CN100456878C - Faster frame error detection in a CDMA network - Google Patents
Faster frame error detection in a CDMA network Download PDFInfo
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Abstract
Systems and methods for evaluating packets and frames in a wireless communication system having multiple reverse-link channels including a spontaneous, burst oriented transmission channel and its corresponding rate indicator channel. One embodiment comprises a base station monitoring the rate indicator channel, decoding the rate indicator channel using a maximum likelihood decoder and detecting the presence of a packet on the rate indicator channel by comparing a likelihood with a threshold, and analyzing the validity of a frame on the burst oriented channel based on the presence and content of packets received on the rate indicator channel.
Description
Require the priority under 35 sections 119 in U.S.
Present patent application requires in the provisional application the 60/448th of " Reverse link data communication " by name of submission on February 18th, 2003,269, the provisional application of submitting on March 6th, 2003 the 60/452nd that is called " method and apparatus of reverse link communication in the communication system ", 790 and the provisional application the 60/470th of " being used for the exterior ring power control of Rel.D " by name of submitting on May 14th, 2003,770 priority, these all provisional application are transferred to the application's assignee, and are quoted specially as reference at this.
Technical field
The present invention relates generally to field of telecommunications, particularly the mechanism of detection and evaluation of packets and frame transmission in the wireless communication system of many channels of channel quality with variation.
Background technology
Wireless communication technology is progressive rapidly, and wireless communication system is used to provide the increasing part of the message capacity that present user can use.Although compare with wired system, implementing to be faced with the supplementary technology obstacle aspect the wireless communication system, this is genuine really.For example, wireless communication system must be handled the problem that relates to the transfer of data between base station and the travelling carriage, so that the performance of maximization system, wired system does not then have this requirement.
One type of wireless communication system comprises honeycomb CDMA 2000 (code division multiple access) system, and this system is configured to support voice and data communication.This system has a plurality of base stations via wireless channel and a plurality of mobile communications.(this base station also connects various other systems via wired network usually, such as public switched telephone network.) each base station and the one group of mobile communications that is positioned at corresponding to sector of base station.This base station is responsible for detecting from the mistake of travelling carriage transmission, so as suitably the demodulation sign indicating number from the power of communicating by letter between the signal of travelling carriage, control base station and the travelling carriage so that minimise interference and maximize throughput and can make travelling carriage preserve energy and expansion time amount during it is operable thus.
Usually, Cyclic Redundancy Check is used to detect the mistake from the travelling carriage transmission.In theory, transmission is divided into predetermined length and by divided by fixed divisor.The remainder of this divide operations is moved platform and appends in the transmission.In case receive this transmission, the base station is recomputated remainder and it and the remainder of receiving is compared.If these two remainders do not match, then the base station detects the mistake of transmission.
Yet perhaps this error detecting method can not be used for some type transport channels.Burst oriented data transmission can have the rate corresponding indicator channel, and this rate corresponding indicator channel sends the emission format signal of burst oriented channel and driving power control ring to the base station.Although CRC can allow the error detection of transfer of data,, on their rate corresponding indicator channels, utilize the expense of CRC perhaps too big having fragmentary emission and being in the system of channel of burst type.In most of the cases, CRC need append to 8 to 10 bits on each transfer of data, yet on rate indicator channel, perhaps transmission itself only once comprises several bits.The transmission of the CRC bit that these are additional has obviously increased through-put power.This is problematic, because the base station still needs the high likelihood sign of the good and bad frame on this rate indicator channel, so that detect the adjustment that these strengthen the emission form of channel and are used for power control loop.
Therefore, in this field, need to allow the group character on rate indicator channel, and in rate indicator channel with corresponding spontaneous data transmission channel is first-class and the system and method for the high likelihood sign of bad frame.
Summary of the invention
Embodiment disclosed herein allows low expense ground reliable Detection and evaluation of packets and transmission frame by providing, and solves above-mentioned needs.
The rate indicator channel that some wireless communication systems have burst oriented channel and follow.It is desirable to provide the identification of the bad frame in the channel of low expense, high likelihood, rather than based on system's checked for errors of the unreasonable expense of carrying CRC.
Various embodiment of the present invention attempts in the system of the rate indicator channel that has spontaneous burst oriented data transmission and follow, and improves the estimation of detection of packets and frame.Particularly, analyze the existence of dividing into groups on the rate indicator channel, and, can determine the validity of one or more frames according to the existence of the grouping of this channel and the type that grouping exists.The existence of the data on the corresponding data transmission channel can also be used to confirming this judgement.
