CN101176286B - Device and method for allocating and receiving system resource in a quasi-orthogonal multiple-access communication system - Google Patents

Abstract

A channel structure has at least two channel sets. Each channel set contains multiple channels and is associated with a specific mapping of the channels to the system resources available for data transmission. Each channel set may be defined based on a channel tree having a hierarchical structure. To achieve intra-cell interference diversity, the channel-to-resource mapping for each channel set is pseudo-random with respect to the mapping for each remaining channel set. In each scheduling interval, terminals are scheduled for transmission on the forward and/or reverse link. The scheduled terminals are assigned channels from the channel sets. Multiple terminals may use the same system resources and their overlapping transmissions may be separated in the spatial domain. For example, beamforming may be performed to send multiple overlapping transmissions on the forward link, and receiver spatial processing may be performed to separate out multiple overlapping transmissions received on the reverse link.

Description

The apparatus and method of distribution and receiving system resource in quasi-orthogonal multiple-access communication system

To the cross reference of related application

This application claims the submit on March 16th, 2005 the 60/662nd, the priority of No. 634 U.S. Provisional Patent Application, is here all incorporated herein by reference it clearly.

technical field

Generally, the present invention relates to communication, specifically, the data that the present invention relates in multi-address communication system are launched.

background technology

Multi-address system can on forward and reverse link simultaneously with multiple terminal communication.Forward link (or down link) refers to the communication link from base station to terminal, and reverse link (or up link) refers to the communication link from terminal to base station.Multiple terminal can simultaneously transmitting data and/or receive data on the forward link on reverse link.This be usually by the multiple data on each link are launched carry out multiplexed, allow they in time, mutually orthogonally in frequency and/or in code domain to realize.In most of the cases, due to channel conditions, receiver defect etc. various factors, usually cannot realize multiple data launch between completely orthogonal.But quadrature multiplexing can guarantee that the interference that the data transmitting of each terminal is launched other terminal data is minimum.

At any given time, the quantity of the terminal that can communicate with multi-address system is limited to the quantity that may be used for the physical channel that data are launched usually, and the latter is limited to free system resources.Such as, in code division multiple access (CDMA) system, the quantity of physical channel is determined by the quantity of available orthogonal codes sequence, determined by the quantity of usable frequency subband in frequency division multiple access (FDMA) system, determined by available time slot quantity in time division multiple access (TDMA) system.In many cases, need to allow multiple terminal simultaneously and system communication, to improve power system capacity.Therefore some technology are needed to launch while multiple terminal to be supported in multi-address system in the art.

Summary of the invention

Be described herein distributing system resource, control intra-cell interference, realize the technology of higher power system capacity.In one embodiment, definition has the channel architecture of two channel sets at least.Each channel set comprises multiple channel, and is associated with the concrete mapping that described channel launches free system resources to data.Each channel set can be defined according to the channel trees with hierarchy.Described channel trees can comprise multiple " substantially " channel and multiple " compound " channel.Primary channel can be mapped to free system resources (such as utilizing frequency hopping).Each compound channel can be associated with at least two primary channels.For this channel trees, each channel distributing to terminal limits the distribution of at least one other channel.By dividing channel trees in a different manner and/or utilizing the different channels-resource mapping of channel set, the various channel architectures with disturbance characteristic can be formed.Such as, be pseudorandom by the mapping definition of each channel set is become relative to the mapping of each residue channel set, intra-cell interference diversity can be realized.

In each scheduling interval, dispatch terminal is launched on forward and/or reverse link.From described channel set to the terminal distribution channel that is scheduled.This scheduling and/or channel allocation can based on terminal for information about, such as they channel estimating, signal-noise and interference ratio (SNR) is estimated, service quality (QoS) requires, switching state etc.Multiple terminal can use same system resource, and their overlapping transmission can be separated in spatial domain.For forward link (FL), spatial manipulation (such as carrying out Wave beam forming) is carried out, then from multiple antenna transmission based on their FL channel estimating to the data of overlapping terminals.For reverse link (RL), received multiple transmittings of overlapping terminals by multiple antenna.Then based on RL channel estimating, spatial manipulation is carried out to the receiving symbol of overlapping terminals, to recover the transmitting from each terminal.

Various aspects of the present invention and embodiment are described below in detail.

Accompanying drawing explanation

Fig. 1 illustrates the system with multiple base station and multiple terminal;

Fig. 2 illustrates the mapping of physical channel to time-frequency block;

Fig. 3 illustrates binary channel tree;

Fig. 4,5 and 6 illustrates respectively and to load with fully loaded, part and three channel architectures of sequentially load channel set random overlapping;

Fig. 7 illustrates common overlapping channel architecture;

Fig. 8 illustrates the common overlapping channel architecture of Stochastic sum;

Fig. 9 illustrates the channel architecture with random overlapping channel subset;

Figure 10 illustrates the process of distributing system resource; And

Figure 11 is the block diagram that a base station and two terminals are described.

Embodiment

Here, " exemplary " this word is used for representing " serving as example, example or explanation ".Be described as " exemplary " any embodiment here all need not be interpreted as preferably, or relative to other embodiment or design, there is advantage.

Channel architecture described herein can be used for various multi-address communication system, the cdma system that such as (1) utilizes different orthogonal code sequence to be different user transmitting data; (2) in different frequency sub-bands, be the FDMA system of different user transmitting data; (3) in different time-gap, be the tdma system of different user transmitting data; (4) on different spaces channel, be space division multiple access (SDMA) system of different user transmitting data; (5) in different frequency sub-bands, be OFDM (OFDMA) system of different user transmitting data; Etc..OFDMA system utilizes OFDM (OFDM) technology, and it is a kind of multi-carrier modulation technology, and whole system bandwidth partition is become multiple (K) orthogonal frequency sub-bands by this technology.These subbands are also referred to as single CF signal, subcarrier, frequency, channel etc.Each subband to can be associated with of a Data Modulation corresponding subcarrier.

Channel architecture described herein can also be used to time division duplex (TDD) and Frequency Division Duplexing (FDD) (FDD) system, for forward and reverse link, can have and also can not have frequency hopping (FH) etc.For the sake of clarity, below for utilizing the concrete accurate orthogonal multiple access system of SDMA and OFDMA to describe channel architecture.This system is called as accurate orthogonal division access (QODA, quasi-orthogonal division access) system.

Fig. 1 illustrates the QODA system 100 with multiple base station 110 and multiple terminal 120.Base station is all generally fixed station, it and these terminal communications, can also be called as access point, Node B etc.Each base station 110 provides communication overlay for specific geographical area 102.Different according to the context at place, " community " this term can refer to the area of coverage of base station and/or base station.In order to improve power system capacity, base station overlay area can be divided into multiple less region (such as three less region 104a, 104b and 104c), they are usually overlapping on edge.Each less region provides service by a corresponding BTS under CROS environment (BTS).Different according to the context at place, " sector " this term can refer to the area of coverage of BTS and/or BTS.For the community dividing sector, the BTS of all sectors, this community is usually in the base station of this community.For simplicity, in general manner " base station " this term is provided the fixed station of service for being expressed as community and providing the fixed station of service for sector in the following description.The sector of service is provided to be the sector with terminal communication.

