CN1843001B - Transmit power control method and corresponding wireless access terminal based on reverse activation bit and data flow specific up/down ramp function - Google Patents

Abstract

The present invention provides an access terminal (206) configured to wirelessly communicate with an access network (204) within a sector (1032). The access terminal (206) includes a transmitter (2608) for transmitting a reverse traffic channel to the access network (204), an antenna (2614) for receiving signals from the access network (204), a processor (2602), and a memory (2604) in electronic communication with the processor (2602). Instructions are stored in the memory (2604). The instructions are configured to estimate a current value of a reverse activation bit (1444) transmitted by the access network (204). Per-stream power allocation can be decreased or increased based on the estimated current value of the reverse activation bit.

Description

Transmit power control method and corresponding wireless access terminal based on reverse activation bit and data flow specific up/down ramp function

Claim priority under Section 119 of U.S. Section 35

This application claims Serial No. 60/487,648, filed July 15, 2003, entitled "Reverse Link Differentiated Services for a Multiflow Communication System Using Autonomous Allocation" and The priority of the provisional application assigned to its assignee is hereby expressly incorporated herein by reference. the

This patent application also claims Serial No. 60/493,782, filed August 6, 2003, entitled "Cooperative Autonomous And Scheduled Resource Allocation For A Distributed Communication System" and assigned to its recipient Priority is given to the provisional application of the grantee and is hereby expressly incorporated herein by reference. the

This patent application also claims Serial No. 60/527,081, filed December 3, 2003, entitled "Multiflow Reverse Link MAC for a Communication System" and assigned to its assignee priority of the provisional application of , and is hereby expressly incorporated herein by reference. the

technical field

The present invention relates generally to wireless communication systems and, more particularly, to improvements in the operation of a Medium Access Control (MAC) layer of an access terminal in a wireless communication system. the

Background technique

Communication systems have been developed to allow information signals to be transmitted from an originating station to physically distinct destination stations. In transmitting an information signal from an originating station over a communication channel, the information signal is first transformed into a form suitable for efficient transmission over the communication channel. Transformation or modulation of an information signal involves varying the parameters of a carrier in response to the information signal in such a way that the spectrum of the resulting modulated carrier is confined within the bandwidth of the communication channel. At the destination station, the original information signal is reconstructed from the modulated carrier wave received on the communication channel. This reconstruction is usually achieved by the originating station by using the inverse of the modulation process. the

Modulation also makes use of multiple access, ie simultaneous transmission and/or reception, of several signals on a common communication channel. Multiple access communication systems typically include multiple remote subscriber units that require intermittent service for a shorter duration than would be required for continuous access to a common communication channel. There are several multiple access techniques known in the art, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), and Amplitude Modulation Multiple Access (AM). the

A multiple-access communication system can be wireless or wired and can transmit voice and/or data. In a multiple access communication system, communication between users is performed through one or more base stations. A first user at one subscriber station communicates with a second user at a second subscriber station by transmitting data on a reverse link to the base station. A base station receives the data and can pass that data on to another base station. The data is transmitted to the second subscriber station on a forward channel of the same base station or another base station. The forward channel refers to transmissions from the base station to the subscriber stations, and the reverse channel refers to transmissions from the subscriber stations to the base station. Likewise, communication may be between a first user at a mobile subscriber station and a second user at a landline station. The base station receives the data from the user on the reverse channel and routes the data to the second user over the public switched telephone network (PSTN). In many communication systems, eg IS-95, W-CDMA, IS-2000, separate frequencies are assigned to the forward and reverse channels. the

One example of a data optimized communication system is a High Data Rate (HDR) communication system. In HDR communication systems, a base station is sometimes referred to as an access network (AN), and a remote station is sometimes referred to as an access terminal (AT). The functions performed by the AT can be systematized into many layers, including the MAC layer. The MAC layer provides certain services to higher layers, including services regarding backchannel operation. The benefits can be realized by making improvements to the operation of the MAC layer of an AT in a wireless communication system. the

Contents of the invention

Disclosed herein is an access terminal configured for wireless communication with an access network within a sector. The access terminal includes a transmitter for transmitting reverse traffic channels to the access network, an antenna for receiving signals from the access network, a processor, and memory in electronic communication with the processor. Instructions are stored in memory. The instructions are executable to implement a method for estimating a current value of a reverse activation bit transmitted by an access network. the

The method also involves reducing a current power allocation for each of the plurality of streams at the access terminal if the estimated current value of the reverse activation bit indicates that the sector is busy. The magnitude of the reduction for a particular flow can be determined according to the downward ramping function designed for that flow. The ramp down function may be a function of the stream's current power allocation. the

The method also involves increasing a current power allocation for each of the plurality of streams on the access terminal if the estimated current value of the reverse active bit indicates that the sector is idle. The magnitude of the increase for a particular flow can be determined according to the upward ramping function designed for that flow. The ramp up function may be a function of the stream's current power allocation. the

In some embodiments, estimating the current value of the reverse activation bit may be performed once per slot. The estimating may include filtering the signal received from the access network with a filter having an adjustable time constant. the

The method may additionally include estimating a load level of the sector, and determining a peak power allocation for each of the plurality of streams. The peak power allocation for a particular flow may be a function of the current power allocation for that flow and an estimate of the load level for that sector. the

In some embodiments, the method additionally includes, for each flow, determining a cumulative power allocation for that flow. The flow's current power allocation and the flow's cumulative power allocation can be used to determine the total available power for the flow. The total available power of this flow can be used to determine the power level of packets transmitted to the access network. In some embodiments, a saturation level may be used to limit the cumulative power allocation of a flow. The saturation level may be a settable factor above the peak power allocation. the

Both the down-ramp function and the up-ramp function may depend on an estimate of the sector's load level. Alternatively, or in addition, both the down-ramp and up-ramp functions may depend on access terminal measured pilot strengths. the

Also disclosed herein is another embodiment of an access terminal configured to communicate wirelessly with an access network within a sector. The access terminal includes means for estimating a current value of a reverse activation bit transmitted by the access network. the

The access terminal also includes means for reducing a current power allocation for each of the plurality of streams on the access terminal if the estimated current value of the reverse activation bit indicates that the sector is busy. The magnitude of the reduction for a particular flow can be determined from the ramp down function designed for that flow. The ramp down function may be a function of the stream's current power allocation. the

The access terminal also includes means for increasing a current power allocation for each of the plurality of streams on the access terminal if the estimated current value of the reverse active bit indicates that the sector is idle. The magnitude of the increase for a particular flow can be determined from the ramp-up function designed for that flow. The ramp up function may be a function of the stream's current power allocation. the

The access terminal may also include means for estimating a load level of a sector. The access terminal can also include means for determining a peak power allocation for each of the plurality of streams. The peak power allocation for a particular stream may be a function of the current power allocation for that stream and an estimate of the sector's load level. the

The access terminal may also include, for each flow, means for determining a cumulative power allocation for the flow, and means for determining a total available power for the flow using the current power allocation for the flow and the cumulative power allocation for the flow device. The access terminal may also include means for utilizing the total available power of the flow to determine a power level for packets transmitted to the access network. the

Description of drawings

Figure 1 shows an example of a communication system that supports many users and can implement at least some aspects of the embodiments discussed herein;

Figure 2 shows a block diagram of an access network and an access terminal in a high data rate communication system;

Figure 3 shows a block diagram of a number of layers on an access terminal;

Figure 4 shows a block diagram of exemplary interactions between higher layers, a media access control layer, and a physical layer on an access terminal;

Figure 5A shows a block diagram of a high capacity packet being transmitted to an access network;

Figure 5B shows a block diagram of a low-latency packet being transmitted to an access network;

Figure 6 shows a block diagram of different types of flows that may exist on an access network;

Figure 7 shows a block diagram of an exemplary flow set of high capacity packets;

Figure 8 shows a block diagram of an exemplary flow set of low-latency packets;

9 illustrates a block diagram of information that may be maintained on an access terminal to determine whether a high-capacity flow is included in a flow set of low-latency packets;

Figure 10 shows a block diagram of an access network and multiple access terminals within a sector;

Figure 11 illustrates an exemplary mechanism that may be used to determine total available power for an access terminal;

