CN101056159B - Method and user device for receiving data in high-speed shared control channel - Google Patents

Abstract

The invention provides a user facility and a method for receiving data in a high-speed shared control channel and comprises that UE ID is adjusted selectively so as to generate a UE ID value which is subsequently added to a data field so as to generate a data masking which is further processed subsequently into a CRC field and transmitted together with a data pulse train so as to provide related functions of CRC. Another replaced embodiment discloses that UE identifies and initializes a CRC generator before the generation of CRC. The UE ID is contained in the CRC without extra signal spending.

Description

Subscriber equipment and the method for data is received in High-Speed Shared Control Channel

The divisional application that the application is the applying date is on November 14th, 2003, application number is the application for a patent for invention of 02809881.1.

Technical field

The present invention relates to wireless communication field.A kind of application of the present invention is down link (downlink) signaling method about the cyclic redundancy check (CRC) (cyclic redundancy check) using the amendment identified for data protection and single/group UE.

Background technology

Wireless communication system has become the link that must have in modern communications capital construction today.Opinion with this, it not only relies on the support of voice communication increasingly, and also relies on the support of data communication.Voice communication has relatively low speed, and is symmetrical in up and downlink bandwidth, and can predicted required amount of bandwidth.

But data communication may cause difficult tired burden in the telecommunication system, especially in wireless telecommunication systems.First, data communication needs high data rate usually.Secondly, the amount of bandwidth needed for application associated with the data can change significantly, from thousands of conspicuous to several megahertz.3rd, may have different thoroughly up from the amount of bandwidth in down direction.Such as, with typical the Internet browser application, the data of minute quantity transmit in the upstream direction, but have the data of huge amount to be downloaded at down direction.These factors may cause great constraint to radio telecommunications system.

Wideband CDMA (WCDMA) standard, Global 3G 3G as leading) (IMT-2000) standard, support up to the data rate of 2Mb/s in indoor/community outdoor environment and contain (switch wide-area coverage) middle data rate supported up to 384Kb/s in exchange extensive region, and supporting High Rate Packet Data and two-forty circuit switched data.But, for meeting the further requirement of packet data service, need in this data rate, have substantial increase, particularly at down link.Permission WCDMA is supported that the down link peak data rate of about 8-10Mb/s is to obtain the packet data service of optimum efficiency by high-speed downlink packet access (HSDPA).This speed is far above the 2Mb/s demand of IMT-2000.Also the capacity of grouped data is strengthened in the capacity of low delay and improvement.

A kind of method of supported data communication is to each subscriber equipment (UE) assigned with dedicated channel.But this causes the inefficiency to heavens used bandwidth, because this kind of channel remains quite long-standing idle usually.

The another kind of method of replacing the dedicated channel being used for each UE is the use of high speed shared data channel and packet.In the method, multiple high speed data channels is shared between multiple UE.The UE of these data had for transmitting or receive is dynamically allocated one in shared data channel.This causes the use of more efficient frequency spectrum.

Figure 1A-Fig. 1 C represents a kind of flow process of assigning high speed shared data channel when base station has and waits for and be transferred to the data of particular UE.With reference to Figure 1A, relevant downlink dedicated physical channels (DPCH) is transferred to each UE.This UE monitors relevant down link DPCH and shared control channel (SCCH-HS).When not having the data from base-station transmission to UE, UE enters standby mode, and " revive " from then on periodically (wake up) is to attempt to monitor its relevant down link DPCH and SCCH-HS.This allows this UE to save flow process and battery supply.

If the data in base station have been ready to be transferred to UE, high-speed downlink shared channel (HS-DSCH) designator (HI) has been transmitted in relevant DPCH.HI has N bit length, one in the 2n of its instruction shown in a Figure 1B SCCH-HS.Such as, the HI of 2 can indicate 4 SCCH-HS, and namely 00,01,10 or 11.

