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Feedback method of resources of high-speed physical downlink shared channel

A physical downlink and shared channel technology, applied in wireless communication, communication between multiple stations, electrical components, etc., can solve problems such as waste of resources, interference, difficult uplink synchronization operation of UE, etc., to ensure correct reception , to avoid the effect of wasting resources

Inactive Publication Date: 2009-12-02
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the UE is in the uplink out-of-sync state at this time, and the HS-SICH and HS-PDSCH have a relatively fixed timing relationship (after receiving the HS-PDSCH, the UE can only use the HS-SICH channel paired with the HS-SCCH at a fixed time point feedback reception status), it is difficult for the UE to complete the uplink synchronization operation before the HS-SICH transmission time is reached
If the UE rushes to use the HS-SICH for feedback before the uplink synchronization is completed, it will not only be difficult to ensure the correct reception of the feedback information by the NodeB, but also cause greater interference to other users on the same slot
Therefore, UE can only choose to give up HS-SICH feedback
On the other hand, if the UE gives up the feedback on the HS-PDSCH transmission status, the NodeB cannot know whether the transmission is successful or not, and can only choose to retransmit blindly, which may cause unnecessary waste of resources

Method used

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  • Feedback method of resources of high-speed physical downlink shared channel
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  • Feedback method of resources of high-speed physical downlink shared channel

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Embodiment Construction

[0029] The present invention provides a feedback method for HS-PDSCH resources. After the UE receives the HS-PDSCH resources sent by the NodeB, before the HS-SICH feedback time arrives, if the UE is still in the uplink out-of-sync state, the uplink synchronization Then use the E-RUCCH to feed back the receiving situation of the HS-PDSCH resource this time.

[0030] This embodiment provides a feedback method for HS-PDSCH resources, such as image 3 shown, including the following steps:

[0031] Step 301. When the NodeB detects that there is downlink data of the UE that needs to be sent, it sends the HS-SCCH to schedule the UE to receive data using the HS-PDSCH resources specified by the NodeB, and prepares to receive the HS-SICH at the HS-SICH time corresponding to the HS-SCCH. SICH feedback information;

[0032] Step 302, after the UE receives the HS-SCCH, it judges that the HRNTI (High Speed-Radio Network Temporary Identity) carried in the HS-SCCH is the same as its own, th...

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Abstract

The invention provides a feedback method of the resources of a high-speed physical downlink shared channel, comprising the following steps: after user equipment receives the resources of the high-speed physical downlink shared channel, which are sent by a base station and before the feedback time of a high-speed shared information channel, if the user equipment is in an uplink step-out state, the user equipment gives up the use of the high-speed shared information channel to carry out feedback, and after the uplink synchronization is carried out, the user equipment uses an enhanced uplink random access channel to feed back the receiving conditions of the resources of the high-speed physical downlink shared channel to the base station. The technical scheme of the invention avoids the resource waste caused by that the base station can not receive the feedback information to carry out blind retransmission and can also ensure that the base station can correctly receive the feedback information.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for feeding back resource reception of HS-PDSCH (High-Speed ​​Physical Downlink Shared Channel: High-Speed ​​Physical Downlink Shared Channel). Background technique [0002] TD-SCDMA (Time Division Synchronous Code Division Multiple Access) system, as a synchronous CDMA (Code Division Multiple Access) system, has very high requirements for uplink synchronization. If the UE (user equipment) transmits when the uplink is out of sync, it will not only cause the information it sends cannot be correctly received by the base station, but also cause strong interference to other users, which makes the UE transmit other than the uplink synchronization code. Before signaling, it needs to ensure that it is in the uplink synchronization state. [0003] After the introduction of HSPA+ (Evolution of High Speed ​​Packet Access), UE can use HS-DSCH (High Speed ​​Downlink Sh...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04B7/26
Inventor 黄河
Owner ZTE CORP
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