CN1917411B - System and method for realization of accessing high speed down going packets in multiple carriers - Google Patents

Abstract

The invention discloses a system and method for realizing multi-carrier high-speed downlink packet access. Control information and data information are transmitted between a sending end and a receiving end through multiple carriers. The mapping to the carrier is completed in the physical channel mapping process of the physical layer, and then each carrier is independently spread-spectrum modulated, transmitted over the air, and the receiving end receives each carrier, and after demodulation and despreading, the data is merged during the inverse mapping of the physical channel. The invention has strong compatibility and greatly improves the HSDPA downlink data transmission throughput capacity of the TD-SCDMA system.

Description

A system and method for realizing multi-carrier high-speed downlink packet access

technical field

The invention relates to the technical field of digital mobile communication, in particular to a system and method for supporting multi-carrier high-speed downlink packet access in a third-generation Time Division Duplex Synchronous Code Division Multiple Access (TD-SCDMA) system.

Background technique

3GPP introduced the High Speed Downlink Packet Access (HSDPA: High Speed Downlink Packet Access) feature in Release 5 of the 3G specification. The purpose is to provide higher-speed downlink packet services and increase downlink capacity. Based on the UMTS R4 architecture, HSDPA achieves the above goals by introducing technologies such as Adaptive Modulation and Coding (AMC: Adaptive Modulation and Coding) and Hybrid Automatic Retransmission Request (HARQ: Hybrid Automatic Retransmission Request).

Fundamentally speaking, in order to improve the throughput on the air interface, it is necessary to make full use of spectrum resources, that is, to increase spectrum utilization as much as possible. Due to the constraints of the existing 3GPP network architecture, the HSDPA system needs to improve the spectrum utilization rate through two ways: fast link self-adaptation and reduced network processing delay.

From the perspective of link adaptation, AMC technology determines the current channel capacity according to the channel situation (channel state information CSI), and determines the appropriate coding and modulation mode according to the capacity, so as to send information to the maximum and achieve a relatively high rate; moreover, For each user's channel quality change, AMC can provide a correspondingly changeable modulation and coding scheme, thereby improving the transmission rate and spectrum utilization. However, AMC cannot fully guarantee accurate adaptation to link conditions. Since the link changes are very complex and the speed of change is not the same, the adjustment of the link coding and modulation mode by the AMC according to the measurement results may not completely match the current link instantaneous conditions every time.

HARQ technology just makes up for the deficiency of AMC self-adaptation. HARQ is an error correction method that combines traditional ARQ (Automatic retransmission request) technology and forward error correction (FEC) technology. The code sent by the sending end can not only detect errors, but also have certain error correction capabilities. After the receiving end receives the information, if the error is within the error correction capability, it will automatically correct the error. If it exceeds the error correction capability of the error correction code, but it can be detected, the receiving end will feed back the corresponding signal to the sending end, requesting to send side resend. HARQ's adaptive performance on the link is that it takes the correct data reception as the overall goal, and automatically determines the number of retransmissions according to the link situation. If the AMC adjustment is not accurate enough, there may be a large number of bit errors in the first data transmission, and HARQ will automatically request retransmission. If the link condition is still not good during retransmission, the receiving end still cannot correctly decode the previous two transmissions. Then the second retransmission is automatically requested until it is decoded correctly (unless it is impossible to correct the error, the system will treat it as a packet loss or hand it over to the upper layer for processing). Therefore, in this sense, HARQ is a more "perfect" link adaptive technology, and it can cooperate well with AMC to complete link adaptation in the HSDPA system.

Another aspect of the problem is reducing processing delays. In the 3GPP R4 system, the data service transmission TTI (Transmission Time Interval, Transmission Time Interval) is at least 10ms. For services with a large amount of data, it may even be 80ms. Speed is bad. Thus in HSDPA, TTI must be reduced. At the same time, system resources and link control are implemented at the RRC (Radio Resource Control) layer, and the current RRC protocol is implemented at the Radio Network Controller (RNC: Radio Network Controller). The signal transmission delay between the RNC and the terminal equipment will be very large, resulting in a large control signal delay, which is extremely unfavorable for fast link adaptation, and the reduction of the control signal delay is very necessary. 3GPP TD-SCDMA R5 HSDPA reduces the TTI of control signal transmission on the one hand, and on the other hand moves the resource control and scheduling function from RNC to Node B (Node B), thus saving the processing time between RNC and NodeB delay. Specifically, HSDPA introduces several channels in the physical layer of the air interface: HS-PDSCH (High Speed Physical Downlink Shared Channel), HS-SCCH (High Speed Shared Control Channel) and HS-SICH (High Speed Shared Information Channel) ) complete the transmission of high-speed data and control information respectively. The MAC-hs (Medium Access Control for HSDPA) entity introduced in the MAC (Media Access Control) layer completes related scheduling, multiplexing and control functions. Whether the air interface is a data channel or a control channel, the transmission time interval TTI is 5ms. At the same time, many control and scheduling functions in the HSDPA system are transferred to MAC-hs, and the MAC-hs entity on the network side is placed in NodeB To achieve, remove the signal processing delay between NodeB and RNC.