Such as Figure 1A is shownschematically routine, and when indicating the 3rd channel in Figure 1B, HI is (1,0).When UE accesses the control channel identified by HI, specific SCCH-HS will guide this UE to suitable HS-DSCH, and it has been configured the UE giving these reception data.As shown in Figure 1 C, such as, UE is adjusted to the HS-DSCH (001) identified by SCCH-HS (1,0).The data that this UE is received as it subsequently and sends on HS-DSCH (001).It should be noted, the icon of Figure 1A-Fig. 1 C has represented the explanation of the flow process of assigning HS-DSCH, and the structure of channel and use may be slightly different with the actual design in HSDPA standard.

As the efficient method of the common data channels that the flow process shown in reference to Figure 1A-Fig. 1 C provides assignment data to transmit.Transmit because grouped data is expected to be one or more particular UE, UE mark (ID) is the important parameter from base station transmit signals to UE.

There is a lot of prior art for sending the method for UE ID between base station and UE.With reference to Fig. 2 A, UE ID is attached to the data for transmitting by the first method.Such combination is fed to cyclic redundancy check (CRC) (CRC) generator, and it exports CRC.The packet produced finally transmitted comprises X bit data field, M position UE ID and N position CRC, as shown in Figure 2 B.Although this provides enough signals of both CRC and UE ID to send, it sends bandwidth to signal is waste.

UE ID is attached on the data field that is input in CRC generator by another prior art being shown in Fig. 3 A.CRC generator exports CRC.As shown in Figure 3 B, the data pulse string of this transmission comprises X bit data field and N position crc field.Although this also enough sends UE ID and the CRC between base station and UE, the method is undesirable, identifies because it can be solely single UE and uses.When there being one group of UE to need to be identified, the method also causes the complexity of UE.

Summary of the invention

The present invention discloses some implementation methods sent for the down link signal that data are correlated with.These execution modes disclose and adjust UE ID selectively to produce UE ID value, and it is added to data field to produce data mask by mould 2 subsequently.This data mask can be further processed subsequently as crc field.Then crc field is transmitted the function providing CRC relevant together to data pulse string (burst).Another replacement execution mode discloses and utilized UE to identify initialization CRC generator before CRC produces.Contain UE ID in this CRC of lying in, and do not need extra signaling consumption.

The invention provides a kind of equipment for receiving N bit field and downlink control messages in a user device, this equipment comprises: for receiving the device of described N bit field and downlink control messages, and wherein said N bit field adds by N bit cyclic redundancy and the device identification of N bit User being carried out mould 2 and generates; For determining described customer equipment identification and the whether correct device of described cyclic redundancy check (CRC); For described downlink control messages being transmitted to when described customer equipment identification and described cyclic redundancy check (CRC) are correct the device of media access control layer.

The present invention also provides a kind of method for receiving N bit field and downlink control messages in a user device, the method comprises: receive described N bit field and downlink control messages, and wherein said N bit field adds by N bit cyclic redundancy and the device identification of N bit User being carried out mould 2 and generates; Determine described customer equipment identification and described cyclic redundancy check (CRC) whether correct; And when described customer equipment identification and described cyclic redundancy check (CRC) are correct, described downlink control messages is transmitted to media access control layer.

accompanying drawing explanation

Figure 1A-Fig. 1 C represents the method for the prior art for assigning shared data channel, and wherein Figure 1A illustrates relevant downlink channel, and Figure 1B illustrates multiple control channel, and Fig. 1 C illustrates multiple data channel;

Fig. 1 D is the block diagram of UMTS network framework;

Fig. 2 A is prior art customer equipment identification (UE ID) particular cycle redundancy check (CRC) method;

Fig. 2 B illustrates the data pulse string comprising data field, UE id field and crc field transmitted;

Fig. 3 A is the second prior art customer equipment identification (UE ID) particular cycle redundancy check (CRC) method;

Fig. 3 B illustrates the data pulse string comprising data field and crc field transmitted;

Fig. 4 A is the first execution mode of the present invention, utilizes the exclusive-OR between UE ID and CRC to produce shielding;

