CN102932874A - Method and system for data transmission, user equipment and node B - Google Patents

Abstract

The embodiment of the invention discloses a data transmission method and system, user equipment and a base station. The method includes: the user equipment UE determines the transmission time interval TTI type of the common enhanced uplink dedicated channel Common E-DCH to be used by the UE; during the access process, sends a first message to the base station; the first message carries The TTI type of the Common E-DCH to be used; receiving a second message from the base station; the second message carries information that the UE is not allowed to access, or the second message carries information that the UE is allowed to access information and information indicating the TTI used by the UE; if the access is allowed, perform data transmission according to the type of TTI used by the UE indicated by the second message. The problem of low utilization of network resources caused by fixed allocation can be avoided, thereby improving the utilization of network resources.

Description

A data transmission method and system, user equipment and base station

technical field

The present invention relates to the field of communication technology, in particular to a data transmission method and system, user equipment and a base station.

Background technique

With the rapid development of communication technology, Wideband Code Division MultBP20110510le Access (WCDMA), as one of the mainstream technologies of the third generation mobile communication system, has been widely researched and applied worldwide.

In order to increase the data transmission rate and meet different needs, WCDMA introduces High Speed Downlink Packet Access (HSDPA) technology, enabling the downlink to achieve a speed of up to 14.4Mbit/s. In order to improve the performance of WCDMA system, HSDPA has made a lot of enhancements on the wireless interface, reflected in the physical layer and media access control (MAC, Media Access Control) layer mainly including: shorter transmission time interval (Transmission Time Interval, TTI), new High Speed Downlink Shared Channel (HS-DSCH); the introduction of 16QAM (quadrature amplitude modulation, quadrature amplitude modulation) modulation, code division multiplexing and time division multiplexing, the new uplink control channel, the use of automatic Adaptive Modulation and Coding (AMC) realizes fast link adaptation, uses Hybrid Automatic Repeat Request (HARQ), fast scheduling based on base station (Node B), etc.

HSDPA in WCDMA is the optimization and evolution of WCDMA downlink for packet services. In order to optimize and evolve the uplink for packet services, the High Speed Uplink Packet Access (HSUPA) technology is introduced. Similar to HSDPA technology, HSUPA uses hybrid automatic repeat request HARQ, Node B-based fast scheduling, and 2ms (milliseconds) TTI short frame transmission. HSUPA enables the maximum uplink data throughput rate of a single cell to reach 5.76Mbit/s, which greatly enhances the data service bearing capacity and spectrum utilization rate of WCDMA uplink.

The Enhanced CELL Forward AccessChanne state in Frequent Division Duplex (Enhanced CELL_FACH state in FDD) feature aims to solve how to reduce the downlink signaling delay and overcome the limitation of public transmission channels . Through the use of HS-DSCH in CELL_FACH, Cell Paging Channel CELL_PCH, and Universal Terrestrial Radio Access Network Registration Area (CELL_URA) status, lower signaling is achieved Latency and higher downlink transmission rate.

In the Third Generation Partnersh BP20110510Project (3GPP) WCDMA, in order to continue to enhance the CELL-FACH state, the Enhanced CELL_FACH state in FDD feature is introduced to realize the enhanced uplink dedicated channel (Enhanceduplink DCH, E-DCH ) instead of physical random access channel (Physical Random Access Channel, PRACH) transmission, to further optimize the delay of uplink signaling and data.

After implementing High Speed Uplink Packet Access (HSPA) transmission in the uplink and downlink of the CELL-FACH state, it can effectively carry some "always on" services that always exist, which is characterized by user equipment (User EquBP20110510ment, The data packet transmission between the UE) and the base station is frequent but the data volume is small. At this time, if it is carried in the CELL_DCH state, the use of network resources is very inefficient, and the number of users that the cell can support will also be reduced. In the current Universal Mobile Telecommunications System (UMTS) network, especially in G3 developed markets, there are more and more smart devices, and the amount of network data processing is increasing rapidly. How to reduce delay and improve transmission efficiency is an urgent problem to be solved. Therefore, the industry hopes to further enhance the CELL-FACH state, so as to make the UE stay in the CELL-FACH state for a long time to carry related services.

Currently, a frame structure of an Acquisition Indication Channel (AICH) is defined. The common (common) E-DCH resource is currently configured by the network and uses several types of TTI; for example: whether to use 2ms or 10ms TTI. The common E-DCH resource configuration performed by the network is configured at the cell level. In order to achieve better coverage, the network tends to configure a TTI of 10ms. The same data block is sent in 10ms TTI and 2ms TTI. In order to achieve the same bit error rate (BIT ERROR RATIO, BER), the transmission power is different, and the transmission power of 10ms TTI is smaller. When the data to be sent is larger, the coding gain is lower, so to achieve the same bit error rate, the power required is higher. Since the total transmit power of the UE is fixed, when the performance of the UE is not good at the edge of the cell, the power required for a TTI of 2 ms is large, and the power available for boosting is limited when the performance is not good; if the interference is not considered The problem is that after the maximum transmit power of the UE is increased, the performance of the UE is still poor. Using a TTI of 10ms requires less power, so the space that can be raised is larger than that of a TTI of 2ms. In addition, less data is sent per unit time, and better performance is easy to obtain.

If the scheme of configuring a larger TTI is implemented, even if the UE has a larger power headroom (power headroom), it cannot use the TTI of 2ms, which limits the uplink data rate. Correspondingly, if the network configures a TTI of 2ms, UEs with a smaller power headroom cannot use a TTI of 10ms to improve coverage performance. In order to solve this problem, the following scheme is proposed.

First, divide the TTI resources of 2ms and TTI resources of 10ms into two sets; UE decides to request TTI resources of 2ms or 10ms according to whether the initial transmission power of the access preamble (preamble) exceeds a certain threshold value; UE makes a decision between 2ms and 10ms After selection, Node B decides the TTI type used by the UE; this solution introduces a new preamble scrambling code and a new common common E-DCH resource list, the resource list includes TTI resources of 2ms and 10ms, and the signature sequence is divided into two sets, Correspondingly request TTI resources of 2ms and 10ms respectively. In the above scheme, after dividing the limited TTI resources into 2ms and 10ms TTI resources, the application of TTI resources is fixed. Assume that there are a total of 20 access resources, which are fixedly divided into 10 resources corresponding to 2ms TTI, and 10 resources corresponding to 10ms TTI. corresponding resources. If there are 11 users applying for 10msTTI type, even if there are still 10 resources corresponding to 2msTTI vacant at this time, there must be 1 user who cannot access, which shows that the resource utilization rate of this solution is low.

In the above solutions, introducing new preamble scrambling codes and new common E-DCH resource lists at the same time will not only increase the system resource occupancy, but also the fixed application of TTI resources will lead to low utilization of network resources.

