TWI418166B - Method for transmit and receive power control in mesh systems - Google Patents

Description

Transmission and reception power control method in mesh system

The present invention relates to a wireless area mesh system. In particular, the present invention relates to a signaling mechanism that can be implemented at a mesh point (MP) to enable transmit (Tx) and receive (Rx) power control.

Figure 1 shows a typical wireless system infrastructure consisting of a set of access points (APs), also known as base stations (BSs), each connected to the wiring network via a backhaul link. . The wireless link exists between an access point and a subscriber station (STAs). In several scenarios, the cost of directly connecting a given access point to a wiring network makes the alternative more attractive by indirectly connecting the access point to the wiring network by wirelessly connecting its neighboring access points. This is called a mesh architecture. Figure 2 shows a simple mesh architecture with multiple mesh points that support the control, management, and operation of mesh services. The mesh point can be a dedicated infrastructure (such as a mesh access point (MAP)) or a user device (such as a station) that is fully involved in the shaping and operation of the mesh network. Because the wireless network does not have to provide backhaul links and interconnect modules for each access point to be laid out, the advantages of using a mesh infrastructure include ease of use and layout speed. A very important operational consideration is that the transmit power settings of the mesh nodes are regulated to meet regulatory requirements. Today's wireless communication operations are regulated by the FCC (and its rivals in other countries). In particular, certain maximum transmit power settings are specified to minimize unauthorised wireless device interference, such as for wireless local area networks. Moreover, these regulatory requirements typically change with each regulatory area (eg, the United States, Europe, Japan). The typical regulatory requirements for traditional wireless LANs operating in the basic construction mode (Basic Service Group (BSS) or Standalone Mode (IBSS)) are summarized as follows (ie, mesh operations are not proposed by this existing standard) ).

The transmission power control (TPC) under IEEE 802.11h in the 5 GHz band wireless local area network is mainly driven by the different regulatory transmission power grants in the European 5 GHz band assignment, but is also used by the FCC in the US different regulated power requirements for 5 GHz. Band requirements, including:

. Low U-NII (5.25-5.35GHz, 4 channels) US 40mW, Europe 200mW

. Medium U-NII (5.35-5.45GHz, channel 4) US and Europe 200mW

. (5.47-5.725GHz, channel 11) only 1000mW in Europe

. U-NII (5.725-5.825GHz, channel 5) only US 800mW

The maximum allowable transmit power of any station in a basic service group or an independent basic service group is a power limit information component (IE) that is extracted from the regulated maximum power value included in the national information component. The national regulated maximum power value (802.11d) is included in the beacon (BEEACON) and probe response (PROBE RESPONSE) frames. Similarly, IEEE 802.11h puts the power limit information component into the beacon and probe response frames.

The transmit power control under IEEE 802.11h adds the power performance information component to the link request (ASSOCIATION REQUESTS) that the slave is transmitted to the access point (or the station in the independent basic service group) (RE-ASSOCIATION REQUESTS) ). This power performance information component is the minimum and maximum possible transmit power setting indicator of the transmitting station to the receiving station.

If the range of other station power performance information components identified in the access point or independent basic service group is not allowed to operate with the current basic service group control settings, the link attempted by the station will be rejected by the station. The access point is the only authority in the basic service group that can change the basic service group allowable power setting. In the independent basic service group, the station that starts the independent basic service group is set to allow the power setter, and the other stations that continue to transmit the beacon frame are required to propagate the initial power setting.

In the basic service group example, the allowable power setting (the offset in the regulatory and power limiting information components of the national information component) can be changed during the life of the basic service group. Range control and interference reduction are explicitly cited in IEEE 802.11h as one of the features. However, setting these changes preferably should not occur "too often".

One of the problems is that even if each beacon can be used to change the power setting, not all stations (such as those in the packet switching (PS) mode) listen to each beacon frame. Therefore, the maximum transmission power change is half. The static sensation requires at least a number of target beacon transmission times (TBTTs) (hundreds of milliseconds) to enable all stations in the basic service group to adopt the new transmission power setting.

Officially, the 802.11h transmit power control system needs to check the allowable power settings when attempting to access the channel at any time. However, all manufacturers have been skeptical from the fact that the latest received beacon frame is automatically updated to its media access control toughness system. It is reasonable to assume that this happens only occasionally, and in extreme cases it only occurs during the link or reconnection.