Fig. 4 B is the data pulse string transmitted by the system of Fig. 4 A, comprises data field and mask field;

Fig. 5 A is second embodiment of the invention, comprises and utilizes the initialized CRC generator of UE ID;

Fig. 5 B is the data pulse string transmitted by the execution mode of Fig. 5 A, comprises data field and crc field;

Fig. 6 A is third embodiment of the invention, and data field mould 2 is added to UE id field, and afterbody is filled 0, to produce shielding;

Fig. 6 B is four embodiment of the invention, and data field mould 2 is added to UE id field, and front portion is filled 0, to produce shielding;

Fig. 6 C is the data pulse string transmitted by the execution mode of Fig. 6 A and Fig. 6 B, comprises data field and crc field;

Fig. 7 A is fifth embodiment of the invention, and data field mould 2 is added to UE id field, and UE id field is repeated and fills the UE ID of brachymemma in tail bit;

Fig. 7 B is the mode that the present invention the 6th implements, and data field mould 2 is added to UE id field, and UE id field is repeated and fills the UE ID of brachymemma in front;

Fig. 7 C is the data pulse string transmitted by the execution mode of Fig. 7 A and Fig. 7 B, comprises data field and crc field;

Fig. 8 is the list of entirety, subset, secondary subset and indivedual ID;

Fig. 9 is the flow chart according to Message Processing of the present invention.

Embodiment

The preferred embodiment of the present invention is described with reference to the accompanying drawings, and wherein identical label represents identical assembly all the time.

With reference to Fig. 1 D, Universal Mobile Telecommunications System used in the present invention (UMTS) network architecture comprises core network (CN), UMTS Terrestrial Radio Access Network network (UTRAN), and subscriber equipment (UE).Two general-purpose interfaces are Iu interface between UTRAN and core network and the radio interface Uu between UTRAN and UE.UTRAN is made up of multiple radio network sub-system (RNS).Multiple RNS can be interconnected by Iur interface.This is interconnected the stand-alone program allowing core network between different RNS.This RNS is divided into radio network controller (RNC) and some base stations (Node-B) further.Node-B is connected to RNC by Iub interface.A Node-B can serve one or more community, and usually serves multiple UE.UTRAN supports both fdd mode on radio interface and tdd mode.For two patterns, use the identical network architecture and identical agreement.Physical layer and air interface Uu is only had to be separated especially.

With reference to Fig. 4 A, show one embodiment of the present invention.In this embodiment, system 100 use from the transmission data (hereinafter referred to as " data ") of data field 102, CRC generator 104 (it is initialized to 0), from the CRC produced the crc field 106 that CRC generator 104 exports, UE ID from UE id field 108, modulo 2 adder 110 and shielding 112.It is to be understood that in this execution mode and all execution modes, the figure place of each field is marked in field thinks illustration.But this specific figure place is the use of example and and is not used to limit the present invention.

System 100 receives described data field 102 and the data from data field 102 is input in CRC generator 104.CRC generator 104 produces crc field 106 and the CRC from crc field 106 is outputted to the first input of modulo 2 adder 110.UE ID from UE id field 108 is output to the second input of modulo 2 adder 110.CRC and UE ID subsequently by exclusive-OR to produce shielding 112.

Preferably, the figure place (M position) of UE id field 108 is identical with the figure place (N position) of crc field 106.If M=N, then UE ID directly can be added to CRC by mould 2, as shown in Figure 4 A.But, if M and N is unequal, then need an intermediate steps to make it equal.If M < is N, then UE ID is filled 0 of anterior 0 or afterbody so that identical with the length of CRC." the UE ID be filled " CRC 106 should be added to by N mould 2.If M > is N, then minimum effective M-N position will be clipped from UE ID.CRC is added to by mould 2 subsequently by the UE ID of brachymemma.

With reference to Fig. 4 B, the shielding 112 generated is affixed to data field 102 for transmission.

