RU2461132C2 - Reporting of ack and cqi information in wireless communication system - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: user equipment (UE) may be able to receive data from up to two cells with dual-cell operation. The UE may determine channel quality indicator (CQI) information for a first cell, determine CQI information for a second cell, and send the CQI information for both cells on a feedback channel with a single channelisation code. The UE may process a control channel from each cell and, if control information is received from the cell, may further process a data channel from the cell to receive data sent to the UE. The UE may determine acknowledgement (ACK) information for each cell based on processing results for the data and control channels from that cell. The UE may send the ACK information for both cells on the feedback channel with the single channelisation code.

EFFECT: efficient ACK and CQI information reporting.

47 cl, 17 dwg, 6 tbl

Description

This application claims priority for the following provisional patent applications:

No. 61/039413, entitled “METHOD AND APPARATUS FOR DUAL-CELL WIRELESS COMMUNICATIONS” (filed March 2, 2008);

No. 61/049993, entitled “METHOD AND APPARATUS FOR DUAL-CELL WIRELESS COMMUNICATIONS”, filed May 2, 2008;

under No. 61/058771, entitled “METHOD AND APPARATUS FOR DUAL-CELL WIRELESS COMMUNICATIONS” (filed on June 4, 2008;

No. 61/087021, entitled “DYNAMIC DOWNLINK CARRIER SWITCHING IN DUAL CELL-HSDPA USING A SINGLE HS-DPCCH ON THE UPLINK” filed August 7, 2008;

No. 61/087589 entitled “DYNAMIC DOWNLINK CARRIER SWITCHING IN DC-HSDPA USING A SINGLE HS-DPCCH ON THE UL” August 8, 2008;

No. 61/088480 entitled "DYNAMIC DOWNLINK CARRIER SWITCHING IN DUAL CELL-HSDPA USING A SINGLE HS-DPCCH ON THE UPLINK" filed August 13, 2008;

under No. 61/091120, entitled “DYNAMIC DOWNLINK CARRIER SWITCHING IN DUAL CELL-HSDPA USING A SINGLE HS-DPCCH ON THE UPLINK” filed August 22, 2008; and

No. 61/097682, entitled “SINGLE CODE HS-DPCCH DESIGN FOR DC-HSDPA” (“EXECUTING A SINGLE-CODE FOR DC-HSDPA”), filed September 17, 2008.

All of the foregoing preliminary applications for the grant of US patents are transferred to the assignee of this document and are incorporated into the materials of this application by reference.

Technical field

The present disclosure generally relates to communication, and more specifically to methods for reporting feedback information in a wireless communication system.

State of the art

Wireless communication systems are widely used to provide various communication services, such as voice, video, packet data, messaging, broadcasting, etc. These communication systems may be multiple access systems capable of supporting multiple users by sharing available system resources. Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal division FDMA systems (OFDMA), and single carrier FDMA systems (SC-FDMA).

A wireless communication system may include a number of Node Bs that can communicate for a number of user equipment (UEs). The Node B may transmit data to the UE. The UE may send channel quality indication information (CQI) indicating downlink channel quality to the Node B. The Node B may select a transport format based on the CQI information and may transmit data in accordance with the selected transport format to the UE. The UE may send acknowledgment information (ACK) for data received from the Node B. The Node B may determine whether to retransmit data or transmit new data to the UE based on the ACK information. It is advisable to send ACK and CQI information efficiently in order to achieve good functioning.

SUMMARY OF THE INVENTION

The materials of this application describe methods for reporting a report of ACK and CQI information in a wireless communication system. The UE may be able to receive data from up to two cells in dual cell operation. The UE may send ACK and CQI information for two hundred in various ways.

In an aspect, ACK and CQI information for two cells may be sent on a feedback channel with a single channelization code. In one design, the UE may determine CQI information for the first cell, determine CQI information for the second cell, and send CQI information for both cells via a single channelization code feedback channel. The UE may process the control channel from each cell and, if control information is received from the cell, may further process the data channel from the cell to receive data sent to the UE. The UE may determine ACK information for each cell based on processing results for data and control channels from such a cell. The UE may send ACK information for both cells on a feedback channel with a single channelization code.

The UE may also receive data from more than two cells, from multiple carriers, from multiple communication lines, etc. The UE may send ACK and CQI information for a plurality of cells, a plurality of carriers, or a plurality of communication links in a manner similar to the design described above. The UE may also send ACK and CQI information in other ways, as described below. Various aspects and features of the disclosure are also described in more detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows a wireless communication system.

2 and 3 show data transmission from two cells with feedback information sent by the UE with one and two channelization codes, respectively.

Figs. 4A to 6B show various designs for sending CQI information.

7 shows a data processing unit for sending ACK and CQI information.

8 shows the operation of the UE in dynamic switching mode.

9 shows a flowchart for sending feedback information.

10 shows a flowchart for receiving feedback information.

11 shows another sequence of operations for sending feedback information.

12 shows a flowchart for sending CQI information.

13 shows a process for operating a UE.

14 shows a block diagram of a UE and a Node B.

DETAILED DESCRIPTION

The methods described herein can be used for various wireless communication systems such as CDMA (code division multiple access), TDMA (time division multiple access), FDMA (frequency division multiple access), OFDMA (Orthogonal Frequency Division Multiple Access), SC-FDMA (Single Carrier FDMA) and other systems. The terms “system” and “network” are often used interchangeably. A CDMA system may implement radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Broadband CDMA (W-CDMA) and other CDMA options. cdma2000 covers the IS-2000, IS-95 and IS-856 standards. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA system can implement radio technology such as Enhanced UTRA (E-UTRA), Ultra Mobile Broadcast (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc. .d. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). The Long Term Development Project (LTE) and the advanced LTE-advanced (LTE-A) 3GPP are new releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). cdma2000 and UMB are described in documents from an organization called “3rd Generation Partnership Project 2” (3GPP2). The methods described herein may be used for the radio communication systems and technologies mentioned above, as well as other radio communication systems and technologies. For clarity, some aspects of the technologies are described below for WCDMA, and 3GPP terminology is used in much of the description below.

1 shows a wireless communication system 100, which may include a number of Nodes B and other network entities. For simplicity, only one Node B 120 and one radio network controller (RNC) 130 are shown in FIG. The Node B may be a station that communicates with the UE and may also be referred to as an evolved Node B (eNB), base station, access point, etc. Node B may provide communications coverage for a specific geographic area. To improve the capacity of the system, the full coverage area of Node B can be divided into many (for example, three) smaller zones. Each smaller area may be served by a respective Node B. subsystem. In 3GPP, the term “cell” may refer to the smallest coverage area of Node B and / or the Node B subsystem serving this coverage area, depending on the context in which the term is used. In 3GPP2, the term “sector” or “cell sector” may refer to the smallest coverage area of a base station and / or the base station subsystem serving this coverage area. For clarity, the 3GPP cell concept is used in the description below. RNC 130 can join a set of Nodes B and provides coordination and management for these Nodes B.

UE 110 may be one of many UEs dispersed throughout the system. UE 110 may be fixed or mobile and may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, etc. UE 110 may be a cell phone, personal digital assistant (PDA), wireless modem, wireless device, handheld device, travel computer, cordless cordless telephone, local area communications (WLL), etc. UE 110 may communicate with Node B 120 via a downlink and an uplink. A downlink (or forward link) indicates a link from a Node B 120 to the UE 110, and an uplink (or reverse link) indicates a link from a UE 110 to the Node B 120.

Release 5 and later 3GPPs support High Speed Downlink Packet Access (HSDPA), which is a set of channels and procedures that enable high-speed downlink packet data. With regard to HSDPA, the Node B may send data on a High Speed Downlink Shared Channel (HS-DSCH), which is a downlink transport channel that is shared by the UE both in time and in code. The HS-DSCH may carry data for one or more UEs in each transmission time interval (TTI). The sharing of HS-DSCH can be dynamic and can vary from TTI to TTI.

Table 1 lists the physical downlink and uplink physical channels used for HSDPA and gives a brief description for each physical channel.

