AU2012203588B2 - Method and system for implicit user equipment identification - Google Patents

Abstract

A user equipment (UE) including: circuitry configured to receive a wireless signal of a high speed shared control channel, wherein the wireless signal of the high speed shared control channel includes an N bit field and information indicating at least one high speed downlink shared channel, the N bit field including an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity; circuitry configured to determine whether the CRC is correct; and circuitry configured to process a wireless signal of the at least one high speed downlink shared channel associated with wireless signal of the high speed shared control channel when criteria is met, wherein the criteria includes the CRC being correct. X BITS M BITS N BITS DATA GENERATOR X BITS M BITS N BITS DATA UE ID K&gg FIG. 2B X BITS M BITS N BITS -|> GENERATOR X BITS N BITS DATA!!ggFIG. 3B3 X BITS N BITS N BITS CRC DATA GENERATOR MASK 102 104 106 110 112 X BITS N BITS DATA MASK FIG. 4B 102 L 1 2 -

Description

PCol Section 29 Regulaton 3.2(9) AUSTRALIA Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Application Number: Lodged: Invention Title: Method and system for implicit user equipment identification. The following statement is a full description of this invention, including the best method of performing it known to us: P1 11AAU/0710 [00011 MElTHOD AND SYSTEM FOR 3MPLICIT USER EQUhIPMEfNT DTNTFICAIjON [0002] BACKGROUND [0003] The present invention relates to the field of wireless communications. One of the application of the present invention is directed to a downlink signaling approach employing amodified cyclic redundancy check for both data protection and unique/group ,E identification, [0004] Wireless communication systems have become an integral link in today's modern telecommunications infrastcrature. As such, they have become increasingly relied upon not only to support voice comiunications, but also data communications. Voice communications are relatively low-rate, symmetrical in the upstream and downstream bandwidths and are predictable in the amount of bandwidth required, [0005] However, data communications can place severe burdens upon a telecommunication system, particularly a wireless teleconnnuunication system, First, data communications can often require extremely high data rates. Second, the amount of bandwidth for a data related application can vary greatly from several kilohertz of bandwidth:to several megahertz. Third, the amount of bandwidth in the upstream and downstream directions can be drastically different. For example, with a typical internet browsing application, very little data is sent iu the upstream direction while vast amounts of data are downloaded in the downstream direction. Th ese factors can place severe constraints upon a wireless teleconmunication system. [0006] The Wideband CDMA (WCDMA) standard, as the leading global third generation (3G) (IMT-2000) standard, supports data rates up to 2 Mb/s in indoor/small-cell-outdoor environments and up to 3 84 kb/switch wide-area coverage, as well as support for both high-rate packet data and high-rate circuit-switched data. However to satisfy the future demands for packet-data services, there is a need for a substantial increase in this data rate, especially in the downlink. High speed downhnk packet access (HSDPA) would allow WCDMAtu support downlinkpeakc data rates in the range of approximately 8-10 MbOs for best-effort packet-data services. This -1rate is far beyond the IMT-2000 requirement of 2 Mb/s, It also enhances the packet data capability in terimsof lower delay and improved capacity. [0007 One solution for supporting data communications is the allocation of dedicated channels to each user equipment (UE). However, this results in an extremely ineffiient ude of the bandwidth since such channels often remain idle for long durations. [0008] An altentive to dedicated channels for each IE is the use of the high speed shared data channels and the packeting of data. In this method, a plurality of high speed data channels are shed between a plurality of UEs, Those UEs having data for transmission or reception are dynamically assigned one of the shared data channels. This results in a much more efficient use of the spectrum. [0009] One such;process for assigning abhigh speed shared data channel when a base station has data waiting for transmission to aparticular TE is shown in Figs, 1A 1C. Referring to Fig. 1A, an associated downlink dedicated physical channel (DPCH) is transmitted to each UBE, The UE monitors associated downlink DPCR as well as the shared control chautnels (SCCH-HS). When there is no data being transinitted to the UE from the base station, the UE enters a standby mode whereby it periodically "wakes up" to attempt to monitor its associated downlinlk DPCH as well as SCCH ISs. This pennits the UE to save processing and battery resources. [00010] If data at the base station is ready for transmission to the UE, a High Speed Downlink Shared Channel (HS-DSCH) idicator (I) is transmitted in the associated DPCH. The I-IT has n-bit length, , which points to one of 2" SCCI-HSs shown in Fig. 1. For example a 2 bit I can point to 4 SCCI-r-ISs, i.e., 00, 01, 10 or 11. [00011] For the example shown in Fig. 1A, the IHI is (1, 0) which points to the third channel shown in Fig. 1B. When the U)B accesses the control channel identified by the HI, that particular SCCH-HS will direct the UBE to the proper HS-DS CH, which has been allocated to the UE for reception of the data. As shown in Fig. 1C, for example, the U2E tanes to HS-DSCH (001) that was identified by SCC1-HS (1, 0). -2- 3 The UE then receives the data intended for it over the HS-DSCH (001). It should be noted that the graphical representation of Fig. 1A-1C has been presented to illustrate the process of assigning HS-DSCHs, and the configuration and use of channels may differ slightly from actual implementation in HSDPA standards. 5 [00012]The process as described with reference to Figs. 1A-1C provides an efficient method for assigning common data channels for transmission of data. Since packet data is intended for one or more, specific UEs, the UE identity (ID) is a critical parameter for signaling from the base station to the UE. [00013] There are several prior art methods for signaling the UE ID between the 0 base station and the UE. Referring to Fig. 2A, the first method appends the UE ID onto the data for transmission. The combination is fed to a cyclic redundancy check (CRC) generator, which outputs a CRC. The resulting data packet, which is ultimately transmitted, includes an X-bit data field, an M-bit UE ID and an N-bit CRC as shown in Fig. 2B. Although this provides adequate signaling of both the 5 CRC and the UE ID, it is wasteful of signaling bandwidth. [00014] Another prior art technique shown in Fig. 3A appends the UE ID onto the data field for input into the CRC generator. The CRC generator outputs a CRC. As shown in Fig. 3B, the data burst for transmission includes an X-bit data field and an N-bit CRC field. Although this also adequately signals the UE ID and the :0 CRC between the base station and the UE, it is undesirable since it can only be used for unique UE identification. This method also causes increase complexity of UE when a group UEs need to be identified. [00014a] Reference to any prior art in the specification is not an acknowledgment or suggestion that this prior art forms part of the common general knowledge in 25 any jurisdiction or that this prior art could reasonably be expected to be understood, regarded as relevant, and/or combined with other pieces of prior art by a skilled person in the art.

