Truy nhập gói đường xuống tốc độ cao - HSDPA

7/31/2019 Truy nhp gi ng xung tc cao - HSDPA

1/11

ti: Truy nhp gi ng xungtc cao - HSDPA

Ging vin hng dn: TS. Nguyn Phm Anh Dng

Sinh vin: Nguyn Huyn Trang

Trn Vn HiL c Kin

Lu Cng Thnh
http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/http://capquangpro.com/


2/11

HSDPA (High Speed Downlink Packet Access), gi ngtruyn tc cao, l mt sn phm ca cng ngh 3G chophp cc mng hot ng trn h thng UMTS c kh nngtruyn ti d liu vi tc cao.

HSDPA c pht trin da trn cng ngh WCDMA, s dngcc phng php chuyn i v m ha d liu khc. N tora mt knh truyn d liu bn trong WCDMA c gi lHS-DSCH (High- Speed Downlink Shared Channel)- knh chia

s ng xung tc cao.

Ngoi HS-DSCH, cn c 3 knh truyn ti d liu khc cngpht trin: HS-SCCH, HS-DPCCH, HS-PDSCH.


3/11

So snh cc nh nng knh DCH v HS-DSCH

iu khin ti nguyn cho HS-DSCH

Nt B RNCCng sut sng mang ang pht ca tt c cc

m khng s dng cho HS-DSCH hay HS-SCCH

Gii hn tng cng sut HSDPA

Gi tr o tc bit HS-DSCH cung cp

Gi tr o cng sut HS-DSCH yu cu

Tc bit cn m bo

B lp biuiu khin cho php

iu khin nghn


4/11

iu ch bc cao

H tr truyn dn nhiu lung

m bo tc d liu cao khi UE hay nt B khng ctrangb nhiu ngten

an xen cho knh HS-DSCH


5/11

Cc chin lc lp biu hiu qu yu cu ti thiu

Thng tin v cc iu kin knh tc thi ti UE

Thng tin v trng thib m v mc u tin ca cc lun sliu

S l u tin trong b lp biu


6/11

Tng quan hot ng HARQ caHSDPA

RLC ACK

1.Gi n bm nt B

2.Pht lnu

3.NACK

4.Pht li

5.Kt hp

pht li

RNC

u

cui

Nt

B


7/11

Qu trnh x l HARQ ti lp vt l

Mi thc th HARQ c th h tr nhiu x l HARQ kiu dngv i nn cn chn s ln HARQ cho ph hp vi thi gian

quay vng.Thit k giao thc gi thit:thi gian gia kt thc khi truynti thu c v pht ACK/NAK.

B lp biu iu hnh vic x l HARQ no s s dng cho ln

pht hin thi v thng bo iu ny cho UE.Thc hin chuyn theo th t cho cc x l HARQ v cn thchin mt hng i sp xp sp t li th t trong UE MAC-hs


8/11

Knh bo hiu iu khin ng xung: HS-SCCH

HS-SCCH l knh vt l ng xung chia s mangthng tin bo hiu iu khin cn thit UE c th

gii tri ph, gii iu ch v gii m knh HS-DSCH.

Knh bo hiu iu khin ng xung: F-DPCH

Knh F-DPCH c a ra nhm gim s lng ccm nh knh cn s dng cho cc knh dnh ring.


9/11

Bo hiu iu khin ng ln: HS-DPCCH

HS-DPCCH s dng m nh knh tch bit viDPCCH ng ln thng thng , bo hiu ny c

mang trn mt knh vt l mi b sung.

Bo hiu iu khin cho HSDPA-MIMO

Bo hiu iu khin ngoi bng c ci tin choph hp. Bo hiu trong bng dng tiu MAC-eskhng cn thay i.


10/11

HSDPA MIMO h tr truyn dn hai lung. Mi lung cx l lp vt l nh nhau.

HS-DSCH c ci tin h tr hai khi truyn ti trn mtTTI.


11/11

Truy nhập gói đường xuống tốc độ cao - HSDPA

Documents

Transcript of Truy nhập gói đường xuống tốc độ cao - HSDPA