Terminal can be fixing, also can be mobile, can also be called as travelling carriage, wireless device, subscriber equipment etc.Here " terminal " and " user " these two terms can exchange.At any time, each terminal 120 can with 0, one or more base station communications.Multiple sectors of terminal and same community are carried out communication to carry out " softer " and are switched, and carry out communication to carry out " soft " switch with multiple community.

Each base station 110 is provided with the multiple antennas that may be used for data transmitting and receiving.Each terminal can be equipped with the one or more antennas for data transmitting and receiving.These multiple antennas of each base station represent multiple inputs (MI) of forward link transmitting and multiple outputs (MO) of reverse link transmissions.If select multiple terminal to launch simultaneously, multiple antennas of so selected terminal represent multiple output of forward link transmitting and multiple inputs of reverse link transmissions together.

QODA system can define some physical channels to support distribution and the utilization of free system resources.Physical channel is the means sending data in physical layer, also can be called channel, Traffic Channel, transmission channel, data channel etc.It can be system resource (such as subband, the time interval, code sequence etc.) the definition physical channel of any type.

Fig. 2 illustrates the exemplary division of free system resources (time and frequency) to time-frequency block.Also time-frequency block can be called transmitter unit etc.Each time-frequency block corresponds to a particular sub-band set in a particular time-slot.A sets of subbands can comprise one or more subband, and it can be continuous print or distributed within the scope of system bandwidth.Time slot can open into one or more code-element period.N number of time-frequency block is had, wherein N > 1 in each time slot.

Physical channel is mapped to the free system resources in QODA system by Fig. 2 also illustrated example ground.Physical channel is mapped to a particular sequence of time-frequency block.The time-frequency block of physical channel saltus step can realize frequency diversity between the frequency in different time-gap, as shown in Figure 2.Physical channel can be associated with frequency hopping (FH) pattern, and for the physical channel in each time slot, this frequency-hopping mode shows one or more specific time-frequency block (two time-frequency blocks in such as example shown in Fig. 2).Physical channel can be mapped to the time-frequency block in continuous slot (as shown in Figure 2) or discontinuous time slot.

QODA system can define the physical channel with different transmission capacity, so that distributing system resource is to terminal effectively.QODA system can also utilize such channel architecture, and physical channel is mapped to system resource by this structural support, and physical channel is distributed to user.

Fig. 3 illustrates the binary channel tree 300 that may be used for defining physical channel.In channel trees 300, each node represents the physical channel being assigned with unique channel identifier (ID).Channel trees 300 has six layers of physical channel.To 32 of bottom 1 physical channel allocated channel ID1 ~ 32, to 16 physical channel allocated channel ID 33 ~ 48 of the 2nd layer, to 8 physical channel allocated channel ID 49 ~ 56 of the 3rd layer, to 4 physical channel allocated channel ID 57 ~ 60 of the 4th layer, to 2 physical channel allocated channel ID 61 ~ 62 of the 5th layer, to the single physical channel allocated channel ID 63 of the 6th layer.32 basic physical channels (or referred to as primary channel) of bottom 1 are associated with the smallest allocation of system resource.Each primary channel is associated with a particular sequence of time-frequency block, as shown in Figure 2.These 32 primary channels are mutually orthogonal, so there is no any two primary channels and use same time-frequency block (the same sets of subbands namely in same time slot).Each in 31 more than primary channel compound physical channels (or referred to as compound channel) is associated with multiple primary channel.

Channel trees 300 has a kind of hierarchy.Each physical channel of every one deck (except bottom 1) comprises two " son " physical channels of lower level below.Such as, the physical channel 49 of the 3rd layer is made up of the physical channel 33 and 34 of the 2nd layer, is also made up of the physical channel 1 ~ 4 of the 1st layer.The time-frequency block of each physical channel is made up of the time-frequency block of all muon physics channels.Each physical channel (except the physical channel 63 of top layer 6) or a subset of another physical channel.Such as, physical channel 1 is the subset of physical channel 33, and physical channel 33 is a subset of physical channel 49, so goes down.

Channel tree structure is applied with specific restriction to the utilization of the physical channel of orthogonal system.For distributed each physical channel, belong to all physical channels of the subset of distributed physical channel, and the physical channel distributed is that all physical channels of its subset are all restricted.The physical channel be restricted can not use with distributed physical channel simultaneously, therefore, uses same system resource without any two physical channels simultaneously.Such as, if be assigned with physical channel 49, so physical channel 1 ~ 4,33,34,57,61 and 63 is restricted, if need orthogonal, they just can not use simultaneously together with physical channel 49.So each physical channel of distribution at least limits the distribution of other physical channel.

Fig. 3 illustrates the exemplary channel trees that may be used for defining physical channel.Other channel trees can also be used, do within the scope of the present invention like this.Such as, also can use non-binary channel tree, this non-binary channel tree includes some physical channels, and these physical channels are associated with the two or more physical channel in one or more lower level.In a word, channel trees can have the primary channel of any amount, the compound channel of any amount, and by any mapping that compound channel maps toward primary channel.

In QODA system, no matter when, as possible, on every bar link, the transmitting of different user is all send in different time-frequency blocks, to maintain the orthogonality between these transmittings.In order to improve power system capacity, available time-frequency block deficiency thinks whenever all users provide service, and multiple user can use same time-frequency block.As used here, " overlap " refers to the multiple transmittings sent on same time-frequency block, and " overlapping transmission " refers to the transmitting sent on same time-frequency block, and " overlapping user " and " overlapping terminals " is the user using same time-frequency block.The overlap of user can realize according to following scheme:

1. overlapping user randomly in each time slot, the interference randomization that each user is experienced, makes intra-cell interference diversity maximize.

2. in whole transmitting on same time-frequency block overlapping multiple user.

3. user is divided in groups, maintain the orthogonality between user in same group, the user randomly in overlapping different groups.

4. user divided in groups, the user randomly in each group overlapping, maintains the orthogonality between user in different groups.

5. allow switching user overlapping with the non-switching user in adjacent sectors.

Interference in community refers to the interference from same other users of community of user's experience.Intra-cell interference may use the user in multiple user of same time-frequency block and other sector, (2) same community from (1) same sector by SDMA.The performance tool of intra-cell interference to SDMA has a significant impact, and overlapping scheme described herein can be utilized to be controlled.

Scheme 1 can provide maximum intra-cell interference diversity for user.If the multiple transmittings on identical time-frequency block can separate with receiver space treatment technology, so scheme 2 is exactly favourable.Scheme 3 is compromises of scheme 1 and 2, wherein space correlation user can be placed on same group, therefore they can maintain mutually between orthogonality, realize the interference diversity of the interference from user in other group.Scheme 4 can support the user with different demand.These overlapping scheme can realize with various channel architecture, will be described below to this.

In one embodiment, obtain L example of channel trees by replication channels tree or copy and define channel architecture, wherein L > 1, walking abreast in L channel trees example the channel set of each.Between channel set and channel trees example, there is one_to_one corresponding map.Each channel set is associated with the mapped specific of primary channel to time-frequency block.For random overlapping, the mapping of each channel set from channel to resource is pseudorandom relative to the mapping of each in other L-1 channel set.Such as, each channel set can from different frequency-hopping mode set associative system.Primary channel in each channel set is mutually orthogonal, and is pseudorandom relative to the primary channel of each in other L-1 channel set.

Fig. 4 illustrates and the channel architecture 400 being fully loaded with channel set random overlapping.In this example, form L channel set, L example of channel trees has eight primary channels.To primary channel allocated channel ID1 ~ 8.Each channel set distributes different frequency-hopping mode set.The frequency-hopping mode of each channel set is mutually orthogonal, and is pseudorandom relative to the frequency-hopping mode of each in other L-1 channel set.One of each primary channel frequency-hopping mode being assigned with this channel set in each channel set.The frequency-hopping mode of each primary channel shows the time-frequency block (if any) for each time slot.

For channel architecture 400, all physical channels in each channel set may be used to transmission.According to following situation, at given time slot, physical channel likely for transmission, also may be not used in transmission: (1) this physical channel is mapped to the time-frequency block in this time slot; (2) this physical channel is assigned to a user; And (3) be transmitted on this time-frequency block obtain this distribute user/from obtain this distribute user send out.

Fig. 4 to also depict in eight time-frequency blocks and particular time-slot t in each channel set the mapping of eight primary channels to these eight time-frequency blocks.Such as, the primary channel 7 in channel set 1, primary channel 3 in channel set 2 etc., and the primary channel 5 in channel set L, be all mapped to the time-frequency block 1 in time slot t.For another time slot, primary channel is different to the mapping of time-frequency block, is determined by the frequency-hopping mode distributing to these primary channels.

For channel architecture 400, all primary channels in this L channel set all may be assigned to different users and launch for data.If all primary channels are all assigned with, so each time-frequency block has L overlapping user, and each user can be subject to the interference from L-1 other users.But because L channel set have employed pseudo-random hopping pattern, at different time slots, each user is subject to the interference from different L-1 users group.

Channel architecture 400 supports the overlap of scheme 1 and 3.For scheme 1, the physical channel in L channel set can be distributed randomly to user.At different time slots, the physical channel in different channels set (such as the availability of physically based deformation channel) can be distributed to user, but not distribute the multiple physical channels in different channels set (disturbing oneself to avoid oneself) at same time slot.For scheme 3, user be placed in some groups, each group is all associated with a channel set, distributes the physical channel in the channel set be associated to all users in each group.In different time slots, physical channels different in the channel set be associated can be distributed to user, but usually can not be moved to another group, such as, unless channel and/or working condition change.

Overlapping user can improve power system capacity, but also can cause stronger intra-cell interference.By overlapping user in a part of system bandwidth, compromise can be obtained between power system capacity and interference.

Fig. 5 illustrates the channel architecture 500 with part load channel set random overlapping.In this example, L the example with the channel trees of eight primary channels is utilized to form L channel set, each channel set and different frequency-hopping mode set associative systems, as shown in Figure 4.For channel architecture 500, each channel set has six available primary channels 1 ~ 6 and two unavailable primary channels 7 and 8.Physical channels available empty circles represents, the middle circle drawing fork of unavailable physical channel represents.Physical channels available can be distributed to user to be used for launching.Unavailable physical channel can not distribute, and can not be used for launching.

Fig. 5 to also depict in eight time-frequency blocks and particular time-slot t in each channel set the mapping of six available primary channels to eight time-frequency blocks.Such as, primary channel 3 in channel set 2 etc., and the primary channel 5 in channel set L, be all mapped to the time-frequency block 1 in time slot t.For different time slots, available primary channel is different to the mapping of time-frequency block.Load for part, each channel set does not use a part for system bandwidth.All available primary channels are because random frequency hopping all can by intra-cell interference to the same extent.Such as, as shown in Figure 5, each channel set is that part loads, and only uses 75% of available time-frequency block.For this example, each primary channel in each channel set is average overlapping with 1.5 other primary channels.

Channel architecture 500 also supports the overlap of scheme 1 and 3.For scheme 1, the physical channel in L channel set can be distributed randomly to user.For scheme 3, user is placed in some groups, distributes the physical channels available in the channel set be associated to the user in each group.

Fig. 5 illustrates that the embodiment in all L channel set all has same load factor, and in this example, it is 0.75.In another embodiment, each channel set is associated with a reuse factor of this channel set loading level of decision.Such as, channel set 1 can be associated with reuse factor 1.0, all eight primary channels in this channel set are all available, channel set 2 is associated with reuse factor 0.75, six primary channels are available, channel set 3 is associated with reuse factor 0.5, and four primary channels are available, etc.The different reuse factor of different channels set to cause in channel set overlap in various degree, provide different service quality.For the example of the channel set 1,2 and 3 respectively with reuse factor 1.0,0.75 and 0.5 provided above, each primary channel in channel set 1 is average overlapping with 1.25 other primary channels, each primary channel in channel set 2 is average overlapping with 1.5 other primary channels, and each primary channel in channel set 3 is average overlapping with 1.75 other primary channels.

Fig. 6 illustrates the channel architecture 600 with order load channel set random overlapping.In this example, form L channel set with L example of the channel trees with eight primary channels, each channel set is assigned with a different frequency-hopping mode set, as shown in Figure 4.For channel architecture 600, to use in order L channel set according to system loads.Like this, first the physical channel in channel set 1 is distributed to user, if then need and as required, physical channel in channel set 2 is distributed to user, so go down, need if finally remained and as required, the physical channel in channel set L distributed to user.Along with the difference of system loads situation, at any given time, there is the set of any amount in use.Only think that these users just use channel set j when providing service in channel set 1 ~ j-1 deficiency.For the example shown in Fig. 6, all primary channels in channel set 1 ~ L-1 and the primary channel in channel set L 1 and 2 are distributed to these users, only has primary channel 3 ~ 8 not used in channel set L, represent with black circle.

For channel architecture 600, under use before a channel set, each channel set is all used (if possible words).Channel architecture 600 can also provide different service quality.Such as, channel set 1 and 2 is all used, and only uses primary channel 1 and 2 in channel set 3.In this case, each primary channel in channel set 3 is overlapping with two other primary channels, and each primary channel in channel set 1 and 2 is average only overlapping with 1.25 other primary channels.To can also sequentially load the channel architecture 500 be used in Fig. 5.

L the example obtaining this channel trees is set by replication channels, for each in this L channel trees example forms a channel set, and utilize primary channel to arrive the same mapping of the time-frequency block of all L channel set, common overlap (commonoverlapping) can be obtained.Such as, can be the single set that all L channel set uses frequency-hopping mode.For each channel set, for each primary channel in this channel set distributes different frequency-hopping modes, all primary channels in this channel set are all mutually orthogonal.But the primary channel x in all L channel set uses same frequency-hopping mode.Primary channel x (multiple) comprises the primary channel x of primary channel x to channel set L of channel set 1, wherein x ∈ 1 ..., N}.

Fig. 7 illustrates common overlapping channel architecture 700.In this example, utilize L the example with the channel trees of eight primary channels to form L channel set, and all L channel set use same frequency-hopping mode set.Like this, the primary channel x of all L channel set is mapped to same time-frequency block sequence.For the example shown in Fig. 7, in time slot t, the primary channel 7 of all channel sets is mapped to time-frequency block 1, the primary channel 1 of all channel sets is mapped to time-frequency block 2, etc.For another time slot, primary channel is different to the mapping of time-frequency block.

For channel architecture 700, the user being assigned with different primary channel in same channel set is mutually orthogonal.The user being assigned with primary channel x in a channel set is continuously subject to the interference of the user being assigned with primary channel x in other channel set.Only have (exclusively) nearly L user can reuse the same sequence of time-frequency block.

For common overlap, the primary channel x in L channel set can be distributed to the user of space compatibility, these users are the users that can separate with receiver space treatment technology.Can distribute the different physical channels in same channel set to the user that space is incompatible, thus they are mutually orthogonal.

Fig. 8 illustrates the common overlapping channel architecture 800 of Stochastic sum.In this example, L the example with the channel trees of eight primary channels is utilized to form L channel set.Random overlapping is used for the first channel subset comprising primary channel 1 ~ 4.Common overlap is used for the second channel subset comprising primary channel 5 ~ 8.Each channel set and following set associative system: the different frequency-hopping mode set of (1) first channel subset and the common frequency-hopping mode set of (2) second channel subset.For each channel set, eight primary channels are mutually orthogonal.The primary channel 1 of this L channel set is associated from different frequency-hopping modes, and mutually between be pseudorandom.Primary channel 2,3 and 4 is also like this.The primary channel 5 of this L channel set is associated with same frequency-hopping mode, and shares same time-frequency block sequence.Primary channel 6,7 and 8 is also like this.

For channel architecture 800, the physical channel in second channel subset can be distributed for space compatible subscribers.The physical channel in the first channel subset can be distributed to other user.

Fig. 9 illustrates the channel architecture 900 with multiple random overlapping channel subset.In this example, L channel set is formed with L example of the channel trees with eight primary channels.Random overlapping is used for the first channel subset comprising primary channel 1 ~ 4.Also random overlapping is used for the second channel subset comprising primary channel 5 ~ 8.Two frequency-hopping mode set associative systems of each channel set and these two channel subset.Primary channel in first channel subset of each channel set is pseudorandom relative to the primary channel in each the first channel subset in other L-1 channel set.Second channel subset is also like this.

Channel architecture 900 supports overlapping scheme 4.For scheme 4, user be put in two groups, each group is all associated with a channel subset, distributes the physical channel in the channel subset be associated to all users in each group.The user being assigned with the physical channel in a channel set in the first channel subset can not be subject to the interference that (1) is assigned with other user of the physical channel in same channel set in same channel subset; (2) interference of other user of the physical channel in other channel subset of all L channel set is assigned with; And the random disturbances that (3) are assigned with other user of the physical channel in the same channel subset of other L-1 channel set can be subject to.

Above-mentioned exemplary channel architecture is described in Fig. 4 ~ 9.Other channel architecture can also be defined by structure here according to the description provided.In a word, channel architecture can have the channel set of any amount, the channel subset of any amount, the physical channel of any percentage of each channel subset, any reuse factor of each channel set/subset, and (such as random and/or common) of any type and combination in any is overlapping between these channel sets.

Once can define the channel architecture of QODA system, and remain unchanged later.Also according to the composition adaptively defining channel architecture of user in system, and user can be notified.

Fig. 4,5,6, the random overlapping scheme shown in 8 and 9 depends on statistic multiplexing to obtain average intra-cell interference.Common overlapping scheme shown in Fig. 7 and 8 allows directly to control intra-cell interference.For common overlap, each user only can be subject to the interference of other user using same time-frequency block.Intra-cell interference can be controlled to user by suitably distributing physical channel.

In a word, can according to various factors, such as spatial compatibility, reception SNR, quality of service requirement, switching state etc., distribute physical channel to user.For common overlap, the primary channel x in L channel set can be distributed to the space compatible subscribers that can separate with receiver space treatment technology.Jointly overlapping for Stochastic sum, physical channel can be distributed according to their reception SNR.Such as, better performance can be obtained by overlapping with high SNR user for low SNR user.Low SNR user can form the beam null towards high SNR user, and high SNR user can ignore the interference from low SNR user.For the channel architecture shown in Fig. 4 ~ 6, the physical channel in low SNR user's allocated channel set 1 can be given, the physical channel in high SNR user's allocated channel set 2 can be given.(1) common overlapping physical channel can be distributed to the user with high quality-of-service requirement, share these physical channels without any other user; Or the random overlapping physical channel of time-frequency block (2) is shared with low SNR user.These high quality-of-services user may be such as, because incremental redundancy transmission scheme, HARQ, and can not put up with the user of delay jitter.

Above-mentioned QODA system can support the switching user in various mode.Switching user can be soft handoff users or More Soft Handoff user.Soft handoff users is and multiple cell communication, can from the user of the cell merge to switching cell that provide service.More Soft Handoff user be in same community with multiple sector communication, can from the user of the sector switch to handoff sectors that provide service.In sectors/cells, switch user and usually can both realize low SNR.

In one embodiment, distribute physical channel to switching user according to the same way of non-switching user.By using receiver space treatment technology, switching user can be overlapping with non-switching user as smart as a new pin, and can not cause undue interference.For More Soft Handoff user, the user of service and handoff sectors is provided to attempt separately detecting the transmitting from the user using receiver space treatment technology.Then the code element from two sectors detected is carried out merging, separating mediation decoding to obtain the decoding data of this user.For soft handoff users, the community of service and switching cell is provided to attempt separately detecting the transmitting from this user, separating mediation decoding.The community correct to the data decoding of user provides the decoding data of this user.

In another embodiment, give and switch user and be assigned as physical channel in the shared channel subset that these users reserve.This shared channel subset is used by adjacent sector/cell.Primary channel in this shared channel subset is mutually orthogonal, and other physical channels all also used with adjacent sector/cell are orthogonal.The physical channel in shared channel subset can be distributed, so they are orthogonal with other users all in adjacent sector/cell to switching user.Network entity can be coordinated these and switch user, and the physical channel that can distribute in shared channel subset is to these users.Physical channel in shared channel subset can also be divided into multiple shared channel group.These channel group can be distributed to the different sector in community or different districts.So the physical channel in its shared channel group can be distributed to its switching user by each sectors/cells.

In another embodiment, switch and can utilize a copy of channel set in each sector of community, and Combined Treatment realizes from all Received signal strength of multiple sector.The community of a given L sector, utilizes the L of channel trees copy can form L channel set, and such as shown in Figure 4, wherein each channel set can be used by a sector.Interference in community can be separated with receiver space treatment technology.

Channel architecture described herein has various feature, comprising:

1. the orthogonality between the system resource of distributing to same user;

2. give be not good separation user distribute resource between orthogonality;

3. the interference diversity of overlapping user;

4. the flexible compromise between intra-cell interference degree and the resource reuse factor;

5. the common overlap of couple good separation user is supported; And

6. the support of pair More Soft Handoff.

For forward link, base station can from its all antenna transmission pilot signal on the subband of sufficient amount and code-element period, to provide good channel estimating performance for forward link.Pilot signal transmission from antenna for base station can be orthogonal on time, frequency, coding and/or some other territories, to allow terminal to distinguish each antenna for base station.Such as, the pilot signal of launching from each antenna for base station can produce with different orthogonal sequences, such as, produce with walsh code or ovsf code.According to the pilot signal of Base Transmitter, each terminal can estimate that the forward link channels from antenna for base station to terminal antenna responds.

For reverse link, each terminal can from a subset transmitting pilot signal of its all antennas or its antenna, allows the reverse chain channel response that base station is estimated from terminal antenna to antenna for base station.All users particularly overlapping user and the performance switching user depend on the quality of the RL channel estimating of user.For overlapping and switching user, RL channel estimating is used for receiver space process, to separate the transmitting from multiple user from same time-frequency block.Channel estimation errors causes residual error (or crosstalk) in the separation of multiple transmitting.Residual error represents the background noise likely reducing SNR.

The following describes and can support overlapping and switch user, and the exemplary pilot Design of Signal of good channels estimated performance is provided.In one embodiment, L channel set is associated from the individual different orthogonal pilot patterns of L, each channel set unification pilot signal patterns.Each pilot signal patterns is a sequence of P value, wherein P > 1, and is expressed as { w _l}=[w _{l, 1}, w _{l, 2}..., w _{l, P}], wherein l=1 ..., L.Such as, pilot signal sequence l can be defined as w _{l, i}=e ^{-j2sl (l-1) (i-1)/P}, wherein i=1 ..., P.Also other orthogonal sequence or coding can be used for above-mentioned pilot signal patterns.

The pilot signal that user in a sector launches becomes the interference signal of the pilot signal that the user in other sector, same community launches.In order to reduce the interference of pilot signal in community, can the scrambling pattern that same cell allocation is different be given, one, each sector scrambling pattern.Each sector-specific scrambling pattern is a sequence of P value, can be expressed as { x _s}=[x _{s, 1}, x _{s, 2}..., x _{s, P}], wherein s=1 ..., S, S are the sector numbers in community.Select this S sector-specific scrambling pattern, under various channel and working condition, provide good channel estimating performance.These scrambling pattern can such as obtain according to the search of a large amount of possibility scrambling pattern.Such as, may find a small amount of " good " scrambling sequence to the exhaustive search of 10000 sequences, wherein channel estimating bottom line (floor) is well below the interference from other source.

In order to make pilot signal interference randomization in community, can the scrambling pattern that neighbor cell allocation is different be given, one, each community scrambling pattern.Each cell-specific scrambling pattern is a sequence of P value, and is expressed as { y _c}=[y _{c, 1}, y _{c, 2}..., y _{c, P}], wherein c=1,2 ....Select the object of cell-specific scrambling pattern to be make the abundant difference of neighbor cell (such as have good their cross correlation, thus the pilot signal becoming interference is seemed be random as far as possible), and good channel estimating performance is provided.Along with the quantity of neighbor cell increases, the optimization of a large amount of communities scrambling sequence may be extremely complicated.Random sequence can both provide good performance usually.

The whole pilot signal patterns of the user that can communicate by the physical channel be assigned with in channel set l and with the sector s in the c of community is expressed as { p _{l, s, c}}=[p _{l, s, c, 1}, p _{l, s, c, 2}..., p _{l, s, c, P}], wherein for i=1 ..., P, p _{l, s, c, i}=w _{l, i}x _{s, i}y _{c, i}.Sector-specific scramble can be used, if these sectors employ more than one channel set; Then can ignore in other cases.Sector-specific scrambling pattern { x _scan be complete 1 sequence, if do not use sector-specific scramble.Similarly, if do not use cell-specific scramble, cell-specific scrambling pattern { y _cit can be complete 1 sequence.

Each user is according to the pilot signal patterns { w be associated with the physical channel distributed _l, the scrambling pattern { x of its sector _s, and the scrambling pattern { y of its community _c, form whole pilot signal patterns { p _{l, s, c}.Because each channel set is associated with a pilot signal patterns, channel allocation gives distributed physical channel and pilot signal patterns simultaneously.Each user can utilize its whole pilot signal patterns { p _{l, s, c}transmitting pilot signal in a part for each time-frequency block of distributed physical channel.Pilot signal from all users sharing to timing frequency block in same sector is mutually orthogonal, and reason is the orthogonal pilot patterns that these users use.If use sector-specific scramble, so relative to the pilot signal of the user from other sector, same community, the pilot signal from the user of each sector is pseudorandom.If use cell-specific scramble, so relative to the pilot signal from user in neighbor cell, be pseudorandom from the pilot signal of user in each community.Sector can process the pilot signal that user launches, and removes cell-specific scramble and sector-specific scramble simultaneously, and mates the pilot signal patterns of (be such as multiplied and add up) this user, and the reverse chain channel response obtaining this user is estimated.Orthogonal pilot patterns allows sector to be made a distinction by the channel response of the overlapping user utilizing identical time-frequency block.

In each time-frequency block that user can use at distributed physical channel, in code-element period and one or more transmitted on subbands pilot signal of sufficient amount.The emission rate of pilot signal depends on coherence time and the coherence bandwidth of communication link.Such as, user can on code-element period in each time-frequency block and cluster subband or at many bunches that are distributed in this time-frequency block whole (such as on four corners) upper transmitting pilot signals.

User can be equipped with the individual antenna that (1) can be used in data transmitting and receiving, (2) single transmitting antenna and multiple reception antenna, or (3) multiple transmitting and receiving antenna.For situation (3), user can according to a kind of mode transmitting pilot signal, and this mode is the channel response allowing sector to estimate each transmitting antenna.The same way process that can have N number of user of individual antenna according to process has the user of N number of transmitting antenna.

In one embodiment, give and switch user's distribution pilot signal patterns orthogonal with the pilot signal patterns that non-switching user uses, to improve the channel estimating performance switching user.Switch user and usually all have more weak signal to the sector and the handoff sectors that provide service, the ability to bear that also may have the interference from other user is poor.Can for switching the reserved pilot signal patterns subset of user.This reserved subset is used, such as, according to the mode that above-described shared channel is similar by all sectors of same community.Each pilot signal patterns in reserved subset can be distributed to one and switch user.Then, from each switching user pilot signal by orthogonal with from the pilot signal of other user in same community.

Channel architecture described herein supports that physical channel is to the mapping of system resource and physical channel to the distribution of user.These channel architectures can be used for forward link and reverse link.Data on forward and reverse link are launched can use same or different system resource.Identical or different channel architecture can be used for forward and reverse link.For simplicity, part here describes and assume that two kinds of links can use same system resource, and identical channel architecture is used for two kinds of links.

Figure 10 illustrates the process 1000 of distributing system resource and transmitting data in QODA system.At the beginning, definition at least has the channel architecture of two channel sets, and each channel set comprises multiple physical channel, and is associated (frame 1010) with physical channel to the concrete mapping of free system resources.Frame 1010 can be impliedly performed, for self adaptation/dynamic channel structure performs frame 1010 clearly for static channel structure.For at least one subset of physical channel, the mapping of each channel set is pseudorandom relative to the mapping of each residue channel set.As mentioned above, each channel set can define according to the channel trees with hierarchy.

In each scheduling interval, obtain the relevant information (frame 1012) with scheduling and/or channel allocation.This relevant information can comprise, such as channel estimating, SNR estimation, quality of service requirement, switching state etc.Terminal is dispatched, allows them carry out launching (frame 1014) at forward and/or reverse link.From channel set to the terminal distribution physical channel that is scheduled (frame 1016).Scheduling and/or channel allocation can be based upon the information that terminal is collected.Such as, these terminals can be divided in groups with channel estimating, SNR estimation and/or quality of service requirement, overlap spatially compatible terminal, isolation switching terminal etc.Can distribute physical channel to switching terminal, this physical channel is orthogonal with the physical channel that non-switching user in same community uses, and can also distribute a pilot signal patterns, this pilot signal patterns is orthogonal with the pilot signal patterns of non-switching user.Form channel allocation, and send to the terminal that is scheduled.

For forward link, (frame 1018) as described below, (such as in order to Wave beam forming), according to the data of the FL channel estimating of overlapping terminals spatially processing overlapping terminal, then launches (frame 1020) from multiple antenna for base station.For reverse link, receive multiple transmit (frame 1022) by multiple antenna for base station from overlapping terminals.RL channel estimating according to overlapping terminals carries out spatial manipulation (such as in order to spatial matched filtering) to the receiving symbol of overlapping terminals, recovers the transmitting (frame 1024) from each terminal.

On the forward link, multiple user can be given by multiple antenna transmitting data in each time-frequency block in base station.Base station can control to launch towards each FL of this targeted customer according to the channel estimating of targeted customer.For simplicity, below describe for be a time-frequency block, suppose that base station has many (T) individual antenna, suppose that each terminal has individual antenna.

T in base station forms multiple input single output (MISO) channel between antenna and the individual antenna of terminal u.This MISO channel can with a T × 1 channel response vector h _{fl, u}(k, t) characterizes, and can be by this vector representation:

h _fl，u(k，t)＝[h _u，1(k，t)h _u，2(k，t)...h _u，T(k，t)] ^T (1)

Wherein h _{u, j}(k, t) be in time slot t subband k from antenna for base station j to the complex channel gain of terminal antenna, j=1 ..., T, " ^t" represent transposition.

Base station can utilize this L channel set on same time-frequency block transmitting data to nearly L terminal.In a word, the limited amount of the terminal can launched on same time-frequency block in the quantity of base station antenna, therefore, L≤T.For simplicity, below describe hypothesis base station and be transmitted to L terminal in each time-frequency block.

FL multiple-input and multiple-output (MIMO) channel is formed between T antenna for base station and L antenna of L terminal.This FL mimo channel can with T × L channel response matrix h _fl(k, t) characterizes, and it can be expressed as:

H _fl(k，t)＝[ h _fl，1(k，t) h _fl，2(k，t)... h _fl，L(k，t)] (2)

h _fleach row of (k, t) correspond to the FL channel response vector of a terminal.

Transmitter spatial manipulation (or Wave beam forming) can be carried out for launching to the data of L terminal in the following manner in base station:

${\underset{\‾}{x}}_{\mathrm{fl}}(k,t,n)={\underset{\‾}{H}}_{\mathrm{fl}}^{*}(k,t)\·{\underset{\‾}{s}}_{\mathrm{fl}}(k,t,n)---\left(3\right)$

Wherein:

s _fl(k, t, n) is L × 1 vector, and this vector has L the data symbols that will send to L terminal in the code-element period n of time slot t on subband k;

x _fl(k, t, n) is T × 1 vector, this vector have will in the code-element period n of time slot t on subband k from T the transmit symbol that T antenna for base station sends; And

" * " represents conjugation.

For simplicity, in formula (3), eliminate the convergent-divergent (scaling) of the data symbols being transmitted to L terminal.Time slot t can cross over one or more code-element period.For simplicity, supposing that, on time slot t, channel response is constant, is not the function of code-element period n.Channel response matrix h _fl(k, t) depends on the specific collection of the terminal distributing to subband k in time slot t.The terminal overlapping with each time-frequency block can be selected, thus make their channel response vector spatially remove relevant, such as mutually orthogonal as much as possible.Otherwise can also carry out Wave beam forming, such as, based on pressure zero (ZF), maximum-ratio combing (MRC), Minimum Mean Square Error (MMSE) or some other technology.

For reverse link, base station can receive RL transmitting from reaching L terminal by T antenna on each time-frequency block.In a word, the limited amount of the terminal can launched on same time-frequency block is in the quantity of this base station antenna, and this quantity determines the ability that RL transmitting is isolated in base station, therefore L≤T.For simplicity, below describe hypothesis base station and receive transmitting from L terminal on each time-frequency block.

Single input and multi-output (SIMO) channel is formed between the individual antenna and T antenna of base station of each terminal.This SIMO channel of each terminal can with a T × 1 channel response vector h _{rl, u}(k, t) characterizes, and this vector has the form shown in formula (1).A RL mimo channel is formed between L the antenna and T antenna for base station of L end.This RLMIMO channel can with T × L channel response matrix h _rl(k, t) characterizes, and can be by this matrix notation:

H _rl(k，t)＝[ h _rl，1(k，t) h _rl，2(k，t)... h _rl，L(k，t)] (4)

h _rleach row of (k, t) correspond to a RL channel response vector of a terminal.Channel response matrix h _rl(k, t) depends at allocated time slot t to the specific collection of the terminal of subband k.

Base station obtains from T antenna the receiving symbol that the RL from L terminal launches, and they can be expressed as:

r(k，t，n)＝ H _rl(k，t)· s _rl(k，t，n)+ n(k，t，n) (5)

Wherein:

s _rl(k, t, n) is L × 1 vector, and this vector has L the data symbols that L terminal sends on subband k at the code-element period n of time slot t;

r(k, t, n) is T × 1 vector, this vector have by T antenna for base station the code-element period n of time slot t be subband k obtain T receiving symbol; And

n(k, t, n) is the noise vector of subband k in the code-element period n of time slot t.For simplicity, can suppose that noise is additive white Gaussian noise (AWGN), it has zero-mean vector, and covariance matrix is _nn=σ ². i, wherein σ ²the variance of noise, iit is unit matrix.

Base station can adopt various receiver space treatment technology to transmit to the RL isolating L terminal and send on same time-frequency block.These receiver space treatment technologies comprise pressure zero (ZF) technology, Minimum Mean Square Error (MMSE) technology, maximum-ratio combing (MRC) technology etc.Base station can based on ZF, MMSE or MRC technology derive spatial filter matrices in the following manner:

${\underset{\‾}{M}}_{\mathrm{zf}}(k,t)=[{\underset{\‾}{H}}_{\mathrm{rl}}^H(k,t)\·{\underset{\‾}{H}}_{\mathrm{rl}}(k,t){]}^{-1}\·{\underset{\‾}{H}}_{\mathrm{rl}}^H(k,t)---\left(6\right)$

${\underset{\‾}{M}}_{\mathrm{mmse}}(k,t)={\underset{\‾}{D}}_{\mathrm{mmse}}(k,t)\·[{\underset{\‾}{H}}_{\mathrm{rl}}^H(k,t)\·{\underset{\‾}{H}}_{\mathrm{rl}}(k,t)+{\mathrm{\σ}}^2\·\underset{\‾}{I}{]}^{-1}\·{\underset{\‾}{H}}_{\mathrm{rl}}^H(k,t)---\left(7\right)$

${\underset{\‾}{M}}_{\mathrm{mrc}}(k,t)={\underset{\‾}{D}}_{\mathrm{mrc}}(k,t)\·{\underset{\‾}{H}}_{\mathrm{rl}}^H(k,t)---\left(8\right)$

Wherein:

${\underset{\‾}{D}}_{\mathrm{mmse}}(k,t)=\mathrm{diag}\left\{\right[{\underset{\‾}{H}}_{\mathrm{rl}}^H(k,t)\·{\underset{\‾}{H}}_{\mathrm{rl}}(k,t)+{\mathrm{\σ}}^2\·\underset{\‾}{I}{]}^{-1}\·{\underset{\‾}{H}}_{\mathrm{rl}}^H(k,t)\·{\underset{\‾}{H}}_{\mathrm{rl}}(k,t){\}}^{-1},$

${\underset{\‾}{D}}_{\mathrm{mrc}}(k,t)=\mathrm{diag}[{\underset{\‾}{H}}_{\mathrm{rl}}^H(k,t)\·{\underset{\‾}{H}}_{\mathrm{rl}}(k,t){]}^{-1}.$

Base station is derived based on the pilot signal of L terminal transmission h _rlthe estimation of (k, t).For simplicity, formula (6) ~ (8) are supposed without any channel estimation errors.

Receiver space process can be carried out in the following manner in base station:

${\underset{\‾}{\overset{^}{s}}}_{\mathrm{rl}}(k,t,n)=\underset{\‾}{M}(k,t)\·\underset{\‾}{r}(k,t,n),$

$={\underset{\‾}{s}}_{\mathrm{rl}}(k,t,n)+\underset{\‾}{\overset{~}{n}}(k,t,n)---\left(9\right)$

Wherein:

m(k, t) can equal m _zf(k, t), m _mmse(k, t) or m _mrc(k, t);

be L × 1 vector, it has the L detected code element of subband k in the code-element period n of time slot t; And

carried out the later noise of receiver space process.

The code element detected is the estimation of the data symbols of launching.

For simplicity, above description assume that each terminal is equipped with an independent antenna.The terminal being equipped with multiple (R) antenna can receive multiple FL by this R antenna and launch on same time-frequency block, also can send multiple RL from this R antenna at same time-frequency block and launch.For each terminal antenna receiving FL transmitting, matrix h _fl(k, t) comprises row.For each terminal antenna for sending RL transmitting, matrix h _rl(k, t) comprises row.

Figure 11 illustrates an embodiment of base station 110 and two terminal 120x and 120y in QODA system 100.Base station 110 is equipped with many (T) individual antenna 1128a ~ 1128t, terminal 120x and is equipped with individual antenna 1152x, and terminal 120y is equipped with many (R) individual antenna 1152a ~ 1152r.

On the forward link, at base station 110 place, data/pilot signal processor 1120 receives business datum from data source 1112 for all terminals that is scheduled, and receives signaling (such as channel allocation) from controller 1130.These business datums and signaling carry out encoding, interweaving and symbol mapped by data/pilot signal processor 1120, generate data symbols, and further for forward link generates pilot symbols.As used here, data symbols is the modulated symbol for services/data data, pilot symbols is the code element (it is the data that transmitter and receiver is all known in advance) for pilot signal, modulated symbol is the complex value (such as M-PSK or M-QAM) of a point in the signal constellation (in digital modulation) figure of modulation scheme, and code element is any complex value.Launch (TX) spatial processor 1122 pairs of data symbols and carry out spatial manipulation (such as formula (3) Suo Shi), carry out multiplexed in pilot symbols, and provide transmit symbol to transmitter unit (TMTR) 1126a ~ 1126t.Each transmitter unit 1126 processes its (such as OFDM's) transmit symbol, generates FL modulated signal.FL modulated signal from transmitter unit 1126a ~ 1126t is launched from antenna 1128a ~ 1128t respectively.

At each terminal 120 place, one or more antenna 1152 receives the FL modulated signal launched, and each antenna provides the signal received to the receiver unit of correspondence (RCVR) 1154.Each receiver unit 1154 carries out the process of the process complementation carried out with transmitter unit 1126, and provides the code element received.For each terminal, channel estimator 1178 derives FL channel estimating according to the pilot signal received from base station 110.For multi-antenna terminal 120y, receive (RX) spatial processor 1160y and utilize FL channel estimating to carry out receiver space process to the code element received, the code element detected is provided.RX data processor 1170 to receive or the code element that detects carry out symbol demaps, deinterleave and decoding, provide decoding data to data sink 1172, to provide the signaling (such as channel allocation) detected to controller 1180.

On reverse link, business datum from data source 1188 is processed by data/pilot signal processor 1190 with the signaling (such as ACK/NAK) that will be sent by each terminal 120, if there is multiple antenna, just processed further by TX spatial processor 1192, next processed by transmitter unit 1154, launch from antenna 1152.At base station 110 place, the RL modulated signal launched from terminal 120 is received by antenna 1128, is processed by receiver unit 1126, obtains the code element received.Channel estimator 1136 is that each terminal 120 derives RL channel estimating according to the pilot signal received from this terminal.RX spatial processor 1140 utilizes the RL channel estimating of all terminals to carry out receiver space process (such as formula (9) Suo Shi) to the code element received, and provides the code element detected.RX data processor 1142 carries out symbol demaps to the code element detected subsequently, deinterleaves and decoding, provides decoding data to data sink 1144, to provide the signaling detected to controller 1130.

Controller 1130,1180x and 1180y control the work of base station 110 and terminal 120x and each processing unit of 120y place respectively.The data that memory cell 1132,1182x and 1182y difference store controller 1130,1180x and 1180y use and program code.Scheduler 1134 dispatch terminal transmitting data on forward and reverse link, and distribute physical channel to the terminal that is scheduled.Scheduler 1134 or some other network entities can distribute physical channel and pilot signal patterns to switching user.Controller 1130 can be formed for the terminal that is scheduled and transmitting channel distributes.

Technology described herein can realize by various means.Such as, these technology can realize with hardware, software or their combination.For hardware implementing, for dispatch terminal, allocated channel and carry out the processing unit of spatial manipulation can at one or more application-specific integrated circuit (ASIC) (ASIC), digital signal processor (DSP), digital signal processor (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, be designed to other electronic unit for realizing function as described herein, or their combination realizes.

For software simulating, these lift-off technologies can realize by the module realizing function described herein (such as subprogram, function etc.).Software code can be stored in memory cell (memory cell 1132 in such as Figure 11,1182x or 1182y), is performed by processor (such as controller 1130,1180x or 1180y).Memory cell also can realize outward at processor in processor.

The above description of embodiment disclosed herein is provided to be to allow one of ordinary skill in the art manufacture or using the present invention.Be apparent for the various improvement of these embodiments for one of ordinary skill in the art, the General Principle defined here can be applied to other embodiment and can not depart from essence of the present invention or scope.Therefore, the present invention will limit the embodiment illustrated here, but consistent with the maximum magnitude of principle disclosed herein and novel feature.

Claims (29)

1. a device for distributing system resource in a communications system, comprising:

Scheduler, data transmitting is carried out for the multiple terminal of execution cost of coming for information about based on multiple terminal, and for giving the channel in described multiple terminal distribution at least two channel sets, wherein each channel set comprises multiple channel, and the concrete mapping of launching free system resources to data with described multiple channel is associated, and wherein the described mapping of each channel set is pseudorandom relative to each described mapping remaining at least two channel sets described in described at least one subset of multiple channel, wherein each channel set is defined according to the channel trees of the hierarchy with described multiple channel,

Controller, for forming channel allocation for described multiple terminal;

Spatial processor, for according to the channel estimating of described terminal be will to overlapping terminals send data carry out spatial manipulation; And

Multiple transmitter unit, for being transmitted to described overlapping terminals by multiple antenna by the data that have passed through described spatial manipulation.