Contents of the invention

Various aspects of the present invention provide a data transmission method and system, a user equipment and a base station, which are used to reduce the occupancy rate of system resources and improve the utilization rate of network resources.

An aspect of the present invention provides a data transmission method, comprising:

The user equipment UE determines the transmission time interval TTI type of the common enhanced uplink dedicated channel CommonE-DCH to be used by the UE;

During the access process, a first message is sent to the base station; the first message carries the TTI type of the Common E-DCH to be used;

Receive a second message from the base station; the second message carries information that the UE is not allowed to access, or, the second message carries information that allows the UE to access and information indicating the TTI type used by the UE; if allowed access, perform data transmission according to the TTI type indicated by the second message to be used by the UE.

Another aspect of the present invention provides a data transmission method, comprising:

The base station receives the first message sent by the UE during the access process; the first message carries the transmission time interval TTI type of the Common E-DCH to be used by the UE;

Determine whether to allow the UE to access and allow the UE to perform data transmission using the TTI type;

Sending a second message to the UE, where the second message carries information that the UE is not allowed to access, or, the second message carries information that the UE is allowed to access and information that indicates the TTI type used by the UE.

Another aspect of the present invention provides a user equipment, including:

The TTI determination unit is used to determine the transmission time interval TTI type of the public enhanced uplink dedicated channel Common E-DCH to be used by the user equipment UE

The first message sending unit is configured to send a first message to the base station during the access process; the first message carries the TTI type of the Common E-DCH to be used;

The second message receiving unit is configured to receive a second message, the second message carries information that the UE is not allowed to access, or the second message carries information that the UE is allowed to access and indicates the TTI type used by the UE Information;

The data transmission unit is configured to perform data transmission according to the TTI type used by the UE indicated by the second message if the second message carries information that the UE is allowed to access.

Another aspect of the present invention provides a base station, including:

The first message receiving unit is configured to receive the first message sent by the UE during the access process; the first message carries the transmission time interval TTI type of the Common E-DCH to be used by the UE;

A determining unit, configured to determine whether to allow the UE to access and to allow the UE to perform data transmission using the TTI type;

The second message sending unit is configured to send a second message to the UE, the second message carrying information that the UE is not allowed to access, or the second message carrying information that the UE is allowed to access and instructing the UE Information about the type of TTI used.

Another aspect of the present invention provides a data transmission system, including: any one of the user equipment provided in the embodiments of the present invention and/or any one of the base stations provided in the embodiments of the present invention.

It can be seen from the above technical solutions that the problem of low utilization of network resources caused by fixed allocation can be avoided, thereby improving the utilization of network resources.

Description of drawings

Fig. 1 is a schematic flow chart of the method of the embodiment of the present invention;

Fig. 2 is a schematic diagram of idle bit mapping relationship according to an embodiment of the present invention;

Fig. 3 is a schematic flow chart of the method of the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention;

Fig. 11 is a schematic diagram of the system structure of the embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a data transmission method, user equipment and a base station, which are used to reduce system resource occupancy and improve network resource utilization.

In the following description, for purposes of illustration rather than limitation, specific details such as specific system architectures, interfaces, and techniques are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

The various technologies described in this article can be used in various wireless communication systems, such as current 2G, 3G communication systems and next-generation communication systems, such as Global System for Mobile Communications (GSM, Global System for Mobile communications), Code Division Multiple Access (CDMA, Code Division Multiple Access) system, Time Division Multiple Access (TDMA, Time Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access Wireless), Frequency Division Multiple Access (FDMA, Frequency Division Multiple Addressing) system, is Orthogonal Frequency-Division Multiple Access (OFDMA, Orthogonal Frequency-Division Multiple Access) system, Single Carrier FDMA (SC-FDMA) system, General Packet Radio Service (GPRS, General Packet Radio Service) system, Long Term Evolution (LTE, Long Term Evolution) system , and other such communication systems.

Various aspects are described herein in connection with terminals and/or base stations and/or base station controllers.

The terminal may be a wireless terminal or a wired terminal. The wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (for example, RAN, Radio Access Network), and the wireless terminal can be a mobile terminal, such as a mobile phone (or called a "cellular" phone) and a mobile terminal The computers, which may be, for example, portable, pocket, handheld, built-in or vehicle-mounted mobile devices, exchange speech and/or data with the radio access network. For example, Personal Communication Service (PCS, Personal Communication Service) telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL, Wireless Local Loop) station, Personal Digital Assistant (PDA, Personal Digital Assistant) and other equipment. The wireless terminal can also be called a system, a subscriber unit (Subscriber Unit), a subscriber station (Subscriber Station), a mobile station (Mobile Station), a mobile station (Mobile), a remote station (Remote Station), an access point (Access Point), Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment.

A base station (eg, access point) can refer to a device in an access network that communicates with wireless terminals over the air interface through one or more sectors. The base station can be used to convert received over-the-air frames to and from IP packets, acting as a router between the wireless terminal and the rest of the access network, which can include an Internet Protocol (IP) network. The base station may also coordinate attribute management for the air interface. For example, the base station can be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or a base station (NodeB) in WCDMA, or an evolved base station (NodeB or eNB or e-NodeB, evolutional NodeB) in LTE. B), the present invention is not limited.

The base station controller may be a base station controller (BSC, base station controller) in GSM or CDMA, or a radio network controller (RNC, Radio Network Controller) in WCDMA, which is not limited in the present invention.

Additionally, the terms "system" and "network" are often used herein interchangeably. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

The transmission time interval (TTI) type refers to a type divided according to the size of the transmission time interval. For example, TTI is 2ms (milliseconds), 10ms (milliseconds).

An embodiment of the present invention provides a data transmission method, and the solution of this embodiment is implemented by a UE, as shown in FIG. 1 .

101: The user equipment UE determines the transmission time interval TTI type of the Common Enhanced Uplink Dedicated Channel CommonE-DCH to be used by the UE.

For example, the way for the UE to determine the TTI type may be to monitor the channel quality of the UE and determine it according to the capabilities of the UE. For example, in the subsequent embodiments, the power headroom is used as an example for description, and the specific determination method is not limited in the embodiments of the present invention.

102: During the access process, send a first message to the base station; the first message carries the TTI type of the Common E-DCH to be used.

In another embodiment of the present invention, the foregoing network access may be performed in the cell forward access channel CELL_FACH state, and of course may also be in other network access states. This embodiment of the present invention does not limit this.

In another embodiment of the present invention, in the above-mentioned 102, the first message is a request message, and the above-mentioned request message carries the TTI type of the Common E-DCH to be used; or, the above-mentioned first message is a notification message, and the above-mentioned notification message Carry the TTI type of the Common E-DCH to be used above. The two possibilities of the first message are given above, which will be described in detail in subsequent embodiments respectively.