3a [00015] SUMMARY [00016] The present invention discloses several implementations for data related downlink signaling. The embodiments disclose selectively tailoring the UE ID to create a 5 UE ID value, which is then modulo 2 added to a data field to create a data mask. This data mask may be further processed as the CRC field. The CRC field is then transmitted with the data burst to provide CRC-related functions. An alternative 4 embodiment discloses initializing a CRC generator with UE identification prior to CRC generation. This implicitly includes the UL ID within the CRC without requiring additional overhead signaling. According to one aspect of the present invention provides a wide-band 5 code division multiple access (WCDMA) user equipment (UE) including: circuitry configured to receive a first wireless signal of a control channel associated with WCDMA high speed downlink packet access, wherein the first wireless signal of the control channel includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a 10 positive integer; and circuitry configured to not process a second wireless signal of the WCDMA high speed downlink packet access on a condition that the CRC is not correct; and circuitry configured to use the control information to process a second 15 wireless signal associated with WCDMA high speed downlink packet access on a condition that at least one criterion is met, wherein the at least one criterion includes the CRC being correct and the circuitry is configured to not use the control information to process the second wireless signal on the condition that the at least one criterion is not met. 20 According to another aspect the present invention provides a method for use in a wide-band code division multiple access (WCDMA) user equipment (UE), the method including: receiving a first wireless signal of a control channel associated with WCDMA high speed downlink packet access, wherein the first wireless 25 signal includes an N bit field and control information and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two combined with an N bit UE identity, wherein the value of N is a positive integer and the UE identity refers specifically to the UE; determining whether the CRC is correct; using the control 30 information to process a second wireless signal associated with WCDMA high speed downlink packet access on a condition that at least one criterion is met, the at least one criterion including the CRC being correct; 4a and not using the control information to process the second wireless signal on the condition that the at least one criterion is not met. According to another aspect the present invention provides a user equipment (UE) comprising: 5 circuitry configured to receive a wireless signal of a control channel, wherein the wireless signal includes an N bit field and control information, and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer; circuitry configured to determine whether criteria are met, wherein the 10 criteria include the CRC is correct and the UE identity is any one of a plurality of UE identities associated with the UE; and circuitry configured to use the control information to process a downlink shared channel on a condition that the criteria are met. In accordance with a further aspect the present invention provide a method 15 implemented in a user equipment (UE) device comprising: the UE device receiving a wireless signal of a control channel, wherein the wireless signal includes an N bit field and control information, and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UL identity, wherein the value of N is a positive integer; 20 the UE device determining whether criteria are met, wherein the criteria includes the CRC is correct and the UE identity is any one of a plurality of UE identities associated with the UE device; and the ULE device using the control information to process a downlink shared channel on a condition that the criteria are met. 25 In accordance with another aspect present invention provides a wide-band code division multiple access (WCDMA) user equipment (UF) including: circuitry configured to receive a first wireless signal of a control channel associated with WCDMA high speed downlink packet access, wherein the first wireless signal of the control channel includes an N bit cyclic redundancy check 4b (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer; and circuitry configured to not process a second wireless signal of the WCDMA high speed downlink packet access on a condition that the CRC is not correct. 5 In accordance with still further aspect the present invention provides a method for use in a wide-band code division multiple access (WCDMA) user equipment (UE), the method including: receiving a first wireless signal of a control channel associated with WCDMA high speed downlink packet access, wherein the first wireless signal of the control 0 channel includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer; and circuitry configured to not process a second wireless signal of the WCDMA high speed downlink packet access on a condition that the CRC is not correct. According to another aspect there is provided a wide-band code division 5 multiple access (WCDMA) user equipment (UE) including: circuitry configured to receive a first wireless signal of a control channel associated with WCDMA high speed downlink packet access, wherein the first wireless signal includes an N bit field and control information, the N bit field including an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer and the UE 20 identity refers