TW201220899A - Method and apparatus for transmit power control in wireless networks based on monitoring multiple factors - Google Patents

Abstract

Described herein are a method and apparatus to determine transmit power including operating in a first mode until one of a first timer expires and a first mode switch message is received, operating in a second mode until one of a second timer expires and a second mode switch message is received, wherein in the first mode a transmit power is determined responsive to one of transmit power level instructions received from an associated access point and a maximum transmit power if no instructions have been received from the associated access point, and further wherein in the second mode the transmit power is a maximum of the transmit power level instructions received from the associated access point and a transmit power determined responsive to a frame transmission loss rate.

Description

201220899 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to wireless networks and, in particular, to adjusting link transmission power control levels based on the results of monitoring multiple factors. [Prior Art] In multicast and broadcast applications, data is transmitted from a feeder to a multi-receiver via a wired and/or wireless network. A multicast system as used herein is one in which a server transmits the same data simultaneously to one of a plurality of receivers, wherein the receivers form a subset of all of the receivers, up to and including all of the receivers. A broadcast system is one in which a server transmits the same data to one of all receiver systems simultaneously. That is, a multicast system can include a broadcast system as defined. A station can be any wireless device, including (but not limited to) a computer, a laptop computer, a notebook computer, a digital assistant (pDA), a dual-mode smart phone, a user device, and a client. A device, a mobile terminal, and a mobile device. A station can be a transmitter, a receiver or a transceiver. Information transmitted between devices can be text, audio, video or multimedia or any other type of material. The data is usually formatted into packets and/or frames. That is, the frame and the packet are formatted for the convenience of transmission. In the past few years, wireless network deployment has grown rapidly in campus 'shopping malls, hotels, airports, apartment buildings, and homes. Emerging technologies such as the 'IEEE 802.1 1 n radio' make it possible to deliver multimedia content over a wireless network. This increased deployment drove the technology deeper into people's embarrassment. 155295.doc 201220899 Often life. Since the number of available wireless channels is limited, such channels must be used or shared by multiple access points (APs) or base stations (10). In a dense deployment environment, for example, in a multi-dwelling unit deployment of one of the eve APs in an apartment building or hotel, Ap often interferes with each other. This affects the throughput of the overall wireless network, and therefore, affects the quality of service for multimedia streaming applications. A wireless (mobile) device only eight in its vicinity? Associated and communicated. By properly controlling the transmission function of an AP and its associated mobile device, the communication between the Ap and the mobile device can be successfully operated 'and the transmitted signal pair of the Ap or the mobile device is adjacent (adjacent, surrounding area) The communication between the other Ap and its associated mobile device does not cause interference or cause less interference. Can reduce the same-channel reuse distance. That is, other APs and their associated mobile devices within a smaller (less) proximity (distance) can be reused with the same channel for simultaneous transmission without interference. This principle allows many devices to 'communicate with their associated A' in a given area while using only a limited number of wireless channels (links). The lower the transmission power, the less (smaller) the spatial separation (distance) required to reuse the same channel without interference. Therefore, increase the overall network capacity in a dense department: For example, in the _ zone, for a cellular communication network, it has a lower transmission power - the smaller cell size results in a higher overall network capacity b control - wireless device (Ap or mobile device) = transmission power The goal is to use the minimum transmission power of the device while meeting the requirements of the transmission and packet loss rates. Transmission power control helps reduce interference with other channels and ultimately increases the overall capacity of the wireless network. In addition, the battery life. Transmission power control helps save energy and improves the action of the device. The device is close to a transmitter (wireless device 'station) and has a good frequency η value. The transmitter can use low power to transmit the data signal. However, the distance between the thief and a receiver is relatively large and the channel ^ is not good _ 6 hai transmission a needs to increase the power to transmit data to ensure that the receiving H receives correctly and maintains the link delivery amount. The challenge is how a transmitter determines and adapts (if the channel conditions change) its transmission power to optimally transmit the data k number to a receiver. In a prior art study, a transmission power control algorithm was proposed to reduce interference in the IEEE 802.U wireless network and increase its capacity. It adapts the transmission power based on the packet loss rate 'however, it requires some samples to be paid - accurate packet loss rate' resulting in a long measurement time and a slow response to channel condition changes. In addition, it is also difficult to accurately adapt the transmission power based only on the packet loss rate. Transmission power control is performed based only on the received signal strength in another prior art study. This approach can lead to hidden nodes and asymmetric channel access issues. SUMMARY OF THE INVENTION The present invention is directed to an adaptive algorithm for per-switch transmission power control (TPC) in a powered wireless network, particularly for an IEEE 802.11 wireless local area network (WLAN) in a densely deployed environment. It takes all the time to reduce transmission power to mitigate interference, improve channel reuse and overall network capacity, while meeting the loss requirements of transport 1 and frame (package). Unlike previous transmission power control solutions, the method of the present invention utilizes both received signal strengths 155295.doc 201220899 indicator (RSSI) measurements and frame loss rate (FLR) measurements to determine the most required transmission to the station. Good transmission power. In particular, the method of the present invention is capable of coping with typical hidden terminal problems that are often exacerbated by changes in transmission power and access to the right channel. The design of the method* makes unrealistic assumptions and the solution does not require any modification to existing media access control protocols. The TPC method of the present invention is complementary to any-link rate adaptive algorithm because it mitigates any negative effects of transmission power changes on rate control. These attributes make it possible to conveniently and incrementally deploy the method of the present invention. This paper describes a transmission power control method that optimizes transmitter power to reduce interference, & good channel reuse and overall network capacity, and save energy while meeting the requirements for throughput and packet (frame) loss rate. The method of the present invention intelligently adjusts transmission power based on actively monitoring a plurality of parameters (factors), including received signal strength and frame (packet) loss at the receiver, and a method for determining transmission power The device includes: a first-mode operation until - the first timer expires and receives a first, = exchange heart - the second mode operates until the first: counts: the device expires and Receiving one of the second mode switching messages in the second mode, in response to the self-associated access point receiving = rate level instruction and if the large transmission power has not been received from the associated access point Medium--(4)-transmission power, and in the mth of receiving, the transmission power is transmitted from the associated access point μ power level command and in response to a frame transmission loss rate 155295.doc 201220899 It is determined that one of the transmission powers is applied to the largest one of the recognitions. A method and apparatus for a port-to-transmission power measurement report request, including a received transmission power measurement request, measuring a received signal strength, estimating a loop margin (_(4), and responding to the The transmission power measurement request transmits a transmission power measurement report including the measured received signal strength and the estimated downlink key margin. The method and apparatus for determining a transmission power are also described herein. The packet operates in a first mode until a first timer expires and a mode switch message is reached, and the second mode operates until the second timer expires and is received - the second mode switch One of the messages, and wherein in the first mode, the downlink transmission power is one of the maximum transmission power and one of the downlink transmission powers t is determined in response to a received signal strength, and Further, in the second mode, the downlink transmission power is determined in response to the frame transmission loss rate and the received signal strength, and further wherein in the second mode, Determining one of the aggregated downlink transmission powers for all associated UEs and determining one of each link downlink transmission power for each associated client. [Embodiment] The present invention is described in detail below and incorporated by reference. The present invention is best understood using the IEEE 802 Π Wireless Local Area Network (WLAN). However, the present invention can be used in other wireless networks. In the past few years, In campuses, shopping malls, hotels, airports, apartments, 155295.doc 201220899 floor and homes, 'wireless local area network (WLAN) deployment has rapidly increased. More and more affordable new technologies (for example, IEEE 8〇2.1 In) making it possible to deliver multimedia content over a wireless network and this drives the technology further into people's daily lives. The number of available wireless channels is limited (3 non-overlapping channels in the 2.4 GHz unlicensed spectrum and Up to 24 non-overlapping channels in the 5 GHz unlicensed spectrum), so these available channels must consist of several access points (Ap) and numbers The station (STA) or WLAN uses a common multiple of example, one having a dense deployment of the WLAN multi-dwelling unit _υ) (eg - apartment building or hotel), the transmission between different cells tend to interfere with each other. This will negatively impact the aggregated wireless network throughput and thus the quality of experience for applications such as multimedia streaming. Figure la shows an example deployment scenario. Use a satellite TV-ip (Internet Protocol) gateway - a billion-bit Ethernet backbone and ieee 8〇2 u AP to spread high-definition (10) video to a building (for example, a hotel) Or the wireless video converter (STB) in the apartment building. Multiple adjacent aj^sta in the vicinity leads to severe inter-cell interference. The existing Ap has a preset factory setting that the terminal user rarely changes. Therefore, there is a need, for example, to transmit power control-automatic operating parameter adaptive methods to adaptively operate the environment and optimize the overall network to demonstrate another deployment scenario in which two of the non-infrared network delivers content. In this case, the gateway receives the inner valley (including (but not limited to, 立·) θδί1, video and multimedia data) via the connection of the stalker, the road or any other resource. The gateway has a channel s s ^ negative channel selection and power control process and method. Methods such as 155295.doc 201220899 include the ability to perform link measurements to achieve transmission power control and channel selection. The gateway can be a master video converter. Transmission Power Control (TPC) is dedicated to using a minimum transmission power that achieves successful transmission while meeting a data rate requirement. An effective design is challenging because it must take into account the interference effects of different network topologies and deployment scenarios, such as hidden nodes and two operations on the same-frequency it. Channel access asymmetry between links. To illustrate these effects, Figure Bu summarizes the interaction between the two transmitter (Τχ)·receiver (4) links. In the circle lc, one of the solid arrows of tTX to Rx indicates the communication range of the RWTx. From the TXUTXR_dashed line; the header (--) indicates that τχ1 can be sensed by 载波2 (i.e., Τχ1 is in the interference range of Τχ2). When the TPC method of the present invention is applied to a link, it can result in any of the situations presented in Figure lc. Case (4) indicates that the application of Μ causes the full space reuse (i.e., Τχ1 can be transmitted to the same case as W transmission to Rx2 at the same time). Case (b) indicates that there is no gain for space reuse's, but if it is possible to maintain the target data rate, the lowest possible transmission power operating system is the smart choice. The links Tx 1 _Rx i and W share the same channel. Case (4) indicates channel access asymmetry. The Txl_>Rxl key is insufficient, because Τχ2 cannot sense the transmission of Τχ1 and is always perceived—no interference frequency C and transmitted to RX2. Tx 1 always senses that the frequency is too busy and cannot be transmitted. Case (4) also results in channel access asymmetry, but the problem indicates itself in the form of packet loss at Rju, since Τχ2 is transmitted during transmission. Case (4) represents a typical hidden terminal problem. Transmitter ΤΗ 155295.doc 201220899 Τχ 2 is not in the carrier sensing range of each other, but the receiver Rx is still