In another embodiment of the present invention, in the above-mentioned 102, sending the first message to the base station; the above-mentioned sending the first message to the base station; the above-mentioned first message carrying the TTI type of the Common E-DCH to be used includes: Select a signature from the predetermined signature subset corresponding to the above TTI type, and send the access preamble carrying the above signature to the base station; or, select a scrambling code from the preset scrambling code set corresponding to the above TTI type, and send The access preamble scrambled by using the above scrambling code is sent to the base station, and each scrambling code in the above scrambling code set corresponds to the acquisition indicator channel AICH. For this, more specific illustrations will be given in subsequent examples.

In another embodiment of the present invention, the signature or scrambling code corresponding to the above TTI has been set before the implementation of this embodiment, and the specific setting work can be performed by network equipment, such as network equipment such as base stations and base station controllers, The specific setting execution subject and process are not limited in this embodiment of the present invention. The above signature is an orthogonal sequence, and the signature subset is also an orthogonal sequence subset; the access preamble can be sent on the physical random access channel PRACH; the above signature can be the signature signature of CELL_FACH.

103: Receive a second message from the base station; the second message carries information that the UE is not allowed to access, or the second message carries information that the UE is allowed to access and information indicating the TTI type used by the UE.

The TTI type indicated above for the UE to use may be determined according to the TTI type of the Common E-DCH to be used by the UE.

In another embodiment of the present invention, if the above-mentioned first message is a request message, the above-mentioned second message carrying the information of allowing the above-mentioned UE to access and the information indicating the TTI type used by the UE includes: monitoring on at least two AICHs from For the second message of the base station, if the above-mentioned second message is received on one of the AICHs, it is determined that the base station allows the UE to access and indicates the TTI type used by the UE, and the AICH receiving the above-mentioned second message corresponds to the TTI type; or, in one The information that the base station allows the UE to access is carried on the AICH and the information indicating the TTI type used by the UE is received and carried on the idle chip of the above-mentioned one AICH transmission access slot. The aforementioned idle chips may be unused 1024chBP20110510s in the AICH, which actually contain 8 bits of length information, and the aforementioned 8 bits may be generated through a Hadamard matrix. In this embodiment, a more detailed description will be given of carrying the information indicating the TTI type used by the UE on the idle chips.

If the above-mentioned first message is a notification message, the above-mentioned second message carries information that allows the above-mentioned UE to access and indicates the TTI type used by the UE, including: if the second message from the base station is monitored on the AICH, determine that the base station allows the UE to access and Indicates the TTI type used by the UE, and the TTI type indicated above for the UE is the same as the TTI type carried in the notification message.

For example, if the above-mentioned first message is a request message, the information carried by the base station to allow UE access is received on an AICH and the information indicating the TTI type used by the UE is received on a free chip of the above-mentioned AICH transmission access slot Including: receiving coded and generated idle chips on an AICH transmission access slot, the signature carried by the above idle chips indicates the information that the base station allows the UE to access and the TTI type used by the UE; or, if the above first message is Notification message, listening to the second message from the base station on the AICH, confirming that the base station allows the UE to access and indicating the TTI type used by the UE. For the second message from the base station, if the received second message carries the information that the base station allows the UE to access, the second message can be an acknowledgment response ACK at this time to determine the type of TTI that the base station indicates to the UE. The type is the same as the TTI type carried in the notification message above.

104: If the access is allowed, perform data transmission according to the TTI type indicated by the second message to be used by the UE.

It can be understood that if the access is not allowed, the UE's access operation will fail, and this process can also end. It can be understood that: after the access fails, the UE can still access again, and then the process of this solution will be executed again.

From the above technical solutions, it can be seen that without introducing new scrambling codes and new resource lists, the system resource occupancy rate is reduced. TTI resources are designated by the base station to avoid the problem of low utilization of network resources caused by fixed allocation, thereby improving network resources. utilization rate.

The following embodiment will give a detailed description of using an AICH to send 1024chips in the access slot, including 8bit information, to transmit the instruction to change the TTI type:

First, establish the mapping relationship between the physical random access channel access preamble signature (PRACH preamble signature) and each idle bit, where the 7 bits corresponding to the PRACH preamble signature mapping are used to indicate whether the TTI type changes in the AI scenario, reserved 1 bit is used to indicate whether the TTI type changes in the enhanced AI (EAI) scenario;

After receiving the PRACH preamble signature from the terminal, the network side determines whether the default E-DCH resource corresponding to the PRACH preamble signature has been allocated to other UEs. If the default E-DCH resource corresponding to the PRACH preamble signature has not been allocated to other UEs, the NodeB then Resource allocation is performed according to the existing technology, that is, the default E-DCH resource corresponding to the PRACH preamble signature is assigned to the UE (the AI of the AICH channel is set to 1), and it is determined whether the TTI needs to be changed according to the value of the bit corresponding to the PRACH preamble signature mapping Type; if the default E-DCH resource corresponding to this PRACH preamble signature has been used, and the AICH information is configured with EAI, then it is determined whether the TTI type needs to be changed according to the value of the above reserved 1 bit.

It should be noted that the above reserved bit may be the 8th bit, and other bits may also be used, which is not limited in this embodiment of the present invention.

The corresponding relationship between Acquisition Indication (AI) and signature is as follows:

AI=1, use the default resource corresponding to AI;

The relationship between AI and the default E-DCH resource index X: X＝SigInd mod Y;

X: Default E-DCH resource index;

Y: the number of E-DCH resources configured by the enhanced random access channel (Enhanced Random Access Channel, eRACH);

Access the preamble SigInd: use the Nth PRACH preamble signature corresponding to eRACH, and start counting from 0.

According to the above-mentioned relationship between AI and the default E-DCH resource index X, the PRACH preamble signature can be mapped to 8 bits in an AICH transmission access slot, that is, the nth PRACH preamble signature and an AICH transmission access time slot can be mapped. The first bit in the incoming time slot is mapped, and so on, the n+7th PRACH preamble signature is mapped with the seventh bit in an AICH transmission access slot (it should be noted that: the mapping relationship here It is mapped incrementally according to the order of the signature, and other mapping methods are also possible. For example, the nth PRACH preamble signature is mapped to the first bit in an AICH transmission access slot, and the n+7th PRACH preamble signature is mapped to a The second bit in the AICH transmission access slot is used for mapping. The purpose of the mapping is to ensure that the UE and the network side can determine which bit in the 8 bits in an AICH transmission access slot corresponds to the preamble signature, so that It is convenient for the Node B to set the value of the bit in this AICH transmission access slot, and the UE can obtain the value by demodulating the bit in the corresponding AICH transmission access slot and confirm whether the TTI type needs to be changed). The mapping between Signature and AICH bits in one AICH transmission access slot uses 7 bits, and one bit in the last AICH transmission access slot is used to indicate the TTI change when the enhanced AI (EAI) is configured.