The transmit power control under 802.11h also introduces a transmit power control request/report (REQUEST/REPORT) action frame pairing. This transmit power control request/report action frame is occupied to require transmit power settings and link tolerances from another station. The reported transmit power in the transmit power control report action frame is used to transmit the transmit power control report. The reported link tolerance is the one observed by the receiver when the transmit power control report action frame is received.

The information components included in the transmit power control report action frame can also be placed in beacons and probe responses that were originally expected to present certain special problems in an independent basic service group mode. However, the link tolerance domain in this example is meaningless and is only set to zero. These new 802.11h transmit power control related information components are found in the Example 1 frame (that is, they can be transmitted and received by unverified and unconnected stations).

For completeness, the 802.11h transmit power control functionality of the 5 GHz band was expanded to 2.4 GHz by the 802.11k Draft Amendment.

In order to facilitate layout and easy adoption of the new layout environment, it is necessary for the mesh device to adopt a device that allows transmission power setting. In addition to these regulatory considerations, adaptive transmit power levels are highly expected to maintain high throughput and guarantee service quality levels in the mesh network.

The transmission and reception power level settings of the participating nodes in the mesh system greatly affect the perceived communication and interference range. The perceived communication range is the distance at which a particular data rate can be maintained point-to-point or point-to-multipoint transmission. The perceived interference range is such that even if the transmission itself cannot be decoded correctly, the transmission can interfere with or degrade the other ongoing transmission distances from other nodes in the mesh system on the channel (or even adjacent channels).

In general, maintaining the lowest possible transmit power setting in a given mesh point for a given mesh link maintains the data rate state is the best way to minimize interference with adjacent channels and adjacent channels in other nodes in the mesh system. On the other hand, this contributes to a high net data transfer rate because the maximum possible transmit power setting directly affects the signal to noise ratio known to the intended receiver. This means that the mesh point faces conflicting needs and preferences expressed in terms of its transmit and receive power level settings. Therefore, the ideal transmit power level setting for a particular mesh point is to maximize individual data rates on a particular link (higher data rates with higher transmit power settings) and maximize overall mesh system performance (with less interference) The replacement relationship between better performance and more space reuse on the same channel.

For example, the CSA detection threshold and the minimum reception sensitivity of the received power level setting affect the link budget and the observed signal to noise ratio in the receiver. Receive power level settings also affect the likelihood of failed channel access or collisions in a carrier-aware multiple access (CSMA) based scheme such as an 802.11 wireless local area network.

However, the level of interference perceived by different nodes of the wireless mesh system can vary widely geographically and temporally. This is due to the dynamic wireless environment in the mesh system and the transmission of instantaneous time-varying characteristics, such as the load per link or path, occupying channel time, and so on.

Therefore, the device that dynamically controls the transmission and reception of power levels of the mesh node during the mesh network name loss can expect to maintain the mesh system output and service quality at a high level and at a guaranteed level. At the same time, because the wireless mesh network must make regulatory requirements, the channel changes.

Although today's traditional wireless local area networks (802.11a, b, g, j, n) do not provide any transmission power settings that motivate the initial start, but for wireless local area network media access control (MAC) and physical layer (PHY) Specifications are corrected (802.11h) to meet regulatory requirements for European 5GHz band operation. IEEE 802.11h transmit power control only allows the wireless LAN system in the 5 GHz band to set the transmit power setting during the initial connection period and to some extent the wireless area network lifetime (infrastructure construction mode or easy mode (AdHoc) ). However, the 802.11h fix does not address specific requirements and mesh system limitations. This example is not expected to be simple.

In particular, there is no device that ensures a selective transmission power change for a particular link within the mesh system. Furthermore, only the maximum allowable transmit power setting can be transmitted. However, as important as the maximum allowable transmit power setting, the minimum power setting to ensure link establishment and minimize channel access collision probability is also important.

Variable transmit power settings improve mesh wireless efficiency, but existing technologies do not provide a means to achieve this. Furthermore, the transmit power control method must be designed such that the mesh network can satisfy the current wireless local area network that operates in the intrinsic infrastructure (as in the basic service group) and in the simple mode (as in the stand-alone basic service group). 802.11h transmits specific control requirements for power control awareness.