Figure 12 illustrates an embodiment wherein at least some of the access terminals within a sector include multiple streams;

Figure 13 illustrates one method by which an access terminal may obtain the current power allocated to a flow on the access terminal;

Figure 14 illustrates reverse activation bits transmitted from an access network to access terminals within a sector;

15 illustrates information that may be maintained on an access terminal to determine current power allocated to one or more streams on the access terminal;

16 illustrates a functional block diagram of exemplary functional components in an access terminal that may be used to determine an estimate of the reverse activation bit and an estimate of the current load level for the sector;

17 shows a flowchart of an exemplary method for determining current power allocated to a flow on an access terminal;

Figure 18 shows a block diagram of an access terminal sending a request message to a scheduler on an access network;

19 illustrates a block diagram of information that may be maintained on an access terminal for the access terminal to determine when to send a request message to the access network;

20 illustrates a block diagram of exemplary interactions between a scheduler operating on an access network and access terminals within a sector;

Figure 21 shows a block diagram of another exemplary interaction between a scheduler operating on an access network and an access terminal;

Figure 22 shows a block diagram of another embodiment of a grant message transmitted from a scheduler on an access network to an access terminal;

Figure 23 shows a block diagram of a power profile that may be stored on an access terminal;

Figure 24 shows a block diagram of a number of transmission conditions that may be stored on an access terminal;

25 illustrates a flow diagram of an exemplary method an access terminal may perform to determine a packet's payload size and power level; and

Figure 26 shows a functional block diagram of one embodiment of an access terminal. the

Detailed ways

The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be considered preferred or advantageous over other embodiments. the

It is noted that the exemplary embodiments provided throughout this discussion are by way of example; however, alternative embodiments may combine different aspects without departing from the scope of the present invention. In particular, the present invention is applicable to data processing systems, wireless communication systems, mobile IP networks and any other system that needs to receive and process wireless signals. the

The exemplary embodiment employs a spread spectrum wireless communication system. Wireless communication systems are widely used to provide different types of communication, such as voice, data, and so on. These systems may be CDMA, TDMA, or some other modulation technique. A CDMA system offers certain advantages over other types of systems, including increased system capacity. the

Wireless communication systems may be designed to support one or more standards, such as the "TIA/EIA/IS-95-B Mobile Station-Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular Systems" referred to herein as the IS-95 standard, In a series of documents including documents 3GPP TS 25.211, 3GPP TS 25.212, 3GPP TS 25.213 and 3GPP TS 25.214, 3GPP TS 25.302, provided by a consortium named "3rd Generation Partnership Project" referred to herein as 3GPP The implemented standards, referred to herein as the W-CDMA standard, provided by a consortium named "3rd Generation Partnership Project 2," referred to herein as 3GPP2, and TR-45.5, referred to herein as the cdma2000 standard, Formally known as the IS-2000MC. These standards cited above are hereby expressly incorporated herein by reference. the

The systems and methods described herein may be used with HDR communication systems. HDR communication systems may be specified as conforming to one or more standards, such as "cdma2000 High-Rate Packet Data Air Interface Specification," 3GPP2C.S0024-A, March 2004, First Edition, established by "3rd Generation Partnership Project 2 "The association announced. The contents of the aforementioned standards are incorporated herein by reference. the

An HDR subscriber station, which may be referred to herein as an AT, may be mobile or stationary, and may communicate with one or more HDR base stations, which may be referred to herein as a modem pool transceiver (MPT). Access terminals transmit and receive data packets through one or more modem pool transceivers to an HDR base station controller, which may be referred to herein as a modem pool controller (MPC). Modem pool transceivers and modem pool controllers are part of a network called an access network. The access network transports data packets between multiple access terminals. The access network may be further connected to additional networks outside the access network, such as a corporate intranet or the Internet, and data packets may be communicated between each access terminal and such an external network. An access terminal that has established an active traffic channel connection with one or more modem pool transceivers is called an active access terminal and is considered to be in traffic. An access terminal that is in the process of establishing an active traffic channel connection with one or more modem pool transceivers is considered to be in a connection establishment state. An access terminal may be any data device that communicates through a wireless channel or through a wired channel (eg, using fiber optic or coaxial cables). access terminal

The endpoint can also be any of many types of devices including, but not limited to: PC card, compact flash memory, external or internal modem, or wireless or landline phone. The communication channel through which the access terminal sends signals to the modem pool transceiver is called the reverse channel. The communication channel through which the modem pool transceiver sends signals to the access terminal is called the forward channel. the

Figure 1 illustrates one example of a communication system 100 that supports many users and is capable of implementing at least some aspects of the embodiments discussed herein. Any of a variety of algorithms and methods may be used to schedule transmissions in system 100 . System 100 provides communications for a number of cells 102A-102G, each of which is served by a corresponding base station 104A-104G, respectively. In the exemplary embodiment, some of the base stations 104 have multiple receive antennas, while other base stations have only one receive antenna. Similarly, some of the base stations 104 have multiple transmit antennas, while others have only a single transmit antenna. There are no restrictions on the combination of transmit and receive antennas. Accordingly, base station 104 may have multiple transmit antennas and a single receive antenna, or multiple receive antennas and a single transmit antenna, or both single or both multiple transmit and receive antennas. the

The remote stations 106 within the coverage area may be fixed (ie, stationary) or mobile. As shown in FIG. 1, various remote stations 106 are dispersed throughout the system. Based on, for example, whether soft handoff is employed or whether the terminal is designed or operated to receive (parallel or sequentially) multiple transmissions from multiple base stations, each remote station 106 at any given time communicates with at least one and possibly more base stations 104 on the channel. Soft handoff in a CDMA communication system is well known in the art and is described in U.S. Patent No. 5,101,501, entitled "Method and System for Providing Soft Handoff in a CDMA Cellular Telephone System" It is described in detail in "Providing a Soft Handoff in Communications in a CDMA Cellular Telephone System), which has been assigned to the assignee of the present invention. the

The forward channel refers to transmissions from base station 104 to remote station 106 and the reverse channel refers to transmissions from remote station 106 to base station 104 . In the exemplary embodiment, some of the remote stations 106 have multiple receive antennas, while other remote stations have only one receive antenna. In FIG. 1, base station 104A transmits data on a forward channel to remote stations 106A and 106J, base station 104B transmits data to remote stations 106B and 106J, base station 104C transmits data to remote station 106C, and so on. the

In an HDR communication system, base stations are sometimes called ANs, and remote stations are sometimes called ATs. FIG. 2 shows an AN 204 and an AT 206 in an HDR communication system. the

AT 206 communicates wirelessly with AN 204. As previously mentioned, the reverse channel refers to transmissions from the AT 206 to the AN 204. The reverse traffic channel 208 is shown in FIG. 2 . The reverse traffic channel 208 is the component of the reverse channel that carries information from a particular AT 206 to the AN 204. Of course, the reverse channel may include other channels besides the reverse traffic channel 208 . Likewise, the forward channel may include a plurality of channels including a pilot channel. the

The functions performed by At 206 can be systematized into many layers. Figure 3 shows the many layers on the AT 306. Among these layers is the MAC layer 308 . Higher layers 310 sit above MAC layer 308 . MAC layer 308 provides certain services to higher layers 310 , including services related to the operation of reverse traffic channel 208 . The MAC layer 308 includes an implementation of the RTC MAC protocol 314. The RTC MAC protocol 314 provides for the subsequent AT 306 to transmit the reverse traffic channel 208 and the reverse traffic channel 208 to be received by the AN 204. the

Physical layer 312 is located below MAC layer 308 . The MAC layer 308 requests certain services from the physical layer 312 . These services are related to the physical transport of packets to the AN 204. the

FIG. 4 illustrates exemplary interactions between higher layers 410, MAC layer 408, and physical layer 412 on AT 406. As shown, MAC layer 408 receives one or more flows 416 from higher layers 410 . 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), gaming, and the like. the

Data from stream 416 on AT 406 is transmitted to AN 204 in packets. According to the RTCMAC protocol 414, the MAC layer determines a flow set 418 for each packet. Sometimes multiple streams 416 on the AT 406 will transmit data simultaneously. A packet may include data from more than one flow 416 . However, sometimes there may be one or more streams 416 on the AT 406 to transmit data, but it is not included in the packet. The packetized flow set 418 represents the flows 416 on the AT 406 that were not included in the packet. Exemplary methods for determining the set of packet flows 418 will be described later. the

