CN101803178A

CN101803178A - Method of translating cellular carriers

Info

Publication number: CN101803178A
Application number: CN200880022528A
Authority: CN
Inventors: 荒山吉行; 野口真一; 拉瑞·本滕·理查德; 西奥多·塞泽
Original assignee: Lucent Technologies Inc
Current assignee: Origin Asset Group Co ltd; Nokia of America Corp
Priority date: 2007-06-28
Filing date: 2008-06-26
Publication date: 2010-08-11
Anticipated expiration: 2028-06-26
Also published as: EP2174414A2; CN101803178B; WO2009005681A3; KR20100036265A; KR101149779B1; JP5528335B2; WO2009005681A2; JP2011517371A

Abstract

A plurality of carrier signals in a wide band signal is converted (100) into a plurality of digital carrier signals. Each of the plurality of carrier signals is at a respective frequency in the wide band signal. At least one of the plurality of digital carrier signals is translated (300) to a different frequency.

Description

The method of translating cellular carriers

Prioity claim

This non-interim U.S. Patent application require under U.S.C. § 119, the original submission date is the U.S. Provisional Patent Application No.61/007 on June 28th, 2007,907 priority.U.S. Provisional Patent Application No.61/007, the 907th, U.S. Patent application No.11/819 on October 18th, 2007 from submitting on June 28th, 2007,619 convert, and the full content of these two applications all is incorporated into this.

Background technology

In Radio Network System (for example, code division multiple access (CDMA) network), the frequency spectrum of specified quantitative can be used for system.The amount of the bandwidth of frequency spectrum can be according to standard, government regulation of management Radio Network System or the like and different.The position of the bandwidth of being distributed in frequency spectrum also can be according to standard, government regulation of management Radio Network System or the like and different.In addition, the position of the amount, bandwidth that can depend on the bandwidth of being distributed by the number of the carrier wave of the bandwidth support that is distributed in frequency spectrum, standard or the like.

For example, the cdma system of a 5MHz comprises three (3) individual carrier waves, and each carrier wave takies the 1.25MHz in the 5MHz bandwidth respectively.Radiofrequency signal with carrier frequency band of 1.25MHz bandwidth can keep 64 channels of as many as (voice or data).

In system, the position of the amount of the bandwidth assignment carrier wave in the bandwidth of being distributed, the bandwidth of being distributed and the bandwidth of being distributed is fixed.That is, be example with the cdma system of above-mentioned 5MHz, two different 5MHz cdma systems can have different carrier frequency bands and distribute, and/or can have the 5MHz bandwidth of diverse location.

Because some assemblies (for example, receiver etc.) of wireless system depend on the bandwidth of being distributed, the bandwidth of being distributed in intrasystem position, bandwidth assignment or the like, so these assemblies of wireless system can be system-specific usually.That is, the assembly of a system is disabled in another system usually.This flexibility lacks the design that causes wireless system components and makes last cost higher.

Summary of the invention

Example embodiment of the present invention provides a kind of method of translating cellular carriers.

In example embodiment, a kind of method of translating cellular carriers comprises: convert a plurality of carrier signals in the broadband signal at least one independent digital carrier signal, each in described at least one independent carrier signal is in the corresponding frequencies place in the broadband signal; And described at least one independent digital carrier signal is converted into different frequency.

Description of drawings

By following detailed description that provides and accompanying drawing, will more fully understand example embodiment of the present invention, accompanying drawing only provides by way of example, therefore is not the restriction to illustrated embodiments of the invention.

Fig. 1 show according to illustrated embodiments of the invention, to the situation before and after the conversion of the carrier wave in the broadband that takies the total frequency band of 10MHz;

Fig. 2 shows the block diagram of the base station that is suitable for using in illustrated embodiments of the invention;

Fig. 3 shows the flow chart according to the method for the conversion carrier wave of illustrated embodiments of the invention;

Fig. 4 is the block diagram that is suitable for the base station of using in another example embodiment of the present invention;

Fig. 5 shows the flow chart according to the method for another conversion carrier wave of illustrated embodiments of the invention;

Fig. 6 is the block diagram that is suitable for the base station of using in another example embodiment of the present invention;

Fig. 7 shows the flow chart according to the method for another conversion carrier wave of illustrated embodiments of the invention;

Fig. 8 is the block diagram that is suitable for the base station of using in another example embodiment of the present invention;

Fig. 9 shows the carrier wave of the conversion front and back of another example embodiment according to the present invention;

Figure 10 is the block diagram that is suitable for the base station of using in another example embodiment of the present invention;

Figure 11 shows according to the carrier wave before and after the conversion of illustrated embodiments of the invention; And

Figure 12 shows the flow chart according to the method for conversion carrier wave illustrated embodiments of the invention, shown in Fig. 8-11.