Table 1 Communication line Channel Channel Name Description Downlink HS-PDSCH High Speed Physical Downlink Shared Channel Carries data sent over HS-DSCH for different UEs Downlink HS-SCCH Shared Control Channel for HS-DSCH Carries control information for HS-PDSCH Uplink HS-DPCCH Dedicated Physical Control Channel for HS-DSCH Carries feedback information from the UE

3GPP also supports dual-cell HSDPA (DC-HSDPA). For DC-HSDPA, up to two hundred Node Bs can send HS-DSCH data to a UE in this TTI. Two cells can operate on different carriers. Hence, the terms “cells” and “carriers” can be used interchangeably with respect to DC-HSDPA. In general, the technologies described in the materials of this application can be used to transmit data over multiple communication lines, which can correspond to different cells, different carriers, etc.

HSDPA and DC-HSDPA support Hybrid Automatic Repeat reQuest (HARQ). With HARQ, Node B can send a transport block transmission to the UE and can send one or more additional transmissions, if necessary, until the transport block is decoded correctly by the UE by the receiver, or the maximum number of retransmissions has been sent, or some other termination condition. A transport block may also mean a packet, codeword, data block, etc. The UE may send ACK information after each transmission of the transport block to indicate whether the transport block has been decoded correctly or in error. The Node B may determine whether to send another transmission of the transport block or complete the transmission of the transport block based on the ACK information.

UE 110 may send ACK and CQI information for one cell to HSDPA. UE 110 may send ACK and CQI information for two cells in DC-HSDPA. It may be desirable to send ACK and CQI information in an efficient manner for DC-HSDPA.

In an aspect, ACK information for two cells in a DC-HSDPA may be sent on a single channelization code HS-DPCCH. This may be referred to as “single-code HS-DPCCH”, “single HS-DPCCH”, etc. The single-code HS-DPCCH can provide good performance for DC-HSDPA.

Figure 2 shows the performance of data transmission in DC-HSDPA using a single-code HS-DPCCH. The transmission timeline may be divided into units of radio frames, and each radio frame may have a duration of 10 milliseconds (ms). As for HSDPA, each radio frame can be divided into five subframes, each subframe can have a duration of 2 ms and can include three intervals, and each interval can have a duration of 0.667 ms. The TTI may be equal to one subframe for HSDPA and may be the smallest unit of time within which the UE can be scheduled and served.

Node B 120 may support multiple (eg, three) cells. Each cell can transmit HS-SCCH and HS-PDSCH on the downlink to the UEs served by such a cell. Each cell can use up to fifteen channelization codes of 16 chips with a spreading factor of 16 (SF = 16) for the HS-PDSCH. Each cell can also use any number of channelization codes of 128 chips with a spreading factor of 128 (SF = 128) for the HS-SCCH. The channelization codes are variable spreading coefficient (OVSF) orthogonal codes that can be generated in a structured manner based on the OVSF code tree. The number of channelization codes of 16 chips used for the HS-PDSCH, and the number of channelization codes of 128 chips used for the HS-SCCH can be configured for each cell.

Figure 2 shows the HS-SCCH and HS-PDSCH for two cells 1 and 2 and the HS-DPCCH for UE 110. The HS-SCCH may be aligned on the boundary of the radio frame. HS-PDSCH can begin two intervals after the HS-SCCH. The HS-DPCCH may begin at approximately 7.5 intervals from the end of the corresponding transmission on the HS-PDSCH.

Each cell may serve one or more UEs in each TTI. Each cell can send control information for the planned UEs on the HS-SCCH and can send data for the planned UEs on the HS-PDSCH two slots later. Control information may also be called scheduling information, downlink signaling, etc. The control information may identify the scheduled UEs and the transport format selected for each scheduled UE. The transport format may indicate a modulation scheme, a transport block size, and a set of channelization codes for transmitting data to the UE. The HS-PDSCH can carry one transport block for each UE planned without many inputs and many outputs (MIMO), and one or two transport blocks for each UE planned with MIMO.

UE 110 is configured to operate DC-HSDPA and can receive data from up to two cells in a TTI. In each TTI, the UE 110 may process the HS-SCCH from cells 1 and 2 to determine whether control information has been sent to the UE. For each cell from which HS-SCCH control information was received, UE 110 may process the HS-PDSCH from such a cell to recover a transport block sent to UE 110. UE 110 may determine ACK information for transport blocks, if any taken from two hundred. The ACK information may contain an ACK or a negative acknowledgment (NACK) for each transport block, wherein, the ACK indicates that the transport block has been decoded correctly, and the NACK indicates that the transport block has been decoded in error. UE 110 may also estimate the ratio of signal level to cumulative interference and noise (SINR) for each cell and may determine CQI information based on SINR estimates for both cells. UE 110 may send feedback information containing ACK and CQI information on the HS-DPCCH at approximately 7.5 slots from the end of the respective transmissions on the HS-PDSCH. The ACK information may be sent in one slot, and the CQI information may be sent in the next two slots, as shown in FIG.

The ACK information for a given TTI may be represented by one of L possible values, where L> 1. In one design, L possible ACK values may be associated with L different codewords in the codebook. One codeword corresponding to the value of the ACK information may be sent on the HS-DPCCH to transmit ACK information.

In the first codebook execution, a codebook of eight codewords can be used for ACK information for two cells in DC-HSDPA. Each codeword can contain ten code bits that can be processed and sent on the HS-DPCCH in one slot, as described below. Each code bit can have a binary value of '1' or '-1' (or, alternatively, a value of either of two '1' or '0', depending on the chosen notation).

Table 2 shows an exemplary eight codeword codebook for ACK information for two cells in DC-HSDPA. Eight codewords are given in the last eight rows of table 2. The first two columns of table 2 provide the ACK information content for each codeword. The next ten columns give ten code bits w ₀ through w ₉ for each code word. As shown in Table 2, the first two codewords can be used to send an ACK or NACK for the transport block received from cell 1 and discontinuous transmission (DTX) for cell 2. DTX may occur due to (i) cell 2 not scheduling UE 110 for data transmission, or (ii) cell 2, scheduling UE 110 for data transmission, but UE 110 decoding HS-SCCH from cell 2 with an error, and thus missing HS-PDSCH. The following four codewords can be used to send an ACK or NACK for a transport block from each of cells 1 and 2. The last two codewords can be used to send an ACK or NACK for a transport block received from cell 2, and DTX for cell 1.

Table 2 - Code Book for ACK Information for DC-HSDPA

DC-HSDPA Code bits Mimo Honeycomb 1 Honeycomb 2 w ₀ w ₁ w ₂ w ₃ w ₄ w ₅ w ₆ w ₇ w ₈ w ₉ Trance-
tailor unit 1 Trance-
tailor unit 2 ACK Dtx -one -one -one -one -one -one -one -one -one -one ACK Dtx Nack Dtx one one one one one one one one one one Nack Dtx ACK ACK -one one -one one -one -one -one -one one -one ACK ACK ACK Nack -one -one one -one one -one one -one -one -one ACK Nack Nack ACK one -one -one -one -one one -one one -one -one Nack ACK Nack Nack -one one one -one one one -one one one one Nack Nack Dtx ACK one one -one one one -one one one -one one Pre Dtx Nack one -one one one -one one one -one one one Post

The first codebook execution for DC-HSDPA shown in Table 2 reuses the codebook used for MIMO. This may simplify the implementation of UE 110 and Node B 120. UE 110 may be configured to operate DC-HSDPA or MIMO. The codewords sent by UE 110 for ACK information may be interpreted differently depending on whether the UE is configured for DC-HSDPA or MIMO. In particular, codewords can be interpreted (i) as shown by the first two columns of table 2 when UE 110 is configured for DC-HSDPA, or (ii) as shown by the last two columns of table 2 when UE 110 is configured for MIMO. In Table 2, “PRE” denotes a codeword that can be sent as a preamble for the HS-DPCCH, and “POST” denotes a codeword that can be sent as the final part for the HS-DPCCH.

In a second codebook execution, a codebook of ten codewords can be used for ACK information for DC-HSDPA. Each codeword may contain ten code bits, and each code bit may have a binary value, any of '1' or '-1'.

Table 3 shows an exemplary ten-codeword codebook for ACK information for two cells in DC-HSDPA. The first two codewords can be used to send ACK or NACK for the transport block received from cell 1, and DTX for cell 2. The next four codewords can be used to send ACK or NACK for the transport block from each of cells 1 and 2. The next two codewords can be used to send ACK or NACK for the transport block received from cell 2, and DTX for cell 1. The last two codewords can be used for PRE and POST.