The MAC layer 408 also determines the payload size 420 for each packet. The payload size 420 of the packet indicates how much data from the set of flows 418 is contained in the packet. the

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

For each packet to be transmitted to AN 204, MAC layer 408 communicates to physical layer 412 the set of flows 418 to be included in the packet, the packet's payload size 420, and the packet's power level 422. Next, the physical layer 412 implements packet transmission to the AN 204 according to the information provided by the MAC layer 308. the

5A and 5B illustrate packet 524 transmitted from AT 506 to AN 504 . Packets 524 may be transmitted in one of several possible transmission modes. For example, in some embodiments, there are two possible transfer modes, a high capacity transfer mode and a low latency transfer mode. FIG. 5A shows high capacity packets 524a transmitted to AN 504 (ie, packets 524 transmitted in high capacity mode). FIG. 5B shows low latency packet 524b transmitted to AN 504 (ie, packet 524b transmitted with low latency). the

Low latency packets 524b are transmitted at a higher power level 422 than high capacity packets 524a of the same packet size. Therefore, low-latency packets 524b will arrive at AN 504 more quickly than high-volume packets 524a. However, low-latency packets 524b cause more load on the system 100 than high-volume packets 524a. the

FIG. 6 shows the different types of streams 616 that exist on the AT 606 . In some embodiments, each stream 616 on AT 606 is associated with a particular transmission mode. Where the possible transfer modes are high-volume transfer mode and low-latency transfer mode, AT 606 may include one or more high-capacity streams 616a and/or one or more low-latency streams 616b. For high-capacity stream 616a, it is preferred to transmit in high-capacity packets 524a. It is preferred for low latency stream 616b to be transmitted in low latency packets 524b. the

FIG. 7 shows an exemplary flow set 718 of high capacity packets 724a. In some embodiments, if all flows 716 that have data to transmit are high-capacity flows 716a, then packet 724a is transmitted in high-capacity mode. Thus, in such an embodiment, flow set 718 in high-capacity packet 724a includes only high-capacity flow 716a. Alternatively, the low-latency stream 616b may be included in the high-capacity packet 724a, which is handled by the AT 606 itself. One exemplary reason to do this is that there is not enough throughput for low latency stream 616b at that time. For example, it may be detected that a sequence of low latency streams 616b is being established. The stream can increase its throughput at the cost of increased latency by using high capacity mode instead. the

FIG. 8 shows an exemplary flow set 818 of low-latency packets 824b. In some embodiments, if there is at least one low-latency stream 816b with data to transmit, the packet 824b is transmitted in low-latency mode. Flow set 818 in low-latency grouping 824b includes each low-latency flow 816b that has data to transmit. In stream set 818, one or more high capacity streams 816a may also be included with data to be transferred. However, in the stream set 818, one or more high volume streams 816a that have data to be transmitted may not be included. the

FIG. 9 shows information maintained on AT 906 to determine whether high volume flow 916a is included in flow set 818 of low latency packet 824b. Each high capacity flow 916a on the AT 906 has an amount of data 926 available for transmission. Likewise, a merge threshold 928 may be defined for each high volume flow 916a on the AT 906. Additionally, a merge threshold 930 for the AT 906 may be defined in general. Finally, merging of high-capacity flows may occur when an estimate of a sector's load level is less than a threshold. (How to determine an estimate of a sector's load level will be described later.) That is, when the sector load is sufficiently low, the combined efficiency loss is insignificant and active use is permitted. the

In some embodiments, high capacity flow 916a is included in low latency packet 524b if either of two conditions are met. The first condition is that, for all high volume streams 916a on the AT 906, the total amount of transferable data 926 exceeds the merge threshold 930 defined for the AT 906. The second condition is that, for the high volume flow 916a, the transferable data 926 exceeds the merge threshold 928 defined for the high volume flow 916a. the

The first condition involves power switching from low latency packet 824b to high capacity packet 724a. If no high-capacity flow 916a is included in the low-latency packet 824b, the data from the high-capacity flow 916a is incremented as long as there is data available for transmission from at least one low-latency flow 816b. If too much data from the high-volume stream 916a is allowed to accumulate, the next time the high-volume packet 724a is transmitted, there may be an unacceptably sharp power jump from the last low-latency packet 824b to the high-capacity packet 724a . Thus, according to the first condition, once the amount of transmittable data 926 from high-volume stream 916a on AT 906 exceeds a certain value (defined by pooling threshold 930), data from high-volume stream 916a is allowed to "coalesce" to low Wait Time Packet 824b. the

The second condition concerns the quality of service (QoS) requirements of the high volume flow 916a on the AT 906. If the merge threshold 928 for the high volume flow 916a is set to a large value, this indicates that the high volume flow 916a is rarely, if ever, contained in the low latency packet 824b. Therefore, such a high-volume stream 916a may experience a transmission delay because it will not be delivered as long as there is at least one low-latency stream 816b with data to deliver. Conversely, if the merge threshold 928 for the high-volume flow 916a is set to a small value, this indicates that the high-volume flow 916a is almost always contained in the low-latency packet 824b. Therefore, such a high-capacity stream 916a is less likely to experience transmission delays. However, such high capacity streams 916a consume more sector resources to transmit their data. the

Advantageously, in some embodiments, the merge threshold 928 for some high volume streams 916a on the AT 906 can be set to a large value, while some other high volume streams 916a on the AT 906 can be set to a small merge Threshold 928. This design is advantageous because some types of high volume flows 916a may have strict QOS requirements while others do not. One example of a stream 916a that has strict QOS requirements and can be delivered in high capacity mode is real-time video. Real-time video has high bandwidth requirements, which makes transmission in low-latency mode less efficient. However, live video does not expect any transmission delay. One example of a flow 916 that does not have strict QOS requirements and can be delivered in high capacity mode is a best effort flow 916 . the

FIG. 10 shows an AN 1004 and a plurality of ATs 1006 within a sector 1032. A sector 1032 is a geographic area within which signals from the AN 1004 can be received by the AT 1006, and vice versa. the

It is a property of some wireless communication systems, such as CDM systems, that transmissions interfere with each other. Therefore, to ensure that there is not too much interference between ATs 1006 within the same sector 1032, the amount of power received by ATs 1006 on the AN 1004 is generally limited. To ensure AT

1006 Within this limit, each AT 1006 within the sector 1032 may use a certain amount of power 1034 for transmission on the reverse traffic channel 208. Each AT 1006 sets the power level 422 of the packets 524 it transmits on the reverse traffic channel 208 so as not to exceed its total available power 1034. the

The power level 1034 allocated to the AT 1006 may not be exactly equal to the power level 422 used by the AT 1006 to transmit the packet 524 on the reverse traffic channel 208. For example, in some embodiments, there is a discrete set of power levels that the AT 1006 selects from the process of determining the power level 422 of the packet 524. The total available power 1034 of the AT 1006 may not exactly equal any of these discrete power levels. the

The total available power not used at any given moment is allowed to accumulate 1034 in order to use it at a later moment. Thus, in such an embodiment, the total available power 1034 of the AT 1006 is (roughly) equal to the current power allocation 1034a plus at least some portion of the accumulated power allocation 1034b. The AT 1006 determines the power level 422 of the packet 524 such that it does not exceed the total available power 1034 of the AT 1006. the

The total available power 1034 of the AT 1006 may not always be equal to the current power allocation 1034a of the AT 1006 plus the cumulative power allocation 1034b of the AT 1006. In some embodiments, a peak allocation 1034c may be used to limit the total available power 1034 of the AT 1006. The peak allocation 1034c of the AT 1006 may be equal to the current power allocation 1034a of the AT 1006 multiplied by some limiting factor. For example, if the limiting factor is 2, then the AT 1006's peak allocation 1034c is equal to twice its current power allocation 1034a. In some embodiments, the limiting factor is a function of the current power allocation 1034a of the AT 1006. the