With reference to Fig. 5 A, display second embodiment of the invention.In this embodiment, system 200 use from the data of data field 202, CRC generator 204, from the UE ID of UE id field 208 and the crc field 212 that produces.This system 200 receives data field 202 and the data from data field 202 is outputted in CRC generator 204.This CRC generator 204 is identical type with the CRC generator 104 of Fig. 4 A, except CRC generator 204 utilizes the UE ID initialization from UE ID 208.Initialization is represented by the dotted line in Fig. 5 A.As those of ordinary skill in the art are known, it is all 0 that CRC generator is generally initialized to, as the example of the CRC generator 104 shown in Fig. 4 A.Therefore, CRC generator 204 based on from data field 202 input data and utilize CRC generator 204 initialization of UE ID and generate CRC.Do not need nodulo-2 addition in this embodiment.

Preferably, from the figure place (M position) of the UE ID of UE id field 208 and the equal and opposite in direction of CRC generator 204, although this and nonessential.If the size of UE ID (M position) is less than the size of CRC generator 204, then UE ID can be filled above 0 or below 0 so that the equal and opposite in direction of its length and CRC generator 204." the UE ID be filled " should can be used to initialization CRC generator 204 subsequently.Alternatively, the value in UE id field 208 can be loaded with initialization CRC generator 204, and any will be 0 by the position, position that UE ID inserts.If the size of UE ID (M position) is greater than the size of CRC generator 204, then least significant bit will be clipped from UE ID to make UE ID meet CRC generator 204.Initialization CRC generator 204 is used to subsequently by the UE ID of brachymemma.

With reference to Fig. 5 B, the crc field 212 of generation is added to data field 202 for transmission.

Use second execution mode of the present invention of implicit expression UE ID to present simplification, and stable, do not need with the combination of SCCH-HS and UE ID because of it and disassemble, at transmitter and receiver, needed for the specific CRC method of UE of prior art and the first execution mode.

With reference to Fig. 6 A, show the 3rd execution mode of the present invention.In this embodiment, system 300 uses the data from data field 302, the UE ID from UE id field 308A, modulo 2 adder 310 and shielding 311, CRC generator 304 and the crc field 312 that produces.System 300 receives data field 302 and the data from data field 302 is input to the first input of modulo 2 adder 310.Therefore, from data field 302 data with from the UE ID of UE id field 308A by exclusive-OR to produce shielding 311.Shielding 311 is imported in the CRC generator 304 generating crc field 312.

In this embodiment, the figure place (M position) of UE id field 308A must be identical to perform nodulo-2 addition with the figure place of data field 302 (X position).If M and X is equal, the value from UE id field 308A directly can add to the data from data field 302 with mould 2.But, if M and X is unequal, then need intermediate steps to make it equal.If M is less than X, then UE ID is filled X-M mantissa 0, and the value therefore from UE id field 308A equals data field 302 in length." the UE ID value be filled " is as shown in Figure 6A added to the data from data field 302 by mould 2 subsequently.

Due to the length X of data field 302, do not wish that M will be greater than X.But if this situation occurs, then minimum effective M-X position is clipped from the value UE id field 308A.This is added to the data from data field 302 by mould 2 subsequently by the UE ID of brachymemma.

With reference to Fig. 6 B, county shows the 4th execution mode of the present invention.In this embodiment, the function mode of system 301 is identical with the 3rd execution mode of Fig. 6 A.Difference preferably is only the production method of the value from UE id field 308B.In this embodiment, UE ID to be filled before X-M 0, and the length therefore from the UE ID of UE id field 308B equals data field 302.This " the UE ID value be filled ", as shown in Figure 6B, is added to the data from data field 302 by mould 2 subsequently.It should be noted, before this filling can comprise selectively and afterbody 0 in conjunction with (not shown), to make UE ID length equal with data field.

With reference to Fig. 6 C, from the crc field 312 that the system 300 of the execution mode shown in Fig. 6 A generates, or the CRC 314 generated by the system 301 of the execution mode shown in Fig. 6 B is affixed to the data field 302 of transmission.Therefore, crc field 312 or 314 can be used and is additional to data field 302.

