CN101390323A

CN101390323A - Method and apparatus for arranging packets in sub-slots in wireless communication

Info

Publication number: CN101390323A
Application number: CNA2007800062504A
Authority: CN
Inventors: N·布尚; T·卡道斯; M·范; 魏永斌
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2006-02-21
Filing date: 2007-02-21
Publication date: 2009-03-18
Also published as: CN101390324B; CN101385246B; CN101390328A; CN101385272A; CN101390324A; ES2357161T3; CN101385246A; CN101385271A; CN101595698A; CN101385272B

Abstract

Techniques for efficiently sending and receiving data in a wireless communication system are described herein. The techniques utilize a slot structure that is backward compatible with existing design. The techniques include sending and receiving forward link packets that occupy less than a full slot of the slot structure. An output waveform, which includes at least one slot, is generated at an access point. Each slot is segmented into two half-slots, wherein at least one half-slot includes a data unit of a packet. At a terminal, the output waveform is received and processed to extract the data unit and the data unit is processed to determine whether it is accurate. The terminal also generates ACK/NACK information in response to the results of processing the data unit and transmits channel information including the ACK/NACK information. The access point interprets the ACK/NACK information to determine if the data unit should be resent.

Description

Be used in the sub-slots of radio communication, arranging the method and apparatus of grouping

Require priority based on 35U.S.C. § 119

Present patent application has required to be called in the name that on February 21st, 2006 submitted to the provisional application No.60/775 of " WirelessCommunication System and Method ", 443 and name be called the provisional application No.60/775 of " DOCommunication System and Method ", 693 and the provisional application No.60/785 that is called " QUALCOMM Proposal for 3 GPP2 Air InterfaceEvolution Phase 2 " in the name that on March 24th, 2006 submitted to, 971 priority, above provisional application is transferred to the application's assignee, incorporates it into this paper clearly by reference.

Technical field

The disclosure is usually directed to communication, more specifically, relates to the transmission technology of wireless communication system.

Background technology

Wireless communication system is widely used provides various communication services, for example voice, video, grouped data, a message, broadcasting or the like.These systems can be multi-address systems, and it can support a plurality of users by sharing available system resources.The example of this multi-address system comprises: code division multiple access (CDMA) system, time division multiple access (TDMA) system, frequency division multiple access (FDMA) system, quadrature FDMA (OFDMA) system and Single Carrier Frequency Division Multiple Access (SC-FDMA) system.

Multi-address system can adopt one or more multiplexing schemes, such as code division multiplexing (CDM), Time Division Multiplexing etc.Can adopt this system, and this system service is in existing terminal.These multi-address systems generally include a plurality of groupings, and described a plurality of being grouped in takies one or more time slots when transmitting.Desired is in the back compatible that keeps existing terminal, to improve systematic function.For example, desired is that the space technology of employing such as multiple-input and multiple-output (MIMO) and space division multiple access (SDMA) improves throughput and/or reliability by utilizing by means of the additional space dimension of using a plurality of antennas to provide.

Therefore, exist in the prior art for the demand that can support to take the transmission technology a plurality of groupings, that be used for forward link packets that is less than a conventional time slot.In addition, there is for can be in the back compatible that keeps existing terminal the demand of the transmission technology of support space technology.

Summary of the invention

At this technology that transmits and receive data has effectively been described in wireless communication system.Described technology has been utilized the structure of time slot of the existing design of back compatible.Described technology comprises transmission and receives the forward link packets that is less than a complete time slot that takies in this structure of time slot.Described technology also optionally utilizes OFDM (OFDM) to come support space technology and/or other ACTs effectively.

According to an aspect, access point comprises receiver, at least one processor, the transmitter that is coupled to the memory of described at least one processor and is used to launch output waveform.Described receiver is used for from the distant station receiving channel information, and described channel information comprises ACK/NACK (confirming/deny) information.Described at least one processor is used to generate the output waveform that comprises at least one time slot.Each time slot is divided into two half cracks, and wherein, at least one half crack comprises the data cell of grouping.And described at least one processor also is used to explain described ACK/NACK information, to determine whether and described data cell resend described distant station.

According to another aspect, the transmitter that terminal installation comprises at least one processor, is coupled to the memory of described at least one processor and is used to launch the channel information that comprises ACK/NACK information.Described at least one processor is used to handle the input waveform that comprises at least one time slot.Each time slot is divided into two half cracks, and wherein, at least one half crack comprises the data cell of grouping.Described at least one processor also is used for the processing said data unit determining whether described data cell is correct, and in response to the result of processing said data unit, generates ACK/NACK information.

According to another aspect, a kind of communication system comprises aforesaid access point and terminal, and described access point and terminal communicate with one another with the described output waveform of transmission in forward link, and transmits described ACK/NACK information in reverse link.

According to another aspect, a kind of method is included in access point and generates output waveform.Described output waveform comprises at least one time slot.Each time slot is divided into two half cracks, and wherein, at least one half crack comprises the data cell of grouping.This method also is included on the terminal handles described output waveform, extracting described data cell, and the processing said data unit, to determine whether described data cell is correct.Described terminal also in response to the result of processing said data unit, generates ACK/NACK information, and emission comprises the channel information of described ACK/NACK information.This method also is included in explains described ACK/NACK information on the access point, to determine whether resending described data cell.

Various aspects of the present disclosure and feature have below been described in more detail.

Description of drawings

Fig. 1 shows HRPD (high rate packet data) (HRPD) communication system;

Fig. 2 shows the single carrier structure of time slot of supporting CDM;

Fig. 3 A shows the single carrier structure of time slot of supporting OFDM;

Fig. 3 B shows the single carrier structure of time slot of supporting CDM and OFDM;

Fig. 4 shows the single carrier structure of time slot of supporting CDM;

Fig. 5 shows the multi-carrier time slot structure of supporting CDM and OFDM;

Fig. 6 shows another multi-carrier time slot structure of supporting CDM and OFDM;

Fig. 7 shows the structure of time slot of supporting CDM and OFDM;

Fig. 8 shows the structure of time slot that is supported in the OFDM in the 5MHz spectrum allocation may;

Fig. 9 shows the block diagram of access point and terminal;

Figure 10 shows the design of emission (TX) CDM/OFDM processor;

Figure 11 shows another design of TX CDM/OFDM processor;

Figure 12 shows the design of reception (RX) CDM/OFDM processor;

Figure 13 shows another design of RX CDM/OFDM processor;

Figure 14 A shows the transmitted in packets of conventional complete time slot packet oriented protocol;

Figure 14 B shows the transmitted in packets according to the use half crack packet oriented protocol of the embodiment of the invention;

Figure 15 shows the various order of modulation with respect to payload size and number of retries;

Figure 16 shows with respect to payload size and number of retries, the various data rates that can realize;

Figure 17 shows the block diagram of access point and terminal;

Figure 18 shows the processing that sends and receive the grouping of half crack.

Embodiment

Transmission technology described herein can be used for various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA and SC-FDMA system.Term " system " and " network " often exchange use.Cdma system can be realized the wireless communication technology such as cdma2000, general land wireless access (UTRA), evolution UTRA (E-UTRA) or the like.Cdma2000 has been contained IS-2000, IS-95 and IS-856 standard.UTRA comprises broadband-CDMA (W-CDMA) and low spreading rate (LCR).Tdma system can be realized the wireless communication technology such as global system for mobile communications (GSM).The OFDMA system can realize such as Long Term Evolution (LTE), IEEE802.20,

Deng and so on wireless communication technology.In document, UTRA, E-UTRA and LTE have been described from " third generation partner plan " tissue (3GPP) by name.In document, cdma2000 has been described from " third generation partner plans 2 " tissue (3GPP2) by name.Wireless communication technology that these are different and standard are known in the art.

For the sake of clarity, below at HRPD (high rate packet data) (HRPD) system that realizes IS-856, the various aspects of described technology are described.HRPD is also referred to as Evolution-Data Optimized (EV-DO), data-optimized (DO), high data rate (HDR) or the like.Term HRPD and EV-DO often exchange use.At present, HRPD revised edition (revision) 0, A and B standardization, HRPD revision 0 and A are used, and HRPD revision C develops.HRPD revision 0 and A have been contained single carrier HRPD (1x HRPD).HRPD revision B has been contained multicarrier HRPD, and back compatible HRPD revision 0 and A.Technology described herein can be incorporated in any HRPD revised edition.For the sake of clarity, in the major part of following explanation, used the HRPD technology.