The hypothetical AT's peak allocation 1034c may limit how "bursty" the AT's 1006 transmissions are allowed. For example, during a certain period, the AT 1006 may have no data to transmit. During this period, power may continue to be allocated to the AT 1006. Since there is no data to transmit, the allocated power is accumulated. At some point, the AT 1006 may suddenly have a relatively large amount of data to transmit. At this point in time, the accumulated power allocation 1034b may be quite large. If the AT 1006 is allowed to use the entire accumulated power allocation 1034b, there may be a sudden, rapid increase in the transmit power 422 of the AT 1006. However, if the transmit power 422 of the AT 1006 is increased too quickly, the stability of the system 100 may be affected. So, in a situation like this, the AT 1006 can be provided with a peak allocation 1034c to limit the total available power 1034 of the AT 1006. Note that the cumulative power allocation 1034b is still available, but while the peak allocation 1034c is limited, its use is extended over more packets. the

FIG. 11 illustrates an exemplary mechanism that may be used to determine the total available power 1034 of the AT 206. This mechanism involves the use of virtual "buckets" 1136 . At periodic time intervals, new current power allocations 1034a are added to buckets 1136 . Also at periodic time intervals, the power level 422 of the packet 524 transmitted by the AT 206 exits the bucket 1136. The amount by which the current power allocation 1034a exceeds the packet's power level 422 is the accumulated power allocation 1034b. The accumulated power allocation 1034b remains in bucket 1136 until it is used. the

The total available power 1034 minus the current power allocation 1034a yields the total potential drawn from the bucket 1136 . The AT 1006 ensures that the power level 422 of the packets 524 it transmits does not exceed the total available power 1034 of the AT 1006. As previously mentioned, under certain conditions, the total available power 1034 is less than the sum of the current power allocation 1034a and the accumulated power allocation 1034b. For example, peak power allocation 1034c may be used to limit total available power 1034 . the

The accumulated power allocation 1034b may be limited by a saturation level 1135 . In some embodiments, the saturation level 1135 is a function of the amount of time the AT 1006 is allowed to use its peak power allocation 1034c. the

FIG. 12 illustrates one embodiment in which at least some of the AT 1206 and the AN 1204 within a sector 1232 include a plurality of streams 1216. In such an embodiment, a separate amount of available power 1238 may be determined for each flow 1216 on the AT 2006. The available power 1238 for the stream 1216 on the AT 1206 may be determined according to the methods described above in connection with FIGS. 10-11. More specifically, total available power 1238 for stream 1216 may include current power allocation 1238a for stream 1216 , plus at least some portion of cumulative power allocation 1238b for stream 1216 . Additionally, the total available power 1238 of the stream 1216 may be limited with the peak allocation 1238c of the stream 1216 . A separate bucket mechanism may be maintained for each flow 1216 , as shown in FIG. 11 , to facilitate determining the total available power 1238 for each flow 1216 . The total available power 1234 of the AT 1206 may be determined by summing the total available power 1238 of the different streams 1216 on the AT 1206. the

A mathematical description of the various formulas and algorithms that may be used in determining the total available power 1238 for the stream 1216 on the AT 1206 is provided below. In the equation described below, the total available power 1238 for each stream i on the AT 1206 is determined once per subframe. (In some embodiments, one subframe equals four slots, and one slot equals 5/3ms.) In the equation, express the total available power 1238 of the flow as PotentialT2POutflow. the

The total available power 1238 for flow i delivered in the high capacity packet 524a can be expressed as:

${\mathrm{<span\; class="notranslate">\; PotentialT</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; POutflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; HC</span>}}<span\; class="notranslate">\; =</span>$

$\mathrm{<span\; class="notranslate">\; max</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; min</span>}\left(\begin{array}{c}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; AllocationStagger</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; r</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span><span\; class="notranslate">\; (</span>\frac{{\mathrm{<span\; class="notranslate">\; Bucket\; Level</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}}{\mathrm{<span\; class="notranslate">\; 4</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PInflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>\\ \mathrm{<span\; class="notranslate">\; BucketFactor</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PInflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; FRAB</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PInflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}\end{array}\right)<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

The total available power 1238 for flow i delivered in the low-latency packet 524b can be expressed as:

${\mathrm{<span\; class="notranslate">\; PotentialT</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; POutflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; LL</span>}}<span\; class="notranslate">\; =</span>$

$\mathrm{<span\; class="notranslate">\; max</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; min</span>}\left(\begin{array}{c}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; AllocationStagger</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; r</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span><span\; class="notranslate">\; (</span>\frac{{\mathrm{<span\; class="notranslate">\; Bucket\; Level</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PInflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>\\ \mathrm{<span\; class="notranslate">\; BucketFactor</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PInflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; FRAB</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PInflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}\end{array}\right)<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

BucketLevel _i,n is the accumulated power allocation 1238b for flow i over subframe n. T2PInflow _i,n is the current power allocation 1238a for flow i on subframe n. The expression BucketFactor(T2PInflow _i,n , FRAB _i,n )×T2PInflow _i,n is the peak power allocation 1238c for flow i on subframe n. BucketFactor(T2PInflow _i,n , FRAB _i,n ) is the function used to determine the limiting factor of the total available power 1238, i.e. the total available power 1238 of flow i on subframe n is allowed to exceed the current power allocation of flow i on subframe n Factor of 1238a. FRAB _i,n is an estimate of the load level of sector 1232 and will be described in more detail below. AllocationStagger is the magnitude of the random term that shakes the allocation level to avoid synchronization problems, and r _n is a uniformly distributed real-valued random number in the range [-1, 1].

The cumulative power allocation 1238b of stream i on subframe n+1 can be expressed as:

BucketLevel _{i, n+1} =

min((BucketLevel _{i, n} + T2PInflow _{i, n} - T2POutflow _{i, n} ), BucketLevelSat _{i, n+1} )(3)

T2POutflow _i,n is the portion of transmit power 422 allocated to flow I on subframe n. Exemplary equations for T2POutflow _i,n are given below. BucketLevelSat _i,n+1 is the saturation level 1135 of the cumulative power allocation 1238b for stream i on subframe n+1.

T2POutflow _{i, n} can be expressed as:

${\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; POutflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; (</span>\frac{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}}{{\mathrm{<span\; class="notranslate">\; Sumpayload</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; Txt</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; )</span>$

In equation (4), d _i,n is the amount of data from flow i contained in the subpackets transmitted during subframe n. (A subpacket is the portion of a packet transmitted during a subframe.) SumPayload _n is the sum of d _i,n . TxT2P _n is the power level 422 of a subpacket transmitted during subframe n.

BucketLevelSat _{i, n+1} can be expressed as:

BucketLevelSat _{i, n+1} =

BurstDurationFactor _i x BucketFactor(T2PInflow _i,n , FRAB _i,n ) x T2PInflow _i,n (5) BurstDurationFactor _i is a limit on the length of time flow i is allowed to be delivered at peak power allocation 1238c.

FIG. 13 illustrates one method by which an AT 1306 may obtain a current power allocation 1338a for a stream 1316 on the AT 1306. As shown, AT 1306 may receive grant message 1342 from scheduler 1340 running on AN 1304. Grant message 1342 may include current power allocation grant 1374 for some or all of streams 1316 on AT 1306. For each current power allocation grant 1374 received, the AT 1306 sets the current power allocation 1338a of the corresponding flow 1316 equal to the current power allocation grant 1374. the

In some embodiments, obtaining the current power allocation 1338a is a two-step process. The first step involves determining whether a current power allocation grant 1374 has been received for flow 1316 from AN 1304. If not, the AT 1306 autonomously determines the current power allocation 1338a for the flow 1216. In other words, the AT 1306 determines the current power allocation 1338a for the flow 1316 without interference from the scheduler 1340. The following discussion relates to an exemplary method by which the AT 1306 autonomously determines the current power allocation 1338a for one or more streams 1316 on the AT 1306. the

FIG. 14 shows a reverse active bit (RAB) 1444 transmitted from the AN 1404 to the AT 1406 in sector 1432. RAB 1444 is an overload indicator. RAB 144 may be one of two values, a first value indicating that sector 1432 is currently busy (eg, +1), or a second value indicating that sector 1432 is currently free (eg, -1). As will be explained below, the RAB 1444 can be used to determine the current power allocation 1238a for the stream 1216 on the AT 1206. the