When the network side receives the PRACH preamble signature of the UE, if the default E-DCH resource corresponding to the PRACH preamble signature has not been allocated to other UEs, then the network side sets AI=1 to allocate E-DCH resources according to the existing method For the UE, at the same time, the Node B determines whether the bit in an AICH transmission access slot with the mapping relationship established above is 0 or 1 according to the position of the bit mapping between the PRACH preamble signature and an AICH transmission access slot, and 0 can be used Indicates that the UE changes the TTI, 1 indicates that the UE does not need to change the TTI type, and vice versa. According to the mapping relationship between the PRACH preamble signature and the bit in an AICH transmission access slot, the UE reads the value (0 or 1) on the corresponding bit of the AICH channel, so as to judge whether the Node B requires the UE to change the TTI type.

When the default resource with AI=1 has been configured, and the AICH is configured with EAI, the network side uses the seventh bit to indicate the UE TTI type change.

As shown in Figure 2, a mapping method is given:

The relationship between AI and the default E-DCH resource index X: X＝SigInd mod Y

X: default E-DCH resource index;

Y: the number of E-DCH resources configured by eRACH;

SigInd: Use the Nth PRACH preamble signature corresponding to eRACH, and start counting from 0;

In Figure 2, the mapping relationship between the bits in an AICH transmission access slot and the PRACH preamble signature is as follows: the N-N+7 PRACH preamble signatures are mapped to the bits in the 0-6th AICH transmission access slot in turn . The bit in the seventh AICH transmission access slot is used to indicate whether the TTI type changes in the EAI scenario.

The following embodiment will give a detailed description of another method for sending 1024chips in an access slot using an AICH, including 8bit information, to transmit an indication to change the TTI type:

Firstly, the mapping relationship between the physical random access channel access preamble signature (PRACH preamble signature) and the signature sequence carried by the idle chip in the AICH transmission access slot is established. Taking 1024chips to carry 8 signature sequences with a length of 8 bits as an example, the signature sequences are shown in Table 2, and there is a mapping relationship between the 8 signature sequences and at least 8 PRACH preamble signatures.

The eight signature sequences may have different values, which may be called EEAI (Enhanced Extended Acquisition Indicator), including +1 and -1.

After receiving the PRACH preamble signature from the terminal, the network side responds and allocates resources according to the prior art method, according to the signature sequence mapped to the PRACH preamble signature carried by 1024chips in the AICH transmission access slot Determine the TTI type. The EEAI of the signature carried by the 1024chips in the access slot is sent through the AICH to determine the TTI type. There is no limitation, and the following methods can be included:

1. If the signature is carried and its EEAI is +1, it means that the UE is instructed to use 2ms TTI; if the EEAI is -1, it means that the UE is instructed to use 10ms TTI, and vice versa; if the signature is not carried, it means that the UE is instructed to use The requested TTI type.

2. If the signature is carried, no matter whether its EEAI is +1 or -1, it indicates that the UE is instructed to use the 10ms TTI; if the signature is not carried, it indicates that the UE is instructed to use the requested TTI type.

3. If the signature is carried, no matter whether its EEAI is +1 or -1, it indicates that the UE is instructed to use the 2ms TTI; if the signature is not carried, it indicates that the UE is instructed to use the requested TTI type.

4. If the signature is carried, whether its EEAI is +1 or -1, it indicates that the UE is instructed to change the TTI type, that is, to use a TTI type different from the requested TTI type; if the signature is not carried, it indicates that the UE is instructed to use The requested TTI type.

Wherein, this embodiment does not limit the number of chips used to send the TTI type indication information by using the AICH to send idle chips in the access slot, which may be 1024 chips or 512 chips. Taking 512chips as an example, it can carry 4 signature sequences with a length of 4 bits.

The embodiment of the present invention also provides another data transmission method, and the solution of this embodiment is implemented in a base station, as shown in FIG. 3 .

201: The base station receives the first message sent by the UE during the access process; the first message carries the transmission time interval TTI type of the Common E-DCH to be used by the UE.

In another embodiment of the present invention, in the above 201, the network access may be in the cell forward access channel CELL_FACH state, of course, it may also be in other network access states. be limited.

In another embodiment of the present invention, in the above-mentioned 201, the above-mentioned first message carrying the TTI type of the Common E-DCH to be used by the UE includes: receiving an access preamble, and the signature carried by the above-mentioned access preamble corresponds to the above-mentioned TTI type ; Or, the scrambling code used for scrambling the above access preamble corresponds to the above TTI type and AICH.

The above-mentioned TTI type indicated by the UE is sent through an AICH; the above-mentioned TTI type indicated by the UE is carried in an idle chip of an AICH transmission access slot including: an idle chip generated by encoding on an AICH transmission access slot , the signature carried by the above idle chip indicates the TTI type.

202: Determine whether to allow the above-mentioned UE to access and allow the above-mentioned UE to perform a TTI type used for data transmission.

The above TTI type allowed to be used by the UE may be determined according to the TTI type of the Common E-DCH to be used by the UE.

203: Send a second message to the above-mentioned UE, where the above-mentioned second message carries information that the above-mentioned UE is not allowed to access, or, the second message carries information that the above-mentioned UE is allowed to access and information that indicates the TTI type used by the UE.

In another embodiment of the present invention, in the above-mentioned 203, if the above-mentioned first message is a request message, and the request message carries the TTI type of the Common E-DCH to be used by the above-mentioned UE, then the above-mentioned second message carries the TTI used by the UE The type includes: selecting an AICH from at least two AICHs to send a second message, each AICH in the at least two AICHs corresponds to a different TTI type, and the second message carries information indicating the TTI type used by the UE; or, A second message is sent on an idle chip on an AICH transmission access slot, and the second message carries information indicating the TTI type used by the UE; if the first message is a notification message, the second message carries information indicating the TTI type used by the UE. The TTI type includes: sending a second message on an AICH, and the above-mentioned TTI type indicated to the UE is the same as the TTI type carried in the above-mentioned notification message.

In another embodiment of the present invention, the above-mentioned signature or scrambling code corresponding to the TTI has been configured before the implementation of this embodiment, and the specific configuration can be performed by the network device. The specific configuration execution subject and process are not described in the embodiment of the present invention. be limited.

From the above technical solutions, it can be seen that without introducing new scrambling codes and new resource lists, the system resource occupancy rate is reduced. TTI resources are designated by the base station to avoid the problem of low utilization of network resources caused by fixed allocation, thereby improving network resources. utilization rate.