Fig. 1 shows the HRPD communication system 100 with a plurality of access points 110 and a plurality of terminal 120.The fixed station that access point normally communicates with terminal is also referred to as base station, Node B or the like.Each access point 110 provides the communication to the specific geographical area to cover, and support is positioned at the communication of the terminal of this overlay area.Access point 110 can be coupled to system controller 130, and these access points are coordinated and controlled to this system controller 130.System controller 130 can comprise the network entity such as base station controller (BSC), Packet Control Function (PCF), packet data serving node (PDSN) etc.

Terminal 120 can be dispersed in the whole system, and each terminal can be static or move.Terminal also is called as and accesses terminal, mobile radio station, subscriber equipment, subscriber unit, stands or the like.Terminal can be cell phone, PDA(Personal Digital Assistant), wireless device, handheld device, radio modem, laptop computer or the like.Terminal can be supported any HRPD revised edition.In HRPD, terminal can receive transmission on the forward link from an access point at any given time, and the transmission on the reverse link can be sent to one or more access points.Forward link (or down link) refers to the communication link from the access point to the terminal, and reverse link (or up link) refers to the communication link from the terminal to the access point.

Fig. 2 shows the single carrier structure of time slot 200 of supporting CDM on the forward link in HRPD.The transmission time line is divided into a plurality of time slots.Each time slot has the duration of 1.667 milliseconds (ms), and has crossed over 2048 chips.For the spreading rate of 1.2288 million chips/sec (Mcps), each chip has the duration of 813.8 nanoseconds (ns).Each time slot is divided into two identical half cracks.Each half crack comprises: (i) expense section, and it is by forming at the pilot of this half crack centre with in two media interviews controls (MAC) section of these pilot both sides; And (ii) in two traffic segment of these expense section both sides.Traffic segment is also referred to as traffic channel segments, data segment, data field or the like.Pilot carries pilot tone, and has the duration of 96 chips.Each MAC section is carried signaling (for example, reverse power control (RPC) information), and has the duration of 64 chips.Each traffic segment is carried business datum (for example, being used for the unicast data of particular terminal, broadcast data or the like), and has the duration of 400 chips.

HRPD revision 0, A and B use CDM at the data that send in traffic segment.Traffic segment can be carried the CDM data of one or more terminals that access point serving.The business datum of each terminal can be based on being handled by determined coding of the channel feedback that is received from this terminal and modulation parameter, to generate data symbol.Can carry out demultiplexing to the data symbol of one or more terminals, and utilize the Walsh function of 16-chip or Walsh sign indicating number to come the data symbol is covered (cover), to generate the CDM data of traffic segment.Thereby, use the Walsh function in time-domain, to generate the CDM data.The CDM traffic segment is the traffic segment of carrying the CDM data.

What can expect is for the data that send in traffic segment, to use OFDM and/or single carrier frequency division multiplexing (SC-FDM).OFDM and SC-FDM are divided into a plurality of orthogonal sub-carriers with available bandwidth, and described orthogonal sub-carriers is also referred to as tone, frequency district (bin) etc.Each subcarrier-modulated has data.Usually, in frequency domain, utilize OFDM to send modulation symbol, in time domain, utilize SC-FDM to send modulation symbol.OFDM and SC-FDM have specific desired characteristic, for example, are easy to resist because the ability of the intersymbol interference (ISI) that frequency selective fading caused.OFDM can also support MIMO and SDMA effectively, and MIMO and SDMA can be applied to each subcarrier independently, and can provide good performance thus in frequency-selective channel.For the sake of clarity, below describe use OFDM and sent data.

What can expect is when keeping back compatible HRPD revision 0, A and B, to support OFDM.In HRPD, pilot and MAC section can be carried out demodulation by all active terminal all the time, and traffic segment only can be carried out demodulation by just serviced terminal.Therefore, by keeping pilot and MAC section and revising traffic segment, can realize back compatible.Can be 400 or the given 400-chip traffic segment of one or more OFDM symbolics of chip still less by utilizing its duration, in the HRPD waveform, send the OFDM data.

Fig. 3 A shows the single carrier structure of time slot 300 of supporting OFDM in HRPD.For simplicity, in Fig. 3 A, only show a half crack.This half crack comprises: (i) expense section, and it is by forming at the 96-chip pilot of this half crack centre with in two 64-chip MAC sections of these pilot both sides; And (ii) in two traffic segment of these expense section both sides.Usually, each traffic segment can be carried one or more OFDM symbols.In the example shown in Fig. 3 A, each traffic segment is carried two OFDM symbols, and each OFDM symbol has the duration of 200 chips, and sends in the OFDM of one 200 chip symbol period.

Fig. 3 B shows the single carrier structure of time slot 302 of supporting CDM and OFDM in HRPD.The half crack comprises: (i) expense section, and it is made up of 96-chip pilot and two 64-chip MAC sections; And (ii) in two traffic segment of these expense section both sides.In a design, can select CDM or OFDM for each traffic segment.In this design, if selected CDM, then each traffic segment can be carried the CDM data, if selected OFDM, then each traffic segment can be carried one or more OFDM symbols.In other designs, traffic segment can be carried CDM data and OFDM data.For example, traffic segment can be carried the CDM data in half of this traffic segment, carries one or more OFDM symbols in second half of this traffic segment.

Usually, the OFDM symbol can generate based on various OFDM symbol numerology (symbolnumerology) technology or design.Every kind of OFDM sign digit learns a skill and is associated with the occurrence of relevant parameter such as OFDM symbol duration, number of subcarriers, circulating prefix-length.The OFDM symbol duration should be the integer divisor of the traffic segment of 400-chip, so that utilize traffic segment fully.In addition, the sample rate of OFDM symbol should be the integral multiple of the spreading rate of CDM data, so that be reduced at the processing on access point and the terminal.

Table 1 has been listed three kinds of example OFDM sign digits that are used for HRPD and has been learned a skill.Can select these numerology technology, with HRPD structure of time slot and spreading rate compatibility, thereby make: (i) in traffic segment, send the OFDM symbol of integer amount, and (ii) the sample rate of OFDM symbol is the integral multiple of the spreading rate of CDM data.Can also select the numerology technology, allow to realize effective generation of OFDM symbol for use in the total number of sub-carriers amount of determining discrete Fourier transform (DFT) (DFT) size.For these numerology technology, the total number of sub-carriers amount is not 2 power, but has less prime factor.For example, use prime factor 2,3,3 and 5, can obtain 90 subcarriers.Less prime factor can allow to realize effective mixed radix fast Fourier transform (FFT), to generate the OFDM symbol.Can realize that in the numerology technology shown in the table 1 the OFDM data embed in the HRPD forward link waveform effectively.

Table 1

Parameter	Conventional OFDM sign digit learns a skill 1	Conventional OFDM sign digit learns a skill 2	Conventional OFDM sign digit learns a skill 3	Unit
Parameter	Conventional OFDM sign digit learns a skill 1	Conventional OFDM sign digit learns a skill 2	Conventional OFDM sign digit learns a skill 3	Unit	Sample rate	1.2288×n	1.2288×n	1.2288×n	Msps
Number of subcarriers	90×n	180×n	360×n		Sample rate	1.2288×n	1.2288×n	1.2288×n	Msps
Number of subcarriers	90×n	180×n	360×n		Subcarrier spacing	13.65333...	6.82666...	3.41333...	KHz
Available part	90 (73.2421875μs)	180 (146.484375μs)	360 (292.96875μs)	Chip	Subcarrier spacing	13.65333...	6.82666...	3.41333...	KHz
Available part	90 (73.2421875μs)	180 (146.484375μs)	360 (292.96875μs)	Chip	Circulating prefix-length	7.5 (≈6.10μs)	16 (≈13.02μs)	36 (≈29.30μs)	Chip
The guard time of windowing	2.5 (≈2.03μs)	4 (≈3.26μs)	4 (≈3.26μs)	Chip	Circulating prefix-length	7.5 (≈6.10μs)	16 (≈13.02μs)	36 (≈29.30μs)	Chip
The guard time of windowing	2.5 (≈2.03μs)	4 (≈3.26μs)	4 (≈3.26μs)	Chip	The OFDM symbol duration	100 (≈81.38μs)	200 (≈162.76μs)	400 (≈325.52μs)	Chip

During OFDM sign digit in the table 1 learns a skill any one may be used to the CDM data in the OFDM data replacement traffic segment.These OFDM sign digits learn a skill to provide for the different of Doppler's expansion and multidiameter tolerance limit and trade off.Compare with 3 with numerology technology 2, numerology technology 1 has maximum subcarrier spacing and the shortest Cyclic Prefix.Therefore, numerology technology 1 can provide better doppler tolerance (because bigger subcarrier spacing) and can be cost with lower delay tolerance (because short Cyclic Prefix), realizes higher spectrum efficiency in the vehicle-mounted channel of high speed.Compare with 2 with numerology technology 1, numerology technology 3 has minimum subcarrier spacing and the longest Cyclic Prefix.Therefore, numerology technology 3 can have lower doppler tolerance (because less subcarrier spacing) but have higher delay tolerance (because long Cyclic Prefix), this just can realize higher spectrum efficiency existing under the big multidiameter situation of (such as, the delay of being introduced by transponder).

