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A method and device for enhancing random access

A random access and physical random access technology, applied in the field of communication, can solve the problems of high collision probability, loss of uplink synchronization, and the existing technical solutions are not suitable for direct use of TD-SCDMA systems, so as to reduce collision probability and resource allocation. flexible effects

Inactive Publication Date: 2008-02-13
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

[0013] However, the above-mentioned existing technical solutions for realizing enhanced random access are not suitable for direct use in TD-SCDMA systems
TD-SCDMA is a strictly synchronous system. If the UE is not used for a long time and is invoked, it may lose uplink synchronization. Therefore, sending E-RUCCH messages directly cannot guarantee correct reception by NodeB, and may also cause interference to data in other time slots.
In addition, the collision probability of E-RUCCH or PRACH of different UEs is relatively high

Method used

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  • A method and device for enhancing random access
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  • A method and device for enhancing random access

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Embodiment Construction

[0045] The present invention will be further described below by taking the TD-SCDMA system as an example. In a system using HSUPA, the UE sends access requests to the system at random, that is to say, the Node B does not know when the UE will send data. In addition, the random access request sent by the UE to the system may be a normal random access request or an enhanced random access request. To this end, the present invention proposes a new solution. When a terminal sends an enhanced random access request to the system, the system can use a process similar to ordinary random access to perform corresponding processing, thereby avoiding collisions.

[0046]Next, with reference to Figure 4 and Figure 5, the processing process of the terminal sending an enhanced random access request to the system is described in detail, as follows:

[0047] Step 501: UE sends uplink pilot code to Node B;

[0048] Step 502: Node B detects and receives the uplink pilot code sent by UE;

[004...

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Abstract

The invention provides a method to randomly access reinforced data, which comprises the following steps. Upstream pilot frequency codes transmitted by a terminal are detected and received; and information is fed back to the terminal. Reinforced data access request is transmitted by a receiving terminal; after that upstream reinforced data are allowed to be transmitted by the terminal is determined, configuration information, such as the information about physical resources and power, is transmitted to the terminal; the upstream reinforced data are received. The invention also provides a device to randomly access reinforced data. The device is detected by a processing unit, and receives upstream pilot frequency code sequence transmitted by a terminal. Reinforced data access request and reinforced data transmitted by the terminal are received. An information transmitting unit transmits feedback information to the terminal. When that the terminal is allowed to transmit reinforced data is determined, configuration information, such as the information about physical resources and power and so on, is transmitted to the terminal. A decoding processing unit decodes the reinforced data access request, and determines whether the terminal is allowed to transmit the reinforced data. The invention can ensure that the information of random access request of reinforced data can be received by a base station correctly; and the collision probability of E-RUCCH or PRACH of different terminals is reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular to an enhanced random access method and device. Background technique [0002] In the third-generation mobile communication system Time-Division Synchronization Code Division-Multiple-Access (TD-SCDMA, Time-Division Synchronization Code Division-Multiple-Access) system, the process of mobile terminal equipment (UE, User Equipment) accessing the system is similar to that of the second-generation GSM The system is similar, but due to the special requirements of the system for synchronization performance, the process of uplink synchronization is specially added in the random access process. [0003] TD-SCDMA wireless frame subframe structure, in a subframe, there are uplink and downlink time slots at the same time, a total of 7. Except that time slot Ts0 must be used for downlink and time slot Ts1 must be used for uplink, the directions of other time slots can be changed. DwPTS (down...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04B7/005H04Q7/30H04Q7/32H04J13/02H04W74/08
Inventor 周海军胡金玲
Owner CHINA ACAD OF TELECOMM TECH
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