RU2372738C2 - Method of control of transmission power on basis of evaluation of bit of reverse activity and prescribed linear-increasing/decreasing functions of data flows and corresponding terminal of wireless access - Google Patents

Abstract

FIELD: information technologies.

SUBSTANCE: access terminal is configured for wireless connection to access network in sector. Access terminal includes transmitter for transmission of signal of reverse data flow to access network, antenna for receiving of signals from access network, processor and memory connected to processor electrically. Commands are stored in memory. All the commands are composed to make evaluation of current value of bit of reverse activity transmitted by access network possible. Assigned power for each flow may be decreased or increased on the basis of evaluated current value of bit of reverse activity.

EFFECT: improvement in operation of level of control of access to transmission media of access terminal.

13 cl, 27 dwg

Description

Priority claiming

This patent application claims priority to provisional application US No. 60 / 487,648, entitled “Differentiated reverse link services for a multi-stream communication system using autonomous resource assignment”, claimed July 15, 2003, the rights to which are transferred to the owner of the present invention, and which is expressly incorporated herein by reference.

This patent application also claims priority for provisional application US No. 60 / 493,782, entitled "Joint autonomous and planned resource allocation for a distributed communications system", filed August 6, 2003, the rights of which belong to the owner of the present invention, and which is specifically incorporated into the present description by reference.

This patent application also claims priority for provisional application No. 60 / 527,081, entitled “Controlling access to the reverse link with multiple streams for a communication system”, claimed December 3, 2003, the rights to which belong to the owner of the present invention, and which is specifically included in the present description by reference.

FIELD OF THE INVENTION

The present invention relates, in General, to wireless communication systems and, more particularly, to improvements in the operation of the level of access control to the data medium (MAC, DTSP) access terminal in a wireless communication system.

State of the art

Communication systems are designed to transmit information signals from a departure station to a physically distinct destination station. When transmitting an information signal from a departure station through a communication channel, the information signal is first converted into a form suitable for efficient transmission through the communication channel. The conversion or modulation of the information signal includes changing the parameter of the carrier signal in accordance with the information signal so that the spectrum of the modulated carrier is within the frequency band of the communication channel. At the destination station, the original information signal is replicated from the modulated carrier signal received through the communication channel. Such replication is usually accomplished using the inverse of the modulation process used by the originating station.

Modulation also facilitates multiple access, i.e., the simultaneous transmission and / or reception of several signals through a common communication channel. Multiple access communication systems often include many remote subscriber units requiring intermittent service of relatively short duration, rather than constant access to a common communication channel. Several multi-access techniques are known in the art, such as code division multiple access (CDMA, CDMA), time division multiple access (TDMA, MDMA), frequency division multiple access (FDMA, FDMA) and multiple access with amplitude modulation (AM, AM).

A multiple access communication system may be wireless or wired and may carry voice and / or data. In a multiple access communication system, communications between users are conducted through one or more base stations. The first user at one subscriber station interacts with the second user at the second subscriber station by transmitting data on the reverse link to the base station. A base station receives data and can forward data to another base station. Data is transmitted on the forward channel of the same base station or another base station to a second subscriber station. The forward channel refers to transmission from the base station to the subscriber station, and the reverse channel refers to transmission from the subscriber station to the base station. Also, a communication link may be drawn between a first user of a mobile subscriber station and a second user of a landline station. The base station receives data from the user on the return channel and sends the data through the public switched telephone network (PSTN, PSTN) to the second user. In many communication systems, for example, IS-95, W-CDMA, IS-2000, separate frequencies are assigned to the forward and reverse channels.

An example of a communication system with data optimization is a communication system with a high data rate (HDR, HDR). In a communication system with the SPST, the base station is sometimes called an access network, and the remote station is sometimes called an access terminal (AT, TD). The functionality performed using the AP can be organized as a stack of levels, including the level of access control to the data transmission medium (DSPD). Level UCPD offers certain services for higher levels, including services that are associated with the operation of the return channel. Advantages can be realized with the help of improvements in the operation of the DTCPD level in a wireless communication system.

SUMMARY OF THE INVENTION

An access terminal that is configured for wireless communication with an access network is disclosed. The access terminal includes a transmitter for transmitting a reverse data stream signal to the access network, an antenna for receiving signals from the access network, a processor and memory electrically connected to the processor. Teams are remembered. The commands are feasible in order to implement a method that includes evaluating the current value of the reverse activity bit transmitted by the access network.

If the estimated current value of the reverse activity bit indicates that the sector is busy, the method also includes reducing the assigned current power for each stream from the plurality of flows in the access terminal. The amount of reduction for a particular stream can be determined in accordance with a linearly decreasing function that is intended for the stream. A linearly decreasing function may be a function of the assigned current power for the stream.

If the estimated current value of the reverse activity bit indicates that the sector is free, the method also includes increasing the assigned current power for each stream from the plurality of streams in the access terminal. The magnitude of the increase for a particular stream can be determined in accordance with a linearly increasing function that is intended for the stream. A ramp function may be a function of the assigned current power for the stream.

In some embodiments, the implementation of the evaluation of the current value of the bits of the inverse activity can be performed once in each time interval. The estimation may include filtering the signal received from the access network using a filter having an adjustable time constant.

The method may further include estimating a sector load level and determining an assigned maximum power for each stream from the plurality of flows. The assigned maximum power for a particular stream may be a function of the assigned current power for the stream and estimating the sector load level.

In some embodiments, the method may further include, for each stream, determining an assigned accumulated power for the stream. The assigned current power for the stream and the assigned stored power for the stream can be used to determine the total available power for the stream. The total available power for the stream can be used to determine the power level for the packet that is transmitted to the access network. In some embodiments, the assigned accumulated power for the stream may be limited by saturation. The saturation level may be an adjustable coefficient that is higher than the assigned maximum power.

Both a linearly decreasing function and a linearly increasing function may depend on an estimation of the sector load level. Alternatively or additionally, both the linearly decreasing function and the linearly increasing function may depend on the power of the pilot signal measured by the access terminal.

Another embodiment of an access terminal that is configured to wirelessly communicate with an access network in a sector is also disclosed. The access terminal includes means for evaluating the current value of the reverse activity bit transmitted by the access network.

The access terminal also includes means for decreasing the assigned current power for each stream from a plurality of streams in the access terminal if the estimated current value of the inverse activity bit indicates that the sector is busy. The amount of reduction for a particular stream can be determined in accordance with a linearly decreasing function that is intended for the stream. A linearly decreasing function may be a function of the assigned current power for the stream.

The access terminal also includes means for increasing the assigned current power for each stream from a plurality of streams in the access terminal if the estimated current value of the inverse activity bit indicates that the sector is free. The magnitude of the increase for a particular stream can be determined in accordance with a linearly increasing function that is intended for the stream. A ramp function may be a function of the assigned current power for the stream.

The access terminal may also include means for estimating a sector load level. The access terminal may also include means for determining the assigned maximum power for each stream from the plurality of streams. The assigned maximum power for a particular stream may be a function of the assigned current power for the stream and estimating the sector load level.

The access terminal may also include, for each stream, means for determining the assigned accumulated power for the stream, and means for using the assigned current power for the stream and the assigned stored power for the stream, to determine the total available power for the stream. The access terminal may also include means for using the total available power for the stream to determine the power level for the packet that is transmitted to the access network.

Brief Description of the Drawings

Figure 1 illustrates an example of a communication system that supports multiple users, and can implement at least some aspects of the embodiments discussed in this application.

FIG. 2 is a block diagram illustrating an access network and an access terminal in a high data rate communication system.

3 is a block diagram illustrating a stack of layers in an access terminal.

FIG. 4 is a block diagram illustrating an example of an interaction between high layers in an access terminal, a medium access control layer, and a physical layer.

5A is a block diagram illustrating a high throughput mode packet transmitted to an access network.

5B is a block diagram illustrating a low latency mode packet transmitted to an access network.

6 is a block diagram illustrating various types of streams that may be present in an access network.

FIG. 7 is a block diagram illustrating an example of a plurality of streams for a high throughput mode packet.

FIG. 8 is a flowchart illustrating an example set of streams for a low latency mode packet.

9 is a flowchart illustrating information that can be served at an access terminal in order to determine if a high throughput stream is included in a plurality of low-delay mode packet streams.

10 is a block diagram illustrating an access network and a plurality of access terminals in a sector.

11 illustrates an example of a mechanism that can be used to determine the total available power for an access terminal.

