CN100553171C - Control channel in the communication system is carried out the method and apparatus of power division - Google Patents

Abstract

The invention discloses a kind of apparatus and method that are used for carrying out the control channel power division in communication system.The method of control channel power division comprises among embodiment: with a plurality of series classifications of increasing progressively with required media interviews control (MAC) channel power of accessing terminal in a plurality of gatherers, if the MAC channel power that two or more access terminal required equates, the series classification that accesses terminal and successively decrease that then required MAC channel power is equated with forward direction link signal and interference and noise ratio (FL_SINR), and based on total MAC channel power, distribute to the gross power of reverse power control (RPC) channel, determine total available ARQ power with the gross power of distributing to counter actuation blt (RAB) channel.

Description

Control channel in the communication system is carried out the method and apparatus of power division

Require priority according to 35U.S.C. § 119

The application requires to submit on July 25th, 2003 be entitled as " method and apparatus that is used for the control channel power division of communication system " the 60/490th, the priority of No. 338 provisional application, and transfer the assignee at this, thereby be combined in herein as a reference especially.

Technical field

The present invention relates to the communication in the wireless communication system.More specifically, the present invention relates to be used for such communication system carried out the method and system of power division to control channel.

Background technology

Communication system has developed into and information signal can be transferred to physically different points of destination from the starting station.When utilizing communication channel from starting station transmit information signals, information signal at first is converted into the form that is fit to by the communication channel high efficiency of transmission.Conversion or adjustment to information signal comprise the parameter that changes carrier wave according to information signal, and the modulated spectrum of carrier that the result is generated is limited in the bandwidth of communication channel.At the place, point of destination, original information signal is rebuild from the modulated carrier wave that receives by communication channel.Usually, such reconstruction is by using the opposite process of modulated process that adopts with the starting station to realize.

Need carry out suitable power division to the control channel of supporting rl transmission.And wish that the MAC channel power can not become the limiting factor of supporting a large amount of reverse link users simultaneously.Because in given half crack (half-time-slot), the MAC channel can form two pulse trains immediately before or after pilot burst (pilotburst), have only limited time quantum can be used for the MAC channel power is distributed to control channel.Wish to guarantee the restriction of supported number of users is not simultaneously caused owing to the MAC channel power, but owing to reverse chain-circuit capacity causes.In addition, communication system may need both to have supported old accessing terminal, promptly, abide by such as the such standard of IS-856 standard and utilize accessing terminal of reverse link transmission, support novel accessing terminal again, that is, abide by with IS-856 and utilize accessing terminal of reverse link transmission to returning compatible standard.Therefore, exist in this area and in such communication system control channel is carried out the demand of the apparatus and method of power division.

Summary of the invention

In one embodiment of the invention, above-described demand is satisfied by the method for following control channel power division, this method comprises: a plurality of series classifications that increase progressively with required media interviews control (MAC) channel power that access terminal are arrived in a plurality of gatherers (bin), if the MAC channel power that two or more access terminal required equates, then with the forward direction link signal to the order classification of disturbing and the ratio (FL-SINR) of noise successively decreases that accesses terminal that required MAC channel power is equal, and based on total MAC channel power, distribute to the gross power of reverse power control (RPC) channel, determine total available ARQ power with the gross power of distributing to counter actuation blt (RAB) channel.

Description of drawings

Fig. 1 shows the notional block diagram of communication system;

Fig. 2 shows the reverse link structure that is used for the novel simplification that accesses terminal;

Fig. 3 shows the time slot in the forward link structure;

Fig. 4 shows the flow chart of embodiment that control channel is carried out the method for power division;

Fig. 5 A-C shows the flow chart of embodiment more specifically that control channel is carried out the method for power division;

Fig. 6 shows and accesses terminal; And

Fig. 7 shows access point.

Embodiment

Fig. 1 shows the schematic diagram of the communication system of typical code division multiple access (CDMA).Access point 100 is sent to data by forward link 106 (1) and accesses terminal 104, and 104 receives data by reverse link 108 (1) from accessing terminal.Similarly, access point 102 is sent to another by forward link 106 (2) with data and accesses terminal 104, and accesses terminal from this by reverse link 108 (2) and 104 to receive data.The maximum rate that transfer of data on the forward link can be supported with forward direction link and communication system or with the speed near this maximum rate carries out from an access point to with accessing terminal.The additional channel of forward link, for example control channel can be transferred to one from a plurality of access points and access terminal.Reverse link data communication can access terminal from one and be transferred to one or more access points.Access point 100 and access point 102 are connected on the access network controller 110 by backhaul (backhaul) 112 (1) and 112 (2)." backhaul " is the communication link between controller and the access point.Although Fig. 1 has only shown that two access terminal and an access point, this is just in order to illustrate, and this communication system can comprise a plurality of accessing terminal and access point.

Allow to access terminal can visit the registration of access network after, access terminal 104 and one of them access point (for example access point 100), utilize predetermined access procedure to set up communication link.Under the connection status that is produced by predetermined access procedure, accessing terminal 104 can receive data and control messages from access point 100, and data and control messages can be sent to access point 100.104 search constantly that access terminal can be added to other access point in 104 the active set of accessing terminal.Active set comprise can with the tabulation of 104 access points of communicating by letter that access terminal.When such access point is found, 104 quality metrics that calculate the forward link of these access points that access terminal, it can comprise the ratio (SINR) of signal and interference and noise.SINR can determine according to pilot signal.Access terminal 104 the search other access points, and for from those access points each the transmission signal and the signal that receives at 104 places that access terminal determine SINR.Simultaneously, access terminal and 104 calculate the quality metric of preceding paragraph link for each access point in 104 the active set of accessing terminal.If the situation that is higher than predetermined interpolation threshold value or is lower than predetermined drop threshold from the forward link quality metric of particular access point has continued preset time length, then access terminal and 104 give access point 100 this report information.Can command 104 access points that is specific that access terminal to add to access terminal from the subsequent message of access point 100 in 104 the active set, or from 104 the active set of accessing terminal that specific access point of deletion.