Other OFDM sign digits can also be learned a skill and be used for traffic segment.Usually, can select the OFDM sign digit to learn a skill, thereby make: (i) OFDM symbol duration and sample rate respectively with HRPD time slot format and spreading rate compatibility, and (ii) the DFT size allows to realize that effective OFDM symbol generates.Therefore, this just can allow the mode with effective and back compatible, utilizes the OFDM data to substitute CDM data in the HRPD forward link waveform.In each traffic segment, can optionally utilize the OFDM data to substitute the CDM data.Can keep the expense section for back compatible.

In a design, use fixing OFDM sign digit to learn a skill for all traffic segment of carrying the OFDM data.Terminal can priori know that this OFDM sign digit learns a skill, and can be under not about the situation of any signaling of this numerology technology the demodulating ofdm data.

In another design, use configurable OFDM sign digit to learn a skill to the given traffic segment of carrying the OFDM data.Can support set of number learn a skill (for example, in table 1 listed those).Can use different digital to learn a skill to different terminals.Can come based on the channel conditions of each terminal to select suitable numerology technology for this each terminal.For example, can use numerology technology 1, can use numerology technology 3, and can use numerology technology 2 terminal with the expansion of medium speed and/or medium multidiameter to terminal with big multidiameter expansion to the terminal of advancing at a high speed.

Fig. 4 shows the multi-carrier time slot structure 400 of supporting CDM in HRPD.In HRPD revision B, can in frequency domain, carry out a plurality of 1x HRPD waveforms multiplexing, to obtain to fill the multicarrier HRPD waveform of given spectrum allocation may.In the example shown in Fig. 4, in the spectrum allocation may of 5MHz, three 1xHRPD waveforms that are used for three

HRPD carrier waves

1,2 and 3 are carried out channeling.The all corresponding different carrier of each 1xHRPD waveform and generating, and taken about 1.25MHz.These three 1xHRPD waveforms have taken about 3 * 1.25=3.75MHz, and this has just kept relatively large safe bandwidth on two edges of 5MHz spectrum allocation may.Interval between the adjacent carrier is not to specify in HRPD, but can select usually, so that provide less transition band between adjacent 1xHRPD waveform.

As shown in Figure 4, multicarrier HRPD waveform has comprised three expense sections and six traffic segment that are used for these three carrier waves in each half crack.As shown in Figure 4, each traffic segment can be carried the CDM data.Can optionally utilize the OFDM data to substitute CDM data in each traffic segment in multicarrier HRPD waveform.In addition, traffic segment in the multicarrier HRPD waveform and expense section can be arranged and effectively utilize this spectrum allocation may.

Fig. 5 shows the multi-carrier time slot structure 500 of supporting CDM and OFDM in HRPD.In the example depicted in fig. 5, in the spectrum allocation may of 5MHz, send three HRPD carrier waves, and the interval of these three HRPD carrier waves is closer to each other as much as possible, so that improve bandwidth availability ratio.For each HRPD carrier wave, each half crack comprises: (i) expense section, and it is made up of pilot and MAC section, and (ii) in two traffic segment of these expense section both sides.HRPD carrier wave 1 is included in traffic segment (TS) 1a and the 1b on expense section left side and right side, and HRPD carrier wave 2 is included in the traffic segment 2a and the 2b on expense section left side and right side, and HRPD carrier wave 3 is included in the traffic segment 3a and the 3b on expense section left side and right side.Each traffic segment of each HRPD carrier wave can be carried CDM data or OFDM data.

For the 3-carrier wave HRPD in 5MHz distributes, as shown in Figure 5, can generate the OFDM symbol with sample rate corresponding to 4 * 1.2288=4.9152Mcps of n=4.So the OFDM symbol can take the major part of 5MHz spectrum allocation may.Perhaps, can generate the OFDM symbol with the sample rate corresponding to 3 * 1.2288=3.6864Mcps of n=3, this is not shown in Fig. 5.

Can be that each OFDM symbol period generates the OFDM symbol in service interval (interval).Learn a skill 2 for the OFDM sign digit in the table 1, each OFDM symbol period is 200 chips.The OFDM symbol can carry the OFDM data on following subcarrier: (i) be used for the corresponding subcarrier of traffic segment of OFDM, and (ii) remaining available subcarrier on two edges of spectrum allocation may.With the corresponding subcarrier of the traffic segment with CDM data on, can also make OFDM symbol zero clearing (null out).Thus, the OFDM symbol can carry the OFDM data, and these OFDM data can optionally substitute the zero of zero or a plurality of HRPD carrier waves or the CDM data in a plurality of traffic segment.OFDM allows to utilize better the usable spectrum in the spectrum allocation may of 5MHz.

Can be based on various factors, such as the pulse shaping filter that is used for CDM, generate mode of CDM data and/or OFDM data or the like, select the interval between the HRPD carrier wave.The protection subcarrier is the subcarrier that does not carry out transmitting, and it can be used on the two edges of spectrum allocation may.Can require and/or other factors based on spurious emissions, be chosen in the quantity of the protection subcarrier on the band edge.

Fig. 6 shows in HRPD the multi-carrier time slot structure 600 of supporting CDM and OFDM and utilizing available bandwidth more fully.Structure of time slot 600 is included in all traffic segment and the expense section in the structure of time slot 500 of Fig. 5.The expense that structure of time slot 600 also is included in the 224-chip is not used for the OFDM data of the portions of the spectrum of pilot or MAC section at interval.

Can define extra OFDM sign digit and learn a skill for covering the 224-chip expense interval of pilot and MAC section.Can select these numerology technology, thereby make: (i) in the expense interval, can send the OFDM symbol of integer amount, and (ii) the sample rate of OFDM symbol be the integral multiple of spreading rate.Table 2 has been listed two example OFDM sign digits that are used for the expense interval and has been learned a skill.The OFDM symbol that sends at interval in expense is called " length " OFDM symbol, because their duration is than the learn a skill longer duration of " routine " OFDM symbol of sending in service interval of the respective digital in the employing table 1.

Table 2

Parameter	The numerology technology 1 of long OFDM symbol	The numerology technology 2 of long OFDM symbol	Unit
Parameter	The numerology technology 1 of long OFDM symbol	The numerology technology 2 of long OFDM symbol	Unit	Sample rate	1.2288×n	1.2288×n	Msps
Number of sub carrier wave	100×n	200×n		Sample rate	1.2288×n	1.2288×n	Msps
Number of sub carrier wave	100×n	200×n		Subcarrier spacing	12.288...	6.144...	KHz
Available part	100 (≈81.38μs)	200 (≈162.76μs)	Chip	Subcarrier spacing	12.288...	6.144...	KHz
Available part	100 (≈81.38μs)	200 (≈162.76μs)	Chip	Circulating prefix-length	8 (≈6.51μs)	20 (≈16.28μs)	Chip
The guard time of windowing	4 (≈3.26μs)	4 (≈3.26μs)	Chip	Circulating prefix-length	8 (≈6.51μs)	20 (≈16.28μs)	Chip
The guard time of windowing	4 (≈3.26μs)	4 (≈3.26μs)	Chip	The OFDM symbol duration	112 (≈91.15μs)	224 (≈182.29μs)	Chip

Also other OFDM sign digits can be learned a skill and be used for expense at interval.Usually, can learn a skill to the OFDM sign digit and select, thereby make: (i) OFDM symbol duration and sample rate respectively with HRPD time slot format and spreading rate compatibility, and (ii) the DFT size allows to realize effectively to generate the OFDM symbol.