12 is a block diagram illustrating an embodiment in which at least some of the access terminals in a sector include multiple streams.

FIG. 13 is a flowchart illustrating one method in which an access terminal may receive an assigned current power for streams in an access terminal.

14 is a block diagram illustrating a reverse activity bit transmitted from an access network to an access terminal in a sector.

FIG. 15 is a flowchart illustrating information that may be served in an access terminal in order to determine an assigned current power for one or more streams in an access terminal.

16 is a functional diagram illustrating an example of functional components in an access terminal that can be used to determine an estimate of an inverse activity bit and an estimate of a current sector load level.

17 is a flowchart illustrating an example method for determining an assigned current power for a stream in an access terminal.

Fig. 18 is a block diagram illustrating an access terminal sending a request message to a scheduler over an access network.

FIG. 19 is a flowchart illustrating information that may be served in an access terminal so that the access terminal determines when to send a request message to the access network.

20 is a block diagram illustrating an example of interaction between a scheduler running in an access network and access terminals in a sector.

21 is a flowchart illustrating another example of interaction between a scheduler and an access terminal running in an access network.

22 is a block diagram illustrating another embodiment of a permission message that is transmitted from a scheduler over an access network to an access terminal.

23 is a block diagram illustrating a power profile that may be stored in an access terminal.

24 is a block diagram illustrating a plurality of transmission conditions that may be stored in an access terminal.

25 is a flowchart illustrating an example of a method that an access terminal can perform in order to determine a payload size and a power level for a packet;

FIG. 26 is a functional diagram illustrating an embodiment of an access terminal.

Detailed Description of Embodiments

The word “exemplary” is used in this application to mean “serving as an example, individual case or illustration”. The embodiment described herein as “exemplary” does not have to be construed as preferred or advantageous over other embodiments.

It should be noted that an exemplary embodiment is provided as an example throughout this discussion, however, alternative embodiments may contain various aspects without departing from the scope of the present invention. Specifically, the present invention is applicable to data processing systems, wireless communication systems, mobile IP networks, and any other systems that require receiving and processing wireless signals.

An exemplary embodiment uses a broadband wireless communication system. Wireless communication systems are widely used to provide various types of communication, such as speech, data, etc. These systems can be based on code division multiple access (CDMA), time division multiple access (TDMA), or some other modulation methods. A CDMA system provides certain advantages over other types of systems, including increased system throughput.

A wireless communication system may be designed to support one or more standards, such as the “TIA / EIA / IS-95-B Mobile Station-Base Station Compatibiliti Standard for Dual-Mode Wideband Spread Spectrum Cellular System” referred to in the present description as the IS-95 standard, a standard proposed by a consortium called the “3 ^rd Generation Partnership Project”, referred to in this description as 3GPP, and embodied in many documents, including documents No. 3GPP TS 25.211 , 3GPP TS 25.212, 3GPP TS 25.213 and 3GPP TS 25.214, 3GPP TS 25.302; the standard referred to in the present description as the W-CDMA standard proposed by the consortium called “3 ^rd Generation Partnership Project 2”, referred to in the present description as 3GPP2; and the TR-45.5 standard, referred to herein as the cdma2000 standard, formerly called the IS-2000 MS. The standards mentioned above are expressly incorporated herein by reference.

The systems and methods described in this application can be used with communication systems with a high data rate (SPST). ATSP communication system can be designed to meet one or more standards, such as the “cdma2000 High Rate Packet Data Air Interfase Specification”, 3GPP2 C.S0024, Version 1, March 2004, published by the 3rd Partnership Project 2 consortium generation. ” The contents of the above standards are incorporated herein by reference.

A subscriber station of the URTN, which may be referred to in the present description as an access terminal (AT, TD), can be mobile or stationary, and can communicate with one or more base stations of the URTD. The access terminal transmits and receives data packets through one or more modem pool transceivers (MRI, PMP) to the controller of the VSPD base station, which may be referred to in the present description as a modem pool controller (MPC, ILC). Modem pool transceivers and modem pool controllers are parts of a network called an access network. An access network transmits data packets between multiple access terminals. The access network can additionally be connected to additional networks outside the access network, such as a corporate intranet or the Internet, and can transmit data packets between each access terminal and such external networks. An access terminal that establishes a connection of an active data stream transmission channel to one or more modem pool transceivers is called an active access terminal, and is referred to as being in a data stream transmission state. An access terminal that is in the process of establishing a connection of an active channel for transmitting a data stream with one or more modem pool transceivers is referred to as being in a connection state. An access terminal may be any data device that communicates via a wireless channel or through a wired channel, for example using fiber optic or coaxial cables. The access terminal may optionally be any of several types of devices, including, but not limited to, a PC card, compact flash memory, external or internal modem, or a cordless or landline telephone. The communication channel through which the access terminal sends signals to the transceiver of the modem pool is called the return channel. The communication channel through which the modem pool transceiver sends signals to the access terminal is called a direct channel.

FIG. 1 illustrates an example communication system 100 that supports multiple users and can implement at least some aspects of the embodiments discussed herein. Any of a variety of algorithms and methods can be used to schedule transmissions in system 100. System 100 provides data exchange for multiple cells 102A-102G, each of which is served by a corresponding base station 104A-104G, respectively. In an exemplary embodiment, some of the base stations 104 have multiple receiving antennas, while others have only one receiving antenna. Similarly, some of the base stations 104 have multiple transmit antennas, while others have a single transmit antenna. There are no restrictions on the combination of transmitting antennas and receiving antennas. Therefore, it is possible for base station 104 to have multiple transmit antennas and one receive antenna, or have multiple receive antennas and one transmit antenna, or have one transmit and receive antenna, or multiple transmit and receive antennas.

Remote stations 106 in the coverage area may be fixed (or stationary) or mobile. As shown in FIG. 1, various remote stations 106 are distributed throughout the system. Each remote station 106 interacts with at least one, and possibly with more base stations 104, on the forward channel and the reverse channel at any given moment, depending, for example, on whether soft-handoff technology has been used, or, the terminal is designed and operates to receive (simultaneously or sequentially) multiple transmissions from multiple base stations. The “soft handoff” technology in CDMA communication systems is widely known in the art and is described in detail in US Pat. No. 5,101,501 entitled “Method and System for Providing Soft Handoff in a CDMA Cellular Telephone System”, the rights of which belong to the owner of the present invention.

The forward channel refers to transmission from the base station 104 to the remote station 106, and the reverse channel refers to transmission from the remote station 106 to the base station 104. In an exemplary embodiment, some of the remote stations 106 have multiple receiving antennas, while others have only one receiving antenna . 1, the base station 104A transmits data to the remote stations 106A and 106J on the forward channel, the base station 104B transmits data to the remote stations 106B and 106J, the base station 104C transmits data to the remote station 106C, etc.

In a communication system with a high data rate (SPSP), the base station is sometimes referred to as an access network (AN, AN), and the remote station is sometimes referred to as an access terminal (AT). Figure 2 illustrates the SD204 and the AP 206 in the communication system VSPD.

The AP 206 is in a state of wireless communication with the LED 204. As previously indicated, the reverse channel refers to transmissions from the AP 206 to the LED 204. The reverse channel 208 for transmitting the data stream is shown in FIG. The reverse data stream transmission channel 208 is part of a reverse channel that transmits information from a particular AP 206 to the LED 204. Of course, the reverse channel may include other channels in addition to the reverse data stream transmission channel 208. Also, the forward channel may include multiple channels, including a pilot channel.

Functions performed using the AP 206 can be organized as a stack of levels. Figure 3 illustrates the stack of levels in the AP 306. Among the layers there is a level 308 access control to the data transmission medium (DRMD). Higher levels 310 are located above the level 308 UDP. Level 308 UDPSD offers certain services to higher levels 310, including services that relate to the operation of the reverse channel 208 data stream. Level 208 UDPSD includes the implementation of the protocol 314 UDPSD reverse channel data stream (RTC, OKPPD). Protocol 314 UDPSD OKPD provides procedures performed using the TD 306 to transmit, and using the LED 204 to receive on the return channel 208 data stream.

The physical layer 312 is located below the level 308 UDP. Level 308 UDPSD requests certain services from the physical layer 312. These services relate to the physical transmission of packets to the AN 204.