In short, HSDPA in 3GPP R5 greatly improves the air interface throughput through the above-mentioned technical means. Theoretically, the downlink of a single carrier frequency (5MHz for uplink and downlink) of the FDD system can provide a peak service rate of up to 14.4Mbps, and the downlink of a single carrier frequency (1.6MHZ) of the TD-SCDMA system can provide a peak rate of 2.8Mbps. Although TD-SCDMA and FDD systems are basically equal in terms of spectrum utilization, there is a big gap between the two in terms of service capabilities provided to users. In the current TD-SCDMA system, the maximum service rate that users can obtain It is 2.8Mbps. The reason is that the current TD-SCDMA system is built on the premise that the UE (terminal) works on a single carrier frequency.

With the application of high-speed data services, it becomes very necessary to further improve the downlink throughput capability of TD-SCDMA system. A feasible method is to combine the two technologies of multi-carrier and HSDPA to provide users with better rate services. However, there is no system and method capable of supporting multi-carrier HSDPA in the current prior art.

Contents of the invention

The technical problem solved by the invention is to propose a system and method capable of supporting multi-carrier HSDPA, and overcome the problems of low air interface throughput and low frequency spectrum utilization in the prior art.

In order to solve the above-mentioned technical problems, the present invention proposes a method for realizing multi-carrier high-speed downlink packet access, which is applied to a time division duplex synchronous code division multiple access system, and transmits control information and Data information, data carrier splitting is carried out at the physical layer of the sending end, and the mapping of the sending data stream to the carrier is completed during the physical channel mapping process of the physical layer, and then each carrier is independently spread spectrum modulated, transmitted over the air, and the receiving end receives each carrier, After the respective demodulation and despreading, the combination of data is completed during the inverse mapping of the physical channel.

In the above-mentioned method, two ways can be used to divide the carrier data: one is that the sending end adopts the principle of equal allocation to allocate the amount of data to be transmitted to each carrier, and the control information of each carrier is the same, and each carrier shares the control information. The control information includes at least the data packet size and modulation mode of each carrier; the second is that the sending end uses the non-equal allocation principle to allocate the amount of data to be transmitted to each carrier, that is, each carrier determines the data to be transmitted according to the channel conditions measured by each carrier. volume size.

The present invention also provides a system for realizing multi-carrier high-speed downlink packet access, including a sending end, a receiving end and channels between the sending and receiving ends, including a set of data channels and control channels from sending to receiving, and a set of data channels and control channels from receiving to sending. The group control channel is used for information feedback. It is characterized in that the sending end and the receiving end work in a multi-carrier mode. The data of a user can be transmitted on multiple carriers at the same time. Each carrier contains a high-speed downlink shared data channel. Carriers share a control channel, the physical layer of the sending end completes the data distribution, and then each carrier independently performs spread spectrum modulation, air transmission, the receiving end completes the independent reception of each carrier, and completes the data during the inverse mapping of the physical channel after demodulation and despreading merge.

Based on the 3GPP R5 framework, the present invention provides a multi-carrier HSDPA system and method capable of realizing physical layer offloading. Through the expansion of carrier frequency resources, it provides users of the TD-SCDMA system with a theoretical peak rate of up to N×2.8M, greatly improving TD-SCDMA The HSDPA downlink data transmission throughput capability of the system.