A method and apparatus for controlling the transmission and reception power levels of a mesh point operating in a mesh wireless communication network of a plurality of mesh points. The power performance information of the new mesh point is transmitted to at least one existing mesh point in the mesh network. The existing mesh point can accept the new mesh point as a member of the mesh network and transmit the allowed power setting information to the new mesh point. The new mesh point adjusts its power level based on the allowed power setting information.

Although the features and elements of the present invention are described in the preferred embodiments in the specific embodiments, the various features and elements can be used separately (without other features and elements of the preferred embodiments), with or without other features of the present invention. And various combinations of components.

Thereafter, the mesh point includes, but is not limited to, a wireless transmit/receive unit (WTRU), a user equipment, a mobile station, a fixed or mobile subscriber unit, a pager, or any other type of user device operable in a wireless environment. Those referred to hereinafter as access points include, but are not limited to, a base station, a Node B, an address controller, or any other interface device in a wireless environment.

Here, the "mesh neighbor" noun refers to the middle neighbor of a particular mesh point (that is, the wireless range). It also relates to other mesh nodes that the access point can reach when its signaling message is forwarded by the other mesh points via the mesh system. It may also include a network entity in the middle of the wireless mesh system, such as a node present in a wired backhaul network that is connected to the mesh system.

The present invention provides a signaling program and mechanism for providing a mesh system to adjust transmission and reception power levels during system lifetime control and wireless management purposes when the mesh point is added to the mesh network and during the lifetime of the mesh network. Device. The invention proposes that the distribution context (that is, the network point is bitten "point-to-point" signal transmission) and the relationship between the network points are mainly from one of the master-slave contexts. In the latter case, the power master station (PM) is the main mesh point responsible for specifying the power settings in the mesh system, the total control settings for each mesh point and each link, and the individual power settings.

The invention includes methods and apparatus that can be used in the following manner:

a) by sending a mesh point exchange signal such as the maximum and minimum power settings to set the relevant performance information;

b) by means of which the mesh point is sent to know the allowable power setting in the mesh system;

c) the mesh point responds to different or contradictory allowable power setting information messages and configuration parameters;

d) power adjustment in the mesh system to meet regulatory requirements and dynamically adjust power settings; and

e) Select a given mesh node as the power master.

Figures 3A and B show signal transmission diagrams for power performance information exchange between the master-scheduled mesh point 101 and the power master station. The power performance information preferably includes, but is not limited to, any of the items shown in Table 1, including any combination thereof.

In Figure 3A, the mesh point 101 reports its power performance information 301 to the power master in an unsolicited manner, such as a partial propagation/multicast type frame. In FIG. 3B, the mesh point 1 reports its power performance information 303 in response to the request type frame in response to the power performance requirement 302 (eg, the exchanged signal 302, 303 can be between the mesh point 101 and the power master station). Point to Multicast Request/Response Type Frame Type). Although Figures 3A and B show power performance information signal transmission between the mesh point 101 and the power master station, the signal transmission can also be exchanged between the mesh point 101 and other adjacent power master stations. Figures 3C and D show signal transmission diagrams similar to the power performance information interference scenarios exchanged between the mesh point 101 and the mesh point 102 shown in Figures 3A and B.

According to the present invention, the request (request/report type) report and the unsolicited report power performance information 301, 303 issued by the mesh point can be transmitted as a mesh multicast, multicast or propagation management or control message. The shoulder-shaped information component at the top of the box. Alternatively, the power performance report can be transmitted as a separate mesh multicast, multicast or propagation management or control frame.

For example, in the mesh management frame embodiment, the mesh point power performance information 301, 303 may be included as a mesh link frame or a mesh verification frame (for example, the frame is to become a mesh portion and other mesh points). Additional information component in exchange). Alternatively, the power performance signal transmission information 301, 303 may be included as an additional information component in the mesh beacon frame or the mesh probe response frame, which is present or synchronized for the purpose of exploiting the mesh network, such as a timer value. The general mesh parameters can also be used for exchange. Another alternative is to include power performance information 301, 303 as an information component in the link or relink response frame. Another alternative is to include power performance information 301, 303 as part of a special purpose per-link or multi-hop power performance frame.