FIG. 15 illustrates information that may be maintained on the AT 1506 to facilitate determining the current power allocation 1238a for one or more streams 1516 on the AT 1506. In the exemplary embodiment, each stream 1516 is associated with a "fast" estimate of the RAB 1444. In this paper, the quick estimate will be referred to as QRAB 1546. An exemplary method for determining QRAB 1546 will be described below. the

Each stream 1516 is also associated with an estimate of the longer term load level for the sector 1232, referred to herein as a FRAB 1548 (which holds the "filtered" RAB 1444). FRAB 1548 is a real number somewhere between the two possible values of RAB 1444. The closer FRAB 1548 is to the value of RAB 1444 indicating that sector 1432 is busy, the more loaded sector 1432 is. Conversely, the closer FRAB 1548 is to the value of RAB 1444 indicating that sector 1432 is free, the less loaded sector 1432 is. An exemplary method for determining FRAB 1548 is described below. the

Each stream 1516 is also associated with an upward ramping function 1550 and a downward ramping function 1552 . The ramp up function 1550 and ramp down function 1552 associated with a particular stream are a function of the current power allocation 1238a of the stream 1516 . Up ramp function 1550 associated with stream 1516 is used to determine an increase in current power allocation 1238a for stream 1516 . Instead, a down ramp function 1552 associated with stream 1516 is used to determine a reduction in the current power allocation 1238a for stream 1516. In some embodiments, ramp up function 1550 and ramp down function 1552 depend on the value of FRAB 1548 and the current power allocation 1238a of stream 1516. the

For each flow 1516 in the network, an up-ramp function 1550 and a down-ramp function 1552 are defined and can be downloaded from the AN 1404 of the AT 1506 controlling that flow. The ramp-up and ramp-down functions take as their argument the current power allocation 1238a of the stream. Up ramp function 1550 will sometimes be referred to herein as gu, while down ramp function 1552 will sometimes be referred to herein as gd. We refer to the ratio gu/gd (which is also a function of the current power allocation 1238a) as the demand function. It can be shown that the reverse link (RL) medium access control (MAC) layer algorithm converges to the current power allocation 1238a for each flow 1516 under data and access terminal power efficient conditions such that when taking their flow When the distribution of , all flow demand function values are equal. Exploiting this fact, by carefully designing the flow demand function, it is possible to achieve the same general mapping as any flow plan and requirement for resource allocation achievable by a centralized scheduler. But the demand function approach is to realize this general scheduling capability with minimal control signaling and in a fully decentralized manner. the

16 is a block diagram illustrating exemplary functional components in an AT 1606 that may be used to determine QRAB 1646 and FRAB 1648. As shown, the AT 1606 may include a RAB demodulation component 1654, a mapper 1656, first and second single-pole IIR filters 1658, 1660, and a limiting device 1662. the

RAB 1644 is communicated from AN 1604 to AT 1606 via communication channel 1664. RAB demodulation component 1654 demodulates the received signal using standard techniques well known to those skilled in the art. RAB demodulation component 1654 outputs log-likelihood ratios (LLRs) 1666 . Mapper 1656 takes as input LLR 1666 and maps the LLR to a value between the possible values (e.g., +1 and -1) of RAB 1644, which is an estimate of the RAB transmitted for that slot. the

The output of mapper 1656 is provided to a first single-pole IIR filter 1658 . The first IIR filter 1658 has a time constant τ _s . The output of the first IIR filter 1658 is provided to a limiting device 1662 . Limiting device 1662 converts the output of first IIR filter 1658 into one of two possible values corresponding to the two possible values of RAB 1644 . For example, if RAB 1644 is -1 or +1, limiting device 1662 converts the output of first IIR filter 1658 to -1 or +1. The output of restriction device 1662 is QRAB 1646. The time constant τ _s is chosen such that QRAB 1646 represents an estimate of the current value of RAB 1644 communicated from AN 1604 . An exemplary value for the time constant τ _s is four time slots.

The output of mapper 1656 is also provided to a second single-pole IIR filter 1660 with time constant _τ1 . The output of the second IIR filter 1660 is FRAB 1648 . The time constant τ ₁ is much larger than the time constant τ _s . An exemplary value for the time constant _τ1 is 384 time slots.

The output of the second IIR filter 1660 is not provided to the limiting device. So, as stated above, FRAB 1648 is a real number somewhere between the first value of RAB 1644 indicating that sector 1432 is busy and the second value of RAB 1644 indicating that sector 1432 is free. the

17 illustrates an exemplary methodology 1700 for determining a current power allocation 1238a for a stream 1216 on an AT 1206. Step 1702 of method 1700 involves determining the value of QRAB 1546 associated with stream 1216. In step 1704, it is determined whether QRAB 1546 is equal to a busy value (i.e., a value indicating that sector 1432 is currently busy). If QRAB 1546 is equal to the busy value, then in step 1706, the current power allocation 1238a is reduced, i.e., the current power allocation 1238a of the stream 1216 at time n is less than the current power allocation 1238a of the stream 1216 at time n-1. The magnitude of the reduction can be calculated using a down ramp function 1552 defined for the stream 1216 . the

If QRAB 1546 is equal to the idle value or not equal to the busy value, then in step 1708, the current power allocation 1238a is increased, i.e. the current power allocation 1238a of the stream 1216 during the current time interval is greater than the current power of the stream 1216 during the most recent time interval Assignment 1238a. The magnitude of the increase can be calculated using the ramp-up function 1550 defined for the stream 1216 . the

Ramp up function 1550 and ramp down function 1552 are a function of the current power allocation 1238a, and may potentially be different for each stream 1516 (downloadable by AN 1404). This is how each flow gets QOS distinction with autonomous allocation. Likewise, the value of the ramp function can be varied with FRAB 1548, indicating that the dynamic characteristics of the ramp can vary with load, which allows faster convergence to a fixed point below less loaded conditions. the

In the case of increasing the current power allocation 1238a, the magnitude of the increase can be expressed as:

ΔT2PInflow _{i, n} =

+1×T2PUp _i (10×log ₁₀ (T2PInflow _{i, n-1} )+PilotStrength _i (PilotStrength _{n, s} ), FRAB _n ) (6)

In the case of reducing the current power allocation 1238a, the magnitude of the reduction can be expressed as:

ΔT2PInflow _{i, n} =

-1×T2PDn _i (10×log ₁₀ (T2PInflow _{i, n-1} )+PilotStrength _i (PilotStrength _{n, s} ), FRAB _n ) (7)

T2PUp _i is the ramp up function 1550 for stream i. T2PDn _i is the ramp down function 1552 for flow i. PilotStrength _n,s is a measure of the pilot power of the serving sector versus the pilot power of other sectors. In some embodiments, it is the ratio of the serving sector FL pilot power to the other sector pilot power. PilotStrength _i is a function that maps pilot strength to an offset in the T2P argument of the ramp function and can be downloaded from AN. In this way, the AT's upstream priority can be adjusted based on the AT's position in the network as measured by the variable PilotStrength _n,s .

The current power allocation 1238a can be expressed as:

${\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PInflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PFillerTC</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PInflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; +</span>$

$<span\; class="notranslate">\; (</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PFilterTC</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; POutflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; \&Delta;T</span>}\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; PInflow</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 8</span>}<span\; class="notranslate">\; )</span>$

As can be seen from the above equation, when the saturation level 1135 is reached and the ramp is set to zero, the current power allocation 1238a decays exponentially. This allows maintaining the value of the current power allocation 1238a for bursty traffic sources, whose duration should be longer than the typical inter-packet time. the

In some embodiments, for each sector in the AT 1206 active set, a QRAB value 1546 is estimated. If any sector's QRAB in the AT's active set is busy, then the current power allocation is decreased 1238a. If the QRABs of all sectors in the AT's active set are free, then the current power allocation is increased 1238a. In an alternative embodiment, another parameter QRABps may be defined. For QRABps, the measured pilot strength is considered. (Pilot strength is a measure of the serving sector pilot power versus other sector pilot power. In some embodiments, it is the ratio of serving sector FL pilot power to other sector pilot power.) If sector If the ARQB of s is busy, set QRABps as the busy value, where sector s satisfies one or more of the following conditions: (1) sector s is the forward link serving sector of the access terminal; The DRCLock bit of the sector s is out-of-lock, and the PilotStrength _{n of the sector s, s} is greater than the threshold; (3) The DRCLock bit from the sector s is locked (in-lock), and the PilotStrength of the sector _{n, s} is greater than the threshold. Otherwise, QRABps is set to the idle value. In an embodiment determining QRABps, the current power allocation 1238a may be increased when the QRABps is idle, and may be decreased 1238a when the QRABps is busy.