Embodiment is included in the method for evaluation of packets and frame in the wireless communication system with burst oriented channel and corresponding rate indicator channel, this method comprises uses maximum likelihood decoder decode rate indicator channel, and the existence of dividing into groups on rate indicator channel according to a likelihood detection.In one embodiment, rate indicator channel is decoded with predetermined space.Whether after detecting grouping, it is effective to determine this grouping to analyze this grouping.If this grouping be zero-speed rate grouping and be expect then whether detected energy on corresponding burst type data channel effective further to determine the grouping of zero-speed rate.If this grouping is not the grouping of zero-speed rate, then in this embodiment, can analyze the sub-packet identifier and the payload that contain in this grouping, if and they with the expectation inconsistent, then the information in this grouping can be used for the corresponding burst oriented channel of decoding, further to determine current group or whether effective in preceding grouping.Yet, do not expected if on rate indicator channel, detect grouping and do not divide into groups, can analyze the burst type data channel.Can on rate indicator channel, detect the validity of grouping and definite transmission frame in this way.
An alternate embodiments of the present invention comprises a wireless communication system, this system comprises base station and the travelling carriage that is connected the base station via wireless communication link, wherein the base station is configured to, on many reverse chain channels of the wireless communication link that comprises burst oriented channel and corresponding rate indicator channel, receive data from travelling carriage; And the base station is configured to, and uses maximum likelihood decoder decode rate indicator channel, and determines to be grouped on the rate indicator channel according to a likelihood and exist.In one embodiment, with predetermined space decode rate indicator channel.After detection of packets, can determine the validity of frame.If detect grouping, then analyze this grouping.If this grouping is the grouping of zero-speed rate and is expected, then detect the energy on the corresponding burst oriented channel, determine further whether this zero-speed rate grouping is effective.If this grouping is not zero-speed rate grouping, then can analyze the sub-packet identifier and the payload that comprise in this frame, if they are inconsistent with expectation, then the information of this grouping can be used for the corresponding burst oriented channel of decoding.Yet, if on rate indicator channel, detect grouping and not grouping do not expected energy that can test burst formula data channel.In this way, grouping can be on rate indicator channel, detected, and the validity of transmission frame can be determined.
A large amount of additional embodiment also is possible.
Description of drawings
Various aspects of the present invention and feature are also disclosed with reference to the accompanying drawings by following detailed description.
Fig. 1 is the schematic diagram of structure of the exemplary wireless communications systems of diagram one embodiment of the invention;
Fig. 2 is the block diagram of basic structural components of the wireless transceiver system of diagram one embodiment of the invention;
Fig. 3 is the schematic diagram of many channels between diagram travelling carriage of one embodiment of the invention and the base station;
Fig. 4 is the schematic diagram of a diagram general embodiment of the present invention, is used for detection of packets and estimation via rate indicator channel, determines the validity of the frame on rate indicator channel and the corresponding burst type data channel; With
To be diagram be used in combination with rate indicator channel and corresponding burst type data channel Fig. 5, so that the grouping on the detection rates indicator channel and estimate the method flow diagram of the validity of the frame on this channel.
Although the present invention has various modifications and alternative form, in accompanying drawing and the detailed description followed, shown specific embodiment of the present invention by way of example.Yet should be understood that drawings and detailed description are not to limit the invention to described specific embodiment.
Embodiment
One or more embodiment of the present invention is described below.Should be noted that hereinafter described these and any other embodiment are exemplary, and indication explanation rather than restriction the present invention.
As described, various embodiment of the present invention comprise the system and method that grouping error detection occurs in rate indicator channel and its corresponding data transmission channel is provided, and wherein utilize low expense that the high likelihood of error detection occurs is provided.
In order to help to understand following explanation, define or illustrate some terms here.Be grouped in discrete patch or a string bit that can be understood that message in the context of this explanation.Transmission frame (frame) can be understood to be in the transmission on the one or more channels of special time period.
In one embodiment, wireless communication system is provided for many reverse chain channels of the data communication from the travelling carriage to the base station.These channels comprise burst oriented transmission channel (also being called Traffic Channel here) and its corresponding rate indicator channel.In order to detect the existence that is grouped on the rate indicator channel, utilize maximum likelihood decoder to monitor and decode channel.According to the likelihood that receives specific cluster and the comparison of this likelihood and threshold value, can determine whether grouping exists.Use maximum likelihood decoder be for the conventional channel comparison, rather than on rate indicator channel, provide CRC information with grouping.
According to the detection of dividing into groups on the rate indicator channel, can estimate the validity of transmission frame.In addition in many cases, the information validity of helping estimate transmission frame on the corresponding burst oriented transmission channel.If on rate indicator channel, detect zero-speed rate grouping, and have enough energy on the data transmission channel, it can be asserted that bad transmission frame then.On the contrary, if having information on the grouping designation data transmission channel that detects on the rate indicator channel, but can not be correctly decoded data transmission channel, also it can be asserted that bad transmission frame then.
Although in this explanation with the linguistic context of CDMA 2000 reverse enhanced supplemental channel (R-ESCH) and the reverse rate indicator channel (R-RICH) followed, utilize the example embodiment of described system and method, but those skilled in the art will appreciate that embodiments of the invention also can be with other burst type communication channel and follow rate indicator channel to use.