Figures 4A and B show a signal transmission diagram of the primary mesh point for the allowable power setting, which has regulatory requirements for the mesh point to handle a specific maximum allowable power setting during communication. The allowable power setting information preferably includes, but is not limited to, any of the items shown in Table 2, including any combination thereof.

The master-slave context is illustrated in Figures 4A and B, where the information is obtained from the primary power master from the mesh point 101. In Fig. 4A, the power master station 101 obtains its allowed power setting information 401, such as a partial propagation/multicast type frame, from the power master station in an unsolicited manner. In FIG. 4B, the mesh point 1 obtains its allowable power setting information 403 in response to the request mode of the response type frame in response to the power performance requirement 402 (eg, the exchanged signal 402, 403 may be between the mesh point 101 and the power master station). Point to the multicast request/response type frame type). Although the 4A and B diagrams show the transmission of the allowable power setting signal between the mesh point 101 and the power master station, the signal transmission can also be exchanged between the mesh point 101 and other adjacent power master stations. Figures 4C and D show the power performance information interference scenarios that are exchanged between the mesh point 101 and the mesh point 102 as shown in Figures 4A and B.

According to the present invention, the request (request/report type) and the unsolicited reception allowable power setting information 401, 403 can be transmitted as a mesh multicast, multicast or propagation management or control panel on the top of the shoulder Information component. Alternatively, the allowed power setting information 401, 403 can be transmitted as a separate mesh multicast, multicast or propagation management or control frame.

For example, in the mesh management frame embodiment, the allowable power setting information 401, 403 signal transmission in the mesh system may be included as a mesh beacon frame or a mesh detection response frame (for example, to discover a mesh network or Synchronize signals such as timer values to send frames and exchange). Alternatively, the mesh point allows the power setting information 401, 403 to be a mesh link frame or a mesh authentication frame (for example, the frame is exchanged with other mesh points in order to become a mesh portion). In another alternative, the packet allows the power setting information to be partially directed to a special purpose per-link or multi-hop allowable power setting frame.

The allowed power setting information 401, 403 may be signaled individually or in combination for any of the following: all meshes (eg, all nodes in the mesh system are active); specific mesh links or paths (eg, a set of mesh nodes are valid); The node (such as the wireless channel of all mesh points is valid); the specific mesh node wireless interface (such as each link and each point of the mesh point can be set).

The allowable power setting information 401, 403 can be signaled as an absolute value, a relative value associated with certain predetermined absolute values, or a combination of absolute and relative values (eg, maximum allowable transmit power = regulated maximum - temporary offset).

Turning to Figure 5, the assignment context is now described with reference to the mesh point 501, wherein there is no mesh point and the mesh point 501 can receive two or more meshes from the displayed mesh point 502 and mesh point 503. Different points allow power setting information. Since there is no mesh point in the distribution context, when setting its self-transmitting power setting and transmitting its allowed power setting information to other mesh points, mesh point 502 and mesh point 503, the mesh point 501 must decide that it will use How to allow power setting information. The signal transmitting program shown in Fig. 5 can solve the problem that the mesh point 501 determines the allowable power setting information to be used, and solves the mismatched allowable power setting information received from other mesh points.

For the example shown in FIG. 5, the mesh point 501 is configured with its own allowable power setting information APSI_own, and receives APSI_i indicating the allowed power setting information transmitted from MP_i, indicators i=2 and 3. The APSI_i value may be further represented by a vector APSI_vector, which represents the population of APSI_i values that the mesh point 501 receives from other mesh points.

The Allow Power Set Information component example includes the Maximum Allowed Transfer Power Setting (MATPS). For the sake of simplicity, the following method description includes only the maximum allowable transmit power setting information component. When setting its self-transmitting power setting and transmitting the allowed power setting information to other mesh points, the mesh point 501 must determine from a set of input MATPS_own 504 and MATPS_vector values 505, 506 what maximum allowed transmit power setting will be used. This can be achieved by implementing the decision function F in the mesh point 501.

