation of the shot, the method includes the start--no communication Tuesday sensing a primary user' and the sensing for the primary user is sent to the network. In a particular embodiment, the packet is a periodic broadcast control packet. A spectrum agile device implemented in accordance with the present invention includes a frequency-frequency (four)-variable communication module that is operable to transmit and receive on a spectrum used by a primary user (4); The processor is operable to initiate a no-communication cycle on at least one channel of a spectrum agile radio network based on a pass-free packet received from a packet transmitted on the spectrum agile network And a sensing module operable on at least one of the channels of the spectrum agile network - mainly using the $_ &&&& The spectrum agile radio system includes a primary use, a scavenger eight, a and a spectrum agile user, the spectrum agile user includes a spectrum agile communication module, the communication module is operable to a semaphore that transmits and receives the unused spectrum on the spectrum, and the processor is operable to receive periodic information from the packet transmitted on the spectrum agile network. Start at least one channel of a spectrum agile radio network James. #, A non-communication period, and a sensing module, the sensing module detects a system operable W U on the primary user of the spectrum of the at least one channel Czech variant of the network. In a specific embodiment, the primary user is a licensed user of the channel 128265.doc 200843378. Other objects and features of the present invention will become apparent from the following detailed description. However, it should be understood that the drawings are merely for the purpose of description and are not intended to limit the invention. [Embodiment] Several specific embodiments of a method and system for managing a communication-free period (QP) will now be shown and described in conjunction with the accompanying drawings.

Unless specifically or implicitly in the context, the term packet as used herein is intended to have a broad and non-limiting definition, and without limitation, reference to a bundle of data that can be transmitted from one device to another in any manner. The term "node" as used herein has broad and non-limiting definitions, and is not limited to devices, computers, objects, and the like that can be coupled to a communication network in any manner, unless expressly or otherwise specified by the context. / Figure 1 illustrates an exemplary communication system 100 in accordance with the present invention. Figure 1 & includes a plurality of nodes, e.g., a primary user 1G6 coupled to a communication antenna (10), and a plurality of secondary users (node i 1〇2 through node N 104). In one embodiment, the primary user is a television station that has been granted a license for the channel on the radio spectrum and broadcasts the content to the TV viewer (not shown) using the licensed channel. Some stations do not broadcast continuously and/or some TV channels are completely empty, so line channels within the radio spectrum are available. Secondary users iQ2, (10) use these vacant channels (also known as spectrum opportunities) to communicate with each other and/or with a communication base station (not shown) when the primary user (10) is not using the channel. Since the user 1〇2,1〇4 usually has to exist in the channel 128265.doc 200843378% of the primary user 1〇6, the secondary user 102, 1〇4 use no communication ^ sensing ^ use 1G6. This is also known as in-band sensing. The following details (in detail) show two T-induction methods, namely scheduling and unscheduled. In Figure!, the primary user's channel is licensed (4), however, in the case of -1, the primary leader may be a higher and priority user within the channel that is not licensed. In the case of a singular yoke, a regulatory agency (such as the United States c) may determine the priority of the channel user. The primary user may be any signal or radiation that the secondary user vacates the channel. The radio spectrum includes a plurality of channels that are granted and unlicensed. The secondary users 1G2, 1G4 may use one or more of the channels for communication. The secondary users 1 〇 2, 1 〇 4 illustrated in Figure i can communicate with different users and/or base stations on the separate channels. Moreover, in the embodiment, even if the secondary users 1G2, m are operating in different channels, the secondary users 102, 104 can communicate with each other, such as channel conditions. Since the secondary users 102, 104 may be forced to enter another channel from the - channel due to the presence of the primary user 1-6. In a specific embodiment, the secondary users 102, 1〇4 can sense the primary user in the channel currently being operated by the secondary users 1() 2, 1〇4, and the channels in their inactive channels. Also known as f external sensing. The channels for the secondary users 1G2, 1()4 are also referred to as the home channel, and all other channels are called foreign channels. In other words, in-band sensing occurs on the home channel of the secondary users 1G2, 1G4, and out-of-band sensing occurs on the foreign channel. In one embodiment, the secondary users 102, 104 can coordinate the use of multiple frequencies 128265.doc • 10 - 200843378. For example, in a specific implementation, A ^ .. m . Ύ 田 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Using this dissemination information, 'V..j's no communication cycle, so that one of the advantages of non-heavy QP is that the secondary device can be in the other phase of the channel. Out-of-band sensing without sacrificing the no-communication cycle on its own channel. In one embodiment, through multi-channel media access control