Access terminal and 104 from 104 the active set of accessing terminal, select Service Access Point based on one group of parameter.Service Access Point be for the selected access point of the data communication of particular access terminals, or to the access point of particular access terminals Data transmission.This group parameter can comprise, for instance, and any one in current and previous SINR measured value, the error rate, the packet error rate or a plurality of and other known parameters arbitrarily.Like this, for example, just can select Service Access Point according to the SINR measured value of maximum.Then, access terminal 104 at the last broadcast data request message (DRC message) of data request channel (DRC channel).This DRC message can comprise the data rate of request or optionally, to the indication of the quality of forward link, for example SINR through measuring, the error rate, packet error rate or the like.Access terminal and 104 can command the broadcasting of the DRC message of specifying access point by using code, wherein this code has identified the appointment access point uniquely.Typically, this code comprises walsh code.This DRC information symbol exclusively carries out OR (XOR) computing with unique code.The code that this XOR computing is called as signal covers.Each access point owing to access terminal in 104 the active set is by unique walsh code sign, has only and utilizes correct walsh code to carry out and the selected access point of the identical XOR computings of 104 execution that access terminal this DRC message of could correctly decoding.

Be sent to 104 the data of accessing terminal and arrive access network controller 110.Thereafter, access network controller 110 can send to all access points in 104 active sets that access terminal with data by backhaul 112.Optionally, access network controller 110 can determine at first which access point is access in terminal 104 and is chosen to be Service Access Point, then data is sent to this Service Access Point.These data are stored in the formation (queue) at access point place.One or more then access points send to beep-page message on control channel separately and access terminal 104.The signal that accesses terminal on 104 pairs one or more control channels carries out the demodulation sign indicating number, to obtain beep-page message.

At each forward link at interval, access point can be dispatched to any one transmission that accesses terminal that receives beep-page message.The sequence number of the power division of power control bit " in the cellular network to " (Power Allocation for Power ControlBits in a Cellular Network) is 10/263 in being entitled as of submitting on October 2nd, 2002, in 976 the U.S. Patent application, described the illustrative methods that is used for reverse power control (RPC) channel is carried out power division, wherein this patent application is transferred to the application's assignee.The rate control information that access point is used to receive in the DRC message that each accesses terminal transmits forward link data effectively with the flank speed that may exist.Because data rate may change, so communication system is operated with variable rate mode.Access point is sent to 104 the speed of accessing terminal based on determining from the last look of the 104 DRC message that receive that access terminal with data.In addition, the access point utilization is that unique extended code comes unique identification to accessing terminal 104 transmission for that travelling carriage.This extended code is long pseudo noise (PN) sign indicating number, for example is the extended code by the IS-856 standard definition.

Packet will arrive accesses terminal and 104 receives the decode this packet.Each packet with one for example the such identifier of sequence number be associated, this identifier is access in terminal 104 and is used for losing of detected transmission or repeat.Under these circumstances, access terminal and 104 transmit the sequence number of lost data packet via reverse-link data channel.Then, via the access network controller 110 that receives with accessing terminal 104 access points of communicating by letter from 104 the data-message of accessing terminal, indicate which data cell not to be access in terminal 104 to access point and receive.Such packet is transmitted in the access point arrangement again then.

When under variable rate mode, operate access terminal 104 and access point 100 between communication link deteriorate into predetermined reliability level when following, access terminal and 104 try at first to determine whether another access point in variable rate mode can support acceptable data rate.104 define such access point (for example, access point 102), the sensing again of then linking the access point 102 of different communication links if access terminal.Term point to again be select one different with the sector of current selected and be member's the process of sector of effort scale of accessing terminal.Transfer of data is proceeded from the access point under variable rate mode 102.

The deterioration of above-mentioned communication link may by, for example, the overlay area, shade that 104 overlay areas from access point 100 that access terminal move to access point 102 hides, decline and other well-known reason cause.Optionally, when access terminal 104 and another access point (for example, access point 102) but between communication link become the time spent, this communication link can be realized the throughput also higher than the throughput of the communication link of current use, again the sensing of the access point 102 of linking different communication links takes place to point to, and transfer of data is proceeded from the access point in this variable rate mode 102.104 do not detect the access point that can operate and support acceptable data rate in variable rate mode if access terminal, and then access terminal 104 to be converted to fixed rate mode.In such pattern, access terminal with a speed rates.

Access terminal and 104 not only estimated communication link with all candidate's access points, and select to produce the access point of high-throughput for the data pattern of variable bit rate but also for the data pattern of fixed rate.

If the sector no longer is a member in 104 the active set of accessing terminal, then accesses terminal and 104 can switch back variable rate mode from fixed rate mode.

Reverse link

May needs have not only supported old access terminal but also support new accessing terminal according to the communication system of above-mentioned notion, the wherein old utilization that accesses terminal meets a standard (promptly, IS-856) rl transmission, and new accessing terminal utilizes the rl transmission that meets another standard, it is the patent application serial numbers 10/280 of above-mentioned common pending trial, the rl transmission of describing in 740 and 10/305,338.