As described below, can generate OFDM symbol for each the OFDM symbol period in the expense interval.With this bandwidth in be not used for the corresponding carrier wave of part of pilot and MAC section, the OFDM symbol can carry the OFDM data.With pilot and the corresponding subcarrier of MAC section on, can be with the zero clearing of OFDM symbol.By in the expense interval, using one or more long OFDM symbols, can improve the overall spectrum utilance.

In the design of Fig. 5 and 6, can define four logic channel Ch1, Ch2, Ch3 and Ch4 for traffic segment.These logic channels are also referred to as data channel, Traffic Channel etc.Logic channel Ch1 can be included in traffic segment 1a and the 1b that sends on the HRPD carrier wave 1, logic channel Ch2 can be included in traffic segment 2a and the 2b that sends on the HRPD carrier wave 2, logic channel Ch3 can be included in traffic segment 3a and the 3b that sends on the HRPD carrier wave 3, and logic channel Ch4 can be included in traffic segment 4a, 4b and the 4c that sends on the residue usable spectrum.Thus, logic channel Ch1, Ch2 and Ch3 are corresponding to overlapping with HRPD carrier wave 1,2 and 3 respectively subcarrier.Logic channel Ch1, Ch2 and Ch3 can switch between CDM and OFDM in each time slot, each half crack or the like.Logic channel Ch4 does not have relevant HRPD carrier wave, and can be used to improve bandwidth availability ratio.Logic channel Ch4 can also be divided into two logical sub-channel, for example, following Ch4 (lower Ch4) and last Ch4 (UpperCh4), wherein each logical sub-channel all comprises one group of continuous sub-carriers.Can carry out independent scheduling to these logic channels.For example, the channel-quality feedback that can receive based on the terminal from each logic channel is dispatched this logic channel.

Usually, in given spectrum allocation may, can send the HRPD carrier wave of any amount.For each HRPD carrier wave, each traffic segment can be carried CDM data or OFDM data.Can also in the untapped residue usable spectrum of HRPD carrier wave, send the OFDM data.

Fig. 7 shows and support to be used for the OFDM of single HRPD carrier wave and the structure of time slot 700 of CDM in the 5MHz spectrum allocation may.In the example depicted in fig. 7, this single HRPD carrier wave is positioned near the edge of this 5MHz spectrum allocation may.Described in Fig. 2 to 6, generate the pilot and the MAC section of this HRPD carrier wave as above, and send this pilot and MAC section in half crack central authorities.Each traffic segment of HRPD carrier wave can be carried CDM data or OFDM data.

The OFDM frequency spectrum can be defined as and comprise except this HRPD carrier wave all usable spectrums in this spectrum allocation may.In the example depicted in fig. 7, the OFDM frequency spectrum is included in the usable spectrum of these HRPD carrier wave both sides.Can expand conventional OFDM symbol and long OFDM symbol, and it is used for carrying data in the OFDM frequency spectrum.Business datum, signaling and pilot tone can send in the OFDM frequency spectrum by any way, for example, use normally used any technology in the system that only adopts OFDM or OFDMA.For example, can on any subcarrier and symbol period, send pilot tone and signaling by any way.Available subcarrier and symbol period the terminal of any amount can also be distributed to, and the terminal of being dispatched can be sent the data in any way.

In design shown in Figure 7, two logic channel Ch1 and Ch2 have been defined.Logic channel Ch1 is included on the HRPD carrier wave 1 traffic segment 1a and the 1b that sends, and logic channel Ch2 is included in the traffic segment 2a that sends on the OFDM frequency spectrum to 2f.In each time slot, each half crack etc., logic channel Ch1 can switch between CDM and OFDM.Logic channel Ch2 is not bound to any HRPD carrier wave, and can operate with pure OFDM pattern, so that only carry the OFDM data.Business datum, signaling and/or pilot tone can utilize OFDM to send on logic channel Ch2 by any way.

Fig. 8 shows the HRPD structure of time slot 800 of supporting OFDM in the 5MHz spectrum allocation may.In the example depicted in fig. 8, this spectrum allocation may does not comprise the HRPD carrier wave.Except the protection sub-band on the band edge, can in whole usable spectrum, use conventional OFDM symbol and long OFDM symbol to send data.Logic channel Ch1 can be defined and cover whole usable spectrum.Can be used for the OFDM/OFDMA system as it and come operation logic channel Ch1, and logic channel Ch1 can be in conjunction with from such as Flash , other OFDM/OFDMA technology such as IEEE 802.20, LTE design considerations.Temporal frequency resource in logic channel Ch1 can be divided into the service resources, the signal resource that is used for signaling that are used for business datum, be used for pilot resources of pilot tone or the like.Signal resource can be used for dispatch terminal, and gives the terminal of being dispatched with traffic resource assignment.Signal resource can also be used for promoting to mix retransmitting (HARQ) feedback, power control or the like automatically.Flash

, IEEE 802.20, LTE and/or other OFDM/OFDMA systems various structural elements and physical layer attributes may be used to logic channel Ch1.

Fig. 9 shows the design block diagram of access point 110 and terminal 120, and access point 110 and terminal 120 are one of in access point among Fig. 1 and the terminal.For simplicity, in Fig. 9, only show the processing unit that is used for transmitting on the forward link.

At access point 110, TX CDM/OFDM processor 920 receives and processing service data and signaling as described below, and the output sampling is provided.(for example, being transformed into simulation, amplification, filtering, up-conversion) handled in 922 pairs of output samplings of transmitter (TMTR), and generates forward link signal, via antenna 924 these forward link signals of emission.In terminal 120, antenna 952 receives the forward link signal from access point 110, and received signal is offered receiver (RCVR) 954.Receiver 954 is handled (for example, filtering, amplification, down-conversion, digitlization) to received signal, and the reception sampling is provided.RX CDM/OFDM processor 960 receives sampling to handle with the mode of the processing complementation of TX CDM/OFDM 920, and is as described below, and decoded data is provided and receives signaling for this terminal 120.

Controller

930 and 970 instructs the operation on access point 110 and terminal 120

respectively.Memory

932 and 972 is respectively access point 110 and terminal 120 program code stored and data.

Figure 10 shows the block diagram of TX CDM/OFDM processor 920a, and it is a kind of design of the TX CDM/OFDM processor 920 among Fig. 1.Processor 920a comprises: (i) the CDM processor 1010, and the CDM waveform of CDM data and overhead data is carried in its generation, and (ii) OFDM processor 1050, and the OFDM waveform of OFDM data is carried in its generation.

In CDM processor 1010, encoder/interleaver 1012 receives the business datum that CDM to be used sends, based on encoding scheme this business datum is encoded, and to the data behind the coding interweave (or reordering).Symbol mapper 1014 is mapped to data symbol based on modulation scheme with interleaving data.Demodulation multiplexer (Demux) 1016 is a plurality of (for example 16) stream with the data symbol demultiplexing.Walsh capping unit (Walsh cover unit) 1018 utilizes different 16-chip Walsh sign indicating numbers to cover or each data symbol stream of channelizing, to obtain corresponding stream of data chips.Adder 1020 is a plurality of (for example 16) stream of data chips addition of a plurality of Walsh sign indicating numbers, and provides CDM data with spreading rate.TX overhead processor 1022 receives signaling that is used for the MAC section and the pilot data that is used for pilot, and generates overhead data with the spreading rate of expense section.TDM multiplexer (Mux) 1024 receives the CDM data from adder 1020, receives overhead data from processor 1022, and the CDM data in the expense section of carrying the CDM data are provided, and the overhead data in the expense section is provided.Multiplier 1026 multiplies each other the output of TDM multiplexer 1024 and the pseudo noise of access point (PN) sequence, and provides the output chip with spreading rate.1028 pairs of pulse shaping filters output chip carries out filtering, and provides CDM waveform for a HRPD carrier wave.Can utilize a plurality of examples of CDM processor 1010 to generate a plurality of CDM waveforms that are used for a plurality of HRPD carrier waves.These CDM waveforms can upconvert to suitable frequency in numeric field or analog domain.