The following five examples will be given to further illustrate the data transmission methods implemented by the UE and the base station above. The TTI is 2ms and 10ms as examples. It can be understood that 2ms and 10ms are only examples of TTI. In actual application, the TTI The optional quantity and the value of the TTI are not limited to the above example, so it should not be construed as a limitation to the embodiment of the present invention. The NodeB indicates the TTI type used by the commonE-DCH resource, and when the UE has a large power headroom, the uplink data rate is increased; when the UE has only a small power headroom, the coverage performance is improved.

an example

In this example, the known signature set is divided into two signature subsets, corresponding to whether the commonE-DCH uses 2ms or 10ms TTI. The signature set can be a signature set applied to the CELL_FACH state. In theory, the signature set can be divided into two signature subsets in any proportion. The corresponding relationship between the signature subset and the TTI used by common E-DCH has been configured in the network before UE network access, and stored in UE and NodeB. The signature subset can be a resource list saved by both UE and NodeB. In this way, UE Use one of the signatures to apply for access resources, and the NodeB knows the TTI type that the UE will apply for.

1A: The UE determines which TTI type to use for its common E-DCH to send by evaluating a certain parameter, such as: power headroom. The UE sends a request to use the TTI type determined above to the NodeB on the access preamble. For example, the UE randomly selects a signature from the signature subset corresponding to the requested TTI type, and sends the information of the selected signature to the NodeB; the sending method adopts sending The access preamble carries a signature.

1B: NodeB receives the information of the above determined TTI type. If the access is successful, it will feed back an acknowledgment (Acknowledge, ACK) through the AICH and at the same time send an indication message to the UE through the AICH, instructing the UE to use the common E-DCH TTI type ; The second message can be carried in an idle chip of an AICH transmission access slot, and the encoding method of the above idle chip can be shown in Table 1 below, where s"=0 can indicate that the NodeB instructs the UE to use the 2ms TTI type, s"=1 means NodeB instructs UE to use 10ms TTI type; vice versa. If the access is unsuccessful, a non-acknowledgment (Not Acknowledge, NACK) is still fed back. There may be many factors that affect whether the base station allows UE access and instructs the UE to use TTI type, because random access resources are based on contention, even if there are resources, the base station may also comprehensively consider the interference level of the current cell, network congestion status and other factors judge.

Table 1

1C: If the UE receives NACK, the random access process ends; if the UE receives ACK, the UE sends a signature indicating the TTI type to the NodeB in the idle chip of the access slot according to an AICH, and obtains the common E-DCH to use Whether it is the indication information sent by 2ms or 10ms TTI.

The second example, the difference between this example and example one is that the above 1B is modified to 2B of this example, specifically:

2B: NodeB receives the information of the TTI type determined by the UE. If the access is successful, it will feed back ACK through the AICH and at the same time send indication information to the UE through the AICH, indicating the commonE-DCH TTI type used by the UE. The second message can carry In the idle chips generated by the Hadamard matrix, the encoding method of the above idle chips can be shown in Table 2 below, where s"=0 indicates that the base station instructs the UE to use the 2ms TTI type, and s"=1 It means that the NodeB instructs the UE to use the 10ms TTI type. If the access is unsuccessful, NACK may be fed back.

Table 2

In the above two examples, there is no need to introduce a new scrambling code and a new common E-DCH resource list, thus reducing the system resource occupancy rate; in addition, TTI resources are specified by the base station, which avoids the low utilization rate of network resources caused by fixed allocation problems, thereby improving the utilization of network resources.

Three examples, this example is the same as the above-mentioned example 1 and example 2 in that the initial settings are the same, and the specific execution process is as follows:

3A: The UE determines which TTI type to use for its common E-DCH to send by evaluating a certain parameter, such as: power headroom. Then the UE sends information requesting to use the above-determined TTI type to the NodeB on the access preamble, for example: UE randomly selects a signature from the signature subset corresponding to the requested TTI type, and sends the information of the selected signature to the NodeB, the sending method It is carried out by sending an access preamble carrying a signature.

Then the UE monitors the second message from the base station on the two AICHs, and the two AICHs can be named AICH1 and AICH2 respectively. The way to determine the monitoring channel can be: after the user joins the network, the network will configure some channel information for the user, such as channelization codes, etc. If the user wants to monitor two AICHs, the network will inform the UE of the available two AICHs. information.

3B: NodeB receives the information of the above determined TTI type. If the access is successful, NodeB selects one of the two AICHs monitored by the user equipment to send ACK to the user equipment. At the same time, the two AICHs correspond to different TTIs. It can be understood that the format of the AICH time slot does not need to be changed at this time, and the way of sending messages through the AICH can be the same as that in the prior art. If the access is unsuccessful, NACK is still fed back.

3C: If the UE receives NACK, the random access process ends; if it receives ACK, it can access. In this solution, whether the common E-DCH uses 2ms or 10ms TTI acquisition method can be determined by the received The AICH determination of the second message, for example: if ACK is received in AICH1, it can be determined that NodeB instructs UE to use 2ms TTI type; if ACK is received in AICH2, it can be determined that NodeB instructs UE to use 10ms TTI type; vice versa .

In this example, on the basis of examples 1 and 2, which reduce the system resource occupancy rate and improve the network resource utilization rate, the solution of using two AICH channels is relatively simple to implement.

Four examples. In this example, a new common scrambling code and a dedicated scrambling code corresponding to the UE itself can be introduced, corresponding to whether the common E-DCH uses 2ms or 10ms TTI. Here, the correspondence between scrambling codes and TTIs has been configured in the network before the UE accesses the network, and stored in the UE and the NodeB, and each scrambling code corresponds to the AICH. When the UE accesses the network, the network will assign two scrambling codes to the UE. The above two scrambling codes come from the CELL_FACH public scrambling codes respectively. In this way, the UE uses one of the scrambling codes to apply for access resources, and the NodeB also knows that the UE needs to What is the type of TTI applied for. The foregoing dedicated scrambling codes and public scrambling codes can be regarded as a set of preset scrambling codes. In this example, when the UE accesses the network, the network will assign two scrambling codes to the UE. The above two scrambling codes are from the CELL_FACH common code to apply for access resources, and the NodeB also knows what type of TTI the UE is to apply for. In the uplink, each UE has a dedicated scrambling code corresponding to it. In this embodiment, the network configures a new public scrambling code, and this public scrambling code can be used by all UEs in the cell. Therefore, each UE can select one of the two scrambling codes to send the request. For example, an application using its own scrambling code corresponds to a 10ms TTI, while an application using a common scrambling code corresponds to a 2ms TTI. The opposite is also possible. The specific implementation process can be:

4A: The UE determines which TTI type to use for its common E-DCH to send by evaluating a certain parameter, such as: power headroom. Then the UE sends the requested and determined TTI type information to the NodeB in the access preamble, for example: in the preset public scrambling code or the scrambling code corresponding to the above UE, the UE selects the scrambling code according to the corresponding relationship with the above TTI type code, and then send the access preamble scrambled with the selected scrambling code to the NodeB. Then the UE monitors the second message from the base station on the two AICHs, the two AICHs can be named AICH1 and AICH2 respectively, and the two scrambling codes are Scramble1 and Scramble2 respectively.