MAC) Association; t implements coordination between secondary users 1 () 2, (10). A properly designed MC-MAC protocol enables the same adjacent channels, 丨K, to communicate simultaneously in different channels without interfering with each other. However, the methods and systems described in the text are not limited to the MC-MAC protocol, and various protocols can be implemented in different communication layers using other protocols. Eight Figure 2 illustrates the three super-frames (i, (4), of the single-channel ^). The time within the channel can be divided into a number of recurring frames. The hyperframe contains schedules and optional QPs. In a specific embodiment, the QP is scheduled in advance by using _2, 104 schedules. For secondary users on the same home channel, (10) knowing the existence of the scheduled QPs before they occur, and the scheduled Qp has a known start time and duration. During this time, the secondary user Μ], 1 〇 4 suspends its transmission and performs the (4) measurement. The material schedule Q p can be periodic and occurs on multiple hyperframes. In one embodiment, the scheduled QP is communicated within a control packet that is periodically transmitted. For example, in one embodiment, the schedule Qp is communicated within a beacon packet that is supported in many existing wireless networks, such as IEEE 802.1 1, WiMedia UWB MAC, IEEE 8〇215, and other wireless 128265. Doc 11 200843378 Agreement. In these network orders, the beacon packet broadcasts concurrently a good candidate for the information of the periodicity QP. In the case of the QP system, the QP system is selected by the secondary users 1〇2, 104 during the hyperframe. For example, it is sensed on the channel: possibly primary user 106. In an emergency, the user is unable to wait for the scheduled QP and must immediately enter the QP. The QP can be initiated by the single-secondary user and does not have to have the same period as the scheduled QP. In a particular embodiment (not shown), the on-demand QPs may overlap and replace the schedule Qp. m is like scheduling Qp, the secondary users 1G2, 1G4 on the same home channel pause transmission and perform in-band sensing during the on-demand QP. Since the on-demand QP is randomly initiated, is the beacon packet for the initial on-demand? It may not be ideal. Thus, in one embodiment, network 100 may define a dedicated control packet that can be broadcast to a node at multiple hops and that initiates a no communication cycle for one or more channels. In this manner, a no-communication cycle area is formed around the node that initiates the on-demand QP. An exemplary control packet that can initiate an on-demand Qp is a request for no communication (RTQ) control packet. Figure 3 illustrates an rTq 3〇〇 package implemented in accordance with an embodiment of the present invention. Various embodiments of the present invention may use RTq with more or less information as required by standards and/or specific networks. In one embodiment, the RTQ can be a signal to the trigger device to immediately enter the QP upon receipt of the signal. The RTQ illustrated in FIG. 3 includes a channel element 302, a duration element 304, a primary detection information element 3〇6, an information element 308 associated with the number of hops that the light bulb should propagate, and an instruction element 128265 associated with the reward information. .doc -12- 200843378 3i〇, if the primary user is detected, the device can switch the alternate channel component 3 14 , a threshold.

Upon receiving the result of the RTQ, the node initiates Qp and senses the primary user. Channel information element 302 informs the node on which channel to start Qp. In a specific embodiment, the RTQ can omit the channel m node to start the QP on its home channel. The performance time information component 304 informs the node when to start Qp and how long it should last. This information can be sent in a number of different forms. Example 2 In a specific embodiment, the RTQ 300 can include a qp start time and a Qp end f time. In a particular embodiment, the RTQ may include a Qp start time and a performance time, such as 1 〇 milliseconds. In one embodiment, to assist the node in sensing the primary user, the RTQ 300 can also include the primary (four) information element 3G6. (4) The component specification may contain (several) thresholds that determine whether the channel is used, the probability of detection and false alarms and/or any other information that helps the primary mosquito user to enter the channel. In a particular embodiment, the node senses any energy during the no communication period because the SARA device does not transmit 'if node sensing-predetermined level energy during the no communication period, which can assume that the primary user is present and will be empty Out channel. In a particular embodiment, the node may be implemented during a no-communication cycle - or multiple fine tests, such as looking for a particular signature of the signal rather than a simple energy regime. Tests can be different tests or the same test and can have different thresholds and/or other parameters. In one embodiment, primary detection information element 306 contains information associated with the type and number of tests performed. Rtq can be propagated over any number of hops as described above. Figure 4 illustrates a communication network 400 of 128265.doc -13- 200843378, which includes nodes VIII to 〇, wherein the RTQ system transmitted by node 8 propagates over 2 hops, each arrow corresponding to a hop. In a specific embodiment, the RTQ may include a count that decreases with each transmission after the first transmission. Receiving a node with a zero counter <RTQ will not resend the RTQ. Counters and/or other hop information can be sent via the RTq 3〇〇 hop information field component. A specific embodiment ....., -, ^ slave is the point)