Table 3 - Another Code Book for ACK Information for DC-HSDPA DC-HSDPA Code bits Mimo Honeycomb 1 Honeycomb 2 w ₀ w ₁ w ₂ w ₃ w ₄ w ₅ w ₆ w ₇ w ₈ w ₉ Trans-port unit 1 Trans-port unit 2 ACK Dtx -one -one -one -one -one -one -one -one -one -one ACK Dtx Nack Dtx one one one one one one one one one one Nack Dtx ACK ACK -one one -one one -one one -one -one one -one ACK ACK ACK Nack -one -one one -one one -one one -one -one -one ACK Nack Nack ACK one -one -one -one -one one -one one -one -one Nack ACK Nack Nack -one one one -one one one -one one one one Nack Nack Dtx ACK one -one -one -one one -one -one -one one one - Dtx Nack -one -one one one -one -one -one one -one one - Pre one one -one one one -one one one -one one Pre Post one -one one one -one one one -one one one Post

The codebook execution for DC-HSDPA in Table 3 reuses eight codewords in the MIMO codebook and further includes two additional codewords for the case in which a transport block is received from cell 2 and DTX is obtained for cell 1. This may simplify implementation UE 110 and Node B 120.

Tables 2 and 3 show the executions of two example codebooks for ACK information for two cells in DC-HSDPA. In general, a codebook with any number of codewords can be used for ACK information for DC-HSDPA. The number of codewords may be dependent on the number of possible values for ACK information. Each codeword may contain any suitable bit sequence / vector. Some or all of the codewords for DC-HSDPA can be taken from the codebook for MIMO, as described above, which can simplify the implementation of the UE and Node B. Alternatively, the codewords for DC-HSDPA can be determined independently of the codewords for MIMO, for in order to achieve good performance, for example, to maximize the distance between codewords for DC-HSDPA. Different codebooks can thus be used for DC-HSDPA and MIMO. In yet another design, ACK information for two cells in a DC-HSDPA may be sent on different HS-DPCCH branches with a single channelization code. ACK information for each cell may be generated separately, for example, based on the codebook shown in table 4 below.

ACK information for cell 1 may be sent on a single HS-DPCCH single-channel code (in-phase (I) branch or quadrature (Q) branch). The ACK information for cell 2 may be sent on another HS-DPCCH branch with the same channelization code. The mapping of cells 1 and 2 into two branches and the selection of a suitable channelization code can be such that good detection performance can be achieved by Node B 120. In one design, ACK information for two cells can be sent as follows:

• Send ACK information for cell 1 on branch Q with channelization code Cch, 256.33,

• Send ACK information for cell 2 on branch I with the channelization code Cch, 256.33,

where '256' denotes a spreading factor and '33' denotes an OVSF code number.

The channelization codes Cch, 256.1, Cch, 256.33 and Cch, 256.64 are reserved for the HS-DPCCH. Therefore, the execution described above uses a channelization code that can be assigned to the HS-DPCCH, which in this case can simplify the processing at UE 110 and Node B 120. ACK information for two cells can also be displayed in branches I and Q of HS- DPCCH in other ways and / or sent using other channelization codes.

In yet another aspect, ACK information for two cells in a DC-HSDPA may be sent on an HS-DPCCH with one channelization code for each cell. This may be called “dual-HS-DPCCH,” “dual HS-DPCCH,” etc. The dual-code HS-DPCCH may simplify the operation of the UE 110 and the Node B 120.

Figure 3 shows the performance of data transmission in DC-HSDPA using a two-code HS-DPCCH. UE 110 may be configured to operate DC-HSDPA, and may be assigned a first channelization code C1 for HS-DPCCH for cell 1 and a second channelization code C2 for cell 2. UE 110 may receive data from up to two cells in a TTI. In each TTI, the UE 110 may process the HS-SCCH from cells 1 and 2 to determine whether control information has been sent to the UE. If UE 110 receives control information from cell m, where m ∈ {1, 2}, UE 110 may process HS-PDSCHs from cell m to recover the transport block sent to UE 130, determine ACK information for the transport block, and send ACK information in the HS-DPCCH with the channelization code Cm. The ACK information for each cell may comprise ACK, NACK, or DTX depending on the decoding results for the HS-SCCH and HS-PDSCH from such a cell. UE 110 may also send CQI information for each cell on the HS-DPCCH with a channelization code for the cell. UE 110, therefore, can send ACK and CQI information for each cell independently of a channel forming code HS-DPCCH for the cell. Each cell can detect ACK and CQI information from UE 110 based on the channelization code for the cell.

Table 4 shows an exemplary codebook execution with five codewords for ACK information for one cell. The first two codewords can be used to send an ACK or NACK for a transport block received from a cell. The third codeword may be used to indicate DTX for the cell. The last two codewords can be used for PRE and POST.

Table 4 - Code Book for ACK Information for One Cell in DC-HSDPA ACK Information Code bits w ₀ w ₁ w ₂ w ₃ w ₄ w ₅ w ₆ w ₇ w ₈ w ₉ ACK -one -one -one -one -one -one -one -one -one -one Nack one one one one one one one one one one Dtx 0 0 0 0 0 0 0 0 0 0 Pre one one -one one one -one one one -one one Post one -one one one -one one one -one one one

The codebook execution shown in Table 4 may provide the UE 110 and the cell with the ability to distinguish between NACK and DTX.

A cell may resend the previous transmission of the transport block if a DTX is received from the UE 110, and may send another transmission of the transport block if a NACK is received. This can improve decoding performance on UE 110. In yet another codebook implementation, DTX is not supported, and UE 110 may send NACK if control information is not received on the HS-SCCH, as well as if the transport block is decoded in error. A cell may resend a previous transmission or send another transmission of a transport block if a NACK is received.

In one design, ACK information for two cells may be sent as follows:

• Send ACK information for cell 1 on branch Q with channelization code Cch, 256.64,

• Send ACK information for cell 2 on branch Q with channelization code Cch, 256.1,

The ACK information for two cells may also be sent on HS-DPCCH branches I and / or Q in other ways and / or sent using other channelization codes.

A dual-code HS-DPCCH may be used for DC-HSDPA as described above. The two-code HS-DPCCH can also be used to combine DC-HSDPA and MIMO. In this case, each cell can transmit up to two transport blocks from MIMO to UE 110. UE 110 can generate ACK information for each cell based on the mapping shown in Table 2 or 3, and can send ACK information on an HS-DPCCH with a channelization code for such a honeycomb.

In yet another aspect, ACK information for two cells in a DC-HSDPA may be sent on a single channel forming code HS-DPCCH. In one design, the CQI information for each cell may contain five bits that can transmit one of 31 levels from 0 to 30 CQIs. Ten bits of CQI information for two cells can be encoded using a block code (20, 10) to obtain 20 code bits that can be sent on the HS-DPCCH in two intervals.

Table 5 shows the first execution of the CQI mapping. Ten information bits may be sent on the HS-DPCCH and may be denoted as a ₀ through a ₉ . Five bits of CQI information for cell 1 can be denoted as cqi1 ₀ through cqi1 ₄ and can be mapped to information bits a ₀ through a _4, respectively. Five bits of CQI information for cell 2 can be denoted as cqi2 ₀ through cqi2 ₄ and can be mapped to information bits a ₀ through a _4, respectively. cqi1 ₀ and cqi2 ₀ may be the least significant bits (LSB) of the CQI information, and cqi1 ₄ and cqi2 ₄ may be the most significant bits (MSB).

Table 5 - The first mapping of CQI information into information bits Information bits for HS-DPCCH a ₀ a ₁ a ₂ a ₃ a ₄ a ₅ a ₆ a ₇ a ₈ a ₉ CQI Information Bits for Cell 1 cqi1 ₀ cqi1 ₁ cqi1 ₂ cqi1 ₃ cqi1 ₄ CQI Information Bits for Cell 2 cqi2 ₀ cqi2 ₁ cqi2 ₂ cqi2 ₃ cqi2 ₄ PCI / CQI Information for MIMO pci ₀ pci ₁ cqi ₀ cqi ₁ cqi ₂ cqi ₃ cqi ₄ cqi ₅ cqi ₆ cqi ₇

Table 5 also shows the mapping of precoding control indication (PCI) and CQI information for MIMO to ten information bits. PCI information can contain two bits pci ₀ and pci ₁ , and CQI information for MIMO can contain eight bits cqi ₀ through cqi ₇ .