specifically to the UE; circuitry configured to determine whether the CRC is correct; and circuitry configured to use the control information to process a second wireless signal associated with WCDMA high speed downlink packet access on a condition that at least one criterion is met, wherein the at least one criterion includes the CRC being correct and the circuitry is configured to not use the control information to 25 process the second wireless signal on the condition that the at least one criterion is not met. According to another aspect there is provided a wide-band code division multiple access (WCDMA) user equipment (UE) including: circuitry configured to receive a first wireless signal of a control channel associated with WCDMA high speed downlink 30 packet access, wherein the first wireless signal includes an N bit cyclic redundancy 4c check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer and the UE identity refers specifically to the UE; and circuitry configured to not use control information included in the first wireless signal to process a second wireless signal associated with WCDMA high speed downlink packet access on a 5 condition that the CRC is not correct. According to another aspect there is provided a method for use in a wide-band code division multiple access (WCDMA) user equipment (UE), the method including: receiving a first wireless signal of a control channel associated with WCDMA high speed downlink packet access, wherein the first wireless signal of the control channel includes 0 an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer and the UE identity refers specifically to the UE; and not using control information included in the first wireless signal to process a second wireless signal associated with WCDMA high speed downlink packet access on a condition that the CRC is not correct. 5 According to another aspect there is provided a wide-band code division multiple access (WCDMA) user equipment (UE) including: circuitry configured to receive a first wireless signal of a first channel associated with WCDMA high speed packet access, wherein the first wireless signal includes an N bit field and control information and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two added 0 to an N bit UE identity, wherein the value of N is a positive integer and the first channel is a control channel; circuitry configured to determine whether the CRC is correct; circuitry configured to use the control information to process a second channel associated with WCDMA high speed packet access on a condition that at least one criterion is met, wherein the at least one criterion includes the CRC being correct; and 25 wherein the circuitry is configured to not use the control information to process the second channel on the condition that the at least one criterion is not met. According to another aspect there is provided a method for use in a wide-band code division multiple access (WCDMA) user equipment (UE), the method including: receiving a first wireless signal of a first channel associated with a WCDMA high speed 30 packet access, wherein the first wireless signal includes an N bit field and control information and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two combined with an N bit UE identity, wherein the value of N is a positive integer and 4d the first channel is a control channel; determining whether the CRC is correct; using the control information to process a second channel associated with WCDMA high speed packet access on a condition that at least one criterion is met, the at least one criterion including the CRC being correct; and not using the control information to processing the 5 second channel on the condition that the at least one criterion is not met. According to another aspect there is provided a user equipment (UE) including: circuitry configured to receive a first wireless signal of a first channel, wherein the first wireless signal includes an N bit field and control information and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, O wherein the value of N is a positive integer and the first channel is a control channel; circuitry configured to determine whether the CRC is correct; circuitry configured to use the control information to process a second channel on a condition that at least one criterion is met, wherein the at least one criterion includes the CRC being correct; and wherein the circuitry is configured to not use the control information to process the 5 second channel on the condition that the at least one criterion is not met. According to another aspect there is provided a method for use in a user equipment (UE), the method including: receiving a first wireless signal of a first channel, wherein the first wireless signal includes an N bit field and control information and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two combined with an 0 N bit UE identity, wherein the value of N is a positive integer and the first channel is a control channel; determining whether the CRC is correct; using the control information to process a second channel on a condition that at least one criterion is met, the at least one criterion including the CRC being correct; and not using the control information to process the second channel on the condition that the at least one criterion is not met. 25 As used herein, except where the context requires otherwise, the term "comprise" and variations of the term, such as "comprising", "comprises" and "comprised", are not intended to exclude further additives, components, integers or steps.