Description of drawings

Fig. 1 is a brief schematic diagram of the multi-carrier HSDPA application system of the present invention

Figure 2 is a schematic diagram of the layered structure of TD-SCDMA R5 HSDPA

Figure 3 is a schematic diagram of TD-SCDMA R5 HSDPA HS-SCCH data field and its encoding

Figure 4 is a schematic diagram of TD-SCDMA R5 HSDPA HS-SICH data field and its encoding

Fig. 5 is the TD-SCDMA multi-carrier HSDPA schematic diagram of the present invention's physical layer multi-carrier average distribution

Fig. 6 is a schematic diagram of the HS-SCCH domain structure of the multi-carrier average distribution HSDPA in the physical layer of the present invention

Figure 7 is a schematic diagram of the HS-SCCH domain structure of the physical layer multi-carrier non-equal distribution HSDPA in the present invention

Figure 8 is a schematic diagram of the HS-SICH domain structure of the physical layer multi-carrier non-equal distribution HSDPA in the present invention

Fig. 9 is a schematic diagram of the HS-SICH domain structure and encoding of the multi-carrier average distribution HSDPA in the physical layer of the present invention

Detailed ways

The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings.

The system for realizing multi-carrier high-speed downlink packet access in the present invention includes a sending end, a receiving end, and channels between the sending and receiving ends, including a set of data channels and control channels from sending to receiving, and a set of control channels from receiving to sending It is used for information feedback. It is characterized in that the sending end and the receiving end work in a multi-carrier mode. The data of a user can be transmitted on multiple carriers at the same time. Each carrier contains a high-speed downlink shared data channel, and multiple carriers share For a control channel, the physical layer of the sending end completes the data distribution, and then each carrier independently performs spread spectrum modulation, air transmission, and the receiving end completes the independent reception of each carrier, and after demodulation and despreading, the data is merged during the inverse mapping of the physical channel.

Figure 1 is a schematic diagram of a simplified multi-carrier HSDPA application system, which is composed of a NodeB and two terminals. The NodeB implements downlink high-speed data transmission through N carrier frequencies and terminals 1 and 2 respectively. Wherein, the link from the NodeB to the terminal is a downlink, and the communication link from the terminal to the NodeB is an uplink.

The TD-SCDMA system supports multiple types of services, such as voice and data packets. Service data is processed in the form of transport channels, and one UE may include multiple transport channels. These transmission channels are then mapped to corresponding physical channels (determined by channelization codes, time slots, and carrier frequencies, etc.), and finally data transmission is completed through the air interface.

The data packets are multiplexed to the downlink transmission channel - High Speed Downlink Shared Channel (HS-DSCH: High Speed Downlink Shared Channel) in a burst mode, and the transmission channel HS-DSCH is then mapped to the HS-PDSCH. The HS-PDSCH is shared by multiple users in the cell in a time-division or code-division manner, and its transmission time interval TTI is 5ms. The HS-PDSCH carries the user's data information, and the relevant control information used for HS-PDSCH reception is transmitted through the accompanying HS-SCCH, and the HS-SICH is used for the transmission of uplink feedback information. Therefore, these three physical channels form a physical layer closed loop, and they are all processed and transmitted in units of 5ms TTI. In addition, for the transmission of RRC signaling, 3GPP has also defined uplink and downlink accompanying physical channels in R5, which are used to carry RRC signaling related to HSDPA.

Figure 2 is a two-layer simple protocol model closely related to TD-SCDMA R5 air interface and HSDPA. Layer 1 is the physical layer (phylayer), and layer 2 includes the RLC sublayer and the MAC sublayer. The RLC sublayer ensures the reliable transmission of the wireless link and mainly completes ARQ. In terms of implementation, the RLC is generally located at the RNC. Since there is a long time delay (including transmission time delay and processing time delay) between the RNC and the UE, the ARQ at the RLC layer generally has a long time delay. The RLC layer and lower layer data streams are logical channels.

MAC is further decomposed into two sublayers, namely MAC-d (Medium Access Control fordedicated channel) and MAC-hs. MAC-d specifically completes: mapping from logical channels to transport channels, multiplexing of logical channels, encryption and decryption, etc. The data between the MAC-d sublayer and the MAC-hs sublayer is transmitted in the form of MAC-dflow, and each MAC-dflow is associated with a certain scheduling attribute. MAC-hs completes the scheduling of data packets, HARQ, etc., and provides the data interface of the physical layer at the same time.

The physical layer specifically completes the receiving and sending processing of data and signaling, that is, encoding/decoding, multiplexing/demultiplexing, modulation/demodulation, and wireless transmission and reception.