For example, assume that mesh point 501 receives MATPS_vector, including two vector value settings 505, 506: MATPS_1 = 20dBM from mesh point 502 and MATPS_1 = 10dBM from mesh point 503. It is also assumed that the mesh point 501 self maximum allowable transmission power setting is configured to be MATPS_own = 10 dBm. In a preferred implementation, the function F will determine the minimum maximum allowable transmit power setting from all its inputs (i.e., min(10, 20, 15) = 10dBM), while the mesh point 501 is used to maximize its transmit power. The transmit power setpoint is allowed to be transmitted and it will be sent as the allowable power setting information portion of the mesh point 501 to other mesh points. Thus, the maximum allowable transmit power setting 507 represented by the function F can be expressed as follows:

Similarly, other operational power settings can also be selected using the appropriate function F.

In an alternative embodiment, the mesh point 501 determines the transmission power using the maximum allowable transmit power set value determined by equation (1), but the mesh point 501 sends the self maximum allowable transmit power set value as the allowable power setting information. To other mesh points, mesh point 502 and mesh point 503.

Figure 6 shows a signal transmission diagram of the mesh point 601 into the mesh system 600 in which the transmission power is adjusted to meet regulatory requirements. Although the transmission power setting adjustment is described with reference to the mesh point 601, the same transmission power setting adjustment procedure can be applied to each mesh point in the mesh system 600. Likewise, the transmit power can be controlled for a subset of mesh points. The mesh system 600 includes a mesh point 602 - a mesh point N when the mesh point 601 looks for an entrance. One or more mesh points, the mesh point 602 - the mesh point N may be a mesh point. As shown in the third A-D diagram, when initially added 610, the mesh point 601 transmits its transmit power performance information 611 to the mesh point 602 - mesh point N when it is turned on. As mentioned above, the preferred way of transmitting transmit power performance information is as part of combining or verifying (recombining or revalidating) the frame. The transmit power performance information 611 can be performed periodically or in a request or unsolicited manner. At step 612, the mesh point 601 becomes a partial mesh system. The mesh point 601 is for receiving the allowable power setting information 613 during the excavation process or joining the mesh network, which is transmitted to the network periodically by the mesh neighbor mesh point 602-the mesh point N or in an unsolicited or requested manner. In the system. The allowable power setting information is exchanged as in the above-mentioned 4A-D diagram. As mentioned above, the preferred way of transmitting the signal is to use a mesh frame or a mesh probe response frame. At step 614, the mesh point 601 reads the received allowable power setting information 613 and adjusts its transmit power setting. The mesh point 601 may or may not recognize its transmission power setting adjustment for other mesh points, mesh point 602 - mesh point N.

The mesh point 601 can transmit its self-allowed power setting information 615 to the mesh point 602 - the mesh point N. Similarly, the mesh point 601 can receive a transmission power setting change from the mesh point 602 - mesh point N that is triggered by its transmission power setting change. A number of selections and complementary signal transmission extensions (not shown in Figure 6) support the adjustment of the power settings of the mesh system. For example, mesh point 601 may require measurement of power settings, perceived signal to noise ratio and link tolerance, perceived interference power, and channel busy time from its mesh point neighbor mesh point 602 - mesh point N. In accordance with the present invention, the selection process is used by the mesh point to refer to the selection of the power master. The preferred power master selection and reselection procedure includes one or more of the following:

a) The first mesh point belonging to the mesh system automatically becomes the power master.

b) The mesh point when it is turned on determines whether one of its neighbors is a power master. The power master station can be identified by L2 or L3 propagation, multicast or dedicated signal transmission as part of the setup procedure (eg, verification, mesh beacon reception, function exchange, etc.) by mesh point reception.

c) The power master can be preset (that is, the mesh life is fixed) or limited time (that is, a predetermined amount of time or depending on a specific situation, the power master selection procedure is restarted).

d) In an advantageous implementation, the power master station is identical to the mesh entry and the mesh entry identifier is thus automatically directed to the power master.

e) The mesh point of the most link to the adjacent mesh point becomes the power master.

f) The mesh point determines the power master by random number lottery.

g) The mesh point determines the power master as a jump number function from a mesh entry or a specific predetermined mesh point.

h) any combination of the above.