Report information obtained during periods of no communication. The report information can inform other nodes to switch channels according to the main users, and inform other nodes that the main users are not detected. The report information can include the original test results, channel frequency, and effective duration of the sensing (if the main use is detected immediately) The user may not need the full QP), the detected user type 1 signal level, and other information about the person and/or channel. The node receiving the report information can use it to make measurements and decisions about the channel. In a particular embodiment, the reporting information element 31A may include a flag indicating whether information associated with the p-test should be sent to other nodes. In a particular embodiment, the reporting poor element 3 丨 0 may include an identifier for the node of the RTQ so that the receiving node knows which information to send back to. In the _: example two report: the signal element 31. The node may report the result. “In a specific embodiment, the node does not have to report after each no communication cycle: the report data is sent according to any other algorithm. The content of the report may: include the last sensing during the last no communication cycle. The result: 匕 contains any results from any previous no communication cycle, and can enter 128265.doc -14- 200843378 If the primary user is detected, the secondary user must usually vacate the channel. In an embodiment, RTq 3 〇〇 may include an alternate channel information element 3 14 . The alternate channel information element 3 丨 4 may be used by the node when switching channels to avoid primary users. In a specific embodiment, the alternate channel information element 3 1 4 includes more than one channel so that many nodes do not attempt to switch to the same channel after detecting the primary user. Further, in one embodiment, the point can change the alternate channel information element before resending to the next hop. 3 14. '

Some or all of the information in the RTQ may also be located in the control authority scheduling QP, for example, the beacon packet is in a specific embodiment, the high priority is used to process the RTQ and is transmitted short enough to pass to the next hop. , to the required QP timing declared in the corresponding rtq. In a specific embodiment, the header field of the packet sent by the node includes a dedicated flag, which informs the potential primary user of the festival. In the specific embodiment, the shelf may be referred to as an emergency coexistence situation S. ) Blocking. When a political block is set, the node can perform a faster spread of the pre-RTQ. For example, a node can slow down a transmission that is in progress or send a normal packet for a sense of time (4). Figure 5 illustrates a multi-channel embodiment (CJC2), #中跨 across: no overlap in time. Although _ indicates 2 channels: can be;; Road QP management is scaled to any number of tons, f-mountain will be explained by the evening frequency, 7 channels within c. As shown in Figure 5, by the dotted arrow: - month ^ the schedule material will not be appropriate. Since the material overlaps, the use of Cl as the section of the local channel = heavy QP period to implement 2 negative sensation in channel c, without having to miss the in-band sensing during the QP of its home channel 128265.doc •15- 200843378 C1 The opportunity is the node of its home channel. Therefore, if the ^^ brother is suitable for the like, the nodes in the adjacent channels are connected to the π Qp. ϋ, can significantly improve the function of out-of-band sensing. QP is usually in emergencies. ~ It is urgent for the situation to be avoided. It can overlap with other lang points, such as channel channel and heavy csQP. Therefore, two follow-on QPs. In the case of the two, the two rhymes in the super-frame (4) of the second and the second post, the optional Qp can overlap with the other or the same channel QP. In a single application, the node can delay the on-demand percentage to avoid overlap between the on-demand QP and any scheduled QP. The purpose of the example is not limited to the management system described herein and the IEEE IEEE 〇2·22 'WiMedia UWB> IEEE 802.1 1 > IEEE 802.15 and other wireless systems. 6 illustrates a method 600 for scheduling a QP implemented in accordance with an embodiment of the present invention, starting with step 6〇2. In the step, the node listens to and/or requests QP management information. In a particular embodiment, a node desiring to communicate on the channel may broadcast a request for one of the Qp management information. In a specific embodiment, a node desiring to communicate on a channel can listen to QP management information that is periodically broadcast on the channel. In one embodiment, the node may send a request for QP management information if the node does not hear the broadcast information after a predetermined amount of time. If the qp management information is not received in step 606, the method 6 continues to step 608 where the node schedules at least one qP according to a predetermined set of parameters. Returning to step 606, if the Qp management information is received, the method 6 continues to step 128265.doc -16- 200843378 (4) 'where the node schedules at least one Q'QP management information according to the received cooking information, which may be from the use of the home channel Nodes and/or nodes from the use of foreign frequencies. In a particular embodiment, the QP of the scheduling node is such that it does not re-exist the non-communication cycle of the foreign channel. The method then ends at step 612. Figure 7 is a method 700 for initiating an optional QP implemented in accordance with the present invention. The method begins with a step. In step 7〇4, the younger brother feels a tight I + 杳, F, 丨, 冢, U, for example, there is a strong possibility that the main user has entered the channel. Next, in step 7〇6, the first node sends a control packet containing less information to start Qp. In a particular embodiment, the first node transmits the ruler as described with respect to FIG.