The interference range of both Tx2. When Τχ 2 is transmitting, Τχ 1 can sense a non-interfering channel and transmit to Rxl. The transmission from Txl and Τχ2 collides at Rxl and Rx1 does not receive the packet correctly. In case (1), Τχ〗 and Τχ2 pairs

Rx 1 and Rx2 are hidden nodes, and then because the simultaneous transmission of both Τχ1 and τχ2 'packet loss can occur at |^1 and 11? (2. This prior art cannot account for the situation (c), (d ), (e), and (1), because the prior art method relies on only one trigger, the received signal strength (RSSI) measurement or frame loss rate (FLR) measurement frame (packet) loss rate (FLR) Measurements. In fact, their previous transmission power control methods tend to aggravate hidden nodes and asymmetric channel access problems in cases (c) (d), (e), and (f). The right control power solution is based only on RSSI measurement can not diagnose hidden terminal problems and asymmetric channel access problems and performance will be degraded due to frame (packet) loss. The solution based on frame (packet) loss rate measurement is not unimportant. The reason for accurately inferring the minimum number of samples required for channel conditions is the critical design choice and the frame (packet) loss rate measurement also takes a lot of time to converge. In the present invention, the description is based on RSSI measurement and FLR measurement. One of the two adaptive per link T PC solution. The method of the present invention addresses all of the above scenarios and solves the problem of hidden nodes and asymmetric channel accesses, which quickly converges to the optimal transmission power to be operated by it. In addition, the sinking method of the present invention and any rate (4) The algorithm complements each other because it can gradually reduce any negative impact on rate control. In the present invention, in order to determine the transmission power, an AP requests its associated 155295.doc 201220899 wireless subscriber (station (STA) Each of the mobile devices measures the received signal strength, reports the received signal strength (7) "^ and / or its estimated link margin and the current transmit power of the UE. Link Linkage The channel SNR or the difference between the received (available) channel signal-to-noise ratio (SNR) or RSSI and reliable communication (which satisfies the packet loss rate and the link transmission data rate requirement). In multicast, the AP periodically transmits the transmission. The power control (TpC) measurement request message to its associated client or in unicast, Ap periodically sends a Transmission Power Control (TPC) measurement request message to the mother of its associated client - In addition, once associated with a new client, the request is sent to the new client. The requested client receives the request to measure the received signal power, estimate the downlink margin, and Sending a C measurement report message to report the received signal strength and/or the estimated juice boundary limit and its transmission power to the Ap. Here, the τ line link is self-transmitted to the user terminal (4) And the uplink (4) self-service terminal to the transmission link of the Αρ. The following describes the link edge estimation. The Αρ and the UE also measure the packets on the downlink and uplink respectively. The transmission loss is measured by the received signal strength or the key edge 2 and/or frame (packet) loss reported by the user (station), and the ΑΡ determines its required downlink, and transmission power. This transmission power will satisfy the throughput and packet loss rate requirements while causing minimal interference to other adjacent materials. The Α ρ also determines its transmission power of the associated UE and indicates that the power determined by the UE is used for uplink transmission. Figure a is a transmission power control (Tpc) measurement operation from the perspective of 4ΑΡ. I55295.doc 12 201220899 A flow chart. At 205, the TPC measurement ancestor & ’ s 's ten-time Tm is set. It should be noted that for the example embodiments herein, .7 is used for all timers, and an incremental 3 octave or decrement timer can be used. At 2 ,, a test is performed to determine if the timer has expired. If the timer is still full, then a test is performed at 215 to determine if a new client a (the station σ) has been associated with the Ap. If a new client has not been associated with the AP, processing continues to 21〇. If the new client has been associated with the AP, then at 22 ,, a measurement request is sent (forwarded) to the newly associated client. Then processing continues

Order to 210. If the timer has expired, then at 225, the AP sends the TPC to all its associated clients. False (four) _ has associated client. Figure 2b is a flow chart of the Tpc measurement operation from the perspective of the user. At 230, the merchant receives a Tpc measurement request. This measurement request can be received because the timer in the AP expires or because the client is associated with a new one. At 235, the UE (station, terminal) measures the received signal strength of its downlink. At 2峨, the terminal (station, terminal) estimates its downlink margin. At 245, the UE sends the results (downlink margin and signal strength received by the downlink link) to its associated port. The false δ and δ hai client have been associated with a Αρ. The TPC method of this month is used to control the transmission power as low as possible, while maintaining the target data rate scale and a target packet loss rate. In the real [m embodiment, the target data rate is set to the transmitter and the receiver: the highest data rate supported by both. The reason for this is that the transmission time of the frame is minimized so that the transmission time of the frame is minimized so that 155295.doc -13-201220899 minimizes the time that one transmitter interferes with other devices. The target packet loss rate can be set to the same value as the value used to determine the sensitivity of the receiver to the target data rate or small enough to ensure a value for the quality of service. Receiver sensitivity is the minimum received signal power (intensity) required for a target link data rate and a target packet loss rate. The target data rate and/or other values of the target packet loss rate can be selected in different ways. In order to maintain the target data rate of the user terminal, the target downlink received power pri is equal to the target Pri=Sti+O (1) where ~ the receiver is sensitive to the target data rate and the D is beyond the receiver. Sensitivity to compensate for the fluctuations in channel conditions. It is a configurable parameter. Note that the units in the above equations and equations below are decibels unless otherwise specified. If the path loss is , the target transmission power is s^Pti=Li+Sti+D=Ii+D (2) where / is defined as /, ·=£〆&,·. In the Tpc report from the user side, (receiver, station), the margin M,. (7) is M.Pri(j)-Sti (3)

The value of power. Then the yth sample of the person is the first _/ of the power - the received letter sharp