The preferred embodiments of the present invention are implemented in the wireless communication system of a version that meets CDMA 2000 standards usually.CDMA 2000 is based on the third generation (3G) wireless communication standard of IS-95 standard.The CDMA2000 standard has developed and sustainable development, with the new business in the continuous support standard 1.25MHz carrier wave.The preferred embodiments of the present invention intention works in the system that utilizes CDMA2000 standard version D, but other embodiment also can be implemented on other version of CDMA2000 or meet other standard (for example, in system W-CDMA).Therefore embodiment described here should be considered to demonstration rather than restriction.
Referring to Fig. 1, shown the structure of the wireless communication system of demonstration among the figure.As shown in the figure, system 100 comprises and is configured to the base station 110 of communicating by letter with a plurality of travelling carriages 120.Travelling carriage 120 for example can be cell phone, personal information manager (PIM or PDA) or the analog that is arranged to radio communication.Should be noted that these devices do not need to be actually " moving ", and can be via Radio Link and base station 110 simple communication.Base station 110 is launched data via corresponding forward link (FL) channel to travelling carriage 120, and travelling carriage 120 is launched data via corresponding reverse link (RL) channel to base station 110.
Should be noted that the same term among the figure can have the reference marker of lowercase to represent with the back for open purpose, 120a for example, 120b etc.These terms can jointly only be quoted by reference marker.
Base station 110 also is connected to switching station 130 via Radio Link.Link to switching station 130 allows base station 110 and various other system units, as data server 140, public switched telephone network 150 or the Internet 160 communications.Should be noted that travelling carriage and system unit among the figure are demonstrations, and other system can comprise other type and other combination of device.
Although in fact, the particular design of base station 110 and travelling carriage 120 can significant change, and each all is used as the radio receiving-transmitting unit of communicating by letter on forward direction and reverse link.Therefore base station 110 has identical general structure with travelling carriage 120.This structure has been shown among Fig. 2.
Block diagram referring to the basic structural components of wireless transceiver system according to an embodiment of the invention shown in Figure 2.As shown in the figure, system comprises emission subsystem 222 and receiving subsystem 224, its each be connected to antenna 226.Emission subsystem 222 and receiving subsystem 224 can jointly be referred to as transceiver subsystem.Emission subsystem 222 and receiving subsystem 224 insert forward direction and reverse link via antenna 226.Emission subsystem 222 and receiving subsystem 224 be connection processing device 228 also, and processor 228 is configured to control and transmits and receives subsystem 222 and 224.Memory 230 is connected with processor 228, with working space and the local storage that processor is provided.Data source 232 is connected so that the system transmissions data to be provided with processor 228.Data source 232 for example can comprise the input of microphone or network equipment.Data are handled by processor 228, are transmitted to emission subsystem 222 then, and subsystem 222 is via antenna 226 emission data.The data that receiving subsystem 224 receives via antenna 226 are forwarded to processor 228 and handle, and forward data output 234 then to represent to the user.Data output 234 can comprise the device such as loud speaker, display or network equipment output.
The those of skill in the art in field of the present invention will be appreciated that structure shown in Figure 2 is an example, and other embodiment can use alternative arrangements.For example, can be some or all functions of the processor 350 of general purpose microprocessor, digital signal processor (DSP) or application specific processor other parts that can carry out transceiver, perhaps can carry out any other processing that transceiver needs.Therefore the scope of appended claim is not limited to customized configuration described here.
Be considered as the structure of the Fig. 2 that in travelling carriage, implements below, the parts of system can be counted as the transceiver subsystem of connection processing subsystem, wherein transceiver subsystem is responsible for receiving and the emission data via wireless channel, processing subsystem is responsible for preparing and is provided data being used for emission to transceiver system, and receives and handle the data that obtain from transceiver subsystem.Transceiver subsystem can be believed to comprise emission subsystem 222, receiving subsystem 224 and antenna 226.Processing subsystem can be believed to comprise processor 228, memory 230, data source 232 and data output 234.
As mentioned above, in fact the communication link between base station and the travelling carriage comprises different channels.Referring to the Fig. 3 that shows a plurality of channels between base station and the travelling carriage.As shown in the figure, base station 110 is launched data via one group of forward link channel 310 to travelling carriage 120.These channels generally include two Traffic Channels of emission data and the control channel of emissioning controling signal.Each Traffic Channel has the one or more control channels related with it usually.Forward link channel 310 can comprise, for example can be used for launching the forward fundamental channel (F-FCH) of low speed data, can be used at a high speed, the forward supplemental channel (F-SCH) of point-to-point communication, perhaps can be used for forward high-speed broadcast channel (F-HSBCH) to a plurality of recipient's broadcasts.These channels can also comprise Forward Dedicated Control Channel (F-DCCH), and forward broadcast control channel (F-BCCH) or Forward Paging Channel (F-PCH) can be used for launching the control messages about the others of Traffic Channel or system operation.