The new reverse link that accesses terminal 200 has been shown among Fig. 2.New accessing terminal also is established to a grouping in the frame that comprises 16 time slots.Then, this frame transmits at least in the subframe of two non-adjacent (non-contiguous), and wherein each subframe comprises at least one time slot.Reverse link overhead channel 206 comprises: pilot channel (PC), Auxiliary Pilot Channel (APC), data request channel (DRC), acknowledgement channel (ACK), data source control channel (DSC) and reverse rate indicating channel (RRI).As shown in Figure 2, be grouped in four non-adjacent subframes 202 and transmit, each subframe comprises four time slots.Overhead channel 206 is transmitted continuously.

Reverse link is handled

First subframe of reception that accesses terminal also tries the user data that comprises in this subframe is decoded.Then, access terminal and to transmit response according to decoded results.If this decoding success then this response is to confirm (ACK) is if decoding is unsuccessful then this response is to deny (NAK).

This response received at the access point place before next subframe is transmitted.Subsequently, if access point receives ACK, then the transmission of all residue subframes is interrupted, and access point can transmit the subframe of the grouping that also is not transmitted thitherto.

Forward link structure

Fig. 3 shows the time slot in the forward link structure 300.To be understood that, the scope of duration described below, chip lengths, value all only provides by way of example, and can use other duration, chip lengths, the scope of value, and can not break away from the basic principle of the operation of this communication system.

Forward link 300 is according to frame definition.Frame is the structure that has comprised 16 time slots 302, and each time slot 302 is 2048 chip lengths, and is corresponding with the frame duration of the time slot duration of 1.66ms and 26.66ms.Each time slot 302 is divided into two half crack 302a, 302b, and at each half crack 302a, 302b with interior transmission pilot channel burst string 304a, 304b.Each pilot channel burst string 304a, 304b are that 96 chips are long, are generally centered within the half crack 302a that is associated with it, the midpoint of 302b.Pilot channel burst string 304a, 304b comprise the pilot frequency channel signal that is covered by code (for example, being designated as 0 walsh code down).Pilot channel is the Common Control Channel that is broadcast to all distant stations, that is, the information of utilizing pilot channel to transmit is planned and will be received by all distant stations and use.Usually, control channel carrying overhead data, but but carrying user data also.The term overhead data is the information of the operation of the entity in the enable pass communication system, for example, calls out and keeps signaling, diagnosis and report information or the like.

Forward medium access control (MAC) channel 306 forms two pulse trains, these two pulse trains the pilot burst 304 in each half crack 302 after with before be transmitted immediately.This MAC comprises 128 Codabar code channels at most, and these channels are by the code of 128 rank (128-ary), and for example the walsh code quadrature covers.Each Code Channel is identified by the MAC subscript, and target value is between 1 to 128 under this MAC, and 128 unique rank of this MAC subscript sign cover walsh code.

Reverse power control (RPC) channel is used to regulate the reverse link signal power of each subscriber station.Therefore, the RPC channel is the control channel of subscriber station special use, and promptly the power control information that transmits on specific RPC channel will be received by a distant station and use.RPC is assigned to one of them available MAC, for example, is marked on the MAC between 11 to 127 under the MAC.In one embodiment, MAC subscript 0-1 is retained, and MAC subscript 2-3 is used for control channel, MAC subscript 4 is used for Reverse Activity (RA) channel, MAC subscript 5 is used for broadcasting, and MAC subscript 6-10 is used for multi-user's grouping, and MAC subscript 11-127 is used for RPC, DRC locking (DRC Lock) and ARQ.In one embodiment, MAC subscript 64-67 also is used to control channel.

Reverse Activity (RA) channel is used for activating the reverse link rate that bit (RAB) stream regulates for each subscriber station data by transmitting reverse link, and same, and the RA channel is the control channel that is exclusively used in subscriber station.The RA channel is assigned to one of them available MAC, for example, and MAC subscript 4.

The payload of forward or control channel sends in the remainder 308b of the remainder 308a of the first half crack 302a and the second half crack 302b.Traffic channel carries user data, the i.e. information of non-overhead data.Total transmitting power of forward channel be fix and not time function change like that.

Usually, forward link is exaggerated before transmission.Amplifier can provide limited gross output, and can not make the signal after the amplification produce the distortion of not expecting; Therefore, if emitted power is many more on a channel, the power that can use at other channel will be more little.As described, forward link comprises TDM service channel, pilot channel and many media interviews control channels (MAC).Because forward link is always with limited gross output (P _PAM) emission, and the MAC that comprises Reverse Activity channel (RA), reverse power control channel (RPC), DRC lock channel and confirm/deny channel (ACK/NAK) is by code division multiplexing, so P _PAMMust in the middle of RA channel, RPC channel, DRC lock channel and ACK/NAK channel (ACK/NAK), distribute.

Can guarantee that to the optimum allocation of MAC channel power the MAC channel power is not a limiting factor of supporting big number of users, and can guarantee that reverse chain-circuit capacity is maximized.Unsuitable or inadequate power division may cause the mistake of power control, and it may cause being less than optimum capacity.Unsuitable or inadequate power division is smaller to the influence of RPC channel, because this unsuitable or inadequate power division can be compensated by the control of closed loop (closed-loop) power.On the contrary, may cause grouping not stopped as soon as possible to the inappropriate or inadequate power division of ACK/NAK channel, this will cause to disturb and increase.

Channel is confirmed/denied to forward link

As discussed, communication system may need both to have supported old the accessing terminal that access terminal according to IS-856 standard operation reverse link, supports new the accessing terminal that access terminal according to the conceptual operation reverse link of describing again.In order to support such operation, new the accessing terminal that each transmits on reverse link must be provided the information that whether has been access in a little to be decoded about the user data that transmits in the subframe.For such information and additional channel is provided, need to confirm/deny (ACK/NAK) channel on the forward link.Can provide ACK/NAK channel by homophase and the quadrature branch (branch) that the MAC channel of given terminal is distributed in utilization.