Its Trti(1) is the actual transmission power of the jth Tpc request. I55295.doc 201220899 The AP or station can select the value of the target data rate in different ways. The target data rate can be determined by notifying the stations. One method of notifying the station of the target data rate is to include the target data rate value in, for example, one of the TPC request control messages. Another method is to transmit the TPC request at the target data rate. If the target data rate is the rate at which the TPC request is sent, then the value of the link edge limit (i.e., the receiver sensitivity used to calculate Μ in equation (3)) is the value of the data rate at which the Tpc request is transmitted. The value of Μ, which is a function of receiver sensitivity, should be calculated based on the target data rate (i.e., to calculate the sensitivity of the receiver sensitivity receiver to the target data rate). In the alternative, the target data rate can be configured, for example, it can be set to the maximum data rate supported by both the transmitter and the receiver. The present invention uses a linear estimation method to calculate /,. Ave/, (j) = ax ave^ (j -1) + (1- a)/( (j) (5) ^ i (j) =1 h (j) - aveJj (j) | (6) var /, (j) = x var /, (j -1) + (1 - /3) Δ / ( (j) (7) where represents the smoothed chain after the 7.th tpC measurement report from the receiver Road quality /, (path loss plus receiver sensitivity), that is, the estimated value of the average value. var /,. (X) is the smooth average deviation of the link quality person. △ person = l person 丨The difference between the y-est measured value and the current estimate of the average value obtained. Both ave (7) and var +... are used to calculate the estimated value of the plant. The estimated value is equal to Λ (;) = Avelt (j) + <7 x var (j) (8) where a, β and g are configurable parameters. 155295.doc -15- 201220899 The new required transmission power of the client/new is equal to Λ/= //+£) (9) When the AP transmits the data packet (frame) to the client z. or the destination beer, and uses equal to the transmission power 1, ie, by the user or by (4) the address or by the wireless link. Controlling transmission power. Different transmission power values are used for different UEs (receiver or destination address). Alternative implementation of the present invention In the AP, the AP does not change its transmission power according to the UE. The AP determines its transmission power based on the worst user. It selects a transmission power value to ensure that the downlink (four) receives the W strength at its most affected end. For the user, it is high enough to successfully decode the received frame transmitted at the data rate. If the multi-gate is associated with an AP, the transmission power of the AP is P, =max{ />„.} (1〇) When the -AP is turned on, the initial value of its transmission power is the maximum supported (permitted) power, that is, Q(9)=max/» (11) When a new client is turned on When the power source is associated with the AP, the Ap uses the maximum supported (permitted) transmission power of the 'ten' Xiao household as its initial value. ^//(〇)=max p (12) In addition, 'when a new one When the client is associated with the Ap, the Ap is issued for this new client after its associated process is completed - Tpc request (see Figure 2a) A sudden deterioration of the quality of the link (channel) or link (channel) On (for example, I55295.doc 201220899) 'If the user moves away or there is interference caused by the receiver side interference In response to the increase in the frame (packet) loss, the Ap also monitors the loss count (rate) of the packet (frame) transmitted to its client and adjusts the transmission power based on the packet (frame) loss rate. In an exemplary embodiment, the Ap periodically periodically transmits its frame (packet) loss rate (flr) for its downlink transmission to a client. If during the time interval (for example, X seconds), a user's moxibustion flr(4) is greater than a high threshold (4), that is, FLR (_F, then the Ap adds a value p to the transmission power of the user terminal, The current AP transmission power system used for the transmission from the Ap to the user moxibustion is used for the maximum transmission power supported by the (submitted) new transmission power system P^^Ap of the user-delivered Ap transmission. The smaller value, that is, the new transmission power system ptk = min{Ptk + pd> max pj (1)) Since the transmission power at the AP is changed to account for the sudden deterioration of the link quality, the eight? Continue to monitor flr(4) periodically as described above and adjust the transmission power at the AP until the frame (packet) loss rate is below the low threshold LFTW', i.e., coffee (4) (10) (4). If (4)(4) is less than LF· for a certain time interval (for example, less seconds), then the Ap uses its transmit power reduction value and uses it for the new transmission power system of the user terminal. The minimum transmission power supported by Ap - the largest of the households, that is, the new transmission power system ^tk~max{Ptk-pdi min pj (Η) Mountain ΑΡ continues to orphan Flr (4). As a prevention mechanism for avoiding repeated switching between two power levels (4) < LFT(4) 155295.doc -17- 201220899 and LR(4)HFT(4) when there is continuous interference or user-side movement or channel condition fluctuations, when FLR (〇<LFT(4) Can be assigned from - higher power level to - lower power level transition - conversion probability (less than υ. resistance (4), LFTW, 匕, X and system configurable design parameters. ~ may not be for its associated client Each of the individual records the frame (packet) loss rate statistics. In an alternative embodiment, the A p does not change the frame (packet) loss rate of the transmission to the client. The transmission power of the user is determined. The gossip determines its transmission power based on the summary flr. The Hai AP periodically determines its signal insertion (and & loss) for its downlink transmission to all its associated users. Rate (FLR). If the FLR during the time interval (for example, & X seconds) is greater than a high threshold Ηρτ, that is, flr>hft, the _AP will be to each of its associated clients. The transmission power is increased by a value For the transmission from the AP to the UE, the AP transmission power is supported by the new transmission power system Ρ/Α +^ and ΑΡ for the Ap transmission to the subscriber female (permitted) The smaller of the maximum transmission power WC2X household, that is, the new transmission power is Ptk = min {Ptk + pd > max pj (13a) due to changes in the transmission power at the AP to account for sudden deterioration of link quality Therefore, the ap continues to periodically monitor the FLRa to adjust the transmission power at the AP as mentioned above until the packet (frame) loss rate is lower than the low threshold LFT 'that is, 'FLRCLFT. If the FLR is less than the LFT For a specific time interval (for example, a small number of seconds), the Ap will reduce its transmission power to each of its associated clients^ and use it to the user to avoid the transmission of 155295.doc •18·201220899 The new transmission power system and the larger of the minimum transmission power _ p supported by the AP, that is, the new transmission power system Ptk~max{Ptk-Pd) min pj (14a) The AP continues to monitor FLRe as a avoidance Two power levels in the presence of continuous interference or user-side movement or channel condition fluctuations (One power level is flr<lft and another power level is FLR>HFT). One of the prevention mechanisms for repeated switching 'When FLR<LFW can give a higher power level to a lower power level The transition assigns a transition probability (less than HFT, LFT, user rf, text, and less configurable design parameters. An exemplary embodiment supports two modes of operation at the AP. In mode ,, the AP only The received signal power (rssi) obtained from each of its individual clients in a TPC power adjustment interval (timer ^) and the transmission power operation determined by the measurement report of the key margin measurement, That is, modulo 4·1—household, (magic= see, (15) which is determined using equation (9). If the quality of the link is suddenly degraded and the terminal kRSS! and the link edge measurement report are lost in a specific time interval (expiration timer Te), the Ap uses the maximum transmission power for the user to use to the client. Transmission. In mode 2, the AP periodically monitors the FLR (using the adjustment timer Ta) individually for each of its clients, for the client-side moxibustion FLR (4) or to all of its associated clients (4) The summary frame loss rate (FLR) of the road transmission. The greater of the power t calculated by the transmission power determined by the measurement report from each of its clients, ie 155295.doc •19· 201220899 mode 2_Pt(k)=max{A , ptk}, (16) where ' = l D is determined by equation (9) and if the packet loss of each client (station) is monitored, Ptk is determined by equations (13) and (14), or Monitoring the total packet loss of all clients (stations) is determined by equations (13a) and (14a). An AP can use one of these modes to determine its transmission power. Another option is that -AP can operate in two modes in a time sharing mode. That is, an AP switches to mode 2 after it has been operating in mode 达 for a period of time. An AP switches from mode 1 to mode 2 after it has been in mode 丨 for a period of time τι or has received a mode 丨 to mode 2 switch message from one of its neighboring APs. When an AP switches from mode to mode 2, the Ap will instruct its mode change mode to switch the message broadcast (multicast, broadcast) to its neighboring APs and their associated clients to announce that the Ap is now in mode. 2 operation. The AP also updates (resets) its timer 仞. Similarly, an Ap switches to mode after it has been operating in mode 2 for a time period T2 or has received a mode 2 to mode 1 switching message from one of its neighboring Ap commands and multicasts a mode switching message ( Broadcast, spread) to its neighbors. An Ap updates (resets) its timer T1 and broadcasts (multicasts, propagates) the mode switch message to its neighbors and its associated clients to announce that the AP is now operating in mode. In this way, the operational mode of the adjacent (adjacent) Ap is loosely synchronized. By operating in two modes in a time sharing manner, the method of the present invention effectively handles hidden node and asymmetric channel access problems as described below. In a first real money, test 4 ticked the mode i Tpc operation and used only 155295.doc •20- 201220899 to the link quality of the user terminal such as β (received signal strength and key edge π measurement report) One of the low-passing powers, but the other Αρ(Αρ2) does not perform power control at all and always uses high power. ΑΡ2 is called a non-cooperative jammer. ΑΡ2 interferes with its transmission, but Αρι does not interfere with the transmission of Αρ2, this Resulting in asymmetric channel access conditions. Αρι is hidden from Ap2. By switching to mode 2, if the frame (packet) loss rate of AP1 is unfair due to collision or asymmetric channel bandwidth sharing If the value is high, the API increases its transmission power. If the channel capacity (bandwidth) obtained by Αρι is unfair due to the low transmission power used by the API and is less than its traffic load, its frame (packet) loss rate In mode 2, Αρι increases its transmission power to obtain its fair channel bandwidth share. In a second instance ten, packet (frame) loss can be caused by congestion or link transmission errors. Due to link transmission When an error occurs, it is desirable to increase the transmission power. On the other hand, if the packet loss is due to congestion, increasing the transmission power will not help and may increase the congestion problem due to interference. For example, consider the pair of two Aps and stations ( Ap_>STA1 AP2 STA2). These pairs operate in mode 2 Tpc, which therefore does not interfere with each other according to the use of low transmission power. If Ap2 increases its transmission power to react to the sudden movement of STA2, then §ται The loss of frame (packet) due to packet interference and collision (due to interference from AP2) caused the transmission power of AP1 to increase. The two pairs that start to interfere with each other and even worse can abandon the total traffic load can be heavy, resulting in congestion. If only TPC mode 2 ’ is used, even if STA2 returns and is close to Ap2, the transmission power of Ap2 is not reduced due to continuous interference and packet loss. By synchronously switching to mode, the two Aps will reduce their respective transmission power based on the quality test report from their associated user #. Therefore, the APs and their associated clients (stations) will no longer interfere with each other. If the traffic on each AP is less than the channel capacity, the congestion condition is removed. Furthermore, later when the APs switch from mode to mode 2, the APs will no longer interfere with each other, the packet loss rate remains low and it will not increase its transmission power. 