Figure 7 shows a signal transmission diagram for identifying a mesh power primary station in accordance with the preferred embodiment described above. The power master requires that the information component be included as a signal 711 in the signal 711 that is transmitted via the mesh system by indicating that the mesh point is selected to the adjacent mesh point, the mesh point 702 of the mesh point 702 - the mesh point N / Multicast / unicast signal transmission frame part. This information component includes the originating mesh point address and other parameters, such as a pause value, a selection criterion, a preset identifier for the mesh point, a response address, and the like. The power master response information portion of the propagation/multicast/unicast signal transmission frame in signal 712 is via a mesh system containing selection criteria from the neighboring mesh point, mesh point 702 - mesh point N. Being transmitted. The comparison program 713 is initiated in the mesh point 701 where selection criteria responses 712 ₁ ... 712 _N from different neighboring mesh points are evaluated. The power master selection is determined based on the fact that the mesh point satisfies the requirements of the selected selection criteria pattern (e.g., the highest random number lottery or the like). The mesh point 701 can propagate its mesh system that is last selected into the signal 713 for the power master.

Alternatively, the mesh point 701 can be considered as a mesh inlet and all transmission power control settings are set for the mesh system, and subsequent addition of the mesh point system is required to propagate these transmission power control settings to other mesh system mesh points. .

The signal transmission and information exchanged between the mesh points or between the mesh points and the power main station in the above manner is preferably implemented as a layer L2 (such as a medium access control layer) signal transmission frame or information component. Thus, the entity implementation is a processor entity within each mesh point, such as mesh point 101, mesh point 102, and 3A-D diagrams, the mesh points shown in Figures 4A-D; The mesh point 501, the mesh point 502 and the mesh point 503 are shown; the mesh point 601 shown in Fig. 6, the mesh point 602 - the mesh point N; and the mesh shown in Fig. 7. Point 701, mesh point 702 - mesh point N. For example, the processor may include layer L2 hardware or software in a media access control or station management entity (SME). For example, the layer L2 software can be part of an operation and maintenance (Q&M) routine in a mesh point or a combination thereof. Alternatively, the signaling system is implemented as a layer L3 or above signaling packet or information component (e.g., added to an Internet Protocol packet or Transmission Control Protocol (TCP)/Internet Protocol packet, etc.). As such, the entity implementation may include layer L3 hardware or software, such as an Internet Protocol or Simple Network Management Protocol (SNMP) entity. Another alternative involves layer L2 and L3 signaling combinations.

All the signal transmission information and information exchanged as described above can be sent to the link (such as mesh point-mesh point signal transmission frame) or multi-hop frame signal transmission (such as mesh point transmission via intermediate transfer network point) Message to another mesh point). Furthermore, signal transmission can occur between the mesh point in the wiring backhaul and another node.

All of the above methods can accept or be complementary to the configuration settings in each mesh point, and can provide statistics and feedback to the internal mesh or external network monitoring and control entities that can be moved to the mesh point operating characteristics (if used) Remote IT administrator network monitoring software). These configuration settings and reportable statistics can be started or reported from each (group) mesh point by the following format or a combination thereof:

a) the physical layer, the media access control or the database in the station management entity may advantageously be implemented (but not limited to) as Management Information Bases (MIBs);

b) transmitting a message between layer 2 media access control or station management entities advantageously implemented as an application programming interface (API) type to the above agreed entity; or

c) The primitives are exchanged between the station management entity, the media access control, the physical layer and other agreed entities in the implementation of the mesh point.

The above configuration settings that can be used by an external management entity on a mesh point (or mesh point group) can include any of the following:

a) allow transmission, reception and channel condition evaluation value settings and ranges;

b) allow mode settings (such as 11a, b, g, j, n, etc.);

c) allowable frequency band and sub-band settings (eg 2.4, 4.9, 5 GHz, U-NII low, medium and high frequency bands, etc.);

d) the mesh transmission power control feature is turned on or off;

e) the address and identifier of the power master station;

f) the timer value of the transmit power control (eg channel camping and measurement interval);

g) a transmission power change command for the mesh point; or

h) any combination thereof.

Reportable statistics in the mesh points that can be used by externally managed entities can include, but are not limited to, any of the following or a combination thereof:

a) current transmit power control settings, mode, bandwidth, number of simultaneous mesh points (or combinations thereof) and adjacent mesh points (currently known); or

b) Channel statistics such as measured values and types being executed.