FIG. 4 illustrates an example of the interaction between the high layers 410 in the AT 406, the DRC layer 408 and the physical layer 412. As shown, the DRC layer 408 receives one or more streams 416 from the high layers 410. The stream 416 is a data stream. Typically, stream 416 corresponds to a specific application, such as voice over IP (VoIP), video telephony, file transfer protocol (FTP), games, etc.

Data from streams 416 to the AT 406 is transmitted to the AN 204 in packets. In accordance with the Protocol 414 UDPSD OKPDD level UDPSD defines a set of 418 flows for each packet. Sometimes, multiple streams 416 in the AT 406 have data to transmit at the same time. A packet may include data from more than one stream 416. However, sometimes there may be one or more streams 416 in the AP 406 that have data to transmit, but they are not included in the package. A plurality of packet streams 418 indicates the streams 416 in the AT 406 to be included in the packet. Exemplary methods for determining a plurality of packet streams 418 will be described below.

The DRCTD layer 408 also determines the payload size 420 of each packet. The packet payload size 420 indicates how much data from a plurality of 418 streams is included in the packet.

The DRCTD level 408 also determines the packet power level 422. In some embodiments, the packet power level 422 is determined relative to the power level of the reverse pilot channel.

For each packet that is transmitted to the LED 204, the DRCTD layer 408 transmits a plurality of 418 streams included in the packet, the packet payload size 420, and the packet power level 422 to the physical layer 412. The physical layer then transmits the packet to the LED 204 in accordance with the information provided through level 308 DUA.

5A and 5B illustrate packets 524 transmitted from an AP 506 to an LED 504. Packet 524 may be transmitted in one of several possible transmission modes. For example, in some embodiments, there are two possible transmission modes, a high throughput transmission mode and a low latency transmission mode. Fig. 5A illustrates a high bandwidth mode packet 524a (i.e., a packet 524a that is transmitted in high bandwidth mode) transmitted to an LED 504. Fig. 5B illustrates a low latency mode packet 524b (i.e., packet 524b, which is transmitted in the low-latency mode) transmitted to the SD 504.

The low latency mode packet 524b is transmitted at a higher power level 422 than the high bandwidth mode packet 524 of the same packet size. Therefore, it is likely that the low latency mode packet 524b will arrive in the LED 504 rather than the high throughput mode packet 524. However, the low latency mode packet 524b causes a greater load on the system 100 than the high throughput mode packet 524.

6 illustrates various types of streams 616 that may exist in an AT 606. In some embodiments, each stream 616 in an AT 606 is associated with a particular transmission mode. Where the possible transmission modes are a high throughput transmission mode and a low latency transmission mode, the AP 606 may include one or more high throughput streams 616a and / or one or more low delay streams 616b. Preferably, the high throughput stream 616a is transmitted in the high throughput packet 524a. Preferably, the low latency stream 616b is transmitted in the low latency packet 524b.

7 illustrates an example of a plurality of streams 718 for a high throughput mode packet 524a. In some embodiments, packet 724a is transmitted in high bandwidth mode if all streams 716 that have data to transmit are high bandwidth streams 716a. Thus, in some embodiments, the plurality of 718 streams in the high throughput mode packet 524a include only the high throughput streams 716a. Alternatively, the low latency streams 616b may be included in the high throughput mode packets 724a at the discretion of the AT 606. One example of the reason for this is when the low latency stream 616b does not receive sufficient bandwidth. For example, it might be detected that a queue of low delay flows 616b is created. A stream can increase its throughput by using a high throughput mode instead by increasing latency.

FIG. 8 illustrates an example of a plurality of stream 818 for low delay mode packets 824b. In some embodiments, if there is at least one low latency stream 616b that has data to transmit, then packet 824b is transmitted in low latency mode. The plurality of 818 streams in the low latency mode packet 824b includes each low latency stream 616b that has data for transmission. One or more high throughput streams 816a that have data to transmit may also be included in multiple 818 streams. However, neither one nor more of the high throughput streams 816a that have data for transmission can be included in a plurality of 818 streams.

FIG. 9 illustrates information that may be served in an AP 906 to determine whether a high throughput stream 916a is included in a plurality of 818 streams of a low latency packet 824b. Each high throughput stream 916a in the AP 906 has a certain amount of data 926 available for transmission. A combining threshold 928 for each high throughput stream 916a in the AP 906 may also be determined. In addition, a combining threshold 928 may be defined for the AP 906 as a whole. Finally, the combination of high throughput flows can occur when the estimation of the sector load level is less than the threshold value (how the estimation of the sector load level will be discussed below). That is, when the sector is very lightly loaded, the losses in the efficiency of the association are insignificant, and intensive use is permissible.

In some embodiments, high throughput stream 916a is included in low latency packet 524b if one of two conditions is met. The first condition is that the sum of the transmitted data 926 for all high throughput streams 916a in the AP 906 exceeds the combining threshold 930 that is defined for the AP 906. The second condition is that the sum of the transmitted data 926 of the high throughput streams 9 exceeds the threshold 928 combining, which is defined for stream 916a high bandwidth.

The first condition relates to transmitting power from low latency packets 824b to high throughput mode packets 724a. If the high throughput streams 916a are not included in the low delay mode packets 824b, data from the high throughput streams 916a is created as long as there is data available for transmission from at least one low delay stream 816b. If it is allowed to accumulate too much data from the high throughput streams 916a, then the next transmission of the high throughput mode packet 724a may result in an unacceptably sharp power drop from the last low delay packet 824b to the high throughput mode packet 724a. Therefore, according to the first condition, when the amount of transmitted data 926 from the high throughput streams 916a in the AP 906 exceeds a certain amount (determined using the combining threshold 930), “combining” the data from the high throughput streams 916a into low delay mode packets 824b allowed.

The second condition relates to Quality of Service (QOS) requirements for high throughput streams 916a in the AT 906. If the combining threshold 928 for the high throughput stream 916a is set to a very large value, this means that the high throughput stream 916a is rare. even if it is included in low latency mode packet 824b. Therefore, such a high throughput stream 916a may experience transmission delays since it is not transmitted whenever there is at least one low delay stream 816b with data for transmission. Conversely, if the combining threshold 928 for the high throughput stream 916a is set to a very small value, this means that the high throughput stream 916a is almost always included in the low latency packet 824b. Therefore, such high throughput streams 916 may experience very low transmission delay. However, such high throughput streams 916a use more sector resources to transmit their data.

Advantageously, in some embodiments, the combining threshold 928 for some high throughput streams 916a in the AP 906 can be set to a very large value, while the merging threshold 928 for some other high throughput streams 916a in the AP 906 can be set to a very small threshold 928 unification. Such an arrangement is advantageous since some types of high throughput streams 916a may have strict QoS requirements, while others may not have such requirements. An example of a stream 916 that has strict QoS requirements and that can be transmitted in high throughput mode is real-time video. Real-time video has high bandwidth requirements, which can make it inefficient for low-latency transmission. However, arbitrary transmission delays are undesirable for real-time video. An example of a stream 916 that does not have strict QoS delay requirements, and which can be transmitted in high throughput mode, is a best attempt stream 916.

10 illustrates LEDs 1004 and a plurality of APs 1006 in sector 1032. Sector 1032 is a geographic area in which signals from LEDs 1004 can be received using APs 1006, and vice versa.

One feature of some wireless communication systems, such as code division multiple transmission (CDM) based systems, is that the transmissions interfere with each other. Therefore, in order to ensure that there is not too much interference between the AP 1006 in the same sector 1032, there is a limited amount of power received in the LED 1004 that the AP 1006 can share. In order to ensure that the AP 1006 remains in this limit, a certain amount of power 1034 exists for each AP 1006 in sector 1032 for transmission on the reverse channel 208 data stream. Each AP 1006 sets the power level 422 of packets 524, which it transmits on the reverse channel 208 of the data stream so that it does not exceed its total available power 1034.

The power level 1034, which is allocated in the AP 1006, may not be exactly equal to the power level 422, which the AP 1006 uses to transmit packets 524 on the reverse channel 208 data stream. For example, in some embodiments, there are many discrete power levels that the AP 1006 selects from the determination of the power level 422 of packet 524. The total available power 1034 for the AP 1006 may not be exactly equal to any of the discrete power levels.

The total available power 1034, which is not used at any given point in time, is acceptable for accumulation so that it can be used at the next point in time. Therefore, in some embodiments, the total available power 1034 for the AP 1006 is (approximately) equal to the assigned current power 1034a plus at least some of the assigned stored power 1034b. The AP 1006 determines the power level 422 of the packet 524 so that it does not exceed the total available power 1034 for the AP 1006.