3a and 3b are flowcharts of the AP (Summary) Transmission Power Control (Tpc) program (operation mode (2) according to an exemplary embodiment of the present invention. Circle 3a and FIG. 3b are independent threads or processing procedures. Operation, but the data generated (established) or updated by the operation thread or processing program can be obtained by other operating threads or programs and can be used by it. At 3〇5, Ap sets the loss rate of two frames (packets). Limit values (HFT and LFT) and setting a frame (packet) loss rate measurement timer (Up_timea D〇wn_timer). In this exemplary embodiment, both FLR measurement timers are countdown timers, but It can only {easily and conveniently count up the chronograph. At 31 ,, a test s is performed to determine if a Tpc report has been received. If a -TPC report has been received, then at 315, The Ap estimates the uplink path (link, channel) loss of the client moxibustion. At 320, the AP targets the downlink side of the user (the (4) TPC report received) and the uplink path (keyway) , channel) loss stored in the database In memory, buffer, or any other storage medium. At 325, the AP estimates the required (target) downlink transmission power for transmission to the UE. At 33, the estimate Target (required) uplink key transmission function for user transmission (155295.doc -22- 201220899 rate. This is used by the operation thread shown in Figure 3b (395) and for user 鳊A The client process set up and sent to this Ap continues to 310. If a Tpc report has not been received, then at 335 the Ap determines the frame (packet) transmission loss rate (FLR) of the downlink transmission. Perform a test at 34〇 to determine if the FLR is greater than or equal to the high frame loss rate threshold (HFT). If the FLR is less than the high frame loss rate threshold (hft), execute one at 360 The test determines whether the FLR is less than or equal to the low frame loss rate threshold (LFT). If the FLR is less than or equal to the low frame loss rate 6a limit (LFT) ' then at 365, the Up_timer is reset. A test is performed at 370 to determine if the Down-timer has expired. If wn_Umer has not expired, the process proceeds to 31. If D〇wn_timer has expired, then at 375, the AP estimates that the transfer function for each user-free transmission is PpLRk = max{Ptk_Pd , min p}. This also sets an I new flag and resets both Up_timer and D〇Wn_timer. Then, the process proceeds to 310. If the FLR is greater than the low frame loss rate threshold (LFT), then at 38〇 The AP resets both Up_timer and Down_timer. Processing continues to 310. If the FLR is greater than or equal to the high frame loss rate threshold (hft), then at 345, the AP resets the Down_timer. At 350, a test is performed to determine if the Upjimer has expired. If gUp_timer has not expired, processing proceeds to 310. If the Up_timer has expired, then at 355, the AP estimates that the transmission power for each user's moxibustion transmission is (10). The AP also sets - updates the flag and resets both Up_timer and Downjimer. Processing then continues to 3 丨〇. The method described above is used in conjunction with Figure 3b. 155295.doc •23- 201220899 Referring again to Figure 3b, Mingnan is at 385, which sets the Tpc Ta. At 390, 耔 耔 Η Η Λ ί ί ί ί ί ί 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 蜮 TP TP TP TP TP TP TP TP TP TP TP TP If the update flag has expired or not set, the process proceeds to 390. 2 (4) If the U has expired or if the update flag is set, then at 395, : is used for each user-like transmission under the downlink The transmission power setting is: inverse:; " and the estimated uplink transmission power is sent to the user terminal, and the 4β is updated again. At 301, a test is performed to determine if the TPC power adjustment timer L has expired. If the TPC power adjustment timer Ta has expired, processing proceeds to 390. If the TPC power adjustment has not expired, the process continues to the milk. Figure and circle 3c - an AP transmission power control (Tpc) program (operation mode) using information reported by a user to know link quality (received signal strength and link margin) according to an exemplary embodiment of the present invention (10) A flowchart. Figures 3b and 3c operate as independent threads or handlers, but the data generated (established) or updated by the thread or the handler can be obtained and used by other threads or handlers. At 3〇6, the AP sets the -TPC power adjustment timer Tb and also sets the expiration (expiration) timer Te. At the river, a test is performed to determine whether a TPC report has been received. Upon receipt of a TPC report, at 316, the AP estimates the uplink path (link, channel) loss of the client moxibustion. At 321 (at the memory, the AP shoots the downlink key margin for the user ( In the case of the receipt of the report, and the loss of the uplink path (link, channel) is stored in a database buffer or any other storage medium. In 326 155295.doc -24· 201220899 : pass: trick For the user' The required transmission (target) downlink transmission power f At 331, the AP from the estimated required for purposes of transmission of a user like) the uplink transmission power. This is used by the operating thread in Figure (10) and sent to the user associated with this AP: Continue: Line to 311. If the TPC report has not been received, then '仃-test at 336 to determine if the TPC power adjustment timer 1 has expired and if all the terminals have been lost during the expiration (expiration) time period (interval) kTPC report. If the TPC power adjustment timer Tb has expired in the right expired (expired) time period Te (interval), all the TPC reports from the use of = have been lost, then at 341, the Ap will be used to the user-like input. The power is set to p and the expired (expired) timing is reset. If the TPC power adjustment timer Tb has not expired or if all the users from the user end have not been lost during the expiration (to) time period, the TPC report β is 'executed at 346' to test the Tpc power adjustment. The timer Tb has expired. If the TPC power adjustment timer has not expired, the process proceeds to 311. If the TPC power adjustment timer has expired, then at 351, the AP sets the transmission power for transmission to the user to and resets the TPC power adjustment timer Tb. Figure 3d is a flow diagram of an AP transmission power control procedure operating in mode 1 and mode 2 in a time division manner in accordance with an exemplary embodiment of the present invention; In the mouth. The operation is again performed by the mode 1 and the AP setting mode 1 is operated to steal the T1. A test is performed at 361 to determine if the timer w has expired or if the AP has received a mode 1 to mode change message (from a neighboring AP). When the right timer T1 has expired or the Ap has been received - mode 1 to mode 155295.doc -25 - 201220899 mode 2 switching message (from a neighboring AP), then at 366, the AP switches to TPC mode 2 The TPC Mode 2 is operated and set to operate the timer T2 and a Mode 1 to Mode 2 switching message is propagated (broadcast, multicast) to its neighboring Ap and its associated UE. A test is performed at 3 71 to determine if the timer 2 has expired or if the mode has received a mode 2 to mode switch message. If timer Τ2 has not expired and the Αρ has not received a mode 2 to mode i switching message, then at 376, a test is performed to determine if the mode has received a mode 1 to mode 2 switching message. If the Ap has not received a mode switch to mode 2 switch, the process proceeds to 3 ιι. If the Ap has received a mode 1 to mode 2 switching message, then at 3 8 ,, the Ap resets the Tpc mode 2 operation timer T2. Processing then proceeds to 371. If the timer 2 has expired or the AP has received a mode 2 to mode switch message, then at 396 'violation AP switches to TpC mode 丨 operation and sets Tpc mode 丨 operation timer T1 and will - mode 2 To mode (1) knife exchange message propagation (broadcast, multicast) to its neighboring AP and its associated client. Processing continues to 361. If the timing (10) has not expired and the AP has not received the mode i to mode 2 switching message (self-adjacent AP), then 'execute-test at 386 to determine if the ^ has been received - mode 2 to analog Decrease the message. If the mode has not received a mode 2 to mode 1 switching message, the process proceeds to 361. If the ^ has received a mode 2 to mode 1 switching message, then at 391, the /P resets the tpc mode! Operate the timer T1. The process then proceeds to, in another exemplary embodiment, to each of its associated clients, in mode 2 operation, the Ap performs the frame individually for the transmission of the person (封155295.doc •26 · 201220899 package) Mussel loss rate measurement, ★ Loss rate capital n, 卩, the AP dimension (4) in each link frame (packet) recently transmitted to 1 related body, to measure the packet loss rate ' The AP maintains the transmission state: the window 坳=1, 2, ...) of the object frame is right for the user side, the frame (package) loss rate moxibustion h PWT' then the Ap adjusts its transmission for transmission Power, where the number of frames lost or retransmitted by an AP transmitted to the User 2 = :: box. If the user transmits the power of the second AP transmission power system, it is used for the transmission of the user's moxibustion μ transmission (including the configurable design parameters) and the maximum power supported by the _ρ. One of the smaller values is Ptk = min{Ptk + Pd} max py (17) Since the transmission power at the AP is changed to account for the sudden deterioration of the link quality, the AP continues to be as mentioned above. - Timer I periodically monitors FLRk and adjusts the transmission power until the #packet (frame) loss rate is below the low threshold LFT, that is, FLRk < LFT. If it is smaller than the LFT, the AP will reduce the transmission power to the user terminal, and the new transmission power for the AP transmission to the user terminal k is the minimum transmission power supported by the user and the AP. The larger, that is, the new transmission power system Ptk = max{ Ptk - Pd) min P} (18) The AP continues to monitor FLRk. As a prevention mechanism to avoid repeated switching between two power levels (FLRk < LFT and FLRk > HFT) when there is continuous interference or user-side movement, when FLRk < LFT, it can be given a higher power level A transition to a lower power level assigns a transition probability (less than 1).乂, hft, LFT, heart and 155295.doc -27· 201220899 Less configurable design parameters. 4a and 4b are diagrams showing when Ap has information about the loss rate and link quality (received signal strength and link quality) of each key frame according to an exemplary embodiment of the present invention. Flowchart of one of the AP Transmission Power Control (TPC) procedures (Operation Mode 2). The diagram and the map servant act as independent threads or handlers, but the data generated (created) or updated by the operation thread or handler can be obtained by other operation threads or handlers and can be used by them at 405, ^ The AP sets two frame (packet) loss rate limits (HFT and LFT) for a user-side moxibustion, and sets the frame (package &) transmission loss rate ^ LR k. And set the frame (packet) loss rate measurement window 4, and initialize two ten devices * 0 ^ ^ a 0. It should be noted that although the material count H is an up counter in this exemplary embodiment, it may simply be a decrement counter. At 410, a test is performed to determine if a Tpc has been received. . The right has received the -TPC report' and at 415 the Ap estimates the loss of the uplink path (link, channel) of the subscriber. In the example, the Ap is for the user to store the downlink key margin (the link path (link, channel) in the Tpc report is lost) in a database (in the memory) , in a buffer or in any other healthy media). At 425, the chirp estimate is used for the desired (target) downlink transmission power to the user-like transmission. The α ρ is estimated for the target (required) uplink from the user's transmission =: power. This is called the operation thread shown in the figure, and 41用户 = the user terminal processing associated with this (4) continues to . If the right has not received the -TPC report, it is determined at the milk department to determine whether there is a frame to be transmitted to W (package; if ^ 155295.doc •28· 201220899 is to be transmitted to the client 4. If there is a desire to transmit (package) , the processing continues until the user is free of the frame (packet), the AP update for the user, the transmission status of the ^, adjust % and if the user acupuncture ^ transmission failure, adjust ^ at 445, execute - If the measurement terminal b is greater than or equal to 沁若丨疋沁疋, and the right 沁 is less than 沁, then the process continues to 41〇. Right 沁 is greater than or equal to ΛΤ 1〇 box _ transmission loss two::=r message: To determine whether the frame (packet) transmission loss rate is greater than or equal to :::: = loss rate threshold (HFT), frame (packet) transmission loss: rate small Hainan frame transmission loss rate threshold ( HFT), at 455 'execution~ test to determine 兮1 Μ γ 4 _ Wib binding, (7) whether the transmission loss rate is less than or equal to the low transmission loss rate threshold (LFT) i frame (low Frame transmission loss rate threshold (LFT), then at 458, processing continues to 41 〇. If the frame (packet) transmission or 4 in the low frame transmission loss rate threshold (LFT), then at 460 'this ap estimate is used to prepare a r for the parent user, the transmission transmission power is in m ton a. The Ap also sets an update flag and resets: both horses. Then the process continues to 41. If the frame (sealing = loss rate is greater than or equal to the frame transmission loss rate) The limit is transmitted at 465, and the AP is estimated to be used to transfer the power of each user's moxibustion to ^~. The ^ also sets an update flag and resets both ^ and '' Using the method described above. Adjusting the meter again Referring to Figure 4b, at 470, the AP sets the TPC power 155295.doc -29-201220899 time Te. At 475, a test is performed to determine if the device Tc has Expiration or μ setting material (4) Leaf timer Τ. Expired or if no update is set == The TPC adjustment timing ^ Then the processing continues to enter 彳 5 5 475 mPc adjustment timer Te has expired or if it is at 480, The AP will be used to set the transmission power to ·-two ==7 link: pass: send - two ==: chain 2 set a test to judge UTPC work Whether the rate adjustment timing π has expired. Right when the tpc power adjustment timer Te has expired, the processing proceeds to two: the TPC power adjustment timing is not yet expired, then the processing continues to enter the AP and can also control its correlation. The transmission power of the uplink user. The target data rate and the target packet loss rate of the uplink may be different from the target metric rate and the target packet loss rate of the downlink key. As an example embodiment, the highest supported data rate is used as the The target uplink data rate, and the target packet loss rate is set to the same value used to determine the sensitivity of the receiver to the target data rate or small enough to ensure a value for the quality of service. Other values for the target data rate and/or target packet loss rate can be selected in different ways. Note that the quality of the uplink and downlink can be asymmetric. For a UE/' to guarantee the target uplink data rate without packet loss, the target received power p... at the AP is equal to SM Pun=Suli+U (19) where UAP is sensitive to the target data rate. The degree of the J^ system exceeds the uplink threshold of the 155295.doc •30·201220899 receiver sensitivity. (10)—Can be (state design parameters (20) If the path loss of the uplink switch is human, the target user transmit power is the target Puti-Lui+Suti+U ----