Travelling carriage 120 is launched data via reverse chain channel 320 to base station 110.In addition, these channels generally include Traffic Channel and control channel.Travelling carriage 120 can via such as Reverse Access Channel (R-ACH), expand the channel of Reverse Access Channel (R-EACH), reverse request channel (R-REQCH), reverse (R-ESCH), Reverse Dedicated Control Channel (R-DCCH), Reverse Common Control Channel (R-CCCH) or reverse rate indicator channel (R-RICH) to the base station data.
In many examples, reverse chain-circuit capacity is interference-limited.The base station is given travelling carriage available reverse link communication resources according to service quality (QoS) demand of different mobile stations, is used for effective utilization of maximize throughput.
The use of maximization reverse link communication resources comprises some factors.A factor of considering is the mixing from the modulated degree rl transmission of different mobile stations, and perhaps each travelling carriage experiences the channel quality that changes at any given time.In order to increase whole throughput (aggregate data of all travelling carriage emissions in the sub-district),, just wish that whole reverse link is fully utilized as long as there is reverse link data to be sent.In order to fill up (fill) active volume, the flank speed that some travelling carriages can be authorized to can support with them is visited.Before capacity was arrived, other travelling carriage can be authorized to visit.When which travelling carriage of decision scheduling, the base station can be considered the maximum rate that each travelling carriage can support, the transmission efficiency of travelling carriage, the data volume of the essential emission of each travelling carriage thus.Can select the more travelling carriage of high-throughput ability (considering the data volume of the essential emission of supported data rate of travelling carriage and travelling carriage), rather than select to support at present more another travelling carriage of high-throughput.
Another factor of considering is the service quality that each travelling carriage needs.It may allow to postpone to insert the specific travelling carriage that the channel (perhaps particularly, its throughput supported) of wishing travelling carriage will improve, rather than selects to support the more travelling carriage of high-throughput.Yet situation may be that the suboptimum travelling carriage may need to be authorized to visit, satisfies the professional minimum mass that guarantees so that allow to change travelling carriage.Therefore, perhaps the data throughout of actual schedule is not bare maximum, but can be according to channel condition, available transmission power of mobile station, business demand quality and the optimized data throughout of similar factor.
Various scheduling mechanisms can allow travelling carriage to launch data on reverse link.A classification of rl transmission comprises: accidental, burst oriented data transmission such as R-ESCH, and the rate indicator channel of following (R-RICH) of this channel.When R-ESCH in emission during data, R-RICH carries corresponding non-zero rate packet.This non-zero rate packet on the R-RICH is sent signal about the emission form on corresponding R-ESCH to the base station, sub-packet identifier and payload size are provided, driving power control ring when needing, and can be provided for the additional pilot energy of R-ESCH demodulation sign indicating number.
On the contrary, when R-ESCH was not sent out, R-RICH launched the grouping of zero-speed rate periodically, usually to launch this grouping such as anchor-frame circle of 80ms frame circle.The rate indicator grouping can have the length less than frame length (for example 10ms), so when only launching the grouping of zero-speed rate, the duty cycle of R-RICH may be less than 100%.
Travelling carriage can move in the zone of base station services, changes the power demand that R-ESCH goes up transfer of data thus.Zero-speed rate grouping is used to provide some information, with the driving power control ring and guarantee accurately and effectively transmission.If the holding power control ring then can not cancelled the transmission on the R-ESCH owing to inappropriate power, perhaps travelling carriage can utilize than transmission power demand more power, thereby has reduced its energy efficiency.
Because R-ESCH and R-RICH go up the discontinuous character of transmission, so the base station must determine when grouping exists on the R-RICH, and whether the transmission frame of definite R-RICH and its corresponding R-ESCH is effective.According to being used to row, do not need R-RICH, because the transmission on the data channel more or less is continuous, and the transformat of data channel is by known to the base station.In other words, can carry out the detection of Frame and the control of decoding and power ring basically based on data transmission channel itself.In native system, whether travelling carriage can determine to launch on R-ESCH and with what speed emission, the data rate that needs only on the R-ESCH is not higher than the speed that the base station is approved.Because the above-mentioned character of R-ESCH, data transmission channel (R-ESCH) and control channel (R-RICH) are all related to, thereby, therefore need to detect the existence of the grouping on the R-RICH and the validity of related transmission frame because the transmission on the corresponding R-RICH is discontinuous and the transformat of data channel is not known in the base station.
Fig. 4 has shown the flow chart of the method overview that is used for definite transmission frame validity of embodiment of the invention utilization.Usually, these methods can be used in conjunction with the corresponding rate indicator channel of spontaneous, burst oriented transmission channel (as R-ESCH) and data channel (as R-RICH that can its zero-speed rate grouping of emission on fixing and designated frame circle).In one embodiment, R-RICH is monitored (square frame 510), and maximum likelihood decoder is used to determine that the R-RICH that has monitored goes up exist (square frame 520) of grouping.According to the existence of grouping or do not exist and related condition, can determine on the R-RICH one or more transmission frames with and corresponding R-ESCH (square frame 530).