The total available power 1034 for the AP 1006 may not always be equal to the assigned current power 1034a of the AP 1006 plus the assigned accumulated power 1034b of the AP 1006. In some embodiments, the total available power 1034 of the AP 1006 may be limited by the maximum assigned power of 1034s. The maximum assigned power 1034c for the AP 1006 may be equal to the assigned current power 1034a for the AP 1006 multiplied by some limiting factor. For example, if the limiting factor is two, then the maximum assigned power 1034c of the AP 1006 is equal to its twice the assigned current power 1034a. In some embodiments, the limiting factor is a function of the assigned current power 1034a for the AP 1006.

Providing a maximum assigned power of 1034 for an AP can limit the amount of “ripple,” allowable transmissions of the AP 1006. For example, it may happen that the AP 1006 does not have data to transmit for a certain period of time. During this time period, power can continue to be assigned in the AP 1006. Since no data is available for transmission, the assigned power is accumulated. At some point in time, the AP 1006 may suddenly have a relatively large amount of data to transmit. At this point in time, the assigned stored power 1034b may be relatively large. If the AP 1006 would be allowed to use all the assigned accumulated power 1034b, then the transmitted power 422 of the AP 1006 could experience a sudden rapid increase. However, if the transmitted power 422 of the AP 1006 increases too quickly, this may affect the stability of the system 100. Thus, the maximum assigned power 1034c can be provided for the AP 100 to limit the total available power 1034 of the AP 1006 in circumstances like this. It should be noted that the purpose of the accumulated power 1034b is still available, but its use is distributed among a large number of packets when the maximum assigned power 1034 is limited.

11 illustrates an example mechanism that can be used to determine the total available power 1034 for the AP 206. The mechanism includes the use of a virtual “drive” 1136. At regular intervals, the assigned new current power 1034a is added to the drive 1136. Also at periodic intervals, the level 422 of the power of packets 524 transmitted by the AP 206 leaves the drive 1136. The amount by which the assigned current power of 1034 exceeds the level of 422 power of the packets is the assigned accumulated power nost 1034b. The assigned stored power 1034b remains in the drive 1136 until it is used up.

The total available power 1034, minus the assigned current capacity 1034a, is the total potential consumption from drive 1136. The AP 1006 ensures that the power level 422 of the packets 524 it transmits does not exceed the total available power for the AP 1006. As indicated earlier, for certain circumstances, the total available power 1034 is less than the sum of the assigned current power 1034a and the assigned stored power 1034b. For example, the total available power 1034 may be limited by the assigned maximum power 1034s.

The assigned stored power 1034b may be limited by saturation level 1135. In some embodiments, the saturation level 1135 is a function of the amount of time that the AP is allowed to use its assigned maximum power of 1034s.

12 illustrates an embodiment in which at least some of the APs 1206 in sector 1232 include a plurality of streams 1216. In such an embodiment, a separate amount of available power 1238 may be determined for each stream 1216 in the AP 1206. Available power 1238 for stream 1216 in the AP 1206 may be determined in accordance with the methods described previously in connection with FIG. 10-FIG. 11. More specifically, the total available power 1238 for stream 1216 may include the assigned current power 1238a for stream 1216 plus at least some of the assigned current power 1238b for stream 1216. In addition, the total available power 1238 for stream 1216 may be limited maximum assigned power 1238c for stream 1216. A separate drive mechanism, such as the mechanism shown in FIG. 11, can be supported for each stream 1216, in order to determine the total available power 1238 for each stream 1216. Full I'm available power 1238 for the AT 1206 may be determined by summing the total available power 1238 for various streams 1216 1206 TD.

The following is a mathematical description of various formulas and algorithms that can be used to determine the total available power 1238 for stream 1216 in TD 1206. In the equations described below, the total available power 1238 for each stream i in TD 1206 is determined once in each subframe ( in some embodiments, the subframe is four time intervals and the time interval is 5/3 ms). The total available power of 1238 is referred to in the equations as PotentialT2Poutflow.

The total available power 1238 for stream i transmitted in high bandwidth mode packet 524a can be expressed as:

The total available power 1238 for stream i transmitted in low latency packet 524a can be expressed as:

BucketLeveli, n is the assigned accumulated power 1238b for stream i in subframe n. T2Pinflow is the assigned current power 1238a for stream i in subframe n. BucketFactor (T2Pinflowi, n, FRABi, n) xT2Pinflowi, n - assigned maximum power 1238s for stream i in subframe n. BucketFactor (T2Pinflowi, n, FRABi, n) is a function designed to determine the restriction coefficient for the total available power 1238, i.e., the coefficient by which the total available power 1238 for stream i in subframe n is allowed to exceed the current power setting 1238a for the stream i in subframe n. FRABi, n is an estimate of the load level of sector 1232, and will be discussed in more detail below. AllocationStagger is the amplitude of a random term in the equation that erodes assignment levels to eliminate synchronization problems, and rn is a real random number uniformly distributed over the range [-1,1].

The assigned accumulated power 1238b for stream i in subframe n + 1 can be expressed as:

T2Poutflowi, n is part of the transmitted power 422, which is proportionally distributed in stream i in subframe n. An example equation for T2Poutflowi, n is provided below. BucketLevelSati, n + 1 - saturation level 1135 for the assigned accumulated power 1238b for stream i in subframe n + 1. An example equation for BucketLevelSati, n + 1 is provided below.

T2Poutflowi, n can be expressed as:

In equation 4, di, n is the amount of data from stream i that is included in a subpacket that is transmitted during subframe n (the subpacket is part of the packet that is transmitted during the subframe). SumPayloadn - sum di, n. TxT2Pn is a subpacket power level 422 that is transmitted during subframe n.

BucketLevelSati, n + 1 can be expressed as:

BurstDurationFactori - restriction on the length of time when stream i is allowed to transmit at the destination with a maximum power of 1238s.

FIG. 13 illustrates one method in which an AP 1306 can receive the assigned current power 1338a for streams 1316 in the AP 1306. As shown, the AP 1306 may receive a permission message 1342 from a scheduler 1340, which is executed in the LED 1304. The permission message 1342 may include the resolution 1374 of the assigned current power for some or all of the streams 1316 in the AP 1306 itself. For each received resolution 1374 of the assigned current power, the AP 1306 sets the assigned current power 1338a for the corresponding stream equal to the resolution 1374 of the assigned t current power.

In some embodiments, obtaining the assigned current power 1338a is a two-step process. The first step includes determining whether the resolution 1374 of the assigned current power for the stream from LED 1304 is accepted. If not, then the AP 1306 autonomously determines the assigned current power 1338a for the stream 1216. In other words, the AP 1306 determines the assigned current power 1338a for the stream 1216 without interventions from scheduler 1340. The following discussion relates to exemplary methods for an AP 1306 to autonomously determine an assigned current power 1338a for one or more threads 1316 in an AP 1306.

Fig. 14 illustrates a Reverse Activity Bit (RAB, BOA) 1444 transmitted from LED 1404 to AT 1406 in sector 1432. BOA 1444 is an indication of congestion. BOA 1444 may be one of two values, the first value (e.g., +1), which indicates that sector 1432 is currently occupied, or the second value (e.g., -1), which indicates that sector 1432 is currently free. As will be explained below, the BOA can be used to determine the assigned current power 1338a for streams 1216 in the AP 1206.

FIG. 15 illustrates information that can be serviced by an AT 1506 in order to determine an assigned current power 1338a for one or more streams in an AT 1506. In the illustrated embodiment, each stream 1516 is associated with a “quick” estimate of the BRA 1444. This quick estimate will referred to in the present description as QRAB, FACS 1546. An example of a method for determining FACS 1546 will be described below.

Each stream 1516 is also associated with an assessment of the continuous load level of sector 1232, referred to herein as FRAB, TSFVA 1548 (which means “filtered” BOA 1444). The TSF is a real number that lies somewhere between the two possible values of the BOA 1444. The closer the TSF is 1548 to the value of the BOA 1444, which indicates that sector 1432 is busy, the more loaded the sector 1432. Conversely, the closer the TSF is to the value BOA 1444, which indicates that the sector 1432 is free, the less loaded is the sector 1432. An example of a method for determining the TSF 1548 will be described below.