Lu "P uti_P uri Once again, use Lui. (21) A linear estimation method to calculate the uplink path loss av^ui ϋ) = σ X aveLul (j -1) + (1- a) Lu, 〇) ( 22) (j) H Lui (j) - aveLui (j) \ (23) var Ki U) = ω x var Lui (j -1) + (1 - ω)^ 〇) (24) From the yth tpc The estimated value of the reported Zai• is equal to

Ki (j) = c^eLui (j) + C X var Lui (j) (25) where σ, 1 and c are configurable design parameters. New uplink transmission power equals

An = Lvi + Suli + U (26) The message can be used to indicate that the client is using the new transmission power by sending a message to the client. The message can be in a beacon or some other frame (eg, management) Or in the control frame). In an alternate embodiment, the UI may wish all clients to use the same transmission power for the uplink. Then, the Αρ determines the uplink transmission power based on the worst user side. If the multiple client is associated with a Αρ, the uplink transmission power is 155295.doc -31- 201220899 (27)

Pu, = max{Puli} When a client is turned on, its initial power can be the maximum supported power of the client. Alternatively, it may be the maximum allowed (permitted) transmission power or the maximum supported power and the maximum allowed transmission power specified in the Ap beacon or the discovery response, ie A (9)=min {max P„_suppw,max (4)/w} (28) The new client (just turned on) will use this maximum power for correlation and transmission until it successfully receives the AP's instruction to change its transmit power. When the new client is associated with an AP, the Ap issues a -TPC request for the new client after the associated process. After receiving the TPC report from the client, the AP determines and adapts the uplink and downlink. Link transmission power. The use-management (control) message develops the updated uplink transmission power to the UE or advertises the updated uplink transmission power in the beacon to indicate that the user uses the updated (new) The transmission power value is used for uplink transmission. For sudden deterioration of link quality or link loss (for example, if the UE moves away or is interfered by the receiver side at the AP) (frame): Loss Make In response, the UE also monitors its frame (packet) loss rate and base; the packet loss rate adjusts the transmission power. In an exemplary embodiment, the UE transmits to its associated AP uplink transmission cycle. Sexually determine its frame (packet) loss: (FLRc). If a time interval (for example, X seconds) period; in a threshold HFTC 'FLRC> HFTe, the user adjusts its uplink The transmission power of the channel. If the current uplink transmission power of the client* is 155295.doc -32- 201220899, it is used for the user of the AP, and the new transmission power of the uplink transmission is transmitted to the user terminal. The maximum (four) way power allowed (supported, permitted) is the smaller of ^, that is, the new transmission power is Putk=zmin{Putk+Pud> max Puk} (29) due to the user end The transmission power is changed to account for sudden degradation of link quality, so the UE continues to periodically monitor the FLRe and adjust its transmission power as described above until the frame (packet) loss rate is below the threshold LFTe , that is, FLRe < LFTe. MW is less than For a specific time interval (for example, just after the user transmits its uplink key transmission power reduction value Pud and the user terminal fills the new transmission power of the uplink key transmission line, the minimum transmission power center supported by the Push_PJ client end The larger value in ^, that is, the new transmission power is PUtk = max{ Putk-Pud, min Puk} (3〇) and the client continues to monitor FLRc as a avoidance at two power levels (one power level) One of the prevention mechanisms of repeated switching between FLRc<LFTc and another-power level flRc>hfTc), when FLRk<LFTc can assign a transition from a higher power level to a lower power level transition Probability (less than 1). HFTc, LFTc, and especially;; configurable design tuning parameters. Similar to the AP, the client can support two modes of operation. In the first mode, the UE selects to operate with the transmission power for which the gossip is determined, the transmission power being measured based only on the received signal strength. That is, Μ4, \_Pul(k)^pulkt pi) where C is the AP based on the received signal strength measurement to determine that the station is using I55295.doc -33- 201220899 and the power is available. (26) 'or if the per-cell pass power control is used;" in mode 1, if the downlink quality suddenly deteriorates and is in Wang 2 27). In the interval, the loss of the power setting decision from the AP is lost, and the maximum transmission is supported by the UE using the allowed tH. "*Used in the second mode" is used by the client to monitor the FLR and use the power setting of the AP to determine the determined = and the maximum of the power calculated as the result of the FLRc measurement. The link transmission is set, that is, the transmission power in mode 2 is set to -mode 2_Put (kbu max{?uik, first, (32) where 4 is determined by equation (26) or (27) and ' is determined by the parties (29) and (30). "" The user can determine the transmission power in the (four) mode. The other option is 'the client can - the time sharing mode with two Mode operation. That is, the UE switches to mode 2 after it has been operating in mode for a period of time 3 or has received a mode i to mode 2 after receiving the mode. Similarly, it is in its Switching to mode 操作 after mode 2 is operated for a period of time 4 or after receiving a mode 2 to mode 丨 switching message from the ΑΡ. If the user receives a mode 丨 to mode 2 switching message from the ΑΡ and it has Operate in mode 2, then reset its timer Τ 4. Similarly, if the client °HΑΡ received a mode 2 to mode 1 switching message and it has been operated in mode] then it resets its timer 3. Figure 5a is a user terminal transmission power control 155295 according to an exemplary embodiment of the present invention. Doc -34- 201220899 (TPC) program (operation mode 2) one of the flowcharts. At 505, the client sets two frame (packet) loss rate thresholds (HFTc and LFTc) and sets the frame ( Packet) loss rate measurement timers (Up_timer and Down_timer). In this exemplary embodiment, both FLR measurement timers are countdown timers 'but it can simply and conveniently increment the timer Performing a test at 510 to determine if a TPC setting has been received from the associated Ap of the client. If a tpc setting has been received, then at 515, the client is based on an association from the client. The AP command determines the uplink key transmission power and sets the uplink transmission power to = μ, and then the process proceeds to 5 j. If a TPC setting has not been received, then at 520, the UE determines the uplink. Link transmission (Packet) Transmission Loss Rate (FLRc). A test is performed at 525 to determine if the FLRc is greater than or equal to the High Frame Loss Rate Threshold (HFT). If the FLRc is less than the High Frame Loss Rate Threshold (HFT) And, at 530, 'perform a test to determine if the FLRc is less than or equal to the low frame loss rate threshold (LFT). If the FLRc is greater than the low frame loss rate threshold (LFT)' then at 535 At this point, the client resets Up_timej^. The process then proceeds to 5. If the FLRC is less than or equal to the low frame loss rate threshold (LFT), then at 540, UP_timer is reset. A test is performed at 545 to determine if the Down_timer has expired. If Down_timer has not expired, processing continues to 51〇. If the Down-timer has expired, then at 55 此, the UE estimates that the uplink transmission power for the transmission to the Ap is p λ "丨 = then 4 households ... corpse corpse " " °Xu user $ also resets both Up_timer and Down_timer. At 555 155295.doc -35- 201220899, the client sets the transmission uplink transmission power to p...=/wajc 'hss/ J. If the FLRc If the greater than or equal to the high frame loss rate threshold (HFT), the user resets the Up_timer at 56 。. At Μ, a test is performed to determine whether the Up timer has expired. If the Up_timer has not expired, Then the process proceeds to 51 (^ If Up) the imer has expired, then at 570, the UE estimates the uplink transmission power for the transmission to its associated eight to be pPLR uk=min{Putk +Pd,max Puk}. This client also resets both Up_timer and Down_timer. The process then proceeds to 5 5 5. The method described above is used in conjunction with Figure 5b.

Figure 5b is a flow diagram of a user transmit power control procedure in mode (10) in accordance with an exemplary embodiment of the present invention. At 575, the client sets a tpc expiration (expiration) timer Tue. At the end, a test is performed to determine if the client has been associated with it. If the client has received a kiss from its associated (4), the client is receiving the user's associated message based on the client. The command determines the uplink transmission power (household (four) "). At 59 ,, the client sets the transmit power for its uplink transmission (to its associated Ap) to the home, two ~. Then, Processing continues. If the client has not received the _ TPC setting from its associated AP, then at 丨,,, ^, at 501, a test is performed to = whether the expired (expired) timer has Expiration and expiration of the Tpc ((1) Time period expired _) Duration of the timer Tue;?/ Loss of all TPC settings from the associated AP of this client Right of the TPC expiration (expiration If the timer is full or if the TPC period is in the interim period (in the case of the Tpc expiration (expiration) timer Tue's performance 155295.doc -36- 201220899 2), all the users from this user have not been lost. The TPC setting of the associated AP is processed to proceed to 580. If the TPC expires (expired) timer has expired and right During the TPC expiration (expiration) time period (in the duration of the TPC expiration (expiration) time delay Tue), all TPC settings from the associated AP of this client have been lost, then at 506, this The client sets the transmission power for the uplink key transmission (to its associated Ap) to 255. Then, the process proceeds to 58 (FIG. 5c is a time sharing according to an exemplary embodiment of the present invention. A flow chart of one of the client transmit power control procedures operating in mode 1 and mode 2. At 511, assume that the client is operating with a die and the client sets mode 1 to operate timer T3. At 516, A test is performed to determine if timer T3 has expired or if the client has received a mode i to mode 2 switch message (from its associated Ap). If the timer has expired or the port has been received 杈Equation 1 to 杈 2 switch messages (from their associated APs), then at 521 the user switches to TPC mode 2 operation and sets TPC mode 2 operation timer T4, and will - mode [to mode 2 switch message Sent to its neighboring APs and their associated clients. At 526 A test to determine whether the timer T4 has expired or the user is r receives the __mode 2 to mode! switch message. If the timer 尚未4 has not expired and the client has not received the _ mode 2 to mode switch The message is then tested at 531 to determine if the client has received a Mode a to Mode 2 switch message. If the UE has not received a Mode 1 through Mode 2 switch message, then processing continues to 526. If the AP has received a mode switch to mode 2 switch message, then at 536 'this client resets the TPC mode 2 operation timer τ4. Processing continues 155295.doc •37- 201220899 proceed to 526. If the timer T4 has :, , A + m > ^ is full or the client has received a mode 2 to mode 丨 switching message ' at 551, the client switches to the Tpc mode 丨 operation and sets the TPC Mode 丨 operates timer T4 and propagates a mode 2 to mode 1 switching message (broadcast, multicast) to its neighbor Αρ and its associated client. Processing continues to 516. If the timer 3 has not expired and the ΑΡ is still received - the phantom to mode 2 switch message (from its associated ΑΡ) ' then 'execute-test at 541 to determine whether the client has received a mode 2 to mode 丨 switch messages. If the UE has not received a Mode 2 to Mode 1 switch message, then processing proceeds to 516. If the user has received a Mode 2 to Mode 1 switch message, then at 546, the user resets the TPC Mode i Operation Timer Τ3. Processing then continues to 516. In another exemplary embodiment t, in mode 2, for calculating the frame (package) loss rate, the user end moxibustion maintains the most recent transmission to its associated eight? One of the transmission states of the ^^ shoulder frame. If the uplink frame loss rate of the user moxibustion is FLRck=NukeINukt>HFTc (33), the UE adjusts its uplink transmission power, where #_ is transmitted from the user moxibustion to the last 7V of the AP. The number of frames lost or retransmitted in the frame. If the current uplink transmission power of the client A: is "to", the new transmission power for the uplink transmission of the client A to the AP is... the user and the user are allowed (supported) And the smaller of the maximum uplink power max, ie