4e BRIEF DESCRIPTION OF THE DRAWING(S) Figs. 1A-1C represent a prior art method for assigning shared data channels, where Fig. 1A illustrates. the associated downlink channel, Fig. 1B illustrates a plurality of control channels and Fig. 1C illustrates a plurality of data channels. 5 Fig. 1 D is a block diagram of the universal mobile telecommunication system network architecture.

[00029] Fig. 613 is: a fourth embo diment ofthe present invention which modulo 2 adds the data field to a UE ID field padded with leading zeros to create a mask [00030] Fig. 6C is the data burst trnsmitted bythe embodiments of Fig. GA and 6B including a data fiefd and a CRC feld. [00031] Fig. 7 A it a fifth embodiment of the present invention which module 2 adds the data field to at UE ID field repeated and padded a truncated UB ID in the trailing bits. [00032] Fig. 7B is a sixth embodiment of the present invention which modulo 2 adds the data field to a UE D) field repeated and padded a truncated UE ID in the loading bits. [00033] Fig. 7C is the data burst transintted by the embodiments of Fig. 7A and 7B including a data field and a CRC field. [00034] Fig. 8 is a tabulation of global, subset, subsubset and unique IDS. [00035] Fig. 9 is a flow diagram of the processing of a message in accordance with the present invention. [00036] DETAILEDDESCRIPTION OFTHIE PREFERRED BMBODIMENT(S) [00037] The presentlypreferred embodiments are described below with reference to the drawing figures wherein like numorals represent like elements throughout. [00038] Referring to Fig. ID, a Universal Mobile Teleonnunications System (UMTS) network archioteture used by the present invention includes a core network (CN), a UMTS Terrestial Radio Access Network (UTRAN) and a User Equipment (UE). The two general interfaces are the In interface, between the UTRAN and the core network, as well as the radio interface Uu, between the UTRAN and the U. The TTRAN consists of several Radio Network Subsystems (RN'S). They can be interoonnected by thei Iur interface. This interconnection allows core network independent procedures between different RNSs. The RNS is further divided into the Radio Network ControUer (RNC) and several base stations (Node-B). Tho Node-Bs are connected to the RNC by the Iub interface. One Node-B can serve one or multiple -5cells, and typically serves a plurality of UEs. The UTRAN supports both FDD mode and TDD mode on the radio interface. For both mo des, the samte network architecture and the same protocols are used. Only the physical layer and the air interface Un are specified separately. [00039] Referring!to Fig, 4A, one embodiment of the present invention is sbown. In this embodiment, ie system 100 utilizes the data for tranaission (hereinafter referred to as "data") from the data field 102, a CRC generator 104 (which has been initialized to zero), the tesultiag CRC from the CRC field 106 output from the CRC generator 104, the UE I from the UE ID field 108, a modulo 2 adder 110 and azmaski 112. It should be noted that in this embodiment and all of the emtbodiments described hereinafter, the number of bits of each field is noted above the field as an example. However, the specific number of bits is exemplary and should not be construed to lHit the present invention. [00040] The system 100 receives the data field 102 and inputs the data from the data field 102 into the CRC generator 104. The CRC generator 104 generates the CRC field 106 and outputs tho CRC from the CRC field 106 to a first input of the noduIo 2 adder 110. The UlE ID from the UE ID field 108 is output to the second input to the modulo 2 adder 110, The CRC and UE ID are then module 2 added to create a mask 112 [000413 , Preferably, the number of bits of theUE ID field 108 (M bits) is the same as the number of bits of the CRC field 106 (N bits). If M=N, then the UE ID may be directly nodulo 2 added to the CRC as shown in Fig. 4A. However, if M and N are not equal, then ana interim step is necessary to make them equal. If M<N, then the UE ID is padded with either leading zeros or trailing zeros to be equal in length to the CRC. This "padded UE ID"isNnodulo 2 added to the CRC 106. If M>N, then the least significant M-N bits are truncated from the UE ID . The truncated UEID is then module 2 added to the CRC. [:00042] Refering to Fig. 4B, the mask 112 that is generated is appended to the data field 102 for transmission, -6- [00043] Referring to Fig. 5A, a second embodiment of the present invention is shown, In this embodimfjent, the system 200 utilizes the data from the data field 202, a CRC generator 204, thd UE ID from the UlE ID field 208, and the resulting CRC field 212. The system 200 receives the data field 202 and outputs the data from data field 202 into the CRC generator 204, The CRC generator 204 is the same type of generator as the CRC generator 104 from Fig. 4A, except that the CRC generator 204 is initialized with the UE ID from the UE 1) field 208. This initialization is illustrated by the Jotted line in Fig. 5A. As is well known by those of sidll in the art, a CRC generator is typically initialized to all zeros, as was the case with the CRC generator 104 shown in Fig. 4A Accordingly, the CRC generator 204 generates a CRC based upon the input data from the data field 202 and the initialization of the CRC generator 204 with UB ID. No modulo 2 addition is required in this embodiment. [0004.4] Preferably, the number of bits of the UE ID from the UE ID field 208 (M bits) is the same as the size of the CRC generator 204, although this is not necessary. If the size of the UE ID (M-bits) is loss than the size of the CRC generator 204, then the UB ID