With reference to Fig. 7 A, display fifth embodiment of the invention.In this embodiment, system 400 uses the data from data field 402, the UE ID from UE id field 408A, modulo 2 adder 410 and shielding 411, CRC generator 404 and the crc field 412 that produces.System 400 receives data field 402 and the data from data field 402 is input to the first input of modulo 2 adder 410.UE ID from UE id field 408A is output to the second input of modulo 2 adder 410.Data from data field 402 and the UE ID from UE id field 408A by exclusive-OR to produce shielding 411.This shielding 411 is imported into CRC generator 404, and it produces crc field 412.

In this embodiment, the figure place (M position) of UE id field 408A must be identical with the figure place of data field 402 to perform nodulo-2 addition.If M and X is equal, the data that the UE ID from UE id field 408A will be added to by direct mould 2 from data field 402.Due to the length of data field 402, do not wish that M will be greater than X.But if this situation occurs, then least significant bit is clipped until the length of UE ID equals X from UE id field 408A.This is added to the value from data field 402 with mould 2 subsequently by the UE ID of brachymemma.

If the length of UE ID is less than data field 402, then " the UE ID of compound " is produced, and the value therefore from UE id field 408 equals X.The UE ID of compound passes through to repeat UE ID many times until be applicable to X bit field and produced, subsequently to be inserted remaining tail bit by the UE ID of brachymemma.This is indicated among the UE id field 408A of Fig. 7 A.The UE ID of this compound is added to the data from data field 402 with mould 2 subsequently.

With reference to Fig. 7 B, show the 6th execution mode of the present invention.The function mode of the system 401 of this execution mode is identical with the 5th execution mode of Fig. 7 A.The difference of this execution mode is only the value from UE id field 408B.Although the UE ID of compound is produced in the mode of same Fig. 7 A, be coupled with as front by the UE ID of brachymemma part, contrary with the tail bit in the UE id field 408A shown in Fig. 7 A.It should be noted, combination that is anterior and afterbody brachymemma position can be comprised, to make the length of UE ID identical with data field 402 by the UE ID " filling " of brachymemma.

With reference to Fig. 7 C, the crc field 414 that the crc field 412 produced from the system 400 of the 5th execution mode of Fig. 7 A or the system 401 from the 6th execution mode of Fig. 7 B produce is affixed to data field 402 for transmission.Therefore, the type of one of crc field 412,414 will be used and will be attached on data field 402.

It should be noted, all above-mentioned execution modes can be used to support multiple mark (ID).UE may need with different stage processing messages address: 1) the single ID of UE, 2) ID of corresponding subset or one group of UE, wherein UE belongs to this subset; Or 3) broadcast (all ID) of all UE in correspondence system.Such as, as shown in Figure 8, UE ID 12 is highlighted and indicates to indicate it to receive at 4 different stages and to process ID:1) UE-specific ID (#12); 2) secondary subset C ID; 3) subset 2ID; And 4) all ID.It should be noted, the group identification A-E replaced also can be produced, and therefore the UE of different group can be included.Such as, group B will comprise all UE be expressed close to group B, and it comprises No. UE 2,7,12,17,22 and 27.Therefore, any group or subgroup are produced, desired by user by specifically identifying indivedual UE.

For supporting this demand, transmitter generates CRC as described in each execution mode.At receiver, this message of UE process also produces the CRC expected, does not need the amendment based on ID.Received CRC mould 2 is added to calculated CRC by UE processor subsequently.The output produced is the ID transmitted, and it can be any one above-mentioned ID.If this ID is not the one in these ID, then this UE abandons transmission.According to the present invention, use the CRC code of length N, the non-metrical error possibility on the SCCH-HS of mark is close to 2-n.Use 24 CRC to protect the data transmitted on the hs-dsch; use 16 CRC to protect the control information transmitted on SCCH-HS; and suppose that the false acceptance rate of the HI position of non-predetermined UE is 10-3, accept providing following mistake according to aforesaid embodiments of the present invention:

P _fa=P _fahI × P _fah × P _sDformula (1)

Wherein P _fafor the possibility that mistake accepts; P _fahI is the possibility that the mistake of HI accepts; P _fah is the possibility that the mistake of SCCH-HS accepts; And P _sDfor HS-DSCH (P _sD) successful detection possibility.