Figure 3 is a schematic diagram of the TD-SCDMA R5 HSDPA HS-SCCH data field and its encoding. In TD-SCDMA R5 HSDPA, along with HS-DSCH transmission, the control information related to HS-DSCH is sent through the control channel HS-SCCH. These control information include: HARQ Process ID 6101, redundancy version 6102, new data identifier NDI 6103, HS-SCCH cycle sequence number HCSN 6104, UEID 6105, modulation mode MF, transport block size identifier and physical channel resources.

Wherein the HARQ Process ID indicates a specific HARQ Process for sending data packets. During HSDPA data transmission, each MAC-hs PDU (Protocol Date Unit) data packet may be transmitted once or multiple times until the UTRAN side receives ACK response information on HS-SICH or decides to discard the data packet due to timeout . The process of one or more retransmissions is completed by the N-Channel SAW protocol (N-Channel SAW). Each MAC-hs PDU data packet is associated with a specific HARQ process on the sending side, and a HARQ Process is equivalent to a stop-waiting SAW protocol entity. After receiving the Process ID, the receiving end also allocates the same HARQProcess to form a peer-to-peer protocol entity with the sending side for receiving MAC-hs PDU data packets. If the receiving end receives the data correctly, the ACK signal is fed back through the uplink control channel HS-SICH, and the HARQ Process on the sending side is released. On the contrary, if it fails to receive correctly, buffer the soft data, and feed back a NAK response signal through the HS-SICH, and the process at the sending side resends the data packet.

NDI is used to indicate that the transmitted MAC-hs PDU data packet is a new data packet, not a retransmission packet. In order to improve system performance, the HARQ technology used in HSDPA, the receiving end does not discard the transmission data packets that cannot be decoded correctly, but softly merges the cached and retransmitted data packets, and sends the merged data to be decoded, thereby improving Probability of correct decoding after retransmission. Different HARQs are produced according to the different ways of combining. The TD-SCDMA R5 HSDPA system mainly uses two types of IR and CC, which will not be described in detail here. The new data identification pair is used to inform the UE whether the transmitted data packet is a new data packet or a retransmitted data packet. If it is a new data packet, all previously cached data can be cleared.

There is a certain timing relationship between HS-SCCH and HS-DSCH, which can ensure that the receiving end can correctly receive HS-DSCH data by using the control information in it after receiving HS-SCCH correctly.

The uplink control channel corresponding to the HS-SCCH is the HS-SICH, as shown in FIG. 4 . HS-SICH carries the feedback information of HS-DSCH, including: recommended modulation mode RMF 7101, recommended transport block size RTBS 7102, and confirmation information ACK/NAK 7201 for correct transmission of data. The AMC technology introduced by the HSDPA system is a coding and modulation method determined adaptively according to the condition of the downlink. Reflected in the TD-SCDMA system, the receiving end measures the downlink, determines the encoding and modulation methods according to the downlink signal-to-noise ratio, and converts them into the transmission block size. It is sent to the network side through HS-SICH. The network side can directly use the received UE CQI (Channel Quality Indicator) information according to the situation, or can choose another coding and modulation method, so the CQI transmitted by the UE is called recommended information. In addition to CQI, ACK/NAK is used to judge whether HARQ retransmission. Like HS-SCCH, HS-SICH also has a relatively fixed timing relationship with HS-DSCH.

3GPP R5 TD-SCDMA HSDPA, based on the original R4 network structure, adds three physical channels HS-PDSCH, HS-SCCH and HS-SICH through the physical layer, and adds MAC-hs to the MAC layer to provide HSDPA functions. In order to further increase the transmission rate of downlink packet data, TD-SCDMA multi-carrier HSDPA needs to introduce multi-carrier technology on the basis of R5 HSDPA, so that the downlink packet data packets of the same user can be transmitted through multiple carriers, thereby providing higher service rates.

Two embodiments of the present invention are described in further detail below.

Embodiment 1 Physical layer multi-carrier average distribution HSDPA

In this solution, the sender adopts the principle of equal allocation to allocate the amount of data to be transmitted to each carrier. The control information of each carrier is the same, and each carrier shares the control information. The control information includes at least the packet size and modulation mode of each carrier. .

Fig. 5 is a schematic diagram of this embodiment. The downlink data of a supported multi-carrier HSDPA UE is processed by MAC-d and sent to MAC-hs. Under the control and scheduling of MAC-hs, HS-DSCH data packets and corresponding downlink control signaling information are formed and sent to to the physical layer. The size of the HS-DSCH transport block is determined by MAC-hs according to the uplink feedback information and the overall situation of the cell.