In v7G8, the other nodes in the vicinity of the first node receive the control packet. In one embodiment, method 700 continues to step 71, however, in other embodiments, step 710 can be omitted. In step 7 ! ,, the node that has received the control packet can check the hop information field 3〇8 to determine if the receiving node should resend the control packet. If the block indicates that the node should send the work packet, the node updates the hop information field 3〇8 and sends its own control packet to the adjacent node. After gamma step 710, method 7 continues to step 712 where the node receiving the control packet initiates a QP based on the received QP information. In one embodiment, the node receives a start time and an end time for the on-demand QP. Once the start time arrives, the node becomes silent and senses the primary user. In a specific embodiment, method 700 ends at step 716. In a specific embodiment, method 700 continues from step 712 to optional steps 128265.doc -17- 200843378 714. The QP region ^ I point can benefit from the sensing results of other nodes in the phase (four) domain. Thus, in a particular embodiment, each node may send its 卩1> sensed result to an adjacent node. In one embodiment, the information is returned to the node that initiated the on-demand QP. Next, method 7〇〇 ends at the step. The order and/or omission of steps within any method described herein is not limited to the specific embodiments unless otherwise stated. In addition, additional steps may be added, without being limited to any of the methods described herein. f Figure 8 illustrates an apparatus 800 implemented in accordance with an embodiment of the present invention. The device 800 includes a processing module 804, a communication module 808, a sensing module 806, and a memory 8〇2 coupled by a bus 810. The module of the device 8 can be implemented as any hardware, software, hardware emulation software and reprogrammable hardware, and a sink ", L row 81 〇 does not need to be a single bus, but The interoperability of the different modules of device 800 is illustrated. In a specific embodiment, there may be multiple bus bars. In a specific embodiment, some of the modules are directly coupled rather than coupled via bus bar 810. The device 8 can be implemented as a desktop 1, a notebook, a personal digital assistant (PDA), a handheld device, a wireless base station, a wireless telephone, or any other computing device or can be characterized as described herein. / or implement a function known or developed here. In one embodiment, the processing module 8〇4 can be implemented as one or more + central processing single TO (CPU), field programmable gate array (FPGA), or any other computer capable of executing a computer application. Component. The communication module includes one or more 1/〇 components that are used by device 800 to communicate with users and other devices. For example, a user can use components such as a monitor, keyboard, mouse, and disk drive to input information to and output information from the device 8A. 128265.doc -18- 200843378 Additionally, communication module 808 facilitates communication between device 800 and other devices or systems. The device 800 can use a cow, such as a day, line, data machine, network interface card (NIC), wireless adapter, universal serial bus (usb) adapter, etc., to interface with the network and/or other Device communication. Communication between device 8 and network 2 can also be done wirelessly or via a wired connection. In one embodiment, the sensing module 〇6 can be implemented as an antenna and nickname processing module that senses the energy or any (four) characteristic of the dominant signal on the channel. In the case of energy measurement, since the SARA device is silent during the no communication cycle, if the SARA device senses the energy of the threshold level during the no communication cycle, the primary user may exist on the channel, and the SARA襞The channel should be vacated. In a particular embodiment, the memory 802 provides electronic data storage using primary memory (e.g., Ram) and drive storage. Any type of electronic memory can be used, including but not limited to reading, dirty, drive storage: (more discs, discs, etc.), non-volatile memory (eg, flash § memory) or Any other memory in which the data is stored. The memory 802 can also operate to transmit (4) a packet to be transmitted via the communication module 8G8. Although the module of the device is described as a single block, the modules can include three, two or more different modules. In addition, the device _ is a part of another module, for example, the sensing module 嶋 can be part of Γ 8 ° δ and/or the processing module eye contains a certain - memory example of the beauty too jr 5 brother It is to be understood that the present invention is applied to its preferred embodiment of the invention, but it is understood that those skilled in the art can make various omissions, substitutions and changes in the form and details of the disclosed invention. The spirit. Therefore, it is intended that the invention be limited only by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The drawings are not to scale and are merely illustrative, and the like reference 1 illustrates a spectrum agile wireless network implemented in accordance with an embodiment of the present invention. 2 illustrates a scheduling of a channel and a selective no communication period (QP) for implementation in accordance with an embodiment of the present invention. Figure 3 illustrates a request for no communication packet implemented in accordance with an embodiment of the present invention. Figure 4 illustrates two hop propagation of an RTQ implemented in accordance with an embodiment of the present invention. Figure 5 illustrates scheduling and on-demand QP for a plurality of channels implemented in accordance with an embodiment of the present invention. The figure illustrates a method for scheduling a Qp implemented in accordance with an embodiment of the present invention. Figure 7 is a method for initiating an optional no communication cycle implemented in accordance with an embodiment of the present invention. Figure 8 illustrates an apparatus implemented in accordance with an embodiment of the present invention. [Key component symbol description] 100 Communication system 102 Node 1 / Secondary user 128265.doc -20- 200843378 104 Node N / Secondary user 106 Primary user 108 Communication antenna