Ten information bits a ₀ through a ₉ for CQI information for two cells can be encoded in block code (20, 10) to obtain a code word, as follows:

,

,

where a _k denotes the k-th information bit,

b _i denotes the i-th code bit in the code word,

M _{i, k} denotes the i-th bit in the base sequence for the k-th information bit and

“Mod” means a modulo operation.

Ten information bits may be associated with ten different base sequences, with each base sequence including 20 bits. Each information bit a _k can be encoded by multiplying a _k with each bit M _{i, k of the} base sequence for such an information bit to obtain an encoded base sequence. Ten encoded base sequences for ten information bits, in this case, can be combined by modulo 2 addition to obtain a codeword composed of 20 code bits b ₀ through b ₁₉ .

In one design, the block code used for PCI and CQI information for MIMO can be reused for CQI information for two cells in DC-HSDPA in order to simplify implementation. The base sequences for the block code for MIMO are defined in TS 25.211 3GPP, entitled “Physical channels and mapping of transport channels onto physical channels (FDD)”, which are located in free access. Ideally, block code should provide equal protection (e.g., equal binary error rate (BER)) for all information bits. However, computer simulation shows that the block code for MIMO provides unequal protection for ten information bits, with information bits a ₂ and a ₆ having the highest BER and the other eight information bits having lower BER.

Table 6 shows a second execution of the CQI mapping. The second row of table 6 shows the degree of protection of each information bit, where rank 1 indicates the best protection, and rank 10 indicates the worst protection. Five bits of CQI information for cell 1 can be displayed in the last five information bits a ₅ through a ₉ , and five bits of CQI information for cell 2 can be displayed in the first five information bits a ₀ through a ₄ . For each cell, five CQI bits can be mapped to five information bits, so that progressively smaller, meaningful CQI bits are mapped to information bits with progressively less protection. This can improve performance, since more significant CQI bits may be more valuable when choosing the appropriate transport format. For cell 1, MSB cqi1 ₄ may map to bit a ₉ having the best protection, and LSB cqi1 ₀ may map to bit a ₆ having the worst protection. For cell 2, MSB cqi2 ₄ may be mapped to bit a ₄ having the best protection, and LSB cqi2 ₀ may be mapped to bit a ₂ having the worst protection.

Table 6 - second mapping of CQI information into information bits Information bits for HS-DPCCH a ₀ a ₁ a ₂ a ₃ a ₄ a ₅ a ₆ a ₇ a ₈ a ₉ Defense rank 8 7 9 6 5 four 10 3 2 one CQI Information Bits for Cell 1 cqi1 ₁ cqi1 ₀ cqi1 ₂ cqi1 ₃ cqi1 ₄ CQI Information Bits for Cell 2 cqi2 ₁ cqi2 ₂ cqi2 ₀ cqi2 ₃ cqi2 ₄

In general, the CQI information bits for each cell can be mapped to information bits in a natural order (for example, cqi _k can be mapped to a _k , as shown in Table 5) or in a rearranged order (for example, as shown in Table 6). Display in natural order can simplify the implementation. Rearranged mapping can improve performance when block code provides unequal protection for different information bits.

In another design, CQI information for two cells in a DC-HSDPA may be sent on an HS-DPCCH with one channelization code for each cell. In this design, five bits of CQI information for each cell can be encoded using a block code (20, 5) to obtain 20 code bits, which can then be sent on the HS-DPCCH in two intervals with a channelization code for such a cell.

UE 110 may be configured to report CQI information in each feedback loop spanning Q TTI, where in general Q ≥ 1. UE 110 may send CQI information in different ways depending on whether a single-code HS-DPCCH or two-code HS -DPCCH is used for DC-HSDPA.

FIG. 4A shows a design of sending CQI information for two cells with a single-HS-DPCCH for a feedback loop = 1. In each TTI, CQI information for two cells 1 and 2 can be multiplexed (for example, as shown in Table 5) and sent over HS- DPCCH with a single channelization code. CQIm (n) denotes CQI information for cell m in TTI n.

FIG. 4B shows a design for sending CQI information for two cells with a two-code HS-DPCCH for feedback loop = 1. In each TTI, CQI information for each cell can be sent on the HS-DPCCH with a channelization code for such a cell.

Fig. 5A shows a performance of sending CQI information for two cells with a single-HS-DPCCH for a feedback loop = 2. In each feedback cycle of two TTI, CQI information for two cells 1 and 2 can be multiplexed and sent on a single channel forming HS-DPCCH code in each of the two TTIs. CQI information may thus be repeated to improve reliability.

Fig. 5B shows a performance of sending CQI information for two cells with a two-code HS-DPCCH for feedback loop = 2. In each feedback cycle of two TTI, CQI information for cell 1 can be sent on the HS-DPCCH with a channelization code (e.g., C1) in the first TTI, and the CQI information for cell 2 can be sent on the HS-DPCCH with the same channelization code in the next TTI. The CQI information for cells 1 and 2, thus, can be sent in different TTIs with only one channelization code.

Fig. 6A shows a design of sending CQI information for two cells with a single-HS-DPCCH for a feedback loop = 4. In each feedback cycle of four TTI, CQI information for two cells 1 and 2 can be multiplexed and sent on a single channel forming HS-DPCCH code in each of the two TTIs, and no information may be sent in the last two TTIs. CQI information may thus be repeated to improve reliability.

FIG. 6B shows a performance of sending CQI information for two cells with a two-HS-DPCCH for a feedback loop = 4. In each of the four TTI feedback loops, CQI information for cell 1 can be sent on a HS-DPCCH with a channelization code (eg, C1) in the first TTI, CQI information for cell 2 may be sent on the HS-DPCCH with the same channelization code in the next TTI, and no information may be sent in the last two TTIs. The CQI information for cells 1 and 2, thus, can be sent in different TTIs with just one channelization code.

UE 110 may send HS-DPCCHs at transmit power P for HSDPA from a single cell. UE 110 may send HS-DPCCH at a higher transmit power (e.g., 2P) for two-cell DC-HSDPA, in order to take into account more control information sent over the HS-DPCCH and provide the required reliability for control information.

Computer simulations were performed to measure the performance of a single-code HS-DPCCH and two-code HS-DPCCH. Computer simulations show that decoding performance for ACK information can improve with a single-code HS-DPCCH. This may occur due to the use of the signaling values '1' and '-1' by the single-channel HS-DPCCH channel and the use of the signaling values '1', '-1' and '0' by the two-code HS-DPCCH channel. Computer simulations also show that decoding performance for CQI information can improve with a single-code HS-DPCCH due to joint coding of CQI information for two cells.

Table 7 shows a design of a data processing unit 700 for ACK and CQI information for two cells in DC-HSDPA. In this TTI, ACK information may be sent in the first TTI interval, and CQI information may be sent in the second and third TTI intervals.

As for the ACK information, the channel encoding unit 712 can encode ACK information for cells 1 and 2 (for example, based on the codebook shown in Table 2, 3 or 4, or some other codebook) and generate ten code bits w ₀ through w ₉ . A physical channel mapper 714 may allocate ten code bits by a channelization code for the HS-DPCCH to obtain distributed symbols. Block 714 may then scale the distributed symbols based on transmit power for the HS-DPCCH and may send scaled symbols in the first TTI interval.

Regarding the CQI information, the CQI mapping unit 722 can receive and display CQI information (e.g., SINR score) for cell 1 into five information bits cqi1 ₀ through cqi1 ₄ CQI. The CQI mapping unit 724 can receive and display CQI information for cell 2 into five information bits cqi2 ₀ through cqi2 ₄ CQI. Concatenation block 726 can combine the CQI information bits for cells 1 and 2 (for example, as shown in table 5) and produce ten information bits a ₀ through a ₉ . Channel coding unit 728 may encode ten information bits from block 726, for example, as shown in equation (1), and generate 20 code bits b ₀ through b ₁₉ . A physical channel mapper 730 may allocate 20 code bits with a channelization code for the HS-DPCCH to obtain distributed symbols. Block 730 can then scale the distributed symbols and send the scaled symbols in the second and third TTI intervals.

In general, any number of ACK information bits and any number of CQI information bits can be sent on the HS-DPCCH. A suitable block code may be used for ACK information based on the number of ACK information bits (or L levels). A suitable block code can also be used for CQI information based on the number of CQI information bits. The transmit power of the HS-DPCCH may be scaled based on the amount of ACK and CQI information to send in order to achieve the desired decoding performance at Node B 120.