Forward the flow chart of method that Fig. 5 more detailed description is used for detecting the validity of the existence of dividing into groups on the channel and the frame that is associated now to.When monitoring R-RICH, the base station can be detected the existence of grouping by decoding R-RICH, with the likelihood (square frame 402) that generates each possible code word, and the likelihood and the threshold value of most probable code word are compared (square frame 404), according to this relatively, can determine at first whether grouping is present on the R-RICH.Can analyze lacking of this grouping or grouping then, to determine the validity of transmission frame.In one embodiment, the first step of the last grouping of detection R-RICH is with each frame circle (as 10ms frame circle) decoding R-RICH (square frame 402).Because R-RICH can utilize short block code, so maximum likelihood (ML) decoder can be used for identifying most probable code word (W) and R-RICH goes up the related likelihood (L) that this code word exists.The likelihood (L) of most probable code word (M) can be compared (square frame 404) with threshold value (Th) then.If the likelihood (L) of most probable code word (W) is greater than certain threshold value (L＞Th), then can determine to detect grouping on the R-RICH channel.Otherwise, can determine on the R-RICH of this frame channel, not detect grouping according to analysis.Although maximum likelihood decoder is well known in the art, and has been implemented as in the past successive bits stream has been distributed in likelihood, used maximum likelihood detector and determine on the discontinuous transmission channel that it is the technical scheme of novelty that grouping exists.In certain embodiments of the present invention, maximum likelihood decoder may be implemented as one group of correlator.
Referring to Fig. 5, go up determining of grouping according to the base station about R-RICH, can determine the validity of frame transmission.If the likelihood (L) of most probable code word (W) is greater than certain threshold level (L＞Th), can determine that then this grouping exists in R-RICH and goes up (square frame 404).If grouping exists on the R-RICH, then this grouping of base station subsequent analysis and definite R-RICH go up whether the grouping that detects is zero-speed rate grouping (square frame 406).If the base station is determined the grouping of zero-speed rate and is had (square frame 406) and do not expect zero-speed rate grouping (square frame 408), if for example divide into groups to the zero-speed rate in the time detecting that is different from particular frame circle, then can determine this frame invalid (square frame 424).On the contrary, if a base station zero-speed rate grouping of expectation (square frame 408), then it can be asserted that this frame has been a frame.In many examples, if (square frame 408) expected in the grouping of zero-speed rate, then the validity (square frame 422) of the further estimated frames of corresponding R-ESCH can be used in the base station.If on R-ESCH, detect enough energy, just determine to exist data (square frame 422), this and R-RICH go up the zero-speed rate grouping that detects and are not inconsistent (square frame 406), and because this contradiction, assert this frame invalid (square frame 426).Yet, if going up energy (square frame 422) that detects and the zero-speed rate that detects, corresponding R-RESCH divides into groups to conform to, asserted frame (square frame 428) on R-RICH.
If it is not zero-speed rate grouping (square frame 406) that the base station detects exist (square frame 404) and its of grouping, then can analyze the packet content (square frame 410) that is detected.This analysis (square frame 410) can be based on the predetermined timing that is used for synchronous incremental redundancy (SIR), and R-RICH goes up the predefined procedure of the sub-packet identifier (ID) in the transmission.In many examples, the grouping on the R-RICH comprises Sub-Packet ID and payload.When the grouping on the R-ESCH at first when travelling carriage 120 is transmitted into the base station, the grouping on the R-RICH comprises 0 Sub-Packet ID, if frame is received in the base station, then to travelling carriage 120 transmitting acknowledgement (ACK).If travelling carriage 120 is received ACK, then it will launch the new grouping that has 0 Sub-Packet ID on the R-ESCH.Yet if travelling carriage is not received ACK, travelling carriage can be retransmitted original packet and increase progressively Sub-Packet ID.This cycle lasts till that always travelling carriage 120 receives ACK from the base station.These Sub-Packet IDs (square frame 410) can be analyzed in the base station, with the validity of definite grouping that is detected.If the not contradiction that Sub-Packet ID and base station are expected, then it can be asserted that this frame has been frame (square frame 412).When Sub-Packet ID and contradicting that the base station is expected, then it can be asserted that this frame is a bad frame.If for example the base station sent ACK with forward direction travelling carriage 120, this may take place.The base station can expect that next Sub-Packet ID is 0, has the grouping that is not 0 Sub-Packet ID if receive the base station, then it can be asserted that bad frame.For with the travelling carriage that is in soft handover of a plurality of base station communications, even when the base station did not send ACK to travelling carriage in the past, but when receiving Sub-Packet ID and equaling 0 new grouping, the expectation contradiction not of new grouping and base station is also thought in the base station, because perhaps confirmed by other base station in preceding grouping.