iay be padded with either leading zeros or trailing zeros to be equal in length to the size of the CRC generator 204. This "padded UE ID" may then be used to initialize the CRC generator 204, Alternatively, the value in the UB TD field 208 maybe loaded to initialize the CRC generator 204, and anybit positions not filled by the UB) wotld be zero. If the size of the UE ID (M bits) is greater than the size of the CRC generator 204, then the least significant bits are truncated from the TE ID in order to fit the UE ID to CRC generator 204. The tunoated UE ID is then used to initialize the CRC generator 204. [00045] Referring to Fig. 5B, the CRC field 212 that is generated is appended to the data field 202 for ti-ansmission. [00046] This second embodiment of the present invention utilizing implicit UE ID presents a simplistic, yet robust, alternative since it does not require assembly and disassenibly of the UE ID with the SCCH-HS, at the transmitter or the receiver, as required by UE-specific CRC methods of the prior art and the first embodiment -7- [00047] Refenring to Fig. 6A, a third embodiment of the present invention is shown. In this embodiment, the system 300 utilizes the data from the data field 302, the UE ID from the UED field 308A, a modulo 2 adder 310 and a mask 311, a CRC generator 304 and the resulting CRC field 312. The system 300 receives the data field 302 and inputs the data fromn the data field 302 ito a first input of the modulo 2 adder 310. The UE ID Tom E ID field 308A is output to the second input to the muodulo 2 adder 310. Accordingly, the data from the data field 302 and the UE ID from the UE I) field 308A are module 2 added to create a mask 311. The mask 311 is input into the CRC generator 304 which generates a CRC field 312, [00048] In this embodiment, the number of bits of the UE ID field 308A (N bits) must be the same as the number of bits (X bits) of the data field 302 in.order to perform the modulo 2 addition. If M and X are equal, then the value from the UB IDF field 308A may be directly module 2 added to the data'from the data field 302 However, if M and X are not equal, then an interim step is necessary to make them equal. If M is less thai X, then the UE ID is padded with either X-M trailing zeros such that the value from the UE ID field 308A is equal in length to the data field 302, This "padded UE ID value" as shown in Fig. 6A is then module 2 added to the data from the data field 302. [00049] Due to the length X of the data field 302, it is not expected that M will be greater than X. However, if this were to occu, then the least significant M-X bits are truncated from the value in IE ID field 308A. The truncated UE ID is then module 2 added to the data from the data field 302. [00050] Refering to Fig. 6B, a fourth embodiment of the present invention is shown. In this embodiment, the system 301 operates in the exact same manner as the third embodiment shown in Fig. 6A. The only difference in this embodiment is the method in which the, value from the UE ID field 308B is generated. In this embodiment, the UE ID isipadded with X-M leading zeros such that the LIE ID from the UE ID field 308B is equal in length to the data fiold 302. This "padded UE 1D value", as shown in Fig. 6, is then module 2 added to the data from the data field -8- 302. It should be noted that the padding may alternatively comprise a combination of leading and trailing zerds (not shown) in order to make the TE ID the same length as the data field. [00051] Referring to Fig. 6C, the CRC field 312 that is generated from the system 300 of the third embodiment shown in Fig. 6A, or the CRC 314 that is generated from the system 301 of the fourth embodiment shown in Fig. 6B, is appended to the data fidld 302 for transmission. Accordingly, either type of CRC field 312, 314 may be used and appended onto the data field 302. [00052] Referring to Fig. 7A, a fifth enmbodinent of the present invention is shown. In this embodiment, the system 400 utilizes the data from the data field 402, the UTE ID from the UE ID field 408A, a modulo 2 adder 410, a mask 411, a CRC generator 404 and the resulting CRC field 412. The system 400 receives the data field 402 and inputs the dataefromthe data field 302 into a first input of the module 2 adder 410. The UE ID fromtUE ID field 408A is output to the second input to the mod-o 2 adder 410. The data from the data field 402 and the UE6 ID from the 'UE ID field 408A are module 2 added to create a mask 411. The mask 411 is input into the CRC generator 404, which generates the CRC field 412. [00053] In this embodiment, the nmnber of bits of the UE ID field 408A (M bits) must be the same as the number of bits of the data field 402 in order to perform the module 2 addition. If the M is equal to X, then the UE ID from the UB ID field 408A maybe directly module 2 added to the data fRom the data field 402. Due to the length of the data field 302, itis not expected that Mwill be greater than X. However, if this were to ocrir, then the least significant bits are ftuncated from the UE ID field 408A until the length of the UE ID field is equal to X. The tumncated TE ID is then module 2 added to the value from the data field 402. [00054] If the length of the UP ID is shorter than the data field 402, then a "composite IE ID" is created such that the value from the UE ID field 408A is equal to X. The composite VE ID is created by repeating the UE ID as many times as it will fit within an X-bit field, then filling in the remaining trailing bits with a trmncated UE -9- ID. This is ropresentecdin the UE ID field 408A in Fig. 7A The composite TE ID is then modulo 2 added td the data