Each stream is also associated with a linearly increasing function 1550 and a linearly decreasing function 1552. A linearly increasing function 1550 and a linearly decreasing function 1552 associated with a particular stream 1516 are functions of the assigned current power 1238a for stream 1516. A linearly increasing function 1550 associated with stream 1516 , used to determine the increase in the assigned current power 1238a for the stream 1516. Conversely, a linearly decreasing function 1552 associated with the stream 1516 is used to determine the decrease in the assigned current power 1238a for stream 1516. In some embodiments, both the linearly increasing function 1550 and the linearly decreasing function 1552 depend on the value of the TSFL 1548 and the assigned current power 1238a for the stream 1516.

A linearly increasing function 1550 and a linearly decreasing function 1552 are determined for each stream 1516 in the network, and they are downloadable from the LED 1404 controlling the stream AP 1506. The ramp function 1550 and the ramp function 1552 have an assigned current flow power 1238a as their argument. A linearly increasing function 1550 will sometimes be referred to in the present description as gu, and a linearly decreasing function 1552 will sometimes be referred to in the present description as gd. Applicants cite the gu / gd ratio (also a function of the assigned current power 1238a) as a function of demand. It can be demonstrated that the RLMac algorithm, which depends on the data and availability of the access terminal power, converges to the assigned current power 1238 for each stream 1516, so that all values of the demand function of the flows are equal when taken when they are assigned to the stream. Using this fact, by carefully compiling the thread demand function, you can get the same general display of the flow layout and resource assignment requirements as achieved with a centralized scheduler. But the need function method achieves the possibility of general planning with minimal transmission of control signals and in a fully decentralized way.

Fig is a block diagram illustrating exemplary functional components in the AP 1606, which can be used to determine the FWA 1646 and TSF 16A. As shown, the AP 1606 may include a component 1654 demodulation BOA, the converter 1656, the first and second unipolar filters 1658, 1660 IIR, IIR (infinite impulse response) and limiting device 1662.

BOA 1644 is transmitted from SD 1604 to TD 1606 via communication channel 1664. The BOA demodulation component 1654 performs demodulation of the received signal using standard methods that are known to those skilled in the art. The BOA demodulation component 1654 outputs a logarithmic probability coefficient (LLR, CLW) 1666. The converter takes the CLW 1666 as an input signal and converts the CLW 1666 to a value that falls between the possible values of the BOA 1644 (for example, +1 and -1), which is an estimate of the transmitted BOA for this time interval.

The output of converter 1656 is fed to a first IIP 1658 IIR filter. The first IIR 1658 filter has a time constant τ _s . The output signal of the first IIR filter 1658 is supplied to the limiting device 1662. The limiting device 1662 converts the output signal of the first IIR filter 1658 to one of two possible values corresponding to the two possible values of BOA 1644. For example, if BOA 1644 was either -1 or +1, then the limiting device 1662 converts the output of the first IIR filter 1658 to either -1 or +1. The output signal of the limiting device 1662 is the BWA 1646. The time constant τ _{s is} chosen so that the BWA 1646 represents an estimate of what the current value of the BOA 1644 transmitted from the LED 1604 is equal. The approximate value for the time constant τ _s is four time intervals.

The output of converter 1556 is also supplied to a second IIR single pole filter 1660 having a time constant τ ₁ . The output signal of the second IIR filter 1660 is FBOA 1648. The time constant τ _{1 is} much larger than the time constant τ _s . The approximate value for the time constant τ ₁ is equal to 384 time intervals.

The output of the second IIR filter 1660 is not supplied to the limiting device. Therefore, as described above, the TSF 1648 is a real number that lies somewhere between the first BOA value 1644, which indicates that the sector 1432 is busy, and the second BOA value 1644, which indicates that the sector 1432 is free.

FIG. 17 illustrates an example method 1700 for determining an assigned current power 1238a for stream 1216 in an AT 1206. Step 1702 of method 1700 includes determining a value of AEC 1546 that is associated with a stream 1216. At step 1704, it is determined whether the AEC 1546 is equal to busy state (i.e., a value that indicates that sector 1432 is currently busy). If the BWA 1546 is equal to the occupied state value, then at step 1706 the assigned current power 1238 is reduced, i.e., the assigned current power 1238 for stream 1216 at time n is less than the assigned current power 1238 for stream 1216 at time n-1. The magnitude of the reduction can be calculated using a linearly decreasing function 1552, which is defined for the stream 1216.

If the BWA 1546 is equal to the free state value, then at step 1708 the assigned current power 1238 is increased, i.e., the assigned current power 1238 for stream 1216 during the current time interval is greater than the assigned current power 1238 for stream 1216 during the most recent time interval . The magnitude of the increase can be calculated using a ramp function 1550, which is defined for stream 1216.

The linearly increasing function 1550 and the linearly decreasing function 1552 are functions of the assigned current power 1238a, and are potentially different for each stream 1516 (loaded using LED 1404). In this way, the establishment of QoS differences on the stream using the autonomous assignment is obtained. Also, the value of the linear function can change with TSF 15A, meaning that the dynamics of the linearity of the change can change with the load, which makes it possible to more quickly converge to a fixed point under less loaded conditions.

When the assigned current power 1238a is increased, the magnitude of the increase can be expressed as:

When the assigned current power 1238a is reduced, the magnitude of the increase can be expressed as:

T2PUpi is a linearly increasing function of 1550 for stream i. T2Pdpi is a linearly decreasing function 1552 for stream i. PilotStrengthn, s is a measure of the pilot power of a serving sector relative to the pilot power of other sectors. In some embodiments, the implementation is the ratio of the pilot power FL of a serving sector to the pilot power of other sectors. PilotStrengthi - a function that converts the intensity of the pilot signal into a correction in the argument of a linear function, and is loaded from the SD. Thus, the priority of the flows in the AP can be adjusted based on the location of the AP in the network, as measured using the PilotStrengthn, s variable.

The assigned current power 1238 may be expressed as:

As can be seen from the above equations, when the saturation level 1135 is reached and the ramp is set to zero, the assigned current power 1238 decays exponentially. This takes into account the establishment of the assigned current power 1238a for sources of uneven transmission of the data stream, for which the settling time should be longer than the usual time between two consecutive packets.

In some embodiments, the value of the BWA 1546 is estimated for each sector in the active set of the AP 1206. If the BWA is equal to the occupied state for any of the sectors in the active set of the AP, then the assigned current power 1238a is reduced. If the BOAA is equal to the free state for any of the sectors in the active set of APs, then the assigned current power 1238a is increased. In alternative embodiments, another parameter of BOAps, BOAps, may be determined. For BPOAps, the measured pilot signal strength is taken into account. (The pilot strength is a measure of the serving sector pilot power relative to the pilot strength of other sectors. In some embodiments, this is the ratio of the serving sector pilot power FL of the serving sector to the pilot strength of other sectors. BOAps are set to the busy state if The FWAA is equal to the busy state for sector s, which satisfies one or more of the following conditions: (1) sector s is the serving sector of the forward link; (2) the DRCLock bits from the sector and s is unlocked, and PilotStrengthn, s of sector s is greater than the threshold value; (3) the DRCLock bit from sector s is blocked, and PilotStrengthn, s of sector s is larger than the threshold value. Otherwise, FBOAps are set to the free state value. in which BOAps is determined, the assigned current power 1238 may be increased when the BOAps is equal to the idle state, and may be reduced when the BOAps is equal to the occupied state.

FIG. 18 illustrates an AP 1806 sending request message 1866 to scheduler 1840 in ST 1804. FIG. 18 also illustrates a scheduler sending permission message 1842 to AT 1806. In some embodiments, scheduler 1840 may send permission messages 1842 to AT 1806 in its own right. initiative. Alternatively, the scheduler 1840 may send permission messages 1842 to the AP 1806 in response to the request message 1866, which is sent by the AP 1806. The request message 1866 contains information at the heading of the AP power as well as information about the length of the queue per stream.

FIG. 19 illustrates information that may be served in an AT 1906 in order to determine for an AT 1906 when to send a request message 1866 to an AN 1804. As shown, the AT 1906 may be associated with a request coefficient 1968. The request coefficient 1968 indicates the ratio of the size 1866 of the request message sent on the return channel 208 of the data stream to the data sent on the return channel 208 of the data stream. In some embodiments, when the request coefficient 1968 decreases below a certain threshold value, then the AP 1906 sends a request message 1866 to the scheduler 1840.