Embodiment

Although describe example embodiment of the present invention with reference to code division multiple access (CDMA) network, but those skilled in the art will recognize that, example embodiment of the present invention can be applied to other telecommunication systems (as, tone among WCDMA, GMS, the WiMax (tone) or the like).

Fig. 1-12 shows the method for the translating cellular carriers (carrier wave) according to illustrated embodiments of the invention.Fig. 1 shows before the frequency translation and the 10MHz frequency band with four (4) individual carrier waves after the frequency translation.Each carrier occupancy 1.25MHz bandwidth.Once more, carrier wave can be used for the tone of CDMA, WCDMA, GSM or WiMax system.In addition, describe embodiment with reference to the operation at place, base station, but those skilled in the art will recognize that in implementation, method embodiment is not limited to the base station.

With reference to Fig. 1,2 and 3,1 place in the base station, in step 100, the analog to digital converter that comprises in the receiver of base station (ADC) 10 can be converted to digital signal with the whole bandwidth that comprises four (4) individual carrier waves.Receiver can be the broadband radio receiver.Although there is shown four (4) individual analog carriers, as well known to those skilled in the art, carrier wave can be the individual digit broadband signal.If carrier wave is the individual digit broadband signal, then skips steps 100.

In step 200, digital filter 20 is further handled digital carrier.The numeral of 10MHz bandwidth is changed into four (4) individual numerals (signal) of the 1.25MHz carrier wave of four separation.

In step 300, digital signal is sent to transform engine 30 (for example, frequency changer) then.Transform engine is converted into new frequency with one or more in four (4) the individual digital signals.Transform engine 30 can with the input of receiver specific carriers resident frequency translation be new frequency.The conversion of digital signal is finished in numeric field.

In step 400, the digital signal after digital to analog converter (DAC) 40 sends conversion is to be converted to analog signal.Can send analog signal to radio frequency (RF) processor 50,,, transmit analog baseband signal to end points 60 then in step 500 with further filtering and amplification.As selection, each carrier wave is separated with conversion after, can use independent D/A level to create four (4) individual different analog signals.Select as another kind, can carry out digital processing, to create broadband signal (bandwidth can equal the bandwidth of input, for example 10MHz) the carrier wave after the conversion.Broadband signal can be sent to DAC 40 then.

As above disclosed in illustrated embodiments of the invention, frequency flexibility will allow smoothly to shift between communication frequency, and handle utilization rate that constantly increases and the capacity requirement that may be produced by the utilization rate of increase.In addition, can be used to drive from signal of base station radio output and have the still less output of a plurality of positions of carrier wave with a plurality of frequencies.

Figure 4 and 5 show the method according to another translating cellular carriers of illustrated embodiments of the invention.For the sake of simplicity, can omit with reference to the detailed description of the example embodiment shown in Fig. 2 and 3 similar step.

With reference to Figure 4 and 5, respectively in

step

100 and 200,10 pairs of carrier waves of ADC are changed, and the digital signal after 10 pairs of conversions of digital filter is carried out filtering.In step 250, packetizer 25 can be carried out packetizing to each digital signal in a known way, to create for example four (4) individual data stream of packets.In step 300, send digital packet stream to transform engine 30, to be converted into new frequency.Can send digital packet stream by for example Ethernet.The digital packet stream after DAC 40 sends conversion also is to be converted to analog signal in step 400.Can send analog signal to radio frequency (RF) processor 50,,, transmit analog signal to end points then in step 500 with further filtering and amplification.

Fig. 6 and 7 shows the method according to another translating cellular carriers of illustrated embodiments of the invention.For the sake of simplicity, can omit with reference to the detailed description of the example embodiment shown in Fig. 2-5 similar step.

With reference to Fig. 6 and 7, respectively in

step

100 and 200,10 pairs of carrier waves of ADC are changed, and the digital signal after 20 pairs of conversions of digital filter is carried out filtering.In step 260, packetizer 25 can be carried out packetizing to each digital signal, and cascade unit 27 can further be unified into each packet level single cascade digital stream of packets.Cascade unit 27 can be realized by hardware or software.In step 300, send the cascade digital stream of packets to transform engine 30, to be converted in the new frequency.Send the new cascade digital stream of packets of changing to DAC 40, to be converted to analog signal in step 400.Can send analog signal to radio frequency (RF) processor 50, with further filtering and amplification, then in step 500, to end points 60 transport level gang mould analog signals.

Fig. 8,9 and 12 methods that show according to another translating cellular carriers of illustrated embodiments of the invention.