In OFDM processor 1050, encoder/interleaver 1052 receives the business datum that OFDM to be used sends, and based on encoding scheme this business datum is encoded, and the data behind the coding are interweaved.Symbol mapper 1054 is mapped to data symbol based on modulation scheme with interleaving data.Symbol to subcarrier mapper 1056 is mapped to data symbol the subcarrier that is used for OFDM.Zero insertion unit 1058 is inserted into the subcarrier that is not used for OFDM with nil symbol (its value of symbol that has is zero), for example, and with CDM traffic segment and the corresponding subcarrier of expense section, zero subcarrier and protection subcarrier.The data symbol of the 1060 pairs of subcarriers of K altogether in each OFDM symbol period in inverse discrete Fourier transformer inverse-discrete (IDFT) unit and nil symbol are carried out K point IDFT, and the available part that comprises K time-domain sampling is provided.K depends on that the OFDM sign digit learns a skill, and provides with long OFDM symbol at conventional OFDM symbol in table 1 and 2.Cyclic Prefix inserts last C the sampling that unit 1062 duplicates this available part, and this C sampling appended to the front of this available part, so that form the OFDM symbol that comprises K+C sampling that adopts this sample rate.Sample rate can be chip speed n doubly, wherein, n can equal 1,2,3,4 or the like.This repeating part is called Cyclic Prefix, and is used to resist because the ISI that the frequency selectivity decline is caused.Window/1028 pairs of samplings from unit 1062 of pulse shaping filter window and filtering, and OFDM are provided waveform.Adder 1070 will be from the CDM waveform of CDM processor 1010 with from the OFDM waveform adder of OFDM processor 1050, and output waveform is provided.

Figure 11 shows the block diagram of TX CDM/OFDM processor 920b, and it is another design of the TX CDM/OFDM processor 920 in Fig. 1.Processor 920b with the CDM data map to the subcarrier that is used for CDM, with the OFDM data map to the subcarrier that is used for OFDM.Then, processor 920b generates output waveform based on CDM data of being shone upon and OFDM data.

In processor 920b, TX CDM processor 1110 receives and handles business datum, signaling and the pilot tone that CDM to be used sends, and the output chip is provided.Processor 1110 can comprise the unit 1012 to 1026 among Figure 10.L point DFT is carried out to the output chip in each OFDM symbol period in DFT unit 1112, and provides L frequency domain symbol for L subcarrier.L is the quantity with the corresponding subcarrier of HRPD carrier wave, and it depends on that the OFDM sign digit learns a skill.

Encoder/interleaver 1120 and symbol mapper 1122 are handled the business datum that OFDM to be used sends, and data symbol is provided.Symbol to subcarrier mapper 1130 will be mapped to the subcarrier that is used for CDM from the frequency domain symbol of DFT unit 1112, and will be mapped to the subcarrier that is used for OFDM from the data symbol of symbol mapper 1122.Zero insertion unit 1132 is inserted into the subcarrier that is not used for CDM or OFDM with nil symbol, for example, and zero subcarrier and protection subcarrier.1134 pairs of K the symbols at each OFDM symbol period in IDFT unit are carried out K point IDFT, and the available part that comprises K time-domain sampling is provided.Cyclic Prefix inserts unit 1136 Cyclic Prefix is inserted into this available part, and the OFDM symbol that comprises K+C sampling that adopts sample rate is provided.Window/1138 pairs of samplings from unit 1136 of pulse shaping filter window and filtering, and output waveform are provided.Filter 1136 can provide the spectral roll-off (spectral roll-off) more precipitous than the filter among Figure 10 1028, and this can realize the better utilization to spectrum allocation may.

Figure 12 shows the block diagram of RX CDM/OFDM processor 960a, and it is a kind of design of the RX CDM/OFDM 960 among Fig. 9.Processor 960a can be used for receiving the output waveform that the TX CDM/OFDM processor 920a by Figure 10 is generated.

In order to recover the CDM data, filter 1212 obtains to receive sampling from receiver 954, carries out filtering to remove the spectrum component outside paid close attention to HRPD carrier wave to receiving sampling, carries out the conversion from the sample rate to the spreading rate, and provides through filtered chip.Multiplier 1214 should multiply each other through filtered chip and the employed PN sequence of access point, and the input chip is provided.TDM demodulation multiplexer 1216 offers channel estimator 1218 with the input chip of pilot, the input chip of MAC section is offered RX overhead processor 1220, and the input chip that will carry the traffic segment of CDM data offers Walsh and goes to cover (decover) unit 1222.Channel estimator 1218 obtains channel estimating based on the pilot tone that is received.The input sample that 1222 pairs of unit are used for each Walsh sign indicating number of CDM data goes to cover or go channelizing, and receiving symbol is provided.The receiving symbol of 1224 pairs of all Walsh sign indicating numbers of multiplexer carries out multiplexing.Data demodulator (Demod) 1226 uses described channel estimating that receiving symbol is carried out the coherence and detects, and provides data symbol to estimate, described data symbol estimation is the estimation for the data symbol that adopts CDM to send.1228 pairs of described data symbols of deinterleaver/decoder are estimated to carry out deinterleaving and decoding, and the decoded data of CDM is provided.RX overhead processor 1220 is handled the input chip of MAC section, and the reception signaling is provided.

In order to recover the OFDM data, cyclic prefix removal unit 1252 obtains K+C reception sampling in each OFDM symbol period, removes Cyclic Prefix, and provides K of available part to receive sampling.1254 pairs K of DFT unit receives sampling and carries out K point DFT, and K receiving symbol of K subcarrier altogether is provided.Symbol to sub-carrier demapper 1256 obtains the receiving symbol of K subcarrier altogether, and the reception data symbol that will be used for the subcarrier of OFDM offers data demodulator 1258, and can offer channel estimator 1218 with receiving frequency pilot sign.Data demodulator 1258 is used to the channel estimating of self-channel estimator 1218 and (for example carries out Data Detection to receiving data symbol, matched filtering, equilibrium or the like), and providing data symbol to estimate, described data symbol estimation is the estimation to the data symbol that adopts the OFDM transmission.1260 pairs of described data symbols of deinterleaver/decoder are estimated to carry out deinterleaving and decoding, and the decoded data of OFDM is provided.

Figure 13 shows the block diagram of RX CDM/OFDM processor 960b, and it is another design of the RX CDM/OFDM 960 among Fig. 9.Processor 960b can be used for receiving the output waveform that the TX CDM/OFDM processor 920b by Figure 11 is generated.In processor 960b, cyclic prefix removal unit 1312 obtains K+C reception sampling in each OFDM symbol period, removes Cyclic Prefix, and provides K of available part to receive sampling.1314 pairs K of DFT unit receives sampling and carries out K point DFT, and K receiving symbol of K subcarrier altogether is provided.Symbol to sub-carrier demapper 1316 obtains the receiving symbol of K subcarrier altogether, and the receiving symbol that will be used for the subcarrier of CDM offers IDFT unit 1320, and the receiving symbol that will be used for the subcarrier of OFDM offers data demodulator 1330.

In order to recover the CDM data, L receiving symbol of the 1320 pairs of subcarriers that are used for CDM in the OFDM symbol period in IDFT unit carried out L point IDFT, and L time-domain sampling is provided.RX CDM processor 1322 is handled described time-domain sampling, and reception signaling and decoded data corresponding to CDM are provided.Processor 1322 can comprise the unit 1214 to 1228 among Figure 12.In order to recover the OFDM data, data demodulator 1330 uses channel estimating to carrying out Data Detection from the receiving symbol that removes mapper 1316, and provides data symbol to estimate.1332 pairs of described data symbols of deinterleaver/decoder are estimated to carry out deinterleaving and decoding, and are provided for the decoded data of OFDM.

For the sake of clarity, the various aspects of described technology have been specifically described at forward link transmissions at the use CDM of HRPD system and OFDM.Described technology can also be used for other combining forms of multiplexing scheme, such as, for example CDM and SC-FDM, CDM and TDM and OFDM, TDM and OFDM or the like.Described technology can also be used for other wireless communication systems and be used for forward link and reverse link.

In wireless system, guarantee that the reliable data packet transmission in each single transmission is inefficient.Change under the violent situation between each transmission at the bottom channel conditions, this inefficiencies is especially remarkable.For example, in ofdm system, between frame/grouping, in received signal to noise ratio (SNR), there are great changes, make the less frame error rate (FER) that guarantees each transmitted in packets become difficult and inefficient thus.This difficulty and inefficient other communication systems that adopt the quadrature multiple access technology that also are applicable to, these quadrature multiple access technologies are including, but not limited to TDMA, FDMA and CDM or the like.