Putk = min{Putk + Pud) max Puk} (34) 155295.doc -38 - 201220899=Change the transmission power at the user end to account for the large quality of the key, ', 'degradation', so use 彳The terminal continues to periodically monitor FLRcj to adjust its transmission power as described above until the frame (packet) loss rate is lower than the low limit LFTc, that is, FLRCk < LFTc. If the flr^ is less than LFTc', the UE reduces its uplink transmission power to a value of ~ and the new transmission power used by the user for uplink transmission is p(1) mountain and the minimum transmission power supported by the UE-4 The larger value, that is, the new transmission power system ^utk~max{Putk-Pud> min Puk) (35) and the "Xuan user end (station, node, peer) continue to monitor FLRcr as avoiding two powers One of the prevention mechanisms for repeating switching between levels (FLRck <HFTc &FLRck> LFTc), when FLRk < LFTc can assign a value of transition to a transition from a higher power level to a lower power level ( less than 1). HFTc, LFTc, ‘and less configurable design parameters. 6 is a flow diagram of a client transmit power control (Tpc) procedure (operation mode 2) when the UE maintains one of the uplink transmission states in accordance with an exemplary embodiment of the present invention. At 605, the UE sets two frame (packet) loss rate thresholds (HFTc and LFTc) and sets the frame (packet) transmission loss rate FLRck and sets the TPC transmission measurement window. At 610, a test is performed to determine if a tpc setting has been received from the associated Ap of the client. If a TPC setting has been received, then at 615, the UE determines the uplink transmission power based on the command from the associated AP of the UE (household/and sets the uplink transmission power to the corpse)

Ppi/ί. Processing then proceeds to 610. If a tpc 155295.doc -39-201220899 setting has not been received, then at 620, a test is performed to determine if the client wants to transmit to its associated frame.矣 , , ^ There is no frame for this client to transmit to its associated AP, then the process continues to s female subscription * to 61 〇. If the UE has a message to be transmitted to its associated AP at 625, the user updates the transmission status, adjusts, and if .. λ, + the transmission of the user moxibustion fails, the nitrogen is adjusted. At 630, a test is performed with g Μ ^ ΛΓ ^ 疋 no greater than or equal to . If the right is less than, then the processing continues ^ Μ . Ding to 610. If it is greater than or equal to, then at 635, this uses .^ρτρ _ΑΓ to determine the frame (packet) transmission loss rate FLRck=UA^,. At 64 ,, execute the test—to determine if the frame (block I) transmission loss rate is greater than or equal to the secret/ΊΊρ guarding the transmission loss threshold (HFT). If the frame (packet) transmission is less than the frame transmission loss rate L limit (HFT), then at 645, the stick, the target ^ ^ Wds stub - test to determine the frame loss rate Whether it is less than or equal to the low frame transmission loss rate threshold (call. If the frame (packet) transmission loss rate is greater than the low frame transmission loss rate threshold (LFT), then at (4), the user resets Upt' and D〇Wn-11 please both. The processing proceeds to (10). If the frame (packet) transmission loss rate is less than 戎S, * ', the transmission loss rate threshold is lower than the low frame! At 655 'This client estimates that the uplink transmission power used for transmission to its associated AP is %" = bribe 4 _ M. The AP also resets both 4 and 4. At 66 ,, this client will The transmission power used for uplink transmission is set to the household noisy ~ household... " Then the processing proceeds to (4). If the frame (packet) transmission loss rate is greater than or equal to the high frame transmission loss (four) limit (June) At (6), the UE estimates the uplink transmission power used for transmission to its associated core to be 155. 295.doc 201220899 corpse + wax. The Ap also resets both ^ and #山. Then 'processing continues to 66. In an alternative embodiment, the AP is directed to its associated user-end chain The path transmission periodically determines its frame (packet) loss rate (FLR). If the FLR system during the time interval is greater than a threshold HFT, that is, FLR > HFT 'the AP adjusts it to the above as described above. For each of the associated clients, the Ap also increases the uplink transmission power of each of its associated clients and will place a private order on the new uplink transmission rate ( When the t-label, control, and management messages are sent to the right-end user side of the user terminal, the uplink transmission power is ,, and the new transmission power system for the uplink-free transmission of the user to the AP is ' +~ and the maximum allowable uplink power of the user (allowed, supported) _ the smaller value in the heart', that is, the new one is one. I similarly, when its FLR is lower than the low threshold When LFT (ie, flr<lft), the cough is also determined as the (4) (4) of each of the households Road transmission power: and the instructions for the new uplink transmission power (control, beacon, management messages are sent to the user. Use @. 尸) User creep is the new uplink transmission power system -...- Ρ “and the larger of the minimum transmission power (10) supported by the client” (4), the new uplink transmission power is %= min Puk }. tk ud, in the embodiment, in the embodiment, To the associated user: the transmission of the mother-in-the-box to perform the packet (packet) loss rate individually, that is, the AP dimension (4) in the case of each link frame (packet) loss, the ΛΡ maintains the most recent transmission To complex °. With the 用户8 associated client 々 (/b=1, 155295.doc 201220899 2, ...), one of the transmission status of the frame. If it is for the user side, the loss rate of the frame as described above is adjusted to the transmission power of the user's moxibustion, which is determined by the eight? The number of frames lost or retransmitted in the frame after transmission to the end of the user's moxibustion. The same Ap also increases the uplink transmission power of the user moxibustion and sends a message about the new uplink transmission power to the user moxibustion to instruct the UE to use the new transmission power for uplink transmission. If the UE is exempt from the current uplink transmission power as the user, the new transmission power used for the uplink transmission from the UE to the AP is the permission of the user, the user, and the user. Support) The maximum power state is the lower value of the household, that is, the new = (10) 〇 similarly, when the FLR for the user terminal is lower than the low threshold LFT (ie, FLRk < LFT), the Ap The uplink transmission power of the female terminal is also determined and an instruction (beacon, management 'control') message about the new uplink transmission power is sent to the user moxibustion. The new uplink transmission power of the user terminal is the larger of the minimum transmission power supported by the user and the client, that is, the new uplink transmission power is Push=max{Put/ Rpud,min. Figure 7 is a block diagram of an exemplary embodiment of the present invention. Since the _wireless device (station, node, inter-channel, Ap, base station) can be a transmitter, a receiver, or a transceiver, a single block diagram is used to show that there is a radio transmitter/receiver 735. A wireless communication module MS. 2 That is, no, the line transmitter/receiver 735 can be a transmitter, a receiver or a transceiver. The present invention includes a host computing system 705 and a communication module (wireless) 725. The host processing system 7〇5 can be a general purpose computer or a dedicated leaf 155295.doc • 42· 201220899 computing system. The host computing system 705 can include a central processing unit (CPU) 710, a memory 715, and an input/output (1/〇) interface 72A. The wireless communication module can include a media access control (ΜΑ〇 and baseband processor 730, a radio transmitter/receiver 735, and one or more antennas. An antenna transmits and receives radio signals. Radio transmitter/receiver 735 performs radio signal processing, MAC and baseband processor 730 performs MAC control and data framing, modulation/demodulation, encoding/decoding for transmission/reception. At least one embodiment of the present invention may be implemented as a host computing system. 5 or one of the wireless communication modules 725 is used to process the transmission and reception of data and control signals. That is, the block diagram of FIG. 7 can be implemented as a hardware, a software, a firmware, a programmable gate array (FPGA). An ASIC, a RISC, or any combination thereof. Further, the above various flowcharts and the example processes illustrated in the original text are operatively implemented in The host processing system 7〇5 or the wireless communication module 725 or the host processing system 7〇5 is combined with one of the communication modules 725. Therefore, the block diagram enables various methods/processes to be completely hardware and software. , a body, a programmable idle array (FPGA), a dedicated integrated circuit (ASIC), a reduced instruction set computer (RISC), or any combination thereof. In particular, the device shown is acting as When a user terminal (station, terminal device) is operated, the user terminal can operate on the CPU of the host computing system or the MAC of the wireless communication module 725 and the CPU and the wireless communication module 2MAC of the baseband processor or the host computing system. The baseband processor combines h to determine the transmission power of the client. The MAC and baseband processor of the host computing system cpu and/or the wireless communication module are included for 155295.doc •43-201220899 One mode operation is straight one, +7l first juice timer expires and one of the first mode switching messages is received to go to A, + war chess, the member of the player, and used in a second mode a member up to one of a second timer, ', expiration, and receipt-second mode switching message, wherein in _ ^ ^, 肀 in 5 hai - mode, in response to an association The value received by the access point is at the six ai rate {quasi command and if not yet Receiving, by the associated access point, an instruction, a maximum transmission power, determining a transmission power 'and stepping in the second mode, the transmission power is received from the associated access point The transmission power level command and one of the transmission powers determined to be the highest in response to the loss rate. The user can operate in the first mode or the second mode or in the two modes of operation. Inter-switching. The host computing system's coffee and/or wireless communication modeled mac and baseband processor includes means for operating in the first mode of operation and means for operating in the second mode. The switching component, the switching between the first mode and the second mode is optional, and the MAC and the basic frequency processing state of the CPU and/or the wireless communication module of the host juice computing system are included. The component for setting the first timer is used to determine whether the -hour e-timer has expired and has been received (actually receiving a radio transmitter/receiver using the wireless communication module (735)) a mode switch message - the component of the ' a means for switching to the second mode in response to the first determining means and means for setting the second timer and means for multicasting the first mode switching message (actually used for multicasting components) The radio transmitter/receiver of the wireless communication module (735) is used to determine whether the 5th first St timer has expired and has been received (the actual receiving radio using the wireless communication module (735) Transmitter/receiver) The 155295.doc • 44-201220899 = one of the components of the message exchange, used to determine whether a radio transmitter that has received the wireless communication module (73 5) has been received. /receiver). a means for switching the message to the first determining means and responsive to the third determining means for switching to the first mode member in response to the second determining means For setting the first timer, the component and the component for the evening broadcast second mode switching message (actual use; the radio transmitter/receiver of the wireless communication module (7) s) is used for responding Determining, by the first determining means, whether the receiving (using the radio transmitter/receiving) of the first communication switch using the wireless communication module (7) 5 is received and responding to the fourth determination The member of the first timer is set by the member. In addition, when operating in the second mode, the CPU of the host computing system 7〇5 and/or the mac and the baseband processor of the wireless communication module 735 include: using the = fixed-th-frame loss threshold and - The second frame loss threshold is used to determine whether the 疋 has been received from the associated access point (the radio transmitter/receiver that actually uses the WLAN (4) group (735)). And a component for responding to the frame transmission loss rate of the t-threshold transmission in response to the fifth determining component, for comparing:: the transmission loss rate of the frame and the first frame loss Threshold