In yet another aspect, a dynamic operation switching mode may be used, for example, when the UE 110 is operating in an area with limited maximum power. In such a scenario, the UE 110 may not have sufficient transmit power to send feedback information for two cells in DC-HSDPA. UE 110 may be configured with a CQI feedback loop larger than one, for example, feedback loop 2, 4, etc. Node B 120 may send an HS-SCCH command to instruct UE 110 to enter dynamic switching mode. In response to the HS-SCCH command, the UE 110 may send feedback information for two cells on the HS-DPCCH with one channelization code. If the UE 110 was operating with a single-code HS-DPCCH, then the UE 110 may continue to use a single channelization code for the HS-DPCCH. If the UE 110 was operating with a two-code HS-DPCCH, then the UE 110 may select one channelization code (e.g., C1) for the HS-DPCCH and may disable another channelization code (e.g., C2).

FIG. 8 shows the operation of the UE 110 in a dynamic switching mode in accordance with one embodiment. UE 110 may periodically measure the downlink of both cells 1 and 2. UE 110 may send CQI information for at most one cell in each TTI and may interlace between two cells in different TTIs. In the example shown in FIG. 8, the feedback loop is 2, and the UE 110 can send CQI information for one cell in even-numbered TTIs and can send CQI information for another cell in odd-numbered TTIs. A CQI time offset may be signaled to indicate which TTIs to use for sending CQI information for each cell.

In the design shown in FIG. 8, UE 110 may be scheduled to transmit data at most one hundredth (which is referred to as an active cell) in any given TTI. The active cell can send control information on the HS-SCCH and can send data on the HS-PDSCH to UE 110. UE 110 can process the HS-SCCH from both cells in each TTI and can process the HS-PDSCH from the cell whose control information is detected. UE 110 may then determine ACK information for the active cell and may send ACK information on the HS-DPCCH with the selected channelization code. In the example shown in FIG. 8, cell 1 can send data to UE 110 in downlink TTI n + 1, and UE 110 can send ACK information for data from cell 1 to uplink TTI n + 5. Cell 2 can send data to UE 110 in TTI n + 2 and n + 3 downlink, and UE 110 can send ACK information for data from cell 2 in TTI n + 6 and n + 7 uplink, respectively.

The dynamic switching mode may provide UE 110 the ability to receive downlink data transmission from a cell with a better downlink along with limiting uplink transmission to one channelization code that can improve the energy potential of the communication line when UE 110 is operating in a region with a limited maximum power.

In yet another embodiment of the dynamic switching mode, the UE 110 may send CQI information for two cells in different TTIs, for example, as shown in FIG. However, UE 110 may be scheduled for data transmission by cells of up to two in a given TTI. Each active cell can send control information on the HS-SCCH and can send data on the HS-PDSCH to UE 110. UE 110 can process the HS-SCCH from both cells in each TTI and can process the HS-PDSCH from each cell whose control information is detected . UE 110 may determine ACK information for two cells. In one design, the UE 110 may send ACK information for both cells on the HS-DPCCH with one channelization code. In this design, ACK information for both cells may be encoded, for example, as shown in Table 2 or 3. In another design, ACK information for each cell may be sent on the HS-DPCCH with a channelization code for such a cell. In this design, the ACK information for each cell can be encoded, for example, as shown in Table 4. Each cell can retransmit pending data or transmit new data based on ACK information for such a cell. If both cells transmit data to UE 110, but UE 110 receives data from only one cell (for example, data from another cell has been lost), then both cells can retransmit data to UE 110.

FIG. 9 shows a design of a process 900 for sending feedback information with a single channelization code. Process 900 may be performed by a UE (as described below) or some other entity. The UE may determine CQI information for the first cell (block 912) and may determine CQI information for the second cell (block 914). The UE may send CQI information for the first and second cells via a feedback channel (e.g., HS-DPCCH) with a single channelization code (e.g., OVSF code) (block 916). The UE may send CQI information for two cells in a single TTI when configured by one feedback loop (e.g., as shown in FIG. 4A), and each of a plurality of TTIs when configured by a feedback loop larger than one (e.g., as shown in figa or 6A).

The UE may process a first control channel (eg, HS-SCCH) from the first cell to detect control information sent to the UE (step 918). If control information is received from the first cell, then the UE may process the first data channel (eg, HS-PDSCH) from the first cell to receive data sent to the UE (step 920). The UE may process a second control channel from the second cell to detect control information sent to the UE (step 922). If control information is received from the second cell, then the UE may process the second data channel from the second cell to receive data sent to the UE (step 924).

The UE may determine ACK information for the first cell, for example, based on the processing results for the first data and control channels from the first cell (block 926). The UE may determine ACK information for the second cell, for example, based on the processing results for the second data and control channels from the second cell (step 928). The UE may send ACK information for the first and second cells on a feedback channel with a single channelization code (block 930).

In one design, the UE may receive ACK, NACK, or DTX for each cell based on processing results for data channels and control from such a cell. The UE may encode ACK information for the first and second cells based on the block code to obtain a codeword. In one embodiment, the block code may implement a codebook containing (i) two codewords for ACK or NACK for the first cell and DTX for the second cell, (ii) four codewords for four combinations of ACK and NACK for the first and second cells and (iii ) two codewords for ACK or NACK for the second cell and DTX for the first cell, for example, as shown in table 2 or 3. The codebook can additionally contain two codewords for the preamble and the final part for the feedback channel, for example, as shown in table 3. The code book may contain all or a subset of of codewords used for sending ACK information for a MIMO transmission. The UE may send a codeword in a feedback channel with a single channelization code.

In one design, the UE may send ACK information for the first and second cells on one branch of a feedback channel with a single channelization code. In yet another design, the UE may send ACK information for a first cell on a channel I feedback channel branch with a channelization code and may send ACK information for a second cell on a Q channel feedback channel branch with the same channelization code.

10 shows a design of a sequence of 1000 operations for receiving feedback information sent with a single channelization code. The sequence of operations 1000 may be performed by the Node B (as described below) and / or some other network entity. The Node B may receive CQI information for the first and second cells sent from the UE via a feedback channel with a single channelization code (step 1012). The Node B may schedule the UE to transmit data from at least one of the first and second cells (block 1014). The Node B may send control information from at least one cell to the UE (step 1016). The Node B may also send data from at least one cell to the UE (block 1018). The Node B may select a transport format for each cell based on the CQI information for such a cell. The Node B may send data from each cell in accordance with the transport format selected for such a cell.

The Node B may receive ACK information for the first and second cells sent from the UE via a feedback channel with a single channelization code (block 1020). In one design, the Node B may decode the transmission received on the feedback channel based on the block code to obtain a codeword sent by the UE for ACK information. Node B can then receive ACK, NACK, or DTX for each cell based on the codeword.

11 shows a design of a process 1100 for sending feedback information with a plurality of channelization codes. Process 1100 may be performed by a UE (as described below) or some other entity. The UE may determine CQI information for the first cell (block 1112) and may determine CQI information for the second cell (block 1114). The UE may send CQI information for the first and second cells on the feedback channel (block 1116). In one design, the UE may send CQI information for the first and second cells via a feedback channel with the first and second channelization codes, respectively, in a single TTI, for example, as shown in FIG. 4B. In another design, the UE may send CQI information for the first and second cells via a feedback channel with one channelization code in different TTIs, for example, as shown in FIG. 5B or 6B.

The UE may process the first control channel from the first cell to detect control information sent to the UE (block 1118). If control information is received from the first cell, then the UE may process the first data channel from the first cell to receive data sent to the UE (block 1120). The UE may process a second control channel from the second cell to detect control information sent to the UE (block 1122). If control information is received from the second cell, then the UE may process the second data channel from the second cell to receive data sent to the UE (block 1124).

The UE may determine ACK information for the first cell, for example, based on the processing results for the first data and control channels from the first cell (block 1126). The UE may determine ACK information for the second cell, for example, based on the processing results for the second data and control channels from the second cell (block 1128). The UE may send ACK information for the first cell on a feedback channel with a first channelization code (block 1130). The UE may send ACK information for the second cell through a feedback channel with a second channelization code (block 1132).