In this communication system, can use packet retransmission mechanism, such as automatic repeating transmission/repetitive requests (ARQ) process, help reduce this poor efficiency.Yet the ARQ process may cause the higher packet awaits time because its for each packeting average need the longer time by.Usually, the bigger packet awaits time may not be to be serious problem for data service, but this is for speech business or for the application of the other types that require low latency in the message transmission, and it not is gratifying then may being.In addition, the transmitted in packets stand-by period will increase along with the sustainable growth of number of users in the system.Therefore, in order to improve power system capacity (for example), should be kept lower or less transmission latency based on the throughput of system or the number of users or the like of using system simultaneously.ARQ generally includes and confirms/deny (ACK/NACK) signal, whether has successfully received grouping with indicating terminal.As an indefiniteness example, terminal can be used and check that algorithm assesses the grouping of arrival, described inspection algorithm for example for the verification that comprises institute's Data transmission and hash function.A kind of this hash function is a Cyclic Redundancy Check, and it can be used for determining to divide into groups correctly to be received and do not have error bit.If CRC assesses successfully, then all in grouping all are correct, and terminal can be sent ACK and comes indicating terminal not need packet retransmission.If CRC assessment is incorrect, then may not be that all positions in the grouping are all correct, and terminal can be sent NACK and comes indicating terminal to need packet retransmission.

Embodiments of the invention have adopted and have used the half crack on the forward link rather than the transmitted in packets of employed complete time slot in the forward link of routine.The transmission of half crack has realized the better granularity of grouping size, and thus, has realized the big probability for the less successfully transmission of dividing into groups.Though the stand-by period may be identical, less granularity means that size of data of each son grouping is less, and has bigger probability to be implemented in not need to resend under any situation of dividing into groups to stator and correctly transmit.Grouping or son grouping (that is, the part of a grouping) can be launched in the half crack, and this depends on the payload in grouping size and half crack.Be commonly referred to as the payload of time slot or the payload in half crack in this used " grouping ".It will be recognized by those of ordinary skills, these groupings by the time slot definition can comprise the son grouping of conventional packet or routine data grouping.

Figure 14 A shows the transmitted in packets of conventional complete time slot packet oriented protocol.Figure 14 B shows according to embodiments of the invention, uses the transmitted in packets of half crack packet oriented protocol.In Figure 14 A, each grouping (or son grouping) takies a time slot, and transmission channel is equipped with four interweave (interlace), can have four different data packet flows going to identical or different terminal to be illustrated in interweaving.

Be transmitted into terminal in case will divide into groups from access point, may need to spend two time slots of terminal and use the ARQ that comprises ACK/NACK information to begin to reply.The duration of ARQ can be half time slot, and returns on the reverse link shown in Figure 14 A.Therefore, access point is four groupings after original packet sends receiving the opportunity the earliest that resends grouping under the situation of NACK.The result is that four permissions that interweave determine that based on ACK/NACK information any given data flow can send new grouping and still will resend previous grouping.

Shown in Figure 14 A, access point sends grouping 1, grouping 2, grouping 3 and divides into groups 4 in first interweaves.At grouping 4 time durations, the terminal utilization of reception and decoded packet 1 is replied corresponding to the ARQ1 that comprises ACK/NACK information of grouping 1.Thereby, use this ACK/NACK information, if receive ACK, then access point can send the grouping 1 ' as the new grouping of first data flow, if receive NACK, then access point sends the previous grouping that has sent of first data flow once more.Similarly,, send, and access point can be in the 2 ' time of grouping responds with new grouping or the grouping that resends corresponding to ARQ2 from the grouping 2 of second data flow at grouping 1 ' time durations.

Figure 14 B shows according to embodiments of the invention, uses the transmitted in packets of half crack packet oriented protocol.In Figure 14 A, each grouping (or son grouping) takies time slot half, and as the indefiniteness example, transmission channel is equipped with eight to interweave, and can have eight different data packet flows going to identical or different terminal to be illustrated in interweaving.Thus, the embodiments of the invention more data stream that allows in the piece of four given time slots, to interweave.In addition, half crack granularity means that size of data of each son grouping is less, and has bigger probability to be implemented in not need under the situation that resends any given grouping and correctly transmit.

As shown in Figure 14B, access point sends grouping 1-8 in first interweaves.At grouping 7 time durations (it is the stand-by period identical with the normal flow of Figure 14 A), the terminal utilization of reception and decoded packet 1 is replied corresponding to the ARQ1 that comprises ACK/NACK information of grouping 1.Thereby, use this ACK/NACK information, if receive ACK, then access point can send the grouping 1 ' as the new grouping of first data flow, if receive NACK, then access point sends the previous grouping that has sent of first data flow once more.Similarly,, send, and access point can be in the 2 ' time of grouping responds with new grouping or the grouping that resends corresponding to ARQ2 from the grouping 2 of second data flow at grouping 8 time durations.Similar mechanism can be used at each the half crack grouping shown in ARQ3 and the ARQ4.

In addition, though also not shown in single figure, the configuration that interweaves with four complete time slots of Figure 14 A can combine with the interweaving of 8 half cracks that have shown in Figure 14 B.As the indefiniteness example, in Figure 14 B, half crack grouping 3 and 4 can be merged into single complete time slot grouping.Thus, the ARQ that divides into groups corresponding to this complete time slot will take place on the time at ARQ3, and will not have ARQ4.Perhaps, the section of arbitrary given four time slots can comprise interweaving of four complete time slots or interweaving of eight half cracks.In other words, as the indefiniteness example, be interweaving of eight half cracks after the interweaving of four complete time slots, be interweaving of four complete time slots then.

Figure 15 shows with respect to the payload size that can use in an embodiment of the present invention and the various order of modulation of number of retries.When access point must resend grouping at every turn, it can change modulation, so that have the better chance that successfully sends grouping.In addition, terminal can be measured the quality of forward link channel, and this information is sent to access point.Access point can use the channel conditions that is received to predict acceptable transformat, the speed of transmitted in packets next time.As non-limiting example, terminal can use channel quality Return Channel (CQICH) that the channel quality measurements of optimal service sector is passed to the base station.Channel quality can be according to measuring based on the interference in the carrier wave of the forward link signal that is received (C/I) ratio.The C/I value can be mapped on CQI (CQI) symbol.

In addition, terminal can provide data rate control (DRC) information to access point.DRC information can be based on for example from the C/I measured value of previous forward link transmissions.Access point can use DRC information to determine to use which kind of modulation to receiving the grouping afterwards of this DRC information.

Spectrum efficiency is determined by modulation scheme.Can use various modulation schemes to carry out transfer of data.Every kind of modulation scheme is all relevant with the signal constellation (in digital modulation) that comprises M signaling point, wherein M〉1.Each signaling point is all by the definition of complex values, and utilizes the binary value sign of a B position, wherein B 〉=1 and 2B=M.For sign map, at first code bit to be sent is a plurality of groups with B code bit in groups.Every group of B code bit formed the binary value of B position, and it is mapped to the specific signal point, then the modulation symbol of this signal specific point as the group that is used for this B code bit sent.Thus, each modulation symbol has carried the information that is used for B code bit.Some the non-limiting example modulation treatment that can use in an embodiment of the present invention are: Quadrature Phase Shift Keying scheme (QPSK), 8-phase shift keying scheme (8-PSK) and 16-quadrature amplitude modulation (16-QAM) and 64QAM.

Therefore, as example,, when sending grouping for the first time, can utilize order of modulation 6 (that is, 64QAM) to send for 4096 payload size from Figure 15.If must resend this grouping, then when for the second time sending this grouping, can use again order of modulation 6 (, 64QAM) send.Yet, resend for the second time this grouping (that is, sending for the third time) if desired, access point can be with modulation modification order of modulation 4 (that is, 16QAM).Those of ordinary skills will be cognitive, for the smaller payloads size, can use less order of modulation, and this stands good in the grouping dimension of half crack.

Figure 16 shows with respect to payload and number of retries, the various data rates that can realize.Data rate among Figure 16 is corresponding to the order of modulation among payload size, the number of transmissions and Figure 15.

Figure 17 shows the block diagram of access point and terminal.Except also showing in the transmission of reverse link and in receiving the employed operating block, the block diagram of this block diagram and Fig. 9 is similar.Therefore, the function declaration at the described forward link of Fig. 9 more than can similarly be applied to Figure 17.

For reverse link, in terminal, the data that controller 970 uses from RX CDM/OFDM processor 960, and as explained above, determine whether successfully to receive grouping from the half crack.Then, controller 970 and TX data processor 980 combination (assemble) ARQ, and send it to reflector (TMTR) 982, to be transmitted into access point by antenna 952.In the access point side, receiver (RCVR) 942 receives reverse link information by antenna 924.930 couples of ARQ of RX data processor 940 and controller decode, to obtain information, forward link quality information such as CQI and the data rate control information such as DRC such as ACK/NACK information.