In similar fashion, not zero-speed rate grouping (square frame 406) if the base station detects exist (square frame 404) and it of grouping, then can analyze the payload (square frame 410) of the grouping that is detected.For example, two R-RICH groupings of same decoder grouping are being expected to go up corresponding to R-ESCH in the base station perhaps, so that have same payload.If these expectations are satisfied (square frame 410), it can be asserted that have been frame, yet, then it can be asserted that have been bad frame if the payload of these groupings contradicts with the expectation of base station.If it can be asserted that all expectations of matched base stations of Sub-Packet ID and payload size then have been frames.
In many examples, when Sub-Packet ID or payload are not base stations when expecting (square frame 410), then R-ESCH goes up the validity that the information that exists is used to further estimate current R-RICH frame.Have suitable Sub-Packet ID and payload (square frame 410) if detect non-zero rate packet (square frame 404) on R-RICH, then the information of this grouping (payload size and the Sub-Packet ID) R-ESCH that can be used for decoding goes up the corresponding information (square frame 414) that exists.If the incorrect decoding of R-ESCH (square frame 416) is then indicated the information on the R-RICH perhaps inconsistent with the information of the R-ESCH of correspondence, and it can be asserted that is bad frame (square frame 420).Yet,, assert it has been frame (square frame 418) if be correctly decoded R-ESCH (square frame 416) based on the information that contains in the corresponding R-RICH grouping.In addition in this case, according to the contradiction between the current good frame and the incorrect expectation of deriving from one or more information that contain preceding grouping of R-RICH, it can be asserted that one or more on the R-RICH are bad (square frames 418) in preceding grouping.
Turn back to Fig. 5 top, if base station decodes R-RICH divides into groups with generation likelihood (square frame 402), and the likelihood of most probable code word (W) is less than certain threshold level (L＜Th), then can determine to exist on the R-RICH grouping (square frame 404).If the zero-speed rate grouping (square frame 430) on the R-RICH is being expected in the base station, then it can be asserted that is bad frame (square frame 432).On the contrary, if do not expect the grouping of zero-speed rate, then it can be asserted that be frame.
In many examples, if do not detect (square frame 404) grouping and do not expect zero-speed rate grouping (square frame 430) on R-RICH, then corresponding R-ESCH can be used for the validity of assisting in evaluating frame.If enough strong energy (inconsistent with the indication of R-RICH) is arranged on the R-ESCH, then assert it is bad frame (square frame 436).Yet,, it can be asserted that be frame (square frame 438) if energy level (square frame 434) is consistent with the R-RICH channel.
More than with specific embodiment various aspects of the present invention and feature have been described.Term described here " comprises " or its any other distortion is intended to be interpreted as the non-element or the restriction of following these terms that exclusively comprise.So, comprise that system, method or other embodiment of a group element is not limited only to these elements, but can comprise other element of clearly not listing, or other intrinsic element of the embodiment that is advocated.In addition, the step of disclosed method is not represented with particular order, and can exchange its order under the condition that does not deviate from the scope of the invention.
Those skilled in the art will appreciate that and to use different technology and technology to represent information and signal.For example, the data of above mentioning, instruction, order, information, signal, bit, symbol and chip can be represented with voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field or light particle or its any combination.
Those skilled in the art also will be appreciated that, in conjunction with the described various illustrative logical blocks of embodiment disclosed herein, module, circuit and algorithm steps, may be implemented as electronic hardware, computer software or both combinations.For the interchangeability of hardware and software clearly is described, hereinbefore usually according to the various illustrative components of its functional description, unit, module, circuit and step.No matter this function is implemented as hardware or software, all depend on the application-specific and the design constraint that put on whole system.Those skilled in the art can implement described function in the mode that each application-specific is changed, but this enforcement decision should not be interpreted as causing deviating from the scope of the invention.
Can implement or execution in order to lower member in conjunction with various illustrative logical blocks, module and circuit that embodiment disclosed herein describes: general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate logic OR transistor logic, discrete hardware components is perhaps for carrying out its combination that function described here designs.General processor can be a microprocessor, but in a replacement scheme, processor can be any conventional processors, controller, microcontroller or state machine.Processor can also be implemented as the combination of calculation element, for example combination of DSP and microprocessor, and a plurality of microprocessors, with one or more microprocessors that the DSP core combines, perhaps any other this configuration.
In conjunction with the described method step of embodiment disclosed herein or algorithm can be directly embedded in the hardware, by in the software module of processor operation or in both combinations.Software module can reside in the storage medium of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, movable disk, CD-ROM or any other form well known in the art.Exemplary storage medium can the connection processing device, so that processor can read information from storage medium, and information is write in the storage medium.In replacement scheme, storage medium is integrated in the processor.Processor and storage medium can reside among the ASIC.ASIC can reside in in the terminal.In replacement scheme, processor and storage medium can be used as discrete component and reside in the user terminal.