from the data field 402. [00055] Referring to Fig. 7B, a sixth embodiment of the present invention is shown. The system 401' of this cnbodiment operates in the same manner as the fifth embodiment shown in Fig. 7A. The only difference in this eubodinent is the value from the UE ID field 408B. Although the composite UE ID created in the same manner as in Fig. 7A, the truncated UB ID portion is added as leading bits, as opposed to the trailing pts in the UE ID field 408A shown in Fig. 7A, It should be noted that the truncated UTE ID "padding" may include a combination of leading and trailing truncated bits in order to make the UB ID the same length as the data field 402. [00056] Referring to Fig. 7C, the CRC field 412 that is generated from either the system 400 of the fifth embodiment shown in Fig. 7A, or the CRC field 414 that is generated from the system 401 ofthe sixth embodiment shown in Fig. 7B, is appended to the data field 402 for transmission. Accordingly, either type of CRC field 412, 414 may be used and appended onto the data field 402. [00057] It shouldibe noted that all of the above-described embodiments can be used to support multiple identities (IDs). A UE may be required to process messages addressed at several levels; 1)the UE's unique 1D, 2) an ID corresponding to a subset or group of Is, where the TE belongs to the subset; or 3) a broadcast (global ID) coresponding to all LEs in the system. For example, as shown in Fig. 8, UE ID 12 has been highlighted to indicate that it will able to receive and process M~s at four different levels: 1) the UE-specific ID (#12); 2) subsubset C ID; 3) subset 2 U.; and 4) global ID. It should also be notod that alternate group identifications A-E, may also be created such that a different group of TEs maybe included. For example, group B will include all of the UEs identified next to group B which inohlde UE numbers 2, 7, 12,17,22 and 27. Additionally, any group or subgroup maybe created by specifically identifying individual UEs as desired by a user. -10- [00058] To support this requirement, the tansnitter generates the CRC as described above with each of the embodiments. At the receiver, the UE processes die message and generates The expected CRC, without the ID-based modification. 'Ihe UE processor then module 2 adds the received CRC to the calculated CRC. The resultant output is the hansmitted ID, which can be any one of the IDs described above. Ifthe ID is none of these, then the UE discards the transmission. [00059] In accordance with the present invention, using the CRC code of the lengthN, the undetectel error probability on the identified SCCH-HS approaches 2-. Using a 24--bit CRC to protect data transmitted on HS-DSCH, a 16-bit CRC to protect control infonnation transmitted on SCCH-HS, and assuming 10' false acceptance probability for Il bits by an unintended 'UB, the emb odinents in accordance with the present invention hereinbefore described will provide the probability of the false acceptances as follows: Pt = PFH x PH x PsD Equation(1) where Pa is the probability of a false acceptance; PjH is the probability of a false acceptance of HI; PnH is the probability of a false acceptance of SCCH-HS; and PeS is the probability of a successful detection of HS-DSCH (Psn). [00060] Using the above identified values for thepresent example with Equation (1): [00061] P, =10-' x 2- x 2 4 9.1 x 104 [00062] The reliability computation indicates that for the same length CRC, the probability of a user passing erroneous data up to a higher layer, will be extremely low. [00063] Referring to Fig. 9, the flow diagram illustrates a netod fbrprocessing downlink messages bbtween a node B and a UE in accordance with the present invention. This method provides a general overview and should not be interpreted as a comprehensive description of all of the detailed mediuma access control (MAC) layer and physical layer signaling required for processing a message, (i.e., a data p acket). The node B first generates a downliuk control message in tie MAC layer (step 1) and -11then forwards the message and the UE 1D to the physical layur (step 2). The physical layer generates [he CRC and applies the UB ID for forwarding with the message (step 3) as a data burst. The nicssage is then t-ansmitted from the node B to the 5UE (step 4). At the physical layer, the UE ID and the CRC are checked to detennine if they are correct (step 5). If so, the message is forwarded to the MAC layer (step 6) which then further processes the message (step 7). [00064] It should ;be noted that Step 6 in Fig. 9 includes an additional signal between the physical layer and the MAC layer, which comprises a control message that indicates the CRCaU ID is valid. However, this is an optional step. In the preferred embodiment, dnly valid messages will be forwarded from the physical layer to the MAC layer. Accordingly, in the preferred eTbodimat, the MAC layer will assume that any m essage that is forwarded to the MAC is vah- In the alternative embodiment, the additional CRC/UE ID valid signaling will be forwarded along with the message as an additional confmation. [00065] The present invention has the advantage of eliminating separate processing steps for the UE ID and the CRC. Wheu the two fields are combined as hereinbefore described, the UE will not ifther process any message until both the CRC and the UE ID (or other type of ID shown in Fig. 8) are correct, [000661 While th6 present invention has been described in terms ofthe preferred embodiment, other variations, which are within the scope of the invention, as outlined in the claims below will be apparent to those skilled in the art. -12-