The means for estimating the transmission power of the component for responding to the first comparison component for comparing the frame transmission loss rate of the uplink M 1 仃 link transmission with the frame loss threshold of the brother And a component for estimating the component of the transmission power in response to the second comparison component, and the component for responding to the estimated transmission power X "power" is used to respond to the component a sixth determining component and I55295.doc -45·201220899 responsive to the received transmitting component and the component for responding to the transmitted power and responsive to the estimated power 钤 power The component of the transmission power. "The ancient finger is also in addition, when operating in this first mode, CTM and / or wireless communication module. And the baseband processor: ^ in the setting - the third timer component, : ... received by the access point (the real connection ... ~ 疋 no from the associated power transmission 51 / T ^ wireless communication module ( 735) Wireless = 2:: The component of the transmission power command is used to respond to: the first core component and (4) to (4) the receiving rate level refers to the component that determines the transmission power, and the field recognizes the thousands of droughts and droughts. The transmission power component is configured to be used by the sixth determining component to determine whether the third timer = whether the third timer is pending or not. The set member and the member for responding to the first transmission power. Further sighs 6 hai = in the alternative embodiment, 'when the second modulo or the wireless communication module _ and the baseband at the core 3 • Use (4) _ _ frame loss threshold and Γ: limit components, used to set - frame loss rate axis:: for initialization - the first counter and - the second counter of the components, with Determining whether it has been received from the associated access point (the actual receiving wireless using the wireless communication module (735) a transmitter/receiver) means for determining, in response to the fifth determining means, whether there is a means for transmitting to the associated access point, for the sixth Determining a component and adjusting a component of the first counter for adjusting a component of the second counter if the data transmission fails to the associated access point to 155295.doc -46-201220899, for comparing the first counter with The frame loss rate amount window is a component for determining the frame transmission loss rate in response to the result of the first comparison component, for comparing the frame transmission loss rate with the first message: loss a component of the threshold value, in response to the result of the second comparison component, estimating a component of the transmission power to the associated pool point for clearing (4) a component of the first counter and the second counter for responding Comparing the frame transmission loss rate and the second frame loss threshold to the second component to estimate the transmission power to the associated access point in response to the result of the third comparison component Component Means for clearing the first counter and the second counter means for setting the transmission power in response to the estimated transmission power for responding to the fifth determining means and responding to the received transmission power levels And means for determining the transmission power and means for setting the transmission power in response to the sixth determination means in response to the estimated transmission power. Further, the user terminal transmits/receives via the wireless communication module 735 Receiver from its associated access point to receive the transmit power measurement report and after receiving the request - the MAC and baseband processor in the host computing system and/or the wireless communication module 735 Processing the request 4APU and/or the MAC and baseband processor includes means for receiving the transmission power measurement request, and means for measuring a received signal strength for estimating a downlink limit The component and the transmission power measurement report for transmitting the measured signal strength and the measured link strength of the measured link strength in response to the transmission force rate in March Associated member user to the access point of the associated end of 155295.doc • 47- 201220899 (the actually transmitted (transmission) using a wireless communication module (735) of a radio transmitter / receiver). Specifically, when the device shown in FIG. 7 operates as an access point, the access point (AP) can operate on the CPU of the host computing system 705 or the MAC and baseband processor of the wireless communication module 725. Or combining the CPU of the host computing system with one of the MAC and the baseband processor of the wireless communication module, and determining the link transmission power of the 4 AP and the uplink mode of the user terminal (station, terminal device) Transmission power. The MAC and baseband processor of the (4) and/or the wireless communication module of the host computing system includes: for operating in a first mode until the expiration of the first δ·Μ expiration and receiving (the actual receiving uses the wireless communication mode) a group (735) radio transmitter/receiver) a component of the first mode switching message A, and for operating in a second mode until a second timer expires and a second mode is received Switching on one of the messages to the component 'and in which the downlink transmission power is one of the maximum transmission power and one of the downlink transmission powers in response to the received signal strength And further determining, in the second mode, the downlink transmission power in one of the interpolation transmission loss rate and the received signal strength, and further performing in the second mode A summary downlink transmission power is determined for all associated UEs and for each phase "user side decision - per link downlink pass power". The CPU of the CPU and/or the wireless communication module of the host system includes means for switching between the components for operating in the second mode of operation in the first mode of operation, And switching between the first mode of operation and the second mode of operation is optional 155295.doc -48 - 201220899, and further wherein the switching component comprises: means for setting the first timer, for Determining whether the first timer has expired and has received (the actual receiving radio transmitter/receiver using the wireless communication module (735)) a component of the first mode switching message, for Switching to the second mode in response to the first decision of the first time and setting the second timer and multicasting (the actual multicast uses the radio transmitter/receiver of the wireless communication module (735)) the first mode The component of the switching message is used to determine whether the second timer has expired and has been received (the actual receiving radio transmitter/receiver using the wireless communication module (7 3 5)) a second mode switching message In the middle And means for determining whether the first mode switching message is received (the actual receiving radio transmitter/receiver using the wireless communication module (735)), configured to respond to the third determining component a component of the second timer for switching to the first mode in response to the second determining component and setting the first timer and multicasting (the actual multicast uses the wireless communication module (735) for radio transmission a component of the second mode switching message for determining whether it has been received in response to the first determining means (the receiving of the radio transmitter/receiver using the wireless communication module (735)) And a component of the second mode switching message and a component for setting the first timer in response to the fourth determining component. In addition, when the AP operates in the first mode of operation and the second mode of operation, the host computing system 7〇5(:1>1; and/or the wireless communication module has a MAC and a baseband processor included : means for receiving (the actual receiving radio transmitter/receiver using the wireless communication module (735)) - a component for transmitting a power measurement report for responding to the received transmission power measurement report 155295. Doc • 49- 201220899 A component of uplink path loss for one of the associated clients, (iv):: τ counts the uplink path loss and the component of the received-downlink limit in the transmission power measurement. One of the transmissions of the associated client is used to estimate the transmission power of the component road for the transmission of the relevant data. (4) The transmission of the user terminal - the target uplink key The CPU and/or the wireless communication module 7 in the second operation mode are operated as the same as the base frequency processor 3; and the first frame loss threshold and the second The frame is the component of the threshold; used for stabbing ~ ° 贝 率 rate & . heart ~ the link transmission of the transmission loss ', used to compare the frame transmission loss rate and the first frame loss = the component; in response to the first comparison a component of the component and a component of the downlink transmission power of the associated client; a component for setting a flag, for comparing the frame transmission loss rate and the second frame loss threshold Means for responding to the second comparison component: estimating the downlink transmission power to the associated client; and means for setting the flag. When operating in the second mode of operation MM and base of the host computing system 705 and/or the wireless communication module: the processor also includes: a component for setting a third timer; using: Ding-Hai-Shi Shiyi has expired And setting a condition of the flag for responding to the sixth determining component and responding to the estimated downlink transmission power to the associated client and responding to the estimated target downlink Setting the associated client by transmitting power The component of the downlink transmission power; for transmitting the estimated uplink transmission power to the 155295.doc 201220899 (the actual transmission uses the radio transmitter/receiver of the wireless communication module (735)) to the And means for clearing the flag. Further, when the port is operating in the first mode of operation, the CPU of the host computing system 705 and/or the MAc and base of the wireless communication module 735 The frequency processor includes: a component for setting a third timer and a fourth timer; determining whether the fourth timer has expired and is associated with an R loss line during one of the fourth timers a component of all transmission power measurement reports of the client; for responding to the (4)-determination component and setting the downlink transmission power to the associated UE and setting the _th=component; Determining, in response to the first unit, the third timing = whether the component has expired; and setting the downlink transmission power to the associated UE in response to the second determining component and setting The second timing benefit . When operating in the first operation mode, the host computer: the CPU of the CPU and/or the wireless communication module 735 and the base frequency device 2 include: a component for setting a fifth timer; Whether or not the leaf time device has expired and is set as a component of the flag. The third determining component responds to the estimated transmission power to the phase two of the phase and responds Setting the associated user end of the estimated transmission power of the station, the component of the transmission power of the link is used for transmitting the estimated uplink transmission; The component of the actual = wireless tuner (735) radio transmitter/receiver) to the associated subscriber; and means for clearing the flag. In addition, in an alternative embodiment, when operating the I55295.doc 51 · 201220899 in the second mode of operation, the cpu of the host computing system 705 and/or the c and the baseband processing n of the wireless communication module (1) include: Setting _th-frame loss threshold ^ a second frame loss threshold component, used to set the frame loss rate in the component of the measuring surface for initializing a first counter and a second counter component Determining whether there is a component for transmitting data to the associated client and transmitting the data (the actual transmission uses a radio transmission benefit/receiver of the wireless communication module (735)) for responding to the first Determining a component and a component of a counter-counter for adjusting a component of the second counter for comparing the first counter with the frame loss rate amount if the data transmission to the associated client fails a means for determining a transmission loss rate of the frame in response to the result of the first comparison member, for comparing the frame transmission loss rate with the first frame loss threshold component, In response to the And a component of the downlink transmission power estimated by the second comparison component, configured to set a flag component for comparing the frame transmission loss rate with the second frame loss a component of the limit value for estimating the downlink transmission power of the user terminal in response to the result of the third comparison component and an alternative embodiment for setting the first mode The MAC and baseband processor of the CPU and/or the wireless communication module of the host computing system 7〇5 during operation also includes: determining whether the third timer has expired and whether one of the flags is set. a component for responding to the second determining component and setting the associated user in response to the estimated downlink transmission power to the associated UE and in response to the estimated target downlink transmission power The component of the downlink transmission power of the terminal is used for 155295.doc • 52· 201220899 to transmit the estimated uplink transmission power (the actual transmission uses the radio transmission transceiver of the wireless communication k module (735)) to Associated member of the UE and means for clearing the flag of the member. It will be understood that the invention may be embodied in various forms of hardware, software, firmware, special purpose processors, or combinations thereof. Preferably, the invention is embodied as a combination of a hard body and a soft body. In addition, the software is preferably implemented as an application tangibly embodied on a program storage device. The application can be uploaded to and executed by a machine including any suitable architecture. Preferably, the machine is implemented on a computer platform having hardware such as one or more central processing units (CPUs), a random access memory (RAM), and an input/output (1/〇) interface.咭雷赃 t Back to the Dingkou, the electric sub-unit also contains an operating system and micro-command code. The various processes and functions set forth herein may be part of a microinstruction code or application (or combination thereof) executed by the operating system. In addition, various other peripheral devices (e.g., an additional data storage device and a printing device) can be connected to the computer platform. It should be understood that, as some of the constituent system components and method steps illustrated by the accompanying drawings are preferably implemented in software, the actual connections between system components (or method steps) may depend on the manner in which the present invention is programmed. And different. Those skilled in the art will be able to devise such and similar embodiments or configurations of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Figure la shows an exemplary deployment scenario; Figure lb shows a situation in which content is delivered via a wireless home network; a department 155295.doc -53· 201220899 Figure lc summarizes two transmitters (Τχ) _ Receiver (Rx) link interaction; Figure 2a is a flow chart of transmission power control (TPC) measurement operation from the perspective of the Ap; Figure 21) is the amount of TPC from the perspective of the user FIG. 3 a and FIG. 3 b show the AP (summary) transmission power control (Tpc) program according to an exemplary embodiment of the present invention (operation mode-like flowchart; FIG. 3b and FIG. 3c The AP transmission power control (Tpc) procedure (operation mode) used for the communication of the link 00 quality (received signal strength and link margin) reported by the user according to an exemplary embodiment of the present invention Figure 3d is a flow chart of one of the Ap transmission power control procedures operating in mode 1 and mode 2 in a time sharing manner in accordance with an exemplary embodiment of the present invention; Figure 4a and Figure 4b & According to an exemplary embodiment of the present invention, when Flowchart of the 链路ρ transmission power control (Tpc) program (operation mode 2) of the parent link 5 1 1 frame (packet) loss rate and link quality (received signal strength and link port quality); 5a is a flow chart according to the present invention - an exemplary implementation (4) a household transmission power control (TPC) program (operation mode 2); FIG. 5b is a user terminal transmission operating in mode 1 according to an exemplary embodiment of the present invention. Flowchart of one of the power control programs; FIG. 5c is a flow of the user-side transmission power control program operating in a time sharing method, mode 1 and mode 2 according to an exemplary embodiment of the present invention. 155295.doc -54· 201220899