4B: NodeB receives the above determined TTI type information, if the access is successful, it will feed back ACK through AICH and at the same time instruct UE to use common E-DCH TTI type through AICH; AICH corresponds to the scrambling code in the above scrambling code subset Indicates that it indicates that the UE uses the common E-DCHTTI type. If the access is unsuccessful, NACK is still fed back on the AICH.

4C: If the UE receives NACK, the random access process ends; if it receives ACK, it can access. In this solution, whether the common E-DCH uses 2ms or 10ms TTI acquisition method can be determined by the received The AICH corresponding to the corresponding scrambling code is determined. Assume that Scramble_1 represents the application for 2ms TTI, and Scramble_2 represents the application for 10ms TTI; Scramble_1 corresponds to AICH1, and Scramble_2 corresponds to AICH2. If the UE receives the ACK in AICH1, it is determined that the NodeB instructs the UE to use the 2ms TTI type; if it receives the ACK of AICH2, it is determined that the NodeB instructs the UE to use the 10ms TTI type; vice versa.

Five examples, this example is similar to the previous four examples, but in this example, the UE only informs the NodeB of the TTI type used by its common E-DCH, and the NodeB only needs to feed back ACK or NACK on the AICH.

If the UE distinguishes the TTI type used by the common E-DCH by dividing the signature set in Examples 1 to 3, the implementation process is similar to Examples 1 to 3, the difference is that the third step is modified as follows:

If the UE receives NACK, the random access process ends; if it receives ACK, it can access. In this solution, the common E-DCH uses 2ms or 10ms TTI type, which is determined by the TTI type applied by the UE, namely: The TTI type used is consistent with the TTI type notified by the UE to the NodeB.

If the UE uses the two scrambling codes in Embodiment 3 to distinguish the TTI type used by the common E-DCH, a new common scrambling code and the dedicated scrambling code corresponding to the UE itself are introduced, corresponding to whether the common E-DCH uses 2ms or 10ms TTI. Here, the correspondence between scrambling codes and TTIs has been configured in the network before the UE accesses the network, and stored in the UE and the NodeB, and each scrambling code corresponds to the AICH. When the UE accesses the network, the network will assign two scrambling codes to the UE. The above two scrambling codes are from the CELL_FACH public scrambling code and the above-mentioned UE-specific scrambling code, so that the UE uses one of the scrambling codes to apply for access resources, and the NodeB also knows what type of TTI the UE will apply for. When the UE accesses the network, it selects a scrambling code corresponding to the TTI type of the CommonE-DCH to be used by the UE from the scrambling code set composed of the above two scrambling codes. The implementation process is similar to Example 4, except that the third The steps are changed to:

If the UE receives NACK, the random access process ends; if the UE receives ACK, it can access. In this solution, whether the common E-DCH uses 2ms or 10ms TTI type can be determined by scrambling code, because There is a corresponding relationship between the scrambling code and the TTI type. In this solution, the UE finally determines whether to use the 2ms or 10ms TTI type, which is consistent with the TTI type notified by the UE to the NodeB. Assume that Scramble_1 represents the application for 2ms TTI, and Scramble_2 represents the application for 10ms TTI; Scramble_1 corresponds to AICH1, and Scramble_2 corresponds to AICH2. If the UE receives the ACK in AICH1, it is determined that the NodeB instructs the UE to use the 2ms TTI type; if it receives the ACK of AICH2, it is determined that the NodeB instructs the UE to use the 10ms TTI type; vice versa.

The TTI resources in Example 4 are specified by the base station, and the TTI resources in Example 5 are specified by the UE, which avoids the problem of low utilization of network resources caused by fixed allocation, thereby improving the utilization of network resources.

In the above five examples, the NodeB indicates the TTI type used by the common E-DCH resource, when the UE has a large power headroom, the uplink data rate is increased; when the UE has a small power headroom, the coverage performance is improved.

A user equipment, as shown in FIG. 4 , includes: a TTI determining unit 301 , a first message sending unit 302 , a second message receiving unit 303 and a data transmission unit 304 .

The TTI determination unit 301 is configured to determine the transmission time interval TTI type of the common enhanced uplink dedicated channel Common E-DCH to be used by the user equipment UE.

The first message sending unit 302 is configured to send a first message to the base station during the access process; the first message carries the TTI type of the Common E-DCH to be used.

The second message receiving unit 303 is configured to receive a second message, where the second message carries information that the UE is not allowed to access, or the second message carries information that allows the UE to access and information that indicates the TTI type used by the UE ; The TTI type indicated above for the UE is determined by the base station according to the TTI type of the Common E-DCH to be used by the UE.

The data transmission unit 304 is configured to perform data transmission according to the TTI type used by the UE indicated by the second message if the second message carries information that the UE is allowed to access.

Optionally, as shown in FIG. 5 , the first message sending unit 302 includes: a request message sending unit 401 or a notification message receiving unit 402 .

The above-mentioned request message sending unit 401 is configured to send a request message, and the above-mentioned request message carries the TTI type of the above-mentioned Common E-DCH to be used.

The notification message receiving unit 402 is configured to send a notification message, and the notification message carries the TTI type of the Common E-DCH to be used.

Optionally, as shown in FIG. 6 , the request message sending unit 401 includes: a selecting unit 501 and a sending subunit 502 .

The selection unit 501 is configured to select a signature signature from a preset subset of signatures corresponding to the above TTI type; or select a scrambling code from a preset scrambling code set corresponding to the above TTI type, and the above scrambling code set Each scrambling code corresponds to the acquisition indication channel AICH.

For example: Divide the known scrambling code set into two scrambling code subsets, corresponding to whether the commonE-DCH uses 2ms or 10ms TTI; when the UE accesses the network, the network will assign two scrambling codes to the UE. The two scrambling codes are respectively from the above two scrambling code subsets.

The sending subunit 502 is configured to send the access preamble carrying the aforementioned signature to the base station; or, send the access preamble scrambled with the aforementioned scrambling code to the base station.

Optionally, as shown in FIG. 7 , the second message receiving unit 303 includes: a second receiving subunit 601 .