Automatic repetitive requests (ARQ) Channel Transmission rule

(BTS) locates at given base transceiver station, and the physics layer ARQ is applied to all users in the system, and only for the size of small active area equals the ARQ that 1 user supports the MAC layer, wherein the size of small active area is defined as the number of sub-district in the active set.For each user, be carried out polar keying from the ARQ message of Serving cell BTS, if promptly have enough MAC power then after first, second and the 3rd son grouping, confirm (ACK)=+ 1 and deny (NAK)=-1.Non-service cell BTS uses on-off keying (OOK), and promptly ACK=+1 and NAK=0 launch ARQ after first, second and the 3rd son grouping.These ARQ are launched by three time slots.In order to support the ARQ of MAC layer for the user who does not carry out handover, ARQ message is corresponding with the 4th son grouping of using the OOK scheme, in the 4th sub the grouping, and ACK=0 and NAK=-1, and ARQ extension of message to six time slot.It is multiplexed that the ARQ (being also referred to as E-ARQ) of three time slots of expansion and the ARQ that is used for the conventional non-expansion that next height divides into groups are carried out I-Q.

The son grouping is the least unit that can be transmitted by the reverse traffic channel of access network identification in physical layer.Son is grouped in 4 adjacent time-slots and sends.Subframe is one group of 4 adjacent time slot, wherein accesses terminal to send a son grouping in 4 time slots.In the beginning of subframe, the cdma system time among the time slot T is satisfied equation: (T-vertical shift) mould 4=1.Each physical layer packet should be in one or more son groupings, send in 4 son groupings of as many as.Should be two subframes or 13.33 milliseconds to the interval between the continuous sub-transmission packets of single reverse traffic channel physical layer packet.

The reverse traffic channel transmission should be used 4-8-4 time slot interleaving structure.That is, the transmission time slot of physics straton grouping (4 time slot durations) should be separated by the interval of 8 time slot durations, can send the son grouping of other physical layer packet in these 8 time slot durations.If receive positive acknowledgement on forward link ARQ channel, then accessing terminal stop that transmission packets, and may be used to first son grouping of new physical layer packet transmission with the next subframe of that staggered offset.Access terminal and to continue the sub-transmission packets of physical layer packet, up to it or receiving positive acknowledgement on the forward link ARQ channel or it has sent whole 4 son groupings of physical layer packet in that is staggered.

Forward direction ARQ channel and forward direction D-ARQ channel are used for ACK and NAK sent to by the sector and access terminal.Forward direction ARQ channel and forward direction D-ARQ channel should send in 3 continuous time slot.

If the ARQ pattern is ' 0 ', then forward direction ARQ channel should be launched in the sector after first, second or the 3rd grouping that receives the reverse traffic channel transmitted in packets, if this sector is the part of the Serving cell on the forward channel, then use polar keying, promptly+1=＞ACK,-1=＞NAK, if this sector is not the part of Serving cell on the forward channel, then use the on-off keying of ACK guiding, promptly+1=＞ACK, 0=＞NAK, wherein the ARQ pattern is the public data of reverse traffic channel MAC agreement.

If the ARQ pattern is ' 1 ', then this sector should, use the on-off keying of ACK guiding, promptly+1=＞ACK, 0=＞NAK launches forward direction ARQ channel after first, second and the 3rd son grouping that receive the reverse traffic channel transmitted in packets.

This sector should be only when the active set size that accesses terminal be 1, just after the 4th son grouping that receives from the reverse traffic channel transmitted in packets that accesses terminal, by using the on-off keying of NAK guiding, be 0=＞ACK,-1=＞NAK launches forward direction ARQ channel, the number of the sub-district in the active set that the active set size that wherein, accesses terminal is defined as accessing terminal.

If the active set size that accesses terminal is greater than 1, then forward direction D-ARQ channel should not launched in the sector.Otherwise the sector should be by utilizing the on-off keying of NAK guiding, i.e. 0=＞ACK, and-1=＞NAK launches forward direction D-ARQ channel.For the reverse link traffic channel transmitted in packets that begins in time slot n-48, the sector should begin to launch forward link D-ARQ channel in time slot n.

About at time slot n, the ARQ message of the reverse traffic channel grouping that sends in the n+1, n+2 and n+3 should be at time slot n+8, sends in n+9 and the n+10.Should be about the D-ARQ message that the reverse traffic channel that begins to send in time slot n divides into groups at time slot n+48, send in n+49 and the n+50.

Forward link (FL) media interviews control (MAC) channel power distributes

As mentioned above, the forward link amplifier can provide limited gross output (P _PAM) and make through the amplifying signal distortion with can closing needs.As mentioned above, forward link comprises by time-multiplexed Traffic Channel, pilot channel and a plurality of MAC.Because forward link is always with P _PAMEmission, and many MAC, i.e. Reverse Activity bit (RAB) channel, power control channel (RPC) and confirm/deny that channel (ACK/NAK) is by code division multiplexing, so P _PAMComprise: the power (P that distributes to the RA channel _RACH), distribute to the power (P of RPC channel _RPCCH) and distribute to the power (P of ACK/NAK channel _ACK/NAK).