Disclosed embodiment can make or use the present invention in preceding explanation for those skilled in the art.All will be conspicuous to the various modifications of these embodiment for those skilled in the art, and under the condition that does not deviate from the spirit or scope of the present invention, Ding Yi General Principle can be applicable to other embodiment here.Therefore, the embodiment shown in the present invention does not plan to limit here, but consistent with the wide region that meets disclosed principle and novel features.
Claims (24)
1, a kind of in wireless communication system with burst oriented channel and corresponding rate indicator channel the method for evaluation of packets and frame, described method comprises:
Monitor described rate indicator channel; With
Determine the existence of the grouping on the described rate indicator channel according to the likelihood of maximum likelihood decoder generation;
Wherein, if detect described grouping, then analyze described grouping; Expected if do not divide into groups on the corresponding rate indicator channel and do not divide into groups, then detected the energy on the described burst oriented channel.
2, method according to claim 1 determines that wherein the existence of grouping is carried out with predetermined space.
3, method according to claim 2, wherein said interval is a sub-frame interval.
4, method according to claim 1, wherein analyze described grouping and also comprise: determine that whether described grouping is the grouping of zero-speed rate, and if described grouping be not the grouping of zero-speed rate, then analyze Sub-Packet ID and payload.
5, method according to claim 4, wherein analyze described grouping and also comprise: if described Sub-Packet ID and payload do not expected, then use the information on the packet decoding burst oriented data transmission.
6, method according to claim 1 is wherein analyzed described grouping and is comprised: Sub-Packet ID and the payload Sub-Packet ID and the payload size big or small and in preceding grouping of described grouping are compared.
7, method according to claim 1, wherein analyze described grouping and also comprise: if described grouping is the grouping of zero-speed rate, then the packet type with described grouping and expectation compares.
8, method according to claim 7 is wherein analyzed described grouping and is also comprised: if the packet type of described grouping and described expectation coupling then detects the energy on the burst type data channel.
9, the system of grouping and frame in a kind of evaluating wireless communication system comprises:
The base station; With
The travelling carriage that connects described base station via wireless communication link;
Wherein, described base station is configured to receive the data from described travelling carriage on a plurality of reverse chain channels on the described wireless communication link that comprises burst oriented channel and corresponding rate indicator channel; And
Wherein, described base station is configured to monitor described rate indicator channel, and determines the existence of the grouping on the described rate indicator channel according to the likelihood that maximum likelihood decoder generates;
Wherein said base station is configured to: if detect described grouping, then determine the validity of frame by analyzing described grouping; Expected if do not divide into groups on the corresponding rate indicator channel and do not divide into groups, then, determined the validity of frame by detecting the energy on the described burst oriented channel.
10, system according to claim 9 wherein determines existing of grouping with predetermined space.
11, system according to claim 10, wherein said interval is a sub-frame interval.
12, system according to claim 9, wherein said base station is configured to: whether by determining described grouping is the grouping of zero-speed rate, and if described grouping be not the grouping of zero-speed rate, then analyze Sub-Packet ID and payload, analyze described grouping.
13, system according to claim 12, wherein said base station also is configured to: if described Sub-Packet ID and payload do not expected, then, analyze described grouping by using the information on the described packet decoding burst oriented data transmission.
14, system according to claim 9, wherein said base station is configured to: compare by Sub-Packet ID and payload Sub-Packet ID and payload size big or small and in preceding grouping with described grouping, analyze described grouping.
15, system according to claim 9, wherein said base station is configured to: if described grouping is the grouping of zero-speed rate, then compare by the packet type with described grouping and expectation, analyze described grouping.
16, system according to claim 15, wherein said base station is configured to: if the packet type of described grouping and described expectation coupling then by detecting the energy on the described burst type data channel, is analyzed described grouping.
17, a kind of via radio communication channel operationally with the base station of mobile communications, wherein said base station comprises:
Processing subsystem; With
The transceiver subsystem that connects described processing subsystem;
Wherein, described transceiver subsystem is configured to, received signal on a plurality of reverse chain channels on the wireless communication link that comprises burst oriented channel and corresponding rate indicator channel; And
Wherein, described base station is configured to monitor described rate indicator channel, and determines the existence of the grouping on the described rate indicator channel according to the likelihood that maximum likelihood decoder generates;
Wherein said base station is configured to: if detect described grouping, then determine the validity of frame by analyzing described grouping; Expected if do not divide into groups on the corresponding rate indicator channel and do not divide into groups, then, determined the validity of frame by detecting the energy on the described burst oriented channel.
18, existing of grouping wherein determined with predetermined space in base station according to claim 17.
19, base station according to claim 18, wherein said interval is a sub-frame interval.