FIG. 18 shows the AT 1806 sending a request message 1866 to the scheduler 1840 on the AN 1804. FIG. 18 also shows a scheduler 1840 sending a grant message 1842 to the AT 1806. In some embodiments, the scheduler 1840 may proactively send a grant message 1842 to the AT 1806. Alternatively, scheduler 1840 may send a grant message 1842 to AT 1806 in response to request message 1866 sent by AT 1806. Request message 1866 includes AT power headroom information and per-flow queue length information. the

FIG. 19 shows information that may be retained on the AT 1906 to enable the AT 1906 to determine when to send a request message 1866 to the AN 1804. As shown, the AT 1906 can be associated with a request ratio. Request ratio 1968 represents the ratio of request message size 1866 sent on reverse traffic channel 208 to data sent on reverse traffic channel 208 . In some embodiments, when the request ratio 1968 decreases below a certain threshold, then the AT 1906 sends a request message 1866 to the scheduler 1840. the

AT 1906 may also be associated with a request time interval 1970. Request interval 1970 represents the period of time since the last request message 1866 was sent to scheduler 1840 . In some embodiments, when the request time interval 1970 increases above a certain threshold, the AT

1906 sends a request message 1866 to the scheduler 1840 . The two methods of triggering the request message 1866 can also be used together (ie, the request message 1866 can be sent whenever either method results in the message being sent). the

FIG. 20 shows an exemplary interaction between a scheduler 2040 running on the AN 2004 and an AT 2006 within a sector 2032. 20, scheduler 2040 may determine current power allocation grants 1374 for subset 2072 of ATs 2006 within sector 2032. A separate current power allocation grant 1374 may be determined for each AT 2006. When the ATs 2006 in the subset 2072 include more than one flow 1216, the scheduler 2040 may determine a separate current power allocation grant 1374 for some or all of the flows 1216 on each AT 2006. Scheduler 2040 periodically sends grant messages 2042 to ATs 2006 in subset 2072. Scheduler 2040 does not determine current power allocation grants 1374 for ATs 2006 within sectors 2032 that are not part of subset 2072. Instead, the remaining ATs 2006 within the sector 2032 autonomously determine their own current power allocation 1038a. Grant message 2042 may include hold times for some or all of current power allocation grants 1374 . The hold time for the current power allocation grant 1374 represents the length of time the AT 2006 will maintain the current power allocation 1238a for the corresponding flow 1216 at the level specified by the current power allocation grant 1374. the

According to the method shown in FIG. 20 , the scheduler 2040 is not designed to satisfy all the capacity in the sector 2032 . Instead, the scheduler 2040 determines the current power allocation 1038a for the ATs 2006 within the subset 2072, and the remaining ATs 2006 then efficiently use the remaining sector 2032 capacity without interference from the scheduler 2040. Subset 2072 may change over time and may change with each grant message 2042 . Likewise, the decision to send a grant message 2042 to some subset 2072 of ATs 2006 may be triggered by any number of external events, including the detection of flows that do not meet certain QoS requirements. the

FIG. 21 shows another exemplary interaction between scheduler 2140 running on AN 2104 and AT 2106. In some embodiments, if the AT 2106 is allowed to determine the current power allocations 2138a for the streams 2116 on the AT 2106, each of the current power allocations 2138a will converge to a steady state value over time. For example, if an AT 2106 enters an unloaded sector 1232 with a stream 2116 having data to transmit, the current power allocation 2138a for that stream 2116 will increase until the stream 2116 takes up the entire sector 2132 throughput. However, it takes some time for this to happen. the

In an alternative approach, the scheduler 2140 determines an estimate of the steady state value that the flow in each AT 2106 will eventually reach. Next, the scheduler 2140 may send a grant message 2142 to all ATs 2106. In the grant message 2142 , the current power allocation grant 2174 for a flow 2116 is set equal to an estimate of the steady state value for that flow 2116 as determined by the scheduler 2140 . When the grant message 2142 is received, the AT 2106 sets the current power allocation 2138a of the stream 2116 on the AT 2106 equal to the steady state estimate 2174 in the grant message 2142. Once this is done, the AT 2106 may then be allowed to track any changes in system conditions and autonomously determine the current power allocation 2138a for the stream 2116 without further interference from the scheduler 2140. the

FIG. 22 shows another embodiment of a grant message 2242 transmitted from the scheduler 2240 on the AN 2204 to the AT 2206. As above, the grant message 2242 includes the current power allocation grant 2274 in one or more streams 2216 on the AT 2206. Additionally, the grant message includes a duration period 2276 for some or all of the current power allocation grants 2274 . the

Grant message 2242 also includes cumulative power allocation grant 2278 in some or all streams 2216 on AT 2206. When receiving permission message 2242, AT 2206 will AT

The cumulative power allocation 2238b for the stream 2216 on 2206 is set equal to the cumulative power allocation grant 2278 for the corresponding stream 2216 in the grant message 2242 . the

Figure 23 shows a power profile 2380, which may be stored on the AT2306 in some embodiments. Power profile 2332 may be used to determine payload size 420 and power level 422 of packets transmitted by AT 2306 to AN 204. the

Power profile 2380 includes multiple payload sizes 2320 . The payload sizes 2320 included in the power profile 2380 are the possible payload sizes 2320 of the packets 524 transmitted by the AT 2306. the

Each payload size 2320 in power profile 2380 is associated with a power level 2322 for each possible transmission mode. In the exemplary embodiment, each payload size 2320 is associated with a high capacity power level 2322a and a low latency power level 2322b. High capacity power level 2322a is the power level for high capacity packets 524a with corresponding payload size 2320. The low latency power level 2322b is the power level of the low latency packet 524b having the corresponding payload size 2320 . the

FIG. 24 shows a number of transmission conditions 2482 that may be stored on the AT 2406. In some embodiments, the transmission conditions 2482 affect the selection of the payload size 420 and power level 422 of the packet 524 . the

Transmission conditions 2482 include allocated power conditions 2484 . Allocated power conditions 2484 generally involve ensuring that the AT 2406 does not use more power than it is allocated. More specifically, the allocated power condition 2484 is that the power level 422 of the packet 524 does not exceed the total available power 1034 of the AT 2406. Different exemplary methods for determining the total available power 1034 of the AT 2406 are discussed above. the

Transmission conditions 2482 also include maximum power conditions 2486 . The maximum power condition 2486 is that the power level 422 of the packet 524 does not exceed the maximum power level assigned to the AT 2406. the

Transfer conditions 2482 also include data conditions 2488 . The data condition 2488 generally involves ensuring that the payload size 420 of the packet 524 is not too large considering the total available power 1034 of the AT 2406 and the amount of data currently available to the AT 2406 for transmission. More specifically, data condition 2488 is the absence of payload size 2320 in power profile 2380, which corresponds to the lower power level 2322 of the transmission mode of packet 524, and is capable of carrying the smaller of:

(1) The amount of data currently available for transmission, and (2) The amount of data corresponding to the total available power of AT 2406 1034. the

A mathematical description of the transfer condition 2482 is given below. The allocated power condition 2484 can be expressed as:

TxT2PNominalPS _{, TM} ≤ _{∑ i ∈ F} (PotentialT2POutflow _{i, TM} ) (9)

TxT2PNominalPS _,TM is the payload size PS and the power level 2322 of the transmission mode TM. F is the set of flows 418 .