TD 1906 may also be associated with a request interval 1970. The request interval 1970 indicates the period of time from the last request message 1866 that was sent to the scheduler 1840. In some embodiments, when the request interval 1970 increases above a certain threshold value, then the AP 1906 sends a request message 1866 to the scheduler 1840. Both methods for initiating a message Request 1866 can also be used together (i.e., request message 1866 can be sent when it is called in any way).

FIG. 20 illustrates an example of an interaction between scheduler 1040 running in LED 2004 and AP 2006 in sector 2032. As depicted in FIG. 20, scheduler 2040 can determine the permissions 1374 of the assigned current power for a subset of 2072 AP 2006 in sector 2032. Separate resolution 1374 the assigned current power can be determined for each AP 2006. When the AP 2006 in a subset of 2072 includes more than one thread 1216, the scheduler 2040 can determine the individual permissions 1374 of the assigned current power for some or all of the threads 1216 in each AP 20 06. Scheduler 2040 periodically sends permission messages 2042 to AP 2006 to subset 2072. Scheduler 2040 does not determine permission 1374 of the assigned current capacity for AP 2006 in sector 2032, which is not part of subset 2072. Instead, the rest of 2006 APs in sector 2032 autonomously determine their own designated current capacities 1038a. Permission messages 2042 may include a blocking period for some or all of the permissions 1374 of the assigned current power. The blocking period for resolution 1374 of the assigned current power indicates how long the AP 2006 maintains the assigned current power 1238 for the corresponding stream 1216 at the level set by the resolution 1374 of the assigned current power.

In accordance with the approach illustrated in FIG. 20, scheduler 2040 is not designed to fill all of the bandwidth in sector 2032. Instead, scheduler 2040 determines the assigned current capacity 1038a for AP 2006 in a subset of 2072, and then the remaining bandwidth of sector 2032 effectively used with the rest of the 2006 APs without intervention from the scheduler 2040. The subset 2072 may change over time and may even change with each permission message 2042. Also, the decision to send a permission message 2042 to a subset 2072 of the AP 2006 can be triggered by any number of external events, including the discovery that some threads do not satisfy certain QoS requirements.

FIG. 21 illustrates another example of interaction between a scheduler 2140 running in LED 2104 and an AP 2106. In some embodiments, if the AP 2106 is allowed to determine the assigned current power 2138a for the threads 2116 in the LED 2106, each of the assigned current power 2138a will be timed converge to the value of the steady state. For example, if one AP 2106 enters an unloaded sector 1232 with a stream 2116 that does not have data to transmit, the assigned current power 2138a for this stream 2116 will increase linearly until this stream 2116 occupies the entire bandwidth of sector 2132. However, for it may take some time for this to happen.

An alternative approach for the scheduler 2140 is to determine the steady state estimates that the threads in each AP 2106 will ultimately reach. Then, the scheduler 2140 can send a permission message 2142 to all APs 2106. In the permission message 2142, the resolution 2174 of the assigned current power for stream 2116 is set to an estimate steady state values, as determined by the scheduler 2140. After receiving permission message 2142, the AP 2106 sends the assigned current power 2138a for streams 2116 to the AP 2106, equal to enkam 2174 steady state in the message 2142 resolution. When this is done, the AP 2106 may then be allowed to monitor any changes in the state of the system and autonomously determine the assigned current power 2138a for the threads 2116 without additional intervention from the scheduler 2140.

FIG. 22 illustrates another embodiment of a permission message 2242 that is transmitted from scheduler 2240 via LED 2204 to AT 2206. As before, permission message 2242 includes permission 2274 of the assigned current power for one or more threads 2216 of the assigned current power 2138a for threads 2116 in the AT 2206. In addition, the permission message includes a blocking period 2276 for some or all of the permissions 2274 of the assigned current power.

The permission message 2242 also includes a resolution 2278 of the assigned accumulated power for some or all of the threads 2216 in the AP 2206. After receiving the permission message 2142, the AP 2106 sends the assigned accumulated power 2238b for the threads 2116 to the AP 2106, equal to the permissions 2278 of the assigned accumulated power for the respective flows 2216 in message 2342 permission.

23 illustrates a power profile 2380 that may be stored in an AP 2306 in some embodiments. The power profile 2332 can be used to determine the payload value 420 and the packet power level 422, which is transmitted by the AP 2306 to the LED 204.

Power profile 2380 includes a plurality of payload values 2320. The payload values 2320 included in the power profile 2380 are possible payload values 2320 for packets 524 that are transmitted using the AP 2306.

Each payload value 2320 in the power profile 2380 is associated with a power level 2322 for each possible transmission mode. In the illustrated embodiment, each payload value 2320 is associated with a high throughput mode power level 2322a and a low delay mode power level 2322b. The high throughput mode power level 2322a is the power level for the high throughput mode packet 524a with a corresponding payload value 2320. The low latency mode power level 2322b is the power level for the low latency mode packet 524b with a corresponding payload value 2320.

24 illustrates a variety of transmission conditions 2482 that can be stored in the AP 2406. In some embodiments, transmission conditions 2482 affect the selection of payload value 420 and power level 422 for packet 524.

Transmission conditions 2482 include an assigned power condition 2484. Assigned Power Condition 2484 typically refers to ensuring that the AP 2406 does not use more power than it is assigned. More specifically, the assigned power condition 2484 is that the power level 422 of packet 524 does not exceed the total available power 1034 for the AP 2406. Various, exemplary methods for determining the total available power 1034 for the AP 2406 have been discussed above.

Transmission conditions 2482 also include a maximum power condition 2486. Condition 2486 maximum power is that the power level 422 of the packet 524 does not exceed the maximum power level, which is set for the AP 2406.

Transmission conditions 2482 also include data condition 2488. Data condition 2488 typically refers to ensuring that the payload value of packet 524 is not too large in view of the total available power 1034 of the AP 2406, as well as the amount of data that the AP 2406 currently has available for transmission. More specifically, the data condition 2488 is that there is no payload value 2320 in the power profile that corresponds to a lower power level 2322 for the transmission mode of packet 524, and which can carry less (1) amount of data than is currently available for transmission, and (2) the amount of data that corresponds to the total available power for the AP 2406.

The following is a mathematical description of the conditions of 2482 transmission. Assigned power condition 2484 may be expressed as:

TxT2PNominalps, tm - power level 2322 for the value of PS payload and TM transmission mode. F is a set of 418 threads.

Condition 2486 of maximum power can be expressed as:

In some embodiments, the power level 422 of packet 524 is allowed to transition from a first value to a second value at some point in time during transmission of packet 524. In such embodiments, the power level 2322 that is specified in the power profile 2380 includes a pre-transition value and a value after the transition. TxT2PreTransitionps, tm - value before transition for the value of PS payload and TM transmission mode. TxT2PostTransitionps, tm is the value after the transition for the value of PS payload and TM transmission mode. TxT2Pmax is the maximum power level that is defined for the AP 206, and may be a function of the pilot signal strength measured by the AP 206. The pilot signal strength is an indicator of the serving sector pilot power relative to the pilot signal strength of other sectors. In some embodiments, it is equal to the ratio of the pilot power FL of the serving sector to the pilot power of other sectors. It can also be used to control linear increase and decrease, which the AP performs autonomously. It can also be used to control TxT2Pmax in such a way that APs 206, when not located (for example, at the edge of a sector), can limit their maximum transmit powers to prevent unwanted interference in other sectors.

In some embodiments, the data condition 2488 is that there is no payload value 2320 in the power profile 2380, which corresponds to a lower power level 2322 for the transmission mode of packet 524, and which can carry a payload of a value set by:

In equation 11, di, n is the amount of data from stream i that is included in a subpacket that is transmitted during subframe n. The expression T2PConversionTM x PotentialT2Poutflowi, TM is the transmitted data for stream i, i.e. the amount of data that corresponds to the total available power of 1034 for the AP 2406. T2PconversionFactorTM is the conversion coefficient for converting the total available power of 1238 for stream i to the data level.

25 illustrates an example of a method 2500 that an AP 206 can perform to determine a payload value 420 and a power level 422 for a packet 524. Step 2502 includes selecting a payload value 2320 from a power profile 2380. Step 2504 includes identifying a power level 2322 associated with the selected payload value 2320 for the transmission mode of packet 524. For example, if packet 524 is going to be transmitted in high bandwidth mode, then step 2504 includes identifying high bandwidth power level 2322a associated with the selected value 2320 payload. Conversely, if packet 524 is going to be transmitted in a low-latency mode, then step 2504 includes identifying the low-latency mode power level 2322b associated with the selected payload value 2320.