In one design, the UE may receive ACK, NACK, or DTX for each cell based on processing results for data channels and control from that cell. The UE may encode ACK information for each cell based on the block code to obtain a codeword for the cell. The block code may implement a codebook containing a first codeword for ACK, a second codeword for NACK, and a third codeword for DTX, for example, as shown in Table 4. The UE may send codewords for the first and second cells via the feedback channel with the first and second channelization codes, respectively.

12 shows a design of a workflow 1200 for sending CQI information with a single channelization code. Process 1200 may be performed by a UE (as described below) or some other entity. The UE may determine CQI information for the first cell (block 1212) and may determine CQI information for the second cell (block 1214). The UE may map the CQI information for the first cell to the first set of information bits, for example, bits a ₅ through a ₉ (block 1216), and may map the CQI information for the second cell to the second set of information bits, for example, bits a ₀ to a ₄ (step 1218). The UE may map the CQI information bits for each cell to information bits in the natural order (for example, as shown in table 5) or in the rearranged order (for example, as shown in table 6). The UE may encode the first and second subsets of information bits to obtain a codeword (block 1220) and may send the code word through a feedback channel with a single channelization code (block 1222).

The UE may receive data sent by the first cell in accordance with the first transport format selected based on the CQI information for the first cell (block 1224). The UE may receive data sent by the second cell in accordance with the second transport format selected based on the CQI information for the second cell (block 1226). The UE may determine ACK information for the first and second cells (step 1228) and may send ACK information on a feedback channel with a single channelization code (step 1230).

13 shows a design of a process 1300 for operating a UE. The UE may determine CQI information for the first cell (block 1312) and may determine CQI information for the second cell (block 1314). The UE may send CQI information for the first cell in the first TTI (block 1316) and may send CQI information for the second cell in the second TTI after the first TTI (block 1318). The UE may send CQI information for two cells on a feedback channel with a single channelization code.

The UE may receive data from the first cell or the second cell in the third TTI after the second TTI (block 1320). The UE may receive a command to operate in dynamic switching mode, and then may receive data from at most one cell in any given TTI while operating in dynamic switching mode. The UE may determine ACK information for data received from the first cell or second cell (block 1322), and may send ACK information via a single channel forming code feedback channel (block 1324).

For clarity, most of the description above covers two cells. The methods described herein may also be used for more than two hundred. The methods can additionally be used to transmit data on multiple carriers from a single cell or different cells. In general, the methods can be used to transmit data over any number of communication lines, where the communication line may correspond to a cell, a carrier, or some other channel.

Fig. 14 shows a block diagram of a design of UE 110 and Node B 120 in Fig. 1. Node B 120 can be equipped with T antennas from 1432a to 1432t, and UE 110 can be equipped with R antennas from 1452a to 1452r, where in the general case T ≥ 1 and R ≥ 1. Node B 120 can support many cells, and each cell can send data to one or more UEs in each TTI.

At Node B 120, a transmit processor 1420 may receive data for one or more UEs from a data source 1412, process (eg, encode and modulate) data for each UE, and provide data symbols for all UEs. Transmission processor 1420 may also receive control information from controller / processor 1440, process control information, and provide control characters. Transmit processor 1420 may also generate pilot symbols and may multiplex pilot symbols with data symbols and control symbols. The MIMO processor 1422 may process (eg, pre-encode) characters from the transmit processor 1420 (if applicable) and provide T output symbol streams to T modulators 1430a through 1430t (MOD). Each modulator 1430 may process its output symbol stream (e.g., for CDMA) to obtain an output sample stream. Each modulator 1430 can additionally lead to predetermined conditions (for example, convert to analog form, filter, amplify and convert with increasing frequency) its output sample stream to generate a downlink signal. T downlink signals from modulators 1430a through 1430t can be transmitted through T antennas from 1432a through 1432t, respectively.

At UE 110, antennas 1452a through 1452r may receive downlink signals from Node B 120. Each antenna 1452 may provide a received signal to an associated demodulator 1454 (DEMOD). Each demodulator 1454 can lead to predetermined conditions (for example, filter, amplify, downconvert, and digitize) its received signal to obtain input samples and can additionally process input samples to obtain received symbols. The MIMO detector 1456 can perform MIMO detection on the received symbols from all R demodulators 1454a through 1454r and provide detected symbols. A receive processor 1458 may process (eg, demodulate and decode) the detected symbols, provide decoded data for the UE 110 to the data receiver 1460, and provide decoded control information to the controller / processor 1470.

At UE 110, data from a data source 1462 and feedback information (e.g., ACK and / or CQI information) from a controller / processor 1470 may be processed by a transmit processor 1464 and pre-encoded by a MIMO processor 1466 (if applicable) to obtain R output symbol streams. R modulators 1454a through 1454r may process R output symbol streams to obtain R output sample streams and may additionally lead to specified conditions output sample streams to receive R uplink signals that can be transmitted via R antennas 1452a through 1452r. At Node B 120, uplink signals from UE 110 can be received by antennas 1432a through 14321, adjusted to desired conditions, and processed by demodulators 1430a through 1430t and further processed by a MIMO detector 1434 (if applicable) and a receive processor 1436 to recover data and feedback information communications sent by UE 110. A receive processor 1436 may provide decoded data to a data receiver 1438 and provide decoded feedback information to a controller / processor 1440.

Controllers / processors 1440 and 1470 can control operation at Node B 120 and UE 110, respectively. The processor 1440 and / or other processors and modules in the Node B 120 may perform or direct the sequence of operations 1000 in figure 10 and / or other sequence of operations for the methods described in the materials of this application. The processor 1470 and / or other processors and modules on the UE 110 may perform or direct the sequence 900 of operations in Fig.9, the sequence 1100 of operations in Fig.11, the sequence of 1200 operations in Fig.12, the sequence 1300 of operations in Fig.13 and / or other sequences of operations for the methods described herein. Memory 1442 and 1472 may store data and control programs for Node B 120 and UE 110, respectively. Scheduler 1444 may schedule the UE to transmit data on the downlink and / or uplink for each cell and may assign resources to the scheduled UEs.

Specialists in the art would understand that information and signals can be represented using any of a variety of different methods and techniques. For example, data, commands, instructions, information, signals, bits, symbols, and pseudo-noise sequence symbols, which may be referenced throughout the description above, may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination of them.

Those skilled in the art would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above, typically in terms of their functionality. Whether such functionality is implemented in the form of hardware or software depends on the specific application and performance restrictions imposed on the entire system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of this disclosure.

The various illustrative logical blocks, modules, and circuits described in connection with the disclosure in the materials of this application can be implemented or performed using a general-purpose processor, a digital signal processor (DSP), a specialized integrated circuit (ASIC), a user-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform functions first described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in RAM memory (RAM, random access memory), flash memory, ROM memory (ROM, read-only memory), EPROM memory (EPROM, erasable programmable ROM), EEPROM memory (EEPROM, electrically erasable programmable ROM) , registers, on a hard disk, a removable disk, a CD-ROM (ROM on a CD), or any other kind of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from and write information to the storage medium. Alternatively, the storage medium may be integral with the processor. The processor and the storage medium may reside in an ASIC. ASIC may reside in a user terminal. Alternatively, the processor and the storage medium may reside as discrete components in a user terminal.

In one or more exemplary embodiments, the described functions may be implemented in hardware, software, hardware-software, or any combination thereof. If implemented in software, the functions may be stored in or transmitted as one or more instructions or a machine program on a machine-readable medium. Computer-readable media include both computer storage media and a communication medium, including any medium that facilitates transferring a computer program from one place to another. Storage media may be any available media that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, such machine-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage device, magnetic disk storage device or other magnetic storage device, or any other medium that can be used for transferring or storing the required means of the control program in the form of commands or data structures and which can be accessed by a general-purpose or special-purpose computer or a general-purpose processor change or special purpose. In addition, any connection, in fact, is expressed by a machine-readable medium. For example, if you transfer software from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair cable, digital subscriber line (DSL), or wireless technologies such as infrared, radio frequency, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio frequency, and microwave are included in the media definition. The disc includes a compact disc (CD), a laser disc, an optical disc, a digital multifunctional disc (DVD), a flexible magnetic disk and a blu-ray disc, the discs usually reproducing data magnetically and optically using lasers. Combinations of the above should also be included within the scope of computer-readable media.

The foregoing description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined in the materials of this application can be applied to other options without departing from the spirit or scope of the disclosure. Thus, the disclosure is not meant to be limited by the examples and implementations described in the materials of this application, but should be consistent, the broadest volume, not contradicting the principles and latest features disclosed in the materials of this application.