Fig. 4 is the flow chart that one embodiment of the present of invention are shown.Power division begins in step 400, and proceeds in step 402.In step 402, all users in the coverage of sub-district are by the series classification that increases progressively with required MAC channel power.Then, in step 404, the user is placed in the different gatherers based on required power division.If the required ARQ power of some users is identical, these users are classified by the order that the ratio (FL_SINR) with forward direction link signal and interference and noise successively decreases in step S406 so.

If distribute the total MAC channel power Tarq_req of available total MAC channel power Tarq less than all users' needs, this method proceeds to step 410 so, this step reduces to distribute to the power of the user in the highest gatherer of required ARQ power with predetermined increment, until reaching predetermined maximum decrease.In an exemplary embodiment, the power of distributing to the user in the prominent gatherer of required ARQ can be reduced predetermined increment, for example, reduces 1dB, maximum for example be decreased to for 3dB to greatest extent.This method proceeds to step 412 then.

In step 412, reduce the power division of required ARQ power with the user in tactic each gatherer that successively decreases until for that gatherer, reached predetermined maximum decrease with predetermined increment.In an exemplary embodiment, can for example be the predetermined increment of 1dB with minute matching the power reduction of the user in the given gatherer, maximum for example reduce for 3dB to greatest extent.The power division of user in tactic each gatherer that reduces to successively decrease with power demand is assigned to all gatherers or till Tarq is more than or equal to Tarq_req until available ARQ power.At step S414, if determine Tarq more than or equal to Tarq_req, this method finishes in step 416 so.Otherwise, repeating step S410 and 412 until Tarq more than or equal to Tarq_req.

If in step 406 based on required power division with the user collect (bin) get up after Tarq greater than Tarq_req, then in step 420, the sequencing table that successively decreases based on FL_SINR distributes for the starting power that accesses terminal, and priority is had the user of minimum FL_SINR.

If the sequencing table that successively decreases based on FL_SINR be access terminal starting power distribute after the MAC channel power be available, then in step 424 with the predetermined increment that can reach predetermined maximum recruitment at most ARQ channel starting power distribution for all active users.Active user can comprise non-server, not with BTS as Serving cell be not in soft handover user with the soft handover of BTS.In one embodiment, be that all non-servers, soft handover user's ARQ channel starting power is distributed the maximum 3dB that increases with the increment of 1dB.Determine in step 426 that then whether Tarq is greater than Tarq_req.If Tarq is greater than Tarq_req, then power as one man starts all users in step 428.Otherwise this method finishes in step 430.

In the flow chart of Fig. 5 A-5C, show the more detailed embodiment of the treatment step that is used for the distribution of forward link MAC channel power.Shown in the flow chart of Fig. 5 A, power distribution method begins in step 500 and continues in step 502.In step 502, the predetermined percentage of total MAC channel power for example 6% is assigned to the RAB channel.This method proceeds to step 504 then.

In step 504, the MAC channel power is assigned to the user's of old user and Xin RPC channel.Each user's RPC channel is assigned with a certain amount of power, the predetermined percentage of the no more than total MAC channel power of this a certain amount of power, for example, 3% of no more than total MAC channel power.The MAC channel power is also distributed to new user's data rate controlled locking (DRC locking) channel in an identical manner, that is, each new user's DRC lock channel is assigned with 3% of no more than total MAC channel power.Method proceeds to step 506.

In step 506, total RPC channel power distributes (Trpc) and total ARQ channel power to distribute (Tarq) to be determined.In one embodiment, determine the maximum power distribution (Max_rpc_alloc) of RPC channel according to following relation:

Max_rpc_alloc＝(Prpc，max*Overhead_softhandoff/Margin_rpc)*(#legacy+#new*(PC_Update_rate/600)*Overhead_drclock)

Wherein, Prpc, max are that every user's maximum RPC channel power distributes, and it is 3% of total MAC channel power in one embodiment,

Wherein, Overhead_softhandoff is a soft switching overhead, and it is the small active area size,

Wherein, Margin_rpc is power margin (power margin), and it is certain percentile proportionality factor (scaling factor) of the maximum power demand of distribution,

Wherein, #legacy is the number of old user in this sub-district,

Wherein, #new is the number of new user in this sub-district,

Wherein, PC_Update_rate is a power control renewal rate, and

Wherein, Overhead_drclock is new user's a DRC lock channel expense.

It is total required RPC channel power (Trpc_req) and the smaller of Max_rpc_alloc that total RPC channel power distributes (Trpc).Total ARQ channel power distribution T arq is given by following relational expression:

Tarq＝T-Trpc-Trab

Wherein, T is total MAC channel power, and Trpc is that total RPC channel power distributes, and Trab is the distribution of RAB channel power.

After total RPC channel power (Trpc) and total ARQ channel power (Tarq) were determined in step 506, this method proceeded to Fig. 5 B in step 508.

Fig. 5 B is the continuation of the flow chart of Fig. 5 A, and it begins in step 510, and proceeds to step 516.In step 516, only consider the user of non-soft handover.If in step 516, determine, sector of base station is to the decoding failure of the grouping after the 4th son grouping, wherein the 4th son grouping is the last son grouping in the grouping, whether the ratio (FL_SINR) of then determining forward link signal and interference and noise in step 518 greater than predetermined quantity, for example-and 2dB.If there is not non-soft handover user in this sub-district, then this method proceeds to step 524.

If in step 518, determine FL_SINR＞-2dB, so in step 520 with the power of predetermined quantity, for example-15dB distributes to non-soft handover user's the E-ARQ channel of decoding failure of each its 4th son grouping.Otherwise, in step 522 with the power of varying number, for example-12dB distributes to non-soft handover user's the E-ARQ channel of decoding failure of each its 4th son grouping.After step 520 or step 522 were finished, this method proceeded to step 524.