With reference to Fig. 8,9 and 12, respectively in

step

100 and 200,10 pairs of carrier waves of ADC are changed, and the digital signal after 20 pairs of conversions of digital filter is carried out filtering.In step 250, packetizer 25 can be carried out packetizing to each digital signal.Shown in Fig. 8,9 and 12,, can send each digital packet stream (perhaps alternatively, the group of each grouping or grouping formation) to separation and different transmitter sites in step 270.Can a plurality of positions of single broadband signal feed-in of one or more carrier waves will be had, but wherein, the number of the carrier wave in each single broadband signal is equal to or less than the number of the carrier wave that receives in the input of receiver.As seen, in the example embodiment shown in Fig. 8 and 9, the single broadband signal with a carrier wave can be sent to position A; Another single broadband signal with two carrier waves can be sent to position B; And the another single broadband signal with a carrier wave can be sent to position C.

At each different transmitter site place, in step 300, for example corresponding transform engine 30 can be converted into digital packet in the new frequency.Send the new digital packet of changing to corresponding D AC 40, to be converted to

analog signal.In step

400 and 500, corresponding 50 pairs of analog signals of RF processor are handled respectively, and analog signal is transferred into end points 60.

Figure 10,11 and 12 methods that show according to another translating cellular carriers of illustrated embodiments of the invention.

With reference to Figure 10,11 and 12, respectively in

step

100 and 200,10 pairs of carrier waves of DAC are changed, and the digital signal after 20 pairs of conversions of digital filter is carried out filtering.In step 250, packetizer 25 can be carried out packetizing to each digital signal.In step 270, can transmit each digital packet stream (perhaps alternatively, the group of each grouping or grouping formation) to separation and different transmitter sites.Shown in Figure 10 and 11, can one of a plurality of transmitter sites of single broadband signal feed-in of a carrier wave only will be had.Separate and different transmitter site in each place, transform engine 30 is converted into each digital packet in the new frequency.Although in the input of receiver, the frequency difference of four (4) individual carrier waves is separated and each transform engine 30A-30D at different transmitter site place is converted to each packet signal in the same frequency.Therefore, in step 500, transmit each packet signal at the same frequency place.This example embodiment can be applied to only can insert the situation of the bandwidth of single carrier, but expectation saves local this advantage of multi-carrier-wave wireless technology of using.

Although utilize the cellular carriers have the frequency band of four (4) individual cellular carriers and to take 10MHz bandwidth broadband signal example embodiment of the present invention has been described, but will recognize that the number of cellular carriers and the bandwidth of broadband signal can change without departing from the scope of the invention.

Example embodiment of the present invention provides frequency flexibility.Frequency flexibility will allow to distribute to the management of communication frequency and smoothly shift, and handle utilization rate that constantly increases and the capacity requirement that is produced by the utilization rate that increases.Providing of this frequency flexibility can realize in numeric field by software.In addition, can be used to drive from signal of base station radio output and have still less a plurality of output long distance wireless datelines (head) of carrier wave with a plurality of carrier waves.

Example embodiment of the present invention also will make wireless service provider position its carrier wave, disturb and optimally handle the cellular services amount to manage better.

Example embodiment of the present invention has been described thus, apparent, can change them in many ways.For example,, will recognize that the present invention is applicable to other system, comprise for example WCDMA, GSM, WiMax or the like although described example implementation mode of the present invention with reference to cdma system.This change should not be regarded as a departure from the present invention, and all such modifications should fall within the scope of the present invention.

Claims

1. the method for a conversion carrier wave comprises:

At least one analog carrier signal in the broadband signal is converted at least one digital carrier signal (100), and described at least one analog carrier signal is in the corresponding frequencies place in the broadband signal; And

At least one digital carrier signal is converted into different frequency (300).

2. method according to claim 1 also comprises:

Described at least one digital carrier signal is carried out filtering (200); And

Wherein, shift step (300) is carried out conversion at least one filtered digital carrier signal.

3. method according to claim 1 also comprises:

Carrier signal after at least one conversion is carried out digital processing (50), to create broadband signal.

4. method according to claim 1 also comprises:

Described at least one digital carrier signal is changed back at least one analog carrier signal (400).

5. method according to claim 4, wherein, described at least one digital signal is converted into described at least one analog carrier signal (400) in the D/A level of separating.

6. method according to claim 4 also comprises:

Analog carrier signal after at least one conversion is amplified and filtering (50); And

At least one amplification and filtered signal are sent to end points (500).

7. method according to claim 1, wherein, described at least one carrier wave is the carrier wave in code division multiple access (CDMA) network.

8. method according to claim 1, wherein, described at least one carrier wave is one of following carrier wave: Wideband Code Division Multiple Access (WCDMA) (WCDMA), global system for mobile communications (GSM) and worldwide interoperability for microwave insert the tone in (WiMax) system.

9. method according to claim 1 also comprises:

Each grouping in described at least one digital carrier signal is turned at least one digital packet stream (250).

10. method according to claim 9 also comprises:

Described at least one digital packet stream is carried out cascade (260).