Claims (47)

1. A method for wireless communication, comprising the steps of:
processing a first control channel from a first cell to detect control information sent by the first cell to a user equipment (UE);
processing the first data channel from the first cell, if control information is received from the first cell, to receive data sent by the first cell to the UE;
processing a second control channel from a second cell to detect control information sent by the second cell to the UE;
processing a second data channel from a second cell, if control information is received from the second cell, to receive data sent by the second cell to the UE,
determining confirmation information (ACK) for the first cell by the UE based on the processing results for the first control channel and the first data channel from the first cell;
determining ACK information for the second cell by the UE based on the processing results for the second control channel and the second data channel from the second cell; and
send ACK information for the first and second cells on the feedback channel with a single channel-forming code. 2. The method according to claim 1, in which the determination of the ACK information for the first cell comprises the steps of receiving the ACK, negative acknowledgment (NACK) or discontinuous transmission (DTX) for the first cell based on the processing results for data channels and control from the first cell and wherein determining the ACK information for the second cell comprises the step of obtaining an ACK, NACK or DTX for the second cell based on the processing results for the data and control channels from the second cell. 3. The method according to claim 1, further comprising stages in which:
encode ACK information for the first and second cells based on the block code to obtain a codeword, and the codeword is sent through the feedback channel with a single channelization code. 4. The method according to claim 3, in which the block code implements a codebook containing two codewords for ACK or negative acknowledgment (NACK) for the first cell and discontinuous transmission (DTX) for the second cell, four codewords for four combinations of ACK and NACK for the first and second cells and two codewords for ASK or NACK for the second cell and DTX for the first cell. 5. The method according to claim 4, in which the codebook further comprises two codewords for the preamble and the final part for the feedback channel. 6. The method according to claim 3, in which the block code implements a codebook containing at least a subset of the set of code words used to send ACK information for transmission with many inputs and many outputs (MIMO). 7. The method according to claim 1, wherein sending the ACK information for the first and second cells comprises the steps of sending ACK information for the first cell on the in-phase (I) branch of the feedback channel with a single channelization code, and
send ACK information for the second cell on the quadrature (Q) branch of the feedback channel with a single channelization code. 8. The method according to claim 1, further comprising stages in which:
determining channel quality indication information (CQI) for the first cell;
determining CQI information for a second cell; and send CQI information for the first and second cells on the feedback channel with a single channelization code. 9. The method of claim 8, wherein sending the CQI information comprises the steps of:
send CQI information for the first and second cells in a single transmission time interval (TTI) if the UE is configured by a feedback loop of one, and
send CQI information for the first and second cells in each of the plurality of TTIs if the UE is configured by a feedback loop greater than one. 10. The method according to claim 1, in which the control channel from each cell contains a shared control channel for HS-DSCH (HS-SCCH), the data channel from each cell contains a high speed physical downlink shared channel (HS-PDSCH), the feedback channel contains a dedicated physical control channel for HS-DSCH (HS-DPCCH) and the channelization code contains an orthogonal code with a variable spreading coefficient (OVSF). 11. A device for wireless communication, comprising:
means for processing the first control channel from the first cell for detecting control information sent by the first cell to user equipment (UE);
means for processing the first data channel from the first cell, if control information is received from the first cell, for receiving data sent by the first cell to the UE;
means for processing the second control channel from the second cell for detecting control information sent by the second cell to the UE;
means for processing the second data channel from the second cell, if control information is received from the second cell, for receiving data sent by the second cell to the UE;
means for determining acknowledgment information (ACK) for the first cell by the UE based on the processing results for the first control channel and the first data channel from the first cell;
means for determining ACK information for the second cell by the UE based on the processing results for the second control channel and the second data channel from the second cell; and
means for sending ACK information for the first and second cell via a feedback channel with a single channelization code. 12. The device according to claim 11, in which the means for determining ACK information for the first cell comprises means for receiving ACK, negative acknowledgment (NACK) or discontinuous transmission (DTX) for the first cell based on processing results for data channels and control from the first cell and wherein the means for determining ACK information for the second cell comprises means for obtaining ACK, NACK or DTX for the second cell based on the processing results for the data and control channels from the second cell. 13. The device according to claim 11, further comprising:
means for encoding ACK information for the first and second cells based on the block code to obtain a codeword for transmission on the feedback channel with a single channelization code, wherein the block code implements a codebook containing two codewords for ACK or negative acknowledgment (NACK) for the first cell and discontinuous transmission (DTX) for the second cell, four codewords for four combinations of ACK and NACK for the first and second cells and two codewords for ACK or NACK for the second cell and DTX for the first cell. 14. The device according to claim 11, further comprising:
means for determining channel quality indication information (CQI) for the first cell;
means for determining CQI information for the second cell; and means for sending CQI information for the first and second cells on the feedback channel with a single channelization code. 15. A device for wireless communication, comprising:
at least one processor configured for:
processing the first control channel from the first cell to detect control information sent by the first cell to user equipment (UE);
processing the first data channel from the first cell, if control information is received from the first cell, to receive data sent by the first cell to the UE;
processing the second control channel from the second cell to detect control information sent by the second cell to the UE;
processing the second data channel from the second cell, if control information is received from the second cell, to receive data sent by the second cell to the UE;
determining acknowledgment information (ACK) for the first cell by the UE based on the processing results for the first control channel and the first data channel from the first cell;
determining ACK information for the second cell by the UE based on the processing results for the second control channel and the second data channel from the second cell; and
sending ACK information for the first and second cells on the feedback channel with a single channel-forming code. 16. The device according to clause 15, in which at least one processor is configured to receive ACK, negative acknowledgment (NACK) or discontinuous transmission (DTX) for the first cell based on the processing results for data channels and control from the first cell, and to obtain ACK, NACK or DTX for the second cell based on the processing results for the data and control channels from the second cell. 17. The device according to clause 15, in which at least one processor is configured to encode ACK information for the first and second cells based on the block code to receive a code word, and to send a code word through a feedback channel with a single channel forming code, and wherein the block code implements a codebook containing two codewords for ASK or negative acknowledgment (NACK) for the first cell and discontinuous transmission (DTX) for the second cell, four codewords for four combinations of ASK and NACK for the first and second cells and two codewords for ACK or NACK for the second cell and DTX for the first cell. 18. The device according to clause 15, in which at least one processor is configured to determine channel quality indication (CQI) information for the first cell, to determine CQI information for the second cell and to send CQI information for the first and second cells via the feedback channel with a single channel forming code. 19. A method for wireless communication, comprising the steps of:
sending data from at least one of the first and second cells to a user equipment (UE);
receiving confirmation information (ACK) for the first and second cells sent by the UE via a feedback channel with a single channelization code;
receiving channel quality indication (CQI) information for the first and second cells sent by the UE on the feedback channel with a single channelization code;
planning the UE to transmit data from at least one cell from among the first and second cells; and
selecting a transport format for each of the at least one cell based on the CQI information for the cell, and sending the data comprises the step of sending data from each of the at least one cell to the UE in accordance with the transport format selected for the cell. 20. The method according to claim 19, further comprising stages in which:
planning the UE to transmit data from at least one cell from among the first and second cells; and
sending control information on a control channel from each cell scheduled to send data to the UE, and the data sending comprises the step of sending data on a data channel from each cell scheduled to send data to the UE. 21. The method according to claim 19, further comprising stages in which:
decode the transmission received on the feedback channel based on the block code to obtain a codeword sent by the UE for ACK information; and
receive ASK, negative acknowledgment (NACK) or intermittent transmission (DTX) for each of the first and second cells based on the code word. 22. A device for wireless communication, comprising:
means for sending data from at least one of the first and second cells to user equipment (UE);
means for receiving confirmation information (ACK) for the first and second cells sent by the UE via a feedback channel with a single channelization code;
means for receiving channel quality indication information (CQI) for the first and second cells sent by the UE on the feedback channel with a single channelization code;
means for scheduling a UE for transmitting data from at least one cell from among the first and second cells; and
means for selecting a transport format for each of the at least one cell based on CQI information for the cell, and wherein the means for sending data comprises means for sending data from each of the at least one cell to the UE in accordance with the transport format selected for honeycombs. 23. The device according to item 22, further comprising:
means for scheduling a UE for transmitting data from at least one cell from among the first and second cells; and