Claims (47)

1. A wide-band code division multiple access (WCDMA) user equipment (UE) including: 5 circuitry configured to receive a first wireless signal of a control channel associated with WCDMA high speed downlink packet access, wherein the first wireless signal includes an N bit field and control information, the N bit field including an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer and the UE identity refers specifically to the UE; 0 circuitry configured to determine whether the CRC is correct; and circuitry configured to use the control information to process a second wireless signal associated with WCDMA high speed downlink packet access on a condition that at least one criterion is met, wherein the at least one criterion includes the CRC being correct and the circuitry is configured to not use the control information to process the second 5 wireless signal on the condition that the at least one criterion is not met.

2. The UE of claim 1 further including circuitry configured to monitor a plurality of control channels associated with the WCDMA high speed downlink packet access. 20

3. The UE of claim 1 wherein the second wireless signal includes packet data.

4. A method for use in a wide-band code division multiple access (WCDMA) user equipment (UE), the method including: receiving a first wireless signal of a control channel associated with 25 WCDMA high speed downlink packet access, wherein the first wireless signal includes an N bit field and control information and the N bit field includes an N 14 bit cyclic redundancy check (CRC) modulo two combined with an N bit UE identity, wherein the value of N is a positive integer and the UE identity refers specifically to the UE; determining whether the CRC is correct; 5 using the control information to process a second wireless signal associated with WCDMA high speed downlink packet access on a condition that at least one criterion is met, the at least one criterion including the CRC being correct; and not using the control information to process the second wireless signal 0 on the condition that the at least one criterion is not met.

5. The method of claim 4 further including monitoring a plurality of control channels associated with the WCDMA high speed downlink packet access. 5

6. The method of claim 4 wherein the second wireless signal includes packet data.

7. A wide-band code division multiple access (WCDMA) user equipment (UE) including: circuitry configured to receive a first wireless signal of a control channel 20 associated with WCDMA high speed downlink packet access, wherein the first wireless signal includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer and the UE identity refers specifically to the UE; and circuitry configured to not use control information included in the first 25 wireless signal to process a second wireless signal associated with WCDMA high speed downlink packet access on a condition that the CRC is not correct. 15

8. The UE of claim 7 further including circuitry configured to process the second wireless signal on a condition that criteria is met, wherein the criteria includes the CRC being correct and the UE identity being correct. 5

9. The UE of claim 1 or 7 wherein the circuitry configured to receive the first wireless signal is further configured to intermittently monitor the control channel.

10. The UE of claim 1 or 7 wherein the control information indicates at least one 0 physical high speed downlink shared channel to process.

11. The UE of claim 1 or 7 further including circuitry configured to receive a third wireless signal of a downlink dedicated physical channel (DPCH). 5

12. A method for use in a wide-band code division multiple access (WCDMA) user equipment (UE), the method including: receiving a first wireless signal of a control channel associated with WCDMA high speed downlink packet access, wherein the first wireless signal of the control channel includes an N bit cyclic redundancy check (CRC) modulo 20 two added to an N bit UE identity, wherein the value of N is a positive integer and the UE identity refers specifically to the UE; and not using control information included in the first wireless signal to process a second wireless signal associated with WCDMA high speed downlink packet access on a condition that the CRC is not correct. 25 16

13. The method of claim 12 further including processing the second wireless signal on a condition that criteria is met, wherein the criteria includes the CRC being correct and the UE identity being correct. 5

14. The method of claim 4 or 12 further including intermittently monitoring the control channel.

15. The method of claim 4 or 12 wherein the control information indicates at least one physical high speed downlink channel to process. 0

16. The method of claim 4 or 12 further including receiving a third wireless signal of a downlink dedicated physical channel (DPCH).

17. A wide-band code division multiple access (WCDMA) user equipment (UE) 5 including: circuitry configured to receive a first wireless signal of a first channel associated with WCDMA high speed packet access, wherein the first wireless signal includes an N bit field and control information and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE 20 identity, wherein the value of N is a positive integer and the first channel is a control channel; circuitry configured to determine whether the CRC is correct; circuitry configured to use the control information to process a second channel associated with WCDMA high speed packet access on a condition that 25 at least one criterion is met, wherein the at least one criterion includes the CRC being correct; and 17 wherein the circuitry is configured to not use the control information to process the second channel on the condition that the at least one criterion is not met. 5

18. The UE of claim 1, 7, or 17 wherein the first wireless signal is received in a wideband code division multiple access frequency division duplex format.