Use the combination of DRC, CQI and ACK/NACK information, controller can judge whether that the next one that use different modulation schemes to send this channel divides into groups.

Figure 18 shows the processing that is used to send and receive the grouping of half crack.The processing key element in left side is to handle 1750 by the access point that access point is carried out, and the processing key element on right side is can be by the terminal processes 1700 of terminal execution.Illustrated processing is used to send and resend potentially the given grouping of given data flow.It will be recognized by those of ordinary skills, relate to a lot of other and handle, be used for sending and monitor a plurality of groupings, and send and monitor a plurality of data flow in data flow.

Grouping sends to handle and can start from handling 1702, handling in 1720, DRC information is sent to access point from terminal.Perhaps, access point can begin the processing to grouping under the situation that need not DRC information.This is real especially for the follow-up grouping in the data flow.Since two starting points any handled 1752 definite data rate and modulation schemes of dividing into groups.Should determine to be subjected to the influence of DRC information (if existence) and payload size.Then, handle 1754 and in the half crack, this grouping is sent to terminal.Certainly, in any given time slot when preparing transmission, other also may take place handle and fill other traffic segment or half crack.

Handle the time slot of 1704 expression terminals, particularly be meant the half crack of being paid close attention to of this grouping, carry out the demodulation sign indicating number being received.Whether handle 1706 and determine packet integrity, this can comprise: carry out CRC and be successfully received with specified data, analyze channel quality to obtain CQI, perhaps its combination.If decision block 1708 expressions receive bit-errors, then need to resend.Resend if desired, then handle 1710 definition and should send NACK.If need not resend, then handle 1712 definition and should send ACK.Handle 1714 expressions and send ARQ, it comprises ACK/NACK information at least.ARQ can also comprise other information, such as, for example CQI information and DRC information.

Decision block 1756 expression access points determine whether to receive ACK or the NACK as the part of ARQ.If receive ACK, then this processing finishes, because do not need to resend current group.For the follow-up grouping in the data flow, with access point handle 1750 or terminal processes 1700 in any onely begin to be treated to inlet and repeat this processing.

If receive NACK, then handle and turn back to 1752, to determine the data rate of this grouping.When loopback, this data rate determines to be subjected to the influence of number of retries (not shown among Figure 18), payload size, DRC information (if existence) and CQI information (if existence).

It will be understood to those of skill in the art that and to use multiple different technologies to come expression information and signal.For example, the data of being mentioned in the above description, instruction, order, information, signal, position, symbol and chip can be represented with voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, optical field or optical particle or its combination in any.

Those of ordinary skills also will understand, and can be implemented as electronic hardware, computer software or its combination at this in conjunction with the described various illustrative components, blocks of the disclosure, module, circuit and algorithm steps.In order clearly to illustrate the interchangeability of this hardware and software, more than various illustrative parts, piece, module, circuit and step be described according to its function on the whole.It still is that software depends on concrete application and is added in design constraint on the whole system that this function is embodied as hardware.Those of ordinary skills can be at every kind of concrete described function of accomplished in various ways of using, and still this realization decision should not be construed as and causes breaking away from the scope of the present disclosure.

This can be in conjunction with the described various illustrative components, blocks of the disclosure, module and circuit with general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic devices, discrete door or transistor-transistor logic circuit, discrete hardware component or its any combination of being designed to carry out above-mentioned functions realize.General processor can be a microprocessor, but in replacement scheme, processor can be any conventional processors, controller, microcontroller or state machine.Processor can also be embodied as the combination of a plurality of calculating devices, for example DSP and microprocessor, a plurality of microprocessor, the one or more microprocessors that combine with the DSP kernel or the combination of any other structure.

Being combined in this software module of can be directly carrying out with hardware, by processor in conjunction with the step in described method of the disclosure or the algorithm or both combinations realizes.Software module can reside in the storage medium of RAM memory, flash memory, ROM memory, eprom memory, EEPRAM memory, register, hard disk, removable disc, CD-ROM or any other form well known in the prior art.Exemplary storage medium is coupled to processor, thus make processor can be from this storage medium sense information, and write information to wherein.In replacement scheme, storage medium can be integrated in the processor.Processor and storage medium can reside among the ASIC.ASIC can reside in the user terminal.In replacement scheme, processor and storage medium can be used as discrete parts and reside in the user terminal.In addition, software module can be sent to terminal or access point, so that store and carry out thereon.

Though described the present invention with reference to specific embodiment, should be appreciated that these embodiment are illustrative, scope of the present invention should not be limited to these embodiment.A lot of variations, modification, interpolation and improvement for the foregoing description all are feasible.What imagine is that these change, revise, add and improve within the scope of the present invention that all falls into the interior detailed description of accessory claim.

Claims

1, a kind of device comprises:

Receiver is used for from the distant station receiving channel information, and described channel information comprises ACK/NACK (confirming/deny) information;

At least one processor is used for

Generation comprises the output waveform of at least one time slot, and each time slot is divided into two half cracks, and wherein, at least one half crack comprises the data cell of grouping; And

Explain described ACK/NACK information, to determine whether and described data cell resend described distant station;

Memory, it is coupled to described at least one processor; And

Transmitter is used to launch described output waveform.

2, device as claimed in claim 1, wherein, described output waveform also comprises at least one additional time slot, wherein, described at least one additional time slot comprises from by another selected the following group that constitutes data cell: the data cell that is used for complete time slot from described grouping and configuration, be used for the data cell in half crack from another grouping and configuration, and from another grouping and configuration be used for the data cell of complete time slot.

3, device as claimed in claim 1, wherein, described output waveform also is configured to interweaving or its combination of the interweaving of eight half cracks, four complete time slots.

4, device as claimed in claim 1, wherein,

Described channel information also comprises data rate control information; And

Described at least one processor also is used for selecting in response to described data rate control information first modulation of described data cell.

5, device as claimed in claim 1, wherein,

Described at least one processor also is used to adopt the modulation relevant with the payload size of described data cell to generate described output waveform.

6, device as claimed in claim 1, wherein,

Should resend described data cell if described at least one processor also is used for described ACK/NACK information indication, then use the different modulating of described data cell to generate new output waveform; And

Described transmitter also is used for launching described new output waveform.

7, device as claimed in claim 6, wherein, the described different modulating of described new output waveform is selected as having the data rate lower than the modulation of described output waveform.

8, device as claimed in claim 6 wherein, is selected described different modulating: Quadrature Phase Shift Keying, 8-phase shift keying, 16-quadrature amplitude modulation and 64-quadrature amplitude modulation from the group of following formation.

9, device as claimed in claim 1, wherein,

Described channel information also comprises CQI;

Described at least one processor also is used for:

Explain described CQI; And

In response to the CQI of described explanation, utilize different modulation for data cell subsequently and generate new output waveform; And

Described transmitter also is used to launch described new output waveform.

10, device as claimed in claim 9 wherein, is selected described different modulating: Quadrature Phase Shift Keying, 8-phase shift keying, 16-quadrature amplitude modulation and 64-quadrature amplitude modulation from the group of following formation.

11, device as claimed in claim 1, wherein, described at least one processor also is used for:

To at least one traffic segment in each half crack each, select code division multiplexing (CDM) or OFDM (OFDM); And

Generation comprises the output waveform of described at least one traffic segment, if select CDM for each traffic segment, then this traffic segment is carried the CDM data, if select OFDM for each traffic segment, then this traffic segment is carried the OFDM data.

12, device as claimed in claim 11, wherein, described at least one processor also is used for:

Be each selection CDM or the OFDM in first and second traffic segment; And

Generate described output waveform, it comprises described first and second traffic segment and expense section, and each in described first and second traffic segment is carried CDM data or OFDM data, and described expense section is carried overhead data.

13, device as claimed in claim 11, wherein, described at least one processor also is used for:

Be each selection CDM or the OFDM in a plurality of traffic segment of a plurality of carrier waves; And

Generate described outgoing carrier, it comprises a plurality of traffic segment of described a plurality of carrier waves, and each traffic segment is carried CDM data or OFDM data.

14, device as claimed in claim 11, wherein, described at least one processor also is used for:

Generation comprises first waveform of the traffic segment of carrying the CDM data;

Generation comprises second waveform of the traffic segment of carrying the OFDM data; And

Generate described output waveform based on described first waveform and second waveform.