AP. . . Access point

MP. . . Mesh point

PM. . . Power master

STA. . . Simple station

MAP. . . Mesh access point

Figure 1 shows a block diagram of a traditional wireless local area network.

Figure 2 shows a block diagram of a simple mesh infrastructure.

Figures 3A and B show signal transmission diagrams for power performance information exchange between the mesh point and the power main mesh point.

Figures 3C and D show signal transmission diagrams for interference power performance information exchange between mesh points.

Figures 4A and B show the signal transmission diagrams for the power setting information of the mesh system retrieved from the power main mesh point.

Figures 4C and D show the signal transmission diagrams for the power setting information retrieved from the mesh system of other mesh points.

Figure 5 is a diagram showing the transmission power control signal in accordance with the present invention.

Figure 6 shows a signal diagram in response to the received power setting information adjusting the mesh point transmit power setting.

Figure 7 shows the power master selection program signal diagram.

MP. . . Mesh point

Claims (23)

A method for controlling a mobile station in a wireless network for controlling a transmit power level, the method comprising: transmitting performance information of the mobile station, including an indication of a channel bandwidth supported by the mobile station; Receiving allowed power setting information from another mobile station associated with the wireless network, wherein the allowed power setting information includes an indication of one of maximum transmission power and channel frequency and bandwidth; and according to the other mobile station The allowed power setting information determines a transmission power level of the mobile station. The method of claim 1, wherein the transmission comprises at least one of a propagation transmission, a multicast transmission, or a unicast transmission, and wherein the transmission further comprises a request or an unsolicited manner Transfer. The method of claim 1, wherein the transmitting is performed during a linking procedure or a verification procedure. The method of claim 1, wherein the transmitting is performed during a beacon interval or a probe response procedure. The method of claim 1, wherein the transmitting comprises transmitting a special purpose per-link message containing the performance information or a multi-hop message containing the power performance information. The method of claim 1, wherein the performance information comprises at least one of transmit power step information, received power step information, operation mode information, bandwidth information, or frequency band information. The method of claim 1, wherein the receiving comprises receiving the allowed power setting information by at least one of a broadcast message, a multicast message, or a unicast message, and the receiving It includes receiving in a request mode or an unsolicited manner. The method of claim 1, wherein the receiving comprises receiving the allowed power setting information in a beacon frame or a probe response frame. The method of claim 1, wherein the receiving comprises receiving the allowed power setting information in a link or a verification frame. The method of claim 1, wherein the receiving comprises receiving the allowed power setting information in a special purpose per-link frame or a multi-hop allowed power setting frame. The method of claim 1, wherein the allowed power setting information includes power master station (PM) information, operation mode information, frequency band information, transmission power information, received power information, clearance channel evaluation threshold information, timing At least one of information, measurement information, mute period information, or offset information. The method of claim 1, wherein the allowed power setting information is associated with at least one of a network, a link, a path, a node, or a wireless interface. The method of claim 1, wherein the allowed power setting information comprises an absolute value, a relative value or a combination of an absolute value and a relative value. For example, the method described in claim 1 further includes: Establish a point-to-point relationship with the other mobile station associated with the wireless network. The method of claim 1, further comprising: establishing a master-slave relationship with the other mobile station associated with the wireless network. The method of claim 1, further comprising: periodically receiving the updated allowed power setting information. The method of claim 1, further comprising: transmitting a measurement regarding at least one of a power setting, a perceived signal noise ratio (SNR), a link tolerance value, a perceived interference power, or a channel busy time. request. The method of claim 1, wherein the another mobile station associated with the wireless network is a power master station (PM). The method of claim 1, wherein the mobile station is a power master station (PM). The method of claim 19, wherein the PM is identified as part of an initial setup procedure. The method of claim 1, wherein the transmitting comprises transmitting at least one of a layer 2 frame, a layer 2 information component, a higher layer packet, or a higher layer information component. The method of claim 1, further comprising: transmitting the plurality of statistics and feedback to a controlling entity. The method of claim 22, wherein the plurality of statistics includes current transmission power control (TPC) setting information, mode information, and bandwidth. At least one of information, simultaneous channel information, or channel statistic information.