19. The UE of claim 17 wherein the first wireless signal is received in a wideband code division multiple access time division duplex format. 0

20. The UE of claim 17 wherein the UE identity refers specifically to the UE.

21. A method for use in a wide-band code division multiple access (WCDMA) user equipment (UE), the method including: 5 receiving a first wireless signal of a first channel associated with a WCDMA high speed packet access, wherein the first wireless signal includes an N bit field and control information and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two combined with an N bit UE identity, wherein the value of N is a positive integer and the first channel is a control 20 channel; determining whether the CRC is correct; using the control information to process a second channel associated with WCDMA high speed packet access on a condition that at least one criterion is met, the at least one criterion including the CRC being correct; and 25 not using the control information to processing the second channel on the condition that the at least one criterion is not met. 18

22. The method of claim 4, 12, or 21 wherein the first wireless signal is received in a wideband code division multiple access frequency division duplex format. 5

23. The method of claim 21 wherein the first wireless signal is received in a wideband code division multiple access time division duplex format.

24. The method of claim 21 wherein the UE identity refers specifically to the UE. 0

25. A user equipment (UE) including: circuitry configured to receive a first wireless signal of a first channel, wherein the first wireless signal includes an N bit field and control information and the N bit field includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer and 5 the first channel is a control channel; circuitry configured to determine whether the CRC is correct; circuitry configured to use the control information to process a second channel on a condition that at least one criterion is met, wherein the at least one criterion includes the CRC being correct; and 20 wherein the circuitry is configured to not use the control information to process the second channel on the condition that the at least one criterion is not met.

26. The UE of claim 25 further including circuitry configured to monitor a plurality of 25 control channels. 19

27. The UE of claim 17 or 25 wherein the second channel includes circuit switched data. 5

28. The UE of claim 17 or 25 wherein the second channel includes packet data.

29. The UE of claim 25 wherein the UE identify refers specifically to the UE.

30. The UE of claim 17 or 25 wherein the circuitry configured to receive the first 0 wireless signal is further configured to intermittently monitor the first channel.

31. A method for use in a user equipment (UE), the method including: receiving a first wireless signal of a first channel, wherein the first wireless signal includes an N bit field and control information and the N bit field 5 includes an N bit cyclic redundancy check (CRC) modulo two combined with an N bit UE identity, wherein the value of N is a positive integer and the first channel is a control channel; determining whether the CRC is correct; using the control information to process a second channel on a 20 condition that at least one criterion is met, the at least one criterion including the CRC being correct; and not using the control information to process the second channel on the condition that the at least one criterion is not met. 20

32. The method of claim 21 or 31 wherein the second channel includes circuit switched data.

33. The method of claim 21 or 31 wherein the second channel includes packet data. 5

34. The method of claim 21 or 31 further including increasing a use of battery resources when the UE wakes up.

35. The method of claim 31 wherein the UE identify refers specifically to the UE. 0

36. The method of claim 21 or 31 further including intermittently monitoring the first channel.

37. A wide-band code division multiple access (WCDMA) user equipment (UE) 5 including: circuitry configured to receive a first wireless signal of a control channel associated with WCDMA high speed downlink packet access, wherein the first wireless signal of the control channel includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a 20 positive integer; and circuitry configured to not process a second wireless signal of the WCDMA high speed downlink packet access on a condition that the CRC is not correct. 21

38. The UE of claim 37 further including circuitry configured to process the second wireless signal of the WCDMA high speed downlink packet access when criteria is met, wherein the criteria includes the CRC being correct and the UE identity being correct. 5

39. The UE of claim 1, 7, 17, 25, or 37 wherein a value of N is 16.

40. The UE of claim 37 wherein the first wireless signal of the control channel associated with the WCDMA high speed downlink packet access is received in a wideband code division multiple access frequency division duplex format. 0

41. The UE of claim 37 wherein the first wireless signal of the control channel associated with the WCDMA high speed downlink packet access is received in a wideband code division multiple access time division duplex format. 5

42. The UE of claim 17, 25, or 37 further including a battery.

43. A method for use in a wide-band code division multiple access (WCDMA) user equipment (UE), the method including: receiving a first wireless signal of a control channel associated with 20 WCDMA high speed downlink packet access, wherein the first wireless signal of the control channel includes an N bit cyclic redundancy check (CRC) modulo two added to an N bit UE identity, wherein the value of N is a positive integer; and circuitry configured to not process a second wireless signal of the 25 WCDMA high speed downlink packet access on a condition that the CRC is not correct. 22

44. The method of claim 43 further including circuitry configured to process the second wireless signal of the WCDMA high speed downlink packet access on a condition that criteria is met, wherein the criteria includes the CRC being correct and the 5 UE identity being correct.

45. The method of claim 4, 12, 21, 31 or 43 wherein a value of N is 16.

46. The method of claim 43 wherein the first wireless signal of the control channel 0 associated with the WCDMA high speed downlink packet access is received in a wideband code division multiple access frequency division duplex format.

47. The method of claim 43 further including using battery resources to process the second wireless signal of the WCDMA high speed downlink packet access.