Multi-carrier HSDPA transmission channel processing includes CRC Attachment (cyclic redundancy check coding), Code Block Segmentation (code block segmentation), Channel Coding (channel coding), Physical LayerHARQ Functionality (HARQ physical layer function), Bit Scrambling (bit scrambling ), HS-DSCHInterleaving (high-speed downlink shared channel interleaving), Constellation Rearrangement for 16QAM and Physical Channel Mapping (16QAM constellation rearrangement and physical channel mapping). Except for HS-DSCH Interleaving and Physical Channel Mapping, other processing functions are exactly the same as single carrier HSDPA.

The HS-DSCH Interleaving part considers the characteristics of multiple carriers, and adds a level of intercarrier interleaving before the original interleaving. Specifically, assuming that data is transmitted on N carriers, the input is written column by column in an N×C matrix, and then read out row by row. Wherein C is the smallest integer whose N×C is not less than the number of HS-DSCH data bits. Then perform single-carrier HS-DSCH Interleaving processing on each row of data.

Physical Channel Mapping maps data to the physical channel provided in the MAC-hs downlink control signaling information. Carrier mapping is done first. Assuming that there are N carriers, the data is divided into N segments of equal length according to the number of carriers. If the data cannot be divided into equal lengths, the padding bit '0' is added. Each piece of data corresponds to a carrier. Then complete the mapping of data on each carrier, and its mapping method is exactly the same as that of single carrier HSDPA. After Physical Channel Mapping, it is sent after spread spectrum modulation.

The UE at the receiving end receives the data of each carrier, each carrier is processed separately to complete data demodulation, and the data of each carrier is combined during the inverse mapping of the physical channel.

The control process is similar to the single-carrier HSDPA mode. Each HS-DSCH TTI in the uplink and downlink directions has a physical layer control channel, namely HS-SCCH and HS-SICH. In particular, one downlink HS-SCCH actually includes two code channels. Unless otherwise specified, one HS-SCCH refers to two physical code channels.

In the downlink direction, MAC-hs provides relevant control information to the physical layer, including modulation mode, transport block size, and physical channel resources.

Downlink control signaling information is combined into HS-SCCH at the physical layer, and its data structure is slightly different from that of single-carrier HSDPA, see Figure 6. As mentioned above, N bits are added to the HS-SCCH in multi-carrier HSDPA to indicate the current carrier frequency situation (Figure 6 assumes that N=6 carriers, and the actual system may not be limited to 6 carriers). For the sake of simplicity, in the multi-carrier HSDPA system, physical channel resource allocation uses the same time slot on each carrier, and each time slot occupies the same channelization code. This is also the benefit of evenly distributing the amount of data. In addition, when the size of the multi-carrier transport block is expanded, the original 6 bits for identifying the transport block need to be expanded (9 bits are used as an example in FIG. 6 for illustration, but it is not limited to 9 bits actually).

In the uplink direction, HS-SICH is used to feed back CQI and ACK/NAK information. As in the uplink direction, the size of the transport block in the CQI increases, so the bit width indicated by the block size needs to increase. Figure 9 shows the information field of the uplink feedback signal HS-SICH and related coding characteristics, where the transport block size identifier is illustrated by taking 9 bits as an example (not limited to 9 bits), corresponding to this, the original transport block size encoding The way (32, 6) ^1st order Reed-Muller code is changed to (32, 10) ^2nd order Reed-Muller code. See TS25.222 4.3.3.1 for details.

A downlink control channel is always associated with an uplink control channel, and the uplink and downlink control channels are called a pair. Considering multi-user sharing, each user in TD-SCDMA R5 HSDPA allocates four pairs of control channels, and only one pair is selected for the transmission of control information in each TTI, but in the case of continuous transmission, the control channel remains unchanged. Therefore, in addition to continuous transmission, the UE must search to determine control channel information. In the case of multi-carrier HSDPA, this mechanism remains.