Then, consider all users who given BTS is considered as Serving cell.Order with FL_SINR is that the ARQ channel power distributes these user's classifications, and FL_SINR can obtain from data rate control (DRC) information in one embodiment.User with higher FL_SINR is classified into higher priority than the user with low FL_SINR.Then, this method is carried out the iteration of one or many from step 524 beginning, and wherein, integer M is configured to 0 at first.This method proceeds to step 526.

In step 526, the user of ARQ channel power after according to classification FL_SINR is assigned to these users.In one embodiment, the ARQ channel power is distributed to user after the classification according to following steps:

If A. FL_SINR＜-2-M (dB), then to user distribution-12dB

If B.-and 2-M (dB)＜FL_SINR＜2-M (dB), so to user distribution-15dB

If FL_SINR＞2-M (dB) C. is so to user distribution-18dB

In any step of above-mentioned steps A, B or C, there are not enough MAC channel powers to can be used for distributing if in step 528, determine, in step 530, M is added 1 so, and repeating step 526 is till all classified users are assigned to the ARQ channel power.After the ARQ channel power was assigned to all classified users, this method proceeded to step 532.

In step 532, system determines whether M＞0, whether is necessary that promptly iteration is more than once to distribute to the ARQ channel power all classified users.If M＞0, system is provided with marker bit in step 534 so, i.e. ARQ pattern, and after ARQ mode flag position is set up, the any new user that BTS obtains in the sector in step 536 will be in the OOK pattern, even this BTS is those new users' a Serving cell.This method finishes in step 537 then.

With reference to figure 5B, if determine that in step 538 M=0 has continued a predetermined number adjacent time slot T at least, for instance, if block length is 16 time slots then T is 16 or bigger, then system can cancel setting to ARQ mode flag position in step 540, and in step 542, in case the BTS sector becomes Serving cell, then the user of BTS acquisition just can set with bipolar mode.This method proceeds to Fig. 5 C in step 544 then.If M can not be maintained at 0 value place in the duration of T continuous slot in step 538, any new user of BTS acquisition will be in the OOK pattern in the step 536 so.

Fig. 5 C is the continuation of the flow chart of Fig. 5 B, step 546 representative graph 5B wherein, and this flow process proceeds to step 548.In step 548, system determines whether the MAC channel power is still available when M=0.If the MAC channel power is no longer available when M=0, then method finishes at step 550 place.Otherwise, in step 552, remaining MAC channel power can be distributed to classified soft handover user's forward link ARQ channel, wherein these classified soft handover users are not used as Serving cell to BTS, and these users successfully decode their grouping before the 4th son grouping, and the 4th son grouping is the last son grouping of each grouping.In one embodiment, these users with the order of their FL_SINR by classification.User with user lower FL_SINR than having of higher FL_SINR classifies higher priority as.The power of predetermined quantity, for example ,-9dB is assigned with each the forward link ARQ channel among these these users, till available MAC power is used up or till all these users are assigned to the ARQ channel power.

In step 554, determine whether still can get any remaining MAC channel power then.If no longer include available MAC channel power, then method finishes in step 556.If the MAC channel power is still available, then extra power division is given the ARQ channel of BTS being used as the non-switching user of serving sector in step 558.This distribution should from have and BTS between the user of minimum FL_SINR, and move towards the direction of user's FL_SINR incremental classification.This distribution should proceed to all non-switching users to have had-the ARQ channel power of 12dB till.If still having the MAC channel power can use, then remaining power is used to further optimize non-switching user's ARQ channel, feasible ARQ channel with user of minimum FL_SINR is upgraded to-9dB, continues then to do like this to having time low FL_SINR user, or the like.This process should proceed to all users in the sector all have been had-the FLARQ power of 9dB till.

After the ARQ channel power is distributed, determine whether that in step 560 still old any MAC channel power can use in step 558.Can use if no longer include the MAC channel power, then method finishes in step 562.If still available and existence other control channel required power except that RPC, DRCLock and ARQ channel of MAC channel power after step 560, then can in step 564, the MAC channel power be distributed to other control channel, and this method finishes in step 566 subsequently.

AT and AP structure

Illustrate among Fig. 6 and access terminal 600.Forward link signal is received and is passed to the front end 604 that comprises receiver by antenna 602.This receiver filtering, amplify, separate and be in harmonious proportion the signal that digitlization provides by antenna 602.This is provided for demodulator (DEMOD) 606 through digitized signal, and demodulator 606 provides through demodulated data for decoder 608.Decoder 608 is carried out the contrary of making at the place of accessing terminal of signal processing function and is handled, and will offer data sink 610 through the user data of decoding.Decoder is also communicated by letter with controller 612, to provide overhead data to controller 612.Controller 612 is further communicated by letter with comprising 600 other functional block of accessing terminal, so that the suitable control to 600 the operation of accessing terminal to be provided, for example, digital coding, power control.Controller 612 can comprise, for example, and processor and be connected to processor and comprise the storage medium of one group of executable instruction of processor.

Sending to the user data that accesses terminal is provided by data source 614, and the guide by controller 612 sends to encoder 616.Encoder 616 is further provided overhead data by controller 612.Data after 616 pairs of these data of encoder are encoded and will be encoded offer modulator (MOD) 618.Data processing in encoder 616 and the modulator 618 is to carry out according to the reverse link generative process of describing in above document and the accompanying drawing.Treated then data are provided for the reflector in the front end 604.Transmitter modulation, filtering, amplify this reverse link signal, and by antenna 602 via on reverse link, launching reverse link signal in the air.