means for sending control information on a control channel from each of at least one cell to the UE, and wherein the means for sending data comprises means for sending data on a data channel from each of at least one cell to the UE. 24. The device according to item 22, further comprising:
means for decoding a transmission received on the feedback channel based on the block code to obtain a codeword sent by the UE for ACK information; and means for receiving an ACK, negative acknowledgment (NACK) or discontinuous transmission (DTX) for each of the first and second cells based on the codeword. 25. A method for wireless communication, comprising the steps of:
determining acknowledgment information (ACK) for the first cell by the user equipment (UE);
determining acknowledgment information (ACK) for the second cell by the UE;
send ACK information for the first cell through a feedback channel with a first channelization code; and
send ACK information for the second cell through a feedback channel with a second channelization code. 26. The method according A.25, optionally containing stages in which:
processing the first control channel from the first cell to detect control information sent by the first cell to the UE;
processing the first data channel from the first cell, if control information is received from the first cell, to receive data sent by the first cell to the UE;
processing a second control channel from a second cell to detect control information sent by the second cell to the UE; and
processing a second data channel from the second cell, if control information is received from the second cell, to receive data sent by the second cell to the UE, the ACK information for the first cell being determined based on the processing results for the first control channel and the first data channel from the first cell, and wherein the ACK information for the second cell is determined based on the processing results for the second control channel and the second data channel from the second cell. 27. The method according A.25, in which the determination of ACK information for the first cell contains the steps of receiving ACK, negative acknowledgment (NACK) or discontinuous transmission (DTX) for the first cell based on the processing results for data channels and control from the first cell and wherein determining the ACK information for the second cell comprises the step of obtaining an ACK, NACK or DTX for the second cell based on the processing results for the data and control channels from the second cell. 28. The method according A.25, optionally containing stages in which:
encode ACK information for the first cell based on the block code to obtain a first codeword; and
encode ACK information for the second cell based on the block code to obtain a second codeword, and wherein the first and second codewords are sent via the feedback channel to the first and second channelization codes, respectively. 29. The method of claim 28, wherein the block code implements a codebook containing a first codeword for ACK, a second codeword for negative acknowledgment (NACK), and a third codeword for discontinuous transmission (DTX) for a cell. 30. The method according A.25, further comprising stages, in which:
determining channel quality indication information (CQI) for the first cell;
determining CQI information for a second cell;
send CQI information for the first cell through a feedback channel with a first channelization code; and
send CQI information for the second cell through a feedback channel with a second channelization code. 31. The method according A.25, further comprising stages, in which:
determining channel quality indication information (CQI) for the first cell;
determining CQI information for a second cell;
send CQI information for the first cell on a feedback channel with a selected channelization code in a first transmission time interval (TTI), the selected channelization code being the first or second channelization code; and
send CQI information for the second cell on the feedback channel with the selected channelization code in the second TTI after the first TTI. 32. A method for wireless communication, comprising the steps of:
determining channel quality indication information (CQI) for a first cell in a user equipment (UE);
determining CQI information for the second cell on the UE;
displaying CQI information for the first cell in a first set of information bits;
display CQI information for the second cell in a second set of information bits;
encode the first and second sets of information bits to obtain a codeword; and
send a code word through a feedback channel with a single channel forming code. 33. The method according to p, in which the display of CQI information for the first cell comprises the step of mapping the bits of CQI information for the first cell into information bits in the first set in a natural order, and displaying the CQI information for the second cell comprises which maps the CQI information bits for the second cell to information bits in the second set in the natural order. 34. The method according to p, further comprising stages in which:
receiving data sent by the first cell in accordance with the first transport format selected based on CQI information for the first cell;
receiving data sent by the second cell in accordance with the second transport format selected based on the CQI information for the second cell;
determining confirmation information (ASK) for the first and second cells; and
send ACK information for the first and second cells on the feedback channel with a single channel-forming code. 35. A device for wireless communication, comprising:
means for determining channel quality indication information (CQI) for a first cell on a user equipment (UE), means for determining CQI information for a second cell on a UE;
means for mapping CQI information for the first cell to a first set of information bits;
means for mapping CQI information for the second cell into a second set of information bits;
means for encoding the first and second sets of information bits to obtain a codeword; and
means for sending a code word through a feedback channel with a single channel forming code. 36. The apparatus of claim 35, wherein the means for displaying CQI information for the first cell comprises means for mapping the CQI information bits for the first cell to information bits in the first set in a natural order, and wherein the means for displaying CQI information for the second cell comprises means for mapping the CQI information bits for the second cell to information bits in the second set in a natural order. 37. The device according to clause 35, further comprising:
means for receiving data sent by the first cell in accordance with the first transport format selected based on CQI information for the first cell;
means for receiving data sent by the second cell in accordance with the second transport format selected based on the CQI information for the second cell;
means for determining confirmation information (ASK) for the first and second cells; and
means for sending ACK information for the first and second cells via a feedback channel with a single channel-forming code. 38. A method for wireless communication, comprising the steps of:
determining channel quality indication information (CQI) for a first cell in a user equipment (UE);
determining CQI information for the second cell on the UE;
send CQI information for the first cell in a first transmission time interval (TTI);
send CQI information for the second cell in the second TTI after the first TTI; and
receive data from the first cell or second cell in the third TTI after the second TTI. 39. The method of claim 38, wherein the CQI information for the first and second cells is sent via a feedback channel with a single channelization code to the first and second cells. 40. The method according to § 38, further comprising stages in which:
accepting a command to operate in dynamic switching mode by the UE; and
receive data from no more than one cell from among the first and second cells in each transmission time interval (TTI), while operating in a dynamic switching mode. 41. The method according to § 38, further comprising stages in which:
determining acknowledgment information (ASK) for data received from the first cell or the second cell; and
send the ACK information on the feedback channel with a single channelization code, and the CQI information for the first and second cells is sent on the feedback channel with a single channelization code. 42. A device for wireless communication, comprising:
at least one processor configured for:
determining channel quality indication (CQI) information for the first cell on user equipment (UE);
determining CQI information for the second cell on the UE;
mapping CQI information for the first cell into a first set of information bits;
mapping CQI information for the second cell into a second set of information bits;
encoding the first and second sets of information bits to obtain a codeword; and
sending a code word through a feedback channel with a single channel forming code. 43. A device for wireless communication, comprising:
at least one processor configured for:
determining channel quality indication (CQI) information for the first cell on user equipment (UE);
determining CQI information for the second cell on the UE;
sending CQI information for the first cell in a first transmission time interval (TTI);
sending CQI information for the second cell in the second TTI after the first TTI; and
receiving data from the first cell or second cell in the third TTI after the second TTI. 44. A device for wireless communication, comprising:
means for determining channel quality indication information (CQI) for the first cell on user equipment (UE);
means for determining CQI information for the second cell on the UE;
means for sending CQI information for the first cell in a first transmission time interval (TTI);
means for sending CQI information for the second cell in the second TTI after the first TTI; and
means for receiving data from the first cell or second cell in the third TTI after the second TTI. 45. A device for wireless communication, comprising:
at least one processor configured for:
sending data from at least one of the first and second cells to a user equipment (UE);
receiving acknowledgment information (ASK) for the first and second cells sent by the UE via a feedback channel with a single channelization code;
receiving channel quality indication (CQI) information for the first and second cells sent by the UE on the feedback channel with a single channelization code;
scheduling UEs for transmitting data from at least one cell from among the first and second cells; and
selecting a transport format for each of the at least one cell based on the CQI information for the cell, and sending the data comprises the step of sending data from each of the at least one cell to the UE in accordance with the transport format selected for the cell. 46. A device for wireless communication, comprising:
at least one processor configured for:
determining acknowledgment information (ACK) for the first cell by the user equipment (UE);
determining acknowledgment information (ACK) for the second cell by the UE;
sending ACK information for the first cell via a feedback channel with a first channel forming code; and
sending ACK information for the second cell via a feedback channel with a second channelization code. 47. A device for wireless communication, comprising:
means for determining acknowledgment information (ACK) for the first cell by the user equipment (UE);
means for determining acknowledgment information (ACK) for the second cell by the UE;
means for sending ACK information for the first cell through a feedback channel with a first channelization code; and
means for sending ACK information for the second cell through a feedback channel with a second channelization code.

Images