If the above-mentioned first message is a request message, the above-mentioned second receiving subunit 601 is configured to monitor the second message from the base station on at least two AICHs, and if the above-mentioned second message is received on one of the AICHs, determine that the base station allows the UE to Access and indicate the TTI type used by the UE. The AICH receiving the second message corresponds to the TTI type; or, receiving the information carried by the base station on an AICH that allows the UE to access and sending the access time slot in the above AICH The information indicating the TTI type used by the UE is received on the idle chip;

If the first message is a notification message, the second message receiving subunit 601 is configured to determine that the base station allows the UE to access and indicate the TTI type used by the UE if the second message from the base station is monitored on the AICH. The TTI type of is the same as the TTI type carried in the notification message above.

More specifically, the above-mentioned second receiving subunit 601 is configured to receive, on an AICH, the information carried by the base station that the UE is allowed to access, and to receive the TTI used by the UE on the idle chip of the above-mentioned AICH transmission access slot. The type information includes: receiving coded idle chips generated on an AICH transmission access slot, the signature carried by the above idle chips indicates information that the base station allows the UE to access and the TTI type used by the UE;

If the first message is a notification message, the second message receiving subunit 601 is specifically configured to monitor the second message from the base station on the AICH, determine that the base station allows the UE to access and indicate the TTI type used by the UE. The TTI type is the same as the TTI type carried in the above notification message, including: monitoring the second message from the base station on the AICH, and if the received second message carries the information that the base station allows the UE to access, determine the TTI type that the base station instructs the UE to use, The above-mentioned TTI type indicated to the UE to use is the same as the TTI type carried in the above-mentioned notification message.

The embodiment of the present invention also provides a base station, as shown in FIG. 8 , including: a first message receiving unit 701 , a determining unit 702 and a second message sending unit 703 .

The first message receiving unit 701 is configured to receive the first message sent by the UE during the access process; the first message carries the transmission time interval TTI type of the Common E-DCH to be used by the UE.

The determining unit 702 is configured to determine whether to allow the UE to access and to allow the UE to use the TTI type for data transmission; the TTI type allowed to be used by the UE is determined by the base station according to the TTI type of the Common E-DCH to be used by the UE.

The second message sending unit 703 is configured to send a second message to the above-mentioned UE, where the above-mentioned second message carries information that the above-mentioned UE is not allowed to access, or, the second message carries information that the above-mentioned UE is allowed to access and indicates the TTI used by the UE type of information.

Optionally, as shown in FIG. 9, if the above-mentioned first message is a request message, and the request message carries the TTI type of the Common E-DCH to be used by the above-mentioned UE; then the above-mentioned second message sending unit 703 includes: a second sending subunit 801 , for selecting an AICH from at least two AICHs to send a second message, where each of the at least two AICHs corresponds to a different TTI type, and the second message carries information indicating the TTI type used by the UE; or, A second message is sent on an idle chip in an AICH transmission access slot, where the second message carries information indicating the type of TTI used by the UE.

If the above-mentioned first message is a notification message, the above-mentioned second sending subunit 801 is configured to send a second message on the AICH, and the TTI type used by the above-mentioned instruction UE is the same as the TTI type carried in the above-mentioned notification message.

Optionally, as shown in FIG. 10 , the first message receiving unit 701 includes: an access preamble receiving unit 901 and a second message sending unit 703 .

The access preamble receiving unit 901 is configured to receive an access preamble, where the signature carried by the access preamble corresponds to the above TTI type; or, the scrambling code used for scrambling the access preamble corresponds to the above TTI type and AICH.

For example: Divide the known scrambling code set into two scrambling code subsets, corresponding to whether the commonE-DCH uses 2ms or 10ms TTI; when the UE accesses the network, the network will assign two scrambling codes to the UE. The two scrambling codes are respectively from the above two scrambling code subsets.

The second message sending unit includes 703: a second message sending subunit 902, configured to send an idle chip coded and generated on an access slot through an AICH, where the signature carried by the idle chip indicates a TTI type.

The embodiment of the present invention also provides a data transmission system, as shown in FIG. 11 , including: any one of the user equipment 1001 provided by the present invention and/or any one of the base station 1002 provided by the present invention.

From the above technical solutions, it can be seen that without introducing new scrambling codes and new resource lists, the system resource occupancy rate is reduced. TTI resources are designated by the base station to avoid the problem of low utilization of network resources caused by fixed allocation, thereby improving network resources. utilization rate.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc and other media that can store program codes.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (17)