The maximum power condition 2486 can be expressed as:

max(TxT2P PreTransitionPS _{, TM} , TxT2P PostTransitionPS _{, TM} )≤TxT2Pmax (10)

In some embodiments, at some point during the transmission of the packet 524, the power level 422 of the packet 524 is allowed to transition from a first value to a second value. In such an embodiment, the power level 2322 specified in the power profile 2380 includes a pre-conversion value and a post-conversion value. TxT2P PreTransition _PS,TM is the pre-transition value of payload size PS and transmission mode TM. TxT2P PostTransition _PS,TM is the post-transition value of payload size PS and transmission mode TM. TxT2 Pmax is the maximum power level defined for the AT 206 and may be a function of the PilotStrength measured by the AT 206 . PilotStrength is a measure of the pilot power of the serving sector versus the pilot power of other sectors. In some embodiments, it is the ratio of serving sector FL pilot power to other sector pilot power. It can be used to control the up and down tilts that the AT 206 performs autonomously. It can also be used to control TxT2Pmax so that ATs 206 in poor geometry (eg, at the edge of multiple sectors) can limit their maximum transmit power to avoid unwanted interference with other sectors.

In some embodiments, the data condition 2488 is no payload size 2320 in the power profile 2380, which corresponds to the lower power level 2322 of the transmission mode of the packet 524, and the size of the payload that can be carried is given by :

∑ _i∈F min(d _{i, n,} T2PConversionFactor _TM × PotentialT2POutflow _{i, TM} )(11)

In Equation 11, d _i,n is the amount of data from stream i included in the subpacket transmitted during subframe n. The expression T2PConversionFactor _TM ×PotentialT2POutflow _{i, TM} is the transmittable data of the flow i, that is, the amount of data corresponding to the total available power 1034 of the AT 2406 . T2PConversionFactor _™ is the conversion factor used to convert the total available power 1238 of stream i into data levels.

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

If the packet 524 was transmitted with the selected payload size 2320 and corresponding power level 2322, step 2506 involves determining whether the transmission condition 2482 is satisfied. If it is determined in step 2506 that the transmission conditions are met, then in step 2508 the selected payload size 2320 and corresponding power level 2322 are sent to the physical layer 312 . the

If in step 2506 it is determined that the transmission condition 2482 has not been met, then in step 2510 a different payload size 2320 is selected from the power profile 2380 . Method 2500 then returns to step 2504 and proceeds as described above. the

The design principle for multi-stream allocation is that the total available power is equal to the sum of the available power for each stream in the access terminal. This approach works well regardless of whether the access terminal itself is operating beyond transmit power due to hardware limitations or due to TxT2Pmax limitations. When transmit power is limited, further arbitration of flow power allocation is necessary in the access terminal. As mentioned above, the gu/gd demand function determines the current power allocation for each stream in the absence of power constraints by a normal function of RAB and stream tilt. Now when AT power is limited, one way to set up flow allocation is to treat AT power limit as strictly similar to sector power limit. Typically, a sector has a maximum received power criterion, which is used to set the RAB, which then generates the power allocation for each stream. The idea is that when an AT is power limited, each stream in that AT is set to the power allocation it will receive if the AT's power limit is actually the corresponding limit of the power received by the sector. By running a virtual RAB inside the AT, or by other equivalent algorithms, the flow power allocation can be determined directly from the gu/gd demand function. In this way, the internal AT (intra-AT) flow priority is preserved and is consistent with the intermediate AT (inter-AT) flow priority. Also, information outside the existing gu and gd functions is unnecessary. the

A summary of the various features in some or all of the embodiments described herein will now be given. The system allows for decoupling of average resource allocation (T2PInflow), and how this resource is used for packet allocation (including control of peak rate and peak pulse duration). the

In all cases, group allocation can remain autonomous. For average resource allocation, either scheduled allocation or autonomous allocation is possible. This allows scheduled allocation and autonomous allocation to be seamlessly combined, since the packet allocation process works the same in both cases, and the average resource may be updated often or not as desired. the

Control of the hold time in grant messages allows precise control over resource allocation timing with minimal signaling overhead. the

The control of the BucketLevel in the permission message facilitates the rapid injection of resources into the flow without affecting its even distribution in time. This is a 'formerly used' resource injection. the

The scheduler can make 'fixed point' estimates, or correct resource allocations for each flow, and then download these values to each flow. This shortens the time the network is close to its correct allocation ('coarse' allocation), after which the autonomous mode quickly completes the final allocation ('fine' allocation). the

The scheduler can issue grants to a subset of streams and allow other runs to allocate autonomously. In this way, resource guarantees can be made for some major streams, so that the remaining streams automatically 'fill up' the remaining capacity as best they can. the

The scheduler may implement a 'shepherding' function, where the transmission of a grant message occurs only if the flow does not meet the QoS requirements. Otherwise, the stream is allowed to set its own power allocation autonomously. In this way, QoS guarantees can be made with minimal signaling and overhead. Note that in order to achieve the QoS goal of the flow, the bootstrap scheduler may grant power allocation different from the autonomously allocated fixed-point solution. the

AN can specify ramp functions (up or down ramp functions) for each stream design. By choosing these ramping functions appropriately, we can precisely specify an arbitrary average resource allocation per stream, operating purely autonomously, using only 1-bit of control information in each sector. the

The very fast timing implemented in the QRAB design (updated every slot and filtered with a short time constant on each AT) facilitates very tight control over power allocation per stream and maximizes overall sector capacity , while maintaining stability and footprint. the

Peak power control per stream is allowed as a function of average power allocation and sector load (FRAB). This facilitates a trade-off between timeliness and stability of bursty traffic that affects the load on the entire sector. the

Using the BurstDurationFactor allows control over the maximum duration that each stream is transmitted at the peak power rate. Combined with peak rate control, this facilitates control over sector stability and peak load without the need for centralized coordination of master flow allocations and facilitates tuning needs to specific source types. the

Allocation to burst sources is handled elegantly by the bucketing mechanism and persistence of T2PInflow, which allows for mapping the average power allocation to burst sources while maintaining control over the average power. The T2PInflow filter time constant controls the duration, during which sporadic packet arrivals are allowed, and beyond the duration T2PInflow decays to a minimum allocation. the

The tilt correlation of T2PInflow on FRAB allows higher tilt dynamics in less loaded sectors without affecting the final average power allocation. In this way, aggressive ramping can be performed when the sector is less loaded, while maintaining good stability at high load levels by reducing ramp aggressiveness. the

T2PInflow operates autonomously, automatically tuning to the correct allocation for a given flow based on flow priority, data requirements, and available power. When the flow exceeds the allocation, the BucketLevel reaches the BucketLevelSat value, the ramp-up stops, and the T2PInflow value will decay down to a level where the BucketLevel is less than the BucketLevelSat. That's the proper allocation for T2PInflow. the

In addition to the QoS distinction of each flow in the autonomous allocation based on the up/down slope function design, the flow power allocation can also be controlled based on the channel condition through the slope correlation on QRAB or QRABps and PilotStrength. In this way, streams in poor channel conditions can get lower allocations, reducing interference and increasing the overall capacity of the system, or can get full allocations independent of channel conditions, which maintain consistent performance at the expense of system capacity. This allows control of the fairness/overall benefit tradeoff. the

As much as possible, the mid-AT and intra-AT power allocation for each stream is as location-independent as possible. This means that it does not matter what other streams are on the same AT or on other ATs, the allocation of streams depends only on the total sector load. A number of practical facts limit how far this goal can be accomplished, in particular the maximum AT transmit power, and issues regarding merging HiCap and LoLat streams. the

Consistent with this approach, the total available power allocated to an AT packet is the sum of the available power for each stream in the AT, subject to the AT's transmit power limit. the

Regardless of the rules used to determine the allocation of data from each flow included in the packet allocation, we maintain an accurate calculation of the usage of the source of the flow in terms of bucket extraction. In this way, the fairness of the intermediate streams of any data distribution rules is ensured. the

When the AT is power limited and cannot fit into the total power available to all its streams, power from each stream is used which fits into the less power available inside the AT. That is, streams inside ATs maintain the correct priority with respect to each other as if they were sharing a sector with those ATs and this maximum power level (AT power limits are generally similar to sector power limits). The remaining power in the sector that is not consumed by the power-limited ATs can then be used as usual for other flows in the sector. the