Step 2506 includes determining whether transmission conditions 2482 are satisfied if packet 524 is transmitted with a selected payload value 2320 and a corresponding power level 2322. If it is determined at step 2506 that the transmission conditions 2482 are satisfied, then at step 2508, the selected payload value 2320 and the corresponding power level 2322 are passed to the physical layer 312.

If it is determined in step 2506 that the transmission conditions 2482 are not satisfied, then in step 2510 a different payload value 2320 is selected from the power profile 2380. Then, method 2500 returns to step 2504 and continues, as described above.

The design technique after assigning multiple streams is that the total available power is equal to the sum of the available capacities for each stream in the access terminal. This method works well up to the point in time when the access terminal itself exhausts the transmit power, either due to hardware limitations or due to the restrictions imposed by TxT2Pmax. When the transmit power is limited, additional resolution of conflicts in the allocation of the power of the stream in the access terminal is necessary. As discussed above, in the absence of power limitations, the demand function gu / gd determines the assigned current power of each stream by means of the normal BOA function and the ramp. Now that the AP power is limited, one way to establish the purpose of the flow is to consider the AP power limit as an exact counterpart to the sector power limit. Typically, a sector has a criterion for maximum receive power, which is used to set the BOA, which then leads to the assignment of power to each stream. The idea is that when an AP is power limited, each thread in this AP is set to a power assignment that it would accept if the AP power limit actually corresponded to the received power limit of the sector. This flow power assignment can be determined directly from the gu / gd demand function, either by performing a virtual BOA in the AT or by using other equivalent algorithms. Thus, the priority of the flow in the AP is maintained, and it is consistent with the priority of the flow between the APs. In addition, information beyond the existing gu and gd functions is not required.

Now will be provided the essence of the various features of some or all of the embodiments described in this application. The system takes into account the separation of the destination (T2Pinflow) of the main resource and how this resource is used to assign the packet (including controlling the maximum speed and maximum burst duration).

The purpose of the package may remain autonomous in all cases. To assign the main resource, either a planned or an autonomous appointment is possible. This makes it possible to integrate the planned and autonomous assignments seamlessly, since the package assignment process is the same in both cases, and the main resource can either be updated or not as often as necessary.

The control of the blocking time in the permission message enables precise control of the timing of resource assignments with minimal overhead of signal transmission.

The drive level control in the permission message takes into account the quick introduction of a resource into the stream without affecting its main purpose in time. This is a type of single-use resource contribution.

The scheduler can make an estimate with a 'fixed point' or the corresponding resource assignment for each thread, and then load these values into each thread. This reduces the time it takes for the network to reach its appropriate destination ('rough' destination), and then offline mode quickly reaches its final destination ('exact' destination).

A scheduler can send permissions to a subset of threads and allows others to perform an autonomous assignment. Thus, resource guarantees can be made for certain key streams, and then the remaining streams autonomously 'fill' the remaining bandwidth range accordingly.

The scheduler can implement the 'accompanying' function in which the transmission of the permission message occurs only when the flow does not meet the QoS requirements. Otherwise, the thread is allowed to autonomously establish its own power assignment. Thus, QoS guarantees can be made with minimization of signal transmission and overhead. It should be noted that, in order to achieve the QoS goal for the flow, the accompanying scheduler may allow a power assignment other than a fixed-point solution of autonomous assignments.

SD can specify the form of increasing and decreasing linear functions for each flow, increasing and decreasing. Using the appropriate selection of these linear functions, you can precisely specify any purpose of the main resource for each stream simply using only an autonomous operation using only 1 bit of control information in each sector.

The very fast synchronization applied in the BOAA scheme (updated every time interval and filtered using a small time constant in each AP) provides the possibility of very tight control of the power allocation of each stream and maximizes the overall sector throughput while maintaining stability and coverage .

The control of each maximum power flow is permissible as a function of the allocation of the main power and sector load (TSF). This provides the opportunity to coordinate the time axes of an uneven data flow with an effect on the overall load and sector stability.

Controlling each stream with a maximum transmission duration at a maximum power rate is permissible by using the burst duration coefficient. In connection with maximum power control, it takes into account the management of sector stability and maximum load without central coordination of the autonomous assignment of flows, and takes into account the tuning requirements for specific types of sources.

The destination for the packet data sources is gracefully controlled by the T2Pinflow drive and inertia mechanism, which enables the conversion of the assigned primary power to the incoming packet data sources, while still supporting the main power control. The T2Pinflow filter time constant controls the inertia time during which sudden packet arrivals are allowed and after which T2Pinflow decays to its minimum destination.

The dependence of the linear change of T2Pinflow on the TSFA takes into account the higher dynamics of the linear change in less busy sectors without affecting the final purpose of the main power. Thus, vigorous ramp can be realized when the sector is less busy, while maintaining good stability at high load levels by reducing ramp energy.

T2Pinflow is self-adjusting to the appropriate assignment for a given stream through autonomous operation based on the priority of the stream, data requirements and available power. When the flow is reassigned, the drive level reaches the drive saturation level, the linear increase stops, and T2Pinflow will decay to a level where the drive level is less than the drive saturation level. Then it becomes the appropriate destination for T2Pinflow.

In addition to establishing differences in the QoS for each stream available for autonomous assignment, based on the compilation of an increasing / decreasing linear function, it is also possible to control the assignment of the power of the stream based on the channel conditions by using BOA or BOAps and the dependence of the linear change on the pilot signal intensity. Thus, streams with poor channel conditions can receive less assignment, while reducing interference and improving the overall system capacity, or can receive a full destination, regardless of channel status, which maintains a uniform mode of operation due to system bandwidth. This provides the ability to manage the alignment between fair allocation of resources and the overall well-being of the network.

As far as possible, the power assignment between both APs and APs for each stream is location independent. This means that it does not matter that other threads are in the same AP or in other APs, the purpose of the flow depends only on the full load of the sector. Some physical facts limit the extent to which this goal can be achieved, in particular, the maximum transmission power of APs and questions about the merging of high throughput and low latency streams.

Adhering to this approach, the total power available for assigning the AP packet is equal to the sum of the powers available for each stream in the AP, depending on the limitation of the transmit power of the AP.

Whichever rule is used to determine the purpose of the data from each stream included in the destination of the packet, an accurate account of the use of the resource of the stream is kept in terms of flow from the drive. Thus, the fair distribution of resources between flows is guaranteed for any data assignment rule.

When the AP is limited in power and cannot provide the aggregate power available for all its flows, then the power from each stream corresponding to the lower power available in the AP is used. That is, the flows in the APs maintain the corresponding priority relative to each other as if they shared the sector only with these APs and this maximum power level (the power limitation of the APs is analogous to the power limit of the sector as a whole). The power remaining in the sector, not used by the AP with limited power, is then, as usual, available for other flows in the sector.

High throughput streams can be combined into low latency transmissions when the sum of the use of potential high throughput data in one AP is large enough so that the combination does not lead to a large power difference between packets. This maintains the uniformity of the transmitted power corresponding to the inherent interference system. High throughput streams can be combined into low latency transmissions, when a particular high throughput stream has delay requirements such that it cannot wait for all low latency streams in the same AP for transmission, then after reaching the potential data utilization threshold, the stream can combine its data in the transmission of low latency. Therefore, the delay requirements for high throughput streams can be met by sharing APs with constant low delay streams. High throughput streams can be combined in low latency transmission when the sector is lightly loaded, and the loss of efficiency when sending high throughput streams in the form of low latency streams is not important and, therefore, combining can always be acceptable.

Many high throughput streams may be transmitted in low latency mode even if there are no active low latency streams in the case where the packet size for the high throughput mode is at least equal in size to the payload threshold. This enables high throughput mode streams to achieve the highest performance when their assigned power is large enough, since the highest performance for APs occurs with the largest packet size and low latency transmission mode. In other words, the maximum transmission rate for the high-throughput mode is much lower than the maximum transmission rate of the low-latency mode, so the high-throughput mode stream is allowed to use low-latency transmission when it is required to achieve the highest performance.

Each stream has a parameter T2Pmax, which limits its assigned maximum power. It may also be desirable to limit the aggregate transmit power of the AP, possibly depending on its location in the network (for example, when the AP creates additional interference at the boundary of two sectors and affects stability). The T2Pmax parameter can be compiled as a function of pilot power, and limits the maximum transmit power of the AP.

26 is a functional diagram illustrating an embodiment of an AP 2606. The AP 2606 includes a processor 2602 that controls the operation of the AP 2606. The processor 2602 may also be referred to as a CPU, a CPU. A memory 2604, which may include both read-only memory (ROM, ROM) and random access memory (RAM, RAM), provides instructions and data to a processor 2602. A portion of memory 2604 may also include non-volatile random access memory ( NVRAM, ENOZU).

The AP 2606, which may be implemented in a wireless communication device, such as a cell phone, may also include a housing 2607 that includes a transmitter 2608 and a receiver 2610 to allow transmission and reception of data, such as audio transmissions, between the AP 2606 and the remote location, such as LED 204. Transmitter 2608 and receiver 2610 can be combined into transceiver 2612. Antenna 2614 is attached to the housing 2607 and electrically connected to transceiver 2612. An additional antenna (not shown) can also be used. ene). The operation of the transmitter 2608, receiver 2610 and antenna 2614 is well known in the art and does not require a description in this application.

The AP 2606 also includes a signal detector 2616, used to detect and quantify the level of signals received by the transceiver 2612. The signal detector 2616 detects signals such as total energy, chip energy from the pilot signal by pseudo noise (PN, PN), power spectral density and other signals, as is known in the art.

The state change device 2626 of the AP 2606 controls the state of the AP 2606 of the wireless communication device based on the current state and additional signals received by the transceiver 2612 and detected by the signal detector 2616. A wireless communications device may operate in any of a number of conditions.

The AP 2606 also includes a system identifier 2628 used to control the wireless communication device and determine which service provider system the wireless communication device should go to when it determines that the current service provider system is unsatisfactory.

The various components of the AP 2606 are connected together using a bus system 2630, which may include a power bus, a control signal bus, and a status signal bus in addition to the data bus. However, for clarity, various tires are illustrated in FIG. 26 as a bus system 2630. The AP 2606 may also include a Digital Signal Processor (DSP) 2609 for use in signal processing. One skilled in the art will understand that the TD 2606 illustrated in FIG. 26 is a functional diagram and not an enumeration of specific components.

Those skilled in the art will understand that information and signals may be represented using any of a variety of different technologies and methods. For example, data, commands, information, signals, bits, symbols and chips that can be mentioned throughout the description above can be represented using voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any their combinations.

Those skilled in the art will also appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or a combination of the two. . To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps are described above in general terms in terms of their functions. The implementation of these functions in the form of hardware or software depends on the specific application and development restrictions imposed on the entire system. Skilled artisans may implement the described functions in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The various illustrative logical blocks, modules, and circuits described in connection with the embodiments disclosed herein may be implemented or implemented using a universal processor, a digital signal processor DSP, a specialized integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, is intended nnyh to perform the functions described herein. A universal processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be implemented directly on hardware, in a software module executed by a processor, or in a combination of the two. The software module can be located in RAM memory, flash memory, ROM memory, EPROM memory (electrically programmable ROM), EEPROM memory (electrically erasable programmable ROM), in registers, on a hard disk, on a removable disk, a CD-ROM or any other as a storage medium known in the art. An exemplary storage medium is connected to the processor so that the processor can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium may be combined with a processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside as a discrete component in a user terminal.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications in these embodiments will be apparent to those skilled in the art, and the basic principles defined herein may be applied to other embodiments without departing from the spirit and scope of the invention. Therefore, it is not intended that the present invention be limited by the embodiments presented in this application, but rather should be within the broadest possible scope consistent with the principles and new features disclosed in this application.

Claims (13)

1. An access terminal that is configured for wireless communication with an access network in a sector, comprising:
a transceiver for transmitting a signal of the reverse data stream to the access network and receiving data from the access network,
an antenna electrically connected to the transceiver and designed to receive signals from the access network,
a processor controlling the operation of the access terminal,
a memory electrically connected to the processor, and
moreover, the processor, when accessing the memory, executes instructions stored in memory that implement the steps in which:
evaluate the current value of the bits of the inverse activity transmitted using the access network,
if the estimated current value of the inverse activity bit indicates that the sector is busy, the assigned current power for each stream from the plurality of flows in the access terminal is reduced, and the reduction value for a particular stream is determined in accordance with a linearly decreasing function that is intended for the stream, and linearly the decreasing function is a function of the assigned current power for the stream, and,
if the estimated current value of the inverse activity bit indicates that the sector is free, the assigned current power for each stream from a plurality of streams in the access terminal is increased, and the magnitude of the increase for a particular stream is determined in accordance with a linearly increasing function that is intended for the stream, and linearly an increasing function is a function of the assigned current power for the flow. 2. The access terminal according to claim 1, wherein the step of evaluating the current value of the inverse activity bit is performed once in each time interval. 3. The access terminal according to claim 2, wherein the step of evaluating the current value of the reverse activity bit comprises a sub-step in which the signal received from the access network is filtered using a filter having an adjustable time constant. 4. The access terminal according to claim 1, in which the method further comprises the steps of:
assess the level of sector load and
determining the assigned maximum power for each stream from a plurality of streams, the assigned maximum power for a particular stream being a function of the assigned current power for the stream and estimating the sector load level. 5. The access terminal according to claim 1, in which the method further comprises the steps in which for each stream:
determine the assigned stored power for the stream,
using the assigned current power for the stream and the assigned accumulated power for the stream to determine the total available power for the stream and
use the total available power for the stream to determine the power level for the packet that is transmitted to the access network. 6. The access terminal according to claim 5, in which the assigned accumulated power for the stream is limited by the saturation level, the saturation level being a settable coefficient that is higher than the assigned maximum power. 7. The access terminal according to claim 1, in which both the linearly decreasing function and the linearly increasing function depend on the estimation of the sector load level. 8. The access terminal according to claim 1, wherein both the linearly decreasing function and the linearly increasing function depend on the pilot power measured by the access terminal. 9. The access terminal according to claim 1, in which the assigned current power is determined in accordance with

where T2PInflow is the assigned current power for stream i in subframe n, T2PfilterTC is the filter time constant, and if the assigned current power is increased, ΔT2PInflow is expressed as

moreover, if the assigned current power is reduced, Δ T2PInflow is expressed as

where T2PUpi is a linearly increasing function for stream i, where T2PDni is a linearly decreasing function for stream i, PilotStrength is an indicator of the power of the pilot signal of the serving sector relative to the power of the pilot signals of other sectors. 10. An access terminal that is configured for wireless communication with an access network in a sector, comprising
means for estimating the current value of the reverse activity bit transmitted by the access network,
means for decreasing the assigned current power for each stream from a plurality of streams in the access terminal if the estimated current value of the reverse activity bit indicates that the sector is busy, and the reduction value for a particular stream is determined in accordance with a linearly decreasing function that is intended for the stream, wherein the linearly decreasing function is a function of the assigned current power for the flow, and
means for increasing the assigned current power for each stream from a plurality of streams in the access terminal, if the estimated current value of the reverse activity bit indicates that the sector is free, and the magnitude of the increase for a particular stream is determined in accordance with a linearly increasing function that is intended for the stream, wherein the ramp function is a function of the assigned current power for the flow. 11. The access terminal of claim 10, further comprising means for estimating a sector load level and means for determining an assigned maximum power for each stream from a plurality of streams, the assigned maximum power for a particular stream being a function of the assigned current power for the stream and estimating a sector load level . 12. The access terminal of claim 10, further comprising for each stream
means for determining the assigned stored power for the stream,
means for using the assigned current power for the stream and the assigned accumulated power for the stream to determine the total available power for the stream and
means for using the total available power for the stream to determine the power level for the packet that is transmitted to the access network. 13. A method for controlling transmit power in an access terminal that is configured for wireless communication with an access network in a sector, comprising the steps of:
evaluate the current value of the bits of the inverse activity transmitted using the access network,
if the estimated current value of the inverse activity bit indicates that the sector is busy, the assigned current power for each stream from the plurality of flows in the access terminal is reduced, and the reduction value for a particular stream is determined in accordance with a linearly decreasing function that is intended for the stream, and linearly the decreasing function is a function of the assigned current power for the stream, and,
if the estimated current value of the inverse activity bit indicates that the sector is free, the assigned current power for each stream from a plurality of streams in the access terminal is increased, and the magnitude of the increase for a particular stream is determined in accordance with a linearly increasing function that is intended for the stream, and linearly an increasing function is a function of the assigned current power for the flow.

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