Embodiment 2 Physical layer multi-carrier uneven distribution HSDPA

In this solution, the sender uses the principle of non-equal distribution to allocate the amount of data to be transmitted on each carrier, that is, each carrier determines the amount of data to be transmitted according to the channel conditions measured by each carrier. After the data flow is CRCAttachment, each carrier independently completes channel coding, interleaving, physical channel mapping and spread spectrum modulation, and the processing methods of each part are the same as single carrier HSDPA. At the receiving end, each carrier independently completes demodulation, despreading, and decoding, and then completes the combination of multiple carriers, and then performs CRC verification.

The process of processing multi-carrier high-speed downlink packet data by the physical layer at the sending end includes multi-carrier high-speed downlink shared channel interleaving. The amount of data on N carriers is different. When interleaving, they are first concatenated and then divided into N segments of the same size. C interleaving, then concatenating, and then segmenting according to the size of each carrier data block, the size of the data block allocated to each carrier before and after interleaving is the same, where C is the minimum integer of N×C not less than the number of data bits of the high-speed downlink shared channel.

In terms of control flow, the control information of each carrier must be provided on the downlink control channel, including the used physical channel resources, modulation mode, transport block size, RV (redundancy version), etc., see Figure 7.

The uplink control channel also needs to feed back the CQI of each carrier, as shown in Figure 8.

The control channel still consists of a pair of uplink and downlink, and each user configures up to four pairs, and only one pair is selected for control information transmission within one TTI. For continuous transmission, the control channel pair does not need to be changed, so the UE still uses the last data control channel information, otherwise it needs to search.

MAC-hs needs to refer to the feedback of each uplink carrier parameter, consider the actual available physical resources, determine the size of the data block that can be transmitted on each carrier, and then combine them together as the size of a complete MAC-hs PDU. MAC-hs uses this parameter to form MAC-hs PDU and perform scheduling. At the same time, MAC-hs notifies each carrier of physical channel resources, modulation mode, transport block size, RV and other control information to the physical layer for corresponding control and formation of downlink control channels.

Applying the method and system of the present invention to realize multi-carrier HSDPA allows the HSDPA downlink data of a user to be transmitted on multiple carriers at the same time. Since a peak service rate of 2.8Mbps can be provided on a single carrier, under the multi-carrier situation, the single user can be greatly improved. business rate. Theoretically, N carriers working simultaneously can provide users with up to N*2.8Mbps services. At the same time, as far as the TD-SCDMA system is concerned, the single-carrier design spectrum is 1.6M, and the chip rate is 1.28MCPS. Since the frequency band is relatively narrow, it is entirely possible for an operator to allocate multiple frequency band resources. So from the point of view of network design, multi-carrier HSDPA is also feasible.

Claims (8)