15, a kind of device comprises:

At least one processor is used for

Processing comprises the input waveform of at least one time slot, and each time slot is divided into two half cracks, and wherein, at least one half crack comprises the data cell of grouping;

The processing said data unit is to determine whether described data cell is correct; And

In response to the result of processing said data unit, generate ACK/NACK (confirming/deny) information;

Memory, it is coupled to described at least one processor; And

Transmitter is used to launch the channel information that comprises described ACK/NACK information.

16, device as claimed in claim 15, wherein, described input waveform also comprises at least one additional time slot, wherein, described at least one additional time slot comprises from by another selected the following group that constitutes data cell: the data cell that is used for complete time slot from described grouping and configuration, be used for the data cell in half crack from another grouping and configuration, and from another grouping and configuration be used for the data cell of complete time slot.

17, device as claimed in claim 15, wherein, described input waveform also is configured to interweaving or its combination of the interweaving of eight half cracks, four complete time slots.

18, device as claimed in claim 15, wherein, described at least one processor also is used for:

Generate data rate control information; And

Described data rate control information is included in the described channel information.

19, device as claimed in claim 15, wherein, described at least one processor also is used for:

Analyze received signal quality, and generate CQI in response to described received signal quality; And

Described CQI is included in the described channel information.

20, device as claimed in claim 15, wherein, described at least one processor also is used for, and uses the modulation of selecting from the group of following formation to come the processing said data unit: Quadrature Phase Shift Keying, 8-phase shift keying, 16-quadrature amplitude modulation and 64-quadrature amplitude modulation.

21, device as claimed in claim 15, wherein, described at least one processor also is used for,

Determine to be to use code division multiplexing (CDM) also to be to use OFDM (OFDM) at least one traffic segment in each half crack; And

If use CDM, then handle receiving sampling, with the CDM data of recovering in described traffic segment, to send, and

If use OFDM, then handle described reception sampling, with the OFDM data of recovering in described traffic segment, to send.

22, device as claimed in claim 21, wherein, described at least one processor also is used for,

Handle described reception sampling, be used for the receiving symbol of the subcarrier of described traffic segment with acquisition; And

Handle described receiving symbol, with the OFDM data of recovering in described traffic segment, to send.

23, device as claimed in claim 21, wherein, described at least one processor also is used for,

Filtering is carried out in described reception sampling, with the subcarrier that obtains to be used for described traffic segment through filtered sampling;

Handle described through filtered sampling, to obtain the input sample of described traffic segment;

Utilize a plurality of orthogonal codes that described input sample is gone to cover, to obtain receiving symbol; And

Handle described receiving symbol, with the CDM data of recovering in described traffic segment, to send.

24, device as claimed in claim 21, wherein, described at least one processor also is used for,

Handle described reception sampling, to obtain the frequency domain symbol of a plurality of subcarriers;

Processing is used for the described frequency domain symbol of the subcarrier of described traffic segment, to obtain time-domain sampling;

Utilize a plurality of orthogonal codes that described time-domain sampling is gone to cover, to obtain receiving symbol; And

25, a kind of communication system comprises:

At least one access point comprises:

The access point receiver is used for receiving the channel information that comprises ACK/NACK (confirming/deny) information;

At least one access point processor is used for

Explain described ACK/NACK information, to determine whether resending described data cell;

The access point memory, it is coupled to described at least one access point processor; And

The access point transmitter is used to launch described output waveform; And

At least one terminal comprises:

Terminal receiver is used to receive described output waveform;

At least one terminal handler is used for

Handle the described output waveform that comprises at least one time slot, each time slot is divided into two half cracks, and wherein, at least one half crack comprises the data cell of grouping;

In response to the result of processing said data unit, generate ACK/NACK (confirming/unconfirmed) information;

Terminal memory, it is coupled to described at least one terminal handler; And

Terminal transmitter is used to launch the channel information of the described ACK/NACK of comprising information.

26, communication system as claimed in claim 25, wherein, described output waveform also comprises at least one additional time slot, wherein, described at least one additional time slot comprises from by another selected the following group that constitutes data cell: the data cell that is used for complete time slot from described grouping and configuration, be used for the data cell in half crack from another grouping and configuration, and from another grouping and configuration be used for the data cell of complete time slot.

27, communication system as claimed in claim 25, wherein, described output waveform also is configured to interweaving or its combination of the interweaving of eight half cracks, four complete time slots.

28, communication system as claimed in claim 25, wherein:

Described channel information also comprises data rate control information; And

Described at least one access point processor also is used for selecting in response to described data rate control information first modulation of described data cell.

29, device as claimed in claim 25, wherein:

Described at least one access point processor also is used to adopt the modulation relevant with the payload size of described data cell to generate described output waveform.

30, communication system as claimed in claim 25, wherein:

Should resend described data cell if described at least one access point processor also is used for described ACK/NACK information indication, then use the different modulating of described data cell to generate new output waveform; And

Described transmitter also is used to launch described new output waveform.

31, device as claimed in claim 30, wherein, the described different modulating of described new output waveform is selected as having the data rate lower than the modulation of described output waveform.

32, communication system as claimed in claim 30 wherein, is selected described different modulating: Quadrature Phase Shift Keying, 8-phase shift keying, 16-quadrature amplitude modulation and 64-quadrature amplitude modulation from the group of following formation.

33, communication system as claimed in claim 25, wherein:

Described channel information also comprises CQI;

Described at least one access point processor also is used for:

Explain described CQI; And

Described transmitter also is used to launch described new output waveform.

34, communication system as claimed in claim 33 wherein, is selected described different modulating: Quadrature Phase Shift Keying, 8-phase shift keying, 16-quadrature amplitude modulation and 64-quadrature amplitude modulation from the group of following formation.

35, communication system as claimed in claim 25, wherein, described at least one access point processor also is used for:

36, communication system as claimed in claim 35, wherein, described at least one access point processor also is used for:

Be each selection CDM or the OFDM in first and second traffic segment; And

37, communication system as claimed in claim 35, wherein, described at least one access point processor also is used for:

Generate described output waveform, it comprises a plurality of traffic segment of described a plurality of carrier waves, and each traffic segment is carried CDM data or OFDM data.

38, communication system as claimed in claim 35, wherein, described at least one access point processor also is used for:

39, a kind of method in communication system comprises:

Generate output waveform on access point, described output waveform comprises at least one time slot, and each time slot is divided into two half cracks, and wherein, at least one half crack comprises the data cell of grouping;

On terminal:

Handle described output waveform, to extract described data cell;

Emission comprises the channel information of described ACK/NACK information;

On access point, explain described ACK/NACK information, to determine whether resending described data cell.

40, communication system as claimed in claim 39, wherein, described output waveform also comprises at least one additional time slot, wherein, described at least one additional time slot comprises from by another selected the following group that constitutes data cell: the data cell that is used for complete time slot from described grouping and configuration, be used for the data cell in half crack from another grouping and configuration, and from another grouping and configuration be used for the data cell of complete time slot.

41, communication system as claimed in claim 39, wherein, described output waveform also is generated as interweaving or its combination of the interweaving of eight half cracks, four complete time slots.

42, method as claimed in claim 39 also comprises: in response to the data rate control information that is included in the described channel information, select first modulation of described data cell.

43, device as claimed in claim 39 adopts the modulation relevant with the payload size of described data cell to generate described output waveform.

44, method as claimed in claim 39 also comprises:

If described ACK/NACK information indication should resend described data cell, then use the different modulating of described data cell to generate new output waveform; And

Launch described new output waveform.

45, device as claimed in claim 44, wherein, the described different modulating of described new output waveform is selected as having the data rate lower than the modulation of described output waveform.

46, method as claimed in claim 44 wherein, is selected described different modulating: Quadrature Phase Shift Keying, 8-phase shift keying, 16-quadrature amplitude modulation and 64-quadrature amplitude modulation from the group of following formation.

47, method as claimed in claim 39 also comprises:

Explanation is included in the CQI in the described channel information; And

In response to described explanation, utilize different modulation for data cell subsequently and generate new output waveform; And

Launch described new output waveform.

48, method as claimed in claim 47 wherein, is selected described different modulating: Quadrature Phase Shift Keying, 8-phase shift keying, 16-quadrature amplitude modulation and 64-quadrature amplitude modulation from the group of following formation.

49, method as claimed in claim 39 also comprises:

50, method as claimed in claim 49 also comprises:

Be each selection CDM or the OFDM in first and second traffic segment; And

51, method as claimed in claim 49 also comprises:

52, method as claimed in claim 49 also comprises: