CN102625449A - System and method for adaptive channel access - Google Patents

Abstract

A base station and method for adaptive channel access in a wireless network are provided. The base station assigns a channel access scheme for providing channel access to service data, wherein at least a portion of the service data is assigned to one of a reserved common channel access scheme and an overlapping channel access scheme based on one or more characteristics of the network and one or more requirements of the service data. Network resources are then allocated according to the assigned channel access scheme. The service data is then transmitted using the allocated resources.

Description

The system and method that is used for the adaptive channel access

Technical field

The requirement that the invention relates to a kind of data that are used for characteristic Network Based and/or supply transmit is the system and method for the passage access of Control Network adaptively.

Background technology

In recent years communication network is used for transmitting and reception information increases, and is expected at foreseeable future and also can increases.Many factors have caused the use of this increase.At first, the cost of technological progress continuous decrease communication device, thus cause it extensively to be had and use.The second, along with the world continues globalization, need to cross over the long distance device of transmission information fast further.To such an extent as to the available network resource that progress of these technology and culture have caused the very big utilance of these devices to be used to the information that transmits is usually very nervous.Yet new and inspirer mechanics of communication continues to introduce, and might be widely used in people's the life.

Use growth along with communication network; Based on the mechanics of communication of a plurality of subcarriers (for example; OFDM (orthogonal frequency-division multiplexing; OFDM) and OFDM (orthogonal frequency-division multiple access, OFDMA)) realize popularizing owing to its extensive use.Fig. 1 explains how OFDM uses the quadrature subcarrier 101 of a plurality of tight spacings to transmit the data frequency curve.OFDM is provided for the carrier wave many times 101 of modulation data in the above, increases data processing amount thus.Some evenly spaced subcarriers 101 are grouped into the passage that is used to transmit data.Yet OFDM only allows user on the passage at any given time.

OFDMA is the multi-user OFDM that allows the same passage of a plurality of users access simultaneously.Fig. 2 explains the frequency curve of OFDMA, and it illustrates OFDMA and how signal is split into the sub-carrier group that is called subchannel, and assigns one group of subcarrier to each user.In instance illustrated in fig. 2, subcarrier 201 is grouped into a subchannel, and subcarrier 202 is grouped into another subchannel.Illustrated like the subcarrier among Fig. 2 202, subcarrier is grouped into subchannel need not the vicinity subcarrier is grouped into said subchannel.

Fig. 3 A explanation OFDM time-frequency resources distribution diagram 301.In OFDM, distribute time-frequency resources in the subcarrier level.Fig. 3 B explanation OFDMA time-frequency resources distribution diagram 302.In OFDMA, on the subchannel level, distribute time-frequency resources, wherein subchannel is the group of subcarrier.The time-frequency resources distribution is discussed by the unit that can be called time-frequency resources unit, and wherein each time-frequency resources unit is corresponding to the transmission resource of a subcarrier in the time slot (for example, time slot 303).Time-frequency resources unit is grouped into passage and subchannel, and it can be described as the time-frequency resources block.In OFDMA, can assign the group of subchannel to each user with the mode of ease up decline and interference problem based on each user's position and propagation characteristic.The expection of the popularization degree of OFDMA increases the flexible use of Internet resources owing to it in the future.

(Machine-to-machine, M2M) technology (being sometimes referred to as Machine Type communication (MTC) technology) is to be expected at the newer mechanics of communication that the several years in future become and more popularize to machine.The M2M technology comprises the spontaneous monitoring arrangement of transmission information.These technology for example use device such as transducer or instrument to capture for example incident such as temperature or inventory level.Information about institute's capture event then arrives the software application via network trunk.Said software application changes said incident into can be applied significant information, for example when said information indication stock is low, restocks.This technology is estimated to be widely used in the fields such as wisdom control of for example individual health care, traffic monitoring and control, crime supervision, power network.These technology are used in particular in the wireless application.Therefore, for example the practical application of technology such as these technology needs access consistently to wireless communication networks.So, two-forty, high coverage and high mobility cellular network system are the candidates that adapts to the requirement of M2M service request and other new mechanicss of communication.Third generation partner program (3rd Generation Partnership Project for example; 3GPP)), third generation partner program version 2 (3rd Generation Partnership Project Version 2; 3GPP2) (Institute of Electrical and Electronics Engineers 802.16 IEEE802.16) waits the wireless standard tissue all in the new plan that starts the M2M service of supporting the 4G standard with IEEE 802.16.

Fig. 4 explanation is used for the general networks structure 400 that the M2M service is used.M2M core network domain 401 bridge joints are between M2M device professional 402 and application domain 403.M2M core network domain 401 for example can comprise communication systems such as satellite, Wi-Fi, power line communication, cellular and other system.

According to the marketing report, the number that the M2M cellular network connects is anticipated 2014 and will be risen to 1.87 hundred million.Along with the number sustainable growth that network connects, the anxiety of cellular network resource will continue to increase.Yet, hope that the anxiety of this increase can not exert an influence to original cellular user.Therefore, the effective ways that need the communication channel that M2M device and other devices access cellular network under to the situation of original cellular user's minimum influence provides.

Summary of the invention

According to the present invention, a kind of method that is used for the adaptive channel access of wireless network is provided, said method comprises: one or more characteristics of monitoring wireless network; Base station through wireless network is assigned and is used to provide the passage access plan to the passage access of service data, wherein is assigned to one in common-use tunnel access plan and the superposition passage access plan of reservation based on one or more requirements of said one or more characteristics of said network and said service data and with at least a portion of said service data; According to the resource of the passage access plan distribution network of being assigned, wherein distribute said resource with resource block; And use the resource distributed and cause said service data to be sent out.

After being assigned to the common-use tunnel access plan of this reservation, said cause further to be included in keep into the transmission of service data but on one or more shared between network equipment passages, transmit the said part of said service data.

After being assigned to this superposition passage access plan, said distribution further comprises said service data is assigned at one or more passages that transmit the mobile station data, and with said service data superposition on said mobile station data.

Being assigned to this superposition passage access plan comprises and is assigned to one in an order foot superposition passage access plan (ranksufficient superimposed channel access scheme) and the rank defect superposition passage access plan (rank deficient superimposed channel access scheme).

Said service data superposition is being comprised on the selected resource block that said service data is dispersed in passage on the said mobile station data.

Resource block through selecting to have the signal power that is higher than determined threshold value is selected said selected resource block.

Transmit the resource block of the data streaming of the number that is lower than determined threshold value through selection and select said selected resource block.

Resource block through selecting to have forward error recovery (FEC) block of Duoing than determined threshold value is selected said selected resource block.

Said one or more characteristics of said wireless network comprise at least one in a passage load and the received signal intensity.

Said one or more of said service data require corresponding in service delay, burst sizes, packet size, data rate, transmission reliability and the burst error rate at least one.

According to the present invention, a kind of base station that adaptive wireless electric channel access (adaptive radio channel access) in the wireless network is provided is provided equally, said base station comprises: memory, its store instruction; And processor, its when execution command through being configured to: one or more characteristics of monitoring wireless network; Appointment is used to provide the passage access plan to the passage access of service data, wherein is assigned to one in common-use tunnel access plan and the superposition passage access plan of reservation based on one or more requirements of one or more characteristics of said network and said service data and with at least a portion of said service data; According to the resource of the passage access plan distribution network of being assigned, wherein distribute said resource with resource block; And use the resource distributed and cause said service data to be sent out.

After said service data being assigned to this superposition passage access plan, said processor is further through being configured to: said service data is assigned at one or more passages that transmit the mobile station data; And cause said service data superposition on said mobile station data.

Dispose said processor and further comprise the said processor of configuration said service data is assigned to one in an order foot superposition passage access plan and the rank defect superposition passage access plan said service data is assigned to this superposition passage access plan.

Dispose said processor with said service data is assigned to this superposition passage access plan further comprise the said processor of configuration with through on the selected resource block that said service data is dispersed in passage and with said service data superposition on said mobile station data.

Dispose said processor with said service data is assigned to this superposition passage access plan further comprise the said processor of configuration with the resource block selecting to have the signal power that is higher than determined threshold value to be used for superposition.

Dispose said processor with said service data is assigned to this superposition passage access plan further comprise the said processor of configuration with the resource block of data streaming of number selecting to be lower than determined threshold value in transmission to be used for superposition.

Dispose said processor with said service data is assigned to this superposition passage access plan further comprise the said processor of configuration with the resource block selecting to have forward error recovery (FEC) block of Duoing than determined threshold value to be used for superposition.

Said one or more spectral characteristics of said wireless network comprise at least one in a passage load and the received signal intensity.

Said one or more of said service data require corresponding in service delay, burst sizes, packet size, data rate, transmission reliability and the burst error rate at least one.

Further according to the present invention, a kind of method that is used for the adaptive wireless electric channel access of wireless network is provided, said method comprises: one or more characteristics of monitoring wireless network; Base station through wireless network is assigned based on one or more requirements of said one or more characteristics of said network and service data and is used to provide the passage access plan to the passage access of service data; Wherein said appointment comprises: indicate the passage that has enough frequency ranges being exclusively used in one or more reservations of network equipment to upload in said one or more network characteristics and take under the affair data conditions, said service data is assigned to one or more reservations and special-purpose passage; And upload at the passage that said one or more network characteristics indication does not have enough frequency ranges being exclusively used in one or more reservations of network equipment and to take under the affair data conditions; Confirm substituting channel assigning; Wherein saidly confirm further to comprise: when said one or more require the part of indication service datas to have the priority greater than determined threshold value, the said part of service data is assigned the passage to one or more reservations that are exclusively used in network equipment; And be assigned to one in common-use tunnel access plan and the superposition passage access plan of reservation based on said one or more requirements of said one or more characteristics of said network and said service data and with the remainder of said service data; According to the resource of the passage access plan distribution network of being assigned, wherein distribute said resource with resource block; And use the resource distributed and cause said service data to be sent out.

Before explained in detail at least one embodiment of the present invention, should be understood that statement in details that application of the present invention is not limited to construct and the following description or graphic in the layout of explanation.The present invention also allows other embodiment except described embodiment, and can put into practice in every way and carry out.And, should be understood that the wording used in this paper and the summary and term be should be regarded as for purposes of illustration and not restrictive.

Accompanying drawing is incorporated in this specification and is formed the part of this specification, description of drawings some embodiment of the present invention and together with describing content in order to explain principle of the present invention.

So, be understood by those skilled in the art that, the present invention based on notion can be easily as the basis that is designed for other structures, method and/or the system that carry out some purposes of the present invention.Therefore, recognize importantly that claims should be regarded as comprising this type of equivalent constructions, as long as it does not break away from the spirit and scope of the present invention.

Description of drawings

Fig. 1 explains how OFDM uses a plurality of exemplary subcarriers to transmit the data frequency curve.

Fig. 2 explains how OFDMA is split into the exemplary sub-carrier group that is called subchannel with signal and assigns the frequency curve of one group of subcarrier to each user.

Fig. 3 A explains exemplary OFDM time-frequency resources distribution diagram.

Fig. 3 B explains another exemplary OFDMA time-frequency resources distribution diagram.

Fig. 4 explanation is used for the demonstration network structure that the M2M service is used.

Fig. 5 explains the exemplary wireless network environment that one of them or an above mobile station and one or more extra communication devices coexist.

Fig. 6 explanation is in order to transmit the exemplary solution of data on the heavy duty passage.

Fig. 7 explains exemplary radio passage access plan of the present invention.

Fig. 8 explanation is used to assign the exemplary method of radio channel access plan.

The exemplary characteristics that Fig. 9 explanation is considered when assigning the radio channel access plan.

Figure 10 explanation is used for the example embodiment of M2M data superposition on original mobile station data.

The exemplary power spectrum density of the signal that Figure 11 explanation is received by the base station (power spectrumdensity, PSD).

Figure 12 explains the instance of selecting resource block based on the number of the forward error recovery in the resource block (FEC) code.

Figure 13 explanation is used in wireless network environment, transmitting and receiving the exemplary base station of data.

Description of reference numerals

101,201,202: subcarrier

301:OFDM time-frequency resources distribution diagram

302:OFDMA time-frequency resources distribution diagram

303: time slot

400: be used for the general networks structure that the M2M service is used

The 401:M2M core network domain

The 402:M2M device is professional

403: application domain

500: wireless network environment

501: mobile station

502:M2M device/communication device/device

503-1,503-2: wireless network

504: the base station

601: channel resource distributes

602: the mobile station data

The 603:M2M data

604: channel resource distributes

The 605:M2M data

606: channel resource distributes

701: keep and special-purpose passage access plan

702: keep and shared passage access plan

703: the passage access plan of superposition

704: the passage access plan of order foot superposition

705: the passage access plan of rank defect superposition

801～805: step

1001: low data rate and low-power M2M data transmit

1002: two-forty and high power mobile station data

1101-1,1101-2:M2M data

1102: the mobile station data

1201: block

1202: resource block

1300: the base station

1301: receiver

1302: conveyer

1303,1304: antenna

1305: processor

1306: memory

1307: network interface

RS: order foot superposition transmits

RD: the rank defect superposition transmits

FB1～FB4: forward error recovery block

Embodiment

Existing reference in detail current embodiment of the present invention, its some instance of explanation in the accompanying drawing.

Fig. 5 describes the example embodiment of wireless network environment 500.In environment 500, provide one or more mobile stations 501 of Communications service can coexist and on wireless network 503-1 or 503-2, transmit data via one or more base stations 504 with one or more extra means 502.In an example embodiment, wireless network 503-1 and 503-2 are cellular network (cellular network), but the invention is not restricted to this.Mobile station 501 can comprise (for example) mobile phone, intelligence telephone, PDA(Personal Digital Assistant), notebook computer, panel computer, mini notebook computer and/or other running gears that can communication on wireless network 503-1/503-2.Device 502 can comprise any one in the mobile station of the type that preceding text mention, and/or can comprise in addition can communication on wireless network 503-1/503-2 fixture.Device 502 can provide multiple Communications service, comprises voice, video, urgent warning and/or other data, services.In an example embodiment illustrated in fig. 5, communication device 502 can comprise M2M or MTC communication device.The M2M device can provide and be included in the Communications service that wireless network 503-1/503-2 uploads warp let-off monitoring events.These incidents can comprise (for example) inventory level, temperature, the information about traffic, health, crime, power line through keeping watch on, or the information of any other type.In the present invention in full, be called the M2M device although install 502, the invention is not restricted to this.In an example embodiment, can use and adopt the agreement of OFDMA scheme (for example, WiMAX) to upload carry information at wireless network 503-1/503-2.Quadrature amplitude modulation (Quadrature Amplitude Modulation; QAM) or QPSK (Quadrature Phase-Shift Keying; QPSK) modulation schemes can be used for the data on the subchannel of modulation OFDMA signal, but the invention is not restricted to this.

Fig. 6 describes in order on the heavy duty passage in the wireless network (for example, network 503-1/503-2), to transmit the exemplary solution of data.Channel resource distribution 601 distributes the available channel resource to be used to transmit mobile station data 602 and extra communication data (for example, M2M data 603) with caption, and wherein M2M data 603 transmit on designated lane.Possibly there is not the situation of the enough channel resources that can be used for M2M data 605 in channel resource distribution 604 with caption.In this case, conveyer can wait for that till having enough resources to use, but this is not desirable solution.In some situations, possibly not have the data of enough resources to it possibly be time-sensitive data (time sensitive data), and these data can need to transmit fast.For instance, M2M data 605 possibly be the data of report emergency (for example, earthquake).Therefore, comparatively ideal solution possibly be to distribute illustrated and distribute data in 606 like channel resource.Distribute in 606 at channel resource, but the said part superposition that M2M data 605 are split into several portions and data is on the time-frequency resources block that is occupied by the mobile station data.Therefore, needn't time of delay the transmission of sensitive data.

Fig. 7 description time-frequency diagram, it illustrates exemplary radio passage access plan of the present invention, and explanation M2M device can be how and the instance of the shared radio channel of mobile station.It should be noted that Fig. 7 only from the purpose of explaination, and the time-frequency resources block needn't be an adjacency in time or frequency domain.In addition, the explanation of the foot of the order among Fig. 7 (rank-sufficient) superposition transmission RS and rank defect (rank-deficient) superposition transmission RD is only from the purpose of explaining.

In the passage access plan 701 of reservation and special use, the specific M2M service data that the base station 504 of wireless network 503-1/503-2 can be single device keeps one or more T/F passages.The result is, possibly not have mutual interference mutually between the M2M device that transmits the M2M service data and the mobile station of transmission mobile station data.

Keep and shared passage access plan 702 in, the base station 504 of wireless network 503-1/503-2 can be the M2M data and keeps one or more T/F passages, can shared said one or more passages but transmit many devices of M2M data.Therefore, can there be conflict in different M2M between transmitting, but the mobile station transmission will can not disturb M2M to transmit.

In the passage access plan 703 of superposition, base station 504 can be assigned to one or more passages that possibly occupied by mobile station with M2M professional (traffic).As shown in Figure 7, the M2M data of superposition overlap with the mobile station data in the passage access plan 703 of superposition.Possibly exist and be used for the professional superposition of M2M operational at least two kinds of different passage access plans of platform in action.First scheme can comprise the passage access plan 704 of order foot superposition.In the passage access plan 704 of order foot superposition, (multiple-input and multiple-output, MIMO) channel space order (channel spatial ranks) is to support the excessive data crossfire with many outputs can to have enough many inputs.Alternative plan can comprise the passage access plan 705 of rank defect superposition.In the passage access plan 705 of rank defect superposition, possibly not exist enough MIMO channel space orders to support the excessive data crossfire.Term " order " refers to sometime-number of the spatial channel born of frequency resource block, and the order number can be depending on the available transmission antenna at the device place that transmits data number, receive the number of reception antenna at the device place of data and propagation conditions.In the passage of order foot superposition, can bear the spatial flow number can be greater than the sum of the stream that transmits in one or more time-frequency resources blocks.In the passage of rank defect superposition, can bear the spatial flow number can less than in one or more time-frequency resources blocks the sum of the stream that transmits (transmitted streams).The superposition passage can strengthen the flexibility of channel allocation, especially when wireless network possibly need Backup the transmission of a large amount of M2M devices.That is the number that, the sum of the stream of mobile station and M2M device can be supported greater than MIMO passage order on one or more time-frequency resources blocks.

Fig. 8 describes to be used to carry out the flow chart of the exemplary method 800 of the embodiment that this paper discloses.In step 801, the base station can be granted some M2M data of support and transmitted.In step 802, the base station can determine whether to exist enough resource block supports to be used for reservation and special-purpose passage access plan that all M2M data transmit.If there are enough resource block (for example, offered load is lighter) (step 802-is), in step 803, can all M2M data be assigned to one or more reservations and special-purpose passage and transmission above that so.

If there are not enough resource block (for example, offered load is heavier) (step 802-is not), the base station can confirm that which person in the M2M business has the priority greater than the specific threshold priority in step 804 so.If there is available resource block, can at least some of said available resources block be assigned as being used to have above one or more reservations of the M2M data service of the single device of the priority of threshold value priority and the passage of special use so.The professional priority of M2M can be by the field in the M2M data itself, the header (header) or the footnote (footer) of M2M data, and/or indicates from the independent order of M2M device or other devices.Can confirm the priority threshold value through the M2M data being carried out ranking (ranking) and setting threshold, make to have the Internet resources that are used for transmitting with the priority that is higher than threshold value the abundance of all M2M data at the passage of one or more reservations and special use.Perhaps, the priority threshold value can be through confirming and being stored in the base station in advance in advance.Priority also can be set up based on the network characteristic of the device that transmits data and/or the service request of data.For instance, high-priority data can be have high reliability, the data of high data rate and/or the low requirement that postpones.Certainly, the invention is not restricted to this, and any other suitable method with the data separation priority can be utilized with the present invention.

No matter whether some in the M2M data service are assigned to one or more reservations and special-purpose passage in step 804, the remainder of M2M data service (if any) all can distribute in step 805.In step 805, can confirm the M2M data service remainder service request and/or transmit the network characteristic of the M2M device of M2M data service.This remainder of M2M data service can be then be assigned to one of other passage access plans that preceding text discuss referring to Fig. 7 based on M2M data service service request and/or with the apparatus associated network characteristic of M2M.That is, the remainder of M2M data service can be assigned to according to service request and/or network characteristic and keep at least and shared passage access plan, the passage access plan of order foot superposition, and/or the passage access plan of rank defect superposition.

Passage access type of the present invention can provide different link quality and propagation delay.In order effectively to utilize these difference, can distribute M2M professional based on M2M data service service request and/or network characteristic, as stated.Fig. 9 explains some characteristics that base station 504 can be kept watch on and when selecting the special modality allocative decision, consider.In general, if there is sufficient available resources block, base station 504 can distribute one or more resource block as being used for one or more professional reservations of all M2M and special-purpose passage so.Otherwise the base station can distribute some resource block to have professional one or more reservations and the special-purpose passage of M2M above the priority of priority threshold value as being used to.Can be then remaining M2M data service be assigned to the common-use tunnel of reservation, the passage of order foot superposition according to the M2M service request and/or the network characteristic of correspondence, and/or the passage of rank defect superposition.Therefore, can be to having low reliability, low data rate (or less burst sizes (burst size)) and/or the low professional passage that adopts superposition of M2M that postpones service request.Also can be directed against the passage of the M2M The data superposition of strict limited delay, to avoid waiting for that the long period M2M passage of reservation just becomes available.

The M2M service request that base station 504 is considered can comprise and postpone to require and/or transmit reliability (or burst error rate) requirement (for example) service time.The data rate of burst sizes, packet size and/or M2M data also can be considered in base station 504.Yet, the invention is not restricted to this, and can data allocations considered other data characteristics and/or requirement during to dissimilar passages (as stated).Based on various service requests, the passage access plan how base station 504 can be confirmed the M2M data allocations is mentioned to preceding text is so that satisfy various service requests wholly or in part.

The network characteristic that base station 504 is considered when confirming how to distribute the M2M data service can comprise passage load characteristic and/or signal strength characteristics.The passage load characteristic can comprise confirms whether offered load is heavy.If offered load is lower, base station 504 can be assigned to the M2M data and keep and special-purpose passage access plan and/or reservation and shared passage access plan so.When offered load was heavier, base station 504 can be assigned to the M2M data passage access plan of superposition, made that channel resource can be professional shared with the M2M device by original cellular mobile station, so avoided waiting for the delay that the M2M passage of reservation becomes available.

The signal strength characteristics that the base station is considered can comprise M2M or mobile station data service the signal strength signal intensity that is received indication (received signal strength indication, RSSI).RSSI can be depending on the channel gain (for example, extensive and decline on a small scale) and/or the delivering power of M2M device or mobile station.M2M or mobile station data signal strength can directly be measured by base station 504, and/or can be by M2M device or mobile station via feedback/back coupling passage to carry out feedback/back coupling.

In case Internet resources are by base station assigns, the base station just can send to resource allocation policy other devices of one or more M2M devices and/or transmission service data.The resource allocation that resource allocation policy definition base station is confirmed, and indicate said one or more devices to transmit service data according to determined resource allocation.

Figure 10 explanation is used for the M2M data superposition example embodiment on the platform data in action.In general, compare can be less for the data packet size of professional burst sizes of M2M and mobile station communication (for example, cellular voice and data communication).In addition, M2M transmits possibly need low-power to transmit because low-power transmit provide battery powered M2M device than long battery life.Therefore, the M2M communication can have low data rate and low power characteristic.Therefore, even under the rank defect channel condition, but data also superposition on original mobile station data symbol.In embodiment illustrated in fig. 10; The data symbol (being represented by S1, S2 and S3) of low data rate and low-power M2M data transmission 1001 can repeat and redundant be assigned to a plurality of time-frequency resources units, and said time-frequency resources unit possibly also be assigned to two-forty and high power mobile station data 1002 (being represented by D1-D27).As illustrated, the M2M data can repeat and redundant ground than two-forty mobile station data scatter in more resources unit.For instance, each among M2M data S1, S2 and the S3 is dispersed on nine resource units.This also explains in Figure 11, illustrates M2M data 1101-1/1101-2 among Figure 11 and can have the power that lacks than mobile station data 1102, and may be interspersed within than on the wide time-frequency resources unit's scope of mobile station data 1102.

If the receiver of base station 504 is equipped with than the desired reception antenna of Duoing of superposition stream; And if/or passage is in and enriches under the diffusion conditions; Mobile station data that received so and M2M data can be assigned to order foot superposition scheme; And said data can be by conventional MIMO detector (for example, vertical-(Vertical-Bell Laboratories Layered Space-Time, V-BLAST) or sphere decoder (sphere decoder)) joint-detection during dblast.In order foot superposition scheme, even the M2M data do not spread to a plurality of time-frequency resources units, receiver also can detect mobile station and M2M data simultaneously.

If the receiver of base station 504 is equipped with than superposition and flows the desired reception antenna that lacks, and if/or passage be under the obigotrophic condition (for example, the non-diffusional environment that enriches), low rate M2M data are spreadable to a L time-frequency resources unit so.For instance, only have a reception antenna and mobile station and M2M device in base station 504 and just in same superposition T/F passage, transmit in the situation of single stream separately, the signal that 504 places, base station receive can be expressed as by mathematical way:

y ₀＝h _d，0d ₀+h _s，0s+w ₀

.

.

.

y _L-1＝h _d，L-1d _L-1+h _s，L-1s+w _L-1

y＝H _dd+sh _s+w

Wherein y=[y0 ..., yL-1] T, d=[d0 ..., dL-1] T and w=[w0 ..., wL-1] and the superposition signal that T representes respectively to be received, the signal that mobile station transmits and the vector form of hot noise.Symbol s representes to be dispersed in the data that L the M2M on the resource units transmits.Vector form Hd=diag{hd, 0 ..., hd, L-1} and hs=[hs, 0 ... Hs, L-1] T representes passage and the gain of the passage between base station and the M2M device between base station and the mobile station respectively.

Mobile station data and M2M data can be used by base station 504 and adopt the maximum likelihood detector of Maximum Likelihood Detection algorithm to detect, for example

${\tilde{x}}^{*}=\arg \underset{\tilde{x}}{\min }\underset{n=0}{\overset{L-1}{\mathrm{\Σ}}}{|y_n-h_{d,n}{d}_n-{\mathrm{sh}}_{s,n}|}^2$

$=\arg \underset{\tilde{x}}{\min }\underset{n=0}{\overset{L-1}{\mathrm{\Σ}}}({|y_n-h_{d,n}{d}_n|}^2+{\left|{\mathrm{sh}}_{s,n}\right|}^2-2\mathrm{Re}\{(y_n-h_{d,n}{d}_n)s^{*}{h}_{s,n}^{*}\left\}\right)$

The maximum likelihood that wherein

and

is

is separated, and AWGN is the acronym of additive white gaussian noise.Yet, what Maximum Likelihood Detection maybe be for computation-intensive.

Replace in maximum likelihood detector; Or except that maximum likelihood detector; Base station 504 is also capable of using, and (successive interference cancellation, detector SIC) come mobile station and M2M data streaming are decoded based on Successive Interference Cancellation.This can be possible, because low rate M2M data may be interspersed within the L time-frequency resources unit, and the delivering power of M2M data can reduce in each time-frequency resources unit, makes the M2M data can ease up to the interference that the mobile station data cause.The receiver of base station 504 can at first be treated to hot noise with low-power data and high power M2M data are decoded.Then, can deduct from the superposition signal that is received through the decoding high power mobile station data.At last, can decode to low rate and low-power M2M data.This formula can be carried out to obtain better performance repeatedly.

Base station 504 also can be made about how distributing the M2M data so that ease up and on the same asset block that is occupied by mobile station, transmitted the further definite of disturbing effect that low rate and low-power M2M data cause.In an example, base station 504 can select one or more resource block to be used for superposition with the relative intensity of the signal strength signal intensity of M2M reception based on the signal strength signal intensity that mobile station receives.For instance, if the received signal intensity that the mobile station in one or more resource block transmits surpasses a certain threshold value of the received signal intensity of M2M transmission, base station 504 can select said one or more resource block to be used for superposition so.Do the minimize interference that the M2M signal is caused like this to the mobile station data.Said threshold value can be the predetermined difference between the received signal intensity, can be the minimum rate between the received signal intensity, or can be the comparison of any other form.

In second instance, can be based on the number of the data streaming that just in one or more resource block, is transmitting and selects said one or more resource block to be used for superposition in base station 504.For instance, the number of the base station 504 mobile station data streaming that can select wherein just on one or more resource block, to transmit is lower than said one or more resource block of threshold value.In one embodiment, said threshold value can be set at the number of the reception antenna at 504 places, base station.In another embodiment, said threshold value can be predetermined number.In another embodiment, the number that can be based on the data streaming that transmits in each resource block carries out ranking to resource block, and one or more resource block of minimum data crossfire number can at first be selected to have in the base station.Therefore, select resource block through the number based on the data streaming that just in each resource block, is transmitting, base station 504 can be forced preferentially order foot superposition passage with respect to rank defect superposition passage.

Figure 12 explains the 3rd instance of selecting resource block.In this example, base station 504 can be based on forward error recovery (forward errorcorrection, FEC) number of block and select said one or more resource block of the mobile station data in one or more resource block.For instance, said one or more resource block can be selected based on the number of the FEC block in one or more resource block in base station 504 whether greater than threshold value.Said threshold value can be predetermined value.Perhaps, can be based on how many FEC blocks being arranged in each resource block and resource block is carried out ranking, and one or more resource block of maximum FEC number of blocks can at first be selected to contain in the base station.The FEC block need not to be completely contained in the resource block so that the number of FEC block is counted.For instance, in Figure 12, resource block 1202 contains four different FEC blocks (fragment of FB1～FB4), but do not contain whole FEC block.Yet,, select resource block 1202 with respect to the resource block (for example, block 1201) that contains less FEC block (even it is complete FEC block).Through with the resource block of M2M data allocations, can reduce the interference that on each FEC block, causes owing to M2M data superposition to a plurality of FEC blocks with mobile station data.

Those skilled in the art it should be understood that at present and can use any combination that is used for confirm selecting the instance which resource block mentions with the preceding text that are used for superposition.For instance, one or more resource block can be selected based on signal power, data streaming number and FEC number of blocks in base station 504.Perhaps, base station 504 can adopt above-described first, second with the 3rd instance in both, perhaps one in these three instances.Base station 504 can be any order adopt whole or some instances in these three instances, and the resource block that can adopt one or more in the said instance to come to be used for another instance selection that resource block selects from previous use is selected.Yet, the invention is not restricted to this.

Figure 13 describes to be used in wireless network environment 500, transmitting and receiving the exemplary base station 1300 of data.Base station 1300 can be huge honeycomb, miniature honeycomb, slight honeycomb or femto honeycomb base station.The data-signal that transmits from mobile station 501, M2M device 502 and/or other networks can be received and treated at receiver 1301 places at antenna 1303.Data-signal is can be at conveyer 1302 places treated and be sent to mobile station 501, M2M device 502 and/or other network equipments from antenna 1304.Processor 1305 can be the processor of any suitable type.The function of processor 1305 can provide by single application specific processor or by a plurality of processors.Processor 1305 can be couple to receiver 1301, conveyer 1302 and memory 1306.Processor 1305 also can be couple to network interface 1307, is used for receiving order and information and/or transmitting to processor and to order and information from processor.Processor 1305 can via for example universal serial bus (USB), second too cable networks such as net, world-wide web, live wire, twisted-pair feeder, coaxial cable or other cable networks receive order and/or transmit order from other devices to other devices.Processor 1305 or can order with wireless mode reception/transmission via cellular, satellite, IEEE 802.11, land or other wireless networks.Processor 1305 also can be couple to computer, and it provides user interface, and said user interface allows information and order are input to processor and/or permission output information and order (with the human-readable form).

Memory 1306 can be through being configured to store instruction, and the exemplary steps of the embodiment that is disclosed is carried out in said instruction when being carried out by processor 1305.But memory 1306 is storage operation system, application and/or parameter also.The data that are stored in the memory 1306 can be stored in single private memory or a plurality of storage arrangement.Memory 1306 can be the physical storage of any kind, non-temporary storage, volatility or non-volatility memorizer, comprises (but being not limited to) random-access memory (ram), the read only memory (ROM), magnetic storage device, semiconductor storage, laser disc storage device and/or magnetic-laser disc storage device.

Be understood by those skilled in the art that aforesaid embodiments of the invention can be used in the multiple application.The system and method that is used for the adaptive radio channel allocation can be used for other wireless environments of cellular environment, WiMAX environment or any number.Be used for the wherein environment of M2M device and mobile station coexistence although be disclosed as, the invention is not restricted to this.Except the M2M device or replace the device in M2M, other can transmit on the wireless network and the device of the information of reception also can coexist as on the network with mobile station.These other devices can comprise PC, server, PDA, panel computer, mini notebook computer, E-book reader, mobile phone, intelligence telephone, or any other device that can on wireless network, transmit.The embodiment that is used for the adaptive radio channel allocation of the present invention can be through the one or more radio channel access of implementing to install these other to grant.

Many feature and advantage of the present invention are obvious from detail specifications, and hope therefore that appended claims is contained and drop on true spirit of the present invention and interior all these type of feature and advantage of the present invention of scope.In addition; Owing to it will be apparent to those skilled in the art that numerous modifications and variation; So do not hope to limit the invention to definite structure and operation illustrated and description, and therefore, can take within the scope of the invention all suitable modifications and equivalent.

Claims (21)

1. method that is used for the adaptive channel access of wireless network, said method comprises:

Keep watch on one or more characteristics of said wireless network;

Base station through said wireless network is assigned and is used to provide the passage access plan to the passage access of service data, wherein based on one or more requirements of said one or more characteristics of said wireless network and said service data at least a portion of said service data is assigned to one in the common-use tunnel access plan that keeps and the superposition passage access plan;

According to the resource that the passage access plan of being assigned distributes said wireless network, wherein distribute said resource with resource block; And

Use the resource of being distributed and cause said service data to be sent out.

2. the method that is used for the adaptive channel access of wireless network as claimed in claim 1; It is characterized in that; After being assigned to the common-use tunnel access plan of this reservation, said cause further to be included in keep into the transmission of service data but on one or more shared between network equipment passages, transmit the said part of said service data.

3. the method that is used for the adaptive channel access of wireless network as claimed in claim 1; It is characterized in that; After being assigned to this superposition passage access plan; Said distribution further comprises said service data is assigned at one or more passages that transmit the mobile station data, and with said service data superposition on said mobile station data.

4. the method that is used for the adaptive channel access of wireless network as claimed in claim 1 is characterized in that, is assigned to this superposition passage access plan and comprises and be assigned to one in an order foot superposition passage access plan and the rank defect superposition passage access plan.

5. the method that is used for the adaptive channel access of wireless network as claimed in claim 3 is characterized in that, said service data superposition is being comprised on the selected resource block that said service data is dispersed in passage on the said mobile station data.

6. the method that is used for the adaptive channel access of wireless network as claimed in claim 5 is characterized in that, selects said selected resource block through the resource block of selecting to have the signal power that is higher than determined threshold value.

7. the method that is used for the adaptive channel access of wireless network as claimed in claim 5 is characterized in that, transmits the resource block of the data streaming of the number that is lower than determined threshold value through selection and selects said selected resource block.

8. the method that is used for the adaptive channel access of wireless network as claimed in claim 5 is characterized in that, selects said selected resource block through the resource block of selecting to have forward error recovery (FEC) block of Duoing than determined threshold value.

9. the method that is used for the adaptive channel access of wireless network as claimed in claim 1 is characterized in that, said one or more characteristics of said wireless network comprise at least one in a passage load and the received signal intensity.

10. the method that is used for the adaptive channel access of wireless network as claimed in claim 1; It is characterized in that said one or more of said service data require corresponding in service delay, burst sizes, packet size, data rate, transmission reliability and the burst error rate at least one.

11. the base station that the adaptive wireless electric channel access in the wireless network is provided, said base station comprises:

One memory, its store instruction; And

One processor, its when carrying out said instruction through being configured to:

Keep watch on one or more characteristics of said wireless network;

Appointment is used to provide the passage access plan to the passage access of service data, wherein based on one or more requirements of one or more characteristics of said wireless network and said service data at least a portion of said service data is assigned to one in the common-use tunnel access plan that keeps and the superposition passage access plan;

According to the resource that the passage access plan of being assigned distributes said wireless network, wherein distribute said resource with resource block; And

Use the resource of being distributed and cause said service data to be sent out.

12. the base station that the adaptive wireless electric channel access in the wireless network is provided as claimed in claim 11; It is characterized in that; Be assigned to the common-use tunnel access plan of this reservation in the part with said service data after, said processor further keeps in the transmission for service data but on one or more shared between network equipment passages, transmits the said part of said service data through being configured to cause.

13. the base station that the adaptive wireless electric channel access in the wireless network is provided as claimed in claim 11 is characterized in that, after said service data being assigned to this superposition passage access plan, said processor is further through being configured to:

Said service data is assigned at one or more passages that transmit the mobile station data; And

Cause said service data superposition on said mobile station data.

14. the base station that the adaptive wireless electric channel access in the wireless network is provided as claimed in claim 11; It is characterized in that, dispose said processor and further comprise the said processor of configuration said service data is assigned to one in an order foot superposition passage access plan and the rank defect superposition passage access plan said service data is assigned to this superposition passage access plan.

15. the base station that the adaptive wireless electric channel access in the wireless network is provided as claimed in claim 14; It is characterized in that, dispose said processor with said service data is assigned to this superposition passage access plan further comprise the said processor of configuration with through on the selected resource block that said service data is dispersed in passage and with said service data superposition on said mobile station data.

16. the base station that the adaptive wireless electric channel access in the wireless network is provided as claimed in claim 15; It is characterized in that, dispose said processor with said service data is assigned to this superposition passage access plan further comprise the said processor of configuration with the resource block selecting to have the signal power that is higher than determined threshold value to be used for superposition.

17. the base station that the adaptive wireless electric channel access in the wireless network is provided as claimed in claim 15; It is characterized in that, dispose said processor with said service data is assigned to this superposition passage access plan further comprise the said processor of configuration with the resource block of data streaming of number selecting to be lower than determined threshold value in transmission to be used for superposition.

18. the base station that the adaptive wireless electric channel access in the wireless network is provided as claimed in claim 15; It is characterized in that, dispose said processor with said service data is assigned to this superposition passage access plan further comprise the said processor of configuration with the resource block selecting to have forward error recovery (FEC) block of Duoing than determined threshold value to be used for superposition.

19. like claim 11 base station of stating that the adaptive wireless electric channel access in the wireless network is provided; It is characterized in that said one or more spectral characteristics of said wireless network comprise at least one in a passage load and the received signal intensity.

20. the base station that the adaptive wireless electric channel access in the wireless network is provided as claimed in claim 11; It is characterized in that said one or more of said service data require corresponding in service delay, burst sizes, packet size, data rate, transmission reliability and the burst error rate at least one.

21. a method that is used for the adaptive wireless electric channel access of wireless network, said method comprises:

Keep watch on one or more characteristics of said wireless network;

Base station through said wireless network is assigned based on one or more requirements of said one or more characteristics of said wireless network and service data and is used to the passage access plan to the passage access of said service data is provided, and wherein said appointment comprises:

Having enough frequency ranges being exclusively used on the passage of one or more reservations of network equipment in the said characteristic indication that one or more are associated with said wireless network transmits under the situation of said service data, said service data is assigned to one or more reservations and special-purpose passage; And

Being associated with the indication of said wireless network characteristic at said one or more does not have enough frequency ranges being exclusively used on the passage of one or more reservations of network equipment to transmit under the situation of said service data; Confirm a substituting channel assigning, wherein saidly confirm further to comprise:

When said one or more require the part of the said service data of indication to have the priority greater than determined threshold value, the said part of said service data is assigned the passage to one or more reservations that are exclusively used in network equipment, and

Based on said one or more requirements of said one or more characteristics of said network and said service data the remainder of said service data is assigned to one in the common-use tunnel access plan that keeps and the superposition passage access plan;

According to the resource that the passage access plan of being assigned distributes said network, wherein distribute said resource with resource block; And

Use the resource of being distributed and cause said service data to be sent out.

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