300 RTQ 302 Channel Components 304 Duration Components 306 Primary Detecting Information Components 308 Components / Hop Information Field Components

310 Component/Report Information Element 314 Alternate Channel Information Element 400 Communication Network 800 Device 802 Memory 804 Processing Module 806 Sensing Module 808 Communication Module 810 Bus Bar -21 · 128265.doc

Claims (1)

200843378 X. Applying for a patent park: κ A method of communication cycle without communication, which includes: The frequency of the 睹 变 、 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , On the channel /', "at least one of the spectrum agile radio network, at least one helmet information starting from the beginning, ..., one of the cycles of the day is associated with:: the no communication cycle is used for sensing _Main user. 2. The method of claim 1, 1 隹 5 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The method 'where the schedule avoids a slap, a 1 port..., the conditional period is /, and the V-members overlap without a communication cycle. 4 · The method of the kiss 2, wherein the schedule is periodic And more than two or more superfilaments. There is no way to pass the four-phase master's method. The information further includes channel information, main user detection information, hop information, and at least one of the information. Channel 6':::!1 method, where the packet is requested The packet, /month, ..., overnight packet contains information associated with a no communication cycle to begin when the request is received without a communication packet or shortly afterwards. 7. The method of claim 6, wherein the response is sensed It may represent one of the & - the soil to use the straw number to send the request without a communication packet by a node. 8' :::: Item 6's method 'further, which is used for the opening of the no communication cycle The communication cycle overlaps. The second day of the channel is 128265.doc 200843378 9. The method of claim 6, wherein the requestless communication packet is broadcasted to at least one other node on multiple hops. 1〇·If the request item is The method further comprising: initiating a no-communication cycle; sensing-primary user; and transmitting a number of results of sensing a primary user to the network. η.: a method of unfinished, wherein The result includes at least one non-communication. The result of the sensing. The method of the term 1 of the term, wherein the packet is a periodic broadcast control packet. 13 - a spectrum agile device, comprising: a frequency Agile communication module, the communication system is operable to transmit and receive data on a spectrum that is not used by the primary user; (variable network:::, the processor is operable to send from the spectrum to the packet-based packet Received no communication cycle information, starting with a non-communication cycle on at least one channel of the radio network; and the sensing module is operable to detect at least one of the frequency and the circumferential path A primary user. 14. The apparatus of claim 13, wherein 摅兮4 is further operable to root: Ά矾 periodic information scheduling at least one no communication cycle. U-device 13 wherein the device schedules its At least the period to avoid overlapping no communication cycles between other channels. , please ^ device 'where the device can ❹ ~ / I brother, and respond to the test, where the packet is a request 128265.doc 200843378 no communication packet, the request is not communication 蜻 0 „ Included One of the communication cycles is held by the #盼, in order to receive the request from the beginning of the helmet. ..., when the packet is opened overnight or soon after, a spectrum agile radio system is included, which includes a major user; The user of the spectrum agile user includes: a spectrum agile communication module, the communication module is operable to transmit and receive data on a spectrum that is not used by the main user, a processor The processor is a packet received on the agile network =:, on the _ = at least one channel of the radio network - no communication cycle, the network::: module 'the sensing module is operable Measure the spectrum agility, at least one of the channels - the primary user. 18. The system of claim 17, wherein the processor is based on the non-communication cycle information schedule at least one no communication cycle.乍乂根1 9 ·If request item 1 7 夕会 μ, After that, the spectrum agile user schedules it to -.=== avoids overlapping communication periods between other channels. 1. ", where the spectrum agile user can detect the need..., k In the case of one of the cycles, and in response to the detection, the i-packet-requests no communication packet, the request has no communication packet; the second: = the duration, to begin shortly after receiving the request without the communication packet 2. u 4 128265.doc