A system frame number update method and system

A system frame number and update method technology, which is applied in network data management, network flow/resource management, electrical components, etc., can solve problems such as difficult guarantees, achieve accurate and reliable updates, and ensure system stability.

Inactive Publication Date: 2015-10-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the SFN is increasing over time, and the delay between when the DeNB sends the signaling and when the RN receives the signaling is uncertain, it is difficult to ensure that the SFN in the RN receives the signaling The value is consistent with the real DeNB cell SFN

Method used

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  • A system frame number update method and system
  • A system frame number update method and system
  • A system frame number update method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] After the DeNB and RN are synchronized, the SFNs of the two correspond to the same. When the SFN on the DeNB side jumps, it will send the changed offset value and flag to the RN through RRC dedicated signaling. When the RN receives the signaling in a certain radio frame, it will reply to the DeNB to confirm and update the SFN= Original SFN+offset value, the change result is displayed in the next wireless frame (in the embodiment, SFN is described in decimal value).

[0050] The flag bit Flag is an optional cell with a length of 2 bits included in the RRC dedicated signaling. Flag=00 means that the positive deviation value of the SFN jump is sent; Flag=01 means that the negative deviation value of the SFN jump is sent ; Flag=10 means that the 8 high-order absolute values ​​of the SFN are sent; Flag=11 means that the complete 10-bit absolute value of the SFN is sent.

[0051] figure 2 It is a schematic flow chart of the system frame number update method in Embodiment 1...

Embodiment 2

[0058] This embodiment is similar to Embodiment 1, except that the change amount in this example is a negative value, and the corresponding flag bit is changed. image 3 It is a schematic flow chart of the method for updating the frame number of the system in Embodiment 2 of the present invention, as image 3 As shown, the method includes:

[0059] Step 301: DeNB and RN are always synchronized. When the SFN of the two radio frames=549, the SFN of the next radio frame should be incremented to 550 in time sequence, but the SFN of the DeNB side jumps to 300.

[0060] Step 302: When the SFN on the DeNB side jumps, it will pass the relative deviation Value before and after the jump Value=300-550=-250, and the flag Flag=01 (indicating that the negative relative value of SFN is sent) through the RRC SI The Update signaling is transmitted to the RN.

[0061] Step 303: After successfully receiving the RRC signaling, the RN replies an ACK to the DeNB. After receiving the ACK, the DeNB...

Embodiment 3

[0064] This embodiment transmits the absolute value of SFN. As mentioned above, the 2 least significant bits of the SFN of each radio frame can be obtained by sequentially increasing the radio frame bits in sequence. If the 8 high bits of the SFN on the DeNB side jump at a certain moment, based on the HARQ mechanism and its Sequence HARQ RTT Time=8ms, DeNB may be able to know the time when the transmission signaling arrives at the RN (the DeNB side knows the number of retransmissions), and it indicates that the RN should update when receiving the signaling when sending the RRC dedicated signaling value.

[0065] After receiving the RRC dedicated signaling in a radio frame, the RN will reply to the DeNB for confirmation, and will display the updated result in the next radio frame, where SFN RN The 8 high bits of the SFN are updated according to the received value, and the 2 low bits are still counted up by 1 according to the timing, then the complete SFN and DeNB are resynchro...

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Abstract

Disclosed is a method for updating a system frame number (SFN), comprising: when the system frame number of a DeNB hops, the DeNB sending the difference in values before and after the SFN hops or the SFN value after the hop to a relay node (RN) via a radio resource control (RRC) dedicated signalling and setting it as an SFN update of the RN. Accordingly disclosed is an SFN updating system. By way of the present invention, the SFN can be updated by the RN accurately and reliably and the system stability can be ensured.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a system frame number (System Frame Number, SFN) updating method and system. Background technique [0002] In order to meet the increasing demand for large bandwidth and high-speed mobile access, the Third Generation Partnership Projects (Third Generation Partnership Projects, 3GPP) launched the Long-Term Evolution advanced (LTE-Advanced) standard. LTE-Advanced retains the core of LTE for the evolution of Long-Term Evolution (LTE), and uses a series of technologies to expand the frequency domain and air domain on this basis to improve spectrum utilization and increase system capacity etc. purpose. [0003] Wireless relay (Wireless Relay) technology is one of the technologies in LTE-Advanced. ) transmit power. figure 1 It is a schematic diagram of the network structure using wireless relay technology, such as figure 1 As shown, some relay nodes (Relay No...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04W8/08H04W92/04
CPCH04W28/06H04W84/047
Inventor王昕王冠宙陈思
OwnerZTE CORP