1. A method for realizing multi-carrier high-speed downlink packet access, which is applied to a time division duplex synchronous code division multiple access system, is characterized in that, between the sending end and the receiving end, control information and data information are transmitted by multiple carriers, and the data Carrier splitting is carried out at the physical layer of the sending end, and then each carrier is independently spread-spectrum modulated, transmitted over the air, and the receiving end receives each carrier, and after demodulation and despreading, data merging is completed during the inverse mapping of the physical channel; among them, the mapped The method is exactly the same as the single-carrier high-speed downlink packet access; Wherein, when carrying out the carrier splitting of the data, the physical layer of the sending end adopts the principle of equal allocation to allocate the data to be transmitted to each carrier, and the control information of each carrier is the same, and each carrier shares these control information, and the control information Including at least the data packet size and modulation method of each carrier; or, when performing the carrier splitting of the data, the physical layer of the sending end adopts the principle of non-equal distribution to allocate the data to be transmitted to each carrier, that is, each carrier is based on its own measurement The channel conditions determine the data size of the respective transfers. 2. the method as described in right 1, it is characterized in that, when the physical layer of sending end adopts the principle of average distribution to distribute the data to be transmitted to each carrier, when the physical layer of sending end carries out data allocation and mapping to each carrier, the data is Mapped to the physical channel provided in the downlink control information of the high-speed media access control layer, the data is first divided. If there are N carriers, the data is divided into N segments of equal length according to the number of carriers. If the data cannot wait For long division, add padding bits '0', each piece of data corresponds to a carrier, and then complete the mapping of data on each carrier. 3. The method as claimed in right 1, wherein, when the physical layer of the sending end adopts the principle of equal distribution to allocate data to be transmitted to each carrier, before the sending data of each carrier is mapped to the physical channel of the carrier, the sending The process of processing multi-carrier high-speed downlink packet data by the physical layer of the end includes multi-carrier high-speed downlink shared channel interleaving. If the data is transmitted on N carriers, the input is written column by column in an N×C matrix, and then read out row by row. , and then perform single-carrier high-speed downlink shared channel interleaving processing on each row of data, where C is the minimum integer of N×C not less than the number of high-speed downlink shared channel data bits. 4. The method as claimed in right 1, characterized in that, when the physical layer of the sending end adopts the principle of equal distribution to distribute the data to be transmitted to each carrier, it also includes the downlink and uplink control process, and the transmission is carried out before the data transmission respectively. The process controls and feeds back information after the data is sent; for the downlink control process: the high-speed media access control layer at the sending end provides downlink control information to the physical layer, including modulation mode, transport block size, and physical channel resources. The downlink control information is in the physical layer When combined into a high-speed shared control channel, N bits are used to indicate the current use of carrier frequency resources, and N is the number of carriers. At the same time, the size of the downlink transmission block is expanded according to the needs of multi-carrier transmission, and the bit width indicating the size of the identification transmission block is increased; for the uplink Control process: In the uplink direction, the receiving end uses the high-speed shared information channel to feed back the channel quality indication and response information, and increases the transport block size in the channel quality indication and the bit width of the transport block size indication according to the needs of multi-carrier transmission. 5. the method as described in right 1, it is characterized in that, when the physical layer of sending end adopts the non-equal distribution principle to distribute the data to be transmitted to each carrier, it also includes the downlink and uplink control process, respectively before data transmission to the described The transmission process is controlled and the information is fed back after the data is sent; for the downlink control process: the high-speed medium access control layer at the sending end uses the downlink control channel to provide control information for each carrier, including the physical channel resources used, the modulation method, and the size of the transmission block and redundant version; for the uplink control process: the receiving end uses the uplink control channel to feed back the channel quality indication of each carrier. 6. The method according to claim 1, wherein when the physical layer of the sending end adopts the principle of non-equal allocation to allocate data to be transmitted to each carrier, the allocation of data to be transmitted to each carrier specifically includes: high-speed media The access control layer determines the transmittable data block size on each carrier according to the feedback of each uplink carrier parameter and the actual available physical resources, and then sums the transmittable data block size on each carrier and uses it as a high-speed medium A parameter of the size of the protocol data unit of the access control layer, which is used by the high-speed medium access control layer to form a high-speed medium access control layer protocol data unit and perform scheduling. 7. The method according to right 1, wherein when the physical layer of the transmitting end adopts the principle of non-equal allocation to allocate data to be transmitted to each carrier, before mapping the sending data of each carrier to the physical channel of the carrier, The process of processing multi-carrier high-speed downlink packet data by the physical layer of the sending end includes multi-carrier high-speed downlink shared channel interleaving. If the amount of data on multiple carriers is different, they are concatenated first during interleaving, and then divided into N segments of the same size. ×C interleaving, then concatenated, and then segmented according to the size of each carrier data block, the size of the data block allocated to each carrier before and after interleaving is the same, where C is the minimum integer of N×C not less than the number of data bits of the high-speed downlink shared channel . 8. A system for realizing multi-carrier high-speed downlink packet access, including a sending end, a receiving end, and channels between the sending and receiving ends, including a set of data channels and control channels from sending to receiving, and a set of user channels from receiving to sending The control channel based on information feedback is characterized in that the control information and data information are transmitted between the sending end and the receiving end through multiple carriers, and the data of a user is transmitted on multiple carriers at the same time, and each carrier contains a high-speed downlink sharing Data channel, multiple carriers share a control channel, the physical layer of the sending end completes the data distribution, and then each carrier independently performs spread spectrum modulation, air transmission, the receiving end completes independent reception of each carrier, and after demodulation and despreading, it is inversely mapped on the physical channel The combination of data is completed at that time; wherein, the mapping method is exactly the same as that of the single-carrier high-speed downlink packet access; wherein, when carrying out the carrier splitting of the data, the physical layer of the sending end adopts the principle of equal allocation to allocate the data to be transmitted to each carrier. For data, the control information of each carrier is the same, and each carrier shares the control information, and the control information includes at least the data packet size and modulation mode of each carrier; or, when performing the carrier splitting of the data, the sending end The physical layer allocates the data to be transmitted to each carrier using the principle of non-equal allocation, that is, each carrier determines the size of the data to be transmitted according to the channel conditions measured by each carrier.

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