20, base station according to claim 17, wherein said base station is configured to: whether by determining described grouping is the grouping of zero-speed rate, and if described grouping be not the grouping of zero-speed rate, then analyze Sub-Packet ID and payload, analyze described grouping.
21, base station according to claim 20, wherein said base station also is configured to: if described Sub-Packet ID and payload do not expected, then, analyze described grouping by using the information on the described packet decoding burst oriented data transmission.
22, base station according to claim 17, wherein said base station is configured to: compare by Sub-Packet ID and payload Sub-Packet ID and payload size big or small and in preceding grouping with described grouping, analyze described grouping.
23, base station according to claim 17, wherein said base station is configured to: if described grouping is the grouping of zero-speed rate, then compare by the packet type with described grouping and expectation, analyze described grouping.
24, base station according to claim 23, wherein said base station is configured to: if the packet type of described grouping and described expectation coupling then by detecting the energy on the described burst type data channel, is analyzed described grouping.
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| CNB2004800073878A Expired - Lifetime CN100441009C (en) | 2003-02-18 | 2004-02-18 | Outer-loop power control for wireless communication systems |
| CN200480009878.6A Expired - Lifetime CN1774885B (en) | 2003-02-18 | 2004-02-18 | Method, apparatus and system for scheduled and autonomous transmission and acknowledgement |
| CNB2004800044752A Expired - Fee Related CN100456878C (en) | 2003-02-18 | 2004-02-18 | Faster frame error detection in a CDMA network |
| CN 200480007388 Expired - Fee Related CN100579314C (en) | 2003-02-18 | 2004-02-18 | Systems and methods for performing outer loop power control in wireless communication systems |
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| CNB2004800073878A Expired - Lifetime CN100441009C (en) | 2003-02-18 | 2004-02-18 | Outer-loop power control for wireless communication systems |
| CN200480009878.6A Expired - Lifetime CN1774885B (en) | 2003-02-18 | 2004-02-18 | Method, apparatus and system for scheduled and autonomous transmission and acknowledgement |
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| JP4472713B2 (en) * | 2006-06-19 | 2010-06-02 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile station apparatus, transmission method, and mobile communication system |
| CN101473566B (en) * | 2006-06-22 | 2013-01-30 | 三星电子株式会社 | Method and apparatus for transmitting scheduling requests in mobile communication system |
| CN101282507B (en) * | 2007-04-05 | 2011-07-20 | 中兴通讯股份有限公司 | System and method for transmission of data |
| EP2177073B1 (en) * | 2007-08-03 | 2023-07-19 | Wireless Future Technologies Inc. | Mobile station aggregation of acknowledgments and negative acknowledgments in wireless networks |
| CN101426271B (en) * | 2007-10-29 | 2011-08-10 | 电信科学技术研究院 | Method and system for channel configuration |
| US9072102B2 (en) * | 2007-11-27 | 2015-06-30 | Qualcomm Incorporated | Interference management in a wireless communication system using adaptive path loss adjustment |
| US8665801B2 (en) * | 2008-01-08 | 2014-03-04 | Alcatel Lucent | Allocating forward link resources for transmitting data over a shared forward link data channel without allocating reverse link resources for reverse link data transmission |
| US8995559B2 (en) * | 2008-03-28 | 2015-03-31 | Qualcomm Incorporated | Signaling message transmission in a wireless communication network |
| US8428109B2 (en) * | 2009-01-21 | 2013-04-23 | Via Telecom Inc. | Adaptive acknowledging and power control |
| CN102026258B (en) * | 2009-09-22 | 2014-08-13 | 中兴通讯股份有限公司 | Method and device for controlling raise over thermal |
| CN102376306B (en) * | 2010-08-04 | 2013-01-23 | 华为技术有限公司 | Method and device for acquiring level of speech frame |
| US10673674B2 (en) * | 2017-07-12 | 2020-06-02 | Qualcomm Incorporated | Techniques and apparatuses for multiplexing schemes for millimeter wave downlink single carrier waveforms |
| CN115835127B (en) * | 2022-11-24 | 2023-08-01 | 东土科技(宜昌)有限公司 | Method, device, computer equipment and storage medium for positioning target in chemical plant |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN100579314C (en) | 2010-01-06 |
| CN1751531A (en) | 2006-03-22 |
| CN1762169A (en) | 2006-04-19 |
| UA89024C2 (en) | 2009-12-25 |
| CN1762119A (en) | 2006-04-19 |
| CN1762174A (en) | 2006-04-19 |
| CN1774885A (en) | 2006-05-17 |
| UA84865C2 (en) | 2008-12-10 |
| CN100441009C (en) | 2008-12-03 |
| CN1774885B (en) | 2015-07-22 |
| UA86761C2 (en) | 2009-05-25 |
| UA89162C2 (en) | 2010-01-11 |
| UA92131C2 (en) | 2010-10-11 |
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