1. A data transmission method, characterized in that, comprising: The user equipment UE determines the transmission time interval TTI type of the common enhanced uplink dedicated channel CommonE-DCH to be used by the UE; During the access process, a first message is sent to the base station; the first message carries the TTI type of the Common E-DCH to be used; Receive a second message from the base station; the second message carries information that the UE is not allowed to access, or, the second message carries information that allows the UE to access and information indicating the TTI type used by the UE; if allowed access, perform data transmission according to the TTI type indicated by the second message to be used by the UE. 2. The method according to claim 1, wherein the first message carries the TTI type of the Common E-DCH to be used and includes: The first message is a request message, and the request message carries the TTI type of the CommonE-DCH to be used; or, the first message is a notification message, and the notification message carries the CommonE-DCH to be used. TTI type of DCH. 3. The method according to claim 1, wherein the sending the first message to the base station comprises: Select a signature signature in the preset signature subset corresponding to the TTI type of the Common E-DCH to be used, and send the access preamble carrying the signature to the base station; or, in the preset and the required Select a scrambling code from the scrambling code set corresponding to the TTI type of the Common E-DCH used, and send the access preamble scrambled with the scrambling code to the base station, and the scrambling code corresponds to the acquisition indication channel AICH. 4. method according to claim 2, is characterized in that, If the first message is a request message, the second message carrying information allowing the UE to access and indicating the TTI type used by the UE includes: monitoring the second message from the base station on at least two AICHs, if Receive the second message on one of the AICHs, determine that the base station allows the UE to access and indicate the TTI type used by the UE, and the AICH on which the second message is received corresponds to the TTI type; or, receive the carried on one AICH The information that the base station allows the UE to access and the information indicating the TTI type used by the UE received on the idle chip of the AICH transmission access slot; or If the first message is a notification message, the second message carrying the information allowing the UE to access and indicating the TTI type used by the UE includes: if the second message from the base station is monitored on the AICH, determine that the base station allows the UE Access and indicate the TTI type used by the UE, where the TTI type indicated by the UE is the same as the TTI type carried in the notification message. 5. The method according to claim 4, wherein, if the first message is a request message, the information that the base station allows UE access carried by the receiving station on one AICH and when the one AICH sends access The information indicating the TTI type used by the UE received on the idle chips of the slot includes: Receive an idle chip generated by encoding on an AICH transmission access slot, and the signature carried by the idle chip indicates the information that the base station allows the UE to access and the TTI type used by the UE; or, If the first message is a notification message, listen to the second message from the base station on the AICH, determine that the base station allows the UE to access and indicate the TTI type used by the UE, and the TTI type indicated by the UE is the same as that carried in the notification message. The same TTI type includes: monitoring the second message from the base station on the AICH, if the received second message carries the information that the base station allows the UE to access, determine the TTI type that the base station instructs the UE to use, and the TTI type that indicates the UE uses It is the same as the TTI type carried in the notification message. 6. A data transmission method, characterized in that, comprising: The base station receives the first message sent by the UE during the access process; the first message carries the transmission time interval TTI type of the Common E-DCH to be used by the UE; Determine whether to allow the UE to access and allow the UE to perform data transmission using the TTI type; Sending a second message to the UE, where the second message carries information that the UE is not allowed to access, or, the second message carries information that the UE is allowed to access and information that indicates the TTI type used by the UE. 7. The method according to claim 6, wherein if the first message is a request message, the request message carries the TTI type of the Common E-DCH to be used by the UE, and the second message carries the TTI type indicating the UE The TTI types used include: Selecting an AICH from at least two AICHs to send a second message, where each AICH in the at least two AICHs corresponds to a different TTI type, and the second message carries information indicating the TTI type used by the UE; or, in An AICH sends a second message on an idle chip on the access slot, and the second message carries information indicating the TTI type used by the UE; or If the first message is a notification message, carrying the TTI type indicated by the UE in the second message includes: sending a second message on the AICH, the TTI type indicated by the UE is the same as the TTI type carried in the notification message . 8. method according to claim 7, is characterized in that, The first message carrying the TTI type of the Common E-DCH to be used by the UE includes: receiving an access preamble, the signature carried by the access preamble corresponds to the TTI type; or, the access preamble is scrambled The scrambling code used corresponds to the TTI type and AICH; The sending of the TTI type indicated by the UE through an AICH; the carrying of the TTI type used by the UE in an idle chip of an AICH transmission access slot includes: generated by coding on an AICH transmission access slot An idle chip, where the signature carried by the idle chip indicates the TTI type. 9. A user equipment, characterized in that, comprising: The TTI determination unit is used to determine the transmission time interval TTI type of the public enhanced uplink dedicated channel Common E-DCH to be used by the user equipment UE The first message sending unit is configured to send a first message to the base station during the access process; the first message carries the TTI type of the Common E-DCH to be used; The second message receiving unit is configured to receive a second message, the second message carries information that the UE is not allowed to access, or the second message carries information that the UE is allowed to access and indicates the TTI type used by the UE Information; The data transmission unit is configured to perform data transmission according to the TTI type used by the UE indicated by the second message if the second message carries information that the UE is allowed to access. 10. The user equipment according to claim 9, wherein the first message sending unit comprises: a request message sending unit or a notification message receiving unit; The request message sending unit is used to send a request message, and the request message carries the TTI type of the Common E-DCH to be used; The notification message receiving unit is configured to send a notification message, and the notification message carries the TTI type of the Common E-DCH to be used. 11. The user equipment according to claim 10, wherein the request message sending unit comprises: A selection unit, configured to select a signature signature from a preset subset of signatures corresponding to the TTI type; or, select a scrambling code from a preset scrambling code set corresponding to the TTI type, the scrambling code Each scrambling code in the set corresponds to AICH; The sending subunit is configured to send the access preamble carrying the signature to the base station; or send the access preamble scrambled with the scrambling code to the base station. 12. The user equipment according to claim 10, wherein the second message receiving unit comprises: a second receiving subunit; If the first message is a request message, the second receiving subunit is configured to monitor the second message from the base station on at least two AICHs, and if the second message is received on one of the AICHs, determine the base station Allowing the UE to access and indicating the TTI type used by the UE, the AICH receiving the second message corresponds to the TTI type; or receiving the information carried by the base station on an AICH that allows the UE to access and sending the message on the AICH The information indicating the TTI type used by the UE is received on the idle chip of the incoming slot; If the first message is a notification message, the second message receiving subunit is configured to determine that the base station allows the UE to access and indicate the TTI type used by the UE if the second message from the base station is monitored on the AICH. The TTI type used is the same as the TTI type carried in the notification message. 13. The user equipment according to claim 12, characterized in that, The second receiving subunit is configured to receive the information carried by the base station allowing the UE to access on an AICH and receive the information indicating the TTI type used by the UE carried on a free chip of the AICH transmission access slot Including: receiving coded idle chips generated on an AICH transmission access slot, the signature carried by the idle chips indicates information that the base station allows the UE to access and the TTI type used by the UE; If the first message is a notification message, the second message receiving subunit is specifically configured to monitor the second message from the base station on the AICH, determine that the base station allows the UE to access and indicate the TTI type used by the UE, and the indication UE The TTI type used is the same as the TTI type carried in the notification message includes: monitoring the second message from the base station on the AICH, and if the received second message carries information that the base station allows the UE to access, determine the TTI that the base station instructs the UE to use Type, indicating that the TTI type used by the UE is the same as the TTI type carried in the notification message. 14. A base station, characterized in that it comprises: The first message receiving unit is configured to receive the first message sent by the UE during the access process; the first message carries the transmission time interval TTI type of the Common E-DCH to be used by the UE; A determining unit, configured to determine whether to allow the UE to access and to allow the UE to perform data transmission using the TTI type; The second message sending unit is configured to send a second message to the UE, the second message carrying information that the UE is not allowed to access, or the second message carrying information that the UE is allowed to access and instructing the UE Information about the type of TTI used. 15. The base station according to claim 13, wherein if the first message is a request message, the request message carries the TTI type of the Common E-DCH to be used by the UE; the second message sending unit includes : The second sending subunit is configured to select an AICH from at least two AICHs to send a second message, each of the AICHs in the at least two AICHs corresponds to a different TTI type, and the second message carries the TTI used by the UE TTI type information; or, sending a second message on an idle chip on an AICH transmission access slot, where the second message carries information indicating the TTI type used by the UE; If the first message is a notification message, the second sending subunit is configured to send a second message on the AICH, and the TTI type used by the UE is the same as the TTI type carried in the notification message. 16. The base station according to claim 15, wherein the first message receiving unit comprises: An access preamble receiving unit, configured to receive an access preamble, where the signature carried by the access preamble corresponds to the TTI type; or, the scrambling code used for scrambling the access preamble corresponds to the TTI type and the AICH; The second message sending unit includes: a second message sending subunit, configured to send an idle chip coded and generated on an access slot through an AICH, where the signature carried by the idle chip indicates a TTI type. 17. A data transmission system, comprising: The user equipment according to any one of claims 9-13 and/or the base station according to any one of claims 14-16.

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