2. device as claimed in claim 1, wherein said channel trees comprises multiple primary channel and multiple compound channel, wherein said multiple primary channel is mapped to described free system resources, and wherein each compound channel is associated with at least two primary channels, and be mapped to the system resource for described at least two primary channels.

3. device as claimed in claim 1, each channel wherein distributed in the described channel trees of terminal limits the distribution of at least one other channel in described channel trees.

4. device as claimed in claim 1, wherein uses frequency hopping by the described multiple channel mapping in each channel trees to described free system resources.

5. device as claimed in claim 1, wherein the described mapping of each channel set is pseudorandom relative to each described mapping remaining at least two channel sets described in described multiple channel.

6. device as claimed in claim 1, the described multiple channel wherein in each channel set is mapped to a subset of free system resources described in each time slot.

7. device as claimed in claim 1, wherein said scheduler is used at least two channel sets described in selection in order, and for the described multiple channel allocation in each selected channel set being given at least one in described multiple terminal.

8. device as claimed in claim 1, wherein the described mapping of each channel set is common relative to each described mapping remaining in described multiple channel at least two channel sets described at least one.

9. device as claimed in claim 1, wherein each channel set comprises the multiple channel subset be associated with multiple subsets of described free system resources, and the overlapping channel subsets of wherein said at least two channel sets and channel map to the different pseudorandoms of system resource and be associated.

10. device as claimed in claim 1, wherein said scheduler is used for for switching terminal distributes the channel with the channel quadrature of non-switching terminal.

11. devices as claimed in claim 1, wherein said at least two channel sets are associated with at least two orthogonal pilot patterns, each channel set in connection with a pilot signal patterns, and wherein the pilot signal of multiple channel described in each channel set utilizes the described pilot signal patterns be associated with described channel set to generate.

12. devices as claimed in claim 1, wherein said scheduler is used for for switching terminal distributes the pilot signal patterns orthogonal with the pilot signal patterns of non-switching terminal.

13. devices as claimed in claim 1, wherein said scheduler is used for selecting terminal according to channel estimating, signal-Noise and Interference compared estimate, quality of service requirement or their overlapping transmission that is combined as.

14. devices as claimed in claim 1, also comprise:

Multiple receiver unit, for receiving multiple transmitting by described multiple antenna from described overlapping terminals; And

Described spatial processor also recovers described multiple transmitting for carrying out receiver space process according to the channel estimating of described overlapping terminals to the receiving symbol from described multiple antenna.

The method of distributing system resource in 15. 1 kinds of communication systems, comprising:

The multiple terminal of execution cost of coming for information about based on multiple terminal carries out data transmitting;

To the channel in described multiple terminal distribution at least two channel sets, wherein each channel set comprises multiple channel, and the concrete mapping of launching free system resources to data with described multiple channel is associated, and wherein the described mapping of each channel set is pseudorandom relative to each described mapping remaining at least two channel sets described in described at least one subset of multiple channel, wherein each channel set is defined according to the channel trees of the hierarchy with described multiple channel;

For described multiple terminal forms channel allocation;

According to the channel estimating of described terminal be will to overlapping terminals data send carry out spatial manipulation; And

By multiple antenna, the data that have passed through described spatial manipulation are transmitted to described overlapping terminals.

16. methods as claimed in claim 15, also comprise:

It is common for being become by the described mapping definition of each channel set relative to each described mapping remaining in described multiple channel at least two channel sets described at least one.

17. methods as claimed in claim 15, also comprise:

For switching terminal distributes the channel with the channel quadrature of non-switching terminal.

18. methods as claimed in claim 15, also comprise:

Terminal is selected according to channel estimating, signal-Noise and Interference compared estimate, quality of service requirement or their overlapping transmission that is combined as.

19. methods as claimed in claim 15, also comprise:

Multiple transmitting is received from described overlapping terminals by described multiple antenna; And

According to the channel estimating of described overlapping terminals, receiver space process is carried out to the receiving symbol from described multiple antenna and recover described multiple transmitting.

The device of 20. 1 kinds of distributing system resource in a communications system, comprising:

For carrying out based on multiple terminal the module that the multiple terminal of execution cost carries out data transmitting for information about;

For giving the module of the channel in described multiple terminal distribution at least two channel sets, wherein each channel set comprises multiple channel, and the concrete mapping of launching free system resources to data with described multiple channel is associated, and wherein the described mapping of each channel set is pseudorandom relative to each described mapping remaining at least two channel sets described in described at least one subset of multiple channel, wherein each channel set is defined according to the channel trees of the hierarchy with described multiple channel;

For forming the module of channel allocation for described multiple terminal;

For according to the channel estimating of described terminal being the module that the data that will send to overlapping terminals carry out spatial manipulation; And

For the data that have passed through described spatial manipulation being transmitted to by multiple antenna the module of described overlapping terminals.

21. devices as claimed in claim 20, also comprise:

The module of common mapping for the described mapping definition of each channel set being become relative to each described mapping remaining in described multiple channel at least two channel sets described at least one.

22. devices as claimed in claim 20, also comprise:

For being received the module of multiple transmitting from described overlapping terminals by described multiple antenna; And

For the channel estimating according to described overlapping terminals, the module that receiver space process recovers described multiple transmitting is carried out to the receiving symbol from described multiple antenna.

23. 1 kinds of devices receiving the system resource be assigned with in a communications system, comprising:

Controller, distribute for receive channel, launch for data, and for determining that described channel launches the mapping of free system resources to data, wherein said channel chooses from least two channel sets, wherein each channel set comprises multiple channel, and the concrete mapping of launching available described system resource to data with described multiple channel is associated, and wherein the described mapping of each channel set is pseudorandom relative to each described mapping remaining at least two channel sets described in described at least one subset of multiple channel, wherein each channel set is defined according to the channel trees of the hierarchy with described multiple channel, and

Processor, for processing data, to launch in the system resource being mapped to described channel.

24. devices as claimed in claim 23, wherein according to frequency-hopping mode by described channel mapping to described free system resources.

25. devices as claimed in claim 23, wherein said controller is also for determining and the pilot signal patterns that described channel is associated, and wherein said processor is also for generating pilot signal according to described pilot signal patterns.

26. devices as claimed in claim 23, wherein said controller is also for receiving the second distribution of second channel, for reception data, and for determining that described second channel is to the mapping receiving data free system resources, and wherein said processor is also for the treatment of being mapped to the data that the system resource of described second channel receives.

27. 1 kinds of devices receiving the system resource be assigned with in a communications system, comprising:

The module of launching for data is distributed for receive channel, wherein said channel chooses from least two channel sets, wherein each channel set comprises multiple channel, and the concrete mapping of launching free system resources to data with described multiple channel is associated, and wherein the described mapping of each channel set is pseudorandom relative to each described mapping remaining at least two channel sets described in described at least one subset of multiple channel, wherein each channel set is defined according to the channel trees of the hierarchy with described multiple channel,

For determining that described channel to launch the module of the mapping of available described system resource to data; And

For the module of transmitting data in the system resource being mapped to described channel.

28. devices as claimed in claim 27, also comprise:

For determining the module of the pilot signal patterns be associated with described channel; And

For generating the module of pilot signal according to described pilot signal patterns.

29. devices as claimed in claim 27, also comprise:

For receiving second channel second distributes the module for receiving data;

For determining the module of described second channel to the mapping of reception data free system resources; And

For receiving the module of data in the system resource being mapped to described second channel.