High-volume flows ca can be coalesced into low-latency transmissions when the sum of high-capacity potential data usage in an AT is high enough that non-coalescing would result in a large power difference between packets. This maintains a flatness of transmit power suitable for self-jamming systems. When a specific high-capacity flow has latency requirements such that it cannot wait for all low-latency flows in the same AT to be transmitted, the high-volume flow can be merged into a low-latency transmission. After reaching a threshold of potential data usage, the flow can be transferred to Its data is consolidated into low-latency transfers. In this way, the latency requirements of high-volume flows can be met while sharing the AT with persistent low-latency flows. High volume streams can be merged into low latency transmissions when the sector load is low, the efficiency penalty of transmitting high volume streams as low latency streams is insignificant, and thus coalescing can always be allowed. the

When the packet size for high capacity mode will be at least PayloadThresh size, a set of high capacity flows can be transmitted in low latency mode even if there are no active low latency flows. This allows high-capacity mode flows to achieve the highest throughput when their power allocation is high enough, because AT's highest throughput occurs in the largest packet size and low-latency transmission mode. In other words, the peak rate of the high-volume transfer is much lower than the peak rate of the low-latency transfer, so it is appropriate to allow the high-volume mode stream to use the low-latency transfer when it reaches the highest throughput. the

Each stream has a T2Pmax parameter that constrains its maximum power allocation. There is also a need to constrain the AT's total transmit power, perhaps depending on its location in the network (eg, when at the border of two sectors, the AT generates more interference and affects stability). The parameter TxT2Pmax can be designed as a function of PilotStrength and limit the maximum transmit power of the AT. the

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

The AT 2606, which may be implemented in a wireless communication device such as a cellular telephone, may also include a housing 2607 that houses a transmitter 2608 and a receiver 2610 to allow data, such as audio communications, between the AT 2606 and a remote station (such as an AN 204) between transmission and reception. Transmitter 2608 and receiver 2610 may be combined into transceiver 2612. Antenna 2614 is attached to housing 2607 and is electrically connected to transceiver 2612. Other antennas (not shown) may also be used. The operation of transmitter 2608, receiver 2610, and antenna 2614 is well known in the art and need not be described herein. the

The AT 2606 also includes a signal detector 2616 for detecting and quantifying signal levels received by the transceiver 2612. Signal detector 2616 detects signals such as total energy, pilot energy per pseudo noise (PN) chip, power spectral density, and other signals known in the art. the

The state switch 2626 of the AT 2606 controls the state of the wireless communication device based on the current state and other signals received by the transceiver 2612 and detected by the signal detector 2616. A wireless communication device is capable of operating in any of a number of states. the

The AT 2606 also includes a system determiner 2628, which is used to control the wireless communication device, and determine which service providing system the wireless communication device should turn to when it determines that the current service providing system does not meet the requirements. the

The different components of the AT 2606 are connected together by a bus system 2630, which may include a function bus, a control signal bus, and a status signal bus in addition to a data bus. However, for simplicity, the various buses are shown as bus system 2630 in FIG. 26 . The AT 2606 may also include a digital signal processor (DSP) 2609 for use in processing signals. Those skilled in the art will appreciate that the AT 2606 shown in FIG. 6 is a functional block diagram rather than a list of specific components. the

Those of skill in the art would understand that information and signals may be represented by any of a number of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, light fields or particles, or any of them combination to represent. the

Those skilled in the art will further appreciate that various exemplary logical blocks, modules, circuits, and algorithm steps described in conjunction with the embodiments disclosed herein may be implemented by electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality 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

The various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments disclosed herein may be implemented with a general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general-purpose 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, eg, a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a DSP core, or any other combination of such structures. the

The steps of methods or algorithms described in conjunction with the embodiments disclosed herein may be directly implemented in hardware, in software modules executed by a processor, or in a combination of both. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. Alternatively, the storage medium may be integrated on the processor. The processor and storage medium can be located in the ASIC. The ASIC may be located in the user terminal. Alternatively, the processor and the storage medium may be located in the user terminal as separate components. the

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the spirit and scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. the

Claims (12)

1. method that accesses terminal that is used to be configured in the sector, carry out radio communication with access network, described method comprises:

Estimation is by the currency of the counter actuation blt of described access network emission;

If it is busy that the currency of the described counter actuation blt of estimating shows described sector, the current power that then reduces each stream in a plurality of streams on described the accessing terminal is distributed, the magnitude that reduces for specific stream is according to determining the function that the current power that described downslope function is described stream is distributed for the downslope function of described stream design; With

If the currency of the described counter actuation blt of estimating shows described sectors free, the current power that then increases each stream in the described a plurality of streams on described the accessing terminal is distributed, magnitude for the increase of specific stream is according to determining the function that the current power that described upslope function is described stream is distributed for the upslope function of described stream design.

2. the method for claim 1 estimates that wherein the currency of described counter actuation blt is carried out once by each time slot.

3. method as claimed in claim 2, wherein said estimation comprise with the filter with adjustable time constant, the signal that receives from described access network are carried out filtering.

4. the method for claim 1, wherein said method further comprises:

Estimate the load level of described sector; With

Determine the peak power distribution of each stream in described a plurality of stream, the function of the estimation of the current power distribution that the described peak power distribution of specific stream is described stream and the load level of described sector.

5. the method for claim 1, wherein said method further comprise, for each stream:

Determine the cumulative power distribution of described stream;

Use the current power of described stream to distribute and the cumulative power of described stream distributes to determine total available horsepower of described stream; With

Use total available horsepower of described stream to determine to be transmitted into the power level of the grouping of described access network.

6. method as claimed in claim 5, the cumulative power distribution of wherein said stream is subjected to the saturated level restriction, and described saturated level is to be higher than the be provided with factor that peak power is distributed.

7. the method for claim 1, wherein said downslope function and described upslope function all depend on the estimation to the load level of described sector.

8. the method for claim 1, wherein said downslope function and described upslope function all depend on the pilot frequency intensity that is accessed terminal and measured by described.

9. the method for claim 1, wherein said current power are distributed according to following formula and are determined:

T2PInflow wherein _{I, n}The described current power that is subframe n upper reaches i is distributed, and wherein T2PFilterTC is a filter time constant, increases if wherein described current power is distributed, then Δ T2PInflow _{I, n}Be expressed as:

ΔT2PInflow _i，n＝

+1×T2PUp _i(10×log ₁₀(T2PInflow _i，n-1)+PilotStrength _i(PilotStrength _n，s)，FRAB _n)

If distributing, wherein described current power reduces, then Δ T2PInflow _{I, n}Be expressed as:

ΔT2PInflow _i，n＝

-1×T2PDn _i(10×log ₁₀(T2PInflow _i，n-1)+PilotStrength _i(PilotStrength _n，s)，FRAB _n)

T2PUp wherein _iBe the upslope function of stream i, wherein T2PDn _iBe the downslope function of stream i, and PilotStrength the measuring the pilot power of described other sector that be described serving sector pilot power wherein; T2POutflow _{I, n-1}It is the transmitting power part of on subframe n-1, distributing to stream I.

10. one kind accesses terminal, and it is configured to carry out radio communication in inside, sector with access network, comprising:

Be used to estimate device by the currency of the counter actuation blt of described access network emission;

Be used for showing under the busy situation in described sector at the currency of the described counter actuation blt of estimating, reduce the current power assigned unit of each stream in a plurality of streams on described the accessing terminal, the described magnitude that reduces for specific stream is according to determining the function that the current power that described downslope function is described stream is distributed for the downslope function of described stream design; With

Be used for showing under the situation of described sectors free at the currency of the described counter actuation blt of estimating, increase the current power assigned unit of each stream in a plurality of streams on described the accessing terminal, magnitude for the described increase of specific stream is according to determining the function that the current power that described upslope function is described stream is distributed for the upslope function of described stream design.

11. as claimed in claim 10 accessing terminal further comprises:

Be used to estimate the device of the load level of described sector; With

The peak power assigned unit that is used for each stream of definite described a plurality of streams, the function of the current power distribution that the described peak power distribution of specific stream is described stream and the load level of described sector.

12. as claimed in claim 10 accessing terminal further comprises, for each stream:

Be used for determining the cumulative power assigned unit of described stream;

Be used to use the current power of described stream to distribute and the cumulative power of described stream distributes to determine the device of total available horsepower of described stream; With

Be used to use total available horsepower of described stream to determine to be transmitted into the device of power level of the grouping of described access network.

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