A flow chart of a client transmission power control program (action mode 2) when the user terminal maintains the window of the transmission state according to an exemplary embodiment of the present invention; and FIG. 7 is an example of the present invention. A block diagram of a sexual implementation. [Main component symbol description] 705 Host computing system 71〇 Central processing unit ?15 Memory 720 Input/output interface 725 Wireless communication module 73〇 Media access control (MAC) and baseband processor 735 Radio transmitter/receiver

Rx Receive Τχ Transmission I55295.doc -55·

Claims (1)

201220899 VII. Patent application scope: r - (4) In order to determine the transmission power, the method includes: the m-th operation until the -the first timer expires and one of the first: mode switching messages is received; : the second mode operation until a second timer expires and receives a ^ mode switching message, wherein the first mode - % of the transmission power level command received from the associated access point : has not received an instruction from the associated access point - maximum transmission power: - but - transmission power 'and further wherein the second two H rate system is received from the associated access point Etc.: The force rate iM date corresponds to the - frame transmission loss * (four) decision - one of the transmission power is the largest. The method of claim 1 wherein the switching between the first mode of operation and the first mode is selected, and the method further comprises: setting the first timer; whether the first timer has been Expiring and receiving one of the first mode switching messages; switching to the second mode in response to the first determination and setting the second timer and multicasting the first mode switching message; Whether the second timer has expired and whether one of the second mode switching messages has been received; determining whether the first mode switching message has been received; setting the second timer in response to the third determining Switching to the first mode in response to the second determination and setting the first I55295.doc 201220899 timer and multicasting the second mode switching message; determining whether a message has been received in response to the first determination; And the mode switch sets the first timer in response to the fourth determination. 3. The method of claim 1, wherein the second mode of operation comprises: setting a first frame loss threshold and a first __ address value and a frame loss threshold; determining whether Receiving the quasi-instruction from the associated access point; the noon loss is the fifth decision and the frame transmission frame of the uplink transmission compares the frame transmission loss rate of the uplink transmission with the a first loss threshold; 〆 estimating the transmission power in response to the first comparison; comparing the signal transmission loss rate of the uplink transmission with the first loss threshold; and X responding to the second comparison Estimating the transmission power; setting the transmission power in response to the estimated transmission power; determining the transmission power in response to the sixth determination and responding to the received transmission power levels; and responding to the Seven determines and responds to the estimated transmission of the transmission power. Cognac - 疋 4. As requested by the method of 'the first - mode of operation - step includes: setting a third timer; I55295.doc • 2 - 201220899 Let π no have been received from 4 associated access points Reaching the power of the transmission wheel in response to the fifth judgment macro, t. ^ 疋 判定 and determining the transmission power in response to the received transmission power level; early response to the sixth determination Setting the transmission power; determining whether the third timer has expired and whether all of the estimated transmission power settings have been lost during one of the third timing tests; and setting the transmission power in response to the seventh determination. 5. The method of claim 1, wherein the second mode of operation further comprises: setting a “frame-to-frame loss threshold” and a second frame loss threshold, and setting a frame loss rate measurement window; Initializing - the first counter and the second counter; determining whether the associated access point has been connected (4) the transmission power bits are determined to be the data of the joint access point in response to the fifth determination; The phase Adjusting the first counter in response to the sixth determination; adjusting the second counter if the data transmission to the associated access point fails; comparing the first counter with the frame loss rate measurement window; Determining the frame transmission loss rate in response to the result of the first comparison; comparing the frame transmission loss rate with the first frame loss threshold; and estimating the associated coexistence in response to the result of the second comparison Taking the 155295.doc 201220899 the transmission power; clearing the first counter and the second counter; and comparing the frame transmission loss rate with the first frame loss threshold in response to the second comparison; Estimating the transmission power according to the result of the third comparison; 卞 occupying the first counter and the second counter, and setting the transmission power in response to the estimated transmission power: : (4) And determining the transmission power in response to the received transmissions; and + responding to the sixth determination and returning the transmission power. The port should be set according to the estimated transmission power. 6. A device for determining transmission power, comprising: for operating in a first mode until -黛j to a _槿-.+ 罝 to the first timing a means for expiring and receiving the ___ of the mode switching message; for operating in a second mode - m switching the full and receiving the first mode, wherein the level command And if the transmission power received from the associated access point is large in the transmission power == the joint access point receives the command - the most in the second mode is the transmission power of 2, and further among the transmission power bits The associated access point receives one of the decisions and the largest one that responds to the frame transmission loss rate. In the device of claim 6, Α &quot; is used in the first operation mode to operate the I55295.doc 201220899 component and the second selection, and the device further includes: operation The component switching is used to set the component of the first timer; and is used to determine whether the first timing/first mode switching message is full and whether it is connected (4) for responding to the first determining twin. ^ means to switch to the second mode of the gift and set the second timer to construct the message; #件和多播 the first mode switch is used to determine the second timer county a ^ m a component that has expired and has received one of the first mode switching messages; a means for determining whether a "Hail-Mode switching message has been received; for responding to the third determination" Setting the second timer to switch to the first mode for responding to the second determining component: sighing ▲ the first timer component and multicasting the second mode message Component; for responding to the first brake a member for determining whether the second mode switching message has been received by the N疋 member; and means for setting the first timer in response to the fourth brake macro pulling member. The second mode of operation further includes: means for setting a first % 415 4 port δί1 frame missing threshold and a second frame loss threshold; for determining whether the correlation has been The joint access point receives the component of the transmission function 155295.doc 201220899 rate level instruction; the component for responding to the loss rate of the fifth component (four) frame transmission; the first use of the link transmission wheel Comparing the frame loss threshold of the uplink transmission; the 彳 失 rate is used to respond to the first conjugate; the component is estimated to compare the transmission power for comparing the uplink transmission The frame frame loss threshold component; the frame rate is used to respond to the second component; the estimated power of the transmission is used to respond to the estimated wheel function; Transmission power structure Means for responding to the sixth determining component and responding to the power level command to transmit the transmission power and receiving the component for transmitting the transmission power in response to the seventh determination rate.轮轮功9. The device of item 6, wherein the first mode of operation comprises: a component for setting a third timer; / a component for determining whether the command has been derived from the correlation rate (4) The access point receives the transmission power for determining the transmission power in response to the fifth determined alumina power level command: the receiving member is used in the received transmission wheel to respond to the sixth thorn It sets the transmission power to 155295.doc 201220899; it is used to determine whether the third timer has expired and whether all estimated transmission power settings have been lost during one of the third timers. a member; and means for setting the transmission power in response to the seventh determining member. </ RTI> The device of claim 6, wherein the second mode of operation further comprises a second frame loss component for setting a first frame loss threshold and a _ limit; for setting a frame loss rate a component of the measurement window; a component of the juicer; the point receiving the transmission function for initializing a first counter and - a component for determining whether the associated access rate level command has been used; Determining, in the fifth determining component, a component for determining whether to transmit data to the associated access point; and adjusting the first counter in response to the sixth determining component Constructing a component for adjusting the second counter if the data transmission to the associated access point fails; for comparing the first count disk μ· μ &gt; 1 The window is configured to determine a frame transmission loss rate in response to the first comparison profile > a result of comparing the frame transmission loss rate; and comparing the frame transmission loss rate with the first frame loss Limit 155295.doc 201220899 a means for estimating the transmission power to the 兮4 access point in response to the result of the second comparison; the edge of the thimble is used to clear the first counter and the sniper Means responsive to the second comparison component, and the second frame loss threshold; ♦ the wheel loss rate component responsive to the transmission power of the 纴 access point of the third comparison component ;, ···° even the component for clearing the first counter and the second counter is configured to respond to the fifth determination in response to the estimated transmission power setting the transmission power And means for determining the transmission power in response to the received transmission power level command; and means for setting the transmission power in response to the sixth determination means and in response to the estimated transmission power. π. A method, the method comprising: receiving a transmission power measurement request; measuring a received signal strength; estimating a downlink margin; and transmitting the included measurement in response to the transmission power measurement request A received power measurement report of the received signal strength and the estimated downlink margin. 12. An apparatus comprising: means for receiving a transmission power measurement request; 155295.doc 201220899 means for measuring a received signal strength; means for estimating a downlink margin; and And means for transmitting, in response to the transmission power measurement request, a component including the received signal strength and the estimated call rate measurement report. One of the limits of the Ding Road limit. 155295.doc