(1) uses the ident value of above-mentioned present embodiment with the formula:

P _fa＝10 ^-3×2 ^-16×2 ^-24＝9.1×10 ^-16

This reliability calculating is pointed out, for the CRC of equal length, user transmits the possibility of misdata to higher level by extreme reduction.

With reference to Fig. 9, this flow chart illustrates the method according to the downlinlc message between process Node-B and UE of the present invention.The method provides general introduction roughly should not be interpreted as the description of the understanding of all detailed medium education (MAC) layers and the physical layer signaling needed for processing messages (i.e. packet).First Node-B produces the downlink control messages (step 1) in MAC layer, subsequently this message and UE ID is forwarded to physical layer (step 2).This physical layer produces CRC and applies UE ID for forwarding messages (step 3) is data pulse string.This message is transferred into UE (step 4) from Node-B subsequently.In this physical layer, UE ID and CRC is verified to determine their whether correct (steps 5).If so, message is forwarded to MAC layer (step 6), and MAC layer processes this message (step 7) subsequently further.

It should be noted, the step 6 of Fig. 9 comprises the extra between physical layer and MAC layer, and it comprises the effective control message of instruction CRC/UE ID.But this is optional step.In a preferred embodiment, effective message is only had will to be forwarded to MAC layer from physical layer.Therefore, in a preferred embodiment, the message of any MAC of being forwarded to of hypothesis is effective by MAC layer.In the execution mode that another is replaced, extra CRC/UE ID useful signal forwards being treated as extra confirmation with this message.

The present invention has the treatment step of UE ID and CRC eliminating separation.When two fields as previously mentioned as combined, this UE will not process any message further, until both CRC and UE ID (or ID of other type shown in Fig. 8) are all correctly.

Although the present invention is described according to preferred implementation, other amendment in the scope of the present invention specified by claims will be apparent to those skilled in the art.

Claims (8)

1., for receiving an equipment for N bit field and downlink control messages in a user device, this equipment comprises:

For receiving the device of described N bit field and downlink control messages, wherein said N bit field adds by N bit cyclic redundancy and the device identification of N bit User being carried out mould 2 and generates;

For determining described customer equipment identification and the whether correct device of described cyclic redundancy check (CRC);

For described downlink control messages being transmitted to when described customer equipment identification and described cyclic redundancy check (CRC) are correct the device of media access control layer.

2. equipment according to claim 1, wherein said N bit field is 16 bit fields.

3. equipment according to claim 1, wherein said N bit field and downlink control messages are with broadband CDMA frequency divided duplex reception of beacons.

4. equipment according to claim 1, wherein said N bit field and downlink control messages receive with Wideband Code Division Multiple Access (WCDMA) time division duplex format.

5., for receiving a method for N bit field and downlink control messages in a user device, the method comprises:

Receive described N bit field and downlink control messages, wherein said N bit field adds by N bit cyclic redundancy and the device identification of N bit User being carried out mould 2 and generates;

Determine described customer equipment identification and described cyclic redundancy check (CRC) whether correct; And

When described customer equipment identification and described cyclic redundancy check (CRC) are correct, described downlink control messages is transmitted to media access control layer.

6. method according to claim 5, wherein said N bit field is 16 bit fields.

7. method according to claim 5, wherein said N bit field and downlink control messages are with broadband CDMA frequency divided duplex reception of beacons.

8. method according to claim 5, wherein said N bit field and downlink control messages receive with Wideband Code Division Multiple Access (WCDMA) time division duplex format.