Fig. 7 illustrates controller 700 and accesses terminal 702.The user data that data source 704 generates is via interface unit, and for example, packet network interface PSTN (not shown) offers controller 700.As described, controller 700 links to each other with accessing terminal of a plurality of formation access networks.(in Fig. 7, only show one for brevity and access terminal 702).User data is provided for a plurality of selector unit (only showing a selector unit 702 for brevity among Fig. 7).Selector unit 708 is assigned with and is used for the exchange of control data source 704 and data sink 706 and the user data between under the control of call control processor 701 and a plurality of base station.Call control processor 710 can comprise, for example, processor with link to each other with processor and comprise the storage medium of one group of executable instruction of processor.As shown in Figure 7, selector unit 702 provides user data to data queue 714, and this data queue 714 has comprised the user data that will send to by the (not shown) that accesses terminal of 702 services that access terminal.According to the control of scheduler 716, user data offers Channel Elements 712 by data queue 714.Channel Elements is according to IS-856 standard processes user data, and data processed is offered reflector 718.Data are launched on the forward link by antenna 722.

Reverse link signal from the (not shown) that accesses terminal is received at antenna 724 places, and is provided for receiver 720.Receiver 720 filtering, amplification, demodulation and this signal of digitlization, and will offer Channel Elements 712 through digitized signal.Channel Elements is carried out the contrary of doing in the access point place of signal processing function and is handled, and will offer selector unit 708 through the data of decoding.Selector unit 708 arrives data sink 706 with this user data delivery, and overhead data is delivered to call control processor 710.

Although it will be understood to those of skill in the art that for easy to understand, flow chart is to illustrate by successively order, and some step can executed in parallel in reality is implemented.

It will be apparent to one skilled in the art that any one that can utilize a plurality of different process and technology comes performance information and signal.For example, more than data, instruction, order, information, signal, bit, symbol and the chip that may be mentioned in the whole text can be by voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light territory or light particles in the explanation, or above combination in any shows.

The technical staff can further understand, different illustrative can combinations by electronic hardware, computer software or the two in conjunction with the described logic function block of embodiment disclosed herein, module, circuit and algorithm steps are realized.In order to clearly demonstrate the interchangeability of this hardware and software, more than usually according to they functional description different illustrative components, functional block, module, circuit and step.This function is to realize depending on application-specific and design constraints to whole system by hardware or software.Those of skill in the art can realize described function in a different manner for each application-specific, but the definite of this implementation method should not be interpreted as departing from protection scope of the present invention.

The combination that can be used for carrying out function described here with general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete nextport hardware component NextPort or its design realizes or carries out in conjunction with the described different illustrative logical blocks of disclosed embodiment, module and circuit.General processor can be a microprocessor, but substitute, this processor can be processor, controller, microcontroller or the state machine of any conventional.Processor also can be used as the combination of calculation element, for example, the combination of DSP and microprocessor, a plurality of microprocessors, one or more microprocessors that link to each other with the DSP core, or other this configuration is implemented arbitrarily.

The method of describing in conjunction with the disclosed embodiments or the step of algorithm can be directly in hardware, in the software module by processor operations, or realize in above the two the combination.Software module can reside in RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, moveable magnetic disc, CD-ROM or arbitrarily in other storage medium known in the art.An exemplary storage medium is connected on the processor, makes the processor can be from read information like this, or information is write on the storage medium.Alternatively, described storage medium can be integrated in the processor.Processor and storage medium can reside among the ASIC.ASIC can reside in the user terminal.Alternatively, processor and storage medium can be used as discrete assembly and reside in the user terminal.

The above-mentioned explanation of disclosed embodiment makes any those skilled in the art can make and use the present invention.Different modification to these embodiment is conspicuous to those skilled in the art, and under the situation that does not deviate from the spirit or scope of the present invention, the rule that is limited can be used other embodiment here.Therefore, the present invention does not plan to be limited to these embodiment described herein, but the wideest scope that requirement conforms to principle disclosed herein and novel feature.

The part of this patent file disclosure comprises content protected by copyright.In the time of in this patent appears at the patent document of trademark patent office or writes down, the owner of this copyright does not have objection to any facsimile copy of this patent file or this patent content, but the owner of other situation copyright keeps its all copyrights.

Claims (13)

1. give the distant station method that specific control channel distributes power for one kind, described method comprises:

A) with a plurality of series classifications of increasing progressively with required media interviews control MAC channel power of accessing terminal in a plurality of gatherers;

B) if two or more MAC channel powers that access terminal required equate the then described classification that accesses terminal that required MAC channel power is equated with forward direction link signal and order that interference and noise ratio FL_SINR successively decrease;

C) determine total available automatic repetitive requests ARQ power based on total MAC channel power, the gross power distributing to the gross power of reverse power control RPC channel and distribute to counter actuation blt RAB channel;

D) described total available ARQ power is compared with described total required ARQ power that accesses terminal; And

E) if according to step D), described total available ARQ power is less than described total required ARQ power that accesses terminal,

A) power that will distribute to the user in the gatherer in the middle of the prominent a plurality of gatherers of required ARQ reduces with predetermined increment, until reaching predetermined maximum decrease;

B) power that will distribute to the user in each gatherer in the remaining gatherer by the order of required ARQ power decay reduces with described predetermined increment, until reaching predetermined maximum decrease;

C) if described total available ARQ power less than described total required ARQ power, repeating step a) and b), till described total available ARQ power is more than or equal to described total required ARQ power.

2. the method for claim 1 wherein saidly determines that the step of total available ARQ power comprises, cuts the gross power of the described RPC of distributing to channel and the gross power of the described RAB of distributing to channel from described total MAC channel power.

3. the method for claim 1 also comprises:

F) if according to step D), described total available ARQ power is greater than described total required ARQ power that accesses terminal,

A) sequence starting of successively decreasing with FL_SINR is to the remaining power division that accesses terminal; And

B) start power division with predetermined increment, till reaching predetermined maximum recruitment to the ARQ channel that accesses terminal of all activities.

4. the method for claim 1, determine that wherein the described step of total available ARQ power comprises:

The first predetermined percentage of described total MAC channel power is distributed to described RAB channel in the sub-district; And

Give described RPC channel in the described sub-district with the second predetermined percentile power division that is not more than described total MAC channel power.

5. method as claimed in claim 4 also comprises:

Be the described total required ARQ power of all calculating that access terminal in the described sub-district;

Determine whether described accessing terminal comprises that one or more failing accesses terminal the non-switching of the packet decoding after the last son grouping of described grouping;

If described accessing terminal comprises that one or more failing accesses terminal the non-switching of the packet decoding after the described last son grouping, determine that whether each fail forward link signal that each non-switching with the packet decoding after the described last son grouping accesses terminal and interference and noise ratio FL_SINR greater than predetermined threshold;

If described FL_SINR is greater than described predetermined threshold, automatic repetitive requests E-ARQ channel allocation first predetermined power level of expansion of accessing terminal then for each described non-switching, wherein said non-switching access terminal and fail that the packet decoding after the described last son grouping and its are had FL_SINR greater than predetermined threshold; And

Otherwise give described E-ARQ channel allocation second predetermined power level.

6. method as claimed in claim 4, comprise that also remaining MAC channel power is distributed to all is used as described sub-district as the ARQ channel that accesses terminal of Serving cell, described remaining MAC channel power is to obtain cut the gross power of the gross power of the described RPC of distributing to channel and the described RAB of distributing to channel from described total MAC channel power after.

7. method as claimed in claim 6, wherein, described remaining MAC channel power is distributed to all described steps that the ARQ channel that accesses terminal of Serving cell is used as in described sub-district comprise:

According to each described FL_SINR that accesses terminal with all classifications according to the order of sequence that accesses terminal;

Digital M is arranged to 0 at first;

According to following steps, one that the ARQ channel power are distributed to appointment in a plurality of the accessing terminal that Serving cell is used as in described sub-district access terminal:

If a) FL_SINR＜-x-M, wherein x is a predetermined number, then the first predetermined ARQ channel power level is distributed to accessing terminal of described appointment;

B) if-x-M＜FL_SINR＜x-M, then the second predetermined ARQ channel power level is distributed to accessing terminal of described appointment; And

C) if FL_SINR＞x-M then distributes to accessing terminal of described appointment with the 3rd predetermined ARQ channel power level; And

If described remaining MAC channel power is used up, so M is added 1; And

Repeating step a)-c), till described remaining MAC channel power is assigned to all ARQ channels that access terminal of described sub-district being used as Serving cell.

8. method as claimed in claim 7 also comprises:

Described sub-district is used as after accessing terminal of Serving cell all be assigned to the ARQ channel power at all, is determined that whether M is greater than 0;

If M is greater than 0, then

Set ARQ mode flag position; And

One or more newly accessing terminal with the described sub-district acquisition of on-off keying OOK mode initialization.

9. method as claimed in claim 8 also comprises:

Determine whether M equals 0 in a predetermined number continuous slot;

If M equals 0 in a predetermined number continuous time slot, then

Cancellation is to the setting of described ARQ mode flag position; And

With one or more newly the accessing terminal of bipolar mode setting by the acquisition of described sub-district.

10. the described method of claim 9 also comprises:

All be assigned to the MAC channel power and M equals after 0 at all ARQ channels that access terminal that Serving cell is used as in described sub-district, determined whether that remaining MAC channel power can use; And

If all be assigned to the MAC channel power and M equals after 0 at all ARQ channels that access terminal that Serving cell is used as in described sub-district, also have remaining MAC channel power to use, then

Described remaining MAC channel power is distributed to the ARQ channel that one or more soft handovers access terminal, and described soft handover accesses terminal and described sub-district is not used as the last son grouping grouping before of the Serving cell and the described grouping of successfully having decoded.

11. method as claimed in claim 10, also comprise the described FL_SINR that accesses terminal according to each described soft handover with the classification according to the order of sequence that accesses terminal of described soft handover, wherein said soft handover access terminal described sub-district is not used as Serving cell and the described last son grouping of successfully having decoded before grouping.

12. method as claimed in claim 11, wherein, the predetermined electric power level according to described classification be assigned to described sub-district is not used as described Serving cell and the described last son grouping of successfully having decoded before the described ARQ channel that accesses terminal of the soft handover of grouping, until

All described sub-district is not used as described Serving cell and the described last son grouping of successfully having decoded before the described ARQ channel that accesses terminal of the soft handover of grouping, be assigned to till the MAC channel power,

Perhaps no longer include till the described remaining MAC channel power.

13. method as claimed in claim 12 also comprises:

Determine all described sub-district is not used as Serving cell and the described last son grouping of successfully having decoded before the described ARQ channel that accesses terminal of the soft handover of grouping be assigned to the MAC channel power after, whether also have remaining MAC channel power to use; And

If all described sub-district is not used as Serving cell and the described last son grouping of successfully having decoded before the described ARQ channel that accesses terminal of grouping be assigned to the MAC channel power after, also have described remaining MAC channel power to use, then described remaining MAC channel power is distributed to the ARQ